CN106600924A - Wireless multichannel vibration wire acquisition instrument and acquisition method thereof - Google Patents
Wireless multichannel vibration wire acquisition instrument and acquisition method thereof Download PDFInfo
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- CN106600924A CN106600924A CN201610712348.2A CN201610712348A CN106600924A CN 106600924 A CN106600924 A CN 106600924A CN 201610712348 A CN201610712348 A CN 201610712348A CN 106600924 A CN106600924 A CN 106600924A
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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Abstract
The invention relates to a wireless multichannel vibration wire acquisition instrument and an acquisition method thereof, and is applied to structure safety health monitoring industry. The instrument comprises a channel chip selection plate, a signal conditioning circuit, a signal acquisition circuit, a single-chip microcomputer system, a storage circuit, an exciting circuit, a RTC circuit, a zigbee wireless communication module and a vibration wire sensor. The method solves the on-site deployment problems of the multichannel vibration wire acquisition instrument and the vibration wire sensor in structure safety monitoring industry, wireless mode is used, on-site wiring is reduced, some on-site complex construction environments are solved, and construction cost is reduced.
Description
Technical field
The present invention relates to a kind of wireless multi-channel vibrating wire acquirer and its acquisition method, are applied to the monitoring of structure safety and Health
Industry.
Background technology
Vibrating string type sensor is the sensor of domestic and international most attention and a kind of wide variety of non-electricity measure at present.Due to shaking
Chord sensor directly exports the natural frequency of vibration signal of vibratory string, therefore, affected little, zero point with strong antijamming capability, by electrical quantity
Drift is little, temperature influence is little, stable and reliable for performance, vibration resistance, life-span length the features such as.Vibrating wire sensor is widely used for work
In journey, the long term monitoring project of scientific research.Vibrating wire acquirer is the instrument and equipment for gathering vibrating wire sensor, is made in current engineering
Multichannel vibrating wire acquirer typically adopts mains-supplied, which substantially increases field deployment difficulty, it is desirable to multichannel vibratory string
Acquisition Instrument is disposed indoors or by consumer unit, and such vibrating wire sensor has to pass through long cable and accesses vibrating wire acquirer, and vibratory string is passed
Sensor belongs to small-signal, and the prolongation of cable can cause the decay of signal, and might have other interference signals to introduce,
Affect data acquisition.Because Multichannel vibrating wire acquirer accesses monitoring system with RS485 buses, gathered by control centre's control,
Now Multichannel vibrating wire acquirer must be constantly in working condition, can just timely respond to acquisition, and this working method makes
Obtain Multichannel vibrating wire acquirer power consumption excessive.
The content of the invention
For above-mentioned problem, the invention provides a kind of wireless multi-channel vibrating wire acquirer and its acquisition method, reduce
The power consumption of Multichannel vibrating wire acquirer, allows the Multichannel vibrating wire acquirer dispose at an arbitrary position, solves field deployment
A difficult difficult problem, improves the efficiency of field deployment.
The present invention to achieve these goals, is adopted the following technical scheme that：
A kind of wireless multi-channel vibrating wire acquirer, it selects plate, signal conditioning circuit, signal acquisition circuit, monolithic including dust piece
Machine system, storage circuit, exciting circuit, RTC circuit, zigbee wireless communication modules and vibrating wire sensor；
Above-mentioned dust piece selects plate to select controller and relay group into it is 4 passages that each piece selects plate by piece；
Dust piece selects plate to be connected by CAN with Single Chip Microcomputer (SCM) system, and vibrating wire sensor selects the air plug of plate to be connected with dust piece.
Exciting circuit is made up of high-pressure modular, and high-pressure modular is connected with Single Chip Microcomputer (SCM) system；
Single Chip Microcomputer (SCM) system is connected with storage circuit by I/O port pin；
Zigbee wireless communication modules are connected with Single Chip Microcomputer (SCM) system；
RTC circuit is connected with Single Chip Microcomputer (SCM) system；
Signal conditioning circuit is connected with signal acquisition circuit, and signal acquisition circuit is connected with Single Chip Microcomputer (SCM) system.
