CN106679703A - Data reading device of vibrating wire sensor and working method of data reading device - Google Patents
Data reading device of vibrating wire sensor and working method of data reading device Download PDFInfo
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- CN106679703A CN106679703A CN201710102094.7A CN201710102094A CN106679703A CN 106679703 A CN106679703 A CN 106679703A CN 201710102094 A CN201710102094 A CN 201710102094A CN 106679703 A CN106679703 A CN 106679703A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/54—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using means specified in two or more of groups G01D5/02, G01D5/12, G01D5/26, G01D5/42, and G01D5/48
- G01D5/56—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using means specified in two or more of groups G01D5/02, G01D5/12, G01D5/26, G01D5/42, and G01D5/48 using electric or magnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
Abstract
The invention discloses a data reading device of a vibrating wire sensor. The data reading device is high in integration level, advanced in technique, small in size and diverse in interface and can be conveniently connected into an existing information network, achieve rapid transition from manual testing to full-automatic unattended operation testing, conduct validity detection and signal quality comprehensive evaluation on the sensor in the measurement process, the manual input and labor intensity are greatly reduced, the measurement efficiency is improved, and the application difficulty of the vibrating wire sensor is lowered. The data reading device comprises a direct-current pumping unit, a high-voltage sampling device, a high-voltage switch, a first lightning arrester, a low-voltage frequency sweeper, a sensor detection sampling device, a high-voltage damper, a first temperature collector, a second temperature collector, a filter follower, a filter amplifier, a detector, a central processing unit MCU, a power supply, a clock reference, a data storage, an RTC real-time clock, a controlled multi-way independent power supply, a digital interface and an analog interface. The invention further discloses a working method of the data reading device.
Description
Technical field
The invention belongs to the technical field of electronic technology and engineering monitoring, more particularly to a kind of reading of vibrating string type sensor
Fetch data device and its method of work.
Background technology
Vibrating string type sensor is also referred to as steel string type sensor, is that at present both at home and abroad most attention and wide variety of one kind are non-
The sensor of electricity electrical measurement.Steel string type sensor has simple structure, sturdy and durable, strong antijamming capability (closely), measured value
The advantages of reliable, precision and resolving power height and good stability.It is output as frequency signal (generally mV levels sine wave), extensively should
For in ground, concrete, structural steelwork test.
The general work principle of steel string type sensor is：String wire is placed in magnetic field, and string wire is swashed in a certain way
After shaking, string wire will vibrate, and the string wire of vibration makees cutting magnetic line movement in magnetic field, therefore, can be in pick-up coil
Potential is induced, the frequency of induced potential (string wire cutting magnetic line produces ultra-weak electronic signal in coil) is exactly being total to for vibratory string
Vibration frequency.From mechanics principle, the tension force or pulling force that resonant frequency and the string of a musical instrument of string wire are born is linear, therefore surveys
Obtaining the resonant frequency of string wire can obtain the level of tightness (tension stress) of string wire to be measured, using this characteristic, produce various
The change of the sensor of various kinds, such as pressure, displacement, pressure or displacement causes string wire level of tightness to change, its resonance frequency
Rate also accordingly changes, and frequency values can calculate the pressure or shift value suffered by sensor." tightening " journey of string wire
Degree is the stress state of string wire, and string wire stress meets formula with its resonant frequency
In above formula：
f：The frequency values of string wire
L：String wire length
σ：Tension stress suffered by string wire
ρ：The density of string wire material
For the string wire sensor for having completed, the length of string wire, the density of string wire material are known quantity, so,
The tension stress that string wire is subject to has one-to-one relationship with string wire resonant frequency, and tension stress is subject to the shadow of sensor external environment
Sound changes (such as pressure), so as to pass through frequency values by calculate the value of external environment condition.
