CN209877892U - Calibration assembly of CCD (Charge coupled device) online size measurement system - Google Patents
Calibration assembly of CCD (Charge coupled device) online size measurement system Download PDFInfo
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- CN209877892U CN209877892U CN201920895092.2U CN201920895092U CN209877892U CN 209877892 U CN209877892 U CN 209877892U CN 201920895092 U CN201920895092 U CN 201920895092U CN 209877892 U CN209877892 U CN 209877892U
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Abstract
The utility model provides a calibration component of a CCD online size measurement system, which comprises a turntable and at least two standard devices; the CCD online size measuring system comprises a CCD camera and a control unit electrically connected with the CCD camera, and the turntable is rotatably arranged around the central axis of the turntable; the lens of the CCD camera faces the surface of one side of the turntable; the at least two standard devices are respectively arranged on one side, facing the CCD camera, of the rotary table, the at least two standard devices are arranged at intervals around the central axis of the rotary table, the end faces, far away from one side of the rotary table, of the at least two standard devices are respectively arranged in parallel and level, at least one standard size is respectively arranged on one side, far away from the rotary table, of the at least two standard devices, and the at least two standard devices sequentially pass through the shooting range of the CCD camera along with the rotation of the rotary table. The calibration assembly of the CCD online dimension measurement system can facilitate calibration.
Description
Technical Field
The utility model relates to an image calibration technical field, in particular to online size measurement system's of CCD calibration subassembly.
Background
In the field of manufacturing, a part product needs to be subjected to batch size measurement to verify whether the product meets the processing requirements. Dimensional measurement requires a measuring tool to perform, and the measuring tool can be generally classified into a contact measuring instrument and a noncontact measuring instrument. The CCD online image size measuring system belongs to one of non-contact image size measuring instruments, is widely applied to the size online measurement of intermediate products (semi-finished products and parts) on a production line of a large-scale production type enterprise, and needs to be calibrated before the CCD online size measuring system is put into production.
The calibration of the current CCD on-line dimension measurement system has the following problems: the standard parts used for calibration are different in distance from the CCD camera, so that each standard part needs to be refocused: when a plurality of standard parts are needed in one calibration item, the standard parts need to be taken and placed in the shooting range of the CCD camera for many times; when the same project is calibrated, if the placing directions of the standard devices with different sizes are disordered or the expected placing position result cannot be achieved, the reliability and the consistency of the calibration result are seriously influenced, and the condition that the position direction of the standard device generates obvious angle deviation is inevitable in the calibration process, so that the consistency and the reliability of the calibration are reduced; in addition, the work of the production line needs to be suspended in the online calibration, and a high-efficiency, accurate and automatic calibration device is needed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: a calibration assembly of a CCD online dimension measurement system with convenient calibration is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be:
a calibration assembly of a CCD (charge coupled device) online size measurement system comprises a turntable and at least two standards, wherein the CCD online size measurement system comprises a CCD camera and a control unit electrically connected with the CCD camera;
the rotating disc is rotatably arranged around the central axis of the rotating disc;
the lens of the CCD camera faces the surface of one side of the turntable;
at least two the etalon is located the carousel respectively and is towards one side of CCD camera, at least two the etalon sets up around the central axis interval of carousel, at least two the terminal surface of one side that the carousel was kept away from to the etalon sets up parallel and level respectively, and one side that the carousel was kept away from to at least two etalon is equipped with at least one standard size respectively, and at least two etalon loops through the shooting scope of CCD camera along with the rotation of carousel.
Furthermore, the device also comprises a driving motor, the driving motor is electrically connected with the control unit, and a power output shaft of the driving motor is connected with the center of the turntable and is coaxially arranged with the central axis of the turntable.
