CN1299054A - Method and device for multi-frequency multi-channel detection of roller eddy - Google Patents
Method and device for multi-frequency multi-channel detection of roller eddy Download PDFInfo
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- CN1299054A CN1299054A CN 00127942 CN00127942A CN1299054A CN 1299054 A CN1299054 A CN 1299054A CN 00127942 CN00127942 CN 00127942 CN 00127942 A CN00127942 A CN 00127942A CN 1299054 A CN1299054 A CN 1299054A
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Abstract
A vortex detecting method and device for roll is so composed so as input and store the vector of the artificial flaw signal obtained through the calibrating probe and artificial flaw scan testing block to the detector of multichannel and multi frequency and to regulate the antificial flaw signal produced by artificial analogue calibration device coincide with the artificial signal vector and to input and store them to the channeles of detector of multichannel and multifrequency. Detecting the roller needs only picking up the stored document the same as the roll in the working conditions and the materials.
Description
The present invention relates to the device that a kind of nondestructive examination detected and implemented this method, the defective that relates in particular to the breaker roll surface is carried out the eddy current test detection.
Existing roller vortex detecting device mainly adopts online roll eddy current failure detector and contains the eddy-current crack detector of initial sensitivity prover.The former adopts conventional eddy current flaw detec pattern, can only carry out the function calibration, and the initial sensitivity calibration of failure detector must dynamically be carried out, and very high to operating personnel's technical requirement, it is very big that accuracy of detection is influenced by human factor.The latter adopts before the roll carrying out flaw detection and earlier device is carried out the initial sensitivity calibration.Chinese patent application CN1173639A discloses a kind of single channel detector " roller vortex detecting device and adjusting process thereof ", the initial sensitivity calibrating installation that analogue type circuit such as the artificial wounding signal analog generator of this device employing are formed is connected with the computer eddy current flaw detec, it is that initial sensitivity calibration and actual detected are shared that this method adopts the computer eddy current flaw detec, reduce the error that human factor causes, improved measuring accuracy.But this kind device adopts single channel equipment, and calibration is carried out in real time, and each start all will be calibrated, complicated operation and take the long period, and the various defective phase mutual interference of breaker roll surface also is difficult to better separately, and detection efficiency is lower.
The object of the present invention is to provide the device of a kind of multi-frequency multi-channel roller eddy detection method and this method of enforcement, this method and apparatus enters one's own passage respectively with detected roller surface defect and handles and store, device parameter is regulated flexibly, 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 detection method may further comprise the steps:
(1) with the verification scanning probe people industrial injury test block that is connected on the multi-frequency multi-channel roller eddy detecting instrument, obtains one and include artificial wounding signal vector, be stored in the multi-frequency multi-channel detector artificial wounding signal vector and called after A
11
(2) the multi-frequency multi-channel detector disconnects the verification probe and connects the analogue simulation calibrating installation, and the multi-frequency multi-channel detector accesses the artificial wounding signal vector A that is stored
11, and compare mediator's industrial injury analogue simulation signal and artificial wounding signal vector A with people's industrial injury analogue simulation signal from the analogue simulation calibrating installation
11Coincide storage people's industrial injury analogue simulation signal and called after B in multi-frequency multi-channel detector passage
11
(3) repeat (1), (2) step, obtain A after another person's industrial injury test block scanning to identical material
1jWith storage people industrial injury analogue simulation signal B in multi-frequency multi-channel detector passage
1j, wherein, j is a positive integer;
(4) the multi-frequency multi-channel detector is connected to the detection probe that is contained in the detection slide block, accesses the people's industrial injury analogue simulation signal data file B that is stored
1j, and the multi-frequency multi-channel detector is adjusted at detected state can carries out roller surface and detect.