This kind of sensor has two kinds of forms：One kind is twin coil, and one of coil is single coil excitement, and exciting vibratory string is by steel
Chord vibration gets up, and another is pick-up coil, and it is the induction electromotive force that the mechanical vibration of vibratory string can be converted to same frequency
Device；Another kind is unicoil, and this sensor single coil excitement and pick-up coil are same coil, and exciting and pick-up timesharing are entered
OK, first exciting, rear pick-up.Single coil vibrating sensor is mainly solved two problems using in：First, excitation method is used
Any method makes vibratory string shake；Second, the pickup of the faint electromotive force in pick-up method, including pick-up coil obtains electromotive force
Frequency and frequency measuring two parts.
Type vibration wire readout instrument is mainly solved two problems：How to allow string wire to shake and how to obtain after string wire shakes
The frequency values of generation.
Type vibration wire principle is the class sensor that current engineering field is most widely used, and sensor technology is very ripe,
Consumption is huge, and with the development of science and technology, information-based, automatization there is presently no for realizing into trend of the times
Vibrating string type sensor easily accesses the professional core part (module, transducer) that control equipment is adopted in existing informationization, makes informationization
Process can not rapidly, science, quickly realize.
The content of the invention
The present invention technology solve problem be：Overcome the deficiencies in the prior art, there is provided a kind of reading of vibrating string type sensor
Data set, its integrated level height, advanced technology, small volume, interface are various, can easily be linked into existing informatization and network, real
Now from manual testing to the fast transition of full-automatic unmanned test on duty, while can also have to sensor in measurement process
The detection of effect property, signal quality overall merit, substantially reduce artificial input and labor intensity, improve measurement efficiency, reduce and shake
The application difficulty of chord sensor.
The present invention technical solution be：The data reading device of this vibrating string type sensor, it includes that direct current is pumped
Device, high pressure sampler, high-voltage switch gear, the first lightning protection device, low pressure frescan, sensor detection sampler, high-tension damper, first
Temperature sampler, second temperature harvester, filtering follower, filter amplifier, cymoscope, central processor MCU, power supply, when
Clock benchmark, data storage, RTC real-time clocks, controlled multichannel independent current source, digital interface, analog interface；
Straightway pump depressor is connected with MCU, high-voltage acquisition device, high-voltage switch gear, realizes low-voltage to high voltage under MCU controls
Conversion, the high voltage of its output is used to send high-voltage pulse pumping signal to vibrating string type sensor；
High pressure sampler to MCU provides voltage signal；
High-voltage switch gear is connected with the High voltage output circuit of MCU and straightway pump depressor, under MCU controls,
Switch on or off the connection of high-tension line and the string wire coil in vibrating string type sensor；
First lightning protection device and the second lightning protection device transmission data, the second lightning protection device connection vibrating string type sensor；
Low pressure frescan under MCU controls, by DC low-voltage current signal with certain regular transmission to vibrating wire sensor
String wire coil, the output signal of low pressure frescan is switched between square wave and sine wave；
The high-pressure side of high-tension damper is connected with the first lightning protection device, high-voltage switch gear, low-pressure side and the sensing of high-tension damper
Device detection sampler, the first Temperature sampler, filtering follower, the connection of low pressure frescan；
First Temperature sampler is used to detect the temperature sensor in vibrating wire sensor that second temperature harvester to be used to detect
The temperature sensor of clock reference, gathers two temperature values, and the string wire natural frequency of vibration and clock reference temperature influence are carried out respectively
Frequency amendment；Second temperature harvester is installed on circuit board same position with clock reference circuit；
Filtering follower is connected with high-tension damper, filter amplifier；
Filter amplifier and MCU, filtering follower, cymoscope are connected, and filter amplifier is programmable amplifier, times magnification
Number returns primary signal quality and is arranged according to its register parameters by MCU according to sensor；
Signal amplitude detector is connected with the output of MCU, filter amplifier, the vibratory string signal amplitude after detection amplification；
Cymoscope is connected with the output of MCU, filter amplifier, and the sinusoidal signal after amplification is converted to into square-wave signal,
Giving MCU carries out signal period statistics；
Power supply, clock reference, data storage, RTC real-time clocks, controlled multichannel independent current source, digital interface, simulation connect
Mouth is connected respectively with MCU.
