CN206460280U - A kind of vibrating wire acquirer diagnosed with vibrating wire sensor - Google Patents
A kind of vibrating wire acquirer diagnosed with vibrating wire sensor Download PDFInfo
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- CN206460280U CN206460280U CN201621400386.6U CN201621400386U CN206460280U CN 206460280 U CN206460280 U CN 206460280U CN 201621400386 U CN201621400386 U CN 201621400386U CN 206460280 U CN206460280 U CN 206460280U
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Abstract
The utility model is related to a kind of vibrating wire acquirer diagnosed with vibrating wire sensor, and industry is monitored applied to structure safety and Health.It includes vibrating wire sensor, signal conditioning circuit, signal acquisition circuit, STM32 SCM systems, storage circuit, RTC clock circuit, exciting circuit, RS485 communication modules and vibrating wire sensor diagnostic circuit；Signal conditioning circuit and signal acquisition circuit connection, signal acquisition circuit are connected with the I/O port of STM32 SCM systems, and STM32 SCM systems control exciting circuit by pin, and connect storage circuit, and pass through I2C buses connect RTC clock circuit；RS485 communication modules are connected with STM32 SCM systems by serial ports controller.The result that the utility model is diagnosed according to vibrating wire sensor is operated, it is to avoid vibrating wire acquirer sends damage of the pumping signal to vibrating wire acquirer and vibrating wire sensor, improves the reliability of vibrating wire acquirer.
Description
Technical field
The utility model is related to a kind of vibrating wire acquirer diagnosed with vibrating wire sensor, applied to structure safety and Health prison
Survey 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.By
Directly export the natural frequency of vibration signal of vibratory string in vibrating wire sensor, therefore, with strong antijamming capability, by electrical parameter influenceed it is small,
Zero drift is small, the features such as be affected by temperature small, stable and reliable for performance, vibration resistance, long lifespan.Vibrating wire sensor is used extensively
In engineering, the long term monitoring project of scientific research.Vibrating wire acquirer is the instrument and equipment for gathering vibrating wire sensor, mainly by swashing
Shake the part such as circuit, signal acquisition circuit, temperature collection circuit, data processing composition.The excitation that usual Acquisition Instrument passes through frequency sweep
Method encourages vibrating wire sensor, after exciting, Acquisition Circuit collection induced signal, and by AD conversion after, single-chip microcomputer, which passes through, to be calculated
Draw the frequency of signal.
, it is necessary to first send high pressure activation signal to vibrating wire sensor coil when vibrating wire acquirer gathers vibrating wire sensor, when
After string wire starting of oscillation, Acquisition Circuit pick-up winding induced signal calculates sensor frequency and signal amplitude, so as to complete a vibratory string
Sensor is gathered.When vibrating wire sensor is normal, the high-voltage signal that vibrating wire acquirer is sent passes through coil, is then return to vibratory string collection
Instrument, forms a complete excitation loop.But when vibrating wire sensor is abnormal, now vibrating wire acquirer is sent to vibrating wire sensor
High pressure activation signal, may damage vibrating wire sensor and vibrating wire acquirer.
The content of the invention
For it is above-mentioned the problem of, the utility model patent provide it is a kind of with diagnosis vibrating wire sensor function vibratory string adopt
Collect instrument, during collection vibrating wire sensor, can first diagnose vibrating wire sensor state before pumping signal is sent, then adopted
Collection, it is to avoid the high-voltage signal of transmission produces damage to vibrating wire sensor and vibrating wire acquirer.
The utility model to achieve these goals, is adopted the following technical scheme that：
A kind of vibrating wire acquirer diagnosed with vibrating wire sensor, it includes vibrating wire sensor, signal conditioning circuit, signal
Acquisition Circuit, STM32 SCM systems, storage circuit, RTC clock circuit, exciting circuit, RS485 communication modules and vibratory string are passed
Sensor diagnostic circuit；
Signal conditioning circuit and signal acquisition circuit connection, the I/O port of signal acquisition circuit and STM32 SCM systems connect
Connect, STM32 SCM systems control exciting circuit by pin, and connect storage circuit, and pass through I2When C buses connect RTC
Clock circuit；
RS485 communication modules are connected with STM32 SCM systems by serial ports controller.
