CN108344800A - System for detecting temperature based on wireless passive sonic surface wave sensor and receive-transmit system - Google Patents
System for detecting temperature based on wireless passive sonic surface wave sensor and receive-transmit system Download PDFInfo
- Publication number
- CN108344800A CN108344800A CN201810046436.2A CN201810046436A CN108344800A CN 108344800 A CN108344800 A CN 108344800A CN 201810046436 A CN201810046436 A CN 201810046436A CN 108344800 A CN108344800 A CN 108344800A
- Authority
- CN
- China
- Prior art keywords
- module
- frequency
- signal
- radio
- link
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/036—Analysing fluids by measuring frequency or resonance of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/12—Analysing solids by measuring frequency or resonance of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/014—Resonance or resonant frequency
Abstract
The invention discloses a kind of system for detecting temperature and receive-transmit system based on wireless passive sonic surface wave sensor, belongs to temperature detection technical field.System for detecting temperature includes radio-frequency system and surface acoustic wave sensor, and radio-frequency system includes control unit, man-machine interaction unit, dual-mode antenna, transmitting link, receives link and selecting switch unit：Dual-mode antenna is multifrequency antenna；Transmitting link includes radiofrequency signal generation module, switch module, replaceable frequency adaptation module and the power amplifier module of electrical connection；Receives link includes replaceable filter module, signal amplification module and the power detection module of electrical connection；Selecting switch unit is connect for will selectively emit one of link and receives link with dual-mode antenna.Radio-frequency system based on the structure design can effectively improve its surface acoustic wave sensor range being adapted to, can be widely applied to the technical fields such as temperature detection.
Description
Technical field
The present invention relates to temperature detection technologies, specifically, being related to a kind of based on wireless passive sonic surface wave sensor
System for detecting temperature and radio-frequency system for building the system for detecting temperature.
Background technology
Surface acoustic wave sensor generally includes piezoelectric base unit and prepares electrode and antenna on the piezoelectric base unit, usual acoustic
Surface wave sensor is interdigital transducer, using the sound-electric transfer characteristic of piezoelectric material to realize electromagnetic wave and surface acoustic wave
Mutual conversion, its advantage is that wireless and passive, and can work under the adverse circumstances such as high temperature；Its radio characteristics makes its application scenarios
Cable limitation can be broken through, so as to be laid out on the position that the tradition such as moving object can not connect up to realize that temperature waits for detectable substance
Manage parameter detection, and its sourceless characteristic make its be not necessarily to sensor internal install battery, can better adapt to high temperature, strong acid,
The adverse circumstances such as high voltage, and convenient for safeguarding.
Sensing technology based on wireless passive sonic surface wave can be used for the mainframes such as electrical instrumentation, aero-engine
The temperature of device waits for the sensing scene of detection parameters.Wireless passive sonic surface wave sensing system usually by radio-frequency system and
The surface acoustic wave sensor composition being placed at measurand, radio-frequency system and surface acoustic wave sensor are respectively integrated with day
Line, radio-frequency system generate inquiry radiofrequency signal and are sent to surface acoustic wave sensor, and surface acoustic wave sensor receives inquiry
Radiofrequency signal, and the acoustic signals propagated along piezoelectric substrate surface are converted thereof into, the transmission characteristic of the acoustic signals, which carries, to be passed
The physical parameter informations such as the temperature around sensor, and electromagnetic wave signal is re-converted by integrated antenna and sends radio-frequency receiving-transmitting
System, radio-frequency system receive the echo-signal of sensor return, and analysis in real time obtains ring residing for surface acoustic wave sensor
The physical parameter informations such as the temperature in border.
For SAW device when making, due to technological reason, resonance center frequeH is likely to occur deviation.Meanwhile base
The different material property possessed by the SAW device of different application scenarios and different materials, it is practical prepare and
Its centre frequency dispersibility of the surface acoustic wave sensor used is larger, leads to the sound table for usually requiring that same model in the prior art
Wave sensor will have dedicated radio-frequency system matching.
Invention content
The purpose of the present invention is to provide a kind of system for detecting temperature based on wireless passive sonic surface wave sensor, to improve
Range of fit of the radio-frequency system to surface acoustic wave sensor；
Another object of the present invention is to provide a kind of radio-frequency system for building above-mentioned system for detecting temperature.
To achieve the goals above, system for detecting temperature provided by the invention includes radio-frequency system and is placed in tested
Surface acoustic wave sensor at object, radio-frequency system include control unit, man-machine interaction unit, dual-mode antenna, transmitting chain
Road, receives link and selecting switch unit：Man-machine interaction unit is connected with control unit communication, for receiving for detection control
The setting of parameter inputs and is controlled ground output temperature testing result by control unit；Dual-mode antenna is multifrequency antenna；Emit link
Be controlled by control unit, along direction of travel of the signal in emitting link, sequentially include electrical connection radiofrequency signal generation module,
Switch module, frequency adaptation module and power amplifier module, frequency adaptation module are replaceable；It is single that receives link is controlled by control
Member includes sequentially filter module, signal amplification module and the power inspection of electrical connection along direction of travel of the signal in receives link
Wave module, filter module are replaceable；Selecting switch unit, for selectively will transmitting one of link and receives link with
The dual-mode antenna connection.
