Smoke ventilator intelligent control system based on low-pass filtering application circuit

The invention discloses a smoke ventilator intelligent control system based on a low-pass filtering application circuit. The system is mainly composed of a central processor, a power supply, a smog sensor connected with an A/D analog-to-digital converter, a three-end voltage stabilizing filter circuit connected in series between the power supply and the central processor, and the A/D analog-to-digital converter, a motor and an alarm which are connected with the central processor, and is characterized in that the low-pass filtering application circuit is also connected in series between the smog sensor and the A/D analog-to-digital converter; the low-pass filtering application circuit is composed of a signal filter circuit connected with the smog sensor and a signal amplification circuit connected with the signal filter circuit; and the output end of the signal amplification circuit is connected with the low A/D analog-to-digital converter. The intelligent household smoke ventilator control system provided by the invention can accurately acquire an oil smoke concentration value, accurately controls a smoke ventilator to be automatically turned on or turned off, and provides a good living environment for people.