Optical passive device angle control method through combination of high-precision electric adjusting frame and visual identification

Abstract

The invention relates to the technical field of laser assembly, and provides an optical passive device angle control method through combination of a high-precision electric adjusting frame and visual identification, and the method comprises the following steps: S1, a laser housing, an electric adjusting frame and a material placing disc are all installed on an assembly table; s2, placing the optical passive device on a material placing disc; s3, installing an industrial visual camera; s4, sucking the optical passive device by a suction nozzle of the electric adjusting frame; s5, the industrial vision camera shoots the optical passive device; s6, the industrial control device analyzes postures such as a pitch angle and a swing angle of the optical passive device in the image; s7, the industrial control device compares the measured angle with the standard angle range; and S8, if the comparison result meets the process requirement, finishing angle adjustment, otherwise, returning to S6 to carry out loop iteration. The technical scheme of the invention has the beneficial effects that the angle of the optical passive device is adjusted to a standard angle range in a high-precision and high-efficiency manner, and the consistency of products is improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser assembly, and in particular to an optical passive device angle control method by combining a high-precision electric adjustment frame with visual recognition. Background Art

[0002] During the laser assembly process, the placement angle of the optical passive components in the laser housing will greatly affect the laser performance indicators, so the angle control requirements of the optical passive components will be very high during the production process. Optical passive components include reflectors, etalons, etc.

[0003] The traditional manual angle adjustment method is to use a manual adjustment frame to absorb the optical passive device from the material placement tray, and then the staff will adjust the angle of the optical passive device by looking at the scale with the naked eye, and finally place the adjusted optical passive device on the laser housing and fix the optical passive device with optical glue. However, the manual adjustment frame has problems of idle travel and insufficient precision, the efficiency of manual angle adjustment is low, and the consistency of the assembled laser product cannot be guaranteed.

[0004] Therefore, the technical field urgently needs an optical passive device angle control method using a high-precision electric adjustment frame combined with visual recognition to improve the accuracy, efficiency and consistency of the angle adjustment. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an optical passive device angle control method by combining a high-precision electric adjustment frame with visual recognition, so as to improve the accuracy, efficiency and consistency of the angle adjustment.

[0006] The present invention is implemented as follows: a method for controlling the angle of an optical passive device by combining a high-precision electric adjustment frame with visual recognition, comprising the following steps:

[0007] S1, laser housing, electric adjustment frame, and material placement tray are all installed on the assembly table;

[0008] S2, placing the optical passive component on the material placement tray;

[0009] S3, installing an industrial vision camera above the material placement tray;

[0010] S4, the suction nozzle of the electric adjustment frame first returns to the initial position, then sucks the optical passive component from the material placement tray, and then aligns the optical passive component with the industrial vision camera;

[0011] S5, the industrial visual camera photographs the optical passive device, and then sends the photographed image to the industrial control device;

[0012] S6, the industrial control device analyzes the posture of the optical passive component in the image, calculates the current angle of the optical passive component, and records it as the measurement angle;

[0013] S7, the industrial control device pre-stores a standard angle range, and the industrial control device compares the measured angle with the standard angle range. When the measured angle is within the standard angle range, the process goes to S8; when the measured angle is outside the standard angle range, the industrial control device sends an angle fine-tuning signal to the electric adjustment frame, and the suction nozzle of the electric adjustment frame automatically adjusts the angle of the optical passive component, and the process goes to S5;

[0014] S8. After the angle adjustment is completed, the suction nozzle of the electric adjustment frame places the optical passive component on the laser housing.

[0015] Furthermore, the suction nozzle of the electric adjustment frame can translate along the spatial X-axis, Y-axis, and Z-axis, and can also rotate around the spatial X-axis, Y-axis, and Z-axis.

[0016] Furthermore, the current angle of the optical passive component includes a pitch angle and a roll angle.

[0017] Further, in S7, after the electric adjustment frame receives the angle fine-tuning signal, the angle adjustment variation of the optical passive component is 0.1°.

[0018] Furthermore, the optical passive component is a reflector or an etalon.

[0019] Compared with the background technology, the technical solution of the present invention has the following beneficial effects:

[0020] The electric adjustment frame is used to replace the manual adjustment frame to adjust the angle of the optical passive device with high precision. The industrial visual camera replaces the human eye to detect the angle change of the optical passive device in real time, and efficiently adjust the angle of the optical passive device to the standard angle range to meet the assembly process requirements of the laser. It has a high degree of automation, reduces assembly deviations caused by manual operation, improves production yield, and improves the accuracy, efficiency, and consistency of angle adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0022] Figure 1 It is an execution flow chart of the optical passive device angle control method by combining a high-precision electric adjustment frame with visual recognition according to the present invention.

[0023] Figure 2 It is a schematic diagram of the positions of the laser housing, the electric adjustment frame, and the industrial vision camera in the present invention.

