CN105091764A - Measurement method of laser and CCD-based glass thickness measurement system - Google Patents
Measurement method of laser and CCD-based glass thickness measurement system Download PDFInfo
- Publication number
- CN105091764A CN105091764A CN201510560730.1A CN201510560730A CN105091764A CN 105091764 A CN105091764 A CN 105091764A CN 201510560730 A CN201510560730 A CN 201510560730A CN 105091764 A CN105091764 A CN 105091764A
- Authority
- CN
- China
- Prior art keywords
- laser
- glass
- ccd
- thickness
- array ccd
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a measurement method of a laser and CCD-based glass thickness measurement system. The system comprises a measurement probe, a control module, a display module, a water pump, a water tank and a position control device. The measurement probe comprises a housing, a laser transmitter and a linear array CCD, wherein the laser transmitter and the linear array CCD are positioned in the housing. The control module is respectively connected with the laser transmitter, the linear array CCD, the display module, the water pump and the position control device. The inner wall of the housing is provided with a running water heat-dissipation layer. One end of the running water heat-dissipation layer is connected with the water outlet of the water tank via the water pump. The other end of the running water heat-dissipation layer is connected with an external drain channel. During measurement, firstly, the measurement probe is cooled and then is delivered into a measurement area. After that, the measurement probe sends out the laser at a preset angle and then receives the laser reflected by the linear array CCD. Then the vertical distance between the laser after being reflected by an upper interface of the glass and a lower interface of the glass can be calculated. Finally, the thickness of the glass can be calculated and displayed. The method is simple in design and convenient to use, which can be used for detecting the thickness of the glass in a high-temperature region.
Description
Technical field
The present invention relates to field of optical measurements, particularly relate to a kind of measuring method of the thickness of glass measuring system based on laser and CCD.
Background technology
CCD (ChargeCoupledDevice), charge-coupled image sensor is the novel semi-conductor integrated optoelectronic device grown up early 1970s.
CCD device is divided into line array CCD and area array CCD two class by the arrangement mode of its photosensitive unit.
Line array CCD structure is simple, and cost is lower.A line TV signal can be stored simultaneously. because the number of its single photosensitive unit can do a lot, under the prerequisite of equal measuring accuracy, it is larger that its measurement range can be done, and due to line array CCD real-time Transmission light-to-current inversion signal with self-scanning speed is fast, frequency response is high, kinetic measurement can be realized, and can work under low-light (level), so line array CCD is widely used in many fields such as product size measurement and classification, noncontact dimension measurement, bar code.
For area array CCD, application surface is comparatively wide, as area, shape, size, position, and the even measurement of temperature etc.The advantage of area array CCD to obtain two-dimensional image information, and measurement image is directly perceived.Shortcoming is that pixel sum is many, and the pixel number of often going is general few compared with linear array, frame amplitude-frequency is restricted, and the advantage of line array CCD is one dimension pixel number can do a lot, and total pixel number is few compared with area array CCD camera, and pixel dimension is relatively more flexible, frame width number is high, is specially adapted to the measurement of one dimension dynamic object.For line array CCD on-line measurement wire diameter, just introduce to some extent in many papers, but be all based under desirable condition when relating to image procossing, and from the angle of practical engineering application, linear array CCD image Processing Algorithm is still quite complicated.
Due to the restriction of production technology, the area of single area array CCD is difficult to reach the demand of general industry measurement to visual field.The advantage of line array CCD is that resolving power is high, cheap, as TCD1501C type line array CCD, photosensitive pixel number is 5000, pixel dimension is 7 μm × 7 μm × 7 μm (adjacent picture elements centre distance) this line array CCD one-dimensional image length 35mm, the requirement that great majority measure visual field can be met, but obtain two dimensional image with line array CCD, scanning motion must be equipped with, and in order to the correspondence position of each pixel of image on measured piece can be determined, the devices such as grating also must be equipped with to record the coordinate of each scan line of line array CCD.Supposedly, the requirement of these two aspects causes obtaining image with line array CCD following deficiency: image acquisition time is long, measures efficiency low; Due to the existence of scanning motion and corresponding position feedback element, add system complexity and cost; The precision of images may reduce by the impact of scanning motion precision, finally affects measuring accuracy.
