CN217442423U

CN217442423U - Calibration jig

Info

Publication number: CN217442423U
Application number: CN202123227981.8U
Authority: CN
Inventors: 杨波; 刘通; 易伟; 方金桂
Original assignee: Ningbo Hanyu Intelligent Technology Co ltd
Current assignee: Ningbo Hanyu Intelligent Technology Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-09-16
Anticipated expiration: 2031-12-21

Abstract

The utility model discloses a mark tool belongs to the manufacturing technology field, a mark tool, including marking the tool, the upper surface of marking the tool is provided with the benchmark hole, the both sides of just being located the benchmark hole on the mark tool are provided with the fixed orifices, the both ends of marking the tool upper surface are provided with the demarcation hole, mark the hole including marking hole one and marking hole two, mark the one end that keeps away from the benchmark hole on the hole one is located the demarcation tool, mark hole two and be close to the one end in benchmark hole on the mark tool, the distance of marking the centre of a circle of hole to the centre of a circle of benchmark hole is S1, the distance of marking the centre of a circle of hole two to the centre of a circle of benchmark hole is S2, mark tool fixed connection and move and carry the structure and include the connecting plate. The utility model discloses theoretical position and actual position between the camera that can mark and calibrate a plurality of vision camera equipment improve equipment's precision.

Description

Calibration jig

Technical Field

The utility model relates to a manufacturing technical field, more specifically say, relate to a calibration jig.

Background

With the rapid development of the visual technology, the application of the equipment to the visual technology is more and more extensive, and one or more visual modules are installed on many pieces of equipment due to different requirements, but certain errors exist in the actual installation position and the designed theoretical installation position of the visual modules due to assembly errors, machining errors and the like, and the accuracy of the equipment is greatly reduced due to the existence of the errors.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a mark tool, theoretical position and actual position between the camera that it can mark and calibrate a plurality of vision camera equipment improve equipment's precision.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides a mark tool, is including marking the tool, the upper surface of marking the tool is provided with the benchmark hole, the both sides that just are located the benchmark hole on the tool of demarcation are provided with the fixed orifices, the both ends of marking the tool upper surface are provided with marks the hole.

Furthermore, the calibration hole comprises a first calibration hole and a second calibration hole, the first calibration hole is located at one end, far away from the reference hole, of the calibration jig, and the second calibration hole is located at one end, close to the reference hole, of the calibration jig.

Further, the distance from the center of the first calibrated hole to the center of the reference hole is S1, and the distance from the center of the second calibrated hole to the center of the reference hole is S2.

Further, mark tool fixed connection and move and carry structurally, it includes the connecting plate to move the structure, the connecting plate is located the below of demarcating the tool, the last fixed surface of connecting plate is connected with support frame and camera one, camera one is located the benchmark hole under, support frame upper end sliding connection has camera two and camera three, the middle part swing joint of support frame has drive arrangement, drive arrangement's lower extreme is provided with the aircraft nose center pin, fixedly connected with support frame on the aircraft nose center pin, the support frame passes through the fixed orifices and marks tool fixed connection.

Further, the distance from the center of the second camera to the center of the first calibration hole is X1, the distance from the center of the third camera to the center of the second calibration hole is X2, the distance from the center of the second camera to the center of the reference hole is X3, the distance from the center of the third camera to the center of the reference hole is X4, and the center of the reference hole coincides with the center of the first camera.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) the tool is markd through setting up to this scheme, utilizes and marks tool cooperation camera one, camera two and camera and calibrates equipment, greatly improves the operation precision of machine, guarantees the production efficiency of product, reduces the debugging number of times of equipment.

(2) The jig is simple in structure and convenient to calibrate.

(3) The jig has strong compatibility, and the length of the calibration jig can be changed according to the actual distance, so that the jig is suitable for calibration of different distances.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a working diagram of the present invention.

The reference numbers in the figures illustrate:

1. calibrating a jig; 2. a reference hole; 3. a fixing hole; 401. calibrating a first hole; 402. calibrating a second hole; 5. a second camera; 6. a third camera; 7. a drive device; 8. a machine head central shaft; 9. a support frame; 10. a connecting plate; 11. and a first camera.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

Example 1:

referring to fig. 1-2, a calibration jig comprises a calibration jig 1, a reference hole 2 is formed in the upper surface of the calibration jig 1, fixing holes 3 are formed in the calibration jig 1 and located on two sides of the reference hole 2, and calibration holes are formed in two ends of the upper surface of the calibration jig 1.

