Error-Tolerant Impedance Measurement Relay Plate
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Solution Overview
Problem
The existing methods for open-circuit and short-circuit tests using handheld multimeters to measure impedance between multiple pins are inefficient and prone to measurement errors due to the complexity of connections.
Innovation Solution
An impedance measurement system comprising a relay plate with multiple relay groups and a control unit that independently controls connections between conductive pins, allowing for efficient switching and reduced error by forming measurement loops between pairs of pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If handheld multimeter is used to measure impedance between multiple pins, then measurement can be performed with simple equipment, but measurement efficiency decreases and error rate increases
Solution Approach 1:
The patent introduces a relay plate as an intermediary device between the multimeter and the pins. The relay plate includes multiple relay groups that automatically establish and break connections between test leads and different pin pairs. This intermediary mechanism eliminates manual connection operations, thereby improving measurement efficiency while ensuring reliable and accurate measurements through controlled connection states.
Solution Approach 2:
The relay plate enables dynamic switching of connection states between test leads and pins. By controlling relays to open or close circuits automatically, the system can rapidly switch between different measurement configurations without manual intervention. This dynamic capability significantly improves measurement efficiency while maintaining measurement accuracy through precise control of connection states.
2Reliability
If manual measurement of all pin pairs is performed, then comprehensive impedance testing is achieved, but time consumption increases significantly
Solution Approach 1:
The relay plate is pre-configured with multiple relay groups, each corresponding to specific pin pairs. Before measurement begins, all connection paths are pre-established through the relay plate's switching mechanism. This preliminary setup allows comprehensive testing of all pin pairs to be performed systematically without time-consuming manual reconfiguration, thus reducing measurement time while ensuring testing completeness.
Solution Approach 2:
The relay plate divides the comprehensive testing task into multiple independent relay groups, where each relay group handles specific pin pair measurements. This segmentation allows parallel or sequential execution of multiple measurements without interference, significantly reducing total measurement time while maintaining complete coverage of all pin pairs for reliable testing.
3Reliability
If multiple connections are made manually for comprehensive testing, then all pin pairs can be measured, but connection complexity and error probability increase
Solution Approach 1:
The relay plate serves as an intermediary that manages all connections between test leads and pins. Instead of making multiple manual connections, the operator simply connects the multimeter to the relay plate's input terminals. The relay plate then automatically establishes the required connection patterns through its relay groups, greatly simplifying the operational process while maintaining complete testing coverage and reducing connection errors.
4Ease of operation
If handheld multimeter is used for multiple pin measurements, then portable measurement is achieved, but measurement precision decreases due to human error
Solution Approach 1:
The relay plate acts as an intermediary that eliminates manual connection operations while preserving the portability of the handheld multimeter approach. By automating the connection control through relays, the system removes the source of human error in manual wiring, thereby improving measurement precision. The multimeter remains portable and easy to operate, while the relay plate ensures precise and error-free connections.
Data Source
AI summary
A system for measuring impedance which is tolerant of connection errors includes a measuring instrument and a relay plate. The relay plate includes a plurality of relay groups. A relay group comprises a first channel, a second channel, a third channel, and a fourth channel. The first to fourth channels are electrically connected to a conductive pin of the product. The relay board further comprises a first voltage interface, a second voltage interface, a first current interface, and a second current interface, the first voltage interface is electrically connected to the first channel, the first current interface is electrically connected to the second channel, the second voltage interface is electrically connected to the third channel, and the second current interface is electrically connected to the fourth channel, a control unit being able to switch between these when connected to obtain impedance measurements.