CN101713807A - High-speed signal acquisition based device and method for recording and analyzing locomotive movably grounded fault - Google Patents
High-speed signal acquisition based device and method for recording and analyzing locomotive movably grounded fault Download PDFInfo
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- CN101713807A CN101713807A CN200910190082A CN200910190082A CN101713807A CN 101713807 A CN101713807 A CN 101713807A CN 200910190082 A CN200910190082 A CN 200910190082A CN 200910190082 A CN200910190082 A CN 200910190082A CN 101713807 A CN101713807 A CN 101713807A
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Abstract
The invention relates to a high-speed signal acquisition based device for recording and analyzing locomotive movably grounded faults, which comprises an excitation signal generating unit, a grounded signal detector and a signal analyzing unit, wherein the excitation signal generating unit is used for outputting characteristic excitation signals to a locomotive line to be detected; the grounded signal detector is used for detecting characteristic movably grounded signals on the line to be detected; and the signal analyzing unit is used for carrying out high-speed acquisition and recording for the movably grounded detection signals output by the grounded signal detector, and analyzing and diagnosing whether movably grounded faults of a locomotive electrical apparatus line exist or not by a digital signal analyzing method. The invention also provides a high-speed signal acquisition based method for recording and analyzing the locomotive movably grounded faults. The invention realizes the analysis and diagnosis of the movably grounded faults in a specific line through recording and analyzing the characteristic movably grounded signals in the line to be detected, thereby rapidly and accurately diagnosing the movably grounded faults of the locomotive electrical apparatus line and the accurate position of a movably grounded fault position, and improving the accuracy and efficiency of movably grounded fault diagnosis.
Description
Technical field
The present invention relates to the electric circuit inspection field, relate in particular to a kind of locomotive swinging earth failure logging analytical equipment and method based on high-speed signal acquisition.
Background technology
The electric appliance circuits of railway locomotive comprises synchronous traction generator, rectifier cabinet, traction motor and connection line etc.Because traction motor is hung on the crossbeam of bogie, constantly vibrated and impacted, and worked in the open, be subjected to the invasion and attack of rain, snow, wind, sand, make and the insulating capacity variation of this traction motor make the locomotive electric apparatus circuit have the risk of swinging earth (instant earthing).In addition, along with the railway locomotive travelling speed improves constantly, traction load continues to increase, and makes that the phenomenon of locomotive electric apparatus circuit generation swinging earth is more and more frequent.In case the locomotive electric apparatus circuit takes place by swinging earth, will cause short circuit, thereby make pulling electric generator because of the excessive scaling loss of electric current, has a strong impact on the safe operation of locomotive, cause the chaotic of transport order even cause security incident.
Past generally removes traction motor, removes rectifier cabinet by exclusive method because detection means falls behind, and locomotive electric apparatus circuit swinging earth fault is difficult to search, and labour intensity is big.And need to go up repeatedly thread test in the locomotive testing process, it is wide to involve department, and the troubleshooting cycle is long.The swinging earth of causing if not traction motor or main rectifier cabinet, but because the major loop swinging earth that equipment or components and parts such as the breakage of circuit point insulating, main contactor cause is found and is got rid of extremely difficult especially.
At present, the detection of locomotive electric apparatus circuit swinging earth mainly contains following several method:
1, balance resistance method:
This method passes through to insert two resistance that size is identical between positive and negative busbar, middle ground, and an ohmically voltage comes judgment device or circuit swinging earth fault by measuring wherein.Though this method can be judged positive bus-bar swinging earth fault and negative busbar swinging earth fault exactly, can't diagnose the particular location of efficient earth fault, can't point out that promptly the swinging earth fault has appearred in which loop.
2, working current differential technique:
The variation of the difference of this method by detecting each branch road working current judges that the swinging earth fault appears in a certain branch road.Though this method can detect the particular location of swinging earth fault, because the working current of equipment is bigger, and the swinging earth electric current is often very little, and the very little error of current sensor all can be greater than the swinging earth electric current, so this method rate of false alarm and rate of failing to report are higher.