Radio-frequency system based on said structure design can pass through human-computer interaction according to different surface acoustic wave sensors
Module input detection control parameter, and select the module that matches with the surface acoustic wave sensor with frequency of replacement adaptation module with
Filter module, so as to make the radio-frequency system be applicable to the surface acoustic wave sensor of different frequency range and detect the change of environment
Change, it is effectively cost-effective without configuring a large amount of radio-frequency system.In addition, being based on switch module and selecting switch
The setting of module effectively transmitting signal can be isolated with response signal, to improve job stability and the inspection of the system
Survey accuracy.
Specific scheme is that radiofrequency signal generation module includes phase-locked loop module, and switch module is single-way switch module, choosing
It includes single-pole double-throw switch (SPDT) module to select switch unit, and man-machine interaction unit includes touch screen, and signal amplification module is variable gain
The downstream of amplification module, power detection module is equipped with analog-to-digital conversion module, and frequency adaptation module is band logical filter with filter module
Wave module.
Preferred scheme is that detection control parameter includes the inquiry radiofrequency signal group ginseng to match with surface acoustic wave sensor
Number and the calculating formula for characterizing transformational relation between the resonant frequency of surface acoustic wave sensor and environment temperature, inquiry radiofrequency signal
Group parameter includes radiofrequency signal frequency range and signal step-length or number of signals；Transformational relation is linear relationship, and signal step-length is to wait to walk
It is long.
Unit includes processor and memory to another preferred scheme in order to control, and memory is stored with computer program,
Computer program can realize following steps when being executed by processor：
Receiving step receives the setting to detection control parameter by man-machine interaction unit input pin；
Transceiving step, according to detection control parameter, control transmitting link emits one group of inquiry RF pulse-to-pulse by dual-mode antenna
Punching, and control and receive link and the one group of response signal fed back for one group of inquiry radio-frequency pulse is received by dual-mode antenna；
Processing step is based on one group of response signal, obtains the resonant frequency of surface acoustic wave sensor；
Step is calculated, the current temperature value of measurand is calculated based on the resonant frequency obtained in processing step.
Preferred scheme is in transceiving step, and one group of inquiry radio-frequency pulse includes several gradual frequency changes and frequency pre-
If the radio-frequency pulse in radiofrequency signal frequency range；After receiving the response signal for previous inquiry radiofrequency signal, then under emitting
One inquiry pulse signal；When control emits link transmissions inquiry radiofrequency signal, the connection of control switch module simultaneously open by control selections
Link and dual-mode antenna are penetrated in connection sending and receiving；When controlling and receiving link reception response signal, control switch module disconnects and control
Selecting switch connects receives link and dual-mode antenna；In processing step, obtains and exported by power detection module for characterizing sound
The amplitude data of induction signal amplitude, it is corresponding with maximum amplitude data in amplitude data group corresponding with one group of inquiry radio-frequency pulse
Inquiry radiofrequency signal frequency be surface acoustic wave sensor resonant frequency；In processing step, to emit an inquiry
The signal received in scheduled duration after radiofrequency signal is the response signal for the inquiry radiofrequency signal；In calculating step, according to
According in the detection control parameter of receipts by characterizing between the resonant frequency of surface acoustic wave sensor and environment temperature based on transformational relation
Formula calculates Current Temperatures using the resonant frequency that processing step obtains.
In order to realize that above-mentioned another object, radio-frequency system provided by the invention are used for and surface acoustic wave sensor
With use, including control unit, man-machine interaction unit, dual-mode antenna, transmitting link, receives link and selecting switch unit；People
Machine interactive unit is connected with control unit communication, for receiving for the setting input of transmitting-receiving control parameter and by control unit control
System ground output testing result；Dual-mode antenna is multifrequency antenna；Transmitting link is controlled by control unit, along signal in emitting link
Direction of travel, sequentially include electrical connection radiofrequency signal generation module, switch module, frequency adaptation module and power amplification mould
Block, frequency adaptation module are replaceable；Receives link is controlled by control unit, along direction of travel of the signal in receives link, according to
Sequence includes that the filter module, signal amplification module and power detection module, filter module of electrical connection are replaceable；Selecting switch unit
It is connect with dual-mode antenna for will selectively emit one of link and receives link.
Radio-frequency system based on said structure design can pass through human-computer interaction according to different surface acoustic wave sensors
Module input detection control parameter, and select the module that matches with the surface acoustic wave sensor with frequency of replacement adaptation module with
Filter module, so as to make the radio-frequency system be applicable to the surface acoustic wave sensor of different frequency range and detect the change of environment
Change, it is effectively cost-effective without configuring a large amount of radio-frequency system.In addition, being based on switch module and selecting switch
The setting of module effectively transmitting signal can be isolated with response signal, to improve job stability and the inspection of the system
Survey accuracy
Specific scheme is that radiofrequency signal generation module includes phase-locked loop module, and switch module is single-way switch module, choosing
It includes single-pole double-throw switch (SPDT) module to select switch unit, and man-machine interaction unit includes touch screen, and signal amplification module is variable gain
The downstream of amplification module, power detection module is equipped with analog-to-digital conversion module, and frequency adaptation module is band logical filter with filter module
Wave module.
Preferred scheme is that transmitting-receiving control parameter includes the inquiry radiofrequency signal group ginseng to match with surface acoustic wave sensor
The calculating formula of transformational relation between number and the resonant frequency for characterizing surface acoustic wave sensor and parameter to be detected, inquiry radio frequency letter
Number group parameter includes radiofrequency signal frequency range and signal step-length or number of signals；Transformational relation is linear relationship, and signal step-length is etc.
Step-length.
