Anti-interference problem of electromagnetic flowmeter (6)

2 Transmission channels of electromagnetic interference

②Filter

Filtering refers to the classification of various signals according to their frequency characteristics and the control of their direction. It is the technique of providing transmission poles for signals in certain frequency ranges, and providing transmission zeros for signals in other frequency ranges.

③Ground

Grounding is the implementation of grounding, that is, according to certain requirements, use necessary metal conductors or wires to connect certain ground potentials in the circuit, or connect a certain part of electronic or electrical equipment to the ground.

④Wiring

Different types of signals are transmitted by different cables. Avoid laying signal cables and power cables in parallel to reduce electromagnetic interference.

(2) Intercept the way of communicating the disturbance.

(3) Improve the ability of sensitive equipment to resist electromagnetic interference (decrease the sensitivity to interference).