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WO2006119666A1 - Capteur sans fil et procede de transmission de signal et application associee - Google Patents

Capteur sans fil et procede de transmission de signal et application associee Download PDF

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Publication number
WO2006119666A1
WO2006119666A1 PCT/CN2005/000646 CN2005000646W WO2006119666A1 WO 2006119666 A1 WO2006119666 A1 WO 2006119666A1 CN 2005000646 W CN2005000646 W CN 2005000646W WO 2006119666 A1 WO2006119666 A1 WO 2006119666A1
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WO
WIPO (PCT)
Prior art keywords
digital signal
wireless sensing
sensing unit
time slot
wireless
Prior art date
Application number
PCT/CN2005/000646
Other languages
English (en)
Chinese (zh)
Inventor
Tien-Cheng Huang
Original Assignee
Holbright Weighing Systems Co., Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Holbright Weighing Systems Co., Ltd filed Critical Holbright Weighing Systems Co., Ltd
Priority to PCT/CN2005/000646 priority Critical patent/WO2006119666A1/fr
Publication of WO2006119666A1 publication Critical patent/WO2006119666A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable

Definitions

  • the present invention relates to a wireless sensing unit and a method for collecting signal transmission thereof, and more particularly to an analog unit that repeatedly transmits a digital signal representing its sensed value in a single direction at different frequencies in a plurality of specific time slots.
  • the wireless network of home and small and medium-sized enterprises adopts the IEEE 802.11 wireless local area network standard, and its physical layer (PHY) transmission technology is generally divided into IEEE 802. lib and IEEE 802.11a.
  • the IEEE 802. lib data rate includes 1, 2, 5 ⁇ 5 and 11 Mbps, and the frequency band used is 2.4 GHz to 2. 4835 GHz. In this frequency band, 14 partially overlapping channels (channel s) are planned. Considering the problem of inter-channel interference, up to three mutually exclusive channels can be used simultaneously without interference.
  • the IEEE 802.11a data rate includes 6, 12, 18, 24, 36, 48, and 54 Mbps, and the frequency band is 5.15 GHz to 5.35 GHz and 5. 725 GHz to 5. 825 GHz, where There are 12 channels.
  • the foregoing conventional wireless communication device is a "many-to-many" transmission relationship. To ensure that a large number of busy wireless signal packets in a space are not mis-transmitted, misreceived, reversed, or lost, each signal packet must pass through. Filtering and returning for two-way confirmation are considered complete, and the process is quite complicated. Compared with the transmission and collection of various sensor data, such as laboratories, factories, incinerators, weighbridge stations, barrel scales, etc., it is a "many-to-one" or "one-to-many” transmission relationship, and it is barely applicable to the above tradition.
  • the wireless communication device and method seem to be unnecessary, and the user's wireless network environment is interfering with factors, unable to reduce components and reduce installation costs. For this reason, for the wireless transmission of sensing elements and the collection of data, it is advisable to further develop a simpler and more reliable signal transmission method. Summary of the invention
  • the main object of the present invention is to provide a wireless sensing unit capable of directly performing digitization of its sensing value and clock synchronization and transmission of a wireless signal directly in advance.
  • the plurality of time slots are allocated, and the different frequencies are switched to unidirectionally and repeatedly transmit digital signals for a remote receiver to collect, store, calculate, print or display in a "one-to-many" transmission relationship.
  • a sensor, an analog/digital signal converter and a transceiver can be installed by using the same body; wherein the sensor is connected to the analog/digital signal converter.
  • the sensor For converting the sensed value on the sensor into a digital signal, and after synchronizing the clock with a remote receiver, repeating the unidirectional repetition at different frequencies in the pre-scheduled time slot.
  • the terminal receiver receives the signal in a "one-to-many,” transmission relationship.
  • the remote receiver uses the time slot in which the signal is received to identify individual signal sources, and then stores, computes, prints, and displays the digital signals separately.
  • the wireless sensing unit can repeat the one-way wireless transmission signal in a one-to-many or many-to-one manner, which is simple and reliable, can reduce the installation cost of the device, and is suitable for laboratories, factories, incinerators, floor scale stations, barrel scales and Other uses require remote receivers to collect values from different sensor readings.
  • FIG. 1 is a block diagram showing the steps of a signal transmission method of the present invention
  • FIG. 3 is a schematic diagram and a block diagram of a wireless sensing unit implemented by the present invention applied to a weighbridge station;
  • FIG. 4 is a schematic diagram of a configuration of a wireless sensing unit applied to a weighbridge station according to the present invention
  • FIG. 5 is a schematic structural view of a wireless sensing unit applied to a load cell according to the present invention
  • FIG. 6 is a wireless sensing unit application implemented by the present invention.
  • FIG. 7 is a schematic diagram of the configuration of the wireless sensing unit applied to the barrel scale or the barrel bin according to the present invention;
  • FIG. 8 is a schematic diagram of a remote receiver configured by a wireless sensing unit implemented by the present invention.
  • the wireless sensing unit signal transmission method of the present invention includes the following processing steps:
  • a time slot of a wireless sensing unit is allocated, and the clock pulse of the transceiver is The clock pulse of a remote receiver is synchronized.
  • Each wireless sensing unit can be assigned a plurality of time slots, such as a first predetermined time slot, a second predetermined time slot, a third predetermined time slot, and an nth predetermined time slot.
  • the sensing value of the wireless sensing unit is converted into a digital signal.
