CN102087328B - Wound product detection machine and detection method for interlayer short circuit thereof - Google Patents
Wound product detection machine and detection method for interlayer short circuit thereof Download PDFInfo
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- CN102087328B CN102087328B CN 200910247195 CN200910247195A CN102087328B CN 102087328 B CN102087328 B CN 102087328B CN 200910247195 CN200910247195 CN 200910247195 CN 200910247195 A CN200910247195 A CN 200910247195A CN 102087328 B CN102087328 B CN 102087328B
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Abstract
The present invention provides a wound product detection machine and a detection method for interlayer short circuit thereof, wherein the method comprises the steps as follows: high-voltage pulse electric power is input into two ends of a winding coil of a wound product; a voltage value of the winding coil in the electrifying process is captured to generate captured data; and specially, the detection method of the present invention can perform a time frequency conversion operation on the captured data to generate a time frequency analysis message, in order to show that whether an interlayer short circuit occurs in the winding coil.
Description
Technical field
The present invention relates to a kind of detection technique of layer short circuit, particularly relate to a kind of detection technique of layer short circuit for the coiling goods.
Background technology
Considerable coiling goods are arranged on the market, such as motor, transformer etc.In the manufacture process of these coil products, the phenomenon that its coiling has the scratch of enamel-cover film, broken skin, be full of cracks etc. unavoidably occurs.Yet, some use the higher assembly of voltage, such as high-voltage ignition coil, LCD phase inverter, isolation flyback DC-DC converter (Flyback converter) etc., often in use for some time, will produce spark discharge because insulation between enameled wire is not enough, even can cause burning of whole group of assembly.Therefore, how to detect whether winding coil layer short circuit occurs in the coiling goods, just become a very important technology.
In the prior art, although general LCR tester can be measured the electrical specification of assembly, yet because its test voltage is very low, layer short circuit phenomenon that at all can't magnetic test coil.In addition, general proof voltage test (HI-POT) is although machine can apply high pressure at the two ends of coil, and this kind method is that coil is treated as load, therefore can cause the problem of more damages.
In addition, when motor running, measure in real time the curtage signal of motor, (power decomposition technique) decomposites negative sequence electric current (negative sequencecurrent) with the Power Decomposition method, and calculate the uneven negative sequence electric current that causes by motor itself by theory, with behind its deduction, the residual electricity flow valuve is the reacting phenomenon that layer short circuit causes again.But this kind method namely can cause error on calculating and actual the measurement.
In view of this, a kind of detection technique of pulse resonance of utilizing just is developed.With present, come the winding coil of magnetic test coil goods whether layer short circuit occurs with pulse resonance, be acknowledged safety, the most reliable detection technique.Testing tool with present pulse resonance, it needs first to detect and is defined as winding the line normally the voltage signal of winding coil of goods when comparing group, and then measure the voltage signal of winding coil of other coiling goods, compare with the voltage signal of comparing group again, whether good with the winding coil of judging coiling goods to be detected.
Yet in the prior art, when equivalent measured the coiling product of generation problem, its voltage signal may be very little with the normal otherness that winds the line the voltage signal that product measured, even trickle in the naked eye all being difficult to resolution.Therefore, in the prior art, judge whether winding coil layer short circuit occurs, just need to have exper ienced testing staff to judge.In other words, prior art also can't universalness, and need to expend a large amount of manpowers and cost.In addition, because the difference of voltage signal may be very trickle, therefore in the process that large-tonnage product detects, skipped over possibly, and cause bad product by detecting.
Summary of the invention
Therefore, the invention provides a kind of detection board of the goods that wind the line, can utilize better simply system, just can be safely and detect reliably in the winding coil of coiling goods whether layer short circuit occurs.
In addition, the present invention also provides a kind of detection method of layer short circuit, can be under the condition that does not need control group, and judge exactly whether the winding coil of coiling goods layer short circuit occurs.
The invention provides a kind of detection board of the goods that wind the line, comprise pulse generation module, acquisition module and time frequency analysis module.The pulse generation module can couple the coiling goods, gives a high-voltage pulse electric power with the two ends of winding coil at the coiling goods.In addition, acquisition module then can capture in order to the mode with the voltage shunting magnitude of voltage of energising course in winding coil, and produces an acquisition data to the time frequency analysis module.By this, the time frequency analysis module just can be carried out acquisition data one time-frequency translation operation, and obtains a time frequency analysis information, with the winding coil that shows the coiling goods whether layer short circuit occurs.
Another viewpoint, the present invention also provides a kind of detection method of layer short circuit, and a high-voltage pulse electric power is inputted at the two ends that are included in the winding coil of coiling goods, and the magnitude of voltage of the energising course of acquisition winding coil, and produces an acquisition data.Specifically, detection method of the present invention can be carried out acquisition data one time-frequency translation operation, and produces a time frequency analysis information, to show whether winding coil layer short circuit occurs.
