Alarming method of adaptive smoke alarm

A smoke alarm, self-adaptive technology, applied in the direction of fire alarms relying on the effect of smoke/gas, can solve the problems of property loss, casualties, missed timing of controlling the fire source, etc., to overcome the influence of sensitivity, high The effect of sensitivity

Active Publication Date: 2012-08-15
宁波市科技园区佳柏电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 t

Method used

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  • Alarming method of adaptive smoke alarm
  • Alarming method of adaptive smoke alarm
  • Alarming method of adaptive smoke alarm

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Embodiment 1: An alarm method of an adaptive smoke alarm includes the following steps:

[0023] (1) Set the adjustment period of the alarm threshold in the timer to 2 minutes; the rate of change is set to 4%.

[0024] (2) Take the first sampling of the smoke concentration, and convert the sampled smoke concentration into a corresponding digital signal value (AD sampling value) of 140, and determine the initial alarm threshold value of 155 according to the digital signal value;

[0025] (3) Start the timer, the adjustment period of the alarm threshold starts to count, while continuing to sample and compare the sampled value with the alarm threshold 155: if the sampled value is greater than the alarm threshold 155, the alarm module is controlled to issue an alarm; if the sampled value is If it is less than the alarm threshold of 155, continue sampling, and determine whether the variation range between two adjacent sampling values ​​is less than 4%. For example, the AD sampling v...

Example Embodiment

[0026] Embodiment 2: An alarm method of an adaptive smoke alarm includes the following steps:

[0027] (1) The adjustment period of the alarm threshold is set to 10 minutes in the timer, and the rate of change is set to 8%.

[0028] (2) Take the first sampling of the smoke concentration, and convert the sampled smoke concentration into a corresponding digital signal value of 180, and determine the initial alarm threshold value of 205 according to the digital signal value;

[0029] (3) Start the timer, the adjustment period of the alarm threshold starts to count, and at the same time continue sampling and compare the sampled value with the alarm threshold 205: if the sampled value is greater than the alarm threshold 205, the alarm module is controlled to issue an alarm; if the sampled value is If it is less than the alarm threshold of 205, continue sampling and determine whether the variation range between two adjacent sampled values ​​is less than 8%. For example, the AD value for 10...

Example Embodiment

[0030] Embodiment 3: An alarm method of an adaptive smoke alarm includes the following steps:

[0031] (1) Set the adjustment period of the alarm threshold in the timer to 8 minutes;

[0032] (2) Take the first sampling of the smoke concentration, and convert the sampled smoke concentration into a corresponding digital signal value of 100, and determine the initial alarm threshold value of 130 according to the digital signal value;

[0033] (3) Start the timer, the adjustment period of the alarm threshold starts to count, and at the same time continue sampling and compare the sampled value with the alarm threshold 130: if the sampled value is greater than the alarm threshold 130, the alarm module is controlled to issue an alarm; if the sampled value is If it is less than the alarm threshold of 130, continue sampling and determine whether the variation range between two adjacent sampled values ​​is less than 10%. If it is, the timer continues to count and the sampling continues, if no...

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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...

Claims

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Application Information

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IPC IPC(8): G08B17/10
Inventor 蔡忠宝
Owner 宁波市科技园区佳柏电子有限公司
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