According to above-mentioned multi-frequency multi-channel roller eddy detection method, described multi-frequency multi-channel detector by verification scanning probe various material the test block of various human industrial injury and store a plurality of artificial wounding signal vector A
1j, people's industrial injury analogue simulation signal of adjustment analogue simulation calibrating installation and artificial wounding signal vector A
IjCoincide, and be stored in the multi-frequency multi-channel detector passage, j people's industrial injury analogue simulation signal data file B of the i kind material of in multi-frequency multi-channel detector passage, being stored
IjForm database, according to the roll that need detect, the multi-frequency multi-channel detector calls the people's industrial injury analogue simulation signal data file B that is stored
IjCan carry out roller surface and detect, wherein i is a positive integer.
Implement the device of above-mentioned multi-frequency multi-channel roller eddy detection method, by computing machine, warning system and printer are formed, described device also comprises the multi-frequency multi-channel detector, the verification probe, the analogue simulation calibrating installation, detection probe and socket, the multi-frequency multi-channel detector is by socket and verification probe, the analogue simulation calibrating installation is connected with detection probe, the multi-frequency multi-channel detector comprises the multi-frequency multi-channel circuit of being made up of a plurality of passages, the analogue simulation calibrating installation is by phase-shift circuit, signal generator and modulation circuit are formed, and connect modulation circuit after phase-shift circuit and the signal generator parallel connection.
According to above-mentioned multi-frequency multi-channel roller eddy pick-up unit, described verification probe is identical with the detection probe parameter, and verification probe and detection probe are the probe that two differential probe coils are formed.
Principle of work of the present invention is the different people industrial injury test block that repeatedly scans identical material by the verification probe, obtains in a plurality of artificial wounding signal vector input multi-frequency multi-channel detector passages and storage.Adjust the analogue simulation calibrating installation and produce a plurality of people's industrial injury analogue simulation signals, and input multi-frequency multi-channel detector passage is interior and be stored, form people's industrial injury analogue simulation signal data library with corresponding artificial wounding signal vector coincides.
In actual roller surface detects, only need access data file identical with roll material and process conditions, that in the multi-frequency multi-channel detector, stored, and the multi-frequency multi-channel detector transferred to detected state, by the detection probe image data, after various defectives were handled through the passage that has own particular job frequency in the multi-frequency multi-channel detector, all detection information were exported to demonstration, control terminal by computer control and after handling---sound, light warning, mark and printing etc.
The present invention adopts computer control, and the channel parameters in the multi-frequency multi-channel detector can adopt computing machine to regulate respectively, and each passage can be selected parameter separately separately, and the parameter of adjusting is stored and is solidificated in the trace routine.Computing machine also can be controlled the phase-shift circuit and the signal generator of analogue simulation calibrating installation.Phase-shift circuit in the emulation calibrating installation is finished the analogue simulation to artificial wounding signal vector, signal generator is finished the modulation of breaker roll constant speed rotation people industrial injury, therefore people's industrial injury analogue simulation signal of emulation calibrating installation generation can satisfy the requirement of standard sample roller (being reference block), can replace the sample roller to the initial sensitivity calibration of multi-frequency multi-channel detector before detection.
Multi-frequency multi-channel roller eddy pick-up unit of the present invention has calibration accuracy height, defect resolution height, simple to operate and reliable and stable, and can get rid of operating personnel's human factor influence.
Accompanying drawing is a multi-frequency multi-channel roller eddy pick-up unit structural principle synoptic diagram of the present invention.
Provide embodiments of the invention below in conjunction with accompanying drawing.