Unit includes processor and memory to another preferred scheme in order to control, and memory is stored with computer program,
Computer program can realize following steps when being executed by the processor：
Receiving step receives the setting to transmitting-receiving control parameter by man-machine interaction unit input pin；
Transceiving step, according to transmitting-receiving control parameter, control transmitting link emits one group of inquiry RF pulse-to-pulse by dual-mode antenna
Punching, and control and receive link and the one group of response signal fed back for one group of inquiry radio-frequency pulse is received by dual-mode antenna；
Processing step is based on one group of response signal, obtains the resonant frequency of surface acoustic wave sensor；
Step is calculated, the current value of parameter to be detected is calculated based on the resonant frequency obtained in processing step.
Preferred scheme is in transceiving step, and one group of inquiry radio-frequency pulse includes several gradual frequency changes and frequency pre-
If the radio-frequency pulse in radiofrequency signal frequency range；After receiving the response signal for previous inquiry radiofrequency signal, then under emitting
One inquiry pulse signal；When control emits link transmissions inquiry radiofrequency signal, the connection of control switch module simultaneously open by control selections
Link and dual-mode antenna are penetrated in connection sending and receiving；When controlling and receiving link reception response signal, control switch module disconnects and control
Selecting switch connects receives link and dual-mode antenna；In processing step, obtains and exported by power detection module for characterizing sound
The amplitude data of induction signal amplitude, it is corresponding with maximum amplitude data in amplitude data group corresponding with one group of inquiry radio-frequency pulse
Inquiry radiofrequency signal frequency be surface acoustic wave sensor resonant frequency；In processing step, to emit an inquiry
The signal received in scheduled duration after radiofrequency signal is the response signal for the inquiry radiofrequency signal；In calculating step, according to
It is closed according in the transmitting-receiving control parameter received for characterizing to convert between the resonant frequency of surface acoustic wave sensor and parameter to be detected
The calculating formula of system, the resonant frequency obtained using processing step calculate the current value of parameter to be detected.
Description of the drawings
Fig. 1 is the circuit principle structure schematic diagram of system for detecting temperature in the embodiment of the present invention；
Fig. 2 is the work flow diagram that system for detecting temperature carries out temperature detection in the embodiment of the present invention.
Specific implementation mode
With reference to embodiments and its attached drawing the invention will be further described.
System for detecting temperature embodiment
Referring to Fig. 1, system for detecting temperature 1 of the present invention includes radio-frequency system 2 and the sound table being placed at measurand
Wave sensor 3, radio-frequency system 2 include control unit 20, man-machine interaction unit 21, transmitting link 22, receives link 23,
Selecting switch unit 24 and dual-mode antenna 25.
Control unit 20 selects FPGA, the work for controlling entire radio-frequency system 2, including processor and storage
Device, memory are stored with computer program, when which is executed by processor, by controlling the work of other units
Realize the detection function to temperature.
Man-machine interaction unit 21 is selected to the touch screen of the electrical connection of control unit 20, can be not only used for receiving the defeated of data
Enter, it may also be used for displays temperature testing result.It of courses, go back data available load button and is used for output temperature testing result
Speaker combination substitutes touch screen and constitutes the man-machine interaction unit 21 in the present embodiment.
Along direction of travel of the signal in emitting link 22, transmitting link 22 includes sequentially the phase-locked loop module of electrical connection
41, single-way switch module 42, frequency adaptation module 43 and power amplifier module 44, frequency adaptation module are replaceable and are band logical
Filter module, you can the bandpass filtering modules block for accessing corresponding frequency band according to actual needs, with selectively in emitting link 22
Access the filter module of corresponding frequency band.Phase-locked loop module 41 constitutes the radiofrequency signal generation module in the present embodiment, to control
Under the control of unit 20, the radiofrequency signal of respective frequencies is generated, the specific chip module for using model ADF4360-7；Unidirectionally
Switch module 42 constitutes the switch module in the present embodiment, for controlling between phase-locked loop module 41 and frequency adaptation module 43
Break-make is specific to select model ADG901 chip modules；Frequency adaptation module 43 is for alloing power amplifier module 44 to exist
There is best transmission performance, to enable a system to be adapted to a variety of surface acoustic wave sensors, in the system under present operating frequency
Upper to integrate the different frequency adaptation module of multiple frequency ranges, specific selection filter module is as the frequency adaptation mould in the present embodiment
Block, to selectively access the frequency adaptation module of corresponding frequency band to be adapted to current surface acoustic wave sensor 3；Power amplification mould
Block 44 is used to carry out power amplification to radiofrequency signal caused by phase-locked loop module 41, specific to select model ADL5324 chips
Module.
Along direction of travel of the signal in receives link 23, receives link 23 includes sequentially the variable gain amplification of electrical connection
Module 54, filter module 53, power detection module 52 and analog-to-digital conversion module 51, filter module are replaceable and are bandpass filtering
Module, you can the bandpass filtering modules block for accessing corresponding frequency band according to actual needs selectively accesses in receives link 23
The filter module of corresponding frequency band.Variable gain amplification module 54 constitutes signal amplification module in the present embodiment, with to dual-mode antenna
25 response signals received are amplified processing, are multi-stage power amplifier, specific to select model ADL5243 chip dies
Block.Filter module 53 is used to filter out the noise of variable power amplifier generation, reduces the interference to power detector, to make system
A variety of surface acoustic wave sensors can be adapted to, it is upper in the system to integrate the different filter module of multiple frequency ranges, to selectively
The filter module of corresponding frequency band is accessed to be adapted to current surface acoustic wave sensor 3.Power detection module 52 is received for obtaining
The response signal arrived is in the amplitude after gain process, the specific chip module for selecting model ADL5902.Analog-to-digital conversion module
51 can handle digital signal for the signal that power detection module 52 is exported to be converted into FPGA, and specific selection signal is
The chip module of AD7091.