The present invention controls straightway pump depressor and shakes by string wire by MCU, controls high pressure sampler, low pressure by MCU and sweeps
Frequency device, sensor detection sampler, high-tension damper, the first Temperature sampler, second temperature harvester, filtering follower, filter
Twt amplifier, cymoscope come obtain after string wire shakes produce frequency values, therefore the vibrating string type sensor reading data dress
Put integrated level height, advanced technology, small volume, interface various, can easily be linked into existing informatization and network, realize from artificial survey
Try the fast transition of full-automatic unmanned test on duty, at the same also sensor can be carried out in measurement process validation checking,
Signal quality overall merit, substantially reduces artificial input and labor intensity, improves measurement efficiency, reduces vibrating wire sensor
Using difficulty.
The method of work of the data reading device of this vibrating string type sensor is additionally provided, the method is comprised the following steps：
(1) electricity on；
(2) depositor of MCU is read；
(3) judge whether to detect vibrating string type sensor, be then execution step (3), otherwise execution step (8)；
(4) according to the method excitation vibrating string type sensor of regulation；
(5) signal of vibrating string type sensor is gathered；
(6) according to the algorithm signal calculated value of regulation；
(7) judge whether signal quality is qualified, be then execution step (8), otherwise execution step (3)；
(8) output information is refreshed.
Description of the drawings
Fig. 1 shows the structural representation of the data reading device of vibrating string type sensor of the invention.
Fig. 2 shows the flow chart of the method for work of the data reading device of vibrating string type sensor of the invention.
Specific embodiment
From figure 1 it appears that the data reading device of this vibrating string type sensor, it includes straightway pump depressor, high pressure
Sampler, high-voltage switch gear, the first lightning protection device, low pressure frescan, sensor detection sampler, high-tension damper, the first temperature are adopted
Storage, second temperature harvester, filtering follower, filter amplifier, cymoscope, central processor MCU, power supply, clock reference,
Data storage, RTC real-time clocks, controlled multichannel independent current source, digital interface, analog interface；
Straightway pump depressor is connected with MCU, high-voltage acquisition device, high-voltage switch gear, realizes low-voltage to high voltage under MCU controls
Conversion, the high voltage of its output is used to send high-voltage pulse pumping signal to vibrating string type sensor；
High pressure sampler to MCU provides voltage signal；
High-voltage switch gear is connected with the High voltage output circuit of MCU and straightway pump depressor, under MCU controls,
Switch on or off the connection of high-tension line and the string wire coil in vibrating string type sensor；
First lightning protection device and the second lightning protection device transmission data, the second lightning protection device connection vibrating string type sensor；
Low pressure frescan under MCU controls, by DC low-voltage current signal with certain regular transmission to vibrating wire sensor
String wire coil, the output signal of low pressure frescan is switched between square wave and sine wave；
The high-pressure side of high-tension damper is connected with the first lightning protection device, high-voltage switch gear, low-pressure side and the sensing of high-tension damper
Device detection sampler, the first Temperature sampler, filtering follower, the connection of low pressure frescan；
First Temperature sampler is used to detect the temperature sensor in vibrating wire sensor that second temperature harvester to be used to detect
The temperature sensor of clock reference, gathers two temperature values, and the string wire natural frequency of vibration and clock reference temperature influence are carried out respectively
Frequency amendment；Second temperature harvester is installed on circuit board same position with clock reference circuit；
Filtering follower is connected with high-tension damper, filter amplifier；
Filter amplifier and MCU, filtering follower, cymoscope are connected, and filter amplifier is programmable amplifier, times magnification
Number returns primary signal quality and is arranged according to its register parameters by MCU according to sensor；
Signal amplitude detector is connected with the output of MCU, filter amplifier, the vibratory string signal amplitude after detection amplification；
Cymoscope is connected with the output of MCU, filter amplifier, and the sinusoidal signal after amplification is converted to into square-wave signal,
Giving MCU carries out signal period statistics；
Power supply, clock reference, data storage, RTC real-time clocks, controlled multichannel independent current source, digital interface, simulation connect
Mouth is connected respectively with MCU.
