CN1299053A - Multi-frequency multi-channel roller eddy detecting instrument - Google Patents
Multi-frequency multi-channel roller eddy detecting instrument Download PDFInfo
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- CN1299053A CN1299053A CN 00127838 CN00127838A CN1299053A CN 1299053 A CN1299053 A CN 1299053A CN 00127838 CN00127838 CN 00127838 CN 00127838 A CN00127838 A CN 00127838A CN 1299053 A CN1299053 A CN 1299053A
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Abstract
A roller flaw vortex detector is composed a number of multifrequency channeles, and each channel contains wave shape generator, exciting circuit, detecting probe to produce input signal preamplifier circuit, phase sensitive detecting circuit, gain adjusting and balance treating circuit and filtering circuit connected in series. The output of the filtering circuit is connected to the computer and the output of the computer to alarm system and printer separately. The computer is also connected to the wave shape generator, the exciting circuits, the gain adjusting and banalce treating circuits and filtering circuits in all channels.
Description
The present invention relates to a kind of nondestructive examination detecting instrument, relate in particular to the eddy current test detector.
The main body instrument of existing roll eddy current defectoscope adopts analogue type single channel instrument formula, be divided into two filtering channels after the detection, back output taking alarm or coupled computer data processing equipment, this instrument for the various defectives of roller surface and disturbing factor as: the interference of crackle, soft spots and residual magnetism all involves is in the same place, the phase mutual interference is difficult to respectively, and it is relatively poor to detect effect.Chinese patent application CN1173639A discloses a kind of " roller vortex detecting device and adjusting process thereof ", the initial sensitivity calibrating installation of compositions such as the artificial wounding signal analog generator of this device employing is connected with the computer eddy current flaw detec, and it is that initial sensitivity calibration and actual detected are shared that this method adopts computer eddy current flaw detec.This Device Testing instrument main body comprises computer eddy current flaw detec, Modulation analysis circuit and warning circuit etc., adopt initial sensitivity calibration and the shared instrument of actual detected, reduced the error that human factor causes, improved measuring accuracy, but also exist the mutual interference of the various defective phase of roller surface and be difficult to separately the shortcoming that detection efficiency is lower.
The object of the present invention is to provide a kind of multi-frequency multi-channel roller eddy detecting instrument, this device is with various defectives of roller surface and disturbing factor, entering one's own passage respectively handles and stores, parameter regulation is flexible, operating personnel are easy to use, and can get rid of human factor, improve accuracy of detection and detection efficiency.
For achieving the above object, the technical solution of the present invention's proposition is:
A kind of multi-frequency multi-channel roller eddy detecting instrument, comprise detection probe, computing machine, warning system and printer, detector also comprises the multi-frequency multi-channel circuit, the multi-frequency multi-channel circuit is made up of a plurality of passages, each passage comprises waveform generator, exciting circuit, pre-amplification circuit, phase sensitive detection circuit, gain-adjusted and Balance Treatment circuit and filtering circuit, the waveform generator output signal connects exciting circuit, import pre-amplification circuit behind the exciting circuit serial connection detection probe input signal, pre-amplification circuit, phase sensitive detection circuit, gain-adjusted and Balance Treatment circuit and filtering circuit are connected in series one by one, filtering circuit output connects computing machine, computing machine output tap warning system and printer, computing machine tap waveform generator, exciting circuit, gain-adjusted and Balance Treatment circuit and filtering circuit.
According to above-mentioned multi-frequency multi-channel roller eddy detecting instrument, described multi-frequency multi-channel circuit is become with lower set of channels by two or two.
