CN204064443U - Based on the transformer fault prior-warning device of vibration transducer - Google Patents
Based on the transformer fault prior-warning device of vibration transducer Download PDFInfo
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- CN204064443U CN204064443U CN201420089397.1U CN201420089397U CN204064443U CN 204064443 U CN204064443 U CN 204064443U CN 201420089397 U CN201420089397 U CN 201420089397U CN 204064443 U CN204064443 U CN 204064443U
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Abstract
Based on the transformer fault prior-warning device of vibration transducer, comprise installation multiple vibration transducers, power transfer module on the transformer, described vibration transducer connection signal amplifying circuit, signal amplification circuit connecting band bandpass filter circuit, bandwidth-limited circuit connects comparer, one-chip computer module respectively, and one-chip computer module connects comparer, sound and light alarm module and LCD MODULE.The utility model is based on the transformer fault prior-warning device of vibration transducer, multiple vibration transducer is adopted to form sensor array, the vibration that sensor transformer shell produces, by analyzing all kinds of waveforms detected, judge whether transformer breaks down, and determine what fault type is further.Thus reach and give warning in advance, safeguard in advance, extend transformer serviceable life, the generation of Accident prevention.
Description
Technical field
A kind of transformer fault prior-warning device based on vibration transducer of the utility model, detects for transformer fault.
Background technology
In each equipment of electric system, the value of transformer is both very expensive, acts on also very important.Transformer safety work, is directly connected to the safe operation of electrical network.In order to ensure that transformer safety is run, extend the time between overhauls(TBO) as far as possible, the method for research prediction inside transformer Hidden fault is necessary.Inside transformer Hidden fault often can with the generation of vibration, and primary oscillation source is conductive impurity (as metal fillings, metal wire and burr etc.), and these impurity floatingly can be beated or corona occurs under high electric field action, thus cause the vibration of shell.Power transformer is in operational process, and the magnetostriction of siliconized plate can cause iron coring vibration, and the load current flowing through winding also can produce vibration under the action of a magnetic force.When inside transformer connection metal superstructure loosening also can cause transformer to occur abnormal vibrations.
In prior art, transformer fault detects and mainly contains three classes: 1), by Electric Method also measure local discharge; 2), with the gas decomposition composition of chemical analysis analysis owing to discharging caused.These two class methods are to fault detect and determine that there is certain effect internal fault point position.
Method 1): transformer a, b, c three-phase current can be gathered by current transformer, see and whether occur abnormal harmonic wave.Magnetic field sensor can also be adopted to detect the stationary magnetic field of transformer under direct current biasing serious conditions.Be different from the alternating magnetic field under rated frequency 50HZ.But during due to incipient fault, electric current, voltage, changes of magnetic field amount are very small, require high to transducer sensitivity, this will cause cost price expensive.Electric fault can only be detected.
Method 2): be the gas produced with chemical analysis analysis electric discharge, this carrys out method and detects sensitiveer, just can be able to detect under very faint discharge scenario, the ability given warning in advance can be reached, but chemical method needs receptacle to be placed on inside transformer, and analysis method comparison is complicated, the method can only detect discharge fault.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of transformer fault prior-warning device based on vibration transducer, multiple vibration transducer is adopted to form sensor array, the vibration that sensor transformer shell produces, by analyzing all kinds of waveforms detected, judge whether transformer breaks down, and determine what fault type is further.Thus reach and give warning in advance, safeguard in advance, extend transformer serviceable life, the generation of Accident prevention.
The technical scheme that the utility model is taked is: based on the transformer fault prior-warning device of vibration transducer, comprise installation multiple vibration transducers, power transfer module on the transformer, described vibration transducer connection signal amplifying circuit, signal amplification circuit connecting band bandpass filter circuit, bandwidth-limited circuit connects comparer, one-chip computer module respectively, and one-chip computer module connects comparer, sound and light alarm module and LCD MODULE.
Described signal amplification circuit comprises: one-level amplifying circuit, second amplifying circuit, described vibration transducer connects one-level amplifying circuit, one-level amplifying circuit connecting band bandpass filter circuit, bandwidth-limited circuit connects second amplifying circuit, and second amplifying circuit connects comparer, one-chip computer module respectively.
