CN202814346U - High-precision strip deviation detecting device based on CCD - Google Patents
High-precision strip deviation detecting device based on CCD Download PDFInfo
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- CN202814346U CN202814346U CN 201220473625 CN201220473625U CN202814346U CN 202814346 U CN202814346 U CN 202814346U CN 201220473625 CN201220473625 CN 201220473625 CN 201220473625 U CN201220473625 U CN 201220473625U CN 202814346 U CN202814346 U CN 202814346U
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Abstract
The utility model relates to a high-precision strip deviation detecting device based on a CCD, comprising an infrared transmitting device and an infrared receiving device, wherein the infrared transmitting device and the infrared receiving device are respectively fixed on both ends of the edge of a strip in transmission, the fixed positions of the infrared transmitting device and the infrared receiving device corresponding to each other, the positions of the infrared transmitting device, a detected strip and the infrared receiving device are parallel to each other, and the infrared receiving device comprises a linear array CCD module unit. According to the utility model, as the infrared array CCD technology is introduced and infrared light is used as a detecting medium, the interference of external light source is eliminated, and the interference of all kinds of light in a factory environment on measurement results is effectively avoided. In addition, the high-precision strip deviation detecting device can obtain a considerably high measurement accuracy of up to 0.001mm and can effectively meet the requirements of deviation detection of a silicon steel production line or other production lines with special high-precision demands as the infrared linear array CCD has the characteristic of high-density integration.
Description
Technical field
The utility model belongs to detecting sensor technology in the automation field, is a kind of metallic foil that is applicable to, cold-strip steel, the high precision band offset detecting device based on CCD in all kinds of strip producing lines such as paper tape.
Background technology
Along with the development of national economy, the especially continuous expansion of manufacturing industry and real estate industry's scale, the demand of China's steel presents ascendant trend always.Traditional iron and steel production and processing line running speed is slow, and efficient is low and failure rate is high, thereby the robotization of iron and steel production and processing line and scale just improve constantly.
In all kinds of strip producing lines such as the galvanized wire in existing cold-strip steel unit, tinned wire, pickling line, length is long because unit has, many, the running speed high of quantity, and the out-of-flatness of band self, so that band is easy to occur the phenomenon that laterally swings sideslip and vertically pitch and rise and fall and jump in process of production.
Sideslip not only can affect machining precision and the quality of band, causes band can't roll up together, also can be so that strip edge collision flanging, even damage the entire volume band.And because production line has higher linear velocity, and more serious sideslip accident also can cause band to bump with unit equipment in process of production, and the serious consequences such as cause damage of equipment, broken belt, stopping production.For solving this problem of band camber control, domestic and international many units all are studied, and on all kinds of strip producing lines, have developed the midline position control system, and its employed transmission deviation detection method mainly contains following several types:
1) bias detecting method that forms based on high frequency fluorescent tube and light-receiving device, these class methods are based on the high frequency fluorescent tube, price is relatively cheap, but because the pollution of high frequency fluorescent tube is large, the life-span is low, failure rate is high, the production parking accident that causes because of lamp source fault, especially for galvanized wire, tinned wire, its loss is very large.On the other hand, since use is visible daylight, will be subject to the impact of ambient light.No matter it is daytime or evening, as long as have a branch of sunlight or light all can badly influence the control effect that band is offset, so that its sensitivity is lower.In addition, because these class methods use the high frequency fluorescent tube as the lamp source, and fluorescent tube can discharge a large amount of mercury after damaging, and its processing means are complicated, and cost is very high, and risk of environmental pollution is very big.It is reported that a common fluorescent tube contains mercury up to 23 milligrams, can pollute the air of about 8000 tons of water and 2400 cubic metres; Fluorescent lamp tube uses lead glass usually, the massicot in the lead glass can be under various physical environments replaced separating out slowly.Therefore, even fluorescent tube is adopted the mode of landfill or burning, these pollutants finally all can destroy human living environment with various forms, and serious harm is to human health.
2) based on the bias detecting method of Hall magnetic induction technology, these class methods are based on Hall magnetic induction technology, effectively avoided the life-span of last scheme low, affected by environment large, the shortcomings such as sensitivity is low, but since Hall magnetic induction technology itself to have measurement range little, energy consumption is large, expensive shortcoming, therefore cause based on the detecting sensor of these class methods in actual use, it is short not only to have range, energy consumption is large, the shortcoming such as expensive, but also can be because its measurement range be little, cause in vertical direction, spacing between detecting sensor and the band is too small, bump easily, and then so that damage appears in the core devices of sensor detecting unit, need to check frequently and change, this has not only improved its operating cost, has equally also affected its widespread use in band skew control.
