CN100342221C - Pure passive wireless automatic meter recording system using sound surface wave technology - Google Patents
Pure passive wireless automatic meter recording system using sound surface wave technology Download PDFInfo
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- CN100342221C CN100342221C CNB2005101109958A CN200510110995A CN100342221C CN 100342221 C CN100342221 C CN 100342221C CN B2005101109958 A CNB2005101109958 A CN B2005101109958A CN 200510110995 A CN200510110995 A CN 200510110995A CN 100342221 C CN100342221 C CN 100342221C
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Abstract
The present invention relates to a purely passive, wireless and automatic meter reading system by using surface acoustic wave technology, and belongs to the technical field of wireless transmission, which comprises a magnetic sensor array, a surface acoustic wave member, a wireless reading and inquiring machine and a computer control center. The magnetic sensor array electrically connected with the surface acoustic wave member collects position states of mechanical character wheels of meters. The position states are converted into electrical short circuit and broken circuit states. The information of the electrical short circuit and broken circuit states is used as the information input of a module of the surface acoustic wave member. The wireless reading and inquiring machine receives wireless wave signals of the information containing meter values, codes, etc. transmitted by the surface acoustic wave member. The wireless reading and inquiring machine carries out amplification, filtering and analog-digital conversion on the received wireless wave signals. The computer control center reads the information of meter numbers and valves from the wireless reading and inquiring machine. The present invention can carry out purely wireless and passive reading on meters, decrease wiring complexity and save cost.
Description
Technical field
What the present invention relates to is a kind of system of radio transmission technical field, specifically, is a kind of pure passive wireless automatic meter recording system that adopts surface acoustic wave techniques.
Background technology
At present, the counting structure of mechanical character wheel mode is widely used on water meter, ammeter, gas meter etc. and other accumulative total formula gauging tables, because it is simple in structure, and low price, reliable operation all is an irreplaceable metering method in recent years.In the above-mentioned table tool, all being made up of some character wheels, all is the mechanical reading mode.Along with the development of technology, need to have proposed these mechanical hook-ups to give the top level computer system with remote transmission with electronization, digitized form output metering result's requirement, be convenient to statistics and management.
Find through literature search prior art, Chinese patent publication number CN1460841A, open day is 2003.12.10, patent name is: the water meter Automatic meter reading system that adopts imageing sensor, this patent readme is: " system is by camera system; the water meter image acquisition; compression; storage system; and meter reading recognition system three parts constitute; and the collection of camera system and water meter image, compression, adopt data line or video line to connect between the storage system, and carry out signal transmission, the water meter image acquisition, compression, be that communication interface connects and data transmission between storage system and the meter reading recognition system, the dial plate image of camera system picked-up water meter, the digital signal or the vision signal of institute's pickup image, by the water meter image acquisition, compression, storage system is gathered, compression and storage, then all images of storage is sent to the meter reading recognition system and concentrate and to carry out the automatic identification of reading, draw and write down the water metering value of water meter." its weak point is: 1. system all is wired, which kind of table tool no matter, where all be installed on needs signal transmssion line and power lead.2. system all requires outside or inside (battery) power supply, does not have power supply all can not work.3. his-and-hers watches tool itself does not have the ID code capacity, can only lean on Data Transport Protocol or other indirect methods corresponding with user profile table tool reading.4. every cover reading system can only read the numerical value of a table tool, and cost is higher.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of pure passive wireless automatic meter recording system that adopts surface acoustic wave techniques is provided, make it carry out pure wireless, passive reading by his-and-hers watches tool, every cover is wireless, and the reading inquiry machine can wirelessly read a plurality of table tools in the sub-district, reduce the wiring complexity, save cost.
The present invention includes: the magnetic sensor row, SAW (Surface Acoustic Wave) device, wireless reading inquiry machine and computer controlling center, the location status of the magnetic sensor row acquisition tables tool mechanical character wheel that is electrically connected with SAW (Surface Acoustic Wave) device, location status is converted to short circuit and off state on electric, short circuit on electric and off state information are as the information input of SAW (Surface Acoustic Wave) device module, the radiowave of SAW (Surface Acoustic Wave) device module output sends to wireless reading inquiry machine module with wireless mode, wireless reading inquiry machine sends request signal with the radiowave form to SAW (Surface Acoustic Wave) device, and receive that SAW (Surface Acoustic Wave) device sends comprise table tool numerical value, the radio wave signal of information such as coding, wireless reading inquiry machine amplifies the radio wave signal that receives, filtering, analog-digital conversion, and decoding obtains showing tool numbering and numerical information, and computer controlling center reads table tool numbering and numerical information from wireless reading inquiry machine.