3, oscillator signal detection method:
The principle of this method is: when the swinging earth fault occurring, oscillator produces oscillator signal and is added on the tested branch road, and the detection oscillator signal of popping one's head in is simultaneously judged the swinging earth fault.This method can detect the particular location of swinging earth fault, but shortcoming is: rate of false alarm and rate of failing to report are higher.On the one hand from detecting the swinging earth fault, the oscillator starting of oscillation detects oscillator signal to probe, needs the regular hour, therefore a lot of times weak point the swinging earth fault detect less than.On the other hand, because the working current of equipment is bigger, the undesired signal of various frequencies is very strong, and the swinging earth electric current is often very little, and useful measuring-signal is mixed among the very strong undesired signal, is difficult to differentiate.And because the zero point drift of device, oscillation frequency has deviation, causes useful measuring-signal to be difficult to differentiate.These factors all cause this method rate of false alarm and rate of failing to report higher.
More than several locomotive electric apparatus circuit swinging earth detection methods owing to be subjected to the restriction swinging earth fault detect rate of false alarm and the rate of failing to report of technical conditions higher, be difficult to come into operation, the method that railway locomotive department still adopts the equipment of removing repeatedly, go up thread test is repeatedly searched and is got rid of the swinging earth fault.
Summary of the invention
The technical problem to be solved in the present invention is, detects accurate inadequately problem in detecting at above-mentioned locomotive electric apparatus circuit swinging earth, and a kind of locomotive swinging earth failure logging analytical equipment and method based on high-speed signal acquisition is provided.
The technical scheme that the present invention solves the problems of the technologies described above is, a kind of locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition is provided, and comprising:
The pumping signal generating unit is used for the to be detected circuit of output characteristic pumping signal to locomotive;
The ground signalling detecting device is used to detect the feature swinging earth signal on the described circuit to be detected;
Signal analysis unit is used for the swinging earth detection signal of described ground signalling detecting device output is carried out high speed acquisition and record, and whether has locomotive electric apparatus circuit swinging earth fault with the Digital Signal Analysis methods analyst with diagnosis.
In the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition of the present invention, described ground signalling detecting device comprises the entrance point that is fixedly mounted on circuit to be detected respectively and first detecting unit and second detecting unit of endpiece, and described first detecting unit is oppositely installed parallel-series with second detecting unit and is connected.
In the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition of the present invention, the fixed sturcture that each in described first detecting unit and second detecting unit comprises an iron core, is wrapped in the coil on the described iron core and cable is fixed on described core center position.
In the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition of the present invention, also comprise first processing unit, the frequency of frequency undesired signal minimum that is used for selecting to output to the locomotive circuit according to the feedback of signal analysis unit is as the frequency of the feature pumping signal of described pumping signal generating unit output, and described feature pumping signal is selected frequency square-wave signal.
In the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition of the present invention, described device comprises a plurality of ground signalling detecting devices at the circuit different to be detected place that is installed in locomotive respectively, and each ground signalling detecting device comprises the entrance point that is fixedly mounted on circuit to be detected respectively and first detecting unit and second detecting unit of endpiece.
In the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition of the present invention, described signal analysis unit comprises second processing unit, operational amplifier, bandpass filter able to programme, the high-speed synchronous A/D converter, rectifier, wave filter, attenuator circuit, the standard reference signal generator, rectifier wherein, wave filter, attenuator circuit connects successively and the input end of described rectifier is connected to the output terminal of pumping signal generating unit, two input ends of described comparer are connected respectively to the output terminal of attenuator circuit and standard reference signal generator and to high-speed synchronous A/D converter output trigger pip, described ground signalling detecting device is exported the swinging earth detection signal via operational amplifier and bandpass filter able to programme to the high-speed synchronous A/D converter, and the output terminal of described high-speed synchronous A/D converter is connected to second processing unit.
In the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition of the present invention, described second processing unit high speed acquisition record swinging earth trigger pip and multichannel swinging earth detection signal, and described swinging earth detection signal and swinging earth trigger pip carried out analyzing and processing with the Digital Signal Analysis method, extract swinging earth fault signature signal, the swinging earth fault whether occurs to diagnose out circuit to be detected.
