CN106199397A - A kind of load ratio bridging switch mechanical breakdown on-line monitoring method - Google Patents
A kind of load ratio bridging switch mechanical breakdown on-line monitoring method Download PDFInfo
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Abstract
The invention discloses a kind of load ratio bridging switch mechanical breakdown on-line monitoring method, gather the vibration signal of load ratio bridging switch, gather the current data of motor, gather rotating shaft rotating speed；The vibration signal gathered, motor current signal, rotating shaft tach signal are carried out comprehensive descision and draw fault diagnosis result and send data to fiber optic network；Connect fiber optic network data and send vibration data, current data and rotary speed data and fault diagnosis result store, analyze in real time, curve shows, be found to have in time on-load shunting switch be in operation the machine driving position bite that occurs, switching contact bite, dislocation loosen, the asynchronous mechanical breakdown of three-phase, it is achieved the on-line monitoring of quantity of state and diagnosis in load ratio bridging switch handoff procedure.Data of the present invention process efficiently, and intelligence degree is high, can realize network management；Processing technology is simple, production cost is low, be easy to promote the use of.
Description
Technical field
The invention belongs to mechanical Fault Monitoring of HV technical field, particularly relate to a kind of load ratio bridging switch machinery event
Barrier on-line monitoring method.
Background technology
Mechanical breakdown, it is simply that refer to mechanical system (part, assembly, parts or whole equipment or even a series of
Equipment combination) deviateed its equipment state and lost the phenomenon of part or all of function.
Such as some part or parts damages, ability to work is caused to be lost；Engine power reduces；Power train
System disequilibrium and noise increase；The ability to work of operating mechanism declines；The consumption of fuel and lubricating oil increases
Add, when it is beyond set quota, belong to mechanical breakdown.
Mainly mutually close between its damage parts and part in the bug list of machinery now its structure
The destruction of.Fracture, deformation, the gap increase of counterpart or interference such as part can be lost, fixing
With the loosening of clamp device and inefficacy etc..
Diagnostic techniques develops in decades, creates huge economic benefit, becomes the focus of various countries' research.
From the point of view of each branch technique of diagnostic techniques, the U.S. occupies leading position.Some companies of the U.S., as
Bently, HP etc., their monitoring product substantially represent the top level of current diagnostic techniques, no
Only there is perfect monitoring function, and there is stronger diagnostic function, in universe, military affairs, chemical industry etc.
Aspect has a wide range of applications.Three set artificial intelligence diagnosis's software (steam turbines of US Westinghouse company
TurbinAID, electromotor GenAID, water chemistry ChemAID) safe operation of its produced unit is played
Huge effect.Also have General Electric Apparatus Co.(U.S.A.) research for internal combustion electric locomotive failture evacuation
Specialist system DELTA；The specialist system for dynamical system diagnosis that U.S. NASA develops；Delio
The specialist system for car engine cooling system noise cause diagnosis that Products company develops
ENGING COOLING ADCISOR etc..In recent years, due to developing rapidly of microcomputer particularly portable machine,
Online, off-line monitoring based on portable machine becomes increasingly popular with diagnostic system, such as M6000 system produced in USA
Row product, is widely used.
Load ratio bridging switch is the assembly of power transformer most critical, undertakes Voltage Cortrol in power system
Function.Whether quality, work the most reliably, are directly connected to transformator for its sequence of movement and handoff procedure
Safe operation.Put into operation in a large number along with ULTC and load ratio bridging switch frequent movement adjust,
The mechanical breakdown that load ratio bridging switch occurs in running gradually comes out, and once breaks down to transformation
The safe and stable operation of device and electrical network causes and has a strong impact on.Adding up according to foreign data, shunting switch fault accounts for
The 41% of ULTC fault, domestic average statistics data show, the fault of shunting switch accounts for change
More than the 20% of depressor fault.Load ratio bridging switch is in operation it may happen that machine driving position bite,
The mechanical breakdowns such as switching contact bite, dislocation loosens, three-phase is asynchronous, there is presently no on-line testing and
Diagnose the device of these faults.
Summary of the invention
It is an object of the invention to provide a kind of load ratio bridging switch mechanical breakdown on-line monitoring method, it is intended to
The operation solving the existence of existing mechanical failure diagnostic method is complicated, inefficiency, interval between diagnosis length
Problem.
