CN1114747A - Method for regulating and correcting roll monitoring equipment using eddy current - Google Patents
Method for regulating and correcting roll monitoring equipment using eddy current Download PDFInfo
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- CN1114747A CN1114747A CN 94112216 CN94112216A CN1114747A CN 1114747 A CN1114747 A CN 1114747A CN 94112216 CN94112216 CN 94112216 CN 94112216 A CN94112216 A CN 94112216A CN 1114747 A CN1114747 A CN 1114747A
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- roll
- eddy current
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- monitoring equipment
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Abstract
The present invention relates to a method for regulating and correcting roll eddy-current monitoring equipment. Said method has a system consisting of artificial flaw test block, artificial flaw signal imitation generator nd computerized eddy current flaw detector. Artificial-flaw test block replacing sample roll is first corrected by the flaw detector to obtain a vector, and then the probe of said flaw diector is placed on the probe of the artificial flaw signal imitation generator so as to obtain a vector similar to the above-mentioned vector. The probe of the artificial flaw signal imitation generator is finally placed below the probe of roll eddy-current monitoring equipment to regulate the gain of the roll eddy-current monitoring equipment and envelope frequency of the artifical flaw signal imitation generator so as to make the crack or hardness differece channel of said monitoring equipment implement alarm so the initial sensitivity of said equipment is corrected.
Description
The method of regulating and correcting roll monitoring equipment using eddy current belongs to the calibration steps that detects metal surface quality instrument.
Roll is a main consumable tool during steel rolling is produced, and after using a period of time, its surface will crack and the hardness abnormity point, is removed as untimely reconditioning, will cause that body of roll large tracts of land peels off or cause roll breakage.In roll reconditioning process, use monitoring equipment using eddy current, roller surface quality to reconditioning is monitored, can effectively avoid roller surface to peel off or the generation of roll breakage accident, the key of making good use of the eddy current monitoring technology is the calibration of equipment initial sensitivity, the adjustment of eddy detecting instrument sensitivity is when instrument is started shooting, need a roll that has identical material and process conditions with detected roll, and according to examination criteria or technological requirement processing people industrial injury, in order to the initial sensitivity of calibration eddy current monitoring instrument.Because large-scale roller costs an arm and a leg, volume is big, Heavy Weight is difficult to operation again, cause the eddy current monitoring instrument only to make instrumental function and calibrate and do not do sensitivity calibration.Only detect the function that eddy current is hindered instrument as rolling up 375 to 387 pages " the automatic NDT detection systems of forged steel working roll " " metal digest " 81 year Dec the 14th, do not do the monitoring of its initial sensitivity.
The objective of the invention is to adopt the lab scale piece to carve people's industrial injury and replace " sample roller ",, the eddy current monitoring device on the sharpening machine is carried out the calibration of initial sensitivity by artificial wounding signal simulation for solving the shortcoming that above-mentioned adjustment eddy current monitoring instrument method exists.
Device of the present invention is made of the test block of people's industrial injury, computer eddy current flaw detec, artificial wounding signal analog generator three parts, hinder test block on the people and adopt the piece that peels off of same roll (material and process conditions are identical), surface quality intact (flawless, nothing surpass the difference of hardness that requires) part processes, downcut rim charge when also can be used on the roll manufacturing and process, the equivalent people industrial injury that is processed with standard code in the test block or sets (artificial groove a and tenia b etc.) according to technological requirement; The computer eddy current flaw detec is a manual scanning type instrument, will have enough detectabilities to the people's industrial injury in the test block, and has vector indication and memory function; Form as shown in Figure 1 frequently by generator, gating circuit, attenuator, output stage etc. by carrier-fequency generator, phase locking unit, phase shifter, modulator, square-wave generator, wound for artificial wounding signal analog generator.The frequency of operation of the computer eddy current flaw detec that adopts among the eddy current monitor on the frequency of operation of this artificial wounding signal analog generator and the grinding machine and the present invention is identical, the phase place of the signal of artificial wounding signal analog generator can change as Fig. 2 in 0 to 360 ° of scope continuously, and amplitude is adjustable as Fig. 3, and the signal envelope frequency is scalable also.