[0024] Figure 3 It is a schematic diagram of the positions of the laser housing, the electric adjustment frame, and the material placement tray in the present invention.

[0025] Figure 4 It is a schematic diagram of the position of the suction nozzle on the electric adjustment frame in the present invention.

[0026] Figure 5 It is a schematic diagram of the position of the optical passive component on the material placement tray in the present invention.

[0027] Figure 6 It is a schematic diagram of the angle adjustment of the optical passive device in the present invention.

[0028] Reference numerals: laser housing 1; electric adjustment frame 2; suction nozzle 21; material placement tray 3; optical passive component 4; industrial vision camera 5; industrial control device 6; assembly table 7. DETAILED DESCRIPTION

[0029] The embodiment of the present invention provides a method for controlling the angle of an optical passive component by combining a high-precision electric adjustment frame with visual recognition, which overcomes the disadvantages of the background technology that workers operate a manual adjustment frame and adjust the angle of the optical passive component by looking at the scale with the naked eye; and achieves the technical effect of improving the accuracy and efficiency of angle adjustment and the consistency of products.

[0030] The overall idea of ​​the technical solution of the embodiment of the present invention is as follows:

[0031] An electric adjustment frame, a material placement tray, an industrial vision camera and an industrial control device are installed on the assembly table. The optical passive device is first placed on the material placement tray. The suction nozzle of the electric adjustment frame moves to the initial position first and sucks the optical passive device from the material placement tray. The industrial vision camera monitors the optical passive device and feeds the image back to the industrial control device. The industrial control device analyzes the posture of the optical passive device in the image through a visual recognition algorithm, calculates the current angle of the optical passive device, and records it as the measurement angle. Before assembly, the staff inputs the standard angle range into the industrial control device in advance. The industrial control device compares the measurement angle with the standard angle range, and then sends an angle fine-tuning signal to the electric adjustment frame to automatically adjust the angle of the optical passive device. Finally, the suction nozzle of the electric adjustment frame places the optical passive device on the laser housing.

[0032] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] See also Figures 1 to 6 , a preferred embodiment of the present invention.

[0034] A method for controlling the angle of an optical passive device by combining a high-precision electric adjustment frame with visual recognition comprises the following steps:

[0035] S1, laser housing 1, electric adjustment frame 2, and material placement tray 3 are all installed on the assembly table 7;

[0036] S2, placing the optical passive component 4 on the material placement tray 3;

[0037] S3, installing an industrial vision camera 5 above the material placement tray 3;

[0038] S4, the suction nozzle 21 of the electric adjustment frame 2 first returns to the initial position, then sucks the optical passive component 4 from the material placement tray 3, and then aligns the optical passive component 4 with the industrial vision camera 5;

[0039] S5, the industrial visual camera 5 photographs the optical passive device 4, and then sends the photographed image to the industrial control device 6;

[0040] S6, the industrial control device 6 analyzes the posture of the optical passive component 4 in the image, calculates the current angle of the optical passive component 4, and records it as the measurement angle;

[0041] S7, the industrial control device 6 stores a standard angle range in advance, and the industrial control device 6 compares the measured angle with the standard angle range. When the measured angle is within the standard angle range, the process goes to S8; when the measured angle is outside the standard angle range, the industrial control device 6 sends an angle fine-tuning signal to the electric adjustment frame 2, and the suction nozzle 21 of the electric adjustment frame 2 automatically adjusts the angle of the optical passive component 4, and the process goes to S5;

[0042] S8 , after the angle adjustment is completed, the suction nozzle 21 of the electric adjustment frame 2 places the optical passive component 4 on the laser housing 1 .

[0043] The beneficial effects of the technical solution of the present invention are: an electric adjustment frame 2 is used to replace the manual adjustment frame to adjust the angle of the optical passive device 4 with high precision, an industrial visual camera 5 replaces the human eye to detect the angle change of the optical passive device 4 in real time, and the angle of the optical passive device 4 is efficiently adjusted to the standard angle range, meeting the assembly process requirements of the laser, with a high degree of automation, reducing assembly deviations caused by manual operation, improving production yield, and improving product consistency.

[0044] When the measured angle is within the standard angle range, the comparison result satisfies the process requirements; when the measured angle is outside the standard angle range, the process requirements are not met, and the loop iteration is returned.

[0045] Furthermore, the suction nozzle 21 of the electric adjustment frame 2 can translate along the spatial X-axis, Y-axis, and Z-axis, and can also rotate around the spatial X-axis, Y-axis, and Z-axis.

[0046] The beneficial effects of this technical solution are: more comprehensive adjustment of the angles on the optical passive components and improved assembly accuracy.

[0047] One structure of the electric adjustment frame 2 includes a plurality of servo motors, which serve as drivers to change the position of the suction nozzle 21 .

[0048] Furthermore, the current angle of the optical passive component includes a pitch angle and a roll angle.