The present invention is achieved in that a kind of this load ratio bridging switch mechanical breakdown of load ratio bridging switch machine exists
Line monitoring method comprises the following steps:
Gather the vibration signal of load ratio bridging switch, gather the current data of motor, gather rotating shaft rotating speed；
The vibration signal gathered, motor current signal, rotating shaft tach signal carry out comprehensive descision to be out of order and examine
Disconnected result also sends data to fiber optic network；
Connect fiber optic network data and send vibration data, current data and rotary speed data and fault diagnosis result
Storing, analyze in real time, curve shows, be found to have in time on-load shunting switch be in operation occur machine
Tool transmission portion bite, switching contact bite, dislocation loosen, the asynchronous mechanical breakdown of three-phase, it is achieved have
The on-line monitoring of quantity of state and diagnosis in on-load shunting switch handoff procedure；
The acquiring and processing method of vibration signal uses vibration signals collecting processing module, comprises the following steps:
Vibration signal is input to sensor interface circuitry and is converted to voltage signal by vibrating sensor, and voltage is believed
High pass filter number in sensor interface circuitry, filters the DC component in signal, and output is to can
Programming amplifier, programmable amplifier receives the order of FPGA, the amplification of regulation signal, it is ensured that
Being in suitable voltage range by the number of accepting and believing, the signal after amplification exports Anti-aliasing Filter Circuits, anti-mixed
Integrated Continuous Time Filter in folded filter circuit filters the high-frequency interferencing signal in signal, and output is arrived
A/D change-over circuit, A/D change-over circuit carries out 16 bit synchronization collections to the signal of input, and FPGA produces
A/D change-over circuit controls sequential, reads the data of A/D change-over circuit generation and places the data in FPGA
In internal RAM, DSP reads sampled data from the RAM within FPGA, extracts vibration signal
Data are carried out FFT process by eigenvalue, result are left in the RAM within FPGA.
Further, multiple signals are processed by the acquiring and processing method of signal simultaneously, and every road signal all sets
It is equipped with independent programmable amplifier.
Further, the monitoring device of this load ratio bridging switch mechanical breakdown on-line monitoring method includes: by work
Control machine, DRS, sensor, signal conditioning circuit, display, keyboard form；
Industrial computer is by the vibration signal modulate circuit of A/D analog-digital converter with vibration signals collecting unit
Being connected, vibration signal modulate circuit connects vibrating sensor, gathers vibration signal；Industrial computer passes through A/D
Analog-digital converter is connected with the current signal conditioning circuit of motor current signal unit, current signal conditioning electricity
Road connects current sensor, gathers motor current signal；Industrial computer is by A/D analog-digital converter and turns
The tach signal modulate circuit of axle rotating speed collecting unit is connected, and tach signal modulate circuit connects has rotating speed to pass
Sensor, gathers rotating shaft tach signal；Industrial computer is connected with DRS by network interface card, and industrial computer passes through
I/O input/output interface is connected with load ratio bridging switch auxiliary contact with relay, adopts for control signal
Collection, industrial computer connects display and keyboard；
Further, display uses LCD display, and keyboard uses matrix keyboard.
Further, industrial computer is connected with power module, obtains working power.
Further, the acquiring and processing method of vibration signal uses vibration signals collecting processing module, this module
Including the sensor interface circuitry being sequentially connected with, programmable amplifier, frequency overlapped-resistable filter, A/D conversion
Circuit and FPGA, described FPGA controls programmable amplifier and A/D change-over circuit, and FPGA is also connected with
Having self-checking circuit, provide the reference voltage of test for it, detect for BIT, DSP reads from FPGA
Take sampled data, extract the eigenvalue of vibration signal, data are processed and analyzes, by analysis result
Leave in the RAM within FPGA and read for master control borad.
Further, sensor interface circuitry provides matched interfaces for vibrating sensor, uses constant-current source two pole
Pipe CR220 forms constant current source driving circuit, and+24VDC powers, and CR220 output rated current is 2.2mA,
Protection diode V1 and V2, IOUT+ and IOUT-it is provided with for sensing between+24VDC and earth polar
Device drive input and signal export multiplexing end, vibrating sensor output voltage signal through capacitance C1,
Filtering the DC component in signal, resistance R2 and electric capacity C1 and constitute RC high-pass filtering circuit, RC is high
Bandpass filter circuit is connected with the in-phase input end of LM124 voltage follower, and LM124 voltage follower connects
To the normal-closed end of single-pole double-throw switch (SPDT), export the in-phase input end of programmable amplifier through self-checking circuit.
