WO2021248290A1 - Backscatter-based remote control device and environmental information acquisition device - Google Patents

Abstract

The present application relates to a backscatter-based remote control device and an electronic device having a remote control function. The backscatter-based remote control device comprises an antenna, a receiver, and a backscatter transmitter; the antenna is used for receiving a radio frequency signal, transmitting the radio frequency signal, and transmitting a backscatter signal; the receiver is used for receiving, by means of the antenna, a carrier CW signal transmitted by an electronic device; and the backscatter transmitter is used for transmitting the backscatter signal to the electronic device on the basis of the CW signal and by means of the antenna, the backscatter signal comprising control information for the electronic device. Embodiments of the present application can provide a remote control device which does not need a power supply.

Description

Remote control equipment and environmental information acquisition equipment based on backscatter Technical field

This application relates to the technical field of power management, and in particular, to a remote control device and environmental information collection device based on backscatter.

Background technique

Wireless controllers are commonly used in consumer electronic product usage scenarios, such as remote controls for televisions, air conditioners, indoor lights, curtains, etc., and control handles for game consoles, virtual reality devices, augmented reality devices, etc., and so on. With the change of technology, the performance of various electronic products has been continuously improved, but for the wireless controller itself, as a sub-category of electronic products, it has received less attention for a long time, and the development and improvement of wireless controllers are relatively scarce. . Traditional wireless controllers such as remote controllers need to carry batteries for power supply, and their appearance design is cumbersome. The replacement of the batteries will not only cause inconvenience in use, but also cause environmental pollution. In addition to battery power supply, currently available mainly rechargeable controllers or controllers that convert mechanical energy into electrical power supply.

For rechargeable wireless controllers, the need for repeated battery replacement is eliminated, and the convenience of charging is improved. However, there is still a need for built-in rechargeable batteries for this controller. There are limitations in the overall design and it takes time to charge the controller. .

For the controller that can convert mechanical energy into electrical energy, it meets the requirements that the controller does not carry a battery and does not need to be charged. However, the method of converting mechanical energy to electrical energy is only suitable for some specific scenarios. For example, one implementation requires the user to carry a controller to convert the mechanical energy generated by its own motion into electrical energy for use by the controller through the magnetoelectric effect. The implementation process is not simple. In addition, the energy generated by mechanical energy cannot be stored for a long time. For example, the converted electrical energy can be stored in a capacitor. Since the self-discharge of the capacitor is faster than that of a battery, the converted electrical energy cannot be stored for a long time, and stable and continuous supply cannot be guaranteed. Electrical energy.

Summary of the invention

In view of this, the embodiment of the present application provides a remote control device based on backscatter and an electronic device with remote control function, as well as a backscatter-based environmental information collection device and Terminal Equipment.

The embodiment of the application provides an electronic device with remote control function, including: an antenna, a transmitter, a receiver, and a controlled module; wherein the antenna is used for receiving and transmitting radio frequency signals; the transmitter is used for The carrier CW signal is sent to the remote control device through the antenna; the receiver is used to receive the backscatter signal from the remote control device through the antenna, and the backscatter signal includes control information; the controlled mode The group is used to cause the electronic device to perform a corresponding operation according to the control information.

An embodiment of the present application also provides a remote control device based on backscatter, including: an antenna, a receiver, and a backscatter transmitter, where the antenna is used to receive radio frequency signals, send radio frequency signals, and send backscatter signals; The receiver is used to receive the carrier CW signal sent by the electronic device through the antenna; the backscatter transmitter is used to send the backscatter signal to the electronic device through the antenna based on the CW signal, so The backscatter signal includes control information for the electronic device.

The embodiment of the present application also provides an environmental information collection device based on backscatter, including: an environmental information collection module, an environmental information processing module, an antenna, a receiver, and a backscatter transmitter, wherein the environmental information collection The module is used to collect the analog signal of environmental information; the environmental information processing module is used to convert the analog signal of the environmental information into a voltage analog signal; the antenna is used to receive radio frequency signals, transmit radio frequency signals, and transmit reverse Scattering signal; the receiver is used to receive a carrier CW signal through the antenna; the backscatter transmitter is used to send a backscatter signal to the electronic device through the antenna based on the CW signal, the The backscatter signal is encoded to include the voltage analog signal.