3) based on the bias detecting method of laser technology, these class methods are based on laser technology, has workplace apart from larger, the advantages such as sensitivity is higher, and energy consumption is lower, environmental pollution is little, but this class methods scope of application is very narrow, thickness requirement to band to be detected is very high, need to be strict controlled between the 2-4 millimeter, otherwise can't work, this is so that the method can't be applied to the manufacturing procedure of a lot of light sheets.In addition, these class methods also have that range is short, expensive, less stable, and the shortcomings such as installation and maintenance difficulty can't satisfy the requirement of band offset detection, therefore also are not widely used.
For addressing these problems, patent ZL200610124524.7 " Web Transporting offset detection sensor " discloses a kind of based on ultrared Web Transporting offset detection sensor, this sensor efficiently solves that the existing pollution of above-mentioned two class sensors is large, the life-span is low, large, the shortcoming such as energy consumption is large, expensive affected by environment, but it has the installation calibrating difficulty, precision is lower, stability is not high, drift phenomenon is serious, sensitivity is subjected to the shortcomings such as distance affects between transmitter and the receiver is larger, has affected equally its effect in band skew control.
For the existing problem of prior art, the utility model proposes a kind of novel high-precision band bias detecting method and device thereof based on infrared linear CCD technology.It has installs simply, calibrate easy, sensitivity good, precision is very high, strong interference immunity, reliable and stable, zero shift, extremely low, cheap, the failure rate is low, pollution-free of energy consumption, range and workplace are apart from large, the advantage such as not affected by environment has solved the existing problem of prior art preferably.
The utility model content
The purpose of this utility model provide a kind of have install simple, calibrate easy, highly sensitive, strong interference immunity, reliable and stable, zero shift, extremely low, cheap, the failure rate is low, pollution-free of energy consumption, range and workplace are apart from large, high precision band offset detecting device based on CCD not affected by environment is to overcome the deficiencies in the prior art.
For achieving the above object, the technical scheme that adopts of the utility model is:
A kind of high precision band offset detecting device based on CCD, comprise infrared launcher and infrared receiving device, wherein infrared launcher and infrared receiving device are separately fixed at strip side in the transmission along two ends, the fixed position of infrared launcher and infrared receiving device is mutually corresponding, and infrared launcher, detected band and the position of infrared receiving device are parallel to each other.
Infrared launcher comprises power supply unit, the pulse generation unit, the variable-frequency pulse driver element, infrared emission unit and optical processing unit, infrared launcher is described to produce the low frequency carrier signal signal of a 500-800Hz and the high-frequency pulse signal of a 20-60KHz by the pulse generation unit, and by the variable-frequency pulse driver element, high-frequency pulse signal is carried out Combined Processing in the low frequency carrier signal signal, thereby obtain a kind of frequency conversion composite pulse signal with variable frequency of high anti-interference and high reliability ability, and this pulse signal is transported to infrared emission unit, process by the optical processing unit, launch after the infrared signal that produces is become parallel infrared pulse light signal.Wherein, infrared emission unit is to be connected by series-parallel system by plural at least infrared transmitting tube to consist of.
Infrared receiving device is responsible for receiving the infrared parallel optical signal by the infrared launcher emission, infrared receiving device comprises light filter, power supply unit, line array CCD group unit, CCD drive circuit unit, signal pre-processing circuit unit, binary conversion treatment circuit unit and conversion output circuit unit, and described line array CCD group unit is arranged by plural at least infrared line array CCD and consisted of.Band is arranged through out-of-date between infrared emitter and infrared receiving device, band will shield portions by the infrared parallel optical signal of infrared launcher emission, line array CCD group at infrared receiving device forms the shadow region, and the size of shadow region and the degrees of offset of band are closely related.Therefore, in the utility model, infrared receiving device is by reading line array CCD group unit by the signal of time serial output, read the sensitization length of line array CCD group, through the signal pre-processing circuit unit signal that receives is carried out pre-service, then calculated by the binary conversion treatment circuit unit, can draw the projection amount of band on infrared receiving device and the degrees of offset of band, and by the conversion output circuit unit result of calculation is processed, export by the requirement of midline position control system afterwards.