The load ratio bridging switch mechanical breakdown on-line monitoring method that the present invention provides, can accurately judge there is load point
Connect switch machine characteristic, be found to have in time on-load shunting switch be in operation occur machine driving position bite,
The mechanical breakdowns such as switching contact bite, dislocation loosen, three-phase is asynchronous, it is achieved load ratio bridging switch switches
During the on-line monitoring of quantity of state and diagnosis；Data process efficiently, and intelligence degree is high, can realize net
Networkization manages；Processing technology is simple, production cost is low, be easy to promote the use of.
Accompanying drawing explanation
Fig. 1 is the load ratio bridging switch mechanical breakdown on-line monitoring method flow process that the embodiment of the present invention provides
Figure；
Fig. 2 is to monitor in the load ratio bridging switch mechanical breakdown on-line monitoring method that the embodiment of the present invention provides
The structural representation of device；
Fig. 3 is to monitor in the load ratio bridging switch mechanical breakdown on-line monitoring method that the embodiment of the present invention provides
The overall structure schematic diagram of device；
In figure: 1, industrial computer；2, vibration signals collecting unit；3, motor current signal unit；4、
Rotating shaft rotating speed collecting unit；5, DRS；
Fig. 4 is the vibration signals collecting processing module theory diagram that the embodiment of the present invention provides；
Fig. 5 is the vibrating sensor interface circuit schematic diagram that the embodiment of the present invention provides；
Fig. 6 is the programmable amplifier schematic diagram that the embodiment of the present invention provides；
Fig. 7 is the frequency overlapped-resistable filter schematic diagram that the embodiment of the present invention provides；
Fig. 8 is the A/D change-over circuit schematic diagram that the embodiment of the present invention provides；
Fig. 9 is the parallel interface A/D conversion timing sequence figure that the embodiment of the present invention provides；
Figure 10 is the self-checking circuit schematic diagram that the embodiment of the present invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment,
The present invention is further elaborated.Should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
Below in conjunction with the accompanying drawings and the application principle of the present invention is further described by specific embodiment.
As it is shown in figure 1, the load ratio bridging switch mechanical breakdown on-line monitoring method of the embodiment of the present invention includes
Following steps:
S101: vibration signals collecting unit gathers the vibration signal of load ratio bridging switch, motor current signal
Unit gathers the current data of motor, and rotating shaft rotating speed collecting unit gathers rotating shaft rotating speed；Industrial computer is to collection
Vibration signal, motor current signal, rotating shaft tach signal carry out comprehensive descision and draw fault diagnosis result
And send data to fiber optic network；
S102: connect fiber optic network DRS vibration data that industrial computer is sent, current data with
Rotary speed data and fault diagnosis result store, and analyze in real time, and curve shows, are found to have load in time
Shunting switch be in operation occur machine driving position bite, switching contact bite, dislocation loosen, three
The mechanical breakdown such as mutually asynchronous, it is achieved in load ratio bridging switch handoff procedure the on-line monitoring of quantity of state with examine
Disconnected.
As shown in Figures 2 and 3, the monitoring device of the embodiment of the present invention specifically includes that by industrial computer, number
Forming according to receiving station, sensor, signal conditioning circuit, display, keyboard etc., industrial computer (1) passes through
A/D analog-digital converter is connected with the vibration signal modulate circuit of vibration signals collecting unit (2), vibration letter
Number modulate circuit connects vibrating sensor, gathers vibration signal.Industrial computer (1) is turned by A/D modulus
Parallel operation also can be connected with the current signal conditioning circuit of motor current signal unit (3), and current signal is nursed one's health
Circuit connects current sensor, gathers motor current signal.Industrial computer (1) passes through A/D analog digital conversion
Device also can be connected with the tach signal modulate circuit of rotating shaft rotating speed collecting unit (4), tach signal conditioning electricity
Road connects speed probe, gathers rotating shaft tach signal.Industrial computer (1) passes through network interface card and data receiver
Stand (5) be connected, industrial computer (1) by I/O input/output interface and relay auxiliary with load ratio bridging switch
Adjuvant grafting point is connected, and for control signal collection, industrial computer (1) connects display and keyboard, display
Can be LCD display, keyboard can be matrix keyboard.Industrial computer (1) is also connected with power module,
Obtain working power.