The method of regulating and correcting roll monitoring equipment using eddy current of the present invention, personnel selection industrial injury signal imitation generator after computer eddy current flaw detec personnel selection industrial injury test block calibration, can replace the initial sensitivity of the roll monitoring equipment using eddy current on " sample roller " calibration grinding machine.The initial sensitivity of adjustable roll monitoring equipment using eddy current; Can monitor roll (especially new equipment) monitoring equipment using eddy current and respectively check the duty of passage; Dynamic function that can static identification and detection equipment.
Drawings and Examples
The artificial wounding signal of Fig. 1 is intended the generator block diagram
1, carrier-fequency generator 2, phase locking unit 3, phase shifter
4, modulator 5, attenuator 6, output stage
7, square-wave generator 8, wound frequency generator 9, gating circuit
The artificial wounding signal analog generator of Fig. 2 signal phase variation diagram
The artificial wounding signal analog generator of Fig. 3 signal phase changes and amplitude can be changed the line map
The test block of Fig. 4 people's industrial injury
10, artificial groove 11, tenia
Fig. 5 eddy current flaw detec scanning head is to people's industrial injury test block scanning synoptic diagram
10, artificial groove 11, tenia 12, scanning head
The polar plot that Fig. 6 obtains on eddy current flaw detec
Fig. 7 eddy current flaw detec scanning head places the position view on the artificial wounding signal analog generator output probe
12, scanning head 13, artificial wounding signal simulate generator output probe
The polar plot that Fig. 8 obtains on eddy current flaw detec
The artificial wounding signal analog generator of Fig. 9 signal output probe places the position view under the roll eddy current monitor detection probe
13, artificial wounding signal analog generator output probe
14, roll eddy current monitor detection probe
Embodiment 1:
(1) at first with the rim charge workplace part of peeling off intact part of piece surface quality or new production roll of same roll, people's industrial injury of processing criterion regulation or technological requirement (artificial groove, hardness variation etc.) as shown in Figure 4.
(2) with the scanning head of computer eddy current flaw detec, in people's industrial injury test block of Fig. 4, scan, as shown in Figure 5, when sweep type probe process a or b, on the computer eddy current flaw detec, obtain a vector such as Fig. 6 as shown.
(3) scanning head of computer eddy current flaw detec is placed the signal output of artificial wounding signal analog generator pop one's head in really the allocation worker as shown in Figure 7.Simulate the attenuator and the phase shift knob of generator by mediator's industrial injury signal, make and obtain a vector indication similar on the computer eddy current flaw detec, as shown in Figure 8 with Fig. 6.
(4) output of artificial wounding signal analog generator probe is placed under the on-the-spot roll eddy current monitoring instrument detection probe optimum position as shown in Figure 9, adjust the gain of roll eddy current monitoring instrument and the envelope frequency of artificial wounding signal analog generator, the crackle of roll eddy current monitoring instrument or difference of hardness passage are reported to the police.
(5) will place on the roll through the probe of the good roll eddy current monitoring instrument of adjustment and monitor, warning defective such as overproof defective, through continuing reconditioning when no longer reporting to the police, roll grinds, and has reached standard-required or technological requirement.
Embodiment 2:
With method of the present invention new roll monitoring equipment using eddy current function, performance are carried out identification and analysis:
Alignment step (1)～(3) are with (1) among the embodiment 1～(3)
(4) output of artificial wounding signal analog generator probe is placed under the detection probe of newly purchasing the roll eddy current monitoring instrument the best place of putting as shown in Figure 9, above-mentioned steps will be carried out respectively at different defectives, so that judge the detectability of new equipment to various defectives.
(5) on the basis of above-mentioned (1)～(4), the envelope frequency of mediator's industrial injury signal imitation generator so that identify the defective resolution characteristic of roll eddy current monitoring instrument, and is understood the accuracy requirement of breaker roll revolution change aspect.