Owing to the present invention obtains time frequency analysis information by acquisition data is carried out the time-frequency translation operation, judge whether winding coil layer short circuit occurs.Therefore, the present invention does not need complex calculations and hardware cost, just can be safely and accurately the opposing connection wire work carry out the detection of layer short circuit.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and be described with reference to the accompanying drawings as follows.
The explanation of accompanying drawing formula
Fig. 1 shows the flow chart of steps according to the detection method of a kind of layer short circuit of a preferred embodiment of the present invention.
Fig. 2 shows the functional block diagram according to the detection board of a kind of goods that wind the line of one embodiment of the invention.
Fig. 3 shows the functional block diagram according to a kind of acquisition module of a preferred embodiment of the present invention.
Fig. 4 A and Fig. 4 B show respectively demonstration and layer short circuit do not occur and the distribution plan of the time frequency analysis information medium frequency of layer short circuit to the time occurs.
Fig. 5 shows the functional block diagram according to the detection board of a kind of goods that wind the line of another embodiment of the present invention.
Fig. 6 shows the synoptic diagram according to a kind of image processing information of one embodiment of the invention.
The reference numeral explanation
200,500: detect board
202: the pulse generation module
204: acquisition module
206: the time frequency analysis module
208: output module
220: the coiling goods
302: the voltage divided circuit
304: attenuator
306: the signal capturing card
502: the image analysing computer module
504: identification module
602,604: stain
AM: information warning
EX_DATA: acquisition data
IM_IFO: image processing information
TF_IFO: time frequency analysis information
V1, V2: voltage signal
S102, S104, S106: the steps flow chart of the detection method of layer short circuit
Embodiment
Because only the voltage signal that produces of the magnitude of voltage in the utilization test coil energising course judges that whether coil layer short circuit occurs is very difficult technology.Therefore, the present invention will launch time domain from the voltage signal that coil captured out, to judge by this coil whether layer short circuit occurs.And detailed narration will be shown with at the figure below in conjunction with correspondence clearly and introduce.
Fig. 1 shows the flow chart of steps according to the detection method of a kind of layer short circuit of a preferred embodiment of the present invention.Please refer to Fig. 1, detection method provided by the present invention can be useful in coiling goods, such as motor, transformer, generator etc.When wanting the opposing connection wire work to detect, then can be first as described in the step S102, input a high-voltage pulse electric power at the two ends of the winding coil of coiling goods and be used as detection voltage, and as described in the step S104, capture the magnitude of voltage of its energising course from winding coil, and produce an acquisition data.
Specifically, in the present embodiment, this acquisition data can be carried out a time-frequency translation operation, and produce a time frequency analysis information as described in the step S106, to show whether winding coil layer short circuit occurs.In the present embodiment, this time-frequency translation operation is such as being wavelet conversion computing, in short-term fourier transform computing, yellow blade of a sword method etc., and the present invention is not limited.
When winding coil is applied in high-voltage pulse, if layer short circuit occurs, then between coil, can produces the phenomenon of effluve, and be accompanied by the frequency spectrum generation of upper frequency.Therefore, utilize time-frequency analysis technology just can from the lower frequency values that occurs of recognition time point and energy size, judge whether winding coil layer short circuit occurs.In more detail, when winding coil is applied in high-voltage pulse, if layer short circuit does not occur winding coil, then on time-frequency figure, only can demonstrate the low period signal of rule energy, there is no the obvious high-energy place of concentrating and produce.Otherwise, if winding coil generation layer short circuit then on a special time point, just has the phenomenon of concentration of energy.Thus, anyone does not need the signal form that contrasts, just can utilize the time frequency analysis information in the present embodiment, and judge easily and accurately whether winding coil layer short circuit occurs.
Fig. 2 shows the functional block diagram according to the detection board of a kind of goods that wind the line of one embodiment of the invention.Please refer to Fig. 2, the detection board 200 that present embodiment provides comprises a pulse generation module 202, an acquisition module 204 and a time frequency analysis module 206.And in the embodiment of some selections, detect board 200 and can also dispose an output module 208.Wherein, pulse generation module 202 and acquisition module 204 can couple coiling goods 220 to be measured, and it is such as being motor, transformer, generator etc.In addition, time frequency analysis module 206 can couple acquisition module 204, and in certain embodiments, time frequency analysis module 206 can also couple output module 208.
Please continue with reference to Fig. 2, in the present embodiment, pulse generation module 202 is power equipments, and it can couple the two ends of the winding coil of coiling goods 220, in the winding coil that a high-voltage pulse electric power is inputed to coiling goods 220.Then, acquisition module 204 can capture the magnitude of voltage of energising course in the winding coil of coiling goods 220, and obtains an acquisition data EX_DATA.