Vibrating wire sensor diagnostic circuit is made up of light coupling relay, signal relay, DC5V power supplys and resistance I；
DC5V power supplys are connected to signal conditioning circuit during the light coupling relay control diagnosis vibrating wire sensor.
When gathering vibrating wire sensor, STM32 SCM system control signals relay access vibrating wire sensor, simultaneously
The control light coupling relay conducting of STM32 SCM systems, after conducting, DC5V power supplys can be connected to vibratory string sensing by resistance I
Device, if vibrating wire sensor is abnormal, DC5V power supplys form loop by resistance II and resistance III, if normally, DC5V power supplys
Then by resistance I and vibrating wire sensor formation loop；
STM32 SCM systems read the magnitude of voltage between resistance II and resistance III, according to the difference of magnitude of voltage, then can be with
Judge the state of vibrating wire sensor.
The coil resistance of the vibrating wire sensor of collection is between the Ω of 180 Ω ~ 200.
Exciting circuit is made up of high-pressure modular, and high-pressure modular is controlled by STM32 single-chip microcomputers, can export 30V high pressures,
STM32 SCM systems control high-pressure modular to send by I/O pin, when to be gathered, single-chip microcomputer control High voltage output, excitation
Vibrating wire sensor.STM32 SCM systems can select two kinds of different energisation modes, and respectively resonance excitation swashs with multiple-pulse
Encourage, for the weaker sensor of live amplitude signal, can select to encourage by the way of resonance excitation, produce sensor
Resonance, can make cell winding sense larger signal, be easy to collection.
Signal conditioning circuit is made up of filter circuit and amplifying circuit.When sensor is gathered, vibrating wire sensor signal is very
It is faint, after filtering after circuit and amplifying circuit, situ part interference signal is filtered out first, then vibrating wire sensor is sensed
Signal amplifies, and the signal of collection is met the input requirements of signal acquisition circuit.Signal acquisition circuit uses 16 independent ADC,
Sensor input signal is changed into data signal.
STM32 SCM systems are to the Digital Signal Processing of input, TTF algorithms built in single-chip microcomputer, by signal acquisition circuit
The time-domain signal of input 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,
STM32 single-chip microcomputer Control peripheral circuits, gather vibrating wire sensor temperature, after the completion of collection, and a data acquisition is completed.
RS485 communication modules are connected with STM32 SCM systems by serial ports controller, vibrating wire acquirer collection completion
Afterwards, gathered data is sent to RS485 communication modules, by the wireless data transmission equipment DTU above 485 buses, data sent
To cloud platform storage displaying.
Storage circuit is constituted using 32M storage chips, small files system built in STM32 single-chip microcomputers, for managing storage
Data.STM32 SCM systems are connected with storage circuit by I/O port pin.When data acquisition, STM32 SCM systems are same
When gather RTC clock time, when the data of collection are sent to RS485 communication modules, while saving the data in storage circuit
In, it is ensured that the reliability of data.Storage circuit can preserve a large amount of gathered datas using circulation storage mode.
The utility model realization principle：A kind of vibrating wire acquirer diagnosed with vibrating wire sensor, mainly by STM32 monolithics
Machine system, exciting circuit, signal conditioning circuit, signal acquisition circuit, storage circuit, power circuit, telecommunication circuit, RTC clock
Circuit and vibrating wire sensor diagnostic circuit composition.Wherein, SCM system is to use STM32 single-chip microcomputers, STM32 monolithic bodies
Product is small, and low in energy consumption, in the case of being operated in low-power consumption, operating current only has 50uA or so, and resource built in single-chip microcomputer is more, convenient single
Control of the piece machine system to each several part logic circuit.Exciting circuit uses 30V high-pressure modulars, by transistor controls break-make, makes
It can be encouraged before collection vibrating wire sensor to cell winding.Signal conditioning circuit includes filter circuit and amplifying circuit,
Filter circuit can make 300Hz to 5000Hz signal normal through.The effect of amplifying circuit is by faint vibrating wire sensor
Signal is amplified to the signal that signal acquisition circuit can be recognized.Storage circuit can be stored data in locally, it is to avoid data are lost
Lose, it is ensured that the continuity of data.Telecommunication circuit is made up of RS485, by RS485 chips, can be by Multichannel vibrating wire acquirer
It is connected to live 485 bus.RTC clock circuit is connected with STM32 SCM systems, when providing collection for vibrating wire sensor collection
Between, electric power management circuit provides system working power by outside DC12V power supplys, and after power management module is handled, to be
The modules of system provide power management.Vibrating wire sensor diagnostic circuit by DC5V power supplys, light coupling relay, signal relay and
Some capacitance resistance ware compositions.When gathering vibrating wire sensor, STM32 SCM systems control vibrating wire sensor diagnostic circuit to shaking
Chord sensor is diagnosed, if it is determined that vibrating wire sensor is normal, is then transmitted pumping signal operation, otherwise will stop adopting
Collection.