A kind of acquisition method of wireless multi-channel vibratory string：
Dust piece selects plate to select controller and relay group into it is 4 passages that each piece selects plate, and Multichannel vibrating wire acquirer can by piece
Plate is selected to connect multiple 4 dust pieces, the Multichannel vibrating wire acquirer with 4 as multiple is constituted, dust piece selects plate and Single Chip Microcomputer (SCM) system
Connected by CAN, it is ensured that communication reliability, vibrating wire sensor selects the air plug of plate to be connected with dust piece；
Exciting circuit is made up of high-pressure modular, and, by Single-chip Controlling, output voltage, single-chip microcomputer is by I/O pin control for high-pressure modular
High-pressure modular sends, and during collection, Single-chip Controlling voltage output encourages vibrating wire sensor；Single-chip microcomputer can select two kinds of differences
Energisation mode, respectively resonance excitation and multi-pulse excitation；
Signal conditioning circuit is made up of filter circuit and amplifying circuit, and during sensor acquisition, vibrating wire sensor signal is very faint,
After filtering after circuit and amplifying circuit, situ part interference signal is filtered first, then amplifies vibrating wire sensor signal,
The signal for making collection meets the input requirements of signal acquisition circuit；Signal acquisition circuit adopts 16 independent ADC, and sensor is defeated
Enter signal and be changed into digital signal；
Digital Signal Processing of the Single Chip Microcomputer (SCM) system to input, the built-in TTF algorithms of single-chip microcomputer, the time domain that signal acquisition circuit is input into
Signal is converted to frequency domain；After the completion of FFT is calculated, the frequency values and signal amplitude of vibrating wire sensor are drawn；Meanwhile, Single-chip Controlling
Peripheral circuit, gathers vibrating wire sensor temperature, and after the completion of collection, a data acquisition is completed；
RTC circuit is made up of clock chip, the external button cell of chip, it is ensured that after Multichannel vibrating wire acquirer power down, clock letter
Breath will not be lost；RTC circuit arranges alarm clock, and after alarm clock is triggered, the output pin of clock chip exports a signal to monolithic
Machine, single-chip microcomputer is waken up from resting state, makes single-chip microcomputer start working, and after the completion of collection, single-chip microcomputer reenters dormancy, next time
Again work is waken up by RTC circuit, so can ensure that system is operated in low-power consumption mode；
Zigbee communication module is connected with Single Chip Microcomputer (SCM) system by serial ports controller；Zigbee communication module and others zigbee
Module constitutes zigbee wireless networks；After Multichannel vibrating wire acquirer collection is completed, gathered data is sent to zigbee and is led to
Letter module, zigbee communication modules send data to server by zigbee network；
Storage circuit is constituted using storage chip, the built-in small files system of single-chip microcomputer, for managing data storage；Single-chip microcomputer system
System is connected with storage circuit by I/O port pin；When data acquisition is completed, when data is activation is to zigbee communication modules, while will
Data are stored in storage circuit, it is ensured that the reliability of data；Storage circuit can be preserved and adopted in a large number using circulation storage mode
Collection data.
The present invention realizes principle：A kind of wireless multi-channel vibrating wire acquirer, mainly by Single Chip Microcomputer (SCM) system, exciting circuit, letter
Number modulate circuit, signal acquisition circuit, storage circuit, power circuit, telecommunication circuit, RTC circuit, dust piece select plate to constitute.Swash
Encourage circuit and adopt high-pressure modular, by transistor controls break-make so as to can be before collection vibrating wire sensor to cell winding
Excitation.Signal conditioning circuit includes filter circuit and amplifying circuit, and filter circuit can make the signal of 300Hz to 5000Hz normal
Pass through.The effect of amplifying circuit is that faint vibrating wire sensor signal is amplified to into the signal that signal acquisition circuit can be recognized.
Storage circuit can be stored data in locally, it is to avoid loss of data, it is ensured that the seriality of data.Power supply is supplied using accumulator
Electricity, internal electric source control circuit provides working power for modules, meanwhile, Multichannel vibrating wire acquirer is externally connected to the sun
Energy charging panel, in the case where there is illumination condition, can charge for accumulator, and charging current is by charge management circuit control.So can be with
Multichannel vibrating wire acquirer is set to work in the wild for a long time, without the need for field personnel's management.RTC circuit provides standard for whole system
The true time, while alarm clock function can also be exported, with timing wake-up STM32 single-chip microcomputer single-chip microcomputer can be made to call out from low power consumpting state
Wake up, carry out data acquisition, after the completion of collection, whole system is again introduced into low power consumpting state, to reduce system power dissipation.Telecommunication circuit
By zigbee module compositions, zigbee modules can constitute zigbee network with zigbee coordinators, and Multichannel vibrating wire acquirer can
Data are uploaded onto the server by zigbee network.It is passage expander that piece selects plate, can be according to spot sensor quantity, spirit
Accommodation number of channels living, meets field deployment situation.During field deployment Multichannel vibrating wire acquirer, balanced each vibratory string can be considered
Sensor after selecting optimal location, fixes deployment to the cable length of vibrating wire acquirer.