The multi-frequency multi-channel roller eddy pick-up unit, comprise multi-frequency multi-channel detector 10, verification probe 2, analogue simulation calibrating installation 5, detection probe 8 and socket, control device is a computing machine, multi-frequency multi-channel detector 10 is output as warning system and printer 12, multi-frequency multi-channel detector 10 is by socket 1, socket 4 and socket 6 and verification probe 2, analogue simulation calibrating installation 5 is connected with detection probe 8, multi-frequency multi-channel detector 10 comprises the multi-frequency multi-channel circuit of being made up of a plurality of passages, analogue simulation calibrating installation 5 is by phase-shift circuit, signal generator and modulation circuit are formed, and connect modulation circuit after phase-shift circuit and the signal generator parallel connection.The material and the process conditions of people's industrial injury test block that analogue simulation calibrating installation 5 adopts are identical with tested roll, the demonstration speed of people's industrial injury was identical when people's industrial injury transfer rate was calibrated with " standard sample roller ", so the calibration effect of the calibration effect of analogue simulation calibrating installation and real " standard sample roller " is identical.Verification probe 2 is identical with detection probe 8 parameters, and verification probe 2 and detection probe 8 are the probe that two differential probe coils are formed.Detection probe 8 is contained in and detects in the slide block 7.In the accompanying drawings, 3 is the test block of people's industrial injury, and 9 is tested workpiece roll, and 11 is from detecting on-the-spot coded signal.
Running program is that technology is prepared part and production operation part.
One. technology is prepared part
(1) collects peeling off the leftover pieces that take off when piece and roll are produced and being processed into the little test block that has people's industrial injury of various rolls;
(2) multi-frequency multi-channel roller eddy detecting instrument 10 is connected with verification probe 2 by socket 1, and, obtains people's industrial injury signal phasor, be stored in the multi-frequency multi-channel detector 10 artificial wounding signal vector and called after A with the 2 scanning people industrial injury test blocks 3 of verification probe
11
(3) multi-frequency multi-channel detector 10 disconnects verification probe 2, and connects analogue simulation calibrating installation 5 by socket 4, and multi-frequency multi-channel detector 10 accesses the artificial wounding signal vector A that is stored
11, comparing with people's industrial injury analogue simulation signal (this signal flashes) from analogue simulation calibrating installation 5, amplitude, the phase place of mediator's industrial injury analogue simulation signal make the people's industrial injury analogue simulation signal and artificial wounding signal vector A that flash
11Coincide storage people's industrial injury analogue simulation signal and called after B in a passage of multi-frequency multi-channel detector 10
11
(4) repeat (2), (3) step, obtain A after another person's industrial injury test block 3 scannings to identical material
12With storage people industrial injury analogue simulation signal B12 in another passage of multi-frequency multi-channel detector 10; Repeatedly repeat (2), (3) step, can obtain a plurality of A the different people industrial injury test block 3 of identical material
13, B
13... A
1j, B
1jDifferent people industrial injury test block 3 to unlike material can obtain a plurality of A
21, B
21... A
Ij, B
Jj, wherein, i, j are positive integer; And with B
IjBe stored in the multi-frequency multi-channel detector passage;
(5) people's industrial injury analogue simulation signal B of last storage in multi-frequency multi-channel detector 10
Ij" warning gate " information that has also comprised multi-frequency multi-channel detector 10, and form database.
Two. the production operation part
(1) starts grinding machine.
(2) multi-frequency multi-channel detector 10 is connected to the detection probe 8 that is contained in the detection slide block 7, falls eddy current probe 8.
(3) roll 9 that detects according to need accesses the people's industrial injury analogue simulation signal data file B that is stored
Ij, and multi-frequency multi-channel detector 10 is adjusted at detected state can carries out roller surface and detect.
Calibration accuracy height of the present invention and time are short, declare and hinder accurately, and is lower to production operation personnel requirement, can reduce the stopping production accident that causes because of rolls damage, has bigger economic benefit.
Claims (4)
1. multi-frequency multi-channel roller eddy detection method is characterized in that may further comprise the steps:
(1) with the verification scanning probe people industrial injury test block that is connected on the multi-frequency multi-channel roller eddy detecting instrument, obtains one and include artificial wounding signal vector, be stored in the multi-frequency multi-channel detector artificial wounding signal vector and called after A
11
(2) the multi-frequency multi-channel detector disconnects the verification probe and connects the analogue simulation calibrating installation, and the multi-frequency multi-channel detector accesses the artificial wounding signal vector A that is stored
11, and compare mediator's industrial injury analogue simulation signal and artificial wounding signal vector A with people's industrial injury analogue simulation signal from the analogue simulation calibrating installation
11Coincide storage people's industrial injury analogue simulation signal and called after B in multi-frequency multi-channel detector passage
11
(3) repeat (1), (2) step, obtain A after another person's industrial injury test block scanning to identical material
1jWith storage people industrial injury analogue simulation signal B in multi-frequency multi-channel detector passage
1j, wherein, j is a positive integer;
(4) the multi-frequency multi-channel detector is connected to and is contained in the detection probe that detects in the slide block, accesses the people's industrial injury analogue simulation signal data file B that is stored
1j, and the multi-frequency multi-channel detector is adjusted at detected state can carries out roller surface and detect.
