Capacitive load cell

Sources: | Date: 2014-06-03 13:07:30 | Browse:81073

Abstract:

The capacitive load cell has many structural forms. As long as the deformation of the elastic sensitive element causes the capacitance to change with the change of the applied mass, the capacitive load cell can be formed.The upper and lower planes of …

The upper and lower planes of the internal organs of the flat ring-shaped elastic element are respectively fixed with the fixed weight plate and the moving electrode plate of the capacitive sensor, when weighing. The elastic element deforms under force. Displacement of the moving electrode plate causes the capacitance of the sensor to change. When the frequency modulation circuit is connected, the oscillation frequency of the oscillator will change, and the frequency signal will be counted, coded, and transmitted to the display part.

The capacitive load cell is a row of circular holes punched at the same height on the elastic steel body. A row of parallel plate capacitors is formed in the hole. When the upper end of the steel body bears weight. Deformation of round hole. The gap between the capacitor plates in each hole becomes smaller. The capacitance increases accordingly. Since the capacitances are connected in parallel on each circuit, the result reflected by the output is the change of the average force. The measurement error is reduced due to the increase of the error averaging effect.

Weighing sensor, weighing module, weight transmitter, weighing control instrument, weighing application system

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