Method and device for judging high-humidity false alarm of photoion sensor

The invention discloses a method and a device for judging high-humidity false alarm of a photoion sensor, the method is applied to the photoion sensor, the photoion sensor comprises an ultraviolet lamp and a collector connected with the ultraviolet lamp, and the method comprises the following steps: when the ultraviolet lamp is turned on, the collector is connected with the ultraviolet lamp; the photoion sensor is used for measuring the gas concentration, the collector is used for detecting the first signal voltage, the collector is used for detecting the second signal voltage under the condition that the ultraviolet lamp is turned off, and the first signal voltage and the second signal voltage are subtracted to obtain a voltage difference value; and when the voltage difference value is smaller than a preset threshold value, judging that the current environment is a high-temperature humid environment. The current environment is judged according to the difference value obtained by periodically turning on and t