CN1076021A - With laser method on-line measurement tube wire diameter - Google Patents
With laser method on-line measurement tube wire diameter Download PDFInfo
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- CN1076021A CN1076021A CN 92101090 CN92101090A CN1076021A CN 1076021 A CN1076021 A CN 1076021A CN 92101090 CN92101090 CN 92101090 CN 92101090 A CN92101090 A CN 92101090A CN 1076021 A CN1076021 A CN 1076021A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005259 measurement Methods 0.000 title claims abstract description 13
- 238000009499 grossing Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
Laser method line measurement pipe of the present invention, gauge or diameter of wire belong to measuring technique, adopt the relative method principle metering of common condenser lens utilization measured object diameter, and promptly parallel grating scans testee and grating simultaneously, uses the grating measurement measured object.But the present invention's pre-set criteria value, deviate show measured value by charactron, have upper and lower limit to report to the police.This instrumentation is simple, and is directly perceived, has good stability and reliability, is applicable to cable, rubber tube, on-line measurement and finished product detection such as plastic tube.
Description
The invention belongs to measurement technology, relate in particular to laser beam flying the tube wire diameter is carried out on-line measurement.
Present domestic tube wire production industry mostly adopts the method for manual measurement diameter, and monitoring accuracy is low in this way, and information feedback is slow, the rejection rate height, and labor strength is big.
External US 4097.158 patents provide the technology of laser measurement diameter, be by object being scanned with a branch of parallel beam, when running into object, parallel beam is blocked, form and the proportional dark space of being in the light of measured object size, converted to electric signal after the photoelectric device reception, multiplying each other according to the speed and the time of being in the light of scanning to obtain the measured object diameter.And it is by getting half after the time-delay of full peak that half-peak detects, with the Quan Feng intersection as the half-peak Detection Point.Its advantage is, if sweep velocity is constant, full peak heights is equal substantially in the scanning process, just can obtain diameter value accurately.Shortcoming is to adopt special f θ scanning mirror and accurate Constant-Speed Unit, to guarantee sweep trace speed average rate.Also will guarantee does not simultaneously have the interference of parasitic light and laser instrument to have good stability, stable to guarantee peak value.Improved total cost like this.
The object of the present invention is to provide a kind of method of the diameter of tube wire being carried out online non-cpntact measurement with the laser beam flying principle.Advantage such as that the present invention has is easy to use, simple to operate, monitoring accuracy is high, and cost is low.
Technical characterictic of the present invention is that laser instrument sends light beam and obtains the parallel sweep light beam by scanning mirror, scanning lens, and this parallel beam is divided into two bundles by semi-transparent semi-reflecting lens: a branch ofly received by photelectric receiver A through testee, obtain surveying the thing signal; Another bundle is received by photelectric receiver B through grating, obtains grating signal.After respectively these two signals being carried out shaping and handle, obtain corresponding to the storbing gate signal of the dark space width that is in the light and corresponding to the counting pulse signal of grating pitch.The count pulse number that is detected by storbing gate is through just obtaining the diameter of measured object after calculating.The shaping of described survey thing signal is handled and have been adopted the RC circuit that the full peak of signal is kept and smoothing processing, and then carries out half-peak and detect, and obtains the storbing gate signal of standard.
Description of drawings:
Fig. 1 is a light path principle figure
Fig. 2 has signal is kept half-peak detecting circuit schematic diagram with smoothing effect
Fig. 3 is for surveying the thing signal principle figure
Fig. 4 for and have and keep and the relevant oscillogram of the half-peak detecting circuit of smoothing effect
Fig. 5 surveys thing signal and counting pulse signal oscillogram
[1] Laser Power Devices, [2] laser instrument, [3] beam expander, [4] total reflective mirror, [5] scanning mirror, [6] scanning lens, [7] semi-transparent semi-reflecting lens, [8] receiver lens A, [9] photelectric receiver A, [10] grating, [11] receiver lens B, [12] photelectric receiver B, [13] amplifier, [14] half-peak detector.
Describe by reference to the accompanying drawings technical solution of the present invention in detail:
The light beam that penetrates from laser instrument [2] passes through on beam expander [3], the rear scanning mirror [5] of beating in driven by motor of total reflective mirror [4], because the reflecting surface of scanning mirror [5] places on the focus of scanning lens [6], so its light beam is through the parallel scanning light beam of the rear formation of scanning lens [6], here, scanning lens is common focus lamp. Collimated light beam is divided into two-way after through semi-transparent semi-reflecting lens [7]: the one tunnel scans testee, causes the be in the light dark space corresponding with the measured object diameter. Receiver lens A[8] converge after, by photelectric receiver A[9] receive and survey the thing signal, another road is scanned metrological grating [10], through receiver lens B[11] converge after, by photelectric receiver B[12] receive and obtain grating signal.