Described magnetic sensor row comprise: encoder magnet and reed capsule, encoder magnet adopt scale-of-two specific coding method to arrange, and the current numerical value of table tool is reflected on the attracting state of reed capsule in binary mode.
Described encoder magnet is located on the table tool mechanical character wheel, rotates with table tool mechanical character wheel.
Described reed capsule is located on the table tool pedestal, and the attracting state of reed capsule sends SAW (Surface Acoustic Wave) device to by short circuit on electric and off state.
Described SAW (Surface Acoustic Wave) device comprises: the device matrix, antenna, interdigital transducer, reading reflecting grating array and coding reflecting grating array, antenna receives the request signal of wireless reading inquiry machine emission, and send from the table tool that comprises of interdigital transducer and encode, the answer signal of numerical information is to wireless reading inquiry machine, interdigital transducer is converted to acoustic signals to the request signal (electromagnetic wave) that antenna receives, propagate along the device matrix surface, interdigital transducer is converted to the acoustic signals of reflected back electromagnetic wave signal and sends antenna to simultaneously, the reading reflecting grating array that is positioned on the acoustic wave propagation path is arranged with the fixed position, reading reflecting grating array receives from interdigital transducer and propagates the acoustic signals of coming, and reflected back has the echoed signal of table tool numerical information, the coding reflecting grating array that is positioned on the acoustic wave propagation path receives the acoustic signals that the interdigital transducer propagation is come, and reflected back is by the table tool coding of the coding decision of dispatching from the factory, as the identification number of distinguishing the different table tool.
Described wireless reading inquiry machine comprises: community antenna, radiating circuit, receiving circuit, digital decoding circuit and control circuit, radiating circuit is launched request signal to community antenna according to the control of control circuit, the electromagnetic wave signal that the community antenna emission comes from radiating circuit, and receive the signal that returns by antenna on the SAW (Surface Acoustic Wave) device, then this signal is sent to receiving circuit, receiving circuit amplifies the signal that receives, filtering, frequency conversion, send the digital decoding circuit after the demodulation to, the digital decoding circuit carries out the conversion of analog to digital to the signal that receives, through digital filtering, obtain showing tool numerical value and table tool numbering after the decoding, preserve numerical value and be sent to computer controlling center.
Described computer controlling center is to wireless reading inquiry machine transmitting control commands, and receives the table tool numerical information that wireless reading inquiry machine sends, aggregation process.
The course of work of the present invention and principle of work are: the moving encoder magnet that is mounted thereon that drives rotated when the mechanical character wheel of table tool changeed, the variation of encoder magnet position changes the attracting state that is installed near the reed capsule of magnet, thereby the channel status of the reading reflecting grating that is attached thereto is changed, and the change of this state makes the reading reflecting grating that different reflection characteristics be arranged when reflective sound wave.When hand-held or hard-wired wireless reading inquiry machine when radiating circuit sends request signal, antenna on the SAW (Surface Acoustic Wave) device receives signal, and signal is sent on the interdigital transducer that is electrically connected with it, the conversion of electric wave to sound wave takes place on interdigital transducer, the sound wave that obtains produces different reflection characteristics along running into the different reading reflecting grating array of channel status in the matrix communication process, the numerical information that has comprised the table tool like this in the sound wave of reflected back, the inverse conversion of sound wave to electric wave takes place in reflection wave on interdigital transducer, and launches through antenna.Wireless reading inquiry machine obtains showing the tool reading value by receiving the electric wave signal of reflected back after decoding.Coding reflecting grating on the SAW (Surface Acoustic Wave) device also produces reflection to request signal simultaneously, utilizes time, amplitude, phase propetry can distinguish the identification number of current table tool like this in return signal.Behind the wireless reading inquiry machine emission request signal, transfer receiving state signal to, receiving circuit carries out pre-service to the received signal, obtains showing current reading value of tool and numbering through decoding algorithm.Computer controlling center is preserved and be sent to the control that the control circuit control of wireless reading inquiry machine is finished inquiry, received the decode to the information that obtains simultaneously.Computer center can collect the read data of the wireless enquiry machine that is distributed in each place by wired or wireless mode, and aggregation process.