Even so, the scheme that line array CCD obtains image still has its distinctive advantage in following several respects: line array CCD adds scanning mechanism and position feedback element, and its cost is still significantly less than the area array CCD of same homalographic, equal resolution; The coordinate of scan line is provided by grating, and the indicating accuracy of high-precision grating scale can higher than the manufacturing accuracy of area array CCD image space-between, and in this sense, the image precision in a scanning direction that line array CCD obtains can higher than Array CCD; The pixel of two CCD chip can be made it mutual dislocation 1/2 pixel by the method for optics by the splicing of the line array CCD sub-pixed mapping recently occurred on the spread length direction of linear array, all pixels of second CCD are equivalent to insert in the pixel gap of first CCD successively, " reduction " line array CCD pixel dimension indirectly, improve the resolution of CCD, alleviate the difficult problem owing to being difficult to reduce CCD pixel dimension by technique and Effect of Materials, the resolution higher than area array CCD and precision can be obtained in theory.
Therefore, the scheme that line array CCD adds scanning motion acquisition image still uses extensively at present, is especially requiring that visual field is large, even can not substitute with area array CCD when image resolution ratio is high.But only have high resolution can't ensure high image recognition precision, although particularly the image resolution of line array CCD acquisition is high, due to the impact by scanning motion precision, its image comparatively Array CCD has more singularity.Therefore, not only to make full use of resolution high advantage during image recognition, also must overcome the impact of scanning motion from algorithm, make the image recognition precision that the unlikely direct impact of mechanically operated error is final.
Current domestic glass production producer extensively adopts float glass production process, the production run of float glass allows glass melt liquid float on the surface of tin liquor, thickness is adjusted in the humidity province of 900 DEG C ~ 700 DEG C in molten tin bath, at the humidity province hardened forming of 600 DEG C, after the annealing of annealed kiln, cool cutting.Domestic manufacturer carries out the method for Thickness sensitivity again after all adopting float glass thoroughly to cool aborning, cause thickness of glass to measure feedback signal lags thickness of glass control system 40 minutes, easily cause damage because thickness of glass does not meet national standard.
Summary of the invention
Technical matters to be solved by this invention is for defect involved in background technology, provides a kind of measuring method of the thickness of glass measuring system based on laser and CCD.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
Based on the measuring method of the thickness of glass measuring system of laser and CCD, described system comprises measuring sonde, control module, display module, water pump, water tank and position control, wherein, control module, display module, water pump, water tank, position control are arranged on outside measured zone, measuring sonde comprises housing, generating laser and line array CCD, and control module is connected with generating laser, line array CCD, display module, water pump, position control respectively;
Generating laser, line array CCD are included by described housing, are provided with the second channel of first passage and the line array CCD reception laser supplying laser transmitter projects laser;
Described inner walls is provided with flowing water heat dissipating layer, and described flowing water heat dissipating layer one end is connected with the water delivering orifice pipeline of water tank by water pump, and the other end is connected with externally drained passage by pipeline;
Described measuring method comprises following steps:
Step 1), control pump working, measuring sonde is lowered the temperature;
Step 2), by position control, measuring sonde is delivered in measured zone;
Step 3), control generating laser with the angular emission laser preset;
Step 4), receive the laser behind interface on glass and lower boundary reflection by line array CCD;
Step 5), filtering process is carried out to the output data of line array CCD, filters out noise;
Step 6), calculate the vertical range between the laser behind interface on glass and lower boundary reflection;
Step 7), the incident angle of the laser that laser transmitter projects goes out is calculated according to the angle gauge preset;
Step 8), the thickness of glass is gone out according to following formulae discovery:
Wherein, H is the thickness of glass, and D is the vertical range between the laser on glass after interface and lower boundary reflection, and U is the refractive index of glass, T
0for the incident angle of the laser that laser transmitter projects goes out;
Step 9), control display module and show the thickness of glass calculated.
As the further prioritization scheme of measuring method of thickness of glass measuring system that the present invention is based on laser and CCD, the outer wall of described housing is provided with vacuum layer.
As the further prioritization scheme of measuring method of thickness of glass measuring system that the present invention is based on laser and CCD, the processor of described control module adopts 51 series monolithics.
As the further prioritization scheme of measuring method of thickness of glass measuring system that the present invention is based on laser and CCD, the processor of described control module adopts AT89S52 single-chip microcomputer.
As the further prioritization scheme of measuring method of thickness of glass measuring system that the present invention is based on laser and CCD, described display module just uses liquid crystal display.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1. simplicity of design, easy to use;
2. can detect thickness of glass in high-temperature region, improve product quality;
3. make production line adjust thickness of glass time can rapid adjustment complete, improve efficiency.