Because the utility model introduced infrared linear CCD technology, use infrared light as detecting medium, got rid of the interference of external light source, effectively avoided each lightlike line in the environment of plant to the interference of measurement result.In addition, because infrared line array CCD has the High Density Integration feature, therefore, the utility model can access quite high measuring accuracy, its precision can reach 0.001mm, can effectively satisfy the offset detection needs that silicon steel production line etc. has the production line of high precision specific (special) requirements.
In addition, the utility model adopts full-digital circuit to consist of, so that the utility model has simpler structure, stronger antijamming capability, higher sensitivity, faster response speed, lower energy consumption and cheaper price than prior art, solved preferably the existing problem of prior art.
The utility model not only is used in the belt transmission midline position control system of strip producing line, also is equally applicable in the detection control system of transmission location skew of the belt transmission systems such as plastic foil production, belt conveyor of cloth, the plastic molding and processing plant of paper tape, the weaving mill in paper mill.
Description of drawings
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is the composition structural representation of the utility model embodiment.
Fig. 4 is the infrared launcher optical processing unit principle assumption diagram of the utility model embodiment.
Fig. 5 is the circuit theory diagrams of the infrared launcher of the utility model embodiment.
Fig. 6 is the general frame of the infrared receiving device of the utility model embodiment.
Fig. 7 is the line array CCD group unit physical structure in the utility model embodiment infrared receiving device.
Fig. 8 is the CCD drive circuit unit circuit theory diagrams in the utility model embodiment infrared receiving device.
Fig. 9 is signal pre-processing circuit unit, binary conversion treatment circuit unit and the conversion output circuit unit circuit theory diagrams in the utility model embodiment infrared receiving device.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail, but this embodiment should not be construed as restriction of the present utility model.
As shown in Figure 1, the utility model embodiment comprises infrared launcher and two ingredients of infrared receiving device.Infrared launcher and infrared receiving device are installed in the homonymy with the steel transmission line, and require in the horizontal direction keeping parallelism, keep in vertical direction mutually corresponding.Its A to view as shown in Figure 2.
As shown in Figure 3, infrared receiving device 2 and infrared launcher 3 are separately fixed at the up and down two ends at motion band 1 edge in the transmission.Wherein, infrared receiving device 2 and infrared launcher 3 shells are rectangular parallelepiped, and a relative side respectively has window, and protective glass 6 is installed on the window.Infrared receiving tube array and signal processing circuit board 4 are installed in the infrared receiving device 2.Infrared transmitting circuit 5 is installed in the infrared launcher 3.Solid arrow among Fig. 3 is that infrared launcher 3 is to the parallel infrared light of infrared receiving device 2 projections.What the dotted line among Fig. 3 represented is the infrared detection signal that passive movement band 1 covers.
As shown in Figure 4, the infrared signal that the infrared launcher optical processing unit of the utility model embodiment will produce via the infrared emission unit that 12 infraluminescence pipes form has formed parallel infrared pulse light signal by the convex lens refraction.Groove among Fig. 4 by not thoroughly the strip plastics 9 of infrared light make, the surface has 12 holes, efficient beam scope as aperture diaphragm control infraluminescence pipe has reduced the interference between the infrared transmitting tube on the one hand, has avoided on the other hand the impact of reflected light on source of parallel light.Convex lens 8 adopt the lens of track and field racetrack, by to structural optimization, satisfied on the one hand the needs of the directional light of long distance, have overcome on the other hand the impact of the directional light blind area that the typical circular lens cause, and have had the easy-to-install characteristics.In the infrared launcher course of work, 12 infrared-emitting diodes 7 by the aperture diaphragm constraint of groove, send the infrared beam of one fixed width scope as pointolite, through the refraction of concavees lens 8, form the strip directional light.
The circuit theory diagrams of having showed infrared launcher among Fig. 5.As shown in Figure 5, this circuit has comprised four parts such as power supply unit, pulse generation unit, variable-frequency pulse driver element and infrared emission unit.Wherein, infrared emission unit is made of the infrared transmitting tube RD1-RD12 of 12 series connection.The effect of RD1-RD12 provides the infrared signal as detection signal.The pulse generation unit is made of 2 NE555 chips and a small amount of peripheral circuit, produces the low frequency carrier signal signal of a 500-800Hz and the high-frequency pulse signal of a 20-60KHz.The output terminal of pulse generation unit links to each other with the variable-frequency pulse driver element, by the variable-frequency pulse driver element, carry out compound and amplification processing in the low frequency carrier signal signal high-frequency pulse signal, thereby obtain a kind of frequency conversion composite pulse signal with variable frequency of high anti-interference and high reliability ability, realize the modulation to infrared transmitting circuit.The collector of variable-frequency pulse driver element links to each other with the negative terminal of infrared emission unit radiating circuit, drives infrared emission unit and produces infrared signal.