In the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition of the present invention, also comprise storage unit, a plurality of swinging earth detection signals in each 1 second and the waveform of swinging earth trigger pip stored described storage unit into before and after described second processing unit will trigger constantly when life earth fault is set out in diagnosis.
The present invention also provides a kind of locomotive swinging earth failure logging analytical approach based on high-speed signal acquisition, may further comprise the steps:
(a) the output characteristic pumping signal is to the circuit to be detected of locomotive;
(b) the feature swinging earth signal on the described circuit to be detected of detection;
(c) the detected signal of described ground signalling detecting device is carried out high speed acquisition and record, and whether have locomotive electric apparatus circuit swinging earth fault with diagnosis with the Digital Signal Analysis methods analyst.
In the locomotive swinging earth failure logging analytical approach based on high-speed signal acquisition of the present invention, described step (c) comprising:
(c1) use comparer to compare, and comparative result is converted to digital signal as the swinging earth trigger pip through rectification, filtered feature pumping signal and standard reference signal;
(c2) high-speed sampling multichannel swinging earth detection signal and swinging earth trigger pip;
(c3) described swinging earth detection signal and swinging earth trigger pip are carried out analyzing and processing with the Digital Signal Analysis method, extract swinging earth fault signature signal, the swinging earth fault whether occurs to diagnose out circuit to be detected;
(c4) intactly note the swinging earth fault occur before and after each one second swinging earth detection signal and the waveform of swinging earth trigger pip.
Locomotive swinging earth failure logging analytical equipment and method based on high-speed signal acquisition of the present invention, brightly realized the record analysis of swinging earth fault in the specific circuit by the feature swinging earth signal in the record analysis circuit to be detected, thereby diagnose out locomotive electric apparatus circuit swinging earth fault rapidly and accurately and diagnose the accurate position of efficient earth fault, improved the accuracy and the efficient of swinging earth fault diagnosis.The swinging earth signal waveform that the present invention also can provide the swinging earth fault moment to occur is carried out analyzing and diagnosing for the expert, for the maintenance job of swinging earth fault provides guidance.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the synoptic diagram that the present invention is based on the locomotive swinging earth failure logging analytical equipment of high-speed signal acquisition;
Fig. 2 is the structural representation of an instantiation installing among Fig. 1;
Fig. 3 is the installation site synoptic diagram of the ground signalling detecting device among Fig. 1;
Fig. 4 is the structural representation of an instantiation of ground signalling detecting device among Fig. 1;
Fig. 5 is the structural representation of an instantiation of pumping signal generating unit among Fig. 1;
Fig. 6 is the structural representation of an instantiation of signal analysis unit among Fig. 1;
Fig. 7 is the oscillogram of the feature pumping signal that the pumping signal generating unit generates among Fig. 1;
Fig. 8 is the swinging earth trigger pip and the swinging earth detection signal waveform figure of record;
Fig. 9 is the process flow diagram that the present invention is based on the locomotive swinging earth failure logging analytical approach of high-speed signal acquisition.
Embodiment
The present invention is by the characteristic signal in the collection circuit to be detected, and accurate position takes place the characteristic signal analyzing and diagnosing swinging earth that use is gathered.
As shown in Figure 1, be the synoptic diagram that the present invention is based on the locomotive swinging earth failure logging analytical equipment embodiment of high-speed signal acquisition.This device comprises pumping signal generating unit 11, ground signalling detecting device 12 and signal analysis unit 13, and wherein ground signalling detecting device 12 is installed on the circuit 10 to be detected, and pumping signal generating unit 11 then is connected to circuit 10 to be detected.
Pumping signal generating unit 11 is used for the to be detected circuit 10 of output characteristic pumping signal to locomotive, and wherein the feature pumping signal is that magnitude of voltage constant (for example being 220V), frequency are the electric signal of setpoint frequency, and is for example shown in Figure 7.
Ground signalling detecting device 12 is used to detect the feature swinging earth signal on the circuit 10 to be detected and this signal is outputed to signal analysis unit as the swinging earth detection signal, and wherein feature swinging earth signal is produced by the irregular change of feature pumping signal in the circuit 10 to be detected.In order to realize that whole locomotive electric apparatus circuit is detected, can ground signalling detecting device 12 be set respectively at the diverse location (section) of electric appliance circuits.