An embodiment of the present application also provides a terminal device, including: an antenna, a transmitter, a receiver, and an environmental information processing module; wherein, the antenna is used for receiving and transmitting radio frequency signals; the transmitter is used for passing through all The antenna sends a carrier CW signal to the environmental information collection device; the receiver is used to receive the backscatter signal from the environmental information collection device through the antenna, and the backscatter signal includes a voltage analog signal after encoding; The environmental information processing module is used for preprocessing the voltage analog signal.

The embodiments of the present application provide a remote control device based on backscatter and an environmental information collection device based on backscatter. The remote control device based on backscatter can send digital signals of control information to the controlled device through a carrier wave to achieve the purpose of remote control; The environmental information collection device based on backscatter can send the collected analog signal of the environmental information to the target object through the carrier, for example, the sound analog signal received by the microphone is sent to the mobile phone. On the basis of realizing the audio data transmission, due to the reverse The direction scattering process does not require power support, so the battery can be eliminated, and the product hardware can be designed to be lighter, thinner, portable, environmentally friendly, and improve the overall expressiveness and competitiveness of the product and its system.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of an electronic device with a remote control function according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a remote control device based on backscatter in an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a passive controller system according to an embodiment of the present application.

Fig. 4 is a schematic diagram of a communication interaction flow between a remote control device and a controlled device according to an embodiment of the present application.

5 and 6 are schematic diagrams of the hardware structure of two remote control devices based on backscattering according to an embodiment of the present application.

7 and 8 are schematic diagrams of the hardware structure of an electronic device with a remote control function in two embodiments of the present application.

Figures 9, 10, and 11 are schematic diagrams of various passive controller system architectures according to embodiments of the present application.

Fig. 12 is a schematic structural diagram of an environmental information collection device based on backscattering according to an embodiment of the present application.

FIG. 13 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

FIG. 14 is a schematic diagram of the system architecture of a microphone and a smart phone integrated with a CW transmitter according to an embodiment of the present application.

FIG. 15 is a schematic diagram of the system architecture of a microphone, a separately set CW transmitter, and a smart phone according to an embodiment of the present application.

FIG. 16 is a schematic diagram of the hardware structure of a microphone based on backscattering according to an embodiment of the present application.

17 and 18 are schematic diagrams of the hardware structure of two backscatter-based microphones according to an embodiment of the present application.

FIG. 19 is a schematic diagram of the hardware structure of a backscatter-based sensor according to an embodiment of the present application.

20 and 21 are schematic diagrams of the microphones of the embodiments of the present application being integrated in two kinds of smart devices to communicate and interact with the terminal device.

detailed description

The technical solutions of the embodiments of the present application will be described below in conjunction with the drawings of the embodiments of the present application. Among them, the various details of the embodiments of the present application are described to help understanding, and are only used as exemplary implementations. Those skilled in the art should recognize that various changes or modifications can be made to the specific implementations described, but not It will go against the principle and spirit of the embodiments of the present application, so these changes and modifications all fall into the protection scope of the embodiments of the present application. In addition, for clarity and conciseness, the description of certain well-known functions and structures is omitted in the description of the specific implementation manners, which does not affect the implementation of the embodiments of the present application. In the various embodiments of the application described herein, in the absence of mutual exclusion, different embodiments can be implemented in any combination to achieve basic and/or further superimposed beneficial technical effects.

The term "and/or" in this article is used to describe the association relationship of multiple associated objects, for example, it means three possible association relationships between two associated objects. For example, A and/or B can mean: A alone exists, and at the same time. There are three situations: A and B, and B alone. The character "/" in this text generally means that the associated objects before and after are "or".

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the various processes involved does not mean the sequence of execution. The execution sequence of each process is determined by its function and internal logic, so the size of the sequence number It does not constitute a special limitation on the implementation process of the embodiments of the present application.

Before describing the embodiments of the present application, a brief introduction to the backscattering technology is firstly given. Backscatter technology is a wireless technology that realizes signal transmission and coding without an active transmitter. The principle of backscatter technology is similar to the principle of radar. In the backscatter technology, part of the electromagnetic wave will be reflected when it hits the surface of an object. The strength of the reflected signal depends on the shape, material and distance of the object. From the perspective of radar, each object has its radar cross section (RCS). In a backscatter system, the tag can encode the reflected signal by changing its RCS.

FIG. 1 shows an electronic device 10 with remote control function according to an embodiment of the present application, which includes: an antenna 12, a transmitter 14, a receiver 16 and a controlled module 18; among them,

The antenna 12 is used to receive radio frequency signals and transmit radio frequency signals;

The transmitter 14 is used to send a carrier CW signal to the remote control device through the antenna 12;

The receiver 16 is configured to receive the backscatter signal from the remote control device through the antenna 12, and the backscatter signal includes control information;

The controlled module 18 is used for causing the electronic device 10 to perform corresponding operations according to the control information.