Because the hot spot of scanning light beam all has physical dimension, thus be not all to block simultaneously when object is in the light, but the regular hour is arranged, this has just caused survey thing signal edge not steep.Have only when hot spot from geometric angle to be blocked the diameter that a half can react measured object really, detect as Fig. 3 so will carry out half-peak.In order to obtain the radius level, at first to determine full peak, here, adopted a kind of full peak to be kept and level and smooth way, rather than got certain a bit or artificially determine etc.
Photelectric receiver A[9] the survey thing signal that obtains at first passes through amplifier [13] and amplifies, enter full peak again and keep and smoothing circuit.Full peak keeps comprising RC circuit, operational amplifier and two-phase gate circuit with smoothing circuit.By the certain magnitude of voltage of amplifier L1 output, voltage swing is decided according to light intensity when light beam is not blocked, because the edge effect of light path and the interference of parasitic light, magnitude of voltage is also non-constant, waveform such as Fig. 4 (a).This voltage discharges and recharges for the RC circuit through operational amplifier L1 and two-phase door L2, suitably select the RC value to make the positive terminal of operational amplifier L3 have a magnitude of voltage of following L1 output and change the voltage that is not subjected to little interference again, its 1 two-phase door is controlled by operational amplifier L1, two-phase is open-minded to the L2 door when L1 output high level, two-phase door L2 ends during low level, can guarantee that so obtained full peak is effectively preserved, as Fig. 4 (b), keep and level and smooth after full peak send into the storbing gate that half-peak detector [14] and original waveform Fig. 4 (a) more just detect standard, as accompanying drawing 4.
Photelectric receiver B[12] grating signal that obtains through filtering amplification and process of frequency multiplication after, just can obtain the counting pulse signal of standard.
Behind the counting pulse signal that detects by the storbing gate signal through rolling counters forward, again through just obtaining the diameter of testee after the computing.
The present invention has following advantage:
1. the present invention scans testee and metrological grating simultaneously owing to having adopted by a branch of directional light, therefore, can eliminate effectively because the systematic error that motor speed is unstable and each factor is brought.
2. replace f θ lens as scanning lens with common condenser lens, cost is reduced greatly.
3. it is unstable and the influence to measuring that causes has improved accuracy and stability that the method that adopts level and smooth back half-peak to detect has been eliminated parasitic light and laser power.
4. the present invention can carry out the noncontact on-line measurement to the diameter of tube wire, and is simple to operate, reliable.The present invention not only can increase work efficiency, the rate of reducing the number of rejects and seconds, but also can save great deal of raw materials, has bigger economic benefit.
Embodiment:
The JQ-50 type laser diameter measuring instrument of now having developed, measurement range is at 0.1～50mm.The focal length of scanning lens is 400mm, clear aperture is 60mm, semi-transparent semi-reflecting lens is wide to be 20mm, and height is 60mm, and the grating scale is 5/mm, the receiver lens focal length is 30mm, clear aperture 60mm, the enlargement factor of beam expander is 5 times, the wide 20mm of total reflective mirror, high 80mm, scanning mirror is 18 bodies, and rotating speed is 400 rev/mins, and photelectric receiver is the PIN photoelectric tube, its sensitive volume is at 9000A, receiving area is φ 4mm, and the R value is 1K, and the C value is 1uF etc., operational amplifier adopts LM318, and the two-phase door adopts 4066.
Claims (3)
1, a kind of method with laser on-line measurement tube wire diameter, send light beam through scanning mirror [5] by laser instrument [2], scanning lens [6] obtains the parallel sweep light beam, it is characterized in that: parallel beam is divided into two bundles by semi-transparent semi-reflecting lens [7], a branch of process testee is received by photelectric receiver A, obtain surveying the thing signal, another bundle process grating is by photelectric receiver B[12] receive, obtain grating signal, respectively two signals are handled through shaping and obtained storbing gate signal corresponding and the count pulse corresponding with grating pitch with the measured object diameter, detect the number of count pulse by the storbing gate signal, just obtain the diameter value of measured object.
2, method according to claim 1 is characterized in that the RC circuit has been adopted in the shaping processing of said storbing gate signal, and the full peak of surveying the thing signal is kept and smoothing processing, carries out half-peak again and detects, and obtains the storbing gate signal of standard.