Embodiment
Below technical scheme of the present invention is described in further detail:
The invention discloses a kind of measuring method of the thickness of glass measuring system based on laser and CCD, described system comprises measuring sonde, control module, display module, water pump, water tank and position control, wherein, control module, display module, water pump, water tank, position control are arranged on outside measured zone, measuring sonde comprises housing, generating laser and line array CCD, and control module is connected with generating laser, line array CCD, display module, water pump, position control respectively;
Generating laser, line array CCD are included by described housing, are provided with the second channel of first passage and the line array CCD reception laser supplying laser transmitter projects laser;
Described inner walls is provided with flowing water heat dissipating layer, and described flowing water heat dissipating layer one end is connected with the water delivering orifice pipeline of water tank by water pump, and the other end is connected with externally drained passage by pipeline;
Described measuring method comprises following steps:
Step 1), control pump working, measuring sonde is lowered the temperature;
Step 2), by position control, measuring sonde is delivered in measured zone;
Step 3), control generating laser with the angular emission laser preset;
Step 4), receive the laser behind interface on glass and lower boundary reflection by line array CCD;
Step 5), filtering process is carried out to the output data of line array CCD, filters out noise;
Step 6), calculate the vertical range between the laser behind interface on glass and lower boundary reflection;
Step 7), the incident angle of the laser that laser transmitter projects goes out is calculated according to the angle gauge preset;
Step 8), the thickness of glass is gone out according to following formulae discovery:
Wherein, H is the thickness of glass, and D is the vertical range between the laser on glass after interface and lower boundary reflection, and U is the refractive index of glass, T
0for the incident angle of the laser that laser transmitter projects goes out;
Step 9), control display module and show the thickness of glass calculated.
The outer wall of described housing is provided with vacuum layer.
The processor of described control module adopts 51 series monolithics, preferential employing AT89S52 single-chip microcomputer.
Described display module just uses liquid crystal display.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. based on the measuring method of the thickness of glass measuring system of laser and CCD, described system comprises measuring sonde, control module, display module, water pump, water tank and position control, wherein, control module, display module, water pump, water tank, position control are arranged on outside measured zone, measuring sonde comprises housing, generating laser and line array CCD, and control module is connected with generating laser, line array CCD, display module, water pump, position control respectively;
Generating laser, line array CCD are included by described housing, are provided with the second channel of first passage and the line array CCD reception laser supplying laser transmitter projects laser;
Described inner walls is provided with flowing water heat dissipating layer, and described flowing water heat dissipating layer one end is connected with the water delivering orifice pipeline of water tank by water pump, and the other end is connected with externally drained passage by pipeline;
It is characterized in that, described measuring method comprises following steps:
Step 1), control pump working, measuring sonde is lowered the temperature;
Step 2), by position control, measuring sonde is delivered in measured zone;
Step 3), control generating laser with the angular emission laser preset;
Step 4), receive the laser behind interface on glass and lower boundary reflection by line array CCD;
Step 5), filtering process is carried out to the output data of line array CCD, filters out noise;
Step 6), calculate the vertical range between the laser behind interface on glass and lower boundary reflection;
Step 7), the incident angle of the laser that laser transmitter projects goes out is calculated according to the angle gauge preset;
Step 8), the thickness of glass is gone out according to following formulae discovery:
Wherein, H is the thickness of glass, and D is the vertical range between the laser on glass after interface and lower boundary reflection, and U is the refractive index of glass, T
0for the incident angle of the laser that laser transmitter projects goes out;
Step 9), control display module and show the thickness of glass calculated.
2. the measuring method of the thickness of glass measuring system based on laser and CCD according to claim 1, it is characterized in that, the outer wall of described housing is provided with vacuum layer.
3. the measuring method of the thickness of glass measuring system based on laser and CCD according to claim 1, it is characterized in that, the processor of described control module adopts 51 series monolithics.
4. the measuring method of the thickness of glass measuring system based on laser and CCD according to claim 3, is characterized in that, the processor of described control module adopts AT89S52 single-chip microcomputer.