In the embodiment of the present application, the electronic device 10 with a remote control function is used as a controlled device (such as a TV, a fan, etc.) and can be used in conjunction with a remote control device. When used, the electronic device 10 sends a carrier wave (Carrier Wave, CW) signal, the remote control device can use the CW wave as a carrier wave to transmit digital signal control information through the backscatterer (for example, pressing a button indicates that the control information is to increase the volume of the TV set), and the electronic device 10 receives the digital signal control information Then you can perform the corresponding operation (turn up the volume).

Correspondingly, FIG. 2 shows a backscatter-based remote control device 20 according to an embodiment of the present application, which can be used in conjunction with the electronic device 10 in FIG. 1. The remote control device 20 includes: an antenna 22, a receiver 24, and a reverse To the scattering transmitter 26, in which,

The antenna 22 is used to receive radio frequency signals, send radio frequency signals, and send backscatter signals;

The receiver 24 is configured to receive the carrier CW signal sent by the electronic device through the antenna 22;

The backscatter transmitter 26 is configured to send a backscatter signal to the electronic device through the antenna 22 based on the CW signal, and the backscatter signal includes control information for the electronic device.

In the embodiment of the present application, the remote control device 20 based on backscattering transmits a backscatter signal to the electronic device 10 after receiving, for example, the carrier CW signal sent by the electronic device 10 in the embodiment of FIG. The scattered signal is encoded with digital signal control information (for example, the control information corresponding to 0001 is to increase the volume of the TV set) to realize the control of the electronic device.

The remote control device 20 in the embodiment of the present application uses a backscatter transmitter to send digital signals. Therefore, the remote control device 20 does not need electricity during the working process, and therefore does not need batteries or recharge. In this case, the product design of the remote control device 20 can be Breaking the original limitations, the product design can be made lighter and thinner, and the product expression and competitiveness can be improved. The feature that does not require charging can enhance the user experience and promote the technology update and iteration in related fields.

The electronic device 10 (controlled device) and the remote control device 20 (controller) of the embodiments of the present application together form a passive controller system based on backscatter technology. FIG. 3 schematically shows this passive control system. The architecture of the monitor system. In the system of the schematic embodiment in FIG. 3, the controller is a TV remote control, and the controlled device is a TV. In specific use, the controlled device needs to transmit a CW wave to the controller. The controller uses this CW wave as a carrier wave to transmit digital signal information through the backscatter transmitter. The controlled device completes the control operation after receiving the information.

For the controller of the embodiment of the present application, it is a control device containing a physical button or a touch sensor. The controller should have a signal transmission function and may also have a receiver function for processing the interrogation ASK signal.

For the controlled device in the embodiment of this application, it should have a transmitter and a receiver. The transmitter is used to transmit CW signals, and the receiver is responsible for receiving backscatter data. There are no special requirements for other functional modules of the controlled device, such as the functions that a traditional TV should have, so I won’t repeat them here.

The structure of the electronic device with remote control function in the embodiment of the present application will be described in further detail below.

In the embodiment of the present application, optionally, the transmitter 14 in the electronic device 10 is further used to send an inquiry signal to the remote control device, and after receiving the confirmation signal of the remote control device, determine to send the CW signal to the remote control device.

In the embodiment of the present application, optionally, the interrogation signal sent by the transmitter 14 to the remote control device is also used to make the remote control device collect radio frequency energy.

In the embodiment of the present application, optionally, the electronic device 10 further includes a duplexer and/or a modem; wherein the duplexer is used to enable the reception and transmission of radio frequency signals to achieve simultaneous and/or same frequency; the modem Used to modulate and demodulate the signal.

In the embodiment of the present application, optionally, the electronic device 10 further includes a combiner for connecting multiple antennas to the electronic device.

In the embodiment of the present application, optionally, the electronic device 10 may be at least one of the following devices: household appliances, smart speakers, electronic game console devices, virtual reality devices, and augmented reality devices.

In the embodiment of the present application, optionally, the CW signal sent by the transmitter 14 to the remote control device through the antenna has a first duty cycle (duty cycle), and this duty cycle may be based on specific hardware and / Or application scenario to set.

The hardware structure of the remote control device based on backscattering in the embodiments of the present application will be described in further detail below.