2. multi-frequency multi-channel roller eddy detection method according to claim 1, it is characterized in that the multi-frequency multi-channel detector by verification scanning probe various material the test block of various human industrial injury and store a plurality of artificial wounding signal vector A
Ij, people's industrial injury analogue simulation signal of adjustment analogue simulation calibrating installation and artificial wounding signal vector A
IjCoincide, and be stored in the multi-frequency multi-channel detector passage, j people's industrial injury analogue simulation signal data file B of the i kind material of in multi-frequency multi-channel detector passage, being stored
IjForm database, according to the roll that need detect, the multi-frequency multi-channel detector calls the people's industrial injury analogue simulation signal data file B that is stored
IjCan carry out roller surface and detect, wherein i is a positive integer.
3. implement the device of claim 1 or 2 described multi-frequency multi-channel roller eddy detection methods, by computing machine, warning system and printer are formed, it is characterized in that described device also comprises the multi-frequency multi-channel detector, the verification probe, the analogue simulation calibrating installation, detection probe and socket, the multi-frequency multi-channel detector is by socket and verification probe, the analogue simulation calibrating installation is connected with detection probe, the multi-frequency multi-channel detector comprises the multi-frequency multi-channel circuit of being made up of a plurality of passages, the analogue simulation calibrating installation is by phase-shift circuit, signal generator and modulation circuit are formed, and connect modulation circuit after phase-shift circuit and the signal generator parallel connection.
4. multi-frequency multi-channel roller eddy pick-up unit according to claim 3 is characterized in that the verification probe is identical with the detection probe parameter, and verification probe and detection probe are the probe that two differential probe coils are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00127942 CN1299054A (en) | 2000-12-19 | 2000-12-19 | Method and device for multi-frequency multi-channel detection of roller eddy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00127942 CN1299054A (en) | 2000-12-19 | 2000-12-19 | Method and device for multi-frequency multi-channel detection of roller eddy |
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| Publication Number | Publication Date |
|---|---|
| CN1299054A true CN1299054A (en) | 2001-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00127942 Pending CN1299054A (en) | 2000-12-19 | 2000-12-19 | Method and device for multi-frequency multi-channel detection of roller eddy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445493A (en) * | 2010-10-14 | 2012-05-09 | 中国人民解放军国防科学技术大学 | Modulation multifrequency eddy current testing method |
| CN109507281A (en) * | 2018-11-09 | 2019-03-22 | 上海金艺检测技术有限公司 | For roll eddy current and the sensitivity correction method of surface wave joint flaw detection |
-
2000
- 2000-12-19 CN CN 00127942 patent/CN1299054A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445493A (en) * | 2010-10-14 | 2012-05-09 | 中国人民解放军国防科学技术大学 | Modulation multifrequency eddy current testing method |
| CN102445493B (en) * | 2010-10-14 | 2014-04-16 | 中国人民解放军国防科学技术大学 | Modulation multifrequency eddy current testing method |
| CN109507281A (en) * | 2018-11-09 | 2019-03-22 | 上海金艺检测技术有限公司 | For roll eddy current and the sensitivity correction method of surface wave joint flaw detection |
| CN109507281B (en) * | 2018-11-09 | 2024-04-09 | 上海金艺检测技术有限公司 | Sensitivity calibration method for roller vortex and surface wave combined flaw detection |
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