Advantage of the present invention is: 1. the transducing part of table tool is pure passive, just can finish without any need for power supply the detection of mechanical character wheel numerical value.2. the transmission of numerical information is wireless on the table tool, just can read numerical value without any need for the wired connection with the table tool.3. table tool itself has fixing and unique identification number given when making, and the typing in the lump when the numerical value typing of this number does not need special communications protocol or other method to distinguish the user.4. table tool coding is an absolute encoding, does not have accumulated error.5. have mechanical reading and electronical reading, and keep in full accord, the electronical reading device does not influence the metering of original primary instrument.
Description of drawings
Fig. 1 is a principle of the invention block diagram.
Fig. 2 is the SAW (Surface Acoustic Wave) device structural representation.
Fig. 3 is wireless reading inquiry machine structured flowchart.
Embodiment
As Fig. 1,2, shown in 3, the present invention includes: the magnetic sensor row, SAW (Surface Acoustic Wave) device, wireless reading inquiry machine and computer controlling center, the location status of the magnetic sensor row acquisition tables tool mechanical character wheel that is electrically connected with SAW (Surface Acoustic Wave) device, location status is converted to short circuit and off state on electric, short circuit on electric and off state information are as the information input of SAW (Surface Acoustic Wave) device module, the radiowave of SAW (Surface Acoustic Wave) device module output sends to wireless reading inquiry machine module with wireless mode, wireless reading inquiry machine sends request signal with the radiowave form to SAW (Surface Acoustic Wave) device, and receive that SAW (Surface Acoustic Wave) device sends comprise table tool numerical value, the radio wave signal of information such as coding, wireless reading inquiry machine amplifies the radio wave signal that receives, filtering, analog-digital conversion, and decoding obtains showing tool numbering and numerical information, and computer controlling center reads table tool numbering and numerical information from wireless reading inquiry machine.
Described magnetic sensor row and SAW (Surface Acoustic Wave) device all are located at table tool inside, and the magnetic sensor row comprise and are located at mechanical character wheel reed capsule 1 on every side, are located at the encoder magnet 2 on the character wheel rotatable parts.Encoder magnet 2 is arranged according to absolute addressing mode, and the present invention also is applicable to other coding arrangement.Adopt four specific coding among the present invention, have 16 kinds of states to identify ten numerals of 0-9.Around each character wheel four magnetic red pipes 1 are installed, it is corresponding with the circumference on four code-wheels.When mechanical character wheel turned to diverse location, magnetic force made reed capsule 1 produce different closure state combinations.The output lead 3 of reed capsule 1 is connected to the reading reflecting grating array 4 on the SAW (Surface Acoustic Wave) device.SAW (Surface Acoustic Wave) device comprises device matrix 5, antenna 6, interdigital transducer 7, reading reflecting grating array 4 and coding reflecting grating array 8.Antenna 6 receives the request signal that wireless reading inquiry machine sends, and is sent to interdigital transducer 7.Interdigital transducer 7 is converted to acoustic signals to the electric wave signal that antenna 6 receives, and propagates along matrix 5 surfaces, and interdigital transducer 7 also reverses the sound wave by reading reflecting grating array 4, coding reflecting grating 8 reflected backs and is changed to electric wave signal, is transmitted back to antenna 6.Reading reflecting grating array 4 is electrically connected with reed capsule 1, thereby, the on off operating mode of reed capsule 1, be converted to the short circuit or the off state of reading reflecting grating array 4, the reflection characteristic of the 4 pairs of sound waves of reading reflecting grating under the two states is different, thereby is the magnetic switch conversion of signals of expression table tool numerical value the power of reflective sound wave.Comprise of the acoustic-electric conversion of the signal of reading value information, launch by antenna 6 through above-mentioned interdigital transducer 7.The arrangement position of coding reflecting grating 8 realizes that according to the specific coding method encoding state produces, and can not revise when producing.Like this in echoed signal, can detect the coding of coding reflecting grating 8 by information such as amplitude, phase place, times, with this one number as the table tool.
