Four anti-interference technical measures for transducers
The sensor anti-jamming technical measures are as follows:
3. Quarantine measures
Isolation includes transformer isolation, photocoupler isolation, etc.
Isolation is a technical measure to destroy the interference path and cut off the coupling channel, so as to achieve the suppression of interference.
Transformer isolation is mainly used in the transmission channel to transmit alternating signals.
Optocoupler isolation is widely used in digital interface circuits. At present, more and more photocouplers are used in automatic detection systems to improve the system's ability to resist common mode interference.
Optocoupler is an electro-optical coupling device. Its input is current and output is current, but the input and output are electrically insulated from each other. Ensure the electrical isolation of the input circuit and the output circuit.
The main characteristics of the optocoupler are: high insulation resistance of input and output circuits (greater than 1010Ω) and withstand voltage exceeding 1KV; because light transmission is unidirectional, the output signal will not feedback and affect the input terminal; input and output circuits are in It is completely isolated electrically and can solve the contradiction between isolation and transmission between different potentials and different logic circuits.