In the embodiment of the present application, optionally, the receiver 24 in the remote control device 20 is further configured to receive the inquiry signal sent by the electronic device through the antenna;

The backscatter transmitter 26 is also used to send a confirmation signal to the electronic device in a backscatter manner through the antenna.

In the embodiment of the present application, optionally, the remote control device 20 further includes a physical button, an IO control module, and a microprocessor, wherein the physical button is used to receive an external touch operation; the IO control module is used to The control signal corresponding to the touch operation is transmitted to the microprocessor; the microprocessor is used to convert the control signal into digital control information, and according to the duty ratio of the CW signal, encode the digital control information to The CW signal.

In the embodiment of the present application, optionally, the remote control device 20 further includes an energy collection module for collecting radio frequency energy.

In the embodiment of the present application, optionally, the energy harvesting module or the receiver includes a diode and a capacitor.

In the embodiment of the present application, optionally, the remote control device 20 further includes an energy storage module for storing the radio frequency energy collected by the energy harvesting module.

In the embodiment of the present application, optionally, the energy storage module includes a capacitor and a power management module, and the power management module is used to supply power to the active devices in the remote control device.

In the embodiment of the present application, optionally, the backscatter transmitter 26 includes a field effect transistor FET switch and an oscillator.

Based on the above various embodiments, the electronic device 10 (controlled device) and the remote control device 20 (controller) can implement the communication interaction process as shown in FIG. 4.

Specifically, the controlled device transmits an interrogation signal, and after receiving the interrogation signal, the controller transmits the confirmation signal by way of backscattering. After the controlled device receives the confirmation signal, it transmits the CW signal according to the set duty cycle. The duty cycle can be set according to the hardware type and/or application scenarios. The controller receives the control request triggered by the user. For example, when the user presses a certain control key on the controller, the controller can encode the reflected CW signal. This code is a digital domain code. For example, the code corresponding to button A is 0001, and the button The code corresponding to B is 0010, and so on. After receiving this digital signal, the controlled device can complete the control required operation.

Fig. 5 schematically shows a schematic diagram of the hardware structure of a remote control device according to an embodiment of the present application. The remote control equipment mainly includes: antenna, backscatter transmitter, energy harvesting module/receiver, microprocessor and input and output IO control module.

Specifically, the antenna is used for radio frequency energy collection, receiver signal reception, and backscatter signal transmission. The backscatter transmitter is used to modulate the received CW signal and transmit it through the antenna. The energy harvesting module is used to collect radio frequency energy, and the energy storage module is used to store radio frequency energy, which is the energy source of the entire controller. The energy harvesting module, the energy storage module and the receiver can use the same module in hardware, that is, the rectifier. The receiver uses an envelope detector to demodulate the ASK signal. The IO control module is used to transmit the signals of the physical buttons and touch sensors to the microprocessor. The microprocessor is used for digital signal processing, signaling and control in signal processing, and converts physical button information into digital transmission information.

Fig. 6 schematically shows a schematic diagram of the hardware structure of another remote control device according to an embodiment of the present application. Among them, the transmitter includes a FET switch and an oscillator. The energy harvesting module/receiver includes diodes and capacitors. The energy storage module includes a capacitor and a power management chip, and the power management chip is used to supply power to other active devices.

The controlled device in this embodiment of the application completes cooperation with the controller based on the transceiver module. FIG. 7 schematically shows a hardware structure diagram of a controlled device transceiver module in this embodiment of the application. The controlled device transceiver module mainly includes: antenna, duplexer, transmitter, receiver and modem.

Specifically, the antenna is used to transmit and receive radio frequency signals, and the duplexer is used to achieve simultaneous and/or same frequency radio frequency signal reception and transmission. The transmitter is used to transmit CW waves and ASK signals. The receiver is used to receive the signal from the controller. The modem is used to process the digital signal. The modem converts the signal received by the receiver into the control information required by the controlled equipment standard, so that the controlled equipment can complete the control operation.

FIG. 8 schematically shows a schematic diagram of the hardware structure of another transceiver module according to an embodiment of the present application. Compared with the embodiment of Fig. 7, the transceiver module of the embodiment of Fig. 8 adopts multiple antennas to increase the coverage area of the radio frequency signal. Among them, the combiner is used for separation and gathering of radio frequency signals, and the combiner can be connected to multiple antennas to achieve a wider coverage area.