As shown in Figure 4, vibration signals collecting acquisition processing module specifically includes that vibrating sensor interface electricity
Road, programmable amplifier, frequency overlapped-resistable filter, A/D change electrical equipment, self-checking circuit, FPGA, DSP etc.
Circuit forms.
Sensor interface circuitry provides matched interfaces for vibrating sensor, and vibration signal is converted to voltage letter
Number, output signal, through high pass filter, filters the DC component in signal.Vibrating sensor interface electricity
Road is as it is shown in figure 5, use Constant Current Source Diode CR220 design constant current source driving circuit, and+24VDC supplies
Electricity, CR220 output rated current is 2.2mA.In figure, V1 and V2 is protection diode.IOUT+ and
IOUT-is that sensor drives input and signal to export multiplexing end, and the sensitivity of vibrating sensor is
100mV/g, output signal is ± 5V signal, and its DC offset voltage is+12V.Vibrating sensor exports
Voltage signal, through capacitance C1, filters the DC component in signal, resistance R2 and electric capacity C1 structure
Becoming RC high-pass filtering circuit, the capacitance of C1 is that the resistance of 22uF, R2 takes 3.6k Ω, obtains high pass filter
The cut-off frequency of ripple device is 2.01Hz, and high pass filter eliminates the frequency signal component less than 2.01Hz,
Avoid setting and the signal Spectrum Analysis of the whole gain of effect of signals of these frequencies.Through high-pass filtering
The vibration signal of device filtering exports the in-phase input end of LM124 voltage follower, and LM124 has 1MHz
Bandwidth, voltage follower is connected to the normal-closed end of single-pole double-throw switch (SPDT), exports can compile through self-checking circuit
The in-phase input end of journey amplifier.
Programmable amplifier receives the order of FPGA, the amplification of regulation signal, every road vibration signal
It is both provided with independent programmable amplifier.As shown in Figure 6, REF pin sets the biasing of output signal
Voltage, herein ground connection, bias voltage is 0.FPGA arranges amplification able to programme by data wire A0, A1
The gain coefficient of device, at the trailing edge of/WR, writes the gain of corresponding programmable amplifier by gain coefficient
In latch.
Anti-aliasing Filter Circuits uses integrated Continuous Time Filter, filters the high-frequency interferencing signal in signal,
Prevent the vibration signal gathered from producing aliasing.Frequency overlapped-resistable filter selects the MAX274 of MAXIM company, should
Chip is integrated Continuous Time Filter, is made up of 4 second order filters.Can power by+5V or ± 5V.
Owing to not having clock signal inside MAX274, the wave filter of design does not has a clocking noise, thus this filtering
Device is applicable to vibration analysis.Use the external electricity of MAX274 computed in software MAX274 that MAXIM company provides
The resistance of resistance.The exponent number of wave filter, sample frequency and cut-off frequency are set in software, it is possible to obtain
The frequency response chart of wave filter and the resistance of outer meeting resistance.The internal schematic diagram such as Fig. 7 of MAX274 median filter
Shown in.R1, R2, R3, R4 are four outer meeting resistances, and IN is signal input part, and LPO is low pass filtered
Ripple device output pin, BPO is band filter output pin.During FC pin ground connection, RY/RX=5: 1.
When designing wave filter, it should be understood that the effective frequency range of vibrating sensor output signal.According to vibration letter
Number anti-aliasing filter requirement, arranges exponent number and the cut-off frequency of wave filter.
A/D change-over circuit carries out 16 bit synchronization collections to the Multi-channel Vibration Signals of input, and (at least 6 tunnels are same
Step), in engineer applied, sample frequency typically uses 3～5 times of the highest effective frequency of signal.?
In vibration signals collecting processing module described herein, vibration signals collecting frequency is that 96kHz, A/D turn
Change chip and select the AD7656 of AD company, this chip comprise separate 16,6 tunnels, at a high speed,
Low-power consumption, successive approximation A/D converter, the high sampling rate of chip is up to 250kHz.