As shown in Figure 3, the locomotive electric apparatus circuit can be divided into a plurality of track sections to be detected, 1 winding earth signal detecting device 12 is set in each section, each winding earth signal detecting device 12 comprises sheathed respectively and is fixedly mounted on the entrance point of circuit to be detected and first detecting unit and second detecting unit of endpiece, and first detecting unit and second detecting unit are oppositely installed.The output signal series connection back of first detecting unit and second detecting unit is as the swinging earth detection signal of this section circuit to be detected.
When the locomotive electric apparatus circuit did not have the swinging earth fault, the feature pumping signal in the circuit to be detected did not have saltus step, and first detecting unit and second detecting unit all do not have characteristic signal output, do not have the characteristic signal composition in the differentiated swinging earth detection signal thereby get yet.The trouble spot is not on this section circuit to be detected if the swinging earth fault appears in the locomotive electric apparatus circuit, and characteristic current (being current-jump) does not flow through this section circuit to be detected, first detecting unit and second detecting unit all do not have characteristic signal, get and do not have the characteristic signal composition in the differentiated swinging earth detection signal yet.The trouble spot is not on this section circuit to be detected if the swinging earth fault appears in the locomotive electric apparatus circuit, and characteristic current flows through this section circuit, first detecting unit identical characteristic signal all occurs with second detecting unit, get after the difference and cancel out each other behind two signal subtractions, so also do not have the characteristic signal composition in the swinging earth detection signal.The trouble spot is on this section circuit to be detected if the swinging earth fault appears in the locomotive electric apparatus circuit, then first detecting unit has characteristic signal, second detecting unit does not have characteristic signal, or first detecting unit different with characteristic signal size, the direction of second detecting unit, get after the difference and can not cancel out each other behind two signal subtractions, so the characteristic signal composition can occur in the swinging earth detection signal.
Owing to except the feature pumping signal, also have very big working current (can reach hundreds of amperes on the numerical value on the circuit to be detected in the locomotive electric apparatus circuit to thousands of amperes, direct current, interchange even more complicated waveform are arranged) on the signal, and when the swinging earth fault occurring because the feature swinging earth signal that the feature pumping signal produces is very little, so detection of signal and analyze very important.In the present embodiment, ground signalling detecting device 12 (i.e. first detecting unit/second detecting unit) adopts antisaturation high-gain feature swinging earth signal detector.As shown in Figure 3, ground signalling detecting device 12 comprises the iron core (U-iron core) of a particular design, the fixed sturcture (for example spring shown in Fig. 4) that is wrapped in the coil on the iron core and the cable of circuit 10 to be detected is fixed on the core center position.To prevent that simultaneously very big working current from causing saturated for the gain that improves feature swinging earth signal (measuring-signal), adopted the U-iron core; Above-mentioned ground signalling detecting device 12 is firmly fixed at the center of ground signalling detecting device 12 by fixed sturcture all the time with detected circuit, prevents at the volley because the variation of detected circuit geometric position causes measuring error.
As shown in Figure 2, be the structural representation of an instantiation installing among Fig. 1.This device is made up of main frame, ground connection current signature detection device and pumping signal output line, and wherein ground connection current signature detection device is connected to main frame by the signal testing line.
Above-mentioned main frame is used to realize high speed acquisition, record and the analysis to locomotive electric apparatus circuit swinging earth fault-signal, accurately diagnose the particular location of swinging earth trouble spot, it specifically comprises host CPU (first processing unit), pumping signal generating unit, signal analysis unit, power supply unit, communication unit, input-output unit, alarm unit, reset unit, memory cell.
As shown in Figure 5, the pumping signal generating unit is made up of SG3525 chip, operational amplifier, metal-oxide-semiconductor, step-up transformer etc.Given an order to produce the feature pumping signal to metal-oxide-semiconductor 3 by host CPU, described feature pumping signal is selected frequency square-wave signal.
As shown in Figure 6, signal analysis unit is by from CPU (DSP, second processing unit), composition such as high-speed synchronous A/D converter, operational amplifier, bandpass filter able to programme, wave filter, rectifier, attenuator, standard reference signal, photoisolator, and from ground signalling detector acquisition swinging earth detection signal.
