CN202458381U - Finger-clamping blood oxygen saturation measuring device having the capability of automatic power on/off and provided with pedometer - Google Patents

Abstract

A finger clip-on blood oxygen saturation detection device with pedometer function, which includes a microprocessor, a detector for detecting pulse and blood oxygen saturation, a power supply, and a display screen, and the power supplies are respectively connected to A detector, a microprocessor and a display screen, the microprocessor is connected to the detector and the display screen, the microprocessor includes a blood oxygen module, a pedometer module, a display driver module and a shake detection module, and the microprocessor is also connected to There is an acceleration sensor for sequentially switching the display direction of the display after detecting the shaking of the detection device. The utility model uses an acceleration sensor on the pulse oximeter detector, and integrates the pedometer function, and integrates two independent products into one product, which improves the utilization rate of the chip and reduces the use cost. Realize the function of automatic switch machine, convenient to use, avoid the power consumption problem caused by forgetting to turn off the machine, and do not actively start the detection when it is in standby, which reduces the standby power consumption.

Description

A finger-clamp blood oxygen saturation detection device with pedometer function that can automatically switch on and off

technical field

The utility model relates to a medical device, in particular to a human body health condition detection device which cuts the screen by shaking, integrates the function of a pedometer and the detection function of pulse oxygen saturation, and can automatically switch on and off.

Background technique

Blood oxygen saturation measuring instrument is a pulse and blood oxygen saturation measuring instrument used in medical clinics to continuously monitor surgical patients or critically ill patients. Nowadays, with the continuous improvement of people's living standards, people are more and more concerned about their own health status, and need to monitor and understand their own health indicators in a timely manner, including blood oxygen saturation data.

The existing pulse oximeter is developed according to the Lamber-Beer (Lamber-Beer) law, the principle is: the absorbance of a substance at a certain wavelength is proportional to its concentration, when the constant wavelength of light irradiates the human tissue At the same time, the light intensity measured after absorption and reflection attenuation by human tissue reflects the structural characteristics of the tissue at the irradiated part to a certain extent. Oxygenated hemoglobin (HbO2) and reduced hemoglobin (Hb) in blood have unique absorption spectra in red light and infrared light (600nm-1000nm), and the definition of blood oxygen saturation is: the ratio of oxyhemoglobin to all hemoglobin Using these features, the blood oxygen saturation of the human body can be measured. The measurement method of pulse oximetry is to transmit the red and infrared light emitted by light-emitting diodes with two wavelengths through the peripheral parts of the body (such as fingers or earlobe, etc.), and the transmitted light signal is detected by the photosensitive sensor on the opposite side, and then According to the different characteristics of red light and infrared light on the absorption rate of oxyhemoglobin and reduced hemoglobin, the detection circuit first obtains the change waveform of light absorption caused by pulsating arterial blood flow, and then calculates the pulse oxygen saturation and pulse rate accordingly value.

Existing oximeters are basically turned on and off through the panel buttons. In this way, there is a situation of forgetting to turn off the power, which causes the battery to run out quickly. For example, the patent No. 200820093742.3 proposes a way to sense whether the finger is put in by regularly starting the photoelectric detection component to realize the automatic switch. light problem. However, this automatic switch mode also has its defects: the work of the detection component is repeatedly started, which will also waste battery power to a large extent when the oximeter is in standby for a long time.

Since everyone has different habits when measuring blood oxygen saturation, the direction of observing data will also be different. This requires that the instrument can switch the display direction during measurement to adapt to the user's observation habits. At present, there are two most commonly used methods, one is to tell the processor to cut the screen by pressing the button, its patent number is 200610089152.9; the other is to use the direction sensor to obtain the current direction and inform the processor to cut the screen, its patent number is 200820093099.4 . The disadvantage of the first method is that you need to use two hands to complete the screen cut operation, and the pulse wave signal will be disturbed when you press the button, thus affecting the measurement results; although the second method is completely automatic, there is a transition state between directions. As a result, the display may switch back and forth between the two display orientations or even have no display for a long time.