Described multiple vibration transducer composition sensor array, is fixed on the shell of transformer.Described signal amplification circuit comprises multiple amplifying unit, and each amplifying unit correspondence connects a vibration transducer.Described bandwidth-limited circuit comprises multiple filter unit, and the frequency spectrum of each filter unit is consistent with the frequency spectrum of a vibration transducer.Described comparer comprises and multiplely compares branch road, and each compares the signal of the corresponding vibration transducer of branch road.
Described comparer is by multiplexer channel model calling one-chip computer module.
Described one-chip computer module connects RS-232 communication module.
Described power transfer module comprises :+5V reduction voltage circuit ,-5V voltage conversion circuit.
Described sound and light alarm module comprises LED, hummer.
The utility model is based on the transformer fault prior-warning device of vibration transducer, and adopt multiple vibration transducer to form sensor array, wherein the detection spectral range of each sensor is all different.Vibration transducer is fixed on the shell of transformer, the vibration that sensor transformer shell produces, and vibration signal is entered process by sending into one-chip computer module after later stage signal amplification filtering, one-chip computer module detects transformer normal vibration waveform according to A/D sampled data, and the vibration that potential machinery and electric fault cause.
The utility model is based on the transformer fault prior-warning device of vibration transducer, and advantage is as follows:
1), easy to use, vibration transducer array can be directly installed on transformer case, does not need to change transformer this body structure; 2), measuring ability is comprehensive, not only can detect electric fault, can also detect mechanical fault, but also can be have which kind of reason to cause by vibration frequency failure judgement; 3), adopt multiple vibration transducer to detect simultaneously, improve accuracy in detection and accuracy of detection; 4), because vibration transducer is in direct contact with on transformer, signal intensity accepts stronger.
Accompanying drawing explanation
Fig. 1 is the utility model device connection diagram.
Fig. 2 is the utility model vibration detection and signal processing circuit figure.
Fig. 3 is the utility model device one-chip computer module and peripheral circuit diagram thereof.
Fig. 4 is the utility model installation's power source modular converter circuit diagram.
Embodiment
Free conducting particles can be metal fillings or plain conductor.When free conducting particles is metal fillings, in the electric field caused by motion collision shell, 2KHZ ~ 10KHZ in vibration primary spectrum range set.When free conducting particles is plain conductor, caused vibration frequency mainly concentrates on 6 KHZ ~ 10 KHZ.By the kinetic oscillation intensity of free conducting particles, an a per mille acceleration of gravity even ppt acceleration of gravity can be reached.The rumble spectrum that transformer fe magnetic oscillation causes, the frequency of this mechanical vibration is lower, generally at 250 HZ ~ 1.5 KHZ.But oscillation intensity exceedes the several times of two kinds of intensity above.And DC bias current is higher, core vibration frequency can trend towards low frequency.
Based on the transformer fault prior-warning device of vibration transducer, comprise installation multiple vibration transducers, power transfer module on the transformer, described vibration transducer connection signal amplifying circuit, signal amplification circuit connecting band bandpass filter circuit, bandwidth-limited circuit connects comparer, one-chip computer module respectively, and one-chip computer module connects comparer, sound and light alarm module and LCD MODULE.Described signal amplification circuit comprises: one-level amplifying circuit, second amplifying circuit, described vibration transducer connects one-level amplifying circuit, one-level amplifying circuit connecting band bandpass filter circuit, bandwidth-limited circuit connects second amplifying circuit, and second amplifying circuit connects comparer, one-chip computer module respectively.
After the utility model vibration transducer senses the vibration information of transformer, vibration information low current signal is transmitted in one stage signal amplifying circuit; Small current amplify is become voltage signal by one-level operational amplifier, is then sent in filtering circuit; Filtering circuit carries out filtering process to signal, and filtered signal weakens owing to having.Therefore carry out second time to signal after rate ripple to amplify, amplified signal has two flow directions, directly deliver to the inner A/D of single chip computer AT MEGA16 for one and carry out amplitude sampling, another converts in the external counter of square wave feeding single chip computer AT MEGA16 through comparer and carries out frequency sampling.Final single chip computer AT MEGA16 will collect frequency, amplitude information processes, and be presented on Liquid Crystal Module by analysis result, can also upload to computer by RS-232 communication module.If detection emergency, single chip computer AT MEGA16 can pass through sound and light alarm module prompts operations staff, emergency treatment.