The detection principle of the swinging earth fault of signal analysis unit is described below in conjunction with example shown in Figure 3:
Pumping signal generating unit 11 sends the feature pumping signal to circuit 10 to be detected, and many windings earth signal detecting device 12 is through detected characteristics pumping signal on the different sections of major loop.Under the normal condition, owing to insulate between the device line of motor main circuit and the ground, insulation against ground resistance is infinitely great to several megohms, the voltage of feature pumping signal is stabilized in operating voltage, the swinging earth trigger pip keeps high level, and the ground signalling detecting device detects the feature swinging earth signal that produces less than the saltus step of feature pumping signal.
If the circuit of equipment under test has the swinging earth fault to occur, insulation against ground resistance moment drops to several kilohms even lower by several megohms, feature pumping signal moment has an electric voltage dropping, feature pumping signal and standard reference signal are sent into comparer, the record of comparator output signal waveform and real time data analysis result can be used as the trigger pip (first criterion) of swinging earth fault, determine that tentatively the swinging earth fault appears in the locomotive electric apparatus circuit.Simultaneously, because locomotive electric apparatus line-to-ground insulation resistance moment drops to several kilohms even lower by several megohms, between the circuit of equipment under test and ground, will have and meet feature swinging earth electric currents characteristic frequency, that size of current is different and flow through, antisaturation high-gain ground signalling detecting device can detect feature swinging earth current signal, and this signal is a transient signal.Signal analysis unit high speed acquisition record swinging earth trigger pip and multichannel swinging earth detection signal, and described swinging earth detection signal and swinging earth trigger pip carried out analyzing and processing with the Digital Signal Analysis method, extract swinging earth fault signature signal, to diagnose out circuit to be detected the swinging earth fault whether to occur and the particular location of swinging earth fault to occur.The Digital Signal Analysis result of swinging earth detection signal can be used as second criterion of locomotive electric apparatus circuit swinging earth fault, further determines the swinging earth fault.
When detecting, the feature pumping signal that 13 pairs of signal analysis units output to circuit to be detected detects, this feature pumping signal is after rectification, filtering, decay, together send into comparer with the standard reference signal and compare, comparator output signal is sent into after the high-speed synchronous A/D converter becomes digital signal from CPU (DSP) as the swinging earth false trigger signals.Under the normal condition, line-to-ground insulation resistance to be detected is bigger, and voltage is that the square wave feature pumping signal of operating voltage is after rectification, filtering, decay and standard reference signal back comparer output high level relatively.In the moment that the swinging earth fault occurs, because insulation against ground resistance is less, the feature excitation signal voltage will diminish, after rectification, filtering, decay and standard reference signal back comparer output low level relatively.From CPU (DSP) control high-speed synchronous A/D converter high speed acquisition record swinging earth trigger pip and multichannel swinging earth detection signal, and described swinging earth detection signal and swinging earth trigger pip carried out analyzing and processing with the Digital Signal Analysis method, extract swinging earth fault signature signal, diagnosing out circuit to be detected the swinging earth fault whether to occur, and the output unit by main frame and alarm unit show and report to the police at once; To respectively 1 second, a plurality of swinging earth detection signals and swinging earth trigger pip write down storage before and after triggering constantly, the swinging earth fault is analyzed simultaneously for the professional.
Owing to there is very big working current to exist on the circuit of detected equipment simultaneously, can reach hundreds of amperes on the numerical value to thousands of amperes, direct current, interchange even more complicated waveform are arranged on the signal, and the feature pumping signal is very little, so also contains the undesired signal of a large amount of various frequencies in the ground signalling detecting device 12 detected signals except that containing feature swinging earth signal.For avoiding co-channel interference, need before swinging earth is detected undesired signal in the first detection line, undesired signal is carried out Digital Signal Analysis, in pumping signal generating unit operating frequency range, find out the less relatively frequency of undesired signal and with this as working frequency points.Particularly, host CPU sends frequency 1 gating order to 6 bandpass filter able to programme, detect the undesired signal of frequency 1, signal carries out Digital Signal Analysis through amplification, filtering after the high-speed synchronous A/D converter is sent into from CPU (DSP) after becoming digital signal, calculates the size of the undesired signal of frequency 1.Host CPU repeats said process, calculates the size of undesired signal in the whole operating frequency range successively, and finds out the frequency of undesired signal minimum in the whole frequency of operation interval, with the frequency of operation of this frequency as the feature pumping signal.