Beneficial effects of the present invention:
The present invention solves the problems, such as structural safety monitoring industry Multichannel vibrating wire acquirer and vibrating wire sensor field deployment, passes through
Wirelessly, field wiring is reduced, the complicated construction environment in some scenes can be solved, reduce construction cost.
Description of the drawings
Fig. 1 is the structural schematic block diagram of the present invention.
Specific embodiment
Describe the present invention below in conjunction with the accompanying drawings：
A kind of wireless multi-channel vibrating wire acquirer, it selects plate 1, signal conditioning circuit 2, signal acquisition circuit 3, list including dust piece
Piece machine system 4, storage circuit 5, exciting circuit 6, RTC circuit 7, zigbee wireless communication modules 8 and vibrating wire sensor 9；
Above-mentioned dust piece selects plate 1 to select controller and relay group into it is 4 passages that each piece selects plate by piece；
Dust piece selects plate 1 to be connected by CAN with Single Chip Microcomputer (SCM) system 4, and vibrating wire sensor 9 selects the air plug of plate 1 to connect with dust piece
Connect.
Exciting circuit 6 is made up of high-pressure modular, and high-pressure modular is connected with Single Chip Microcomputer (SCM) system 4；
Single Chip Microcomputer (SCM) system 4 is connected with storage circuit 5 by I/O port pin；
Zigbee wireless communication modules 8 are connected with Single Chip Microcomputer (SCM) system 4；
RTC circuit 7 is connected with Single Chip Microcomputer (SCM) system 4；
Signal conditioning circuit 2 is connected with signal acquisition circuit 3, and signal acquisition circuit 3 is connected with Single Chip Microcomputer (SCM) system 4.
A kind of acquisition method of wireless multi-channel vibratory string：
Dust piece selects plate 1 to select controller and relay group into each piece selects plate for 4 passages, Multichannel vibrating wire acquirer by piece
Multiple 4 dust pieces can be connected and select plate, constitute the Multichannel vibrating wire acquirer with 4 as multiple, dust piece selects plate 1 and single-chip microcomputer system
System 4 is connected by CAN, it is ensured that communication reliability, vibrating wire sensor 9 selects the air plug of plate 1 to be connected with dust piece；
Exciting circuit 6 is made up of high-pressure modular, and high-pressure modular passes through I/O pin control by Single-chip Controlling, output voltage, single-chip microcomputer
High-pressure modular processed sends, and during collection, Single-chip Controlling voltage output encourages vibrating wire sensor；Single-chip microcomputer can select two kinds not
Same energisation mode, respectively resonance excitation and multi-pulse excitation；
Signal conditioning circuit 2 is made up of filter circuit and amplifying circuit, and during sensor acquisition, vibrating wire sensor signal is very micro-
It is weak, after filtering after circuit and amplifying circuit, situ part interference signal is filtered first, then vibrating wire sensor signal is put
Greatly, the signal for making collection meets the input requirements of signal acquisition circuit 3；Signal acquisition circuit 3 adopts 16 independent ADC, will pass
Sensor input signal is changed into digital signal；
The Digital Signal Processing of the input of Single Chip Microcomputer (SCM) system 4 pairs, the built-in TTF algorithms of single-chip microcomputer, by signal acquisition circuit 3 be input into when
Domain signal is converted to frequency domain；After the completion of FFT is calculated, the frequency values and signal amplitude of vibrating wire sensor are drawn；Meanwhile, single-chip microcomputer 4
Control peripheral circuit, gathers vibrating wire sensor temperature, and after the completion of collection, a data acquisition is completed；
RTC circuit 7 is made up of clock chip, the external button cell of chip, it is ensured that after Multichannel vibrating wire acquirer power down, clock letter
Breath will not be lost；RTC circuit 7 arranges alarm clock, and after alarm clock is triggered, the output pin of clock chip exports a signal to monolithic
Machine, single-chip microcomputer is waken up from resting state, makes single-chip microcomputer start working, and after the completion of collection, single-chip microcomputer reenters dormancy, next time
Again work is waken up by RTC circuit, so can ensure that system is operated in low-power consumption mode；
Zigbee communication module 8 is connected with Single Chip Microcomputer (SCM) system 4 by serial ports controller；Zigbee communication module 8 and others
Zigbee modules constitute zigbee wireless networks；Multichannel vibrating wire acquirer collection complete after, by gathered data send to
Zigbee communication modules 8, zigbee communication modules 8 send data to server by zigbee network；
Storage circuit 5 is constituted using storage chip, the built-in small files system of single-chip microcomputer, for managing data storage；Single-chip microcomputer
System 4 is connected with storage circuit 5 by I/O port pin；When data acquisition is completed, when data is activation is to zigbee communication modules 8,
Save the data in storage circuit 5 simultaneously, it is ensured that the reliability of data；Storage circuit 5 is using circulation storage mode, Ke Yibao
Deposit a large amount of gathered datas.
