乐米彩票靠谱⎛⎝DGDNG⎠⎞ Manufacturing process and performance test of displacement sensor brush

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Manufacturing process and performance test of displacement sensor brush

Release date: June 17, 2019 Hits: 144
Displacement sensor Or the electric brush of the angle sensor. When the example shows its composition and production process, we can see that the composition is divided into two parts: the golden part is made of beryllium copper, and the wire brush part is made of precious metal. We weld the two materials into a complete brush, Beryllium copper is used as an elastic spring, so that the connected wire like precious metal can completely contact with the resistance film without poor contact or no contact. Therefore, we choose to use beryllium copper material. Beryllium copper is very easy to be formed before heat treatment, and it will have good elasticity after heat treatment, It can make the wire brush contact the thick film resistor (resistor piece) closely. The wire like precious metal brush can be used as multi finger brush because of its good wear resistance and conductivity, and it can be used as multi finger brush after being arranged side by side. The contact between the brush and the resistance film can be multi-point, which can avoid poor contact. Therefore, the wire like precious metal material can make up for the poor film property of beryllium copper, Therefore, the combination of beryllium copper and precious metal materials can achieve complementarity and economy (because the price of precious metal materials is extremely expensive). In addition, the fixture with filiform precious metal brushes arranged side by side is provided. As shown in the figure below, precious metal wires are merged into one row by mechanical structure

Brush, beryllium copper and filiform precious metals
 Manufacturing process and performance test of displacement sensor brush
Schematic diagram of side-by-side fixture for filamentous precious metal wire rod:
 Manufacturing process and performance test of displacement sensor brush
straight line Displacement sensor And the angle sensor (potentiometer) is passive, so we need to test the contact performance between the brush and the resistor. We can use the signal generator to set the signal waveform and frequency, connect the signal waveform and frequency to the 1-end and 3-terminal of the displacement sensor or the angle sensor, and then connect the 1-end and 2-end of the sensor with the oscilloscope, Then rotate the angle sensor or push-pull displacement sensor. At this time, we can see whether the waveform on the oscilloscope will change with the change of the size. We can see whether the waveform has irregular jump. If there is an irregular jump, the waveform will change, It indicates that the contact between the brush and the resistor is poor at this angle or position. Therefore, we can use this method to detect the contact performance between the brush and the resistor during the full stroke of the angle sensor or displacement sensor


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