5. the measuring method of the thickness of glass measuring system based on laser and CCD according to claim 1, it is characterized in that, described display module just uses liquid crystal display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510560730.1A CN105091764A (en) | 2015-09-06 | 2015-09-06 | Measurement method of laser and CCD-based glass thickness measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510560730.1A CN105091764A (en) | 2015-09-06 | 2015-09-06 | Measurement method of laser and CCD-based glass thickness measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105091764A true CN105091764A (en) | 2015-11-25 |
Family
ID=54572726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510560730.1A Pending CN105091764A (en) | 2015-09-06 | 2015-09-06 | Measurement method of laser and CCD-based glass thickness measurement system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105091764A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052574A (en) * | 2016-07-27 | 2016-10-26 | 南京师范大学 | Thickness measuring device and its method for steel material in red hot state |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002162360A (en) * | 2000-11-22 | 2002-06-07 | Seiko Epson Corp | Method and equipment for evaluating liquid crystal panel |
| CN2655174Y (en) * | 2003-09-27 | 2004-11-10 | 浙江大学蓝星新材料技术有限公司 | On-line thick detector for float glass |
| CN1755320A (en) * | 2004-09-30 | 2006-04-05 | 宋才秀 | Instrument for detecting wall thickness of glass tube |
| JP2010048745A (en) * | 2008-08-25 | 2010-03-04 | Asahi Glass Co Ltd | Defect inspection system and defect inspection method |
| CN201955067U (en) * | 2010-12-22 | 2011-08-31 | 洛阳同邦自动化设备有限公司 | Online substrate glass thickness measuring instrument |
-
2015
- 2015-09-06 CN CN201510560730.1A patent/CN105091764A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002162360A (en) * | 2000-11-22 | 2002-06-07 | Seiko Epson Corp | Method and equipment for evaluating liquid crystal panel |
| CN2655174Y (en) * | 2003-09-27 | 2004-11-10 | 浙江大学蓝星新材料技术有限公司 | On-line thick detector for float glass |
| CN1755320A (en) * | 2004-09-30 | 2006-04-05 | 宋才秀 | Instrument for detecting wall thickness of glass tube |
| JP2010048745A (en) * | 2008-08-25 | 2010-03-04 | Asahi Glass Co Ltd | Defect inspection system and defect inspection method |
| CN201955067U (en) * | 2010-12-22 | 2011-08-31 | 洛阳同邦自动化设备有限公司 | Online substrate glass thickness measuring instrument |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052574A (en) * | 2016-07-27 | 2016-10-26 | 南京师范大学 | Thickness measuring device and its method for steel material in red hot state |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8785898B2 (en) | Device and method for detecting liquid level of molten silicon using laser reflected from curved mirror | |
| CN102147281B (en) | Machine-vision based liquid level detection device and method | |
| CN103383360B (en) | A kind of thin strap continuous casting blank surface defects sinusoidal grating phase shift detection device and detection method | |
| CN105350071B (en) | A kind of straight pulling silicon single crystal furnace liquid-level detecting method for suppressing fluctuation | |
| CN203454973U (en) | Sealing glue detection apparatus and display panel box forming apparatus | |
| KR20140136032A (en) | Dual beam non-contact displacement sensor | |
| CN102968794B (en) | In-situ calibration method for structure parameters of large-visual-field binocular stereo vision system by small two-dimensional targets | |
| CN202008382U (en) | Liquid level detector based on machine vision | |
| CN101568796A (en) | Film thickness measuring method, its apparatus, and manufacturing system for thin-film device | |
| CN108332708A (en) | Laser leveler automatic checkout system and detection method | |
| CN103411585A (en) | Sedimentation measurement method by laser spot imaging technique | |
| CN101788286B (en) | Device and method for measuring vertical displacement of buildings | |
| CN102749303B (en) | A kind of apparatus and method measuring refractive index of flat-plate type transparent medium | |
| CN104215179B (en) | The method that width of steel billet is dynamically measured using laser displacement sensor | |
| CN101738243A (en) | Method for detecting reflective liquid level displacement based on angular displacement tracking | |
| CN101509801A (en) | Intelligent light source linear array CCD liquid level measuring method and device | |
| CN102538694A (en) | Method and device for monitoring deformation of base point of dam abutment | |
| CN105258645A (en) | Glass thickness measurement system based on laser and CCD | |
| CN103344187A (en) | Metallurgical product width on-line measurement device and method | |
| CN203605907U (en) | Part detection system | |
| CN101979168A (en) | High-precision online measuring instrument and measuring method for strip shape of plate and strip | |
| CN105091764A (en) | Measurement method of laser and CCD-based glass thickness measurement system | |
| CN103464694A (en) | Liquid level detecting device for casting of magnesium alloy and detecting method of liquid level detecting device for casting of magnesium alloy | |
| CN207502419U (en) | Glass inspection systems | |
| CN103438803B (en) | Computer vision technique accurately measures the method for Rectangular Parts size across visual field |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151125 |
|
| RJ01 | Rejection of invention patent application after publication |