CN210141980U - Calibration device - Google Patents
Calibration device Download PDFInfo
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- CN210141980U CN210141980U CN201920987231.4U CN201920987231U CN210141980U CN 210141980 U CN210141980 U CN 210141980U CN 201920987231 U CN201920987231 U CN 201920987231U CN 210141980 U CN210141980 U CN 210141980U
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Abstract
The utility model discloses a calibration device for carry out position calibration to the vision detection system, the calibration device includes the laser module, lights the laser module, and the light beam sees through Fresnel lens and forms images on the imaging plate, controls the industrial camera to finish the first picture taking, rotates an angle, controls the industrial camera to finish the second picture taking; calculate the pixel coordinate of the laser imaging point of twice shooing to calculate the relation between angle and the pixel, the utility model provides a position calculation error that visual detection system installation distance error, lens focus error and arouse carries out the position through using a calibration system to many visual detection systems and marks, can guarantee every visual detection system's detection uniformity and measurement accuracy.
Description
Technical Field
The utility model relates to a visual detection application, concretely relates to calibration device.
Background
In the optical detection process of the vehicle lamp, according to regulations, the light distribution performance of the headlamp needs to be measured on a vertical light distribution screen which is 25m away from the reference center of the headlamp, and in actual production, a lens is used for controlling the distance to be about 1m so as to simulate the imaging of the distance of 25m, and a visual detection method is used, so that the floor area of a production line is reduced, and the test efficiency is improved.
However, due to the processing error and the installation error of each car light vision detection system, errors exist between the distance from the car light to the lens, the distance from the lens to the imaging plate and the design value, and in addition, the focal length error of the lens itself can cause inconsistent detection results of the same car light on multiple vision detection systems, so that a calibration device is urgently needed to solve the problem that different vision detection systems in the prior art cannot be calibrated.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that the visual detection system of difference can't be markd among the prior art, provide a calibration equipment, rectify current visual detection system, make each visual detection system's benchmark unanimous.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a calibration device is used for carrying out position calibration on the visual detection system, the visual detection system comprises an industrial camera, an industrial computer, a Fresnel lens and an imaging plate, the industrial camera is used for shooting images on the imaging plate, the industrial computer is connected with the industrial camera, and the images shot by the industrial camera are processed and calculated;
the utility model provides a calibration device, includes laser module and formation of image board, be equipped with lens between laser module and the formation of image board, the laser module includes laser generator and roating seat, laser generator fixes on the roating seat, the roating seat is rotationally installed on the fixing base, fixed motor on the fixing base, the roating seat by motor drive deflects.
Furthermore, the calibration device further comprises a support rod for supporting the fixing seat and a bearing plate fixedly installed on the support rod, and the bearing plate is detachably installed on the detection platform.
Further, the lens is a fresnel lens, a center point of the fresnel lens and an axis of the laser generator are on a horizontal line in an initial state, a distance between the center of the fresnel lens and a light emitting point of the laser generator is 350mm, and a distance between the center of the fresnel lens and a center of the imaging plate is 700 mm.
Further, the laser generator is a cross laser generator, and the model of the cross laser generator is TZL 2090.
Compared with the prior art, the beneficial effects of the utility model are that: the calibration device of the utility model comprises a laser module and an imaging plate, a lens is arranged between the laser module and the imaging plate, the laser module is an adjustable laser module, can mark different vision detection system, specifically, laser module includes laser generator and roating seat, and laser generator fixes on the roating seat, and the roating seat is rotationally installed on the fixing base, fixed motor on the fixing base, and the roating seat is deflected by motor drive, the utility model discloses a calibration device marks vision detection system, finds the relation of vision detection system angle and pixel, has solved the relation that adopts theoretical calculation angle and pixel among the prior art, can have the problem of great error with actual conditions, the utility model discloses can eliminate vision detection system's measuring error to guarantee every vision detection system's detection uniformity, improve the test accuracy.
