CN1042671C - 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
- Publication number
- CN1042671C CN1042671C CN 94112216 CN94112216A CN1042671C CN 1042671 C CN1042671 C CN 1042671C CN 94112216 CN94112216 CN 94112216 CN 94112216 A CN94112216 A CN 94112216A CN 1042671 C CN1042671 C CN 1042671C
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- roll
- eddy current
- generator
- artificial
- current monitor
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Abstract
The present invention relates to a method for correcting and calibrating a roll vortex flow monitoring device. A system is composed of an artificial flaw test block, an artificial flaw signal imitation generator and a computer vortex flow flaw detector, wherein the artificial flaw test block replaces a sample roll, and the computer vortex flow flaw detector is used for calibrating the artificial flaw test block to obtain a vector. Then, a probe of the computer vortex flow flaw detector is arranged on a probe of the artificial flaw signal imitation generator to obtain a vector which is the same as the vector. The probe of the artificial flaw signal imitation generator is arranged under a probe of the roll vortex flow monitoring device, the gain of the roll vortex flow monitoring device and the envelope frequency of the artificial flaw signal imitation generator are corrected, and the crack or the hardness difference channel of the roll vortex flow monitoring device is alarmed, namely that the initial sensitivity of the roll vortex flow monitoring device is corrected and calibrated.
Description
The method of regulating and correcting roll eddy current monitor 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 can 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 the roll eddy current monitor that the roller surface quality of 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 roll eddy current monitor is the calibration of roll eddy current monitor initial sensitivity, the adjustment of roll eddy current monitor sensitivity is when the instrument 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 roll eddy current monitor.Because large-scale roller costs an arm and a leg, volume is big, Heavy Weight is difficult to operation again, cause the roll eddy current monitor only to make instrumental function and calibrate and do not do sensitivity calibration.As rolling up the function that 375～387 pages " the automatic NDT detection system of forged steel working roll " regulation only detects the roll eddy current monitor " 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 monitor on the sharpening machine is carried out the calibration of initial sensitivity by artificial wounding signal simulation for solving the shortcoming that above-mentioned regulating and correcting roll eddy current monitor method exists.
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, the piece that peels off of same roll (material and process conditions are identical) is adopted in the test block of people's industrial injury, surface quality intact (flawless, nothing surpass the difference of hardness that requires) part processes the equivalent people industrial injury that is processed with standard code in the test block or sets according to technological requirement (artificial groove a and tenia b etc.); 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; Artificial wounding signal analog generator is made up of as shown in Figure 1 carrier-fequency generator 1, phase locking unit 2, phase shifter 3, modulator 4, attenuator 5, output stage 6, square-wave generator 7, gating circuit 8 and wound frequency generator 9.Carrier-fequency generator 1, phase locking unit 2, phase shifter 3 arrange device 4 and are connected in series one by one; Square-wave generator 7, wound generator 9 are frequently joined with gating circuit 8 respectively, and gating circuit 8 now connects with modulator 4, and modulator 4 joins with attenuator 5, and attenuator 5 joins with output stage 6.The frequency of operation of the circuit eddy current flaw detec that adopts among the eddy current monitor on the frequency of operation of this artificial wounding signal 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 ° scope continuously, and amplitude is adjustable as Fig. 3, and the signal envelope frequency is scalable also.
The method of regulating and correcting roll eddy current monitor of the present invention, personnel selection industrial injury signal imitation generator, after circuit eddy current flaw detec personnel selection industrial injury test block calibration, the initial sensitivity of the roll eddy current monitor on alternative " sample roller " calibration grinding machine; Can monitor roll (especially new equipment) eddy current monitor and respectively check the duty of passage; Can the static dynamic function of identifying the roll eddy current monitor.
Drawings and Examples
The artificial wounding signal analog generator of Fig. 1 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, gating circuit 9, wound frequency generator
The artificial wounding signal analog generator of Fig. 2 signal phase variation diagram
Fig. 3 artificial wounding signal analog generator phase change 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 computer 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 the computer eddy current flaw detec
Fig. 7 computer eddy current flaw detec scanning head places the position view on the artificial wounding signal analog generator output probe
The polar plot that Fig. 8 obtains on the computer 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 part of peeling off intact part of piece quality or new production roll of same roll, people's industrial injury of processing criterion regulation or technological requirement (artificial groove, hardness variation) 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 scanning head process a or b, on the computer eddy current flaw detec, obtain a vector as shown in Figure 6.
3, the 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 on the allocation, as shown in Figure 7.By the attenuator and the phase shift knob of mediator's industrial injury signal imitation generator, make and obtain a vector indication similar on the computer eddy current flaw detec, as shown in Figure 8 with Fig. 6.
4, the output of artificial wounding signal analog generator probe is placed under the detection probe of on-the-spot roll eddy current monitor the optimum position as shown in Figure 9, adjust the gain of roll eddy current monitor and the envelope frequency of people's industrial injury analog signal generator, make the crackle or the difference of hardness passage of roll eddy current monitor report to the police the initial sensitivity of the good roll eddy current monitor of i.e. adjustment.
5, place on the roll through the probe of the good roll eddy current monitor 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 the inventive method new roll eddy current monitor function, performance are carried out identification and analysis:
Alignment step 1 ,～3, with embodiment 11 ,～3.
4, the output probe with artificial wounding signal analog generator places optimum position under the monitoring probe of newly purchasing the roll eddy current monitor, and as shown in Figure 9, above-mentioned steps will be carried out respectively at different defectives, so that judge the detectability of new instrument to various defectives.
5, above-mentioned 1 ,～4, the envelope frequency of the artificial wounding signal analog generator of basic adjusted so that identify the defective resolution characteristic of roll eddy current monitor and understand the accuracy requirement of breaker roll revolution change aspect.
Claims (4)
1, the method for regulating and correcting roll eddy current monitor, 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 roll eddy current monitoring view, it is characterized in that, the system that forms by the test block of people's industrial injury, artificial wounding signal generator, computer eddy current flaw detec, with the computer eddy current flaw detec to people's industrial injury test block hold calibration, 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 of artificial wounding signal analog 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 defectoscope, 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 adjust the initial sensitivity of roll eddy current monitor, the probe breaker roll of the roll eddy current monitor that adjustment is good is monitored, 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 eddy current monitor according to claim 1 is characterized in that, artificial wounding signal generator is assembling like this, and carrier-fequency generator 1, phase locking unit 2, transposer 3, modulator 4 are connected in series one by one; Square-wave generator 7, wound generator 9 are frequently joined with gating circuit 8 respectively, and gating circuit 8 joins with modulator 4, and modulator 4 joins with attenuator 5, and attenuator 5 joins with output stage 6.
3, the method for regulating and correcting roll eddy current monitor 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 eddy current monitor according to claim 1 is characterized in that, the test block of people's industrial injury is with the piece that peels off of tested roll, or is processed into the leftover pieces of tested 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 CN1114747A (en) | 1996-01-10 |
| CN1042671C true CN1042671C (en) | 1999-03-24 |
Family
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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074546C (en) * | 1997-06-26 | 2001-11-07 | 宝山钢铁(集团)公司 | Roller vortex detecting device and its checkout method |
| 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 |
-
1994
- 1994-07-05 CN CN 94112216 patent/CN1042671C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1114747A (en) | 1996-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
|
| 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 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19990324 Termination date: 20130705 |