Fig. 3 shows the functional block diagram according to a kind of acquisition module 204 of a preferred embodiment of the present invention.What pay special attention to is that the acquisition module 204 among Fig. 3 is an embodiment only, is not to limit the present invention.In addition, those skilled in the art should be known in that anyone replaces present embodiment by the circuit with other acquiring signal of the prior art, can not have influence on spirit of the present invention.
Please return with reference to Fig. 2, after acquisition module 204 produces acquisition data EX_DATA, it can be delivered to time frequency analysis module 206, to carry out a time-frequency translation operation.In the present embodiment, time frequency analysis module 206 can be carried out computing such as wavelet conversion computing, in short-term fourier transform computing and yellow blade of a sword method etc. to acquisition data EX_DATA, and produce a time frequency analysis information TF_IFO, to show whether winding coil layer short circuit occurs.
Fig. 4 A and Fig. 4 B show respectively demonstration and layer short circuit do not occur and the distribution plan of the time frequency analysis information medium frequency of layer short circuit to the time occurs.Please first with reference to Fig. 4 A, the time frequency analysis information shown in it is to obtain from normal winding coil.In the time frequency analysis information in Fig. 4 A, transverse axis representative be the time, its unit be second, and longitudinal axis representative is frequency, its unit is hertz (Hz).From Fig. 4 A, can find out, if winding coil does not have abnormal, then in time frequency analysis information, only can demonstrate the low period signal of rule energy, and without obviously high-energy concentrated place generation.
Otherwise, if layer short circuit occurs in winding coil, then because winding coil is applied in high-voltage pulse electric power, so can cause the phenomenon of effluve to occur.At this moment, be reflected in the time frequency analysis information, the phenomenon of concentration of energy will occur at certain time point.For example in Fig. 4 B, in about 8.6 seconds time point (being exactly circled next position among Fig. 4 B), the phenomenon that the meeting produce power is assembled.In other words, whether anyone can have the phenomenon of energy accumulating at special time point by observation, and does not need the technical ability of specialty, just can judge whether winding coil layer short circuit occurs.
Please return with reference to Fig. 2, in the present embodiment, the time frequency analysis information TF_IFO that time frequency analysis module 206 produces can also be sent to output module 208.Output module 208 can be a display apparatus module, loudspeaker, printer or similarly install, its time frequency analysis information TF_IFO that time frequency analysis module 206 can be exported shows, for example be presented on the screen of a display, judge for the testing staff.
Fig. 5 shows the functional block diagram according to the detection board of a kind of goods that wind the line of another embodiment of the present invention.Please refer to Fig. 5, detect board 500 most function squares, identical with the detection board 200 of Fig. 2, therefore much more no longer to give unnecessary details.Different is in detecting board 500, also to have disposed image analysing computer module 502 and identification module 504.Wherein, image analysing computer module 502 can couple time frequency analysis module 206, and identification module 504 then can couple image analysing computer module 502.And in certain embodiments, identification module 504 can also couple output module 208.
In the present embodiment, after time frequency analysis module 206 produces time frequency analysis information TF_IFO, it can be delivered to image analysing computer module 502.At this moment, image analysing computer module 502 just can be carried out image processing with time frequency analysis information TF_IFO, and produces an image processing information IM_IFO, as shown in Figure 6.
Fig. 6 shows the synoptic diagram according to the image processing information IM_IFO among a kind of Fig. 5 of one embodiment of the invention.Please merge with reference to Fig. 5 and Fig. 6, in the present embodiment, the frequency that image analysing computer module 502 can be shown with time frequency analysis information TF_IFO is carried out gridding to the distribution plan of time.In Fig. 6, the zone that noenergy is concentrated can present the bottom of white.Relatively, if winding coil generation layer short circuit then can the form with stain show in the zone of correspondence, for example stain 602 and 604.
After image analysing computer module 502 produces image processing information IM_IFO, it can be delivered to identification module 504 and identify.In the present embodiment, identification module 504 can carry out figure identification to image processing information IM_IFO.For example, the zone of white bottom can be read as the data of " 0 ", and the zone of stain then can be read as the data of " 1 ".In certain embodiments, identification module 504 can utilize computer system, and such as desktop PC, laptop computer, portable computer etc. realize, and can utilize neural network to learn to identify to affect process information IM_IFO.
In the embodiment of some selections, when among the identification module 504 judgement image processing information IM_IFO stain being arranged, then can export an information warning AM to output module 208.This information warning AM for example is a Word message, may be displayed on the screen of output module 208, or transmits a voice messaging to output module 208, and utilize loudspeaker to play back, to remind the testing staff.