As shown in Figure 6, the infrared receiving device of the utility model embodiment is made of light filter, power supply unit, line array CCD group unit, CCD drive circuit unit, signal pre-processing circuit unit, binary conversion treatment circuit unit and conversion output circuit unit.Wherein, light filter has played the filtering ring environmental light, and the effect of filtering interfering its objective is other light filtering beyond the infrared light, so that infrared receiving device can not be subject to the impact of ambient light, thereby has improved the degree of accuracy of infrared receiving device.Line array CCD group unit is 150 * 5 by four block specifications, resolution is the infrared line array CCD of 600dpi, dividing 2 rows to arrange by interlace mode forms, be responsible for receiving the parallel infrared pulse light signal of being launched by infrared launcher, its physical arrangement as shown in Figure 7, effectively overcome the detection blind area of infrared line array CCD edge zone, improved the degree of accuracy and the sensitivity that detect, avoided band to be positioned at the situation that can't detect that occurs when the blind area is offset by a small margin.The CCD drive circuit unit is driven by on-site programmable gate array FPGA, its driving circuit as shown in Figure 8, it is output as the linear serial signal of the valid pixel unit that collects from infrared line array CCD.By CCD drive circuit unit circuit diagram shown in Figure 8 as can be known, this circuit utilizes the characteristics of the concurrent working of FPGA, uses FPGA crystal oscillator frequency division, produces respectively four road strict sequential orders, the driving signal of strict phase place, pass through respectively the Φ SG of four phase inverters and line array CCD chip, Φ R, Φ 1, Φ 2 pins are connected, through the output of OS end, obtain the linear serial signal of valid pixel unit, access signal pre-processing circuit unit after through triode signal being amplified again.In the utility model embodiment, the circuit of signal pre-processing circuit unit is shown in appropriate section among Fig. 9, its effect is to realize envelope detection by differential amplification and low-pass filtering mode, by resistance and electric capacity and operational amplifier, filtering high order clutter is finished oppositely, amplify, the function of filtering flip-flop reaches the purpose of optimizing signal waveform, so that access binary conversion treatment circuit unit.The binary conversion treatment circuit unit comprises that binaryzation electronic circuit and AD sampling electronic circuit two parts form.What the binaryzation electronic circuit adopted is the voltage comparator circuit of variable thresholding, and its structure is shown in binaryzation sub-circuit portion among Fig. 9.Wherein, operational amplifier is operated in the nonlinear operation district, and reverse input end receives the signal after the low-pass filtering, positive input and slide rheostat join, by regulating the dividing potential drop of slide rheostat, control the size of threshold value, thereby adapt to the different demands of the environment of plant.Subsequently, AD sampling electronic circuit is responsible for receiving the signal by after the binaryzation of binaryzation electronic circuit generation, TLC5510 samples by the ultra high speed A/D conversion chip, the sampled value of AD chip, the clock signal of AD chip is provided by the RS signal in the CCD driving signal of FPGA output, the enable signal of AD chip is provided by the SH signal in the CCD driving signal of FPGA output, thereby guaranteed the AD chip on sequential and the output strict conformance of CCD, and then the digital quantity after the AD conversion is sent into FPGA keep in and count, because be consistent in sequential, the accuracy of Output rusults and the accuracy of measurement have therefore been guaranteed.
The conversion output circuit unit is made of analog-digital chip DAC, its objective is the side-play amount according to resulting band, exports corresponding analog control signal by the requirement of midline position control system.
After output terminal of the present utility model connected control device, control device just can be finished and effectively control after the skew event occuring in the Web Transporting process.
Clearly, the utility model is not limited to above-described embodiment, but can change in the situation that does not break away from invention scope and thought and revise, so this embodiment should not be construed as restriction of the present utility model.
The content that this instructions is not described in detail belongs to and well known to a person skilled in the art prior art.