Claims (2)
1. a kind of wireless multi-channel vibrating wire acquirer, it is characterised in that：It selects plate including dust piece（1）, signal conditioning circuit
（2）, signal acquisition circuit（3）, Single Chip Microcomputer (SCM) system（4）, storage circuit（5）, exciting circuit（6）, RTC circuit（7）, zigbee without
Line communication module（8）With vibrating wire sensor（9）；
Above-mentioned dust piece selects plate（1）Controller and relay group are selected into it is 4 passages that each piece selects plate by piece；
Dust piece selects plate（1）With Single Chip Microcomputer (SCM) system（4）Connected by CAN, vibrating wire sensor（9）Plate is selected with dust piece（1）
Air plug connection;
Exciting circuit（6）It is made up of high-pressure modular, high-pressure modular and Single Chip Microcomputer (SCM) system（4）Connection；
Single Chip Microcomputer (SCM) system（4）With storage circuit（5）Connected by I/O port pin；
Zigbee wireless communication modules（8）With Single Chip Microcomputer (SCM) system（4）Connection；
RTC circuit（7）With Single Chip Microcomputer (SCM) system（4）Connection；
Signal conditioning circuit（2）With signal acquisition circuit（3）Connection, signal acquisition circuit（3）With Single Chip Microcomputer (SCM) system（4）Connection.
2. a kind of acquisition method of wireless multi-channel vibratory string, the method is characterized in that：
Dust piece selects plate（1）Controller and relay group are selected into each piece selects plate for 4 passages, the collection of multichannel vibratory string by piece
Instrument can connect multiple 4 dust pieces and select plate, constitute the Multichannel vibrating wire acquirer with 4 as multiple, and dust piece selects plate（1）With monolithic
Machine system（4）Connected by CAN, it is ensured that communication reliability, vibrating wire sensor（9）Plate is selected with dust piece（1）Air plug connect
Connect；
Exciting circuit（6）It is made up of high-pressure modular, high-pressure modular passes through I/O pin by Single-chip Controlling, output voltage, single-chip microcomputer
Control high-pressure modular sends, and during collection, Single-chip Controlling voltage output encourages vibrating wire sensor；Single-chip microcomputer can select two kinds
Different energisation modes, respectively resonance excitation and multi-pulse excitation；
Signal conditioning circuit（2）It is made up of filter circuit and amplifying circuit, during sensor acquisition, vibrating wire sensor signal is very micro-
It is weak, after filtering after circuit and amplifying circuit, situ part interference signal is filtered first, then vibrating wire sensor signal is put
Greatly, the signal for making collection meets signal acquisition circuit（3）Input requirements；Signal acquisition circuit（3）Using 16 independent ADC,
Sensor input signal is changed into into digital signal；
Single Chip Microcomputer (SCM) system（4）To the Digital Signal Processing being input into, the built-in TTF algorithms of single-chip microcomputer, by signal acquisition circuit（3）Input
Time-domain signal be converted to frequency domain；After the completion of FFT is calculated, the frequency values and signal amplitude of vibrating wire sensor are drawn；Meanwhile, monolithic
Machine（4）Control peripheral circuit, gathers vibrating wire sensor temperature, and after the completion of collection, a data acquisition is completed；
RTC circuit（7）It is made up of clock chip, the external button cell of chip, it is ensured that after Multichannel vibrating wire acquirer power down, clock
Information will not lose；RTC circuit（7）Alarm clock is set, and after alarm clock is triggered, the output pin of clock chip exports a signal and arrives
Single-chip microcomputer, single-chip microcomputer is waken up from resting state, makes single-chip microcomputer start working, and after the completion of collection, single-chip microcomputer reenters dormancy,
Next time wakes up work by RTC circuit again, so can ensure that system is operated in low-power consumption mode；
Zigbee communication module（8）With Single Chip Microcomputer (SCM) system（4）Connected by serial ports controller；Zigbee communication module（8）With it