The present invention controls straightway pump depressor and shakes by string wire by MCU, controls high pressure sampler, low pressure by MCU and sweeps
Frequency device, sensor detection sampler, high-tension damper, the first Temperature sampler, second temperature harvester, filtering follower, filter
Twt amplifier, cymoscope come obtain after string wire shakes produce frequency values, therefore the vibrating string type sensor reading data dress
Put integrated level height, advanced technology, small volume, interface various, can easily be linked into existing informatization and network, realize from artificial survey
Try the fast transition of full-automatic unmanned test on duty, at the same also sensor can be carried out in measurement process validation checking,
Signal quality overall merit, substantially reduces artificial input and labor intensity, improves measurement efficiency, reduces vibrating wire sensor
Using difficulty.
Because filter amplifier is programmable amplifier, amplification is arranged by MCU according to its register parameters, by journey
The amplification of control signal amplifier, dynamically can carry out expecting that the voltage magnitude of multiple amplifies according to primary signal, be easy to
Signals collecting.Furthermore, according to the signal amplitude after real-time dynamic amplification, the amplification for collecting, can be with inverse sensor
Primary signal amplitude, so as to realize the quality evaluation (signal quality related to sensor output signal amplitude) of primary signal,
To adjust motivational techniques, driving voltage when signal amplitude is too strong or excessively weak (whether high pressure activation or low pressure are encouraged).
Either high pressure activation or low pressure are encouraged, and the amplitude of pumping signal is program control, and purpose is exactly in order to according to current sensor
The primary signal of output carrys out dynamic adjustment energisation mode, to reach the purpose of dynamically adapting different manufacturers, different model sensor.
So, a characteristic of the present invention is to adapt to different sensors to greatest extent by this structure, allows sensor output to believe
Number and the signal for calculating frequency for collection after amplifying be optimal state, improve certainty of measurement.
In addition, the pump pressure of the straightway pump depressor is pumped circuit by LC or alternating impulse transformator is realized.
In addition, the high pressure sampler is converted into low voltage signal and is converted into digital quantity by ADC using high-precision electric resistance partial pressure
MCU is passed to, or is converted into passing to MCU after digital quantity by ADC digital conversion chip.
In addition, the high-voltage switch gear is high-pressure MOS switching tube, or middle-size and small-size relay.
In addition, the lightning protection device is multiple autonomous channels, vibratory string pumping signal and return signal, temperature sensing are transmitted respectively
The bi-directional digital or analogue signal of device.
In addition, square wave is realized by MCU+ isolation circuits (such as optocoupler)+driving intensifier circuit；The DAC that sine wave passes through MCU
Function directly uses programmable functional generator, reuses driving intensifier circuit output；Intensifier circuit is driven to use three poles
Pipe, metal-oxide-semiconductor, operational amplifier are realizing；Low pressure frescan have it is independent all the way switched by MCU controls, switch respectively with filter
Twt amplifier and high-tension damper frequency sweep line channel connection, for when necessary by the homophase amplitude after filter and amplification just
Coil of the string ripple signal feedback transmission to vibrating wire sensor.
In addition, the high-tension damper is multichannel operation amplifier circuit, or inductance buffering+voltage clamp circuit,
Or with high-voltage signal as the metal-oxide-semiconductor circuit of shut-off thresholding.
In addition, the temperature sensor is critesistor or digital temperature sensor DS18B20.
In addition, the cymoscope is programmable schmidt trigger cymoscope.
Programmable schmidt trigger cymoscope, the comparator of Mobile state adjustment is entered to benchmark fiducial value automatically, shields amplitude
Too low signal does not carry out square wave output (such as power supply ripple, interference noise etc.), for intensity exceedes a certain amount of periodic signal
Square wave conversion output is carried out to MCU.Coordinate the peak detection function of magnitude detector, one section of moderate letter of preferable signal amplitude
Number it is acquired statistics.
Programmable window comparison detection device：Programmable restriction (schmidt trigger detection is carried out to signal amplitude bound
Device only shields small-signal, and the signal big to amplitude is not limited).The preferably moderate segment signal of signal amplitude carries out square wave conversion
Output.