The beneficial effects of the utility model：
When the utility model solves the collection of structural safety monitoring industry vibrating wire acquirer, there is exception in vibrating wire sensor,
Vibrating wire sensor state can be diagnosed automatically, the result diagnosed according to vibrating wire sensor is operated, it is to avoid vibrating wire acquirer hair
Damage of the pumping signal to vibrating wire acquirer and vibrating wire sensor is sent, the reliability of vibrating wire acquirer is improved.
Brief description of the drawings
Fig. 1 is the utility model internal electric connection diagram；
Fig. 2 vibrating wire sensor diagnostic circuit schematic diagrames.
Embodiment
A kind of vibrating wire acquirer diagnosed with vibrating wire sensor, including vibrating wire sensor 1, signal conditioning circuit 2, signal
Acquisition Circuit 3, STM32 SCM systems 4, storage circuit 6, RTC clock circuit 7, exciting circuit 9, the He of RS485 communication modules 8
Vibrating wire sensor diagnostic circuit 5 is constituted.
Exciting circuit 9 is made up of high-pressure modular, and high-pressure modular is controlled by STM32 single-chip microcomputers, can export 30V high pressures,
STM32 SCM systems 4 control high-pressure modular to send by I/O pin, when to be gathered, single-chip microcomputer control High voltage output, excitation
Vibrating wire sensor 1.STM32 SCM systems 4 can select two kinds of different energisation modes, respectively resonance excitation and multiple-pulse
Excitation, for the weaker sensor of live amplitude signal, can select to encourage by the way of resonance excitation, produce sensor
Raw resonance, can make cell winding sense larger signal, be easy to collection.
Signal conditioning circuit 2 is made up of filter circuit and amplifying circuit, and when sensor is gathered, the signal of vibrating wire sensor 1 is non-
It is often faint, after filtering after circuit and amplifying circuit, situ part interference signal is filtered out first, then by vibrating wire sensor 1
Induced signal amplifies, and the signal of collection is met the input requirements of signal acquisition circuit 3.Signal acquisition circuit 3 is only using 16
Vertical ADC, data signal is changed into by sensor input signal.
The Digital Signal Processing of 4 pairs of inputs of STM32 SCM systems, TTF algorithms built in single-chip microcomputer, by signal acquisition circuit
The time-domain signal of 3 inputs is converted to frequency domain.After the completion of FFT is calculated, the frequency values and signal amplitude of vibrating wire sensor 1 are drawn.Together
When, the Control peripheral circuit of STM32 single-chip microcomputers 4 gathers vibrating wire sensor temperature, after the completion of collection, and a data acquisition is completed.
RS485 communication modules 8 are connected with STM32 SCM systems 4 by serial ports controller, and vibrating wire acquirer collection is completed
Afterwards, gathered data is sent to RS485 communication modules 8, by the wireless data transmission equipment DTU above 485 buses, data sent out
Deliver to cloud platform storage displaying.
Storage circuit 6 is using 32M storage chips composition, small files system built in STM32 single-chip microcomputers, for managing storage
Data.STM32 SCM systems 4 are connected with storage circuit 6 by I/O port pin.When data acquisition, STM32 SCM systems
The time of RTC clock 7 is gathered simultaneously, when the data of collection are sent to RS485 communication modules 8, while saving the data in storage
In circuit 6, it is ensured that the reliability of data.Storage circuit 6 can preserve a large amount of gathered datas using circulation storage mode.
