Capacitance sensor
A capacitive sensor and sensor technology, which is applied to the liquid level indicator for physical variable measurement, etc., can solve the problems of increasing the difficulty of sensor calibration and calibration, the large difference in the quality of the measured liquid, and the difficulty of sensor calibration and calibration, and achieves a compact structure. , the structure is simple, the effect of improving the accuracy
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[0028] Such as figure 1 As shown, the capacitance sensor of the present invention is the sensor head 5, the outer electrode 1, the top compensation electrode 6, the 6-segment measuring electrode 7, and the bottom compensation electrode 8 from top to bottom. Each electrode is connected by a connecting piece 3 made of insulating material, and there is a layer of insulating material 4 outside the entire inner electrode. The capacitance value of the sensor will change with the change of the liquid level between the inner and outer electrodes. The measuring circuit obtains the liquid level value by detecting the change of the capacitance value.
[0029] Such as figure 2 Shown are the front view and the left view of the connecting piece 3. The two ends of the connecting piece 3 are provided with external threads 31, which are used to connect with each of the internal electrodes. The cylindrical portion 32 protruding in the middle is used to insulate two adjacent electrodes, and its ...
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