As shown in Figure 9, be the process flow diagram that the present invention is based on the locomotive swinging earth failure logging analytic record analytical approach embodiment of high-speed signal acquisition, this method specifically may further comprise the steps:
Step S91: the output characteristic pumping signal is to the circuit to be detected of locomotive electric apparatus circuit.The frequency of feature pumping signal is chosen as the frequency of undesired signal minimum in the frequency of operation interval.
Step S92: detect the feature swinging earth signal on the circuit to be detected.Use the many windings earth signal detecting device on a plurality of sections that are installed on test line respectively to detect in the present embodiment, wherein every winding earth signal detecting device comprises two detecting units.These two detecting signal units are installed with the entrance and exit of tested section respectively and are oppositely installed, and its output signal series connection back is as the swinging earth detection signal of this section circuit.
Step S93: the detected signal of ground signalling detecting device is analyzed with diagnosis locomotive electric appliance circuits whether have the swinging earth fault.When diagnosing, at first use comparer to compare through rectification, filtered feature pumping signal and standard reference signal, and the output signal of comparer is converted to digital signal as the swinging earth trigger pip, and moment takes place swinging earth, trigger pip becomes low level by high level.Signal analysis unit 13 continuous high-speed sampling swinging earth trigger pips and multichannel swinging earth detection signal (this swinging earth detection signal through amplification, filtering after the high-speed synchronous A/D converter becomes digital signal).When trigger pip is low level, preliminary judgement has the swinging earth fault to occur, simultaneously described swinging earth detection signal and swinging earth trigger pip are carried out analyzing and processing with the Digital Signal Analysis method, extract swinging earth fault signature signal, to diagnose out circuit to be detected the swinging earth fault whether to occur and to determine to occur the particular location of swinging earth fault.To respectively 1 second, a plurality of locomotive electric apparatus circuit swinging earth detection signal and swinging earth trigger pip write down storage before and after triggering constantly, the swinging earth fault is analyzed simultaneously for the professional.
In said method, can adopt multichannel swinging earth detection signal and the one tunnel swinging earth trigger pip of two high-speed synchronous A/D converter high-speed sampling from many windings earth signal detecting device, and described swinging earth detection signal and swinging earth trigger pip carried out analyzing and processing with the Digital Signal Analysis method, extract swinging earth fault signature signal, the swinging earth fault whether occurs to diagnose out circuit to be detected.Show at once during earth fault and report to the police in the diagnosis life of setting out; Simultaneously to respectively 1 second, a plurality of swinging earth detection signals and swinging earth trigger pip write down storage before and after triggering constantly.
The above-mentioned swinging earth fault that can accurately and easily diagnose out the locomotive electric cad system circuit in the continuous motion based on the locomotive swinging earth failure logging analytical equipment and the method for high-speed signal acquisition, can diagnose the particular location that the swinging earth fault occurs exactly, instruct the locomotive crew member in time to take measures, prevent the traffic safety accident.In addition, said apparatus and method also can be noted the locomotive electric apparatus circuit and swinging earth instant of failure swinging earth signal and trigger pip waveform occur, for the analysis expert diagnosis, instruct the maintenance job of equipment.
Compare with traditional method, the present invention has tangible advantage:
(1) visual in image.Adopt the high-speed synchronous Sampling techniques directly to write down each branch road swinging earth fault detection signal waveform and trigger pip waveform, and on locomotive swinging earth failure logging analytical equipment, swinging earth signal waveform and trigger pip waveform are shown based on high-speed signal acquisition, be equivalent to do " cardiogram " for each branch road insulation of locomotive major loop, and for to utilize various advanced persons' Digital Signal Analysis method that signal analysis is laid the foundation.
(2) input sensitivity.Adopt antisaturation high-gain ground signalling detecting device, can in very big working current, detect faint feature swinging earth signal.