Selecting switch unit 24, for will selectively emit one of link 22 and receives link 23 and radio-frequency receiving-transmitting
Antenna 25 connect, by the cooperation of single-way switch 41 can realize to receives link and transmitting link between signal carry out every
From specific to select model ADL5324 single-pole double-throw switch (SPDT) modules.
Dual-mode antenna 25 is multifrequency antenna, to match the transmitting-receiving task of different frequency range radiofrequency signal.
Surface acoustic wave sensor 3 is placed at measurand, to realize wireless and passive sensing detection, working frequency according to
Actual needs is selected, and selection work frequency is the surface acoustic wave sensor of 433MHz in the present embodiment comprising piezoelectricity
The interdigital electrode of matrix and preparation on the piezoelectric base unit and dual-mode antenna electrode.
The use of the method that above-mentioned system for detecting temperature carries out temperature detection include receiving step S1, transceiving step referring to Fig. 2
S2, processing step S3 and calculating step S4, i.e., the processor in control unit 20 execute the computer being stored in its memory
Abovementioned steps may be implemented in program, are detected with the temperature to measurand.It is specific as follows：
Receiving step S1 receives the setting to the detection control parameter by human-computer interaction module input pin.
In this system for detecting temperature, detection control parameter includes the inquiry radio frequency letter to match with surface acoustic wave sensor
Number group parameter and the calculating formula for characterizing transformational relation between the resonant frequency of surface acoustic wave sensor and environment temperature.Inquiry is penetrated
Frequency signal group parameter includes radiofrequency signal frequency range and signal step-length or number of signals, i.e., with 3 phase of current surface acoustic wave sensor
The frequency range matched, and emit in detection process the frequency step of two neighboring radiofrequency signal in multiple inquiry radiofrequency signals, to
The temperature range substantially to be measured of consideration measurand that can be specific, and empirically formula releases the range of its resonant frequency, and
Expand the resonant frequency range as radiofrequency signal frequency range in predetermined fluctuation range.I.e. the step of acquisition radiofrequency signal frequency range, includes
Temperature fluctuation range is estimated according to measurand, the resonant frequency range of SAW sensor is calculated using calculating formula,
Section is enlarged to obtain radiofrequency signal frequency range to resonant frequency range based on predetermined fluctuation ratio again.In the present embodiment,
In certain temperature fluctuation range, the temperature line relationship of the resonant frequency of surface acoustic wave sensor 3 and its environment, letter
Number step-length selects unique step.
And for calculating formula, obtaining step is the mounting ring in measurand based on simulation surface acoustic wave sensor
Border fits resonance using the resonant frequency for the surface acoustic wave sensor measured and the temperature corresponding data group of measurand
The relational expression of frequency and temperature constitutes calculating formula, selects the secondary above curve matching or linear fit, line is selected in the present embodiment
Property fitting.
Corresponding matched filtering module is first specially selected according to the frequency range where surface acoustic wave sensor 3 in systems
As the bandpass filter network insertion signal path in frequency adaptation module 43 and receives link 23 as filter module 53, so
Correspondence of the radiofrequency signal frequency range as the system control parameters and input temp-resonant frequency characteristic is set in touch screen afterwards
Transfer algorithm, i.e. calculating formula, it is temperature to select once linear expression formula Y=AX+B, Y in the present embodiment, and X is resonant frequency,
That is input parameter A and parameter B.
Transceiving step S2, according to detection control parameter, control transmitting link emits one group of inquiry radio frequency by dual-mode antenna
Pulse, and control and receive link and the one group of response signal fed back for one group of inquiry radio-frequency pulse is received by dual-mode antenna.
Wherein, one group of inquiry radio-frequency pulse includes the radio frequency of several gradual frequency changes and frequency in default radiofrequency signal frequency range
Pulse, i.e., one group of radio frequency letter of the frequency increments generated according to the radiofrequency signal frequency range of input and signal step-length or number of signals
Number；When control transmitting link 22 emits inquiry radiofrequency signal, control single-way switch module 42 is connected to and control selections switch is single
24 connection transmitting link 22 of member and dual-mode antenna 25；When controlling and receiving the reception response signal of link 23, single-way switch mould is controlled
Block 42 disconnects and control selections switch module 42 connects receives link 23 and dual-mode antenna 25, that is, be based on single-way switch module 42 with
The cooperation of selecting switch unit 24, and realizing after receiving the response signal for previous inquiry radiofrequency signal, then under emitting
One inquiry pulse signal.
The connection of control selections switch unit 24 transmitting link 22 and dual-mode antenna 25, transmitting link 22 work.Locking phase ring moulds
The continuous signal that required frequency is launched in frequency multiplication locking of the block 41 inside passes through switch by single-way switch module 42
Break-make is spaced output inquiry radiofrequency signal from inside to outside, transmitting work(is amplified to using power amplifier module 44 at a fixed time
Rate is horizontal.Obtained signal is launched by dual-mode antenna 25, and is received by surface acoustic wave sensor 3.
Surface acoustic wave sensor 3 receives inquiry RF signal by sensor antenna, and by inverse piezoelectric effect by telecommunications
Number acoustic signals being converted to, acoustic signals can carry the temperature information of upper SAW device when being propagated in surface acoustic wave device 3,
And the acoustic signals converted back into electric signals with temperature information is fed back finally by sensor antenna and rung by direct piezoelectric effect
Induction signal.