Fig. 9, Fig. 10 and Fig. 11 respectively show schematic diagrams of various application scenarios of an embodiment of the present application. As shown in Figure 9, the embodiment of the present application can be applied to the control of augmented reality AR or virtual reality VR devices. Existing AR and VR devices include controller handles, but most of them use rechargeable batteries. The aforementioned transceiver module of the embodiment of the application can be embedded in the AR/VR device, and the remote control device of the embodiment of the application can provide a solution for the AR/VR control handle without power supply.

As shown in Fig. 10, similarly, the embodiment of this application can be applied to game machines such as "Xbox", "play station", etc. The transceiver module mentioned in the embodiment of this application can be integrated into a game device, and the remote control device is a game controller. Can realize the remote control game process based on backscatter.

As shown in Figure 11, the embodiments of this application can be applied to Internet of Things (IoT) devices, such as smart speakers or Customer Premises Equipment (CPE), which are often used as home IoT device control centers, and others in the home IoT devices such as smart lights and smart curtains can all be controlled by it.

In application, the remote control device of the embodiment of the application does not directly control the IoT device, but realizes the control of the IoT device by controlling a smart speaker or a central controller such as a CPE. The aforementioned transceiver module of the embodiment of the application can be integrated In a smart speaker or CPE, a remote control device is used to control the smart speaker or CPE, thereby achieving the purpose of controlling various IoT devices in the home.

At least one of the above embodiments of the present application makes full use of the advantage that the backscatter transmitter does not require power supply, combined with radio frequency energy harvesting technology, and the overall battery-free design of the controller, which can reduce the volume and weight of the remote control device and make the product lighter and thinner. Eliminate the trouble of repeatedly changing batteries or charging, and improve the ease of use and portability of remote control devices and their systems.

The above describes the backscatter-based remote control device and the controlled equipment used in the embodiments of the present application through multiple embodiments. The digital signal of the control command can be encoded in the CW wave and sent to the controlled equipment to realize the corresponding remote control. operate.

The following describes in detail the contents of the backscatter-based environmental information collection device and terminal device provided in the embodiments of the present application.

First of all, it should be understood that wireless transmission is widely used in the transmission of analog signals, such as analog signals such as sound, light, temperature, and humidity. Microphones (also called microphones) are widely used in personal communication, entertainment, business and other fields as a device for collecting and processing sound signals. Specifically, wireless microphones can use different wireless standard protocols, and most Bluetooth headsets have a microphone function. Wireless microphones used in entertainment equipment such as KTV also use proprietary radio frequency protocols near 400MHz and 2.4GHz. However, whether it is a discrete or integrated wireless microphone, it needs to be powered by a battery in the device. Not only does it have a certain impact on the power consumption of the product, it is also not easy to integrate into small-sized, low-power electronic products. At present, common wireless microphones mainly transmit sound signals in two ways: analog signals and digital signals. Both of these methods require a certain amount of power consumption and require the device to have a battery.

More specifically, a digital wireless microphone converts an analog signal into a digital signal in a microphone device before transmitting it (for example, a microphone integrated in a Bluetooth headset). First, the integrated microphone converts the analog sound signal into an analog voltage signal. The analog-to-digital converter ADC in the digital microphone module converts the analog voltage signal into a digital signal. This signal is input into the chip responsible for audio decoding in the headset. The audio chip encodes the digital signal according to a specific wireless standard, such as conforming to the Bluetooth standard The audio coding signal is finally transmitted through a radio frequency transmitter. This kind of digital microphone can achieve good results with high fidelity. However, the hardware structure of this digital wireless microphone is complicated and requires the cooperation of multiple chips and multiple modules. Therefore, the power consumption is relatively large and it is difficult to reduce, and it is necessary to carry a battery.

In view of this, the embodiments of the present application also provide an environmental information collection device based on backscatter, such as a sensor for collecting temperature, humidity, etc., or a microphone device for collecting sound.

12, the environmental information collection device 100 based on backscattering includes: an environmental information collection module 102, an environmental information processing module 104, an antenna 106, a receiver 108, and a backscatter transmitter 110, in which,

The environmental information collection module 102 is used to collect analog signals of environmental information;

The environmental information processing module 104 is configured to convert an analog signal of the environmental information into a voltage analog signal;

The antenna 106 is used to receive radio frequency signals, send radio frequency signals, and send backscatter signals;

The receiver 108 is configured to receive a carrier CW signal through the antenna 106;

The backscatter transmitter 110 is configured to send a backscatter signal to the electronic device through the antenna 106 based on the CW signal, and the backscatter signal includes the voltage analog signal. For example, optionally, the backscatter signal may carry the voltage analog signal through encoding.