Principle of work of the present invention is that the driving source and the probe of multi-frequency multi-channel roller eddy detecting instrument input is that multi-frequency is worked simultaneously, a plurality of passages by detector, these a plurality of passages are separately according to frequency of operation of required selection, after various defectives were handled through the passage that is suitable for its characteristics, all detection information were exported to demonstration, control terminal by computer control and after handling--sound, light warning, mark and printing etc.Channel parameters in this detector is regulated and can be adopted computing machine separately to carry out, and each passage can select parameter, the parameter of adjusting to be stored and to be solidificated in the trace routine separately separately, the acceptant and easy operating of operator, thereby the quality that assurance detects.
Accompanying drawing is the electrical structure block diagram of multi-frequency multi-channel roller eddy detecting instrument of the present invention.
The invention will be further described below in conjunction with accompanying drawing.
Referring to accompanying drawing, a kind of multi-frequency multi-channel roller eddy detecting instrument, comprise detection probe 3, Computer 8, warning system 9 and printer 10, detector also comprises the multi-frequency multi-channel circuit, The multi-frequency multi-channel circuit is made up of a plurality of passages, and each passage comprises waveform generator 1, swashs Encourage circuit 2, pre-amplification circuit 4, phase sensitive detection circuit 5, gain-adjusted and Balance Treatment Circuit 6 and filter circuit 7, waveform generator 1 output signal connects exciting circuit 2, excitation electric Input pre-amplification circuit 4 behind 2 serial connection detection probe, 3 input signals of road, preposition amplification electricity Road 4, phase sensitive detection circuit 5, gain-adjusted and Balance Treatment circuit 6 and filter circuit 7 pursue One serial connection, filter circuit 7 outputs connect computer 8, computer 8 output tap warning systems 9 With printer 10, computer 8 tap waveform generators 1, exciting circuit 2, gain-adjusted And Balance Treatment circuit 6 and filter circuit 7. The multi-frequency multi-channel circuit by two or two with Upper channel forms.
Various flaw indications all carry out unique processing in sense channel separately, as: table The facial cleft line uses the detection frequency detecting of its best and can adjust filter circuit by computer 8 7 flaw indication low-frequency components reduce to minimum, and radio-frequency component is kept, and make Signal of Cracks Manifest more clearly; Soft spots then can reduce to minimum to radio-frequency component by filter circuit 7, And low-frequency component is kept, make the soft spots signal manifest more clearly; It is special that residual magnetism then uses Detect frequency (as about 30kHz) and detect, this detect frequency only responsive to residual magnetism and Insensitive to defective, and by farthest weakening detection signal after " territory " relevant treatment The residual magnetism of passage disturbs.
Embodiment:
The operator at first drives grinding machine, falls detection " slide block "; Then access the technical parameter of tested roll correspondence, promptly open a file of the same name; Put detector then in detected state, testing begins.Helical scan is done on probe beginning breaker roll surface, and detector begins image data, then reports to the police if surpass the defective of calibration equivalent value, and probe moves to roller end, and eddy current probe promotes automatically and gets back to rest position.
The testing roller: it is 300kHz that its crackle, soft spots detect frequency; Residual magnetism detects the 50kHz and " territory " the relevant treatment mode of use used; Magnetic test coil uses differential winding; Initial sensitivity is used default " curing " parameter, promptly opens a respective file and gets final product.
Detect backing roll: it is 300kHz that its crackle, soft spots and roller end work hardening detect frequency; Residual magnetism detects the 50kHz and " territory " the relevant treatment mode of use used; Magnetic test coil uses the differential absolute associating coil that adds; Initial sensitivity is used default " curing " parameter, promptly opens a respective file and gets final product.