After interrogation signal, selecting switch unit 24 selects dual-mode antenna 25 to be connected with receives link 23.At this point, locking phase
The signal that ring moulds block 41 generates is isolated by unidirectional switch module 42 and selecting switch unit 24.Dual-mode antenna 25 receives sound table
The echo-signal with temperature information that wave sensor 3 returns, receives link 23 work.Signal first passes around a variable increasing
Signal is amplified to the power level that power detection module 52 can detect by beneficial amplification module 54, by power detection module 52,
That is conversion of the signal strength to voltage value is realized in logarithmic converter, this part.Transformed voltage passes through analog-to-digital conversion module 51
Conversion, by defeated time control unit 20 of the digital quantity of voltage.
Processing step S3 is based on one group of response signal, obtains the resonant frequency of surface acoustic wave sensor.
The amplitude data for characterizing response signal amplitude by the output of power detection module 52 is obtained, to be penetrated with one group of inquiry
The frequency of the corresponding inquiry radiofrequency signal of maximum amplitude data senses for the surface acoustic wave in the corresponding amplitude data group of frequency pulse
The current resonant frequency of device.And it requires with the signal received in scheduled duration after emitting an inquiry radiofrequency signal to be for this
The response signal of inquiry radiofrequency signal selects 10 microseconds in the present embodiment.
For control unit 20 within a whole thermometric period, control phase-locked loop module 41 exports different frequencies, is working
Such as 432-436MHz in range, scanned by the step-by-step movement of step-length of 100kHz；It of courses, can be needed and be selected according to accuracy of detection
With shorter step-length, such as 10Hz.The inquiry radiofrequency signal of each frequency is launched through dual-mode antenna 25, then passes through sound
The electro-acoustic of surface wave sensor 3 is converted, and surface acoustic wave converts back and believes with temperature in the resonance selection echo of sensor internal
The electric signal of breath.The RF signal strength of this echo is converted into voltage, is then converted to digital quantity.In a large period,
The preceding 10 μ s times that each receiver receives, control unit 20 record and compare the number of these defeated time expression response intensity
Amount, and be mapped with interrogation signal frequency at that time, the frequency corresponding to maximum response intensity is exactly radio-frequency receiving-transmitting
The resonant frequency of surface acoustic wave sensor measured by system.It is closed according to temperature-resonant frequency characteristic of surface acoustic wave sensor 3
It is, and the calculating formula inputted that the temperature corresponding to this frequency is exactly the temperature of environment where sensor.
Step S4 is calculated, the Current Temperatures of measurand are calculated based on the resonant frequency obtained in processing step.
According to the resonant frequency and environment temperature for characterizing surface acoustic wave sensor in the detection control parameter received
Between transformational relation calculating formula, utilize the resonant frequency that processing step S3 is obtained to calculate the Current Temperatures of measurand.
The obtained temperature information of processing is exported to human-computer interaction module 21 and is shown by control unit 20, then again into
Enter step S2, continues next thermometric period.If the numerical value very little that analog-to-digital conversion module 51 exports is less than range preset ratio
Value, is, for example, less than the 10% of range, then shows that reception power is smaller, control unit 20 controls human-computer interaction module 21 and exports at this time
Failure warning, such as loud speaker or warning lamp by coordinating with touch screen are given a warning, to prompt to carry out radio-frequency receiving-transmitting
The distance between system 2 and surface acoustic wave sensor 3 are generally advisable at 20 centimetres -50 centimetres, and adjust variable power amplification mould
The gain level of block 54, if after repeatedly adjusting, the numerical value very little that analog-to-digital conversion module 51 exports, i.e., still less than range
Preset ratio value shows that the surface acoustic wave sensor function is impaired, then exports the prompt for replacing surface acoustic wave sensor 3.
Radio-frequency system embodiment
This radio-frequency system embodiment is illustrated in above-mentioned system for detecting temperature embodiment, herein not
It repeats again, wherein detection control parameter constitutes the transmitting-receiving control parameter in the present embodiment, the resonant frequency of surface acoustic wave sensor
Between environment temperature the calculating formula of transformational relation then constitute in the present embodiment the resonant frequency of surface acoustic wave sensor with it is to be detected
The calculating formula of transformational relation between physical quantity, is configured with specific reference to physical quantity to be detected, which is can shadow
The resonant frequency of sound surface wave sensor, and resonant frequency variation waits for that physical quantity is closed at one-to-one correspondence in measurement range with this
System, the preferably approximately physical quantity to be detected of linear relationship.
Claims (10)
1. a kind of system for detecting temperature based on wireless passive sonic surface wave sensor, including radio-frequency system and be placed in by
Survey the surface acoustic wave sensor at object, which is characterized in that the radio-frequency system includes：
Control unit；
Man-machine interaction unit, with described control unit communicate connect, for receives for detection control parameter setting input and
Ground output temperature testing result is controlled by described control unit；
Dual-mode antenna is multifrequency antenna；
Emit link, be controlled by described control unit, includes sequentially the radiofrequency signal generation of electrical connection along the direction of travel of signal
Module, switch module, frequency adaptation module and power amplifier module, the frequency adaptation module are replaceable；
Receives link is controlled by described control unit, and along the direction of travel of signal, the signal for including sequentially electrical connection amplifies mould
Block, filter module and power detection module, the filter module are replaceable；
Selecting switch unit, for selectively by one of the transmitting link and the receives link and the transmitting-receiving day
Line connects.
