Alarming method of adaptive smoke alarm

Abstract

The invention discloses an alarming method of an adaptive smoke alarm, and the method comprises the following steps of: setting an adjustment period of an alarm threshold in a timer; carrying out primary sampling on smoke concentration and determining the alarm threshold according to a sampling value obtained during the primary sampling; starting the timer to begin timing, and continuously sampling and comparing the sampling value with the alarm threshold; if the sampling value is higher than the alarm threshold, controlling an alarm module to give an alarm; if the sampling value is lower than the alarm threshold, sampling continuously and judging whether the variation range of two adjacent sampling values is less than 10% or not, if yes, timing continuously by the timer and sampling continuously, if not, returning the timer to zero, and timing the adjustment period of the alarm threshold again; and after the adjustment period of the alarm threshold is completed, adjusting the alarm threshold, and restarting the adjustment period of the alarm threshold. The alarming method disclosed by the invention has the advantages that the adaptive adjustment on the alarm threshold according to different environmental factors is realized and higher sensitivity is guaranteed in various environments.

Description

technical field [0001] The invention relates to an alarm method for a smoke alarm, in particular to an alarm method for an environment adaptive smoke alarm. Background technique [0002] Smoke alarm is a kind of alarm that is used to issue alarm signals when a fire occurs. It mainly uses the optical properties of smoke to identify the fire in advance and avoid unnecessary personal injury caused by human negligence or fire in the absence of people. And property loss, has been widely used in the field of security. Existing smoke alarms are generally set with a fixed alarm threshold, and when the smoke concentration detected by the smoke alarm is greater than the alarm threshold, the smoke alarm sends out an alarm. Although the smoke alarm has an extremely fast response ability to the smoke produced by open flame burning and slow burning, the long-term dispersion of dirt and dust in the environmental space can easily affect the sensitivity of the smoke alarm, as well as the h...

AI Technical Summary

Problems solved by technology

Although the smoke alarm has an extremely fast response ability to the smoke produced by open flame burning and slow burning, the long-term dispersion of dirt and dust in the environmental space can easily affect the sensitivity of the smoke alarm, as well as the high and low temperature and the ambient brightness. It has a great influence on the sensitivity of the smoke alarm, and the prerequisite for the reliable alarm of the smoke alarm is that the smoke alarm can maintain the same smoke sensitivity in each environment, because the existing smoke alarm is generally artificially set before use Set an alarm threshold, which may have a large error with the alarm threshold required by the actual environment, and the alarm threshold will not be adaptively adjusted according to different environmental factors, so that the alarm valve If the value does not match the environment, it will easily lead to false alarms or missed alarms, especially when a leaked alarm occurs, it will miss the opportunity to control the fire source, causing casualties and property losses

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