Drawings
Fig. 1 is a schematic block diagram of a calibration apparatus according to an embodiment of the present invention;
fig. 2 is a top view of a calibration apparatus provided in an embodiment of the present invention;
fig. 3 is a flowchart of a calibration method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a calibration device, this calibration device are used for demarcating vision detecting system, as shown in figure 1 and figure 2, this calibration device includes laser module 23 and formation of image board 14, is equipped with lens 13 between laser module 23 and the formation of image board 14, and laser module 23 includes laser generator and roating seat, and laser generator fixes on the roating seat, and the roating seat is rotationally installed on the fixing base, fixed motor 21 on the fixing base, and the roating seat is deflected by the drive of motor 21.
Further, the calibration device further comprises:
an industrial camera 11, the industrial camera 11 being used to take an image on the imaging plate 14;
the industrial computer 12 is connected with the industrial camera 11, and the industrial computer 12 processes and calculates the images shot by the industrial camera 11.
Further, the calibration device further comprises a support rod for supporting the fixing seat and a bearing plate 24 for fixedly mounting the support rod, wherein the bearing plate 24 is detachably mounted on the visual inspection system, namely the inspection table.
Further, the lens 13 is a fresnel lens 13, a center point of the fresnel lens 13 is on a horizontal line with an axis of the laser generator in an initial state, a distance between a center of the fresnel lens 13 and a light emitting point of the laser generator is 350mm, and a distance between a center of the fresnel lens 13 and a center of the imaging plate 14 is 700 mm.
Further, the vision detection system comprises a power supply 10, the power supply 10 supplies power for the calibration device, specifically, the power supply 10 has single-group output and active PFC adjustment, the power supply 10 adopts the model of RSP-100-24, the power supply has the function of outputting 24V voltage to supply power for the calibration system and the industrial camera 11, and the power supply 10 has the characteristics of short circuit, overload, overvoltage, over-temperature protection and the like.
Further, the industrial camera 11 is Mer-200-14gc in model number, and has the function of collecting images, and the industrial camera 11 has the advantages of high resolution, high definition, low noise, small size, convenience in installation and the like.
Further, the industrial computer 12 is of the type IPC-7120, and functions as a master controller of the system, running software, controlling the motor 21, and processing images.
Further, calibration device still includes step-down module 22, and step-down module 22 electricity is connected power supply 10, and step-down module 22 is connected to laser module 23 electricity, and specifically, the model that step-down module 22 adopted is LM2596, and step-down module 22 has the input of wide pressure, adjustable output is small, advantage such as with low costs, and its function is for laser module 23 power supply, thereby adjustable laser module 23 luminance through the output voltage who adjusts step-down module 22.
Further, the motor 21 is a serial port control drive integrated stepping motor 21, the model of the motor 21 is VSMD102025T, the function of the motor is to provide a standard input angle for a position calibration system, and the motor 21 has the advantages of small volume, simple wiring, easiness in control and the like.
Further, the laser generator is a cross laser generator, the input voltage of the laser generator is 3-5V, the model of the laser generator is TZL2090, the function of the laser generator is to punch a cross light shape on the imaging plate 14 through the Fresnel lens 13, and the position coordinate of the intersection point of the two lines, namely the pixel coordinate, is calculated.
The embodiment also provides a calibration method for carry out position calibration to car light visual detection system, through calculating the corresponding relation of visual detection system angle and pixel, thereby can accurately find the actual pixel coordinate that the test point in national standard GB25991-2010 corresponds in the image when measuring the car light, solved and adopted the theoretical value technique to go out the problem that there is the error in the corresponding relation between visual detection system angle and the pixel, the utility model discloses can improve the accuracy of visual detection system testing result and improve the uniformity of many visual detection system testing results.
Specifically, as shown in fig. 3, the method includes:
s1 lights the laser module 23, then the industrial computer 12 controls the motor 21 to drive the laser module 23 to rotate to a position A, the laser beam forms an image on the imaging plate 14 through the Fresnel lens 13, a P1 point is obtained on the imaging plate 14, the industrial camera 11 is controlled to finish the first photographing, then the industrial computer 12 controls the motor 21 to drive the laser module 23 to rotate by an angle theta to reach a position B, at the moment, a P2 point is obtained on the imaging plate 14, and the industrial camera 11 is controlled to take a second photographing;
s2 acquiring two images taken by the camera 11;
s3 respectively carries out image processing on the two acquired images, and calculates the pixel coordinates of P1 and P2, wherein the pixel coordinate of the point P1 is marked as (Pix)P1，FixP1) The pixel coordinate of the point P2 is denoted as (Pix)P2，FixP2)；
S4, calculating the number P of pixel points in the angle unit;
further, the angle unit of the visual inspection system is set to 1%, and 1% ═ arctan (0.01) ═ 0.572939 degrees.