Claims (4)
1, the method for regulating and correcting roll monitoring equipment using eddy current, with one with the roll of detected roll with material and process conditions, and process people's industrial injury thereon, initial sensitivity in order to calibration eddy current monitor, technical characterictic of the present invention is, the system that forms by the test block of people's industrial injury, artificial wounding signal analog generator, computer eddy current flaw detec, with the computer eddy current flaw detec to people's industrial injury test block calibrate, obtain a vector; Scanning head with the computer eddy current flaw detec places on the output probe of artificial wounding signal analog generator again, by adjusting the attenuator that artificial wounding signal simulates generator, make the computer eddy current flaw detec obtain one to the computer eddy current flaw detec the similar vector of resultant vector when test block is calibrated to people's industrial injury; The output probe of artificial wounding signal analog generator is placed under the detection probe of roll eddy current monitor, adjust the gain of roll eddy current monitor and the envelope frequency of artificial wounding signal analog generator, the crackle or the difference of hardness passage of roll eddy current monitor are reported to the police, promptly aligned the initial sensitivity of roll eddy current monitor, to monitor through the probe breaker roll of the good roll eddy current monitor of adjustment, the defective that is above standard roll defect continues to report to the police, when continuation reconditioning roll was not extremely reported to the police, then reconditioning was good for roll.
2, the method for regulating and correcting roll monitoring equipment using eddy current according to claim 1, it is characterized in that, artificial wounding signal generator includes carrier-fequency generator, phase locking unit, phase shifter, modulator, attenuator, output stage, square-wave generator, wound generator, gating circuit frequently.
3, the method for regulating and correcting roll monitoring equipment using eddy current according to claim 2, it is characterized in that, the carrier frequency frequency of described artificial wounding signal generator is identical with the frequency of computer eddy current flaw detec, and it is phase-locked, the phase place of artificial wounding signal generator can change continuously at 0 °～360 °, amplitude is adjustable, and the envelope frequency of output signal is adjustable.
4, the method for regulating and correcting roll monitoring equipment using eddy current according to claim 1 is characterized in that the peel off piece of people's industrial injury test block with detected roll, or is processed into the leftover pieces of detected roll in manufacture process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94112216 CN1042671C (en) | 1994-07-05 | 1994-07-05 | Method for regulating and correcting roll monitoring equipment using eddy current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94112216 CN1042671C (en) | 1994-07-05 | 1994-07-05 | Method for regulating and correcting roll monitoring equipment using eddy current |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1114747A true CN1114747A (en) | 1996-01-10 |
| CN1042671C CN1042671C (en) | 1999-03-24 |
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ID=5036009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94112216 Expired - Fee Related CN1042671C (en) | 1994-07-05 | 1994-07-05 | Method for regulating and correcting roll monitoring equipment using eddy current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1042671C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999000665A1 (en) * | 1997-06-26 | 1999-01-07 | Baoshan Iron And Steel Corporation | Analogue eddy detecting apparatus and method for calibrating the same |
| 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 |
-
1994
- 1994-07-05 CN CN 94112216 patent/CN1042671C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999000665A1 (en) * | 1997-06-26 | 1999-01-07 | Baoshan Iron And Steel Corporation | Analogue eddy detecting apparatus and method for calibrating the same |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1042671C (en) | 1999-03-24 |
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| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD Free format text: FORMER NAME OR ADDRESS: BAOSHAN STEEL GROUP IRON AND STEEL CO LTD Owner name: BAOSHAN IRON & STEEL CO., LTD. Free format text: FORMER NAME OR ADDRESS: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD |
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| CP03 | Change of name, title or address |
Address after: Orchard, Fujin Road, Baoshan District, Shanghai Patentee after: BAOSHAN IRON & STEEL Co.,Ltd. Address before: No. 370 Pu circuit, Shanghai, Pudong New Area Patentee before: BAOSHAN IRON & STEEL CO.,LTD. Address after: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Patentee after: BAOSHAN IRON & STEEL CO.,LTD. Address before: 201900 No. 1, Middle Road, Baoshan District, Shanghai Patentee before: Baosteel Group Corporation |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19990324 Termination date: 20130705 |