The CCD camera calibration device comprises a turntable, a CCD camera, at least two standard devices and at least two adjusting motors, wherein the CCD camera is arranged on the turntable, the at least two adjusting motors are respectively arranged on one side of the turntable, which is far away from the CCD camera, power output shafts of the adjusting motors penetrate through the turntable and extend to the other side of the turntable, the at least two adjusting motors are respectively and coaxially connected with the power output shafts of the at least two adjusting motors in a one-to-one correspondence manner, and the at least two standard devices are respectively and correspondingly sleeved on the at least two adjusting motors in;
at least two regulating motors are respectively and electrically connected with the control unit.
Furthermore, the magnetic ring and at least two groups of Hall sensing components are also included;
the magnetic ring is sleeved on a power output shaft of the driving motor, at least one group of Hall sensing assemblies are respectively arranged on at least one standard device in a one-to-one correspondence mode, and each Hall sensing assembly comprises a first Hall sensor, a second Hall sensor and a third Hall sensor;
the first Hall sensors are arranged on the corresponding positioning pins and are arranged coaxially with the positioning pins;
the second Hall sensor and the third Hall sensor are sequentially arranged along the circumferential direction of the turntable and are respectively arranged on two sides of the standard device.
Furthermore, the device also comprises an alarm unit which is electrically connected with the control unit.
The beneficial effects of the utility model reside in that:
(1) the different standard sizes used for calibrating the CCD online size measurement system on the standard device are equal to the distances between the CCD cameras, and the CCD cameras do not need to be focused again when the different standard sizes are used for calibration;
(2) the standard device required by a calibration item can be placed on the rotary table, repeated calibration is carried out by rotating the rotary table, frequent taking and placing of the standard device are avoided, and calibration accuracy is improved.
Drawings
Fig. 1 is a schematic structural diagram of a calibration assembly of a CCD online dimension measurement system according to an embodiment of the present invention;
fig. 2 is a top view of a turntable of a calibration assembly of a CCD in-line dimensional measurement system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of one of the etalons of the calibration assembly of the CCD in-line dimensional measurement system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a calibration assembly of a CCD in-line dimension measuring system according to an embodiment of the present invention in a standard deflection state;
description of reference numerals:
10. a turntable;
20. a CCD camera;
30. a standard device; 31. standard size;
41. a first Hall sensor; 42. a second Hall sensor; 43. a third Hall sensor;
50. a magnetic ring;
60. a control unit;
70. a drive motor;
80. the motor is regulated.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The utility model discloses the most crucial design lies in: the calibration is more convenient through the turntable and the standard, and meanwhile, the reset method is arranged to correct and compensate the offset, so that the reliability of the calibration assembly is improved.
Referring to fig. 1-4, a calibration assembly of a CCD on-line dimension measuring system includes a turntable 10 and at least two etalons 30, the CCD on-line dimension measuring system includes a CCD camera 20 and a control unit 60 electrically connected to the CCD camera 20;
the turntable 10 is rotatably arranged around the central axis of the turntable;
the lens of the CCD camera 20 faces the surface of one side of the turntable 10;
the at least two standard devices 30 are respectively arranged on one side, facing the CCD camera 20, of the rotary table 10, the at least two standard devices 30 are arranged at intervals around the central axis of the rotary table 10, the end faces, far away from one side of the rotary table 10, of the at least two standard devices 30 are respectively arranged in a flush mode, one side, far away from the rotary table 10, of the at least two standard devices 30 is respectively provided with at least one standard size 31, and the at least two standard devices 30 sequentially pass through the shooting range of the CCD camera 20 along with the rotation of the rotary table 10.
From the above description, the beneficial effects of the present invention are:
(1) the different standard sizes used for calibrating the CCD online size measurement system on the standard device are equal to the distances between the CCD cameras, and the CCD cameras do not need to be focused again when the different standard sizes are used for calibration;
(2) the standard device required by a calibration item can be placed on the rotary table, repeated calibration is carried out by rotating the rotary table, frequent taking and placing of the standard device are avoided, and calibration accuracy is improved.