Referring to fig. 1, the calibration hole includes a first calibration hole 401 and a second calibration hole 402, the first calibration hole 401 is located at one end of the calibration jig 1 far from the reference hole 2, and the second calibration hole 402 is located at one end of the calibration jig 1 near the reference hole 2.

Referring to fig. 1, the distance from the center of the first calibrated hole 401 to the center of the reference hole 2 is S1, and the distance from the center of the second calibrated hole 402 to the center of the reference hole 2 is S2.

Referring to fig. 2, the calibration jig 1 is fixedly connected to the transfer structure, the transfer structure includes a connecting plate 10, the connecting plate 10 is located below the calibration jig 1, a supporting frame 9 and a first camera 11 are fixedly connected to the upper surface of the connecting plate 10, the first camera 11 is located right below the reference hole 2, a second camera 5 and a third camera 6 are slidably connected to the upper end of the supporting frame 9, a driving device 7 is movably connected to the middle of the supporting frame 9, the driving device 7 can drive the calibration jig 1 to move in multiple directions, a head central shaft 8 is arranged at the lower end of the driving device 7, the supporting frame 9 is fixedly connected to the head central shaft 8, the supporting frame 9 is fixedly connected to the calibration jig 1 through a fixing hole 3, the transverse movement of the second camera 5 and the third camera 6 is set as an X-axis, and the longitudinal direction in the same horizontal plane as the X-axis is set as a Y-axis, the calibration jig 1 is used in cooperation with the first camera 11, The second camera 5 and the third camera 3 calibrate the equipment, so that the running precision of the machine is greatly improved, the production efficiency of products is ensured, and the debugging frequency of the equipment is reduced.

Referring to fig. 1 and 2, the distance from the center of the second camera 5 to the center of the first calibration hole 401 is X1, the distance from the center of the third camera 6 to the center of the second calibration hole 402 is X2, the distance from the center of the second camera 5 to the center of the reference hole 2 is X3, the distance from the center of the third camera 6 to the center of the reference hole 2 is X4, and the center of the reference hole 2 coincides with the center of the first camera 11.

The working principle is as follows: the calibration process is carried out on the premise that the positions of the first camera 11, the second camera 5, the third camera 6 and the handpiece central shaft 8 in the Y-axis direction are the same.

X3: in an ideal state, when the reference hole 2 of the calibration jig 1 on the handpiece central shaft 8 and the central point of the first camera 11 are completely coincident, the theoretical distance from the center of the first camera 11 to the center of the second camera 5 is obtained.

X4: in an ideal state, when the reference hole 2 of the calibration jig 1 on the handpiece central shaft 8 and the central point of the first camera 11 are completely coincident, the theoretical distance from the center of the first camera 11 to the center of the third camera 6 is obtained.

S1: the distance from the reference hole 2 of the calibration jig 1 to the first calibration hole 401 can be accurately measured.

S2: the distance from the reference hole 2 of the calibration jig 1 to the second calibration hole 402 can be accurately measured.

X1 ═ X3-S1: under the ideal state, when the reference hole 2 of the calibration jig 1 on the head central shaft 8 completely coincides with the central point of the first camera 11, the distance between the first calibration hole 401 of the calibration jig 1 and the center of the second camera 5 is X1.

X2 ═ X4-S2: under the ideal state, when the reference hole 2 of the calibration jig 1 on the head central shaft 8 completely coincides with the central point of the first camera 11, the distance between the second calibration hole 402 of the calibration jig 1 and the center of the third camera 6 is X2.

1. The calibration jig 1 is fixed to the head central shaft 8 so that the reference hole 2 of the calibration jig 1 coincides with the center of the head central shaft 8.

2. The machine head central shaft 8 is moved through the motor X axis, the reference hole 2 of the calibration jig 1 fixed on the machine head central shaft 8 is aligned to the central point of the first camera 11, the first camera 11 shoots the reference hole 2 of the calibration jig 1, the error between the two in the X axis direction is measured and calculated, and the control system adjusts the motor X axis according to the error to enable the centers of the two to be completely overlapped.