With the development of science and technology, high-end pedometers that use 3D sensors for data collection are more and more popular with friends who are eager for health. It can record the number of steps you walk and the calories you burn. At the same time, some pedometers also have wired Or a wireless data interface, which can upload sports data to the computer network, so that people can view detailed data analysis on the Internet every day, every week, even every month and every year, so as to provide users with more detailed sports and health analysis, and even communicate with colleagues through the network. , friend competition interaction and other functions that encourage continuous exercise. Today, pedometers are already a very popular home health electronic product, and 3D sensors are the latest way to use them in pedometers. However, the integration of 3D sensors and pedometers is currently limited to functions such as MP3, radio, heartbeat, ultraviolet rays, and text messages, and there is no example of integrating pulse oximeter detection and pedometer functions.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the above-mentioned detection device, provide an automatic switch machine with a step counting function that is convenient to use, avoids the power consumption problem caused by forgetting to shut down, and does not actively start up to detect when it is in standby, and reduces standby power consumption. Finger clip blood oxygen saturation detection device.

The technical scheme that the utility model adopts in order to realize the above object is as follows:

A finger clip-on blood oxygen saturation detection device with pedometer function, which includes a microprocessor, a detector for detecting pulse and blood oxygen saturation, a power supply, and a display screen, and the power supplies are respectively connected to A detector, a microprocessor and a display screen, the microprocessor is connected to the detector and the display screen, and it is characterized in that: the microprocessor includes a blood oxygen module and a step counting module;

A more preferred technical solution in the utility model is that the above-mentioned microprocessor also includes a display drive module and a shaking detection module, and the microprocessor is also connected with an acceleration device for switching the display direction of the display screen in sequence after detecting the shaking of the detection device. sensor.

A further technical solution is: the device also includes an upper shell and a lower shell, and the upper shell and the lower shell are snapped together by an elastic reset member to form a shell, wherein the above-mentioned display screen and key panel are arranged on the shell , between the upper shell and the lower shell is provided with a detection port for putting in the detected human tissue, the above-mentioned microprocessor, power supply, and detector are installed in the shell composed of the upper shell and the lower shell, and the detection port is With switch.

A further technical solution is that the elastic reset part preferably adopts a return spring or a return elastic sheet;

The switch is arranged inside or outside the detection port;

The microprocessor also includes an automatic switch module;

The detector includes a red light tube, an infrared tube, a luminous tube driver for driving the red light tube and the infrared tube to work, and a sensor detection unit for receiving detection signals;

The sensor detecting unit is an optical frequency sensor.

The sensor detection unit is composed of a photoelectric sensor, a filter circuit, an amplifier circuit and an A/D conversion circuit connected in series in sequence.

The utility model has the advantages of: 1. In view of the deficiency of the direction switching modes of the display screens of the two current pulse oximeters, the display direction is switched in sequence after the pulse oximeter is detected to be shaken by acquiring the acceleration sensor signal. This method is simpler than the button-cut screen-cutting method, and can be completed with only one hand; compared with obtaining the position of the oximeter through the acceleration sensor and then cutting the screen according to the position, this method completely avoids the latter when the position of the pulse oximeter is in the In the transition state between the two states, the direction is uncertain or frequently switched between the two directions, which will cause the display screen to frequently switch between the two display modes or even appear black screen for a long time.

2. An acceleration sensor is used on the pulse oximeter, and the pedometer function is integrated, and two independent products are integrated into one product, which improves the utilization rate of the chip and reduces the cost of use.

3. Realize the function of automatic power on and off, which is convenient to use, and avoids the power consumption problem caused by forgetting to power off, and does not actively power on and detect when it is in standby, which reduces the power consumption in standby.

Description of drawings

Fig. 1 is a schematic diagram of the system structure of the utility model.

Figure 2 is a schematic diagram of the structure of the inner switch mode.

Figure 3 is a schematic diagram of the structure of the outer switch mode.

Fig. 4 is a state diagram of the utility model system.

Fig. 5 is a flow chart of the utility model system.

Fig. 6 is a schematic diagram of realizing screen display direction and mode switching according to the acceleration sensor.

