CN105093057A - Diagnosis test method for fault of circuit module - Google Patents
Diagnosis test method for fault of circuit module Download PDFInfo
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- CN105093057A CN105093057A CN201510611678.8A CN201510611678A CN105093057A CN 105093057 A CN105093057 A CN 105093057A CN 201510611678 A CN201510611678 A CN 201510611678A CN 105093057 A CN105093057 A CN 105093057A
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- circuit module
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Abstract
The invention discloses a diagnosis test method for a fault of a circuit module. The diagnosis test method comprises the steps of a first step, connecting a first diagnostic circuit with the upstream side of a to-be-tested circuit module, and connecting a second diagnostic circuit with the downstream side of the to-be-tested circuit module; a second step, performing isolated induction on a received vector voltage/current signal by the first diagnostic circuit for generating a first vector comparison signal, directly generating a second vector comparison signal by the second diagnostic circuit from the received vector voltage/current signal; and a third step, calculating a difference between the first vector comparison signal and the second vector comparison signal, if the difference is in a preset range, determining no fault in the to-be-tested circuit module; and if the difference exceeds the preset range, determining a fault in the to-be-tested circuit module. The diagnosis test method can be used for diagnosing the fault of the circuit module and switching off a lower circuit module when the fault occurs, thereby protecting the circuit module. Furthermore simple and convenient operation is realized.
Description
Technical field
The invention belongs to power equipment electrical test technical field, be applicable to, under equipment running status, diagnose the carrying out of circuit module fault.
Background technology
The many employings of electric-power metering be split type analog element or pointer instrument, measuring different parameters needs to install different measuring equipment, and is disassembled by temporary transient no measuring equipment.In the process measured, too complicated owing to measuring wiring, once wiring error in dismounting and Renewal process, easily cause security incident, cause serious consequence.In order to ensure the security of multifunction electric meter, switchgear, the different test instrumentations of installation all require to have obvious safety instruction and wiring specification, but these work still can not avoid the generation of accident completely.
For the above-mentioned defect of split type analog element and pointer instrument, market investigated the power test instrument of alternative above equipment, these power test instruments often have several test function concurrently, once installation, multinomial data can be measured, reduce the complexity of equipment replacement and the difficulty of test job.But power test instrument in the market still can only according to measuring the monitoring and the measurement that require to provide some specific function, cannot diagnose the wiring error of installation process and multifunction electric meter, switch cubicle running status, once occur wiring error or occur short circuit in operational process, all burning of the electronic equipment such as multifunction electric meter, switch cubicle can be caused.
Summary of the invention
An object of the present invention is to solve at least the problems referred to above and/or defect, and the advantage will illustrated at least is below provided.
A further object of the invention there is provided a kind of diagnostic test method of circuit module fault, first accesses the first diagnostic loop at the upstream extremity of circuit module to be detected, and in the downstream end access second opinion loop of circuit module to be detected; Then vector voltage/the current signal received is isolated induction generation first vector comparison signal by described first diagnostic loop by precision transformer, and the vector voltage/current signal received directly is generated the second vector comparison signal by described second opinion loop; Finally calculate the difference of the first vector comparison signal and the second vector comparison signal, if this difference is positioned at preset range, then think that this circuit module to be detected does not exist fault; If this difference exceeds preset range, then think that this circuit module to be detected exists fault; The diagnostic test method of this circuit module fault is simple, operating aspect, can detect because wiring makes mistakes the short circuit phenomenon occurred in the short circuit and operational process caused in circuit, and then cut off subordinate's circuit module, play a protective role to circuit module.
A further object of the invention is first reduced by received vector voltage/current signal described relay commutation circuit and operational amplifier linear amplifier circuit, then the size of the first vector comparison signal and the second vector comparison signal is detected, if too small, received vector voltage/current signal progressively amplifies by described relay commutation circuit and operational amplifier linear amplifier circuit again.First being reduced by received vector voltage/current signal, is prevent that vector voltage/current signal is excessive causes puncturing or burning of circuit module; If too small, received vector voltage/current signal progressively amplifies by described relay commutation circuit and operational amplifier linear amplifier circuit again, because the first vector ratio comparatively signal gets too small, or the second vector ratio comparatively signal gets too small will cause the first vector comparison signal and the second vector comparison signal cannot being compared, then cannot to circuit module diagnosing malfunction.
