CN108663136A - Passive wireless acoustic surface wave temperature sensor anti-interference method - Google Patents
Passive wireless acoustic surface wave temperature sensor anti-interference method Download PDFInfo
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- CN108663136A CN108663136A CN201810780210.5A CN201810780210A CN108663136A CN 108663136 A CN108663136 A CN 108663136A CN 201810780210 A CN201810780210 A CN 201810780210A CN 108663136 A CN108663136 A CN 108663136A
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- temperature sensor
- surface wave
- acoustic surface
- passive wireless
- wireless acoustic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/22—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects
- G01K11/26—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects of resonant frequencies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
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- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses passive wireless acoustic surface wave temperature sensor anti-interference methods, include the following steps：S1, RFID high frequency interrogation devices are chosen, metal shielding box is fixed in the outer end of RFID high frequency interrogations device and passive wireless acoustic surface wave temperature sensor；S2, by being placed in smaller region as possible with the relevant element of passive wireless acoustic surface wave temperature sensor, and an oscillator and difference filter are installed in the inside of metal shielding box；S3, by setting up Difference Calculation module in difference filter, difference filter is examined after carrying out first-order difference to temperature signal, anti-interference to reach control passive wireless acoustic surface wave temperature sensor；By the present invention in that being analyzed with the signal examined after first-order difference and SPSS receives passive wireless acoustic surface wave temperature sensor, analysis result is accurate, and the frequency that passive wireless acoustic surface wave temperature sensor is also adjusted by oscillator is good to reach the jamproof effect of wireless acoustic surface wave temperature sensor.
Description
Technical field
The present invention relates to passive wireless acoustic surface wave temperature sensor technology field more particularly to passive wireless acoustic surface waves
Temperature sensor anti-interference method.
Background technology
The development of passive wireless acoustic surface wave technology originates from phase earlier 1960s, has four, 50 years so far
History, basic theory have been studied very fully using design, technology, computation model etc., and surface acoustic wave is a kind of
It propagates in substrate interface mechanical wave, in view of passive wireless acoustic surface wave technical characterstic, pushes a kind of novel, powerful passive nothing
It is realized in line surface acoustic wave signal processing, later stage nineteen seventies has pushed each electron-like of domestic and international wideband spread spectrum techniques
Extensive use in system, passive wireless surface acoustic wave sensor technology are a suitable current information System Development technologies, are nothings
Source wireless surface acoustic wave technology develops another climax.Passive wireless surface acoustic wave sensor, that is, saw sensor, it is
A kind of strain transducer based on surface acoustic wave techniques is capable of detecting when EPS manipulations and the torque and temperature in dynamical system application,
And the pressure and temperature in TPM system.It is particularly suitable for detecting rotary part or those contact are got up it is difficult to danger close living
Component.The external world can pass passive wireless acoustic surface wave temperature during passive wireless acoustic surface wave temperature sensor use
Sensor generate interference, to influence passive wireless acoustic surface wave temperature sensor detection temperature accuracy.Therefore, Wo Menti
Passive wireless acoustic surface wave temperature sensor anti-interference method is gone out for solving the above problems.
Invention content
The purpose of the present invention is to solve exist in the prior art to use in passive wireless acoustic surface wave temperature sensor
During the external world can to passive wireless acoustic surface wave temperature sensor generate interference, to influence passive wireless acoustic surface wave temperature
The shortcomings that spending the accuracy of the detection temperature of sensor, and the anti-interference side of passive wireless acoustic surface wave temperature sensor proposed
Method.