  • the sensed value may be a value representing a load, a temperature, a pressure, a displacement, a chemical concentration, or other optical, electrical (voltage, current) or physical state (illuminance), depending on the sensing of the wireless sensing unit. Depending on the function of the device.
  • step A3 the digital signal is transmitted at the first transmission frequency in the first predetermined time slot.
  • step A4 the digital signal is retransmitted at the second predetermined frequency slot at the second transmission frequency.
  • step A5 the digital signal is retransmitted at the third predetermined frequency slot at the third transmission frequency. And so on, the digital signal is retransmitted at the nth transmission frequency at the nth predetermined time slot in the An step. With each retransmission, the frequency in the space is prevented from interfering with the reception of the remote receiver.
  • the remote receiver can perform the following steps in a one-to-many manner:
  • step A6 the remote receiver is reset to zero to receive digital signals from different wireless sensing units from each time slot in a one-to-many manner.
  • step A8 the source of the digital signal is identified according to the time slot, and the digital signal is stored to cover the previous digital signal with a new arrival.
  • a comparison step A7 can be added between the steps A6 and A8 to compare the digital signals transmitted from the time slots of the same sensor. If the new arrival is the same as the previous digital signal, it should be discarded or ignored. The newly arrived digital signal is not stored.
  • FIG. 2 an embodiment of a remote receiver 30 is illustrated in a one-to-many manner in pre-assigned time slots T00, Tl l, T12, T13, T14 ⁇ 21, ⁇ 22, ⁇ 23, ⁇ 24 ⁇ 31,
  • ⁇ 32, ⁇ 33, ⁇ 34 perform the above steps of transmitting signals, wherein the time slot TOO synchronizes the clock pulses of the transceivers of each of the wireless sensing units 20A, 20B, 20C and 20D with the clock pulses of a remote receiver. Then, the time slots T1 l, T21, T31 are allocated for the wireless sensing unit 20 to transmit its digital signal LSI, and the time slots T12, ⁇ 22, ⁇ 32 are allocated for the wireless sensing unit 20 to transmit its number.
  • the foregoing wireless sensing units 20A, 20B, 20C, and 20D may be loaded with a load cell (LOAD CELLS) device at a scale station 10, when performing the weighbridge, respectively.
  • the digital signals LS1, LS2, LS3, and LS4 representing the individual loads are transmitted, and the unidirectional transmission is repeated to the remote receiver 30 through a preset time slot.
  • the remote receiver 30 performs the B1 step to receive the digital signals LS1, LS2, LS3 of the different frequencies transmitted by the respective wireless sensing units 20A, 20B, 20C and 20D in each time slot in a one-to-many manner.
  • LS4 performing step B2, each of the digital signal to identify the time slots assigned by LSI, LS2, LS3 and LS4 of the source, respectively, for the storage or update the wireless sensor units 20A, 20B, 20C and a load of 2 0D sensing value Wl , , W3 and W4;
  • step B3 summing the load sensing values Wl, W3, and W4 to become the pounding result W of the weighbridge station.
  • the wireless sensing unit application of the present invention is illustrated by taking a load cell 20 as an example.
  • a load sensor 21 and a digital transceiver 22 are mounted in the same body.
  • the digital transceiver T1 can be composed of an analog/digital signal converter 221 and a transceiver 222.
  • the load sensor 21 is connected to the analog/digital signal converter 221 for converting the load reading value on the load sensor 21 into a digital signal, and after synchronizing the clock with the remote receiver 30,
  • the pre-assigned time slot repeatedly plays the load-reading digital signal in one direction and at different frequencies. Repeat the broadcast with different frequencies to prevent the frequency receiver of the environment from affecting the reception of the remote receiver 30.
  • the remote receiver 30 will be able to collect and discern digital signals from different load cells 20 in a one-to-many manner and then store, calculate, print or display.
  • the use of the wireless sensing unit of the present invention includes, but is not limited to, the load unit 20, such as replacing the load sensor 21 with a temperature sensor, a chemical concentration sensor, or detecting other physical and optical states.
  • the detector is also available.
  • the power of the wireless sensing unit can be general commercial power, or it can be supplemented or replaced by wind energy, solar energy, fuel cells or other new energy sources. As shown in Figure 6, The solar power generation device 50 converts sunlight into electric energy, and the battery 51 stores the power supply to the wireless sensing units 20A, 20B of the platform 10 in the figure.
  • the storage device is connected to the bracket 41 to sense the load change wireless sensing unit 20A, 20B, 20C, 20D, 20E, 20F, which is sent to the remote receiver 30 for storage, calculation, printing or according to the signal transmission method of the present invention. Display and other processing and application.
  • the remote receiver 30 can include a wireless signal receiver 31, a digital signal processor 32, and an output device 33.
  • the wireless signal receiver 31 distinguishes digital signals from different wireless sensing units by using different time slots, and outputs them by the output device 33 after arithmetic processing.
  • the output device 33 can be a printer, a digital weight display, a screen or an e-mail device or a network connection device.
  • the processing results of the digital signal processor 32 can also be loaded or directly loaded with the electronic storage medium 34, including a hard disk for a computer, a magnetic disk, a magnetic tape, a recordable optical disk, or a removable memory.
  • the wireless sensing unit of the present invention repeatedly plays its sensing signals unidirectionally in different time slots at different frequencies, which is different from the traditional many-to-many wireless communication protocol, and the simple and reliable wireless transmission mode. It is especially suitable for use in laboratories, factories, incinerators, weighbridges, tanks and other applications where remote sensors need to be used to collect readings from different sensors.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