[0049] Further, in S7, after the electric adjustment frame 2 receives the angle fine-tuning signal, the angle adjustment variation of the optical passive component 4 is 0.1°.

[0050] The beneficial effects of this technical solution are as follows: the optical passive device 4 changes its angle by 0.1° each time, with high precision. When the measured angle of the optical passive device 4 is smaller than the standard angle range, the suction nozzle 21 of the electric adjustment frame 2 gradually rotates the optical passive device 4 in a positive angle by 0.1° until the measured angle of the optical passive device 4 is within the standard angle range; when the measured angle of the optical passive device 4 is larger than the standard angle range, the electric adjustment frame 2 gradually rotates the optical passive device 4 in a negative angle by 0.1° until the measured angle of the optical passive device 4 is within the standard angle range.

[0051] Furthermore, the passive optical device 4 is a reflector or an etalon.

[0052] Working principle of the present invention:

[0053] Taking the assembly of a reflector in a laser housing as an example, the assembly process requires that the reflector angle must be 90°, and the qualified range is ±0.1°, that is, the range of 89.9°-90.1° is the standard angle range, and exceeding this range is unqualified. The standard angle range is input into the industrial control device 6, and then the angle adjustment change of 0.1° is input into the industrial control device 6, and the industrial control device 6 can be an industrial computer of the prior art.

[0054] The electric adjustment frame 2, the laser housing 1, and the material placement tray 3 are all installed on the assembly table 7. The reflector to be assembled is first placed on the material placement tray 3, so that the material placement tray 3 can be in the same initial state when the reflector is loaded; the industrial visual camera 5 is aimed at the reflector, and the suction nozzle 21 of the electric adjustment frame 2 returns to the initial position first, and the suction nozzle 21 is above the material placement tray 3, and then a reflector is sucked from the material placement tray 3. For example, at this time, the image signal taken by the industrial visual camera 5 is fed back to the industrial control device 6, and the industrial control device 6 runs the software of the visual recognition algorithm to analyze the posture of the reflector in the image and calculates that the measured angle θ of the reflector is 90.4°. The industrial control device 6 compares and finds that 90.4° is greater than the standard angle range, so the industrial control device 6 sends an angle fine-tuning signal to the electric adjustment frame 2, and the electric adjustment frame 2 gradually reduces the angle of the reflector by 0.1°. When it finally becomes 90.1°, the industrial control device 6 stops sending the angle fine-tuning signal to the electric adjustment frame 2. The angle adjustment is completed. Finally, the suction nozzle 21 of the electric adjustment frame 2 places the optical passive component 4 on the laser housing 1, and optical glue is used to fix the optical passive component 4 and the laser housing 1. The suction nozzle 21 of the electric adjustment frame 2 returns to the initial position to continue the assembly work of the next reflector.

[0055] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A method for controlling the angle of an optical passive device by combining a high-precision electric adjustment frame with visual recognition, characterized in that: The following steps are involved: S1, laser housing, electric adjustment frame, and material placement tray are all installed on the assembly table; S2, placing the optical passive component on the material placement tray; S3, installing an industrial vision camera above the material placement tray; S4, the suction nozzle of the electric adjustment frame first returns to the initial position, then sucks the optical passive component from the material placement tray, and then aligns the optical passive component with the industrial vision camera; S5, the industrial visual camera photographs the optical passive device, and then sends the photographed image to the industrial control device; S6, the industrial control device analyzes the posture of the optical passive component in the image, calculates the current angle of the optical passive component, and records it as the measurement angle; S7, the industrial control device pre-stores a standard angle range, and the industrial control device compares the measured angle with the standard angle range. When the measured angle is within the standard angle range, the process goes to S8; when the measured angle is outside the standard angle range, the industrial control device sends an angle fine-tuning signal to the electric adjustment frame, and the suction nozzle of the electric adjustment frame automatically adjusts the angle of the optical passive component, and the process goes to S5; S8. After the angle adjustment is completed, the suction nozzle of the electric adjustment frame places the optical passive component on the laser housing.

2. The method for controlling the angle of an optical passive device by combining a high-precision electric adjustment frame with visual recognition according to claim 1, characterized in that: The suction nozzle of the electric adjustment frame can translate along the spatial X-axis, Y-axis and Z-axis, and can also rotate around the spatial X-axis, Y-axis and Z-axis.

3. The method for controlling the angle of an optical passive device by combining a high-precision electric adjustment frame with visual recognition according to claim 1, characterized in that: The current angle of the optical passive device includes a pitch angle and a roll angle.

4. The method for controlling the angle of an optical passive device by combining a high-precision electric adjustment frame with visual recognition according to claim 1, characterized in that: In S7, after the electric adjustment frame receives the angle fine-tuning signal, the angle adjustment variation of the optical passive component is 0.1°.

5. The method for controlling the angle of an optical passive device by combining a high-precision electric adjustment frame with visual recognition according to claim 1, characterized in that: The optical passive component is a reflector or an etalon.

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