2. system for detecting temperature according to claim 1, it is characterised in that：
The radiofrequency signal generation module includes phase-locked loop module, and the switch module is single-way switch module, and the selection is opened
It includes single-pole double-throw switch (SPDT) module to close unit, and the man-machine interaction unit includes touch screen, and the signal amplification module is variable
The downstream of gain amplification module, the power detection module is equipped with analog-to-digital conversion module, the frequency adaptation module and the filter
Wave module is bandpass filtering modules block.
3. system for detecting temperature according to claim 1 or 2, it is characterised in that：
The detection control parameter includes the inquiry radiofrequency signal group parameter to match with the surface acoustic wave sensor and is used for
Characterize the calculating formula of transformational relation between the resonant frequency and environment temperature of the surface acoustic wave sensor, the inquiry radiofrequency signal
Group parameter includes radiofrequency signal frequency range and signal step-length or number of signals；
The transformational relation is linear relationship, and the signal step-length is unique step.
4. according to the system for detecting temperature described in any one of claims 1 to 3 claim, which is characterized in that the control is single
Member includes processor and memory, and the memory is stored with computer program, and the computer program is held by the processor
Following steps can be realized when row：
Receiving step receives the setting to the detection control parameter by the man-machine interaction unit input pin；
Transceiving step controls the transmitting link and is asked for one group by dual-mode antenna transmitting according to the detection control parameter
Radio-frequency pulse is ask, and the control receives link is received by the dual-mode antenna and fed back for one group of inquiry radio-frequency pulse
One group of response signal；
Processing step is based on one group of response signal, obtains the resonant frequency of the surface acoustic wave sensor；
Step is calculated, the current temperature value of the measurand is calculated based on the resonant frequency obtained in the processing step.
5. system for detecting temperature according to claim 4, it is characterised in that：
In the transceiving step, one group of inquiry radio-frequency pulse includes several gradual frequency changes and frequency in default radiofrequency signal
Radio-frequency pulse in frequency range；After receiving the response signal for previous inquiry radiofrequency signal, then emit next inquiry pulse
Signal；When control emits link transmissions inquiry radiofrequency signal, controls the switch module and be connected to and control the selecting switch
Unit connects the transmitting link and the dual-mode antenna；When controlling and receiving link reception response signal, the switch is controlled
Module disconnects and controls the selecting switch unit and connects the receives link and the dual-mode antenna；
In the processing step, the amplitude number exported by the power detection module for characterizing response signal amplitude is obtained
According to the corresponding inquiry radiofrequency signal of maximum amplitude data in amplitude data group corresponding with one group of inquiry radio-frequency pulse
Frequency be the surface acoustic wave sensor resonant frequency；
It is to be asked for this with the signal received in scheduled duration after emitting an inquiry radiofrequency signal in the processing step
Ask the response signal of radiofrequency signal；
In the calculating step, for characterizing the humorous of the surface acoustic wave sensor in the detection control parameter that foundation is received
The calculating formula of transformational relation between vibration frequency and environment temperature is calculated described current using the resonant frequency that the processing step obtains
Temperature value.
6. a kind of radio-frequency system, for being used cooperatively with wireless passive sonic surface wave sensor, which is characterized in that described to penetrate
Frequency receive-transmit system includes：
Control unit；
Man-machine interaction unit, with described control unit communicate connect, for receives for transmitting-receiving control parameter setting input and
Testing result is exported by described control unit control；
Dual-mode antenna is multifrequency antenna；
Emit link, be controlled by described control unit, includes sequentially the radiofrequency signal generation of electrical connection along the direction of travel of signal
Module, switch module, frequency adaptation module and power amplifier module, the frequency adaptation module are replaceable；
Receives link is controlled by described control unit, includes sequentially filter module, the letter of electrical connection along the direction of travel of signal
Number amplification module and power detection module, the filter module are replaceable；
Selecting switch unit, for selectively by one of the transmitting link and the receives link and the transmitting-receiving day
Line connects.
7. radio-frequency system according to claim 6, it is characterised in that：
The radiofrequency signal generation module includes phase-locked loop module, and the switch module is single-way switch module, and the selection is opened
It includes single-pole double-throw switch (SPDT) module to close unit, and the man-machine interaction unit includes touch screen, and the signal amplification module is variable
The downstream of gain amplification module, the power detection module is equipped with analog-to-digital conversion module, the frequency adaptation module and the filter
Wave module is bandpass filtering modules block.
8. the radio-frequency system described according to claim 6 or 7, it is characterised in that：
The transmitting-receiving control parameter includes the inquiry radiofrequency signal group parameter to match with the surface acoustic wave sensor and is used for
Characterize the calculating formula of transformational relation between the resonant frequency of the surface acoustic wave sensor and parameter to be detected, the inquiry radio frequency letter
Number group parameter includes radiofrequency signal frequency range and signal step-length or number of signals；
The transformational relation is linear relationship, and the signal step-length is unique step.
9. according to radio-frequency system described in any one of claim 6 to 8 claim, which is characterized in that described control unit
Including processor and memory, the memory is stored with computer program, and the computer program is executed by the processor
When can realize following steps：
Receiving step receives the setting to the transmitting-receiving control parameter by the man-machine interaction unit input pin；
Transceiving step controls the transmitting link and is asked for one group by dual-mode antenna transmitting according to the transmitting-receiving control parameter
Radio-frequency pulse is ask, and the control receives link is received by the dual-mode antenna and fed back for one group of inquiry radio-frequency pulse
One group of response signal；
Processing step is based on one group of response signal, obtains the resonant frequency of the surface acoustic wave sensor；
Step is calculated, the current value of the parameter to be detected is calculated based on the resonant frequency obtained in the processing step.