Programmable microcontroller MCU, is connected with each device of the invention, under firmware program control, completes to coordinate flow process, shakes
The work such as chord sensor data acquisition, digital interface communication, analog interface input and output.Can compile for logics such as single-chip microcomputer, DSP
Journey device.
Memorizer is connected with MCU, is controlled by MCU, preserves work register data, historical sensor data, signal spectrum
Data etc..
RTC real-time clocks are connected with MCU, and real-time clock is powered using reserve battery.
Digital communication interface contains the digital interface of multiple standards, and UART, RS232, RS485, ISP, IIC, CAN lead to
Cross digital interface carries out both-way communication with host computer.
To meet Module-embedding to other measuring circuits, be easy to Integrated Development, the external digital interface of this module include UART,
RS232、RS485、SPI、IIC、CAN.UART, SPI, IIC, CAN interface are digital interfaces the most commonly used in electronic circuit, are led to
Crossing these interfaces can carry out data communication, control module work, reading measurement data with module.RS232, RS485 are standard meters
Calculation machine interface, can conveniently access computer system.Further, since this module carries device address, and device address can be by user
Configuration, therefore can realize that (UART, RS232 interface is not bus for the multimode integrated network of one master and multiple slaves with reference to digital bus interface
Interface, other are several to be entirely) application.
Using industrial general agreement MODBUS, industrial sidetrack test can be directly accessed.
Analog interface include some interfaces for input and output, output interface be used for export running status, warning message,
Sensor frequency value, sensor temperature values, signal quality, frequency spectrum data etc.；Input interface is used for DLT ADC, low-power consumption
Control, device address setting etc..The frequency values of analog representation, temperature value realize vibrating wire sensor to be believed by faint sinusoidal frequency
Number it is changed into regular industrial normal voltage, the function of current signal, vibrating wire sensor is directly accessed very ripe
In analog measurement system；DLT ADC interface, can be directly accessed the standard analog signal of live multiple sensors, turn
It is changed to standard digital interface and is transferred to host computer；Warning message output function can be used for live early warning, can the number of making via transmission line
It is transferred to host computer；Running status indicates that usable level signal shows the working condition of sensor states and module of the present invention.
The frequency values of analog representation：The sensor for measuring is converted into into Industrial Simulation signal, conveniently accessible existing mould
Analog quantity control system.Analog quantity after conversion can be voltage or current signal and represent the pulse letter of frequency values with dutycycle
Number, voltage signal is ± 5V, 0~2V, 0~5V, and current signal is 0~20mA, 4~20mA, and pulse signal is represented with high level
Frequency, the continued duration of high level represents frequency values.
In order to ensure analog signal accuracy, voltage and current signal uses doubleway output, increases analog quantity scope, ensures precision
(explanation：When representing 500~5000Hz with 0~5V, substantially 1mV represents 1Hz, 1mV for performance it is general adopt control equipment for
Cannot distinguish well, the present invention is exported using two paths of signals, all the way for representing thousand and hundred of frequency, another road is used
In a position and ten are represented, transmission and the precision for gathering is effectively ensured).
The independent current source group that the power supply group controlled by MCU can be opened or closed by MCU controls.Voltage amplitude can be adjusted by MCU
Value, using having overcurrent protection, the chip of short-circuit protection, certain power supply not interfered with when excessively stream or short circuit power supply chip occurs
MCU normally runs, and can be taken protective measure, be sent error message by MCU in time.
In addition to core MCU, each several part is independent current source and powers, and can be turned off when without measurement work, realizes saving
Electric energy, the function of low-power consumption.
As shown in Fig. 2 additionally providing the method for work of the data reading device of this vibrating string type sensor, the method includes
Following steps：
(1) electricity on；
(2) depositor of MCU is read；
(3) judge whether to detect vibrating string type sensor, be then execution step (3), otherwise execution step (8)；
(4) according to the method excitation vibrating string type sensor of regulation；
(5) signal of vibrating string type sensor is gathered；
(6) according to the algorithm signal calculated value of regulation；
(7) judge whether signal quality is qualified, be then execution step (8), otherwise execution step (3)；
(8) output information is refreshed.