His zigbee modules composition zigbee wireless networks；After Multichannel vibrating wire acquirer collection is completed, gathered data is sent
To zigbee communication modules（8）, zigbee communication modules（8）Server is sent data to by zigbee network；
Storage circuit（5）Constituted using storage chip, the built-in small files system of single-chip microcomputer, for managing data storage；Monolithic
Machine system（4）With storage circuit（5）Connected by I/O port pin；When data acquisition is completed, data is activation is to zigbee communication moulds
Block（8）When, while saving the data in storage circuit（5）In, it is ensured that the reliability of data；Storage circuit（5）Deposited using circulation
Storage mode, can preserve a large amount of gathered datas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610712348.2A CN106600924A (en) | 2016-08-24 | 2016-08-24 | Wireless multichannel vibration wire acquisition instrument and acquisition method thereof |
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| CN201610712348.2A CN106600924A (en) | 2016-08-24 | 2016-08-24 | Wireless multichannel vibration wire acquisition instrument and acquisition method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817046A (en) * | 2017-07-05 | 2018-03-20 | 广东省地质建设工程勘察院 | Portable long-range instrument of gathering of vibrating wire |
| CN110926520A (en) * | 2019-11-08 | 2020-03-27 | 中国水利水电科学研究院 | Automatic data acquisition system of low-insulation vibrating wire sensor |
| CN115900927A (en) * | 2023-02-15 | 2023-04-04 | 江西飞尚科技有限公司 | Frequency division type vibrating wire sensor and frequency measuring device and method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832752A (en) * | 2010-03-17 | 2010-09-15 | 浙江大学 | Low-power consumption vibration wire-type strain acquisition system adopting wireless sensor network technology |
| CN102426070A (en) * | 2011-12-31 | 2012-04-25 | 交通运输部公路科学研究所 | Device and method for testing along-path stress distribution state of prestressed steel beam |
| CN103685005A (en) * | 2013-12-27 | 2014-03-26 | 广西瀚特信息产业股份有限公司 | Intelligent gateway and method |
| CN104091430A (en) * | 2014-06-26 | 2014-10-08 | 华南理工大学 | Wireless communication technology-based bridge strain monitoring system and method |
| CN104868546A (en) * | 2015-05-25 | 2015-08-26 | 沈阳中科一唯电子技术有限公司 | Cell management system |
| CN205102960U (en) * | 2015-11-06 | 2016-03-23 | 江西飞尚科技有限公司 | Binary channels synchronous sampling's sucker rod load monitor |
| CN105628185A (en) * | 2015-12-28 | 2016-06-01 | 江西飞尚科技有限公司 | Vibration wire sensor triple-frequency shielding method |
-
2016
- 2016-08-24 CN CN201610712348.2A patent/CN106600924A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832752A (en) * | 2010-03-17 | 2010-09-15 | 浙江大学 | Low-power consumption vibration wire-type strain acquisition system adopting wireless sensor network technology |
| CN102426070A (en) * | 2011-12-31 | 2012-04-25 | 交通运输部公路科学研究所 | Device and method for testing along-path stress distribution state of prestressed steel beam |
| CN103685005A (en) * | 2013-12-27 | 2014-03-26 | 广西瀚特信息产业股份有限公司 | Intelligent gateway and method |
| CN104091430A (en) * | 2014-06-26 | 2014-10-08 | 华南理工大学 | Wireless communication technology-based bridge strain monitoring system and method |
| CN104868546A (en) * | 2015-05-25 | 2015-08-26 | 沈阳中科一唯电子技术有限公司 | Cell management system |
| CN205102960U (en) * | 2015-11-06 | 2016-03-23 | 江西飞尚科技有限公司 | Binary channels synchronous sampling's sucker rod load monitor |
| CN105628185A (en) * | 2015-12-28 | 2016-06-01 | 江西飞尚科技有限公司 | Vibration wire sensor triple-frequency shielding method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817046A (en) * | 2017-07-05 | 2018-03-20 | 广东省地质建设工程勘察院 | Portable long-range instrument of gathering of vibrating wire |
| CN110926520A (en) * | 2019-11-08 | 2020-03-27 | 中国水利水电科学研究院 | Automatic data acquisition system of low-insulation vibrating wire sensor |
| CN115900927A (en) * | 2023-02-15 | 2023-04-04 | 江西飞尚科技有限公司 | Frequency division type vibrating wire sensor and frequency measuring device and method thereof |
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Application publication date: 20170426 |