10. radio-frequency system according to claim 9, it is characterised in that：
In the transceiving step, one group of inquiry radio-frequency pulse includes several gradual frequency changes and frequency in default radiofrequency signal
Radio-frequency pulse in frequency range；After receiving the response signal for previous inquiry radiofrequency signal, then emit next inquiry pulse
Signal；When control emits link transmissions inquiry radiofrequency signal, controls the switch module and be connected to and control the selecting switch
Unit connects the transmitting link and the dual-mode antenna；When controlling and receiving link reception response signal, the switch is controlled
Module disconnects and controls the selecting switch unit and connects the receives link and the dual-mode antenna；
In the processing step, the amplitude number exported by the power detection module for characterizing response signal amplitude is obtained
According to the corresponding inquiry radiofrequency signal of maximum amplitude data in amplitude data group corresponding with one group of inquiry radio-frequency pulse
Frequency be the surface acoustic wave sensor resonant frequency；
It is to be asked for this with the signal received in scheduled duration after emitting an inquiry radiofrequency signal in the processing step
Ask the response signal of radiofrequency signal；
In the calculating step, for characterizing the humorous of the surface acoustic wave sensor in the transmitting-receiving control parameter that foundation is received
The calculating formula of transformational relation between vibration frequency and the parameter to be detected calculates institute using the resonant frequency that the processing step obtains
State current value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810046436.2A CN108344800B (en) | 2018-01-17 | 2018-01-17 | Temperature detection system and transceiving system based on wireless passive surface acoustic wave sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810046436.2A CN108344800B (en) | 2018-01-17 | 2018-01-17 | Temperature detection system and transceiving system based on wireless passive surface acoustic wave sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108344800A true CN108344800A (en) | 2018-07-31 |
| CN108344800B CN108344800B (en) | 2020-04-14 |
Family
ID=62961526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810046436.2A Active CN108344800B (en) | 2018-01-17 | 2018-01-17 | Temperature detection system and transceiving system based on wireless passive surface acoustic wave sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108344800B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426137A (en) * | 2019-08-12 | 2019-11-08 | 国网河南省电力公司新乡供电公司 | A kind of temperature checking method, device, system and computer readable storage medium |
| CN110736557A (en) * | 2019-10-24 | 2020-01-31 | 深圳市三和电力科技有限公司 | data collector for passive wireless temperature transmission measuring system |
| CN112527029A (en) * | 2020-12-07 | 2021-03-19 | 上海卫星工程研究所 | Wireless passive temperature control system applied to satellite thermal control system |
| CN112617787A (en) * | 2020-12-16 | 2021-04-09 | 东南大学 | Passive wireless heart rhythm monitoring system based on radio frequency surface acoustic wave sensor |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04148858A (en) * | 1990-10-11 | 1992-05-21 | Koji Toda | Method and apparatus for ultrasonic wave image |
| CN2266227Y (en) * | 1996-06-24 | 1997-10-29 | 哈尔滨工业大学 | Multi-channel sound surface narrow-band matched filter set |
| CN1364002A (en) * | 2002-02-07 | 2002-08-14 | 重庆大学 | Passive wireless ASW muti-sensor system and its frequency-division recognition method |
| CN1813215A (en) * | 2003-07-07 | 2006-08-02 | 株式会社村田制作所 | Acoustooptic filter |
| US20120092332A1 (en) * | 2010-10-15 | 2012-04-19 | Sony Corporation | Input device, input control system, method of processing information, and program |
| CN102914384A (en) * | 2012-10-19 | 2013-02-06 | 武汉烽火富华电气有限责任公司 | Temperature detection method based on passive wireless surface acoustic wave temperature sensor |
| CN103267589A (en) * | 2013-05-22 | 2013-08-28 | 国家电网公司 | Wireless passive temperature real-time monitoring system |
| CN103279777A (en) * | 2013-05-06 | 2013-09-04 | 西南交通大学 | Wireless surface acoustic wave temperature measurement system reader-writer |
| CN103868618A (en) * | 2014-03-03 | 2014-06-18 | 上海交通大学 | Multi-sensor recognition-based temperature detection system |
| CN203672515U (en) * | 2014-01-17 | 2014-06-25 | 珠海赛迪生电气设备有限公司 | Passive wireless type on-line temperature measurement system |
| CN104990625A (en) * | 2015-06-18 | 2015-10-21 | 电子科技大学 | Wireless test circuit of resonant type surface acoustic wave sensor and test method |
| EP3176550A1 (en) * | 2014-08-02 | 2017-06-07 | Mesnac Co., Ltd. | Surface-acoustic wave resonator type vibration sensor and vibration detection system |
| CN107576345A (en) * | 2017-07-21 | 2018-01-12 | 南京航空航天大学 | The wireless measuring system and measuring method of multinode resonator type surface acoustic wave sensor |
-
2018
- 2018-01-17 CN CN201810046436.2A patent/CN108344800B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04148858A (en) * | 1990-10-11 | 1992-05-21 | Koji Toda | Method and apparatus for ultrasonic wave image |
| CN2266227Y (en) * | 1996-06-24 | 1997-10-29 | 哈尔滨工业大学 | Multi-channel sound surface narrow-band matched filter set |