Passive wireless acoustic surface wave temperature sensor anti-interference method, includes the following steps：
S1, suitable RFID high frequency interrogations device is chosen, three identical RFID high frequency interrogations devices is located at passive and wireless sound surface
On wave temperature sensor, and metal is fixed in the outer end of RFID high frequency interrogations device and passive wireless acoustic surface wave temperature sensor
Shielding box, metal shielding box can effectively prevent radio signal or electromagnetic signal and enter passive and wireless sound by long transmission line
Surface wave temperature sensor carrys out the work of interfering passive wireless acoustic surface wave temperature sensor；
S2, by being placed in smaller region as possible with the relevant element of passive wireless acoustic surface wave temperature sensor, in order to
So that the wiring between signal wire is shortened, to reduce the cross jamming between signal wire, and an oscillator and difference are installed
Filter-divider is in the inside of metal shielding box；
S3, by setting up Difference Calculation module in difference filter, the equation of Difference Calculation module is Dy（t）=yt+1-yt, and
Variance is calculated using SPSS, process is that passive wireless acoustic surface wave temperature sensor detects temperature signal, and will be warm
Degree signal is transmitted to by amplifier in difference filter, and difference filter is examined after carrying out first-order difference to temperature signal, and
Inspection result is transmitted in controller, controller by judging difference result, if end value steadily if do not control oscillator
Work adjusts the frequency of passive wireless acoustic surface wave temperature sensor if difference value fluctuation is larger by controlling oscillator
Rate, to reach the control jamproof purpose of passive wireless acoustic surface wave temperature sensor.
Preferably, the frequency of the high frequency sinusoidal signal of the RFID high frequency interrogations device is 454MHz, RFID high frequency interrogation devices
High frequency sinusoidal signal step-length be 18KHz.
Preferably, it is electrically connected between the RFID high frequency interrogations device and passive wireless acoustic surface wave temperature sensor, and
The input terminal of the output end connection RFID high frequency interrogation devices of passive wireless acoustic surface wave temperature sensor.
Preferably, the oscillator is fixed on passive wireless acoustic surface wave temperature sensor, and oscillator with it is passive
It is connected between wireless acoustic surface wave temperature sensor by being electrically connected and communicating to connect two kinds of connection types.
Preferably, the passive wireless acoustic surface wave temperature sensor one-way communication is connected with amplifier, and amplifier is unidirectional
Communication link is connected to difference filter, and difference filter one-way communication is connected with oscillator.
Preferably, in the equation of the Difference Calculation module, t is the time that temperature sensor detects frequency, and y is the t times
When temperature sensor detection frequency.
The beneficial effects of the invention are as follows：The present invention can effectively prevent by the way that metal shielding box, metal shielding box is arranged
It is wireless come interfering passive that radio signal or electromagnetic signal by long transmission line enter passive wireless acoustic surface wave temperature sensor
The work of SAW Temperature Sensors, also by by with passive wireless acoustic surface wave temperature sensor relevant element as possible
It is placed in smaller region, in order to enable the wiring between signal wire is shortened, to reduce the cross jamming between signal wire；
By the present invention in that with examined after first-order difference and signal that SPSS receives passive wireless acoustic surface wave temperature sensor into
Row analysis, analysis result is accurate, and the frequency of passive wireless acoustic surface wave temperature sensor is also adjusted by oscillator, from
And it is good to reach the jamproof effect of wireless acoustic surface wave temperature sensor.
Specific implementation mode
The present invention is made further to explain with reference to specific embodiment.
Embodiment：Passive wireless acoustic surface wave temperature sensor anti-interference method, includes the following steps：
S1, suitable RFID high frequency interrogations device is chosen（The frequency of the high frequency sinusoidal signal of RFID high frequency interrogation devices is 454MHz,
The step-length of the high frequency sinusoidal signal of RFID high frequency interrogation devices is 18KHz）, three identical RFID high frequency interrogations devices are located at passive
On wireless acoustic surface wave temperature sensor, electrically connect between RFID high frequency interrogations device and passive wireless acoustic surface wave temperature sensor
It connects, and the input terminal of the output end connection RFID high frequency interrogation devices of passive wireless acoustic surface wave temperature sensor, and in RFID
Metal shielding box is fixed in the outer end of high frequency interrogation device and passive wireless acoustic surface wave temperature sensor, and metal shielding box can be effective
Prevent radio signal or electromagnetic signal from entering passive wireless acoustic surface wave temperature sensor by long transmission line to interfere nothing
The work of source wireless acoustic surface wave temperature sensor；
S2, by being placed in smaller region as possible with the relevant element of passive wireless acoustic surface wave temperature sensor, in order to
So that the wiring between signal wire is shortened, to reduce the cross jamming between signal wire, and an oscillator and difference are installed
In the inside of metal shielding box, oscillator is fixed on passive wireless acoustic surface wave temperature sensor filter-divider, and is vibrated
It is passive by being electrically connected and communicating to connect two kinds of connection type connections between device and passive wireless acoustic surface wave temperature sensor
Wireless acoustic surface wave temperature sensor one-way communication is connected with amplifier, and amplifier one-way communication is connected with difference filter, poor
Filter-divider one-way communication is connected with oscillator；
S3, by setting up Difference Calculation module in difference filter, the equation of Difference Calculation module is Dy（t）=yt+1-yt（T is
Temperature sensor detects the time of frequency, the frequency of temperature sensor detection when y is the t times）, and variance is carried out using SPSS
It calculates, process is that passive wireless acoustic surface wave temperature sensor detects temperature signal, and temperature signal is passed by amplifier
It is delivered in difference filter, difference filter is examined after carrying out first-order difference to temperature signal, and inspection result is transmitted to control
In device processed, controller by judging difference result, if end value steadily if do not control oscillator operation, if difference value fluctuate
It is larger, then the frequency of passive wireless acoustic surface wave temperature sensor is adjusted by controlling oscillator, it is passive to reach control
The jamproof purpose of wireless acoustic surface wave temperature sensor.