Correspondingly, referring to FIG. 13, an embodiment of the present application also provides a terminal device 200, including: an antenna 202, a transmitter 204, a receiver 206, and an environmental information processing module 208; wherein,

The antenna 202 is used to receive radio frequency signals and transmit radio frequency signals;

The transmitter 204 is configured to send a carrier CW signal to the environmental information collection device through the antenna;

The receiver 206 is configured to receive a backscatter signal from the environmental information collection device through the antenna, and the backscatter signal includes a voltage analog signal after encoding;

The environmental information processing module 208 is used for preprocessing the voltage analog signal.

Take the microphone or microphone to collect the sound analog signal and send it to the smart phone as an example. The CW wave can be transmitted to the microphone by the carrier CW transmitter integrated in the smart phone or set separately. The microphone uses this CW wave as the carrier wave through backscattering The transmitter transmits the FM analog signal of the collected sound data, and the smart phone can process the sound data after receiving the analog signal.

The embodiment of the application uses the backscatter technology to transmit the analog signal through frequency modulation. Since there is no traditional transmitter and no high-frequency local oscillator, the wireless microphone can achieve extremely low power consumption, combined with radio frequency energy collection, It can achieve battery-free operation and become the first wireless microphone that does not require batteries. It can provide users with convenience for long-term use, and the overall design can be greatly compressed in size, which is convenient for use in different application scenarios.

In the embodiment of the present application, optionally, the backscatter transmitter 110 includes a field effect transistor FET switch and an oscillator. When the FET switch is closed, the antenna is short-circuited, and when the FET is turned on, the antenna works The oscillator is used to control the closing or opening of the FET switch.

In the embodiment of the present application, optionally, the environmental information collection device 100 further includes an energy collection module for collecting radio frequency energy. Optionally, the energy harvesting module or receiver includes a diode and a capacitor.

In the embodiment of the present application, optionally, the environmental information collection device 100 further includes an energy storage module for storing radio frequency energy collected by the energy collection module. Optionally, the energy storage module includes a capacitor and a power management module, and the power management module is used to supply power to active devices in the remote control device.

In addition, optionally, the environmental information collecting device 100 may further include a control module for controlling the environmental information collecting device to be turned on or off.

The implementation process of the embodiments of the present application will be described in detail below in conjunction with multiple drawings. It should be understood that the "microphone", "microphone" and "wireless microphone" mentioned in the embodiments of this application all refer to their conventionally understood concepts, that is, they belong to a kind of microphone or an acousto-electric transducer, which is acted on by sound waves. The voltage is generated on the electro-acoustic element, and then converted into electric energy, which can be used in various loudspeaker equipment. In most cases in this article, the above three statements are interchangeable and will not bring about ambiguity in understanding.

FIG. 14 is a system architecture diagram of a microphone and a smart phone integrated with a CW transmitter, and FIG. 15 is a case where the CW transmitter is separately installed, which can implement the processing process of the embodiment of the present application. FIG. 16 schematically shows a hardware structure diagram of a microphone according to an embodiment of the present application, which includes an antenna, a FET switch, an oscillator, and a microphone module.

When working, the wireless microphone converts the analog sound signal into an analog voltage signal. This microphone module can convert the sound signal that can be recognized by the human ear into a voltage signal whose voltage changes continuously in the range of [a,b]V, where the values of a and b The value can be set according to actual conditions. Further, the voltage controlled oscillator converts the voltage signal of varying amplitude into voltage signals of different frequencies. Optionally, the voltage controlled oscillator converts the voltage with a continuous voltage range in the [a,b]V interval into a voltage signal with a continuously changing frequency in the [c,d]Hz interval.

Among them, the FET switch is used to control the matching of the antenna. Specifically, when the FET switch is closed, the antenna is in a short-circuit state, that is, the reflected energy is the smallest; when the FET switch is turned on, the antenna is in the optimal matching state, so the reflected energy is the largest. Thus, through the repeated closing and opening of the FET switch, the frequency modulation modulation of the reflected signal can be realized. Further, the opening and closing frequency of the FET switch is controlled by an oscillator, which can realize a complete process of converting an analog sound signal into an analog radio frequency signal for transmission.

In the embodiment of the present application, the backscatterer uses the acquired CW signal as the carrier for up-conversion modulation, so the backscatter device does not need an oscillator to generate high-frequency signals, which can save energy; since the hearing range of human ears is 20Hz to 20KHz Compared with the traditional radio frequency transmitting device, the oscillator of the embodiment of the present application only needs to generate a low-frequency, narrow-range frequency signal, which can greatly reduce the power consumption requirement.