The data reading device of the vibrating string type sensor has following features：
Using multiple technologies, multiple links, cooperate, different type, different manufacturers, different shaped are adapted to greatest extent
Number vibrating string type sensor；
Using multiple technologies means and method, arousal effect and frequency reading accuracy are improved, reading speed is improved, is extended biography
The sensor life-span；
Measurement data is exported using multiple interfaces, vibratory string excitation and reading process are coated, provide a user with standard
, wieldy digital interface signal and conventional simulation signal；
In addition to excitation read functions, also with sensor detection, line short protection, signal quality estimation function；
Flexible parameter configuration function；
Low power consumption characteristic；
Data storage function；
The general purpose transducer access interface of extension and agreement.
The above, is only presently preferred embodiments of the present invention, not makees any pro forma restriction to the present invention, it is every according to
According to any simple modification, equivalent variations and modification that the technical spirit of the present invention is made to above example, still belong to the present invention
The protection domain of technical scheme.
Claims (10)
1. a kind of data reading device of vibrating string type sensor, it is characterised in that：It include straightway pump depressor, high pressure sampler,
High-voltage switch gear, the first lightning protection device, low pressure frescan, sensor detection sampler, high-tension damper, the first Temperature sampler, the
Two Temperature samplers, filtering follower, filter amplifier, cymoscope, central processor MCU, power supply, clock reference, data are deposited
Reservoir, RTC real-time clocks, controlled multichannel independent current source, digital interface, analog interface；
Straightway pump depressor is connected with MCU, high-voltage acquisition device, high-voltage switch gear, realizes that low-voltage turns to high voltage under MCU controls
Change, the high voltage of its output is used to send high-voltage pulse pumping signal to vibrating string type sensor；
High pressure sampler to MCU provides voltage signal；
High-voltage switch gear is connected with the High voltage output circuit of MCU and straightway pump depressor, under MCU controls, switches on or off high-voltage line
The connection of the string wire coil in road and vibrating string type sensor；
First lightning protection device and the second lightning protection device transmission data, the second lightning protection device connection vibrating string type sensor；
Low pressure frescan under MCU controls, by DC low-voltage current signal with certain regular transmission to vibrating wire sensor string wire
Coil, the output signal of low pressure frescan is switched between square wave and sine wave；
The high-pressure side of high-tension damper is connected with the first lightning protection device, high-voltage switch gear, and low-pressure side and the sensor of high-tension damper are examined
Survey sampler, the first Temperature sampler, filtering follower, the connection of low pressure frescan；
First Temperature sampler is used to detect the temperature sensor in vibrating wire sensor that second temperature harvester to be used to detect clock
The temperature sensor of benchmark, gathers two temperature values, and the frequency of the string wire natural frequency of vibration and clock reference temperature influence is carried out respectively
Rate amendment；Second temperature harvester is installed on circuit board same position with clock reference circuit；
Filtering follower is connected with high-tension damper, filter amplifier；
Filter amplifier and MCU, filtering follower, cymoscope are connected, and filter amplifier is programmable amplifier, amplification according to
Primary signal quality is returned according to sensor to be arranged according to its register parameters by MCU；
Signal amplitude detector is connected with the output of MCU, filter amplifier, the vibratory string signal amplitude after detection amplification；
Cymoscope is connected with the output of MCU, filter amplifier, and the sinusoidal signal after amplification is converted to into square-wave signal, gives
MCU carries out signal period statistics；
Power supply, clock reference, data storage, RTC real-time clocks, controlled multichannel independent current source, digital interface, analog interface point
It is not connected with MCU.
2. the data reading device of vibrating string type sensor according to claim 1, it is characterised in that：The straightway pump depressor
Pump pressure circuit or alternating impulse transformator be pumped by LC realize.