3, method according to claim 1 is characterized in that said scanning lens [6] can adopt common condenser lens.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92101090 CN1027921C (en) | 1992-02-27 | 1992-02-27 | On-line diameter measurement of pipes and wires by laser method |
| JP3075793A JPH06160033A (en) | 1992-02-27 | 1993-02-19 | Measuring method of diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92101090 CN1027921C (en) | 1992-02-27 | 1992-02-27 | On-line diameter measurement of pipes and wires by laser method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1076021A true CN1076021A (en) | 1993-09-08 |
| CN1027921C CN1027921C (en) | 1995-03-15 |
Family
ID=4938961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92101090 Expired - Fee Related CN1027921C (en) | 1992-02-27 | 1992-02-27 | On-line diameter measurement of pipes and wires by laser method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH06160033A (en) |
| CN (1) | CN1027921C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386594C (en) * | 2004-04-07 | 2008-05-07 | 华南理工大学 | Non-contact measuring method and system for thickness and width |
| CN100588502C (en) * | 2008-05-28 | 2010-02-10 | 上海宝业机电科技有限公司 | Process for automatically measuring diameter of steel tube |
| CN102087100A (en) * | 2010-11-23 | 2011-06-08 | 东莞市日新传导科技股份有限公司 | FPGA (Field Programmable Gate Array) based laser diameter measuring method |
| CN102160690A (en) * | 2011-01-17 | 2011-08-24 | 大树智能科技(南京)有限公司 | Online detection and control method and device of periphery of filtering rod |
| CN102680366A (en) * | 2012-06-01 | 2012-09-19 | 苏州大学 | Electronic detecting method for raw milk nodes and device thereof |
| CN103212829A (en) * | 2012-01-19 | 2013-07-24 | 昆山思拓机器有限公司 | Method for monitoring tube diameter change of medical stent |
| CN103217097A (en) * | 2012-01-19 | 2013-07-24 | 昆山思拓机器有限公司 | Thin-wall tube detection system |
| CN103542813A (en) * | 2013-07-05 | 2014-01-29 | 中国计量学院 | Laser diameter measuring instrument based on boundary differential and environmental light self-calibration |
| CN104034273A (en) * | 2014-06-23 | 2014-09-10 | 苏州经贸职业技术学院 | Device and method for measuring and monitoring wire diameters of copper-clad steel on basis of technology of internet of things |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524932A (en) * | 2016-12-29 | 2017-03-22 | 合肥工业大学 | Symmetrical optical bridge type self-stabilizing laser diameter measurement system, and calibration method and measurement method thereof |
| JP6974973B2 (en) * | 2017-07-27 | 2021-12-01 | キヤノン電子株式会社 | Optical scanning measuring device |
-
1992
- 1992-02-27 CN CN 92101090 patent/CN1027921C/en not_active Expired - Fee Related
-
1993
- 1993-02-19 JP JP3075793A patent/JPH06160033A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386594C (en) * | 2004-04-07 | 2008-05-07 | 华南理工大学 | Non-contact measuring method and system for thickness and width |
| CN100588502C (en) * | 2008-05-28 | 2010-02-10 | 上海宝业机电科技有限公司 | Process for automatically measuring diameter of steel tube |
| CN102087100A (en) * | 2010-11-23 | 2011-06-08 | 东莞市日新传导科技股份有限公司 | FPGA (Field Programmable Gate Array) based laser diameter measuring method |
| CN102160690A (en) * | 2011-01-17 | 2011-08-24 | 大树智能科技(南京)有限公司 | Online detection and control method and device of periphery of filtering rod |
| CN102160690B (en) * | 2011-01-17 | 2013-09-18 | 南京大树智能科技股份有限公司 | Online detection and control method and device of periphery of filtering rod |
| CN103212829A (en) * | 2012-01-19 | 2013-07-24 | 昆山思拓机器有限公司 | Method for monitoring tube diameter change of medical stent |
| CN103217097A (en) * | 2012-01-19 | 2013-07-24 | 昆山思拓机器有限公司 | Thin-wall tube detection system |
| CN103212829B (en) * | 2012-01-19 | 2016-04-27 | 昆山思拓机器有限公司 | The method of monitoring medical bracket pipe diameter change |
| CN103217097B (en) * | 2012-01-19 | 2016-04-27 | 昆山思拓机器有限公司 | A kind of thin-wall tube detection system |
| CN102680366A (en) * | 2012-06-01 | 2012-09-19 | 苏州大学 | Electronic detecting method for raw milk nodes and device thereof |
| CN103542813A (en) * | 2013-07-05 | 2014-01-29 | 中国计量学院 | Laser diameter measuring instrument based on boundary differential and environmental light self-calibration |
| CN104034273A (en) * | 2014-06-23 | 2014-09-10 | 苏州经贸职业技术学院 | Device and method for measuring and monitoring wire diameters of copper-clad steel on basis of technology of internet of things |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06160033A (en) | 1994-06-07 |
| CN1027921C (en) | 1995-03-15 |
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