Further, the turntable 10 further comprises a driving motor 70, the driving motor 70 is electrically connected with the control unit 60, and a power output shaft of the driving motor 70 is connected with the center of the turntable 10 and is coaxially arranged with the central axis of the turntable 10.
Further, the device comprises at least two adjusting motors 80 and at least two positioning pins, wherein the at least two adjusting motors 80 are respectively arranged on one side of the turntable 10 away from the CCD camera 20, power output shafts of the adjusting motors 80 penetrate through the turntable 10 and extend to the other side of the turntable 10, the at least two positioning pins are respectively and coaxially connected with the power output shafts of the at least two adjusting motors 80 in a one-to-one correspondence manner, and the at least two etalons 30 are respectively and correspondingly sleeved on the at least two positioning pins;
at least two of the adjustment motors 80 are electrically connected to the control unit 60.
As can be seen from the above description, the standard 30 is integrated on the platform of the automatic calibration device, and it is inevitable that the position and direction of the standard 30 have a significant angular deviation during the calibration process, which may result in the consistency and reliability of the calibration being reduced, and the adjustment motor 80 may be arranged to rotate the angle of the standard 30 during the calibration process, thereby ensuring the reliability and consistency of the calibration.
Further, the sensor also comprises a magnetic ring 50 and at least two groups of Hall sensing components;
the magnetic ring 50 is sleeved on the power output shaft of the driving motor 70, at least one group of hall sensing assemblies are respectively arranged on at least one standard device 30 in a one-to-one correspondence manner, and each hall sensing assembly comprises a first hall sensor 41, a second hall sensor 42 and a third hall sensor 43;
the first hall sensors 41 are arranged on the corresponding positioning pins and are arranged coaxially with the positioning pins;
the second hall sensor 42 and the third hall sensor 43 are sequentially arranged along the circumferential direction of the turntable 10 and are respectively arranged at two sides of the standard device 30.
Further, the device also comprises an alarm unit which is electrically connected with the control unit 60.
As can be seen from the above description, an alarm is generated when the control unit 60 detects a deviation in the position of the standard 30.
Example one
The embodiment provides a calibration assembly of a CCD online dimension measurement system, as shown in FIG. 1-2, comprising a turntable 10, a standard device 30, a Hall sensing assembly, a magnetic ring 50, a driving motor 70, an adjusting motor 80 and an alarm unit;
the CCD online size measuring system comprises a CCD camera 20 and a control unit 60 electrically connected with the CCD camera 20, wherein the control unit 60 is also electrically connected with an alarm unit, a driving motor 70 and an adjusting motor 80;
the power output shaft of the driving motor 70 is connected with the center of the turntable 10 and is coaxially arranged with the central axis of the turntable 10, the control unit 60 controls the driving motor 70 to drive the turntable 10 to be rotatably arranged around the central axis of the control unit, and the magnetic ring 50 is sleeved on the power output shaft of the driving motor 70;
the lens of the CCD camera 20 faces the surface of one side of the turntable 10;
the adjusting motor 80 is arranged on one side of the turntable 10 far away from the CCD camera 20, a power output shaft of the adjusting motor 80 penetrates through the turntable 10 and extends to the other side of the turntable 10, a positioning pin is arranged on the power output shaft of the adjusting motor 80, and the positioning pin and the power output shaft of the adjusting motor 80 are coaxially arranged;
at least two etalons 30 may be used in calibrating the CCD in-line sizing system. The standard devices 30 are respectively sleeved on different positioning pins, and the end surfaces of the standard devices 30 far away from one side of the rotary table 10 are respectively arranged in a flush manner.
Each of the standards 30 is provided with at least one standard dimension 31 on a side thereof away from the turntable 10, as shown in fig. 3, the standard 30 is a diameter measurement error calibration standard, and includes three diameter standard dimensions, and in addition to the diameter measurement error calibration standard, an angle measurement error calibration standard, a radian measurement error calibration standard, and the like can be used.