Fig. 7 is a structural principle block diagram of Embodiment 1 of the utility model.

In the figure: 1-upper housing, 2-lower housing, 3-elastic reset member, 4-display screen, 5-button panel, 6-switch, 7-detection port.

Detailed ways

Below in conjunction with accompanying drawing, technical scheme of the present utility model is further described,

The utility model provides an automatic on-off finger-clamp blood oxygen saturation detection device with a step counting function, which includes an upper casing 1 and a lower casing 2, wherein the casing 1 is provided with a display screen 4 and buttons Panel 5. The upper case 1 and the lower case 2 are snapped together by an elastic return member 3 with automatic reset function such as a return spring or a return elastic sheet to form a case, and the upper case 1 and the lower case 2 are provided with a Detection port 7 for detecting human tissue. The shell composed of the upper shell 1 and the lower shell 2 is provided with a microprocessor, and the microprocessor is respectively connected to the power supply and the detector. The detector is close to the detection port 7. After the human tissue is put into the detection port, the detection of the detector will be more direct. precise. The microprocessor includes a blood oxygen module for blood oxygen saturation measurement, a pedometer module with a pedometer function, and the microprocessor is also connected to a device for switching the display screen in sequence after detecting that the detection device is shaken. The acceleration sensor of the direction, the inside or outside of the detection port 7 is provided with a switch 6. The microprocessor may also include an automatic switch module, a shake detection module and a display driver module. The above-mentioned detector specifically includes a red light tube, an infrared tube, a light-emitting tube driver for driving the red light tube and the infrared tube to work, and a sensor detection unit for receiving detection signals. The detection unit is composed of a photoelectric sensor, a filter circuit, an amplifier circuit and an A/D conversion circuit connected in series in sequence, or an optical frequency sensor is directly used. The above-mentioned sensor detection unit is used to receive the detection signal fed back from human tissue. This signal acquisition unit can be an optical frequency sensor or a photoelectric sensor. If a photoelectric sensor is used, a filter circuit, an amplification circuit and an A/D conversion circuit should be added. , filter circuit, amplifier circuit and A/D conversion circuit are serially connected in sequence, and the output end of the A/D conversion circuit is connected to the detection signal input port of the microprocessor, so as to send the processed detection signal to the microprocessor.

The above-mentioned power management is used to provide electric energy for the pulse oximeter and control the electric energy output.

The display screen is mainly used to display the measurement results, and various existing display screens or displays can be used, such as LED displays, LCD displays, etc.;

The button panel is used to provide manual switch signal for the system;

The switch is used to provide an automatic switch signal for the pulse oximetry detection mode of the system. It is divided into two ways, one is the inner switch, which is used to be triggered by a finger; the other is a side switch, which is used when the finger is put in The upper and lower casings are opened to trigger.

The acceleration sensor mainly acquires the acceleration in all directions, and transmits the data to the microprocessor through the digital interface.

The microprocessor includes an automatic switch module, a blood oxygen module, a pedometer module, a shaking detection module and a display driver module.

Embodiment 1: As shown in Figure 7, a finger-clip blood oxygen saturation detection device with a step counting function, which includes a microprocessor, a detector for detecting pulse and blood oxygen saturation, and a power supply , a display screen, the power supply is respectively connected to the detector, the microprocessor and the display screen, the microprocessor is connected to the detector and the display screen, and the microprocessor includes a blood oxygen module, a pedometer module, a display drive module and a shake detection module module, and the microprocessor is also connected with an acceleration sensor for sequentially switching the display direction of the display screen after detecting the shaking of the detection device. In this way, after the above-mentioned components are connected, the basic pulse and blood oxygen saturation detection and pedometer functions can be realized by bringing the human tissue close to the detector, and the acceleration sensor and the shaking detection module can realize the switching of the screen display direction. Function.