The hardware structure of the wireless microphone in the embodiment of FIG. 17 contains a control circuit for operating the microphone on and off. When the wireless microphone is integrated in other equipment, the control circuit can interact with the data of other modules in the equipment.

The wireless microphone hardware structure in the embodiment of FIG. 18 is connected with a radio frequency energy collection and storage device to realize a wireless microphone that does not require battery power. The rectifier in Figure 18 (can convert the received AC RF energy into DC DC energy, this DC energy is stored in the capacitor, and the use of energy is controlled by the power management chip, the power supply of all active devices in the wireless microphone is collected The received radio frequency energy is supplied, so the wireless microphone does not need an external battery. The rectifier can use the same module as the energy harvesting module, energy storage module and receiver in the hardware.

The above embodiments in Figures 14-18 are based on the design of the hardware structure of the analog microphone module, and the analog signal can be transmitted by means of radio frequency analog transmission. Similarly, other analog sensors can also be used to achieve wireless signal transmission. As shown in Figure 19, the sensor used needs to have the function of converting environmental analog signals into voltage analog signals. For example, a temperature sensor converts the ambient temperature signal into an analog voltage signal; another example is a pressure sensor, which converts a force signal into a voltage signal; another example is a humidity sensor, which converts humidity information into a voltage signal. Then, an oscillator converts the voltage signal of varying amplitude into voltage signals of different frequencies. Further, the oscillator controls the opening and closing frequency of the FET switch to realize complete conversion of analog temperature, pressure or humidity signals into analog radio frequency signals for transmission.

For the environmental information collection device 100 based on backscattering in the embodiment of the present application, since there is no need to install a battery, the overall design size of hardware such as a wireless microphone can be reduced as much as possible, so that the microphone can be easily integrated in various smart devices. Used in.

20 and 21 show schematic diagrams of the effect of integrating the wireless microphone of the embodiment of the present application into a smart device to perform data interaction with a terminal device. Referring to FIG. 20, the environmental information collection device can be integrated in the smart watch to reduce the power consumption of the smart watch. In use, the smart phone transmits the CW signal as the carrier wave, and the smart watch sends the voice signal (or the signal collected by other types of sensors) to the smart terminal in a backscattering manner.

Referring to FIG. 21, the environmental information collection device of the embodiment of the application can be integrated into the smart ring. Due to the small size of the smart ring, various types of batteries are difficult to carry, and the environmental information collection device provided by the embodiment of the application does not require a battery. The volume is greatly compressed, so that the environmental information collection device can be integrated in the smart ring, so that the smart ring, which is a small volume, can complete the voice control of the mobile phone without carrying a battery.

The embodiments of this application apply backscattering technology to the direct emission of analog signals for the first time. The designed environmental information collection device eliminates the need for traditional batteries, thus liberating the freedom of product design and realizing ultra-thin design. The environmental information collection device (such as microphone or sensor device) in the embodiment of the application adopts simple circuit design, avoids complicated hardware structure, can greatly reduce system power consumption, and can be used alone or easily integrated into other products. It is easy to use and is beneficial to popularize to various application scenarios.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the equipment, modules, systems, devices and corresponding functions and processing methods described in the above different embodiments are not mutually exclusive. It can be combined and implemented in any manner to achieve basic and/or further beneficial technical effects. The process of combining different embodiments will not be repeated here.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Covered in the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims (27)