Supply voltage ± 5V～± 15V.Can in the way of parallel and serial with external circuits interface, defeated
Go out signal compatibility 3.3V or 5V level, thus this chip is easy to and microprocessor or dsp interface.
As shown in Figure 8, each CONVST signal controls two-way A/D converter and enters simultaneously AD7656 peripheral circuit
Row conversion.The reference voltage of AD7656 is accessed by outside, and reference voltage level is+2.5V.Vdrive pin
For logic output levels, Vdrive meets 3.3V herein, i.e. A/D converter and other chip interface level
For 3.3V.H/S SEL pin arranges the mode of operation of AD7576, when H/S SEL pin ground connection,
A/D conversion is triggered, when H/S SEL pin meets 3.3V, by chip internal by CONVST pin
Control depositor and trigger A/D conversion.H/S SEL pin connects low level herein.RANGE is input signal
Voltage range arranges pin, and when meeting+3.3V, input reference signal is ± 2*Vref.During ground connection, input
Range of signal is ± 4*Vref.RANGE pin meets 3.3V herein, and input reference signal is ± 5V.W/B connects
Low level, A/D converter parallel data bus line DB [0:15] transmission data.Generated A/D by FPGA to turn
Change control sequential, and read transformation result and leave in FPGA internal RAM.A/D conversion timing sequence figure is such as
Shown in Fig. 9.Whole sampling process, is triggered by synchronizing signal according to system requirements United Dispatching by FPGA
A/D changes, and when FPGA detects that synchronizing signal arrives, sends to A/D conversion chip respective channel
CONVST signal, gathers the fixing vibration signal counted.It is internally generated dual port RAM as number at FPGA
According to caching, DSP reads sampled data from dual port RAM.
Self-checking circuit provides the reference voltage of test for vibration signals collecting processing module, examines for BIT
Survey.The self-checking circuit principle schematic of vibration signal is as shown in Figure 10.SPDT is controlled by IN1 and IN2
The state of switch, select respectively output signal be+2.5V, 0V () or VB (vibration signal), reality
The Autonomous test of existing circuit and vibration measurement.By locality level signal, can be to the zero point of system
Verify.The MAX333 of MAXIM company selected by single-pole double-throw switch (SPDT), and it is double that this chip comprises four hilted broadswords
Throwing analog switch, supply voltage is ± 4.5V～± 20V, connects ± 5V power supply, logic input compatibility herein
CMOS/TTL level.
FPGA produces A/D conversion and control sequential, reads the data of A/D conversion generation and data is deposited
In the RAM within FPGA.Programmable amplifier is controlled by FPGA, it is ensured that be in by the number of accepting and believing
Suitably voltage range, thus improve sampling precision.
DSP reads sampled data from FPGA, and data are carried out pretreatment, by carrying out data soon
Speed Fourier transformation extracts the eigenvalue of vibration signal, utilizes fault diagnosis model algorithm to be analyzed, will
Analysis result leaves in the RAM within FPGA and reads for master control borad.
A/D conversion is controlled by the present invention by FPGA, compares CPU and controls A/D conversion regime,
Improve sample frequency and real-time；By using anti-aliasing filter technology, wave filter can be set flexibly
Exponent number and cut-off frequency, improve the stopband descending slope of wave filter, enhance signal capacity of resisting disturbance；
Extracted the eigenvalue of vibration signal by DSP, analyze in real time, reduce the data volume of generation, subtract
The light pressure to rear end recording equipment, improves the ageing of Breakdown Maintenance；When event occur in rotatable parts
During barrier, change by investigating the frequency content of vibration signal, amplitude and phase place, i.e. the frequency spectrum of vibration signal
Middle there is abnormal component, carries out breakdown judge and location according to the eigenvalue comparison of abnormal component.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any amendment, equivalent and the improvement etc. made within the spirit of invention and principle, should be included in this
Within the protection domain of invention.