Preferably, at least two of the standards 30 are arranged at intervals around the central axis of the turntable 10, and the at least two standards 30 sequentially pass through the shooting range of the CCD camera 20 along with the rotation of the turntable 10.
Preferably, after the standard 30 is placed at a preset angle, the standard 30 is temporarily pressed.
As shown in fig. 1, each of the etalons 30 is provided with a group of hall sensing assemblies, which include a first hall sensor 41, a second hall sensor 42 and a third hall sensor 43;
the first hall sensors 41 are arranged on the corresponding positioning pins and are arranged coaxially with the positioning pins;
the second hall sensor 42 and the third hall sensor 43 are sequentially arranged along the circumferential direction of the turntable 10 and are respectively arranged at two sides of the standard device 30. Preferably, the first hall sensor 41, the second hall sensor 42, the third hall sensor 43 and the magnetic ring 50 are equal to each other in distance from the turntable 50 in the vertical direction of the turntable 50;
in order to deal with the condition that the direction angle of the individual standard device is obviously deviated in the transportation and calibration process, the embodiment adopts a resetting method of the calibration component of the CCD online dimension measurement system, which comprises the following steps: acquiring the rotating angle around a positioning pin between the position of a standard device 30 currently positioned in the range of the CCD camera and the position of the standard device 30 when the standard device is placed on the turntable 10, and recording the rotating angle as a deflection angle alpha;
the adjustment motor 80 drives the standard 30 to rotate in the opposite direction of the deflection angle, which is equal to the deflection angle α.
The resetting method can correct the angle of each standard device 30 entering the shooting range of the CCD camera to restore the preset placing angle, so as to ensure the accurate value of the calibration result.
Example two
In a second embodiment, the method for obtaining the deflection angle α includes the following steps:
measuring the distance between the positioning pin and the magnetic ring 50 and recording as A;
placing the standard 30 on the turntable 10;
the first hall sensor 41 or the second hall sensor 42 is used to measure the distance between the first hall sensor 41 and the second hall sensor 42 at this time, which is marked as B1；
Using the first Hall sensorThe sensor 41 or the third hall sensor 43 measures the distance, denoted B, between the first hall sensor 41 and the third hall sensor 43 at this time2；
The second hall sensor 42 is used to measure the distance between the second hall sensor 42 and the magnetic ring 50 at this time, which is marked as C1；
The third hall sensor 43 measures the distance between the third hall sensor 43 and the magnetic ring 50 at this time, which is marked as C2；
Rotating the turntable 10 to rotate the standard device 30 to the range of the CCD camera;
the second hall sensor 42 measures the distance between the second hall sensor 42 and the magnetic ring 50 at this time, which is recorded as D1；
The third hall sensor 43 measures the distance between the third hall sensor 43 and the magnetic ring 50 at this time, which is recorded as D2；
Measuring the distance between the first hall sensor 41 and the magnetic ring 50 by using the first hall sensor 41, wherein the distance is marked as a;
calculating to obtain a compensation coefficient K, wherein the compensation coefficient K is as follows: a/A;
according to the compensation coefficient K and the measured distance B1、B2、C1、C2、D1And D2Calculating to obtain a corrected distance b1、b2、c1、c2、d1And d2；
B is1Comprises the following steps: k B1；
B is2Comprises the following steps: k B2；
C is mentioned1Comprises the following steps: k C1；
C is mentioned2Comprises the following steps: k C2；
D is1Comprises the following steps: k X D1；
D is2Comprises the following steps: k X D2。
As shown in fig. 4, the etalon 30 is placed on the turntable 10, and the connection between the first hall sensor 41 and the magnetic ring 50 and the connection between the first hall sensor 41 and the second hall sensor 42 are providedThe included angle between the lines is a first included angle gamma1；
An included angle between a connecting line between the first hall sensor 41 and the magnetic ring 50 and a connecting line between the first hall sensor 41 and the third hall sensor 43 is a third included angle γ2；