In the utility model vibration detector arrays: have 8 vibration transducers, these 8 sensors are divided into 4 groups:
1): 1#, 2# are the 1st group, spectral range is 50HZ ~ 300 below HZ;
2): 3#, 4# are the 2nd group, spectral range is 250 HZ ~ 2k HZ;
3): 5#, 6# are the 3rd group, and spectral range is 1.5KHZ ~ 7 KHZ;
4): 7#, 8# are the 4th group, spectral range is 6 KHZ ~ 10 KHZ.Have 8 amplifying units in one-level amplifying circuit, the corresponding vibration transducer of each unit, enlargement factor is consistent.
8 filter units are had, respectively corresponding each vibration sensor signal in bandwidth-limited circuit.The frequency spectrum of each filtering circuit unit is consistent with the frequency spectrum of corresponding vibration transducer.8 amplifying circuits are had, the corresponding vibration transducer of each amplifying unit in second amplifying circuit.Enlargement factor is consistent.Comparator circuit also has 8 equally and compares branch road, respectively corresponding each vibration sensor signal.
During circuit illustrates, only will be described introduction to the corresponding branch road of 1# vibration transducer below.
Fig. 2 is for being exactly the signal transacting branch road corresponding to 1# vibration transducer, and this circuit is divided into vibration transducer circuit, one-level amplifying circuit, bandwidth-limited circuit, second amplifying circuit, comparator circuit five parts.As:
1), vibration transducer circuit: comprise resistance R1, R2, R3, electric capacity C1, C2 and sensor LS.This circuit applies power supply excitation to sensor.5V power supply receives the positive pole of FUS-40BT/BR by resistance R1, R2, then meets R3 to ground by vibration transducer negative pole.After vibrations experienced by vibration transducer, generation vibration is that the capacitance of its inside changes, and then vibration transducer two ends form the discharge and recharge of electric current, thus generation current signal.Electric capacity C1 and resistance R1 forms simple 50Hz power filter, reduces ripple to the interference of signal.C2 is capacitance, for the DC component in current signal being removed.
2), one stage signal amplifying circuit: comprise AD620 instrument amplifier UA1, resistance R4.The major function of this circuit converts faint current signal to amplitude very large voltage signal, and enlargement factor can reach 1000 times and can not distortion.
3), bandwidth-limited circuit: comprise 6 OP37A operational amplifiers UB1, UC1, resistance R5, R6, R7, R8, R9, R10, R11, R12, electric capacity C3, C4, C5, C6.This circuit is 50Hz ~ 300Hz bandpass filter, undesired signal in main filtered signal, improves the degree of purity of signal.Have two whereabouts by wave filter signal out, one is that another delivers to comparator circuit directly by the AD pin of the PA0 of terminal A1.
4), second signal amplifying circuit: comprise OP37A operational amplifier UD1, resistance R13, R14, R15 form.The major function of this circuit is amplified filtered signal, because filtering has certain decay to signal.
5), comparator circuit: be made up of three LM393 comparer UE1.The sensor signal of each comparer process one tunnel after amplification filtering, is organized into the square-wave signal of 5V by signal.The square-wave signal that comparator circuit produces is delivered to ADG738 multiplexer channel in Fig. 3 by out1 terminal and is selected chip, and is respectively fracture in exterior I NT0, INT1, INT2, then carries out data processing by single-chip microcomputer.
Fig. 3 is correspondence is single-chip microcomputer and peripheral circuit thereof, and single-chip microcomputer adopts the Atmega16 single-chip microcomputer of Ying Te the Mearl Corporation, is mainly used for pick-up transducers simulating signal, digital signal and drives sound light alarming circuit and carry out Windows Messenger.This modular circuit is mainly divided into five parts:
1), single-chip microcomputer mainly contains six functions:
, by PA0 ~ PA7 pin, A/D collection is carried out to vibration transducer amplified filtered signal, acquisition precision is 1/1024V, and full scale is 5V;
, drive ADG738 multiplexer channel sensor by PC7, PD4, PD5, PD6, and accept square-wave signal with the external interrupt INT0 of PD2 pin, count;
, by pin PC0, PC1 produce low and high level drive hummer and LED;
, by PD0, PD1(RXD, TXD serial pin) come with computer carry out communication.