Claims (2)
1., a kind of high precision band offset detecting device based on CCD, comprise infrared launcher and infrared receiving device, it is characterized in that: described infrared launcher and infrared receiving device are separately fixed at strip side in the transmission along two ends, the fixed position of infrared launcher and infrared receiving device is mutually corresponding, and infrared launcher, detected band and the position of infrared receiving device are parallel to each other.
2. the high precision band offset detecting device based on CCD as claimed in claim 1 is characterized in that: described
Infrared launcher comprises power supply unit, pulse generation unit, variable-frequency pulse driver element, infrared emission unit and optical processing unit, described pulse generation unit is connected to infrared emission unit by the variable-frequency pulse driver element, infrared emission unit connects the optical processing unit, wherein, infrared emission unit is to be connected by series-parallel system by plural at least infrared transmitting tube to consist of;
Infrared receiving device comprises light filter, power supply unit, line array CCD group unit, CCD drive circuit unit, signal pre-processing circuit unit, binary conversion treatment circuit unit and conversion output circuit unit, described line array CCD group unit is arranged by plural at least infrared line array CCD and is consisted of, the CCD drive circuit unit connects the sensitization length that line array CCD group unit reads the line array CCD group in the infrared receiving device, and the CCD drive circuit unit is connected with the conversion output circuit unit with the binary conversion treatment circuit unit by the signal pre-processing circuit unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220473625 CN202814346U (en) | 2012-09-17 | 2012-09-17 | High-precision strip deviation detecting device based on CCD |
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| CN 201220473625 CN202814346U (en) | 2012-09-17 | 2012-09-17 | High-precision strip deviation detecting device based on CCD |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104567598A (en) * | 2014-12-31 | 2015-04-29 | 彩虹（合肥）液晶玻璃有限公司 | Device and method for measuring forming furnace-discharging deviation of liquid crystal substrate glass |
| CN105486269A (en) * | 2015-11-27 | 2016-04-13 | 北大方正集团有限公司 | Printed circuit board electroplating clamp point location detection circuit |
| CN105910538A (en) * | 2016-04-21 | 2016-08-31 | 厦门大学 | Fabric width online measuring device |
| CN107421451A (en) * | 2017-08-09 | 2017-12-01 | 钛玛科（北京）工业科技有限公司 | Wide cut sensing detection device and deviation correction control system based on W types monitoring point layout |
| CN108107479A (en) * | 2017-12-07 | 2018-06-01 | 华东交通大学 | Firm cargo state monitoring device is rolled up in a kind of railway transportation |
| CN108225202A (en) * | 2016-12-10 | 2018-06-29 | 南京理工大学 | Steel rail displacement on-line measurement system and measuring method based on line array CCD |
| CN108253892A (en) * | 2017-12-30 | 2018-07-06 | 南京陶特思软件科技有限公司 | Detect the measuring device of silicon chip sag of chain |
-
2012
- 2012-09-17 CN CN 201220473625 patent/CN202814346U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104567598A (en) * | 2014-12-31 | 2015-04-29 | 彩虹（合肥）液晶玻璃有限公司 | Device and method for measuring forming furnace-discharging deviation of liquid crystal substrate glass |
| CN105486269A (en) * | 2015-11-27 | 2016-04-13 | 北大方正集团有限公司 | Printed circuit board electroplating clamp point location detection circuit |
| CN105486269B (en) * | 2015-11-27 | 2019-06-04 | 北大方正集团有限公司 | Printed circuit board plating folder Point location detection circuit |
| CN105910538A (en) * | 2016-04-21 | 2016-08-31 | 厦门大学 | Fabric width online measuring device |
| CN108225202A (en) * | 2016-12-10 | 2018-06-29 | 南京理工大学 | Steel rail displacement on-line measurement system and measuring method based on line array CCD |
| CN107421451A (en) * | 2017-08-09 | 2017-12-01 | 钛玛科（北京）工业科技有限公司 | Wide cut sensing detection device and deviation correction control system based on W types monitoring point layout |
| CN108107479A (en) * | 2017-12-07 | 2018-06-01 | 华东交通大学 | Firm cargo state monitoring device is rolled up in a kind of railway transportation |
| CN108253892A (en) * | 2017-12-30 | 2018-07-06 | 南京陶特思软件科技有限公司 | Detect the measuring device of silicon chip sag of chain |
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Granted publication date: 20130320 Termination date: 20140917 |
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