In order to realize according to these objects of the present invention and other advantages, provide a kind of diagnostic test method of circuit module fault, described circuit module is arranged in performance loop, comprises the following steps:
Step one, access the first diagnostic loop at the upstream extremity of circuit module to be detected, and in the downstream end access second opinion loop of circuit module to be detected, wherein, described first diagnostic loop receives the vector voltage/current signal of described upstream extremity, and described second opinion loop receives the vector voltage/current signal of described downstream end;
Vector voltage/the current signal received is isolated induction generation first vector comparison signal by step 2, described first diagnostic loop by precision transformer, the vector voltage/current signal received directly is generated the second vector comparison signal by described second opinion loop;
Step 3, calculate the difference of the first vector comparison signal and the second vector comparison signal, if this difference is positioned at preset range, then think that this circuit module to be detected does not exist fault; If this difference exceeds preset range, then think that this circuit module to be detected exists fault.
Preferably, in the diagnostic test method of described circuit module fault, described vector voltage/current signal is: with complex representation vector, wherein real number is range value, and imaginary number is angle value, and described difference comprises real number difference and imaginary number difference, wherein any one exceeds preset range, then assert to there is fault.
Preferably, in the diagnostic test method of described circuit module fault, described exist fault and be divided into oscillation compensation and fault handling according to predetermined condition, and wherein oscillation compensation is that the Received signal strength of another circuit module of the downstream end of this circuit module compensates in this performance loop; Fault handling is perform to this another circuit module the process cut off or change running parameter.
Preferably, in the diagnostic test method of described circuit module fault, include relay commutation circuit and operational amplifier linear amplifier circuit in described first diagnostic loop and described second opinion loop, both it, combine the zoom operations realized received vector voltage/current signal.
Preferably, in the diagnostic test method of described circuit module fault, first received vector voltage/current signal reduces by described relay commutation circuit and operational amplifier linear amplifier circuit, then the size of the first vector comparison signal and the second vector comparison signal is detected, if too small, received vector voltage/current signal progressively amplifies by described relay commutation circuit and operational amplifier linear amplifier circuit again.
Preferably, in the diagnostic test method of described circuit module fault, the vector voltage/current signal received is isolated induction by described first diagnostic loop during by precision transformer, coefficient of mutual inductance is between 100: 1 ~ 8.
Preferably, in the diagnostic test method of described circuit module fault, described angle difference with the sine value sin of angle difference substitute.
Preferably, in the diagnostic test method of described circuit module fault, in the first vector comparison signal calculated and the difference of the second vector comparison signal, also remove and the resistance in the first diagnostic loop and second opinion loop is compensated.
Preferably, in the diagnostic test method of described circuit module fault, described vector voltage/the current signal received is after zoom operations, or through mutual inductance after linear change, when the difference of calculating first vector comparison signal and the second vector comparison signal, by being multiplied by corresponding coefficient and the order of magnitude before recovering convergent-divergent or before mutual inductance.
The present invention at least comprises following beneficial effect:
1, the diagnostic test method of circuit module fault of the present invention, first accesses the first diagnostic loop at the upstream extremity of circuit module to be detected, and in the downstream end access second opinion loop of circuit module to be detected; Then vector voltage/the current signal received is isolated induction generation first vector comparison signal by described first diagnostic loop by precision transformer, and the vector voltage/current signal received directly is generated the second vector comparison signal by described second opinion loop; Finally calculate the difference of the first vector comparison signal and the second vector comparison signal, if this difference is positioned at preset range, then think that this circuit module to be detected does not exist fault; If this difference exceeds preset range, then think that this circuit module to be detected exists fault; The diagnostic test method of this circuit module fault is simple, operating aspect, can detect because wiring makes mistakes the short circuit phenomenon occurred in the short circuit and operational process caused in circuit, and then cut off subordinate's circuit module, play a protective role to circuit module.