3. The motor X-axis drives the handpiece central shaft 8 to move X1 leftwards, and at the moment, the calibration hole I401 of the calibration jig 1 and the center of the camera II 5 are theoretically overlapped. The second camera 5 takes a picture of the first calibration hole 401 of the lower calibration jig 1, and the actual difference value t1 between the centers of the first calibration hole 401 and the second camera 5 is measured. If the center of the first actual calibration hole 401 is located on the left side of the center of the second camera 5, the actual distance S12 between the first camera 11 and the second camera 5 is S1+ X1-t 1. If the center of the first actual calibration hole 401 is located on the right side of the center of the second camera 5, the actual distance S12 between the first camera 11 and the second camera 5 is S1+ X1+ t 1.

4. And moving the machine head central shaft 8 through the motor X axis again to enable the reference hole 2 of the calibration jig 1 fixed on the machine head central shaft 8 to be aligned to the central point of the first camera 11, taking a picture of the reference hole 2 of the calibration jig 1 by the first camera 11, measuring and calculating the error between the two in the X axis direction, and adjusting the motor X axis by the control system according to the error to enable the centers of the two to be completely overlapped.

5. The motor X-axis drives the headstock central shaft 8 to move to the right by X2, and at the moment, the centers of the calibration hole II 402 of the calibration jig 1 and the camera III 6 are theoretically coincident. The camera three 6 takes a picture of the calibration hole two 402 of the calibration jig 1 below, and the actual difference value t2 between the centers of the calibration hole two 402 and the camera three 6 is measured. If the center position of the actual calibration hole two 402 is left of the center of the camera three 6, the actual distance S13 between the camera one 11 and the camera three 6 is S2+ X2+ t 2. If the center position of the actual calibration hole two 402 is right of the center of the camera three 6, the actual distance S13 of the camera one 11 with respect to the camera three 6 is S2+ X2-t 1.

6. From the above steps, the actual distance S12 between the first camera 11 and the second camera 5 and the actual distance S13 between the first camera 11 and the third camera 6 can be calibrated and measured, and the values S12 and S13 can be substituted into the motion control system.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a calibration jig, includes calibration jig (1), its characterized in that: the upper surface of the calibration jig (1) is provided with a reference hole (2), two sides of the calibration jig (1) which are located at the reference hole (2) are provided with fixing holes (3), and two ends of the upper surface of the calibration jig (1) are provided with calibration holes.

2. The calibration jig of claim 1, wherein: the calibration hole comprises a first calibration hole (401) and a second calibration hole (402), the first calibration hole (401) is located at one end, far away from the reference hole (2), of the calibration jig (1), and the second calibration hole (402) is located at one end, close to the reference hole (2), of the calibration jig (1).

3. The calibration jig of claim 2, wherein: the distance from the circle center of the first calibrated hole (401) to the circle center of the reference hole (2) is S1, and the distance from the circle center of the second calibrated hole (402) to the circle center of the reference hole (2) is S2.

4. The calibration jig of claim 1, wherein: demarcate tool (1) fixed connection and move and carry structurally, it includes connecting plate (10) to move and carry the structure, connecting plate (10) are located the below of demarcating tool (1), the last fixed surface of connecting plate (10) is connected with support frame (9) and camera (11), camera (11) are located benchmark hole (2) under, support frame (9) upper end sliding connection has camera two (5) and camera three (6), the middle part swing joint of support frame (9) has drive arrangement (7), the lower extreme of drive arrangement (7) is provided with aircraft nose center pin (8), fixedly connected with support frame (9) on aircraft nose center pin (8), support frame (9) are through fixed orifices (3) and demarcation tool (1) fixed connection.

5. The calibration jig of claim 4, wherein: the distance from the circle center of the second camera (5) to the circle center of the first calibration hole (401) is X1, the distance from the circle center of the third camera (6) to the circle center of the second calibration hole (402) is X2, the distance from the circle center of the second camera (5) to the circle center of the reference hole (2) is X3, the distance from the circle center of the third camera (6) to the circle center of the reference hole (2) is X4, and the circle center of the reference hole (2) is overlapped with the circle center of the first camera (11).