针对现有的微型部件的转速测量方法的局限性，提出了一种基于偏振光检测的微型转速计的设计方案和相应的装置。
A novel miniature tachometer using polarized light detection is presented in this paper, in order to improve current methods of measuring miniature components' rotation speed.
该装置如配以适当的逻辑电路还可测量其他旋转体的转速。
If some necessary logic circuits were added, it can be used to measure Other rotational speeds.
首先设计了适于随车测量的瞬时转速采集装置及其随车监控系统；然后根据在台架试验结果总结出的处理方法，对实车不同工况下的瞬时转速信号测量结果进行了分析。
The on-board measurement device and its monitor system were designed, Then the signal processing method induced from the engine test data was adopted to analyze the test results on the truck.
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