And the standard device 30 rotates along with the rotation of the turntable 50, the standard device 30 rotates to the range of the CCD camera, and the included angle between the connecting line between the first Hall sensor 41 and the magnetic ring 50 and the connecting line between the first Hall sensor 41 and the second Hall sensor 42 is a second included angle beta1；
An included angle between a connecting line between the first hall sensor 41 and the magnetic ring 50 and a connecting line between the first hall sensor 41 and the third hall sensor 43 is a fourth included angle β2；
The control unit 60 can obtain the first included angle γ by using the cosine law1The calculation formula is as follows:
similarly, the control unit 60 can respectively calculate the second included angles β according to the cosine law1And the third included angle gamma2And a fourth angle of inclusion beta2；
The deflection angle α is: (| beta)1—γ1|+|β2—γ2|)/2。
To sum up, the utility model provides a convenient online size measurement system's of CCD calibration subassembly. The calibration assembly of the CCD on-line dimension measurement system can calibrate multiple items at a time without refocusing.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (5)
1. A calibration assembly of a CCD online size measurement system comprises a CCD camera and a control unit electrically connected with the CCD camera, and is characterized by comprising a turntable and at least two standard devices;
the rotating disc is rotatably arranged around the central axis of the rotating disc;
the lens of the CCD camera faces the surface of one side of the turntable;
at least two the etalon is located the carousel respectively and is towards one side of CCD camera, at least two the etalon sets up around the central axis interval of carousel, at least two the terminal surface of one side that the carousel was kept away from to the etalon sets up parallel and level respectively, and one side that the carousel was kept away from to at least two etalon is equipped with at least one standard size respectively, and at least two etalon loops through the shooting scope of CCD camera along with the rotation of carousel.
2. The calibration assembly of the CCD online dimension measurement system as claimed in claim 1, further comprising a driving motor electrically connected to the control unit, wherein a power output shaft of the driving motor is connected to the center of the turntable and is coaxially disposed with the central axis of the turntable.
3. The calibration assembly of the on-line CCD dimension measuring system of claim 2, further comprising at least two adjusting motors and at least two positioning pins, wherein the at least two adjusting motors are respectively arranged on one side of the turntable away from the CCD camera, power output shafts of the adjusting motors penetrate through the turntable and extend to the other side of the turntable, the at least two positioning pins are respectively coaxially connected with the power output shafts of the at least two adjusting motors in a one-to-one correspondence manner, and the at least two etalons are respectively sleeved on the at least two positioning pins in a one-to-one correspondence manner;
at least two regulating motors are respectively and electrically connected with the control unit.
4. The calibration assembly of a CCD in-line dimension measurement system of claim 3, further comprising a magnetic ring and at least two sets of hall sensing assemblies;
the magnetic ring is sleeved on a power output shaft of the driving motor, at least one group of Hall sensing assemblies are respectively arranged on at least one standard device in a one-to-one correspondence mode, and each Hall sensing assembly comprises a first Hall sensor, a second Hall sensor and a third Hall sensor;
the first Hall sensors are arranged on the corresponding positioning pins and are arranged coaxially with the positioning pins;
the second Hall sensor and the third Hall sensor are sequentially arranged along the circumferential direction of the turntable and are respectively arranged on two sides of the standard device.
5. The calibration assembly of a CCD on-line dimension measurement system of claim 4, further comprising an alarm unit electrically connected to the control unit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095072A (en) * | 2019-06-14 | 2019-08-06 | 厦门市计量检定测试院 | The calibration assemblies and its repositioning method of the online Size Measuring System of CCD |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095072A (en) * | 2019-06-14 | 2019-08-06 | 厦门市计量检定测试院 | The calibration assemblies and its repositioning method of the online Size Measuring System of CCD |
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