The present invention can effectively prevent radio signal or electromagnetic signal by the way that metal shielding box, metal shielding box is arranged
Enter passive wireless acoustic surface wave temperature sensor by long transmission line come interfering passive wireless acoustic surface wave temperature sensor
Work, also by by being placed in smaller region as possible with the relevant element of passive wireless acoustic surface wave temperature sensor,
In order to enable the wiring between signal wire is shortened, to reduce the cross jamming between signal wire；By the present invention in that using single order
The signal received to passive wireless acoustic surface wave temperature sensor with SPSS is examined to analyze after difference, analysis result is accurate
Really, the frequency that passive wireless acoustic surface wave temperature sensor and is also adjusted by oscillator, to reach wireless surface acoustic
The jamproof effect of wave temperature sensor is good.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. passive wireless acoustic surface wave temperature sensor anti-interference method, which is characterized in that include the following steps：
S1, suitable RFID high frequency interrogations device is chosen, three identical RFID high frequency interrogations devices is located at passive and wireless sound surface
On wave temperature sensor, and metal is fixed in the outer end of RFID high frequency interrogations device and passive wireless acoustic surface wave temperature sensor
Shielding box, metal shielding box can effectively prevent radio signal or electromagnetic signal and enter passive and wireless sound by long transmission line
Surface wave temperature sensor carrys out the work of interfering passive wireless acoustic surface wave temperature sensor；
S2, by being placed in smaller region as possible with the relevant element of passive wireless acoustic surface wave temperature sensor, in order to
So that the wiring between signal wire is shortened, to reduce the cross jamming between signal wire, and an oscillator and difference are installed
Filter-divider is in the inside of metal shielding box；
S3, by setting up Difference Calculation module in difference filter, the equation of Difference Calculation module is Dy（t）=yt+1-yt, and make
Variance is calculated with SPSS, process is that passive wireless acoustic surface wave temperature sensor detects temperature signal, and by temperature
Signal is transmitted to by amplifier in difference filter, and difference filter is examined after carrying out first-order difference to temperature signal, and will
Inspection result is transmitted in controller, controller by judging difference result, if end value steadily if do not control oscillator work
Make, if difference value fluctuation is larger, the frequency of passive wireless acoustic surface wave temperature sensor adjusted by controlling oscillator,
To achieve the purpose that control passive wireless acoustic surface wave temperature sensor is jamproof.
2. passive wireless acoustic surface wave temperature sensor anti-interference method according to claim 1, which is characterized in that described
The frequency of the high frequency sinusoidal signal of RFID high frequency interrogation devices is 454MHz, the step-length of the high frequency sinusoidal signal of RFID high frequency interrogation devices
For 18KHz.
3. passive wireless acoustic surface wave temperature sensor anti-interference method according to claim 1, which is characterized in that described
It is electrically connected between RFID high frequency interrogations device and passive wireless acoustic surface wave temperature sensor, and passive wireless acoustic surface wave temperature
The input terminal of the output end connection RFID high frequency interrogation devices of sensor.