Claims (7)
1. a load ratio bridging switch mechanical breakdown on-line monitoring method, it is characterised in that this load ratio bridging switch mechanical breakdown on-line monitoring method comprises the following steps:
Gather the vibration signal of load ratio bridging switch, gather the current data of motor, gather rotating shaft rotating speed；The vibration signal gathered, motor current signal, rotating shaft tach signal are carried out comprehensive descision and draw fault diagnosis result and send data to fiber optic network；
Connect fiber optic network data and send vibration data, current data and rotary speed data and fault diagnosis result store, analyze in real time, curve shows, be found to have in time on-load shunting switch be in operation the machine driving position bite that occurs, switching contact bite, dislocation loosen, the asynchronous mechanical breakdown of three-phase, it is achieved the on-line monitoring of quantity of state and diagnosis in load ratio bridging switch handoff procedure；
The acquiring and processing method of vibration signal uses vibration signals collecting processing module, comprises the following steps:
nullVibration signal is input to sensor interface circuitry and is converted to voltage signal by vibrating sensor，Voltage signal high pass filter in sensor interface circuitry，Filter the DC component in signal，Output is to programmable amplifier，Programmable amplifier receives the order of FPGA，The amplification of regulation signal，Guarantee to be in suitable voltage range by the number of accepting and believing，Signal after amplification exports Anti-aliasing Filter Circuits，Integrated Continuous Time Filter in Anti-aliasing Filter Circuits filters the high-frequency interferencing signal in signal，Output is to A/D change-over circuit，A/D change-over circuit carries out 16 bit synchronization collections to the signal of input，FPGA produces A/D change-over circuit and controls sequential，Read the data of A/D change-over circuit generation and place the data in the RAM within FPGA，DSP reads sampled data from the RAM within FPGA，Extract the eigenvalue of vibration signal，Data are carried out FFT process，Result is left in the RAM within FPGA.
2. load ratio bridging switch mechanical breakdown on-line monitoring method as claimed in claim 1, it is characterised in that multiple signals are processed by the acquiring and processing method of signal simultaneously, and every road signal is both provided with independent programmable amplifier.
3. load ratio bridging switch mechanical breakdown on-line monitoring method as claimed in claim 1, it is characterized in that, the monitoring device of this load ratio bridging switch mechanical breakdown on-line monitoring method includes: be made up of industrial computer, DRS, sensor, signal conditioning circuit, display, keyboard；
Industrial computer is connected with the vibration signal modulate circuit of vibration signals collecting unit by A/D analog-digital converter, and vibration signal modulate circuit connects vibrating sensor, gathers vibration signal；Industrial computer is connected with the current signal conditioning circuit of motor current signal unit by A/D analog-digital converter, and current signal conditioning circuit connects current sensor, gathers motor current signal；Industrial computer is connected with the tach signal modulate circuit of rotating shaft rotating speed collecting unit by A/D analog-digital converter, and tach signal modulate circuit connects speed probe, gathers rotating shaft tach signal；Industrial computer is connected with DRS by network interface card, and industrial computer is connected with load ratio bridging switch auxiliary contact with relay by I/O input/output interface, and for control signal collection, industrial computer connects display and keyboard.
4. load ratio bridging switch mechanical breakdown on-line monitoring method as claimed in claim 3, it is characterised in that display uses LCD display, and keyboard uses matrix keyboard.
5. load ratio bridging switch mechanical breakdown on-line monitoring method as claimed in claim 3, it is characterised in that industrial computer is connected with power module, obtains working power.
6. load ratio bridging switch mechanical breakdown on-line monitoring method as claimed in claim 1, it is characterized in that, the acquiring and processing method of vibration signal uses vibration signals collecting processing module, this module includes the sensor interface circuitry being sequentially connected with, programmable amplifier, frequency overlapped-resistable filter, A/D change-over circuit and FPGA, described FPGA controls programmable amplifier and A/D change-over circuit, FPGA is also associated with self-checking circuit, the reference voltage of test is provided for it, detect for BIT, DSP reads sampled data from FPGA, extract the eigenvalue of vibration signal, data are processed and analyzes, analysis result is left in the RAM within FPGA and read for master control borad.