2, first received vector voltage/current signal is reduced by described relay commutation circuit and operational amplifier linear amplifier circuit, then the size of the first vector comparison signal and the second vector comparison signal is detected, if too small, received vector voltage/current signal progressively amplifies by described relay commutation circuit and operational amplifier linear amplifier circuit again.First being reduced by received vector voltage/current signal, is prevent that vector voltage/current signal is excessive causes puncturing or burning of circuit module; If too small, received vector voltage/current signal progressively amplifies by described relay commutation circuit and operational amplifier linear amplifier circuit again, because the first vector ratio comparatively signal gets too small, or the second vector ratio comparatively signal gets too small will cause the first vector comparison signal and the second vector comparison signal cannot being compared, then cannot to circuit module diagnosing malfunction.
3, be divided into oscillation compensation and fault handling in fault according to predetermined condition, wherein oscillation compensation is that the Received signal strength of another circuit module of the downstream end of this circuit module compensates in this performance loop; Fault handling is perform to this another circuit module the process cut off or change running parameter.Sometimes can there is higher voltage or electric current suddenly in circuit module, voltage or the electric current of this unexpected increase can return to normal value suddenly, and the Received signal strength of another circuit module of the downstream end of circuit module is compensated, avoid this emergent higher voltage or electric current as fault handling.
4, when the vector voltage/current signal received is isolated induction by the first diagnostic loop by precision transformer, coefficient of mutual inductance is between 100: 1 ~ 8, and coefficient of mutual inductance is between 100: 1 ~ 8, and copper wire amount used is few, can play cost-saving object.
Part is embodied by explanation below by other advantage of the present invention, target and feature, part also will by research and practice of the present invention by those skilled in the art is understood.
Accompanying drawing explanation
Fig. 1 is the schematic circuit of circuit module in the diagnostic test method of circuit module fault of the present invention;
Fig. 2 is the schematic diagram of the first vector comparison signal in the present invention's circuit module to be detected and the second vector comparison signal;
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to instructions word to make those skilled in the art.
As shown in Figure 1, the invention provides a kind of diagnostic test method of circuit module fault, described circuit module is arranged in performance loop, comprises the following steps:
Step one, access the first diagnostic loop 1 at the upstream extremity of circuit module to be detected, and in the downstream end access second opinion loop 2 of circuit module to be detected, wherein, described first diagnostic loop 1 receives the vector voltage/current signal of described upstream extremity, and described second opinion loop 2 receives the vector voltage/current signal of described downstream end;
Vector voltage/the current signal received is isolated induction generation first vector comparison signal by step 2, described first diagnostic loop 1 by precision transformer 5, the vector voltage/current signal received directly is generated the second vector comparison signal by described second opinion loop 2;
Step 3, calculate the difference of the first vector comparison signal and the second vector comparison signal, if this difference is positioned at preset range, then think that this circuit module to be detected does not exist fault; If this difference exceeds preset range, then think that this circuit module to be detected exists fault.The diagnostic test method of this circuit module fault is simple, operating aspect, can detect because wiring makes mistakes the short circuit phenomenon occurred in the short circuit and operational process caused in circuit, and then cut off subordinate's circuit module, play a protective role to circuit module.
In the diagnostic test method of described circuit module fault, described vector voltage/current signal is: with complex representation vector, wherein real number is range value, and imaginary number is angle value, and described difference comprises real number difference and imaginary number difference, wherein any one exceeds preset range, then assert to there is fault.
As shown in Figure 2, described difference comprises:
Amplitude difference:
Differential seat angle:
In formula: U
1represent that the vector voltage that the first diagnostic loop 1 receives described upstream extremity isolates induction generation first vector comparison signal by precision transformer;
U
2represent that the vector voltage signal received directly is generated the second vector comparison signal by second opinion loop 2;
represent the angle of the second vector comparison signal;
represent Δ U=|U
1-U
2| angle.
