The audio speaker is one of the main accessories of audio equipment. During the production process of the audio speaker, after the solder joints on the speaker voice coil and the metal wire are welded, the solder joints and the metal wire need to be glued to prevent the solder joints. Oxidation and loosening of the metal bonding wire, thereby prolonging the service life of the audio speaker.
Most of the existing speaker manufacturers use manual hand-held glue gun dispensing technology in the production of audio speakers, which seriously affects the production efficiency of audio speakers. In order to realize the automatic production of audio speakers and improve the production efficiency of enterprises, automatic dispensing is an indispensable link.
Aiming at the problem of automatic dispensing of speaker voice coils, a machine vision-based automatic dispensing system for speaker voice coils is produced. First of all, the research status of dispensers at home and abroad was investigated. According to the dispensing requirements and dispensing environment of the speaker manufacturer, the performance index analysis of the dispensing system and the overall plan design of the system are carried out. Complete the hardware selection of vision system and motion control system, including light source, industrial camera, lens, motion control board, etc.
In addition, the camera calibration technology is introduced, the camera is calibrated using the nine-point calibration method, and the conversion relationship between the image coordinate system and the world coordinate system is obtained. Secondly, image acquisition of the speaker voice coil is carried out, and the solder joints and metal wires on the speaker voice coil are identified through image algorithms, and the pixel coordinates of the dispensing position are extracted. In the process of using image algorithms to identify solder joints and metal welding wires, a second least squares ellipse fitting method based on Hough circle detection is proposed, which combines the Hough gradient circle fitting method and least squares ellipse fitting The advantages of the method are high recognition rate, short time-consuming, small error, and wide applicability of the algorithm.
Then, the mechanical structure, control system, and communication module of the dispensing system are analyzed and designed separately, and the application software design and development of the speaker voice coil automatic dispensing system is completed in combination with the needs of the speaker manufacturer and the system dispensing requirements. Completed the research and development of the automatic dispensing system for the speaker voice coil.
Finally, the research and development of the speaker voice coil automatic dispensing system is carried out experimental test analysis. The experimental results show that the automatic speaker voice coil dispensing system based on machine vision meets the performance indicators of the system and meets the requirements of the speaker manufacturers. The research and development is successful, and finally it has been put into enterprise production.
Most of the existing speaker manufacturers use manual hand-held glue gun dispensing technology in the production of audio speakers, which seriously affects the production efficiency of audio speakers. In order to realize the automatic production of audio speakers and improve the production efficiency of enterprises, automatic dispensing is an indispensable link.
Aiming at the problem of automatic dispensing of speaker voice coils, a machine vision-based automatic dispensing system for speaker voice coils is produced. First of all, the research status of dispensers at home and abroad was investigated. According to the dispensing requirements and dispensing environment of the speaker manufacturer, the performance index analysis of the dispensing system and the overall plan design of the system are carried out. Complete the hardware selection of vision system and motion control system, including light source, industrial camera, lens, motion control board, etc.
In addition, the camera calibration technology is introduced, the camera is calibrated using the nine-point calibration method, and the conversion relationship between the image coordinate system and the world coordinate system is obtained. Secondly, image acquisition of the speaker voice coil is carried out, and the solder joints and metal wires on the speaker voice coil are identified through image algorithms, and the pixel coordinates of the dispensing position are extracted. In the process of using image algorithms to identify solder joints and metal welding wires, a second least squares ellipse fitting method based on Hough circle detection is proposed, which combines the Hough gradient circle fitting method and least squares ellipse fitting The advantages of the method are high recognition rate, short time-consuming, small error, and wide applicability of the algorithm.
Then, the mechanical structure, control system, and communication module of the dispensing system are analyzed and designed separately, and the application software design and development of the speaker voice coil automatic dispensing system is completed in combination with the needs of the speaker manufacturer and the system dispensing requirements. Completed the research and development of the automatic dispensing system for the speaker voice coil.
Finally, the research and development of the speaker voice coil automatic dispensing system is carried out experimental test analysis. The experimental results show that the automatic speaker voice coil dispensing system based on machine vision meets the performance indicators of the system and meets the requirements of the speaker manufacturers. The research and development is successful, and finally it has been put into enterprise production.
Previous：Already the first article
Next：Principle comparison of screw pump dispenser and piston dispenser