Embodiment 2: As shown in Figures 1 and 2, in the present utility model, the power supply end of the microprocessor is directly connected to an electric energy output end of the power supply, so that the microprocessor has power supply all the time, and ensures that it works in standby mode. In the utility model, an inner switch is adopted to be used for automatic switching, and this function does not affect the manual switching of the button panel. When the inner switch is used to realize automatic power on and off, after the system is powered on, the microprocessor turns off the display screen and the detector drive circuit, and enters the standby mode. When the human body tissue (such as a finger) is put in, it will touch the inner switch (as shown in Figure 2), a trigger signal is generated and sent to the automatic switch module of the microprocessor. In standby mode, receiving this trigger signal will wake up the system and turn on the detector drive circuit and display screen, and enter the working mode. In working mode, receiving this trigger signal will cause the microprocessor to turn off the display screen and the detector driving circuit again, and enter into a low-power standby mode.

Embodiment 3: As shown in Figures 1 and 3, when the external switch is used to realize the automatic switching machine, the automatic switching machine principle is: after the system is powered on, the microprocessor closes the display screen and the detector drive circuit, and enters the standby mode. When the finger is put in, the upper and lower casings are opened, causing the outer switch to be triggered, which generates a trigger signal and transmits it to the automatic switch module of the microprocessor. Receiving this trigger signal in standby mode will wake up the system and turn it on The detector driving circuit and the display screen enter the working mode, and receiving the trigger signal in the working mode will cause the microprocessor to turn off the display screen and the detector driving circuit again, and enter a low-power standby mode. Using the above method to realize automatic power on and off, the system does not need regular active detection, which can greatly reduce standby power consumption.

As shown in Figure 4, the utility model system is divided into three states, including: standby state, blood oxygen state and step counting state. Among them, the blood oxygen state is the working state of calculating the blood oxygen saturation, and the step counting state is the working state of calculating the number of steps and other related data. It can only enter one working state every time it is turned on. When it needs to enter another working state, it must first exit the current working state and enter the standby state. The details of the system status and operation are as follows:

Power on the system and enter standby mode.

If you put your finger in and trigger the inner (outer) side switch, the system will automatically turn on and enter the blood oxygen mode, calculate the equivalent value of blood oxygen saturation, and display the relevant calculation results.

In the blood oxygen mode, shaking the instrument makes the acceleration sensor obtain a valid signal, through which the screen display direction and mode can be switched. The relationship between the acceleration sensor signal and the display direction switching is shown in Figure 6.

If no finger is detected for 8 seconds, the system enters standby mode.

If you continue to press the panel button for more than 3 seconds, the system will turn on and enter the step counting mode, calculate the equivalent value of the number of steps, and display the relevant calculation results.

In the pedometer mode, insert a finger, and the system display will prompt the correct operation method and steps to enter the blood oxygen mode.

Keep pressing the panel button for more than 3 seconds, the system enters standby mode.

Its operation flow chart is shown in Figure 5. Specifically:

1. After power on, the system enters standby mode;

2. If the touch switch signal is valid, the system will wake up from the standby mode and power on to enter the blood oxygen mode; at this time, if the panel button is pressed for 3 seconds, the system will wake up from the standby mode and power on to enter the pedometer mode;

3. In the blood oxygen mode, if the acceleration sensor signal is detected to have shaking characteristics, switch the display direction or display mode of the display;

4. In the blood oxygen mode, if you keep pressing the button on the panel for 3 seconds or the touch switch signal remains inactive for 8 seconds, the blood oxygen mode will end and enter the standby mode;

5. In the pedometer mode, if the touch switch signal is valid and a finger is detected, the display will prompt the method and specific steps to enter the blood oxygen mode;

6. In the pedometer mode, if the panel button is pressed for 3 seconds, the pedometer mode will end and enter the standby mode.

Figure 6 is an example of using the acceleration sensor to switch the screen display mode in the blood oxygen mode. The signal waveform in the figure is the acceleration sensor signal, which can be the X direction or Y direction of the one-dimensional acceleration sensor signal or the two-dimensional acceleration sensor signal and their composite signals, or the X, Y or Z direction of the three-dimensional acceleration sensor and their synthetic signal. The shaking feature is detected at the position of the vertical line in the figure, and the display mode is switched to the next mode in sequence immediately after the shaking feature is detected. Assuming that there are four display modes in total, the display modes are cyclically switched among the four modes sequentially after the shaking signal is detected. Of course, there are many ways to obtain shaking features, and this is just an example of the simplest way.