As shown in Figure 3, described wireless reading inquiry machine is a wireless work system, by community antenna, radiating circuit, receiving circuit, digital decoding and control circuit are formed, and radiating circuit is transported to digital decoding and control circuit according to query statement after community antenna emission request signal receiving circuit is nursed one's health the reflected signal that returns from community antenna.Digital decoding and control circuit calculate digitized received signal, obtain the numerical value and the Table I D number of current question blank tool, and deposit corresponding database in, and the communication interface of data processing section can be communicated by letter with main control computer.
Described computer controlling center is positioned at the administrative center in living quarters, is connected with the wireless reading inquiry machine of each unit by communication interface, and each cell data is gathered, and the central database software data processing is printed the statement of expense, and the uniform dispatching system.
Claims (6)
1. pure passive wireless automatic meter recording system that adopts surface acoustic wave techniques, comprise: computer controlling center, SAW (Surface Acoustic Wave) device, the magnetic sensor row, it is characterized in that, also comprise: wireless reading inquiry machine, the location status of the magnetic sensor row acquisition tables tool mechanical character wheel that is electrically connected with SAW (Surface Acoustic Wave) device, location status is converted to short circuit and off state on electric, short circuit on electric and off state information are as the information input of SAW (Surface Acoustic Wave) device module, the radiowave of SAW (Surface Acoustic Wave) device module output sends to wireless reading inquiry machine module with wireless mode, wireless reading inquiry machine sends request signal with the radiowave form to SAW (Surface Acoustic Wave) device, and receive that SAW (Surface Acoustic Wave) device sends comprise table tool numerical value, the radio wave signal of coded message, wireless reading inquiry machine amplifies the radio wave signal that receives, filtering, analog-digital conversion, and decoding obtains showing tool numbering and numerical information, and computer controlling center reads table tool numbering and numerical information from wireless reading inquiry machine;
Described wireless reading inquiry machine comprises: community antenna, radiating circuit, receiving circuit, digital decoding circuit and control circuit, radiating circuit is launched request signal to community antenna according to the control of control circuit, the electromagnetic wave signal that the community antenna emission comes from radiating circuit, and receive the signal that returns by antenna on the SAW (Surface Acoustic Wave) device, then this signal is sent to receiving circuit, receiving circuit amplifies the signal that receives, filtering, frequency conversion, send the digital decoding circuit after the demodulation to, the digital decoding circuit carries out the conversion of analog to digital to the signal that receives, through digital filtering, obtain showing tool numerical value and table tool numbering after the decoding, preserve numerical value and be sent to computer controlling center.
2. the pure passive wireless automatic meter recording system of employing surface acoustic wave techniques according to claim 1, it is characterized in that, described magnetic sensor row comprise: encoder magnet (2) and reed capsule (1), encoder magnet (2) adopts scale-of-two specific coding method to arrange, and the current numerical value of table tool is reflected on the attracting state of reed capsule (1) in binary mode.
3. the pure passive wireless automatic meter recording system of employing surface acoustic wave techniques according to claim 2 is characterized in that, described encoder magnet (2) is located on the table tool mechanical character wheel, rotates with table tool mechanical character wheel.
4. the pure passive wireless automatic meter recording system of employing surface acoustic wave techniques according to claim 2, it is characterized in that, described reed capsule (1) is located on the table tool pedestal, and the attracting state of reed capsule (1) sends SAW (Surface Acoustic Wave) device to by short circuit on electric and off state.
5. the pure passive wireless automatic meter recording system of employing surface acoustic wave techniques according to claim 1, it is characterized in that, described SAW (Surface Acoustic Wave) device comprises: reading reflecting grating array (4), device matrix (5), antenna (6), interdigital transducer (7) and coding reflecting grating array (8), antenna (6) receives the request signal of wireless reading inquiry machine emission, and send from the table tool that comprises of interdigital transducer (7) and encode, the answer signal of numerical information is to wireless reading inquiry machine, interdigital transducer (7) is converted to acoustic signals to the request signal that antenna (6) receives, propagate along device matrix (5) surface, interdigital transducer (7) is converted to electromagnetic wave signal to the acoustic signals of reflected back and sends antenna (6) to simultaneously, the reading reflecting grating array (4) that is positioned on the acoustic wave propagation path is arranged with the fixed position, reading reflecting grating array (4) receives from interdigital transducer (7) and propagates the acoustic signals of coming, and reflected back has the echoed signal of table tool numerical information, the coding reflecting grating array (8) that is positioned on the acoustic wave propagation path receives the acoustic signals that interdigital transducer (7) propagation is come, and reflected back is by the table tool coding of the coding decision of dispatching from the factory, as the identification number of distinguishing the different table tool.
