Smoke alarm is able to detect smoke concentrations in the environment, and alarm function with the instrument, the instrument should include the most basic components: smoke signal acquisition circuit, analog circuit, control circuit of single chip machine. Smoke signal acquisition circuit composed by smoke sensor and analog amplifier; the smoke signals into analog electrical signals. A/d conversion circuit will smoke detection circuit to send out analog signals into a single-chip digital signals into single-chip which can be identified. Single-chip to filter the digital signal processing, and analysis of the data.
Is greater than or equal to a preset value (that is, the alarm limit), if greater than start alarm alarm sound, and vice versa for the normal state. To facilitate the detection and monitoring equipment testers and users to visually observe combustible smoke concentrations in the environment, concentration can be sent to the display. Easy to adjust alarm limit, you can join keys. To alarm devices with better, can sound the alarm on the basis of added Flash alarm, light signals can cause the change of user's attention, make up for the limitations of the sound in a noisy environment.