In sum, because the present invention is shown to the information that the testing staff sees, be a time frequency analysis information.Therefore, anyone even if do not have special speciality, can not have in the situation of control group, and judges accurately whether network between genetic horizon of winding coil, so the present invention can promote the fiduciary level of detection effectively.On the other hand, the present invention carries out time frequency analysis with acquisition data, therefore do not need to expend too high hardware cost, or complex calculations too.
In addition, the present invention can also carry out image processing with time frequency analysis information, and image processing information is identified, and judges whether voluntarily to occur layer short circuit.Therefore, the present invention also can be applied to mass-produced field, and reduces the expenditure of human cost.
Although the present invention discloses as above with embodiment; so it is not to limit the present invention, those skilled in the art, under the premise without departing from the spirit and scope of the present invention; can do some changes and retouching, so protection scope of the present invention is as the criterion with claim of the present invention.
Claims (10)
1. coiling goods detect board, comprising:
One pulse generation module couples this coiling goods, gives a high-voltage pulse electric power with the two ends at the winding coil of these coiling goods;
One acquisition module couples this coiling goods, captures the magnitude of voltage of energising course in this winding coil in order to the mode with the voltage shunting, and produces an acquisition data; And
One time frequency analysis module couples this acquisition module, this acquisition data being carried out a time-frequency translation operation, and obtains a time frequency analysis information, and whether its winding coil that shows these coiling goods layer short circuit occurs.
2. detection board as claimed in claim 1 also comprises an output module, couples this time frequency analysis module, to export this time frequency analysis information.
3. detection board as claimed in claim 2, wherein this output module comprises a display.
4. detection board as claimed in claim 1 also comprises:
One image analysing computer module couples this time frequency analysis module, so that this time frequency analysis information is carried out image processing, and produces an image processing information; And
One identification module couples this image analysing computer module, identifying this image processing information, and judges according to this image processing information whether this winding coil layer short circuit occurs.
5. detection board as claimed in claim 1, wherein this acquisition module comprises:
One voltage divided circuit receives the voltage of shunting from this winding coil;
One attenuator couples this voltage divided circuit, so that the voltage of shunting is decayed; And
One signal capturing card couples this attenuator, in order to the voltage signal after the receiving attenuation, with the magnitude of voltage of acquisition energising course in winding coil.
6. detection board as claimed in claim 1, wherein these coiling goods comprise motor, generator and transformer.
7. the detection method of goods layer short circuit that winds the line be applicable to coiling goods, and this detection method comprises the following steps:
A high-voltage pulse electric power is inputted at two ends at the winding coil of these coiling goods;
Capture the magnitude of voltage of the energising course of this winding coil, and produce an acquisition data; And
This acquisition data is carried out a time-frequency translation operation, and produce a time frequency analysis information, to show this winding coil whether layer short circuit occurs.
8. detection method as claimed in claim 7 also comprises this time frequency analysis information of output.
9. detection method as claimed in claim 7 also comprises the following steps:
This time frequency analysis information is carried out image processing, and produce an image processing information;
Identify this image processing information, to judge this winding coil whether layer short circuit occurs; And
When judging this winding coil generation layer short circuit, then send a caution message.
10. detection method as claimed in claim 7, wherein this time-frequency translation operation comprises wavelet conversion computing, in short-term fourier transform computing and yellow blade of a sword method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910247195 CN102087328B (en) | 2009-12-02 | 2009-12-02 | Wound product detection machine and detection method for interlayer short circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910247195 CN102087328B (en) | 2009-12-02 | 2009-12-02 | Wound product detection machine and detection method for interlayer short circuit thereof |
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| CN102087328A CN102087328A (en) | 2011-06-08 |
| CN102087328B true CN102087328B (en) | 2013-01-23 |
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| CN109613388A (en) * | 2018-12-12 | 2019-04-12 | 润电能源科学技术有限公司 | A kind of transformer winding fault detection method and device |
| CN109613389A (en) * | 2018-12-12 | 2019-04-12 | 润电能源科学技术有限公司 | A kind of rotor windings earth-fault detecting method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184367A (en) * | 1996-11-30 | 1998-06-10 | 三星电子株式会社 | Winding machine having pinhole detection function |
| CN2910870Y (en) * | 2006-02-13 | 2007-06-13 | 金天平 | Automatic winding machine |
| CN201290012Y (en) * | 2008-09-16 | 2009-08-12 | 上海群英汽车电子有限公司 | Automatic charging device |
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2009
- 2009-12-02 CN CN 200910247195 patent/CN102087328B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184367A (en) * | 1996-11-30 | 1998-06-10 | 三星电子株式会社 | Winding machine having pinhole detection function |
| CN2910870Y (en) * | 2006-02-13 | 2007-06-13 | 金天平 | Automatic winding machine |
| CN201290012Y (en) * | 2008-09-16 | 2009-08-12 | 上海群英汽车电子有限公司 | Automatic charging device |
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