6. the pure passive wireless automatic meter recording system of employing surface acoustic wave techniques according to claim 1, it is characterized in that, described computer controlling center is to wireless reading inquiry machine transmitting control commands, and receives the table tool numerical information that wireless reading inquiry machine sends, aggregation process.
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| CNB2005101109958A CN100342221C (en) | 2005-12-01 | 2005-12-01 | Pure passive wireless automatic meter recording system using sound surface wave technology |
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| CNB2005101109958A CN100342221C (en) | 2005-12-01 | 2005-12-01 | Pure passive wireless automatic meter recording system using sound surface wave technology |
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| CN100342221C true CN100342221C (en) | 2007-10-10 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101894451B (en) * | 2009-05-21 | 2013-10-16 | 晨星软件研发(深圳)有限公司 | Passive remote control unit and remote control method |
| CN103944648A (en) * | 2014-05-09 | 2014-07-23 | 北京纳衡仪器仪表有限公司 | System device and method based on pipeline sound wave communication |
| CN104296782B (en) * | 2014-10-08 | 2016-08-24 | 南京航空航天大学 | A kind of system and method strengthening surface acoustic wave transducing signal intensity |
| CN106127465A (en) * | 2016-08-16 | 2016-11-16 | 深圳信息职业技术学院 | Pallet automatic price system based on surface acoustic wave techniques |
| CN108680199B (en) * | 2018-04-28 | 2020-09-25 | 北京机械设备研究所 | Surface acoustic wave temperature and humidity sensor |
| CN114046916B (en) * | 2022-01-12 | 2023-03-24 | 南通大学 | Self-powered pressure measurement system based on surface acoustic wave sensor and working method thereof |
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| CN1177863A (en) * | 1996-08-29 | 1998-04-01 | 西门子公司 | Sound surface-wave device i. e. identification device or sensor using surfacewave to work |
| CN1364002A (en) * | 2002-02-07 | 2002-08-14 | 重庆大学 | Passive wireless ASW muti-sensor system and its frequency-division recognition method |
| CN1373557A (en) * | 2002-03-19 | 2002-10-09 | 重庆大学 | Resonance encode type passive wireless acoustic surface wave array sensor system |
| US20030016735A1 (en) * | 2001-07-23 | 2003-01-23 | Edmonson Peter J. | Communication system for two-way exchange of information |
| CN1687716A (en) * | 2005-04-30 | 2005-10-26 | 浙江大学 | Wireless and passive water meter and gas meter |
| US20050240110A1 (en) * | 2004-04-21 | 2005-10-27 | Honeywell International, Inc. | Passive and wireless in-vivo acoustic wave flow sensor |
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2005
- 2005-12-01 CN CNB2005101109958A patent/CN100342221C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1177863A (en) * | 1996-08-29 | 1998-04-01 | 西门子公司 | Sound surface-wave device i. e. identification device or sensor using surfacewave to work |
| US20030016735A1 (en) * | 2001-07-23 | 2003-01-23 | Edmonson Peter J. | Communication system for two-way exchange of information |
| CN1364002A (en) * | 2002-02-07 | 2002-08-14 | 重庆大学 | Passive wireless ASW muti-sensor system and its frequency-division recognition method |
| CN1373557A (en) * | 2002-03-19 | 2002-10-09 | 重庆大学 | Resonance encode type passive wireless acoustic surface wave array sensor system |
| US20050240110A1 (en) * | 2004-04-21 | 2005-10-27 | Honeywell International, Inc. | Passive and wireless in-vivo acoustic wave flow sensor |
| CN1687716A (en) * | 2005-04-30 | 2005-10-26 | 浙江大学 | Wireless and passive water meter and gas meter |
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