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A rapid resistance measurement system for quartz pendulums
Bin Xu1, Chenyan Wang1, Jianglong Ma1
1School of Mechanical Engineering, Sichuan University, Chengdu 610065, China.
The Review of Scientific Instruments
|October 2, 2020
Summary
A new automated system significantly improves the manufacturing quality assessment of quartz accelerometers. This advanced measurement technique is 10 times faster and highly repeatable, ensuring precise resistance evaluation of gold-plated quartz pendulums.
Area of Science:
- Materials Science
- Electrical Engineering
- Metrology
Background:
- Quartz pendulums are critical components in quartz accelerometers.
- Current manual resistance measurement for quality control is slow and inconsistent.
- Accurate resistance measurement is vital for evaluating the gold plating quality.
Purpose of the Study:
- To develop an automated system for precise resistance measurement of quartz pendulums.
- To overcome the limitations of the existing manual two-wire method.
- To enhance the efficiency and repeatability of manufacturing quality evaluation.
Main Methods:
- Design and implementation of an automated measurement system.
- Integration of a custom holder, machine vision, RXY-stages, and specialized probes.
- Utilizing a multichannel self-switching module and a high-precision digital multimeter.
- Introduction of a novel pre-measurement positioning technique.
Main Results:
- Achieved a measurement rate of 1 pendulum per minute, a tenfold increase over manual methods.
- Demonstrated high precision with a measurement stability error of 0.9 mΩ (0.13% relative error).
- Exhibited excellent repeatability with a measurement repeatability error of 1.2 mΩ (0.20% relative error).
Conclusions:
- The proposed automated system enables rapid and accurate resistance measurement of quartz pendulums.
- The system significantly enhances the quality control process for quartz accelerometer manufacturing.
- The developed method offers superior speed, stability, and repeatability compared to traditional techniques.
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