In summary, the utility model integrates the functions of the oximeter and the pedometer, and the acceleration sensor is used for both the step counting function of the pedometer and the display mode switching function of the oximeter. best value. In this implementation, the inner (outer) side switch is used to passively detect whether there is a finger put in, which not only realizes the automatic switch function, but also does not need to be turned on regularly to actively detect during standby, which greatly reduces the waste of power consumption caused by long-term standby .

Therefore, the utility model proposes to use the acceleration sensor to detect the shaking of the instrument. As long as the shaking is detected, the screen cut operation will be performed. After the pulse oximeter is worn on the finger, the finger will generally be shaken horizontally. The influence on the signal when shaking horizontally is far less than that of shaking vertically, so the method of the utility model can well avoid the influence on the pulse wave signal when the screen is cut and cause errors in the calculation results; in addition, the utility model can completely avoid The uncertainty caused by the transition state between directions and the long-term black screen problem are solved. The utility model adopts the acceleration sensor to realize the screen cutting function when the blood oxygen saturation is measured. In order to make full use of the 3D acceleration sensor, the pedometer function can be added on the basis of the pulse blood oxygen detector without any modification on the hardware, which is very convenient. It improves the use of consumers and reduces the cost of use.

Claims (9)

1. A finger clip-on blood oxygen saturation detection device with pedometer function, which includes a microprocessor, a detector for detecting pulse and blood oxygen saturation, a power supply, a display screen, and the power supply The detector, the microprocessor and the display screen are respectively connected, and the microprocessor is connected to the detector and the display screen, and the microprocessor is characterized in that: the microprocessor includes a blood oxygen module, a step counting module, and a display driving module. 2. According to claim 1, the automatic on/off finger-clamp blood oxygen saturation detection device with step counting function is characterized in that: the microprocessor also includes a shaking detection module, and the microprocessor is also connected with a An acceleration sensor that sequentially switches the display direction of the display after detecting the shaking of the detection device. 3. According to claim 1, the finger-clip blood oxygen saturation detection device with pedometer function that can be automatically turned on and off is characterized in that: the microprocessor also includes an automatic on-off module. 4. According to claim 1, 2 or 3, a finger-clamp blood oxygen saturation detection device with pedometer function that can be automatically switched on and off, characterized in that: the device also includes an upper shell (1) and a lower shell ( 2), the upper casing (1) and the lower casing (2) are snapped together by the elastic reset member (3) to form a casing, wherein the casing (1) is provided with the above-mentioned display screen (4) and key panel ( 5), between the upper shell (1) and the lower shell (2) is provided with a detection port (7) for putting in the detected human tissue, and the above-mentioned microprocessor, power supply, and detector are installed in the upper shell (1) In the casing composed of the lower casing (2), the detection port (7) is provided with a switch (6). 5. A finger-clamp type blood oxygen saturation detection device with step counting function according to claim 4, characterized in that the elastic reset member (3) is a reset spring or a reset elastic sheet. 6. A finger-clip blood oxygen saturation detection device with a pedometer function and an automatic switch according to claim 4, characterized in that the switch (6) is set inside or outside the detection port (7). 7. A finger-clamp blood oxygen saturation detection device with a step counting function according to claim 4, characterized in that the detector includes a red light tube, an infrared tube, and is used to drive a red light The driver of the light-emitting tube that works with the tube and the infrared tube, and the sensor detection unit for receiving the detection signal. 8. A finger-clip blood oxygen saturation detection device with pedometer function that can be automatically switched on and off according to claim 7, characterized in that the sensor detection unit is an optical frequency sensor. 9. A finger-clamp blood oxygen saturation detection device with a pedometer function according to claim 7, characterized in that the sensor detection unit consists of a photoelectric sensor, a filter circuit, and an amplifier circuit connected in series in sequence and A/D conversion circuit.

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