4. passive wireless acoustic surface wave temperature sensor anti-interference method according to claim 1, which is characterized in that described
Oscillator is fixed on passive wireless acoustic surface wave temperature sensor, and oscillator and passive wireless acoustic surface wave temperature sensing
It is connected between device by being electrically connected and communicating to connect two kinds of connection types.
5. passive wireless acoustic surface wave temperature sensor anti-interference method according to claim 1, which is characterized in that described
Passive wireless acoustic surface wave temperature sensor one-way communication is connected with amplifier, and amplifier one-way communication is connected with differential filtering
Device, difference filter one-way communication are connected with oscillator.
6. passive wireless acoustic surface wave temperature sensor anti-interference method according to claim 1, which is characterized in that described
In the equation of Difference Calculation module, t is the time that temperature sensor detects frequency, the frequency of temperature sensor detection when y is the t times
Rate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810780210.5A CN108663136A (en) | 2018-07-16 | 2018-07-16 | Passive wireless acoustic surface wave temperature sensor anti-interference method |
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Citations (8)
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|---|---|---|---|---|
| CN1129050A (en) * | 1994-04-21 | 1996-08-14 | 艾利森公司 | Method for redn. of interference due to oscillators in electronic equipment |
| CN1708181A (en) * | 2004-06-04 | 2005-12-14 | 米其林技术公司 | Reducing coupling of RF interrogated saws to external bodies |
| JP2010178220A (en) * | 2009-01-30 | 2010-08-12 | Fujitsu Ten Ltd | Radio receiver and synchronous detecting circuit built in the receiver |
| CN102853934A (en) * | 2012-07-27 | 2013-01-02 | 上海赛赫信息科技有限公司 | Wireless temperature and humidity sensor and system and measuring method |
| CN103475387A (en) * | 2013-04-22 | 2013-12-25 | 江苏声立传感技术有限公司 | Method for improving signal detection sensitiveness of SAW (surface acoustic wave) wireless sensing |
| CN105099488A (en) * | 2015-07-20 | 2015-11-25 | 联想(北京)有限公司 | Radio-frequency circuit |
| CN205373913U (en) * | 2016-02-24 | 2016-07-06 | 南京科睿博电气科技有限公司 | Based on surface acoustic wave technique cubical switchboard temperature measurement interference shielding device |
| CN108809361A (en) * | 2018-07-17 | 2018-11-13 | 中国船舶重工集团公司第七〇九研究所 | A kind of wide bandwidth SAW reader reception device and its method |
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2018
- 2018-07-16 CN CN201810780210.5A patent/CN108663136A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1129050A (en) * | 1994-04-21 | 1996-08-14 | 艾利森公司 | Method for redn. of interference due to oscillators in electronic equipment |
| CN1708181A (en) * | 2004-06-04 | 2005-12-14 | 米其林技术公司 | Reducing coupling of RF interrogated saws to external bodies |
| JP2010178220A (en) * | 2009-01-30 | 2010-08-12 | Fujitsu Ten Ltd | Radio receiver and synchronous detecting circuit built in the receiver |
| CN102853934A (en) * | 2012-07-27 | 2013-01-02 | 上海赛赫信息科技有限公司 | Wireless temperature and humidity sensor and system and measuring method |
| CN103475387A (en) * | 2013-04-22 | 2013-12-25 | 江苏声立传感技术有限公司 | Method for improving signal detection sensitiveness of SAW (surface acoustic wave) wireless sensing |
| CN105099488A (en) * | 2015-07-20 | 2015-11-25 | 联想(北京)有限公司 | Radio-frequency circuit |
| CN205373913U (en) * | 2016-02-24 | 2016-07-06 | 南京科睿博电气科技有限公司 | Based on surface acoustic wave technique cubical switchboard temperature measurement interference shielding device |
| CN108809361A (en) * | 2018-07-17 | 2018-11-13 | 中国船舶重工集团公司第七〇九研究所 | A kind of wide bandwidth SAW reader reception device and its method |
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| CLEMENS PFEFFER等: "Interference recognition and fault reduction method for FSCW-based SAW-tag readers", 《2013 EUROPEAN RADAR CONFERENCE》 * |
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