前置器、电涡流传感器和电涡流传感器测量控制方法
By introducing level conversion and amplitude selection circuits into the eddy current sensor, the problem of output inconsistency caused by the accuracy error of the preamplifier components is solved, ensuring the sensitivity and measurement accuracy of the eddy current sensor.
CN117434994BActive Publication Date: 2026-07-17GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GREE ELECTRIC APPLIANCE INC OF ZHUHAI
- Filing Date
- 2023-09-28
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
During use, eddy current sensors suffer from poor output consistency due to component accuracy errors in the preamplifier and differences in cable impedance, which affects measurement accuracy.
Method used
The preamplifier includes a level conversion circuit, a feedback circuit, and an amplitude selection circuit. By adjusting the amplitude and sensitivity of the excitation signal, the consistency of the eddy current sensor output is ensured.
Benefits of technology
This achieved the goal of ensuring that the sensitivity of the eddy current sensor matches the factory test results, improving the accuracy and consistency of measurements and reducing costs.
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Figure CN117434994B_ABST
Abstract
本申请涉及传感器领域，具体而言，涉及一种前置器、电涡流传感器和电涡流传感器测量控制方法，其前置器包括电平转换电路、反馈电路和幅值选择电路；所述幅值选择电路用于接收控制器传输的控制信号并根据所述控制信号向所述电平转换电路输出幅值可变的电压；所述电平转换电路用于基于所述幅值选择电路传输的所述电压的幅值改变所述第一激励信号的幅值，得到所述第二激励信号。当发现电涡流传感器的实际灵敏度与出厂测试的灵敏度不符时，可以改变第二激励信号的幅值，使得实际灵敏度与出厂测试的灵敏度相符，保证了电涡流传感器输出的一致性。
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