An electronic device with remote control function, including: antenna, transmitter, receiver and controlled module; among them, The antenna is used to receive radio frequency signals and transmit radio frequency signals; The transmitter is used to send a carrier CW signal to a remote control device through the antenna; The receiver is configured to receive a backscatter signal from the remote control device through the antenna, and the backscatter signal includes control information; The controlled module is used for causing the electronic device to perform corresponding operations according to the control information. The electronic device according to claim 1, wherein: The CW signal sent by the transmitter to the remote control device through the antenna has a first duty cycle. The electronic device according to claim 1 or 2, wherein: The transmitter is also used to send an inquiry signal to the remote control device, and after receiving the confirmation signal of the remote control device, determine to send the CW signal to the remote control device. The electronic device according to any one of claims 1 to 3, wherein: The interrogation signal sent by the transmitter to the remote control device is also used to enable the remote control device to collect radio frequency energy. The electronic device according to any one of claims 1 to 4, further comprising: a duplexer and/or a modem; wherein, The duplexer is used to enable the reception and transmission of radio frequency signals to achieve simultaneous and/or same frequency; The modem is used to modulate and demodulate the signal. The electronic device according to any one of claims 1 to 5, further comprising: The combiner is used to connect multiple antennas to the electronic device. The electronic device according to any one of claims 1 to 6, the electronic device with remote control function comprising at least one of the following: Household appliances, smart speakers, electronic game equipment, virtual reality equipment, and augmented reality equipment. A remote control device based on backscatter, including: antenna, receiver, backscatter transmitter, among which, The antenna is used to receive radio frequency signals, send radio frequency signals, and send backscatter signals; The receiver is configured to receive the carrier CW signal sent by the electronic device through the antenna; The backscatter transmitter is configured to send a backscatter signal to the electronic device through the antenna based on the CW signal, and the backscatter signal includes control information for the electronic device. The electronic device according to claim 8, wherein: The CW signal has a first duty cycle. The remote control device according to claim 8 or 9, wherein: The receiver is further configured to receive the interrogation signal sent by the electronic device through the antenna; The backscatter transmitter is also used to send a confirmation signal to the electronic device in a backscatter manner through the antenna. The electronic device according to any one of claims 8 to 10, further comprising: a physical button, an IO control module and a microprocessor, wherein: The physical button is used to receive an external touch operation; The IO control module is used to transmit the control signal corresponding to the touch operation to the micro-processing; The microprocessor is used to convert the control signal into digital control information, and encode the digital control information into the CW signal according to the duty ratio of the CW signal. The remote control device according to any one of claims 8 to 11, further comprising: Energy harvesting module for collecting radio frequency energy. The remote control device according to claim 12, wherein: The energy harvesting module or the receiver includes a diode and a capacitor. The remote control device according to claim 12 or 13, further comprising: The energy storage module is used to store the radio frequency energy collected by the energy harvesting module. The remote control device according to claim 14, wherein: The energy storage module includes a capacitor and a power management module, and the power management module is used to supply power to active devices in the remote control device. The remote control device according to any one of claims 8 to 15, wherein: The backscatter transmitter includes a field effect transistor FET switch and an oscillator. An environmental information collection device based on backscatter, including: an environmental information collection module, an environmental information processing module, an antenna, a receiver, and a backscatter transmitter, wherein, The environmental information collection module is used to collect analog signals of environmental information; The environmental information processing module is used to convert the analog signal of the environmental information into a voltage analog signal; The antenna is used to receive radio frequency signals, send radio frequency signals, and send backscatter signals; The receiver is configured to receive a carrier CW signal through the antenna; The backscatter transmitter is configured to send a backscatter signal to the electronic device through the antenna based on the CW signal, and the backscatter signal includes the voltage analog signal. The environmental information collection device according to claim 17, wherein the backscatter signal includes the voltage analog signal, including: The backscatter signal carries the voltage analog signal through encoding. The environmental information collection device according to claim 17 or 18, wherein: The backscatter transmitter includes a field effect transistor FET switch and an oscillator. When the FET switch is closed, the antenna is short-circuited, when the FET is turned on, the antenna works, and the oscillator is used to control the FET switch to close. Or turn it on. The environmental information collection device according to any one of claims 17 to 19, further comprising: Energy harvesting module for collecting radio frequency energy. The environmental information collection device according to claim 20, wherein: The energy harvesting module or the receiver includes a diode and a capacitor. The environmental information collection device according to claim 20 or 21, further comprising: The energy storage module is used to store the radio frequency energy collected by the energy harvesting module. The environmental information collection device according to claim 22, wherein: The energy storage module includes a capacitor and a power management module, and the power management module is used to supply power to active devices in the remote control device. The environmental information collection device according to any one of claims 17 to 23, further comprising: The control module is used to control the environmental information collection device to be turned on or off. The environmental information collection device according to any one of claims 17 to 24, wherein the environmental information collection device comprises: a microphone or a sensor. A terminal device, including: an antenna, a transmitter, a receiver, and an environmental information processing module; wherein, The antenna is used to receive radio frequency signals and transmit radio frequency signals; The transmitter is used to send a carrier CW signal to the environmental information collection device through the antenna; The receiver is configured to receive a backscatter signal from the environmental information collection device through the antenna, and the backscatter signal includes a voltage analog signal after encoding; The environmental information processing module is used for preprocessing the voltage analog signal. The terminal device according to claim 26, wherein: The environmental information collection device includes a microphone or a sensor.

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