Moving Vision PCB Assembly for Multi-Board Mounting
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Solution Overview
Problem
Existing assembly systems for mounting electronic devices on circuit boards are limited by the field of view of visual systems, allowing only one circuit board to be assembled at a time, which reduces efficiency.
Innovation Solution
An assembly system with a robot, a first vision system for guiding electronic device placement, and a second vision system with a moving mechanism to cover multiple circuit boards, enabling step-by-step identification and mounting of devices on multiple boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a vision system with a limited view field is used to identify circuit board positions, then the identification accuracy is ensured, but only one circuit board can be assembled at a time, reducing assembly efficiency
Solution Approach 1:
The vision system is divided into a first vision system for identifying electronic device positions and a second vision system for identifying circuit board positions. The second vision system is mounted on a moving mechanism that divides the inspection process into multiple positions, allowing the limited view field to cover multiple circuit boards sequentially through position segmentation.
Solution Approach 2:
The second vision system is mounted on a moving mechanism that can change its position dynamically. This allows the vision system to move to different locations to identify positions of multiple circuit boards, transforming a static limited view field into a dynamic multi-position inspection capability.
2Productivity
If multiple circuit boards are placed at the assembly station to improve assembly efficiency, then productivity increases, but the limited view field cannot cover all board surfaces, causing identification failures
Solution Approach 1:
The moving mechanism moves the second vision system to predetermined positions to identify circuit board positions and postures before the assembly process begins. This preliminary identification ensures that all necessary position information is collected in advance, preventing information loss during subsequent assembly operations.
Solution Approach 2:
The vision systems provide real-time feedback on electronic device and circuit board positions and postures. The moving mechanism enables the second vision system to scan multiple boards and feed back their positions, ensuring complete information coverage for all circuit boards assembled simultaneously.
3Device complexity
If a single vision system is used to identify both electronic devices and circuit boards, then device complexity is reduced, but the system cannot simultaneously cover both objects with limited view fields
Solution Approach 1:
Different vision systems are assigned to different identification tasks based on their optimal characteristics. The first vision system is dedicated to identifying electronic device positions with high precision, while the second vision system identifies circuit board positions. This local specialization ensures high measurement precision for each task while maintaining manageable overall system complexity.
Data Source
AI summary
An assembly system that includes a robot adapted to grip an electronic device to be mounted on a circuit board, a first vision system that identifies a position and a posture of the electronic device gripped by the robot, a fixing device that fixe a plurality of circuit boards thereon, and a second vision system that identifies a position and a posture of the circuit board fixed on the fixing device. The robot mounts the gripped electronic device on a circuit board under the visual guidance of the first vision system and the second vision system. The view field of the second vision system is not capable of completely covering a surface region of all circuit boards fixed on the fixing device. The assembly system further includes a moving mechanism that moves the second vision system in a first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction, so that the second vision system completes identification of all circuit boards on the fixing device step by step. With this assembly system, the robot complete the assembly work of all circuit boards at an assembly station. Also, a method of assembling a circuit board that mounts a gripped electronic device on a circuit board.