Un type de capteur sans fil est obtenu à partir d'un capteur, d'un convertisseur de signal analogique/numérique et d'un émetteur récepteur, tous sont fixés sur le même bloc moteur. Comme le capteur est connecté au convertisseur de signal analogique/numérique, il convertit la valeur sensible du capteur en signal numérique et après que le récepteur éloigné termine la synchronisation d'horloge, il répète la reproduction du signal numérique dans une seule direction à un créneau temporel prédéterminé par commutation de différentes fréquences. Entre temps, le récepteur éloigné reçoit le signal en provenance de différents capteurs sans fil en un à plusieurs modes et identifie la source de signal individuel au moyen de l'attribution d'un créneau temporel du signal reçu. Par la suite, il stocke séparément, met en marge, imprime et affiche ces signaux numériques. Ce capteur sans fil peut répéter la reproduction du signal dans une seule direction à différentes fréquences, obtenir simplement et fiablement le mode de transmission sans fil, être directement utilisé dans un laboratoire, une usine, un incinérateur, une balance à plateau plat, une balance et toute autre installation nécessitant la collecte de différentes valeurs captées au moyen du récepteur éloigné.
PCT/CN2005/000646 2005-05-10 2005-05-10 Capteur sans fil et procede de transmission de signal et application associee WO2006119666A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/000646 WO2006119666A1 (fr) 2005-05-10 2005-05-10 Capteur sans fil et procede de transmission de signal et application associee

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/000646 WO2006119666A1 (fr) 2005-05-10 2005-05-10 Capteur sans fil et procede de transmission de signal et application associee

Publications (1)

Publication Number Publication Date
WO2006119666A1 true WO2006119666A1 (fr) 2006-11-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2005/000646 WO2006119666A1 (fr) 2005-05-10 2005-05-10 Capteur sans fil et procede de transmission de signal et application associee

Country Status (1)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5986646A (en) * 1997-07-22 1999-11-16 Ace Cad Enterprise Co., Ltd. Method and apparatus for finding the location of a pointing instrument on a tablet
CN1300386A (zh) * 1998-05-15 2001-06-20 瓦马特拉法格有限公司 多点数字温度控制器
CN1462007A (zh) * 2002-02-07 2003-12-17 康巨科技股份有限公司 生物体电信号数据采集器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5986646A (en) * 1997-07-22 1999-11-16 Ace Cad Enterprise Co., Ltd. Method and apparatus for finding the location of a pointing instrument on a tablet
CN1300386A (zh) * 1998-05-15 2001-06-20 瓦马特拉法格有限公司 多点数字温度控制器
CN1462007A (zh) * 2002-02-07 2003-12-17 康巨科技股份有限公司 生物体电信号数据采集器

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