Vibrating wire sensor diagnostic circuit 5 is by I 12 groups of light coupling relay 10, signal relay 13, DC5V power supplys 11 and resistance
Into.When gathering vibrating wire sensor 1, the control signal relay 13 of STM32 SCM systems 4 access vibrating wire sensor 1, simultaneously
The control of STM32 SCM systems 4 light coupling relay 10 is turned on, and after conducting, DC5V power supplys 11 can be connected to by resistance I 12 to shake
Chord sensor, if vibrating wire sensor 1 is abnormal, DC5V power supplys 11 form loop by resistance II 14 and resistance III 15, if
Normally, DC5V power supplys are then by resistance I 12 and the formation of vibrating wire sensor 1 loop.STM32 SCM systems 4 read resistance II 14
Magnitude of voltage between resistance III 15, according to the difference of magnitude of voltage, then may determine that the state of vibrating wire sensor 1.
Claims (7)
1. a kind of vibrating wire acquirer diagnosed with vibrating wire sensor, it is characterised in that：It includes vibrating wire sensor（1）, signal
Modulate circuit（2）, signal acquisition circuit（3）, STM32 SCM systems（4）, storage circuit（6）, RTC clock circuit（7）, swash
Encourage circuit（9）, RS485 communication modules（8）With vibrating wire sensor diagnostic circuit（5）；
Signal conditioning circuit（2）And signal acquisition circuit（3）Connection, signal acquisition circuit（3）With STM32 SCM systems（4）
I/O port connection, STM32 SCM systems（4）Exciting circuit is controlled by pin, and connects storage circuit（6）, and pass through I2C
Bus connects RTC clock circuit（7）；
RS485 communication modules（8）With STM32 SCM systems（4）Connected by serial ports controller.
2. the vibrating wire acquirer according to claim 1 diagnosed with vibrating wire sensor, it is characterised in that：Vibrating wire sensor
Diagnostic circuit（5）By light coupling relay（10）, signal relay（13）, DC5V power supplys（11）With resistance I（12）Composition；
The light coupling relay（10）Control diagnosis vibrating wire sensor（1）When by DC5V power supplys（11）It is connected to signal conditioning circuit
（2）.
3. the vibrating wire acquirer according to claim 2 diagnosed with vibrating wire sensor, it is characterised in that：
Gather vibrating wire sensor（1）When, STM32 SCM systems（4）Control signal relay（13）Access vibrating wire sensor
（1）, while STM32 SCM systems（4）Control light coupling relay（10）Conducting, after conducting, DC5V power supplys（11）It can pass through
Resistance I（12）Vibrating wire sensor is connected to, if vibrating wire sensor（1）It is abnormal, then DC5V power supplys（11）By resistance II（14）
With resistance III（15）Loop is formed, if normally, DC5V power supplys then pass through resistance I（12）And vibrating wire sensor（1）Form loop；
STM32 SCM systems（4）Read resistance II（14）With resistance III（15）Between magnitude of voltage, according to magnitude of voltage not
Together, then it may determine that vibrating wire sensor（1）State.
4. the vibrating wire acquirer according to claim 1 diagnosed with vibrating wire sensor, it is characterised in that：The vibratory string of collection
Sensor（1）Coil resistance between the Ω of 180 Ω ~ 200.
5. the vibrating wire acquirer according to claim 1 diagnosed with vibrating wire sensor, it is characterised in that：Exciting circuit
（9）It is made up of high-pressure modular, high-pressure modular is controlled by STM32 single-chip microcomputers.
6. the vibrating wire acquirer according to claim 1 diagnosed with vibrating wire sensor, it is characterised in that：Signal condition electricity
Road（2）It is made up of filter circuit and amplifying circuit.
7. the vibrating wire acquirer according to claim 1 diagnosed with vibrating wire sensor, it is characterised in that：RS485 communicates
Module（8）With STM32 SCM systems（4）Connected by serial ports controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621400386.6U CN206460280U (en) | 2016-12-20 | 2016-12-20 | A kind of vibrating wire acquirer diagnosed with vibrating wire sensor |
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| CN201621400386.6U CN206460280U (en) | 2016-12-20 | 2016-12-20 | A kind of vibrating wire acquirer diagnosed with vibrating wire sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773967A (en) * | 2016-12-20 | 2017-05-31 | 江西飞尚科技有限公司 | A kind of vibrating wire acquirer with vibrating wire sensor diagnosis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773967A (en) * | 2016-12-20 | 2017-05-31 | 江西飞尚科技有限公司 | A kind of vibrating wire acquirer with vibrating wire sensor diagnosis |
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