Since there are often a large number of electrical and magnetic interference sources at the production site, they can damage the normal operation of sensors, computers and even the entire inspection system. Therefore, anti-jamming technology is an important part of the sensor detection system. For those engaged in automatic inspection work, It is very necessary to understand anti-jamming technology.
A useless signal appearing in the circuit of an electronic measuring device is called noise. When noise affects the normal operation of the circuit, the noise is called interference. The formation of interference during signal transmission must have three factors, namely the interference source, the interference path and the receiving circuit with high sensitivity to noise. Therefore, the method of eliminating or attenuating noise interference can take measures against any of the three items. A more common method in the sensor detection circuit is to take corresponding measures on the interference path and the receiving circuit to eliminate or attenuate the noise interference. The following describes several commonly used and effective anti-interference techniques.
1, shielding technology
The container is made of a metal material. The circuit to be protected is packaged therein to effectively prevent interference from electric or magnetic fields. This method is called shielding. Shielding can be divided into electrostatic shielding, electromagnetic shielding and low frequency magnetic shielding.