Claims (2)
1. multi-frequency multi-channel roller eddy detecting instrument, comprise detection probe (3), computing machine (8), warning system (9) and printer (10), it is characterized in that described detector also comprises the multi-frequency multi-channel circuit, the multi-frequency multi-channel circuit is made up of a plurality of passages, each passage comprises waveform generator (1), exciting circuit (2), pre-amplification circuit (4), phase sensitive detection circuit (5), gain-adjusted and Balance Treatment circuit (6) and filtering circuit (7), waveform generator (1) output signal connects exciting circuit (2), import pre-amplification circuit (4) behind exciting circuit (2) serial connection detection probe (3) input signal, pre-amplification circuit (4), phase sensitive detection circuit (5), gain-adjusted and Balance Treatment circuit (6) and filtering circuit (7) are connected in series one by one, filtering circuit output connects computing machine (8), computing machine (8) output tap warning system (9) and printer (10), computing machine (8) tap waveform generator (1), exciting circuit (2), gain-adjusted and Balance Treatment circuit (6) and filtering circuit (7).
2. multi-frequency multi-channel roller eddy detecting instrument according to claim 1 is characterized in that described multi-frequency multi-channel circuit is become with lower set of channels by two or two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00127838 CN1128359C (en) | 2000-12-08 | 2000-12-08 | Multi-frequency multi-channel roller eddy detecting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00127838 CN1128359C (en) | 2000-12-08 | 2000-12-08 | Multi-frequency multi-channel roller eddy detecting instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1299053A true CN1299053A (en) | 2001-06-13 |
| CN1128359C CN1128359C (en) | 2003-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00127838 Expired - Fee Related CN1128359C (en) | 2000-12-08 | 2000-12-08 | Multi-frequency multi-channel roller eddy detecting instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN1128359C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427946C (en) * | 2005-01-31 | 2008-10-22 | 林俊明 | Method and device for rapid determining metal content in ore powder |
| CN100429515C (en) * | 2006-11-01 | 2008-10-29 | 浙江大学 | Eddy current inspection device based on resistance transducer of gigantic magnetism |
| CN101140263B (en) * | 2007-09-30 | 2010-10-13 | 浙江大学 | Electric transverse currents detecting sensor based on strong magnetic resistance and method thereof |
| CN101603947B (en) * | 2009-07-08 | 2012-03-28 | 中国人民解放军国防科学技术大学 | Integrated eddy-current nondestructive detection system |
| CN107884473A (en) * | 2017-10-26 | 2018-04-06 | 杨晓艳 | A kind of multi frequency detection system |
| CN110702783A (en) * | 2019-11-20 | 2020-01-17 | 天津市思维奇检测技术有限公司 | Array eddy current method for detecting thermal fatigue cracks of water-cooled wall tube |
| CN111458403A (en) * | 2020-03-31 | 2020-07-28 | 湖北工业大学 | Array eddy current detection method and system |
-
2000
- 2000-12-08 CN CN 00127838 patent/CN1128359C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427946C (en) * | 2005-01-31 | 2008-10-22 | 林俊明 | Method and device for rapid determining metal content in ore powder |
| CN100429515C (en) * | 2006-11-01 | 2008-10-29 | 浙江大学 | Eddy current inspection device based on resistance transducer of gigantic magnetism |
| CN101140263B (en) * | 2007-09-30 | 2010-10-13 | 浙江大学 | Electric transverse currents detecting sensor based on strong magnetic resistance and method thereof |
| CN101603947B (en) * | 2009-07-08 | 2012-03-28 | 中国人民解放军国防科学技术大学 | Integrated eddy-current nondestructive detection system |
| CN107884473A (en) * | 2017-10-26 | 2018-04-06 | 杨晓艳 | A kind of multi frequency detection system |
| CN110702783A (en) * | 2019-11-20 | 2020-01-17 | 天津市思维奇检测技术有限公司 | Array eddy current method for detecting thermal fatigue cracks of water-cooled wall tube |
| CN111458403A (en) * | 2020-03-31 | 2020-07-28 | 湖北工业大学 | Array eddy current detection method and system |
| CN111458403B (en) * | 2020-03-31 | 2021-06-08 | 湖北工业大学 | Array eddy current detection method and system |
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| Publication number | Publication date |
|---|---|
| CN1128359C (en) | 2003-11-19 |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031119 Termination date: 20131208 |