Smoke detection method, smoke detection device, smoke alarm and storage medium

A smoke detection device, comprising:

• a detection period adjustment unit configured to adjust a current detection period of a smoke alarm to be a rapid detection period to accelerate the detection frequency of the smoke density when a current smoke density is detected to meet a set density threshold;
• a ratio calculation unit configured to calculate a ratio of an electrical signal increment caused by a first transmitted signal to an electrical signal increment caused by a second transmitted signal;
• wherein received electrical signals generated by the receiver after the transmitters transmit signals increase, and the higher the smoke density, the greater the electrical signal until the electrical signal is saturated;
• and
• an alarm threshold adjustment unit configured to increase smoke alarm threshold of the smoke alarm when smoke is judged not to be caused by a fire hazard based on the ratio;
• wherein the wavelength of the first transmitted signal is different from that of the second transmitted signal, and different types of smoke is judged based on a ratio between the electrical signal increments caused by the two signals.