(3) strong interference immunity.(a) adopt the undesired signal frequency-scan technique, dynamically detected the frequency spectrum of undesired signal, determined the frequency of feature pumping signal based on this, avoided co-channel interference effectively.(b) adopt bandpass filter able to programme on the hardware, reduced the influence of undesired signal to greatest extent.(c) adopt the Digital Signal Analysis technology on the software, extracted feature swinging earth signal exactly.
(4) the feature exciting signal frequency is accurate.Directly control the metal-oxide-semiconductor switch by CPU and produce square-wave signal, feature exciting signal frequency deviation is minimum.
(5) diagnosis is accurate, and swinging earth fault misdescription rate and rate of failing to report are low.Owing to adopt above-mentioned a series of software and hardware technologies and Digital Signal Analysis treatment technology, guaranteed the accuracy of locomotive electric apparatus circuit swinging earth fault detect.
The present invention can be applicable to the diesel locomotive of railway, the swinging earth fault analysis and diagnosis and the maintenance of electric locomotive electric appliance circuits, also can be used for large-scale important the sports equipment swinging earth fault analysis and diagnosis and the maintenance such as tank, naval vessels of automobile, boats and ships and military field.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition is characterized in that, comprising:
The pumping signal generating unit is used for the to be detected circuit of output characteristic pumping signal to locomotive;
The ground signalling detecting device is used to detect the feature swinging earth signal on the described circuit to be detected;
Signal analysis unit is used for the swinging earth detection signal of described ground signalling detecting device output is carried out high speed acquisition and record, and whether has locomotive electric apparatus circuit swinging earth fault with the Digital Signal Analysis methods analyst with diagnosis.
2. the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition according to claim 1, it is characterized in that, described ground signalling detecting device comprises the entrance point that is fixedly mounted on circuit to be detected respectively and first detecting unit and second detecting unit of endpiece, and described first detecting unit is oppositely installed parallel-series with second detecting unit and is connected.
3. the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition according to claim 2, it is characterized in that the fixed sturcture that each in described first detecting unit and second detecting unit comprises an iron core, is wrapped in the coil on the described iron core and cable is fixed on described core center position.
4. the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition according to claim 1, it is characterized in that, also comprise first processing unit, the frequency of frequency undesired signal minimum that is used for selecting to output to the locomotive circuit according to the feedback of signal analysis unit is as the frequency of the feature pumping signal of described pumping signal generating unit output, and described feature pumping signal is selected frequency square-wave signal.
5. the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition according to claim 1, it is characterized in that, described device comprises a plurality of ground signalling detecting devices at the circuit different to be detected place that is installed in locomotive respectively, and each ground signalling detecting device comprises the entrance point that is fixedly mounted on circuit to be detected respectively and first detecting unit and second detecting unit of endpiece.
6. the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition according to claim 1, it is characterized in that, described signal analysis unit comprises second processing unit, operational amplifier, bandpass filter able to programme, the high-speed synchronous A/D converter, rectifier, wave filter, attenuator circuit, the standard reference signal generator, rectifier wherein, wave filter, attenuator circuit connects successively and the input end of described rectifier is connected to the output terminal of pumping signal generating unit, two input ends of described comparer are connected respectively to the output terminal of attenuator circuit and standard reference signal generator and to high-speed synchronous A/D converter output trigger pip, to high-speed synchronous A/D converter output characteristic swinging earth signal, the output terminal of described high-speed synchronous A/D converter is connected to second processing unit to described ground signalling detecting device via operational amplifier and bandpass filter able to programme.
7. the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition according to claim 6, it is characterized in that, described second processing unit high speed acquisition record swinging earth trigger pip and multichannel swinging earth detection signal, and described swinging earth detection signal and swinging earth trigger pip carried out analyzing and processing with the Digital Signal Analysis method, extract swinging earth fault signature signal, the swinging earth fault whether occurs to diagnose out circuit to be detected.
8. the locomotive swinging earth failure logging analytical equipment based on high-speed signal acquisition according to claim 7, it is characterized in that, also comprise storage unit, a plurality of swinging earth detection signals in each 1 second and the waveform of swinging earth trigger pip stored described storage unit into before and after described second processing unit will trigger constantly when life earth fault is set out in diagnosis.