null7. load ratio bridging switch mechanical breakdown on-line monitoring method as claimed in claim 6，It is characterized in that，Sensor interface circuitry provides matched interfaces for vibrating sensor，Constant Current Source Diode CR220 is used to form constant current source driving circuit，+ 24VDC powers，CR220 output rated current is 2.2mA，Protection diode V1 and V2 it is provided with between+24VDC and earth polar，IOUT+ and IOUT-is that sensor drives input and signal to export multiplexing end，Vibrating sensor output voltage signal is through capacitance C1，Filter the DC component in signal，Resistance R2 and electric capacity C1 constitutes RC high-pass filtering circuit，RC high-pass filtering circuit is connected with the in-phase input end of LM124 voltage follower，LM124 voltage follower is connected to the normal-closed end of single-pole double-throw switch (SPDT)，The in-phase input end of programmable amplifier is exported through self-checking circuit.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106704080A (en) * | 2017-01-04 | 2017-05-24 | 北京中元瑞讯科技有限公司 | Hydroelectric generating set thrust block looseness fault diagnosis method based on online data |
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| CN107478985A (en) * | 2017-08-21 | 2017-12-15 | 河海大学常州校区 | On-load tap changers of transformers state on_line monitoring device and its monitoring method |
| CN107907320A (en) * | 2017-12-01 | 2018-04-13 | 国网重庆市电力公司电力科学研究院 | The diagnostic method and device of the machine performance feature of on-load tap changers of transformers |
| CN107966207A (en) * | 2017-12-30 | 2018-04-27 | 广州供电局有限公司 | Load ratio bridging switch vibration signal acquisition device and analysis system |
| CN109061459A (en) * | 2018-08-30 | 2018-12-21 | 国网北京市电力公司 | The fault determination method and device of on-load voltage regulating switch, storage medium, processor |
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| CN110595762A (en) * | 2019-10-29 | 2019-12-20 | 广州供电局有限公司 | Transformer on-load tap changer diagnosis system and transformer on-load tap changer diagnosis method |
| CN110703086A (en) * | 2019-11-12 | 2020-01-17 | 国网河南省电力公司南阳供电公司 | Transformer working condition information acquisition system and computer readable medium storing fault detection program |
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| CN106704080A (en) * | 2017-01-04 | 2017-05-24 | 北京中元瑞讯科技有限公司 | Hydroelectric generating set thrust block looseness fault diagnosis method based on online data |
| CN107390118A (en) * | 2017-06-13 | 2017-11-24 | 西安交通大学 | A kind of A.C. contactor on-line monitoring system and its on-line monitoring method |
| CN107478985A (en) * | 2017-08-21 | 2017-12-15 | 河海大学常州校区 | On-load tap changers of transformers state on_line monitoring device and its monitoring method |
| CN107907320B (en) * | 2017-12-01 | 2020-04-10 | 国网重庆市电力公司电力科学研究院 | Method and device for diagnosing mechanical state characteristics of on-load tap-changer of transformer |
| CN107907320A (en) * | 2017-12-01 | 2018-04-13 | 国网重庆市电力公司电力科学研究院 | The diagnostic method and device of the machine performance feature of on-load tap changers of transformers |
| CN107966207A (en) * | 2017-12-30 | 2018-04-27 | 广州供电局有限公司 | Load ratio bridging switch vibration signal acquisition device and analysis system |
| CN109061459A (en) * | 2018-08-30 | 2018-12-21 | 国网北京市电力公司 | The fault determination method and device of on-load voltage regulating switch, storage medium, processor |
| CN109443717A (en) * | 2018-10-16 | 2019-03-08 | 国网江苏省电力有限公司南京供电分公司 | A kind of load ratio bridging switch mechanical breakdown on-line monitoring method |
| CN111638304A (en) * | 2019-03-01 | 2020-09-08 | 沈阳工业大学 | High-speed collection and storage device for multipath signals |
| CN110595762A (en) * | 2019-10-29 | 2019-12-20 | 广州供电局有限公司 | Transformer on-load tap changer diagnosis system and transformer on-load tap changer diagnosis method |
| CN110703086A (en) * | 2019-11-12 | 2020-01-17 | 国网河南省电力公司南阳供电公司 | Transformer working condition information acquisition system and computer readable medium storing fault detection program |
| CN111238632A (en) * | 2020-01-15 | 2020-06-05 | 西安交通大学 | High-precision vibration signal acquisition and processing system |
| CN117666427A (en) * | 2023-12-01 | 2024-03-08 | 利维智能（深圳）有限公司 | State monitoring and fault diagnosis device for mechanical equipment |
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