3. the data reading device of vibrating string type sensor according to claim 2, it is characterised in that：The high pressure sampler
Low voltage signal is converted into using high-precision electric resistance partial pressure and digital transfer is converted into MCU by ADC, or turned by ADC digital
Change chip to be converted into passing to MCU after digital quantity.
4. the data reading device of vibrating string type sensor according to claim 3, it is characterised in that：The high-voltage switch gear is
High-pressure MOS switching tube, or middle-size and small-size relay.
5. the data reading device of vibrating string type sensor according to claim 4, it is characterised in that：The lightning protection device is many
Individual autonomous channel, transmits respectively vibratory string pumping signal and return signal, the bi-directional digital of temperature sensor or analogue signal.
6. the data reading device of vibrating string type sensor according to claim 5, it is characterised in that：Square wave by MCU+ every
Realize from circuit+driving intensifier circuit；Sine wave passes through the DAC functions of MCU or directly uses programmable functional generator, then
Exported using intensifier circuit is driven；Intensifier circuit is driven to realize using audion, metal-oxide-semiconductor, operational amplifier；Low pressure frescan
Have it is independent all the way switched by MCU controls, switch connects respectively with the frequency sweep line channel of filter amplifier and high-tension damper
Connect, for when necessary by the homophase amplitude sine wave signal feedback transmission after filter and amplification to vibrating wire sensor coil.
7. the data reading device of vibrating string type sensor according to claim 6, it is characterised in that：The high-tension damper
It is multichannel operation amplifier circuit, or inductance buffering+voltage clamp circuit, or with high-voltage signal to turn off thresholding
Metal-oxide-semiconductor circuit.
8. the data reading device of vibrating string type sensor according to claim 7, it is characterised in that：The temperature sensor
For critesistor or digital temperature sensor DS18B20.
9. the data reading device of vibrating string type sensor according to claim 8, it is characterised in that：The cymoscope is can
Programming schmidt trigger cymoscope.
10. the method for work of the data reading device of vibrating string type sensor according to claim 1, it is characterised in that：Should
Method is comprised the following steps：
(1) electricity on；
(2) depositor of MCU is read；
(3) judge whether to detect vibrating string type sensor, be then execution step (3), otherwise execution step (8)；
(4) according to the method excitation vibrating string type sensor of regulation；
(5) signal of vibrating string type sensor is gathered；
(6) according to the algorithm signal calculated value of regulation；
(7) judge whether signal quality is qualified, be then execution step (8), otherwise execution step (3)；
(8) output information is refreshed.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966223A (en) * | 2017-11-15 | 2018-04-27 | 东南大学 | A kind of vibrating wire sensor exciting optimization method and vibratory string harvester |
| CN107990919A (en) * | 2017-12-14 | 2018-05-04 | 上海岩联工程技术有限公司 | The self-adapting data acquisition method and device of a kind of vibrating wire sensor |
| CN110057473A (en) * | 2019-04-30 | 2019-07-26 | 南京信息职业技术学院 | A kind of excitation chain and its measuring circuit of unicoil vibrating wire sensor |
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| CN110108315B (en) * | 2019-06-11 | 2024-02-20 | 杨毅 | Vibrating wire sensor calibration parameter storage core-spun yarn embedded structure |
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| CN116879855A (en) * | 2023-09-05 | 2023-10-13 | 成都梓峡信息技术有限公司 | Radar electronic countermeasure signal processing system and method |
| CN116879855B (en) * | 2023-09-05 | 2023-11-28 | 成都梓峡信息技术有限公司 | Radar electronic countermeasure signal processing system and method |
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Address after: Building D33, Science and Technology Research and Development Center, Hebei Yanjiao Military civilian Integration Technology Incubation Center Phase I, No. 515, Fucheng Road, Yanjiao High tech Zone, Sanhe, Langfang, Hebei 065201 Patentee after: Hebei Stability Control Technology Co.,Ltd. Address before: 065201 room a1202, Chuangye building, northeast corner of Shenwei Huandao, east of Yingbin Road North Road, Yanjiao Development Zone, Langfang City, Hebei Province Patentee before: HEBEI STABILITY CONTROL TECHNOLOGY Co.,Ltd. |