9. the locomotive swinging earth failure logging analytical approach based on high-speed signal acquisition is characterized in that, may further comprise the steps:
(a) the output characteristic pumping signal is to the circuit to be detected of locomotive;
(b) the feature swinging earth signal on the described circuit to be detected of detection;
(c) the detected signal of described ground signalling detecting device is carried out high speed acquisition and record, and whether have locomotive electric apparatus circuit swinging earth fault with diagnosis with the Digital Signal Analysis methods analyst.
10. the locomotive swinging earth failure logging analytical approach based on high-speed signal acquisition according to claim 9 is characterized in that described step (c) comprising:
(c1) use comparer to compare, and comparative result is converted to digital signal as the swinging earth trigger pip through rectification, filtered feature pumping signal and standard reference signal;
(c2) high-speed sampling multichannel swinging earth detection signal and swinging earth trigger pip;
(c3) described swinging earth detection signal and swinging earth trigger pip are carried out analyzing and processing with the Digital Signal Analysis method, extract swinging earth fault signature signal, the swinging earth fault whether occurs to diagnose out circuit to be detected;
(c4) intactly note the swinging earth fault occur before and after each one second swinging earth detection signal and the waveform of swinging earth trigger pip.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675552A (en) * | 2013-12-23 | 2014-03-26 | 北京交大思诺科技有限公司 | Testing system and method for interference resistance of cab signaling equipment |
| CN105865815A (en) * | 2016-03-28 | 2016-08-17 | 中车青岛四方车辆研究所有限公司 | System and method for detecting brake testing stand terminal of motor train unit |
| CN109203995A (en) * | 2018-07-10 | 2019-01-15 | 中南大学 | A kind of trailer system major loop ground fault diagnosis method and system |
| CN109696902A (en) * | 2018-12-06 | 2019-04-30 | 奇瑞汽车股份有限公司 | A kind of signal recording apparatus, fault point detection circuit and method |
| CN110033853A (en) * | 2019-05-28 | 2019-07-19 | 中国人民解放军陆军工程大学 | Monitoring equipment |
| CN111896796A (en) * | 2020-08-03 | 2020-11-06 | 珠海格力电器股份有限公司 | Current oscillation detection device and method of PFC circuit and power supply system |
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2009
- 2009-09-15 CN CN200910190082XA patent/CN101713807B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103675552A (en) * | 2013-12-23 | 2014-03-26 | 北京交大思诺科技有限公司 | Testing system and method for interference resistance of cab signaling equipment |
| CN103675552B (en) * | 2013-12-23 | 2016-09-14 | 北京交大思诺科技股份有限公司 | The test system and method for cab signaling equipment capacity of resisting disturbance |
| CN105865815A (en) * | 2016-03-28 | 2016-08-17 | 中车青岛四方车辆研究所有限公司 | System and method for detecting brake testing stand terminal of motor train unit |
| CN105865815B (en) * | 2016-03-28 | 2018-06-01 | 中车青岛四方车辆研究所有限公司 | EMU brake tester endpoint detection system and method |
| CN109203995A (en) * | 2018-07-10 | 2019-01-15 | 中南大学 | A kind of trailer system major loop ground fault diagnosis method and system |
| CN109696902A (en) * | 2018-12-06 | 2019-04-30 | 奇瑞汽车股份有限公司 | A kind of signal recording apparatus, fault point detection circuit and method |
| CN110033853A (en) * | 2019-05-28 | 2019-07-19 | 中国人民解放军陆军工程大学 | Monitoring equipment |
| CN110033853B (en) * | 2019-05-28 | 2023-11-03 | 中国人民解放军陆军工程大学 | Monitoring equipment |
| CN111896796A (en) * | 2020-08-03 | 2020-11-06 | 珠海格力电器股份有限公司 | Current oscillation detection device and method of PFC circuit and power supply system |
| CN111896796B (en) * | 2020-08-03 | 2021-07-20 | 珠海格力电器股份有限公司 | Current oscillation detection device and method of PFC circuit and power supply system |
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