2), sound and light alarm module: realized by Single-chip Controlling LED and hummer.Sound light alarming circuit includes resistance R1, R2, R3, R4, D1 red LED, NPN triode Q1, Q2, hummer BUZ1.When PC0, PC1 pin produces high level, drive the base stage of triode Q1, Q2, make transistor collector and transmitter conducting, then lightening LED lamp and hummer.
4), the major function of multiplexer channel module: ADG738 is by 8 road comparers square-wave signal out, optionally sends into single-chip microcomputer counting port.S1 ~ S8 as ADG738 in figure is connected respectively at the output port out1 ~ out8 of comparer.No. D(8) be output pin and the INT0(PD2 of single-chip microcomputer) be connected.1,2,3, No. 16 pin of ADG738 is connected with PD6, PC7, PD5, PD4 of single-chip microcomputer respectively.The PC7 pin of single-chip microcomputer is mainly used for control ADG738 and resets, and PD4 ~ PD6 is for that conducting of S1 ~ S8 of control ADG738.
5), RS232 communication module: be utilize the USART serial communication function of single-chip microcomputer and computer to carry out exchanges data.RXD(PD0 by single-chip microcomputer), TXD(PD1) with No. T1IN(11 of U3 protocol conversion module MAX232), No. R1OUT(12) pin is connected.Electric capacity C1, C2 are the filter capacitors of MAX232.No. T1OUT(14 of MAX232), No. R1IN(15) with No. TXD(3 of serial ports P1), RXD (2) is connected.Then be connected with computer by serial ports P1
Fig. 4 is power transfer module: comprise 220V and exchange change 12V DC circuit, 12V to+5V reduction voltage circuit, 12V to-5V translation circuit.9V power supply is provided by lithium battery, and S1 is switch, and D1 is direction diode, prevents battery from connecing and instead burns circuit.
1), 220V exchanges and becomes 12V DC circuit, adopts the switch power module of the WA20-30WH1 model under Ai Pu company, can say that the 220V of civil power exchanges the direct current converting 12V to.
2), 12V to+5V reduction voltage circuit, comprise voltage stabilizing chip 7805, PNP triode Q1, electric capacity C1, C2, resistance R1, light emitting diode D2 forms.No. 1 pin of 7805 meets 12V, and No. 2 pin ground connection, No. 3 pins are that 5V exports, the emitter-base bandgap grading of triode Q1, collector with 7805 No. 1 pin be connected, collector is connected with No. 3 pins, and electric capacity C1, C2 are the power filter of input and output.Resistance R1 and LED D2 is 5V power light, and prompting user 5V power supply is normal.
3), 12V to-5V voltage conversion circuit, comprise voltage stabilizing chip 7905, electric capacity C3, C4, resistance R2, light emitting diode D3 forms.No. 1 pin of 7905 meets 12V, and No. 2 pin ground connection, No. 3 pins are that-5V exports, and electric capacity C3, C4 are the power filter of input and output.Resistance R2 and LED D3 is-5V power light, and prompting user-5V power supply is normal.
Detecting step: step: 1): single-chip microcomputer initialization, AD port initialization, counter T0 initialization; 2): enable counter T0; 3) S1 ~ S8 circulation conducting of control ADG738, by the signal vibration frequency of T0 circulation reading 1 ~ 8# vibration transducer; 4), gather port by A/D and remove the signal amplitude getting 1 ~ No. 8 sensor; 5), by data judge whether to occur incipient fault, if so, then perform " 6 " step, otherwise perform " 7 " step; 6), sound and light alarm; 7), liquid crystal display and serial data are uploaded; 8), turn back to " 3 " circulation to perform.
Claims (5)
1. based on the transformer fault prior-warning device of vibration transducer, comprise installation multiple vibration transducers, power transfer module on the transformer, it is characterized in that, described vibration transducer connection signal amplifying circuit, signal amplification circuit connecting band bandpass filter circuit, bandwidth-limited circuit connects comparer, one-chip computer module respectively, and one-chip computer module connects comparer, sound and light alarm module and LCD MODULE;
Described signal amplification circuit comprises: one-level amplifying circuit, second amplifying circuit, described vibration transducer connects one-level amplifying circuit, one-level amplifying circuit connecting band bandpass filter circuit, bandwidth-limited circuit connects second amplifying circuit, and second amplifying circuit connects comparer, one-chip computer module respectively;
Described multiple vibration transducer composition sensor array, is fixed on the shell of transformer;
Described signal amplification circuit comprises multiple amplifying unit, and each amplifying unit correspondence connects a vibration transducer;
Described bandwidth-limited circuit comprises multiple filter unit, and the frequency spectrum of each filter unit is consistent with the frequency spectrum of a vibration transducer;
Described comparer comprises and multiplely compares branch road, and each compares the signal of the corresponding vibration transducer of branch road.