F represents U
1and U
2amplitude difference;
δ represents U
1and U
2differential seat angle;
In the diagnostic test method of described circuit module fault, described exist fault and be divided into oscillation compensation and fault handling according to predetermined condition, wherein oscillation compensation is that the Received signal strength of another circuit module of the downstream end of this circuit module compensates in this performance loop; Fault handling is perform to this another circuit module the process cut off or change running parameter.Arranging oscillation compensation is because can occur suddenly if current value is the super-large current of 80A or 100A in circuit module, but this electric current returns to normal value again in the very short time, if now as fault handling, so just another circuit module is performed and cut off or change running parameter, the diagnosis that can make the mistake like this, now the Received signal strength of another circuit module of the downstream end of this circuit module is compensated, the judgement of this mistake will be avoided.
In the diagnostic test method of described circuit module fault, include relay commutation circuit and operational amplifier linear amplifier circuit in described first diagnostic loop 1 and described second opinion loop 2, both it, combine the zoom operations realized received vector voltage/current signal.
In the diagnostic test method of described circuit module fault, first received vector voltage/current signal reduces by described relay commutation circuit and operational amplifier linear amplifier circuit, then the size of the first vector comparison signal and the second vector comparison signal is detected, if too small, received vector voltage/current signal progressively amplifies by described relay commutation circuit and operational amplifier linear amplifier circuit again.First reduced by received vector voltage/current signal, be prevent that vector voltage/current signal is excessive causes puncturing or burning of circuit module, the time as longer in electric current in circuit module is 100A, will cause puncturing or burning of circuit module; If too small, received vector voltage/current signal progressively amplifies by described relay commutation circuit and operational amplifier linear amplifier circuit again, because the first vector ratio comparatively signal gets too small, or the second vector ratio comparatively signal gets too small will cause the first vector comparison signal and the second vector comparison signal cannot being compared, then cannot to circuit module diagnosing malfunction, if magnitude of voltage in the first vector signal is 20V, and when in the second vector signal, magnitude of voltage is 0.3V, will cause cannot to circuit module diagnosing malfunction.
In the diagnostic test method of described circuit module fault, the vector voltage/current signal received is isolated induction by described first diagnostic loop 1 during by precision transformer, coefficient of mutual inductance is between 100: 1 ~ 8.Coefficient of mutual inductance is between 100: 1 ~ 8, and copper wire amount used is few, can play cost-saving object.
In the diagnostic test method of described circuit module fault, described angle difference with the sine value sin of angle difference substitute.Because the differential seat angle of U1 and U2 is less, thus differential seat angle difference with sine value sin substitute.
In the diagnostic test method of described circuit module fault, in the first vector comparison signal calculated and the difference of the second vector comparison signal, also remove and the resistance in the first diagnostic loop 1 and second opinion loop 2 is compensated.
In the diagnostic test method of described circuit module fault, described vector voltage/the current signal received is after zoom operations, or through mutual inductance after linear change, when the difference of calculating first vector comparison signal and the second vector comparison signal, by being multiplied by corresponding coefficient and the order of magnitude before recovering convergent-divergent or before mutual inductance.
Principle of work: as described in Figure 1, the first diagnostic loop 1 is accessed at the upstream extremity of circuit module to be detected, and in the downstream end access second opinion loop 2 of circuit module to be detected, wherein, described first diagnostic loop 1 receives the vector voltage signal of described upstream extremity, and described second opinion loop 2 receives the vector voltage signal of described downstream end; The vector voltage signal received is isolated induction generation first vector comparison signal U by described first diagnostic loop 1 by precision transformer 5
1, the vector voltage signal received directly is generated the second vector comparison signal U by described second opinion loop 2
2; Calculate the first vector comparison signal U
1with the second vector comparison signal U
2difference, if this difference is positioned at preset range, then think that this circuit module to be detected does not exist fault; If this difference exceeds preset range, then think that this circuit module to be detected exists fault.The diagnostic test method of this circuit module fault is simple, operating aspect, can detect because wiring makes mistakes the short circuit phenomenon occurred in the short circuit and operational process caused in circuit, and then cut off subordinate's circuit module, play a protective role to circuit module.U
1and U
2all sampled by standard sample 3, and amplitude difference f and differential seat angle δ is by difference sampling 4 sampling, include operational amplifier linear amplifier circuit and digital simulation switch in described difference sampling 3 and difference sampling 4, both it, combine the zoom operations realized received vector voltage/current signal;
Although embodiment of the present invention are open as above, it is not restricted to listed in instructions and embodiment utilization.It can be applied to various applicable the field of the invention completely.For those skilled in the art, can easily realize other amendment.Therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the embodiment described.
