Relay-Switched Circuit Board Testing for Multiple DUTs
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Solution Overview
Problem
Conventional automatic test systems are limited in testing multiple devices simultaneously, requiring manual switching and prolonged test times due to complex and inefficient test processes.
Innovation Solution
An automatic circuit board test system with a switch module containing relay modules and a software protector, connected through serial port buses, allows for simultaneous testing of multiple devices by switching signal paths and automating the test process, simplifying the flowchart and reducing test time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual switching is used to test multiple devices sequentially, then device testing capability is provided, but test time increases and productivity decreases
Solution Approach 1:
The patent implements dynamic signal path switching using relay modules that can automatically redirect test signals between multiple DUTs. The switch module dynamically changes connection states based on test requirements, enabling automatic transitions between testing different devices without manual intervention, thus resolving the contradiction between versatility and productivity
Solution Approach 2:
The patent introduces a switch module with relay modules as an intermediary component between the test equipment and multiple DUTs. This intermediary automatically manages signal routing, eliminating the need for manual switching while maintaining the ability to test multiple devices, thereby improving productivity without sacrificing testing capability
2Adaptability or versatility
If multiple test programs are used for different DUTs, then testing versatility is improved, but system complexity and operation difficulty increase
Solution Approach 1:
The patent creates a universal test interface that can handle multiple DUT types through a standardized connection. The switch module provides multi-functional signal routing that adapts to different testing scenarios without requiring separate dedicated systems, reducing overall system complexity while maintaining versatility
Solution Approach 2:
The patent segments the testing system into modular components: a universal test equipment unit, a switch module with relay segments, and multiple DUT interfaces. This segmentation allows each component to perform its function independently and be configured for different testing scenarios, simplifying the overall system architecture while preserving versatility
3Ease of manufacture
If manual operation is used to change test programs and connect DUTs, then ease of manufacture is maintained, but ease of operation deteriorates
Solution Approach 1:
The patent implements self-service functionality through automated signal path switching. The switch module automatically manages connections between test equipment and DUTs based on programmed sequences, eliminating manual operation requirements while maintaining ease of manufacture through standardized relay components that are simple to implement
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables rapid and efficient testing of multiple devices without manual intervention, significantly reducing test time and error rates, while providing real-time data analysis and display.
Implementation Method 1
at least one relay module including a plurality of relays, and a software protector connected with the at least one relay module
Data Source
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AI summary
An automatic circuit board test method carried out by an automatic circuit board test system which includes at least one switch module of board under test including at least one relay module and a software protector, a control module, a test process module connected with the control module, a first serial port bus, a second serial port bus and a third serial port bus. The at least one switch module of board under test is connected with a test board which includes a repeater, and a first signal interface connected with the repeater. The first serial port bus is connected between the software protector and the test process module. The second serial port bus is connected between the test process module and the control module. The third serial port bus is connected between the test process module and the first signal interface.