Electronic weighbridge - the effect of external interference on the use of the weighbridge
Shanghai Jiujin Weighing Apparatus Factory——
Electronic weighbridge - mainly used to measure the weight of car load items. It consists of four parts: the scale body, the load cell, the display instrument and the communication line. Among them, the scale body is also called the pound surface, which is a table surface carrying a large weight load such as a vehicle; the load cell is an induction element that converts the load weight of the weighing platform into an electrical signal; the communication line changes the electrical signal output by the sensor into a meter. The displayed communication carrier; the display instrument is also called a display, and the signal transmitted by the communication line is processed and displayed as a weight reading.
Electronic weighbridge - the effect of external interference on the use of the weighbridge
1. Power supply with high anti-interference performance, such as high anti-interference power supply designed by spectrum equalization method. This kind of power supply is very effective against random interference. It can convert the high-peak disturbance voltage pulse into a low-voltage peak voltage, but the energy of the interference pulse is constant, which can improve the anti-interference ability of the electronic platform.
2. The isolation transformer is adopted. Considering the high-frequency noise, the transformer mainly relies on the mutual inductance coupling of the primary and secondary coils, but is coupled by the primary and secondary parasitic capacitances. Therefore, the shielding between the primary and secondary of the isolation transformer is shielded. Layer isolation reduces its distributed capacitance to improve resistance to common mode interference. 3. Implement power supply grouping, for example, separate the driving power of the execution motor from the control power supply to prevent interference between devices.
4. Interfering with the interference controller designed according to the principle of spectrum equalization at the input end of the AC power supply of the instrument, the energy concentrated in the peak voltage is distributed to different frequency bands, thereby reducing its destructiveness and thus suppressing the influence of spike interference.
Shanghai Jiujin Weighing Apparatus Factory————
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