Claims (9)
1. a diagnostic test method for circuit module fault, described circuit module is arranged in performance loop, it is characterized in that, comprises the following steps:
Step one, access the first diagnostic loop at the upstream extremity of circuit module to be detected, and in the downstream end access second opinion loop of circuit module to be detected, wherein, described first diagnostic loop receives the vector voltage/current signal of described upstream extremity, and described second opinion loop receives the vector voltage/current signal of described downstream end;
Vector voltage/the current signal received is isolated induction generation first vector comparison signal by step 2, described first diagnostic loop by precision transformer, the vector voltage/current signal received directly is generated the second vector comparison signal by described second opinion loop;
Step 3, calculate the difference of the first vector comparison signal and the second vector comparison signal, if this difference is positioned at preset range, then think that this circuit module to be detected does not exist fault; If this difference exceeds preset range, then think that this circuit module to be detected exists fault.
2. the diagnostic test method of circuit module fault as claimed in claim 1, it is characterized in that, described vector voltage/current signal is: with complex representation vector, wherein real number is range value, and imaginary number is angle value, and described difference comprises real number difference and imaginary number difference, wherein any one exceeds preset range, then assert to there is fault.
3. the diagnostic test method of circuit module fault as claimed in claim 1 or 2, it is characterized in that, described exist fault and be divided into oscillation compensation and fault handling according to predetermined condition, wherein oscillation compensation is that the Received signal strength of another circuit module of the downstream end of this circuit module compensates in this performance loop; Fault handling is perform to this another circuit module the process cut off or change running parameter.
4. the diagnostic test method of circuit module fault as claimed in claim 3, it is characterized in that, include relay commutation circuit and operational amplifier linear amplifier circuit in described first diagnostic loop and described second opinion loop, both it, combine the zoom operations realized received vector voltage/current signal.
5. the diagnostic test method of circuit module fault as claimed in claim 4, it is characterized in that, first received vector voltage/current signal reduces by described relay commutation circuit and operational amplifier linear amplifier circuit, then the size of the first vector comparison signal and the second vector comparison signal is detected, if too small, received vector voltage/current signal progressively amplifies by described relay commutation circuit and operational amplifier linear amplifier circuit again.
6. the diagnostic test method of circuit module fault as claimed in claim 1, it is characterized in that, the vector voltage/current signal received is isolated induction by described first diagnostic loop during by precision transformer, coefficient of mutual inductance is between 100: 1 ~ 8.
7. the diagnostic test method of circuit module fault as claimed in claim 2, is characterized in that, described angle difference with the sine value sin of angle difference substitute.
8. the diagnostic test method of circuit module fault as claimed in claim 2, is characterized in that, in the first vector comparison signal calculated and the difference of the second vector comparison signal, also removes and compensates the resistance in the first diagnostic loop and second opinion loop.
9. the diagnostic test method of the circuit module fault as described in claim 4 or 6, it is characterized in that, described vector voltage/the current signal received is after zoom operations, or through mutual inductance after linear change, when the difference of calculating first vector comparison signal and the second vector comparison signal, by being multiplied by corresponding coefficient and the order of magnitude before recovering convergent-divergent or before mutual inductance.
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| CN202840519U (en) * | 2012-09-12 | 2013-03-27 | 上海市电力公司 | Dynamic voltage fluctuation compensator for realizing multi-target control |
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2015
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Patent Citations (9)
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| CN1454320A (en) * | 2000-04-24 | 2003-11-05 | 陆放 | System configuration and methods for on-the-fly testing of integrated circuits |
| US20060103391A1 (en) * | 2004-11-02 | 2006-05-18 | Parker Kenneth P | Methods and apparatus for non-contact testing and diagnosing of inaccessible shorted connections |
| EP1922554A1 (en) * | 2005-09-07 | 2008-05-21 | TRW Systems Ltd | Current measurement circuit and method of diagnosing faults in same |
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Application publication date: 20151125 |