Further, if the laser module 23 rotates laterally, the relationship between the angle and the pixel is calculated by:
if the laser module 23 rotates vertically, the way of calculating the relationship between the angle and the pixel is as follows:
further, the method of calculating the pixel coordinates of P1 and P2 includes:
a. converting the images acquired twice into gray level images;
b. carrying out threshold processing on the gray-scale image to obtain a two-dimensional image;
c. performing area filtering on the two-dimensional image, and filtering out unnecessary parts;
d. performing expansion processing on the image;
e. line finding is carried out by adopting Gauss;
f. merging the found lines;
g. filtering the found lines;
h. judging whether the found lines are two lines or not;
i. if the found line is two lines, the pixel coordinates of the P1 and P2 points continue to be calculated.
The utility model also provides a calibration system, this system are applied to foretell calibration device, specifically, this system includes:
an image generation module for imaging twice on the imaging plate 14 of the calibration system;
the image acquisition module acquires two times of imaging;
the image processing module is used for carrying out image processing on the obtained two imaging processes and calculating the pixel coordinates of the imaging points in the two imaging processes;
and the calculating module is used for calculating the number P of pixel points in the angle unit.
Further, the two imaging processes respectively obtain a point P1 and a point P2, the pixel coordinates of the point P1 and the point P2 are calculated, and the pixel coordinate of the point P1 is marked as (Pix)P1，FixP1) The pixel coordinate of the point P2 is denoted as (Pix)P2，FixP2) Then, calculating the number P of pixels in the angle unit, wherein the mode of calculating the number P of pixels in the angle unit is as follows:
or
The utility model also provides a visual detection system's position calibration operation method, specifically as follows:
the calibration system is connected with the visual detection system in a butt joint mode, then system software in the industrial computer 12 is opened, then a calibration interface is opened, and the relation between the angle and the pixel can be obtained by clicking a one-key calibration button.
To sum up, the utility model provides a calibration device is through all demarcating the back to every vision detection system, then remeasures the car light, can guarantee every vision detection system's detection uniformity to improve the accuracy of test result.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a calibration device, includes laser module and formation of image board, its characterized in that, be equipped with lens between laser module and the formation of image board, the laser module includes laser generator and roating seat, laser generator fixes on the roating seat, the roating seat rotationally installs on the fixing base, fixed motor on the fixing base, the roating seat by motor drive deflects.
2. The calibration device as claimed in claim 1, further comprising a support bar supporting the fixing base and a bearing plate fixedly mounted on the support bar, wherein the bearing plate is detachably mounted on the inspection table.
3. The calibration device as claimed in claim 2, wherein the lens is a fresnel lens, a center point of the fresnel lens is on a horizontal line with an axis of the laser generator in an initial state, a distance between the center of the fresnel lens and a light emitting point of the laser generator is 350mm, and a distance between the center of the fresnel lens and a center of the imaging plate is 700 mm.
4. The calibration device according to claim 3, wherein the laser generator is a cross laser generator, and the cross laser generator is model number TZL 2090.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920987231.4U CN210141980U (en) | 2019-06-28 | 2019-06-28 | Calibration device |
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| CN201920987231.4U CN210141980U (en) | 2019-06-28 | 2019-06-28 | Calibration device |
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| CN210141980U true CN210141980U (en) | 2020-03-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146855A (en) * | 2019-06-28 | 2020-12-29 | 常州星宇车灯股份有限公司 | Calibration method, calibration device and calibration system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146855A (en) * | 2019-06-28 | 2020-12-29 | 常州星宇车灯股份有限公司 | Calibration method, calibration device and calibration system |
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