| CN1364002A (en) * | 2002-02-07 | 2002-08-14 | 重庆大学 | Passive wireless ASW muti-sensor system and its frequency-division recognition method |
| CN1813215A (en) * | 2003-07-07 | 2006-08-02 | 株式会社村田制作所 | Acoustooptic filter |
| US20120092332A1 (en) * | 2010-10-15 | 2012-04-19 | Sony Corporation | Input device, input control system, method of processing information, and program |
| CN102914384A (en) * | 2012-10-19 | 2013-02-06 | 武汉烽火富华电气有限责任公司 | Temperature detection method based on passive wireless surface acoustic wave temperature sensor |
| CN103279777A (en) * | 2013-05-06 | 2013-09-04 | 西南交通大学 | Wireless surface acoustic wave temperature measurement system reader-writer |
| CN103267589A (en) * | 2013-05-22 | 2013-08-28 | 国家电网公司 | Wireless passive temperature real-time monitoring system |
| CN203672515U (en) * | 2014-01-17 | 2014-06-25 | 珠海赛迪生电气设备有限公司 | Passive wireless type on-line temperature measurement system |
| CN103868618A (en) * | 2014-03-03 | 2014-06-18 | 上海交通大学 | Multi-sensor recognition-based temperature detection system |
| EP3176550A1 (en) * | 2014-08-02 | 2017-06-07 | Mesnac Co., Ltd. | Surface-acoustic wave resonator type vibration sensor and vibration detection system |
| CN104990625A (en) * | 2015-06-18 | 2015-10-21 | 电子科技大学 | Wireless test circuit of resonant type surface acoustic wave sensor and test method |
| CN107576345A (en) * | 2017-07-21 | 2018-01-12 | 南京航空航天大学 | The wireless measuring system and measuring method of multinode resonator type surface acoustic wave sensor |
Non-Patent Citations (3)
| Title |
|---|
| JINYOUNG KIM 等: "Concrete temperature monitoring using passive wireless surface acoustic wave sensor system", 《SENSORS AND ACTUATORS A: PHYSICAL》 * |
| 王睿 等: "谐振型SAW无线无源传感器的测试系统研究", 《压电与声光》 * |
| 钟悦芸 等: "基于功率检波技术的声表面波标签识别方法", 《压电与声光》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426137A (en) * | 2019-08-12 | 2019-11-08 | 国网河南省电力公司新乡供电公司 | A kind of temperature checking method, device, system and computer readable storage medium |
| CN110736557A (en) * | 2019-10-24 | 2020-01-31 | 深圳市三和电力科技有限公司 | data collector for passive wireless temperature transmission measuring system |
| CN112527029A (en) * | 2020-12-07 | 2021-03-19 | 上海卫星工程研究所 | Wireless passive temperature control system applied to satellite thermal control system |
| CN112527029B (en) * | 2020-12-07 | 2022-03-18 | 上海卫星工程研究所 | Wireless passive temperature control system applied to satellite thermal control system |
| CN112617787A (en) * | 2020-12-16 | 2021-04-09 | 东南大学 | Passive wireless heart rhythm monitoring system based on radio frequency surface acoustic wave sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108344800B (en) | 2020-04-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108344800A (en) | System for detecting temperature based on wireless passive sonic surface wave sensor and receive-transmit system | |
| CN105022033B (en) | Radar installations and control method | |
| RU2371734C2 (en) | Marker of radio frequency identification of object and system and method for detection of coordinates and control of objects | |
| CN101897117B (en) | Improvements in and relating to logarithmic detectors | |
| CN107576345B (en) | wireless measurement system and measurement method of multi-node resonance type surface acoustic wave sensor | |
| CN103107965B (en) | Airborne interference synthetic aperture radar (SAR) multichannel broadband receiver amplitude phase compensation method and device | |
| JP2009537821A (en) | System and method for interrogating a surface acoustic wave device via a direct physical connection | |
| EP1989665B1 (en) | Device and method for analysing radio-frequency systems | |
| CN103777073B (en) | Wide-band excitation SAW device resonant frequency measurement apparatus and method | |
| CN106643873A (en) | Partial discharge and temperature composite detection system and method | |
| CN114217279A (en) | Portable radar transponder tester and testing method | |
| CN104990625B (en) | A kind of the wireless test circuit and test method of resonator type surface acoustic wave sensor | |
| US4139834A (en) | Ultrasonic wave transmitter/receiver | |
| CN107192473B (en) | Surface acoustic wave temperature detection system and detection method based on phased array antenna | |
| CN105099503A (en) | Pulse compression method of CHIRP signals, and wireless signal transceiver thereof | |
| EP0986836B1 (en) | Communications device | |
| CN2522873Y (en) | Surface acoustic wave passive wireless multi-sensor signal receiving and processing apparatus | |
| CN110613457A (en) | Detection method and device | |
| KR100752679B1 (en) | Acoustic array sensor system having single intermediate frequency amplifier | |
| CN110208371A (en) | A kind of surface acoustic wave sensor node structure and measurement method measuring soil moisture content | |
| RU71449U1 (en) | LABEL FOR RADIO FREQUENCY IDENTIFICATION OF THE OBJECT AND SYSTEM FOR DETERMINING COORDINATES AND CONTROL OF OBJECTS | |
| CN103696766B (en) | The measurement apparatus of a kind of resistivity logging while drilling and measuring method thereof | |
| CN110441621A (en) | Measurement method, device, equipment and the storage medium of noise coefficient | |
| CN110417421A (en) | A kind of unmanned controller detecting system and its method for detecting | |
| CN104390726A (en) | Passive wireless temperature measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |