Circuit Board Testing Fixture with Switch Circuit for Wire Fault Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional circuit board testing methods are labor-intensive and prone to errors due to the manual testing of wires, leading to decreased production yield and increased costs, especially as electronic devices become more complex and miniaturized.
Innovation Solution
A circuit board testing system featuring a testing fixture with a switch circuit, voltage acquisition element, and control unit that automatically tests odd- and even-numbered wires by providing a testing voltage and reading voltage values to determine the functionality of the wires, using optical relays and analog input pins for accurate and efficient assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual testing of wires is performed one-by-one, then the testing process is simple and equipment cost is low, but the testing time is long and production yield deteriorates
Solution Approach 1:
The cable wires are divided into odd-numbered wires and even-numbered wires, with separate testing circuits for each group. The switch circuit segments the testing process into distinct phases, testing odd wires in one phase and even wires in another phase, enabling parallel processing capability while maintaining system manageability
Solution Approach 2:
Multiple testing circuits are merged into a single integrated testing system that shares common components such as the voltage acquisition element, control unit, and switching mechanism. This consolidation enables simultaneous testing of multiple wires while reducing overall system complexity and component count
2Reliability
If manual testing is performed, then equipment cost is low, but labor intensity is high and testing accuracy decreases due to human error
Solution Approach 1:
The testing system performs self-testing through automated voltage application and measurement. The control unit automatically controls the switch circuit to apply testing voltages to different wire groups, and the voltage acquisition element automatically reads and records the voltage values without human intervention, ensuring consistent and accurate results
Solution Approach 2:
The manual mechanical testing process is replaced with an automated electrical testing system. The switch circuit uses electrical switching instead of manual connection/disconnection, and the voltage acquisition element uses electrical measurement instead of visual inspection, eliminating human error and improving reliability
3Productivity
If testing time is reduced for high output value, then production efficiency increases, but testing quality may deteriorate due to rushed manual testing
Solution Approach 1:
The testing system maintains continuous operation by automatically switching between testing odd-numbered wires and even-numbered wires without interruption. The switch circuit enables seamless transition between testing phases, and the voltage acquisition element continuously monitors voltage values, ensuring both speed and precision are maintained throughout the testing process
Data Source
AI summary
A circuit board testing system includes a testing fixture. The testing fixture is used for testing plural wires of a cable of a circuit board. The testing fixture includes a first contact element, a switch circuit, a second contact element, a voltage acquisition element and a control unit. The first contact element is connected with input terminals of the plural wires. The second contact element is connected with output terminals of the plural wires. When the control unit drives a switching action of the switch circuit, a testing voltage is provided to the odd-numbered wires or the even-numbered wires. The control unit reads the voltage values of the odd-numbered wires and the voltage values of the even-numbered wires from the voltage acquisition element so as to judge whether the plural wires of the cable are normal.