2. according to claim 1 based on the transformer fault prior-warning device of vibration transducer, it is characterized in that, described comparer is by multiplexer channel model calling one-chip computer module.
3. according to claim 1 based on the transformer fault prior-warning device of vibration transducer, it is characterized in that, described one-chip computer module connects RS-232 communication module.
4. according to claim 1 based on the transformer fault prior-warning device of vibration transducer, it is characterized in that, described power transfer module comprises :+5V reduction voltage circuit ,-5V voltage conversion circuit.
5. according to claim 1 based on the transformer fault prior-warning device of vibration transducer, it is characterized in that, described sound and light alarm module comprises LED, hummer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420089397.1U CN204064443U (en) | 2014-02-28 | 2014-02-28 | Based on the transformer fault prior-warning device of vibration transducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420089397.1U CN204064443U (en) | 2014-02-28 | 2014-02-28 | Based on the transformer fault prior-warning device of vibration transducer |
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| CN204064443U true CN204064443U (en) | 2014-12-31 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104677267A (en) * | 2015-02-02 | 2015-06-03 | 九江精达检测技术有限公司 | Rotary inductosyn with strong electromagnetic interference resisting capability and preparation method thereof |
| CN105181127A (en) * | 2015-11-05 | 2015-12-23 | 浙江安侣智能科技有限公司 | Bridge fault detection device |
| CN105223454A (en) * | 2015-11-05 | 2016-01-06 | 浙江安侣智能科技有限公司 | The failure detector of gas insulated combined electric appliance equipment |
| CN105444873A (en) * | 2015-11-05 | 2016-03-30 | 浙江安侣智能科技有限公司 | Fault detection device for railway equipment |
| CN105911465A (en) * | 2016-04-25 | 2016-08-31 | 国网新疆电力公司检修公司 | Circuit breaker switch state detection device based on principle of magnetic field |
| CN106802196A (en) * | 2017-01-16 | 2017-06-06 | 中国计量大学 | For the electronic thermometer buzzer sound sound detection device and method of automatic Verification |
| CN108593091A (en) * | 2018-04-28 | 2018-09-28 | 哈尔滨工程大学 | A kind of fault diagnosis and health monitoring device based on piezoelectric vibration energy collection |
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2014
- 2014-02-28 CN CN201420089397.1U patent/CN204064443U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104677267A (en) * | 2015-02-02 | 2015-06-03 | 九江精达检测技术有限公司 | Rotary inductosyn with strong electromagnetic interference resisting capability and preparation method thereof |
| CN105181127A (en) * | 2015-11-05 | 2015-12-23 | 浙江安侣智能科技有限公司 | Bridge fault detection device |
| CN105223454A (en) * | 2015-11-05 | 2016-01-06 | 浙江安侣智能科技有限公司 | The failure detector of gas insulated combined electric appliance equipment |
| CN105444873A (en) * | 2015-11-05 | 2016-03-30 | 浙江安侣智能科技有限公司 | Fault detection device for railway equipment |
| CN105911465A (en) * | 2016-04-25 | 2016-08-31 | 国网新疆电力公司检修公司 | Circuit breaker switch state detection device based on principle of magnetic field |
| CN106802196A (en) * | 2017-01-16 | 2017-06-06 | 中国计量大学 | For the electronic thermometer buzzer sound sound detection device and method of automatic Verification |
| CN106802196B (en) * | 2017-01-16 | 2023-07-18 | 中国计量大学 | Electronic thermometer buzzer sound detection device and method for automatic verification |
| CN108593091A (en) * | 2018-04-28 | 2018-09-28 | 哈尔滨工程大学 | A kind of fault diagnosis and health monitoring device based on piezoelectric vibration energy collection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20160228 |