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

7 Cites 20 Cited by

AI-Extracted 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

In above-mentioned all embodiments, range of variation between adjacent two sampling values can be set to be less than 4%, the range of variation between...

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.

Application Domain

Fire alarm smoke/gas actuation

Technology Topic

Self adaptiveReal-time computing +3

Image

Examples

Experimental program(3)

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 values for 2 consecutive minutes (50 samplings) are between 140-145 and the first The 50 sampling value is 143, then 143 will be used as the benchmark at this time, and the alarm threshold will be recalculated as 158. At this point, an effective adaptive adjustment is completed, and the new alarm threshold 158 will be used as the basis for alarming or not in the future. If any one of the AD sampling values is greater than 145, the timer will be reset to zero, and the next 2-minute cycle will continue, and so on.

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 consecutive minutes (200 samples) is between 180-192 and the 200th If the sub-sample value is 188, it will re-use 188 as the benchmark and calculate a new alarm threshold value of 209. At this point, an effective adaptive adjustment process will be completed. In the future, the new alarm threshold value 209 will be used as the basis for alarming or not. If the AD sampling value in any one of them is greater than 194, the timer will be reset to zero, and the next 10-minute adaptive adjustment process will continue, and so on.

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 not, the timer is reset to zero. The adjustment cycle of the alarm threshold is timed again;

[0034] (4) After completing an alarm threshold adjustment period (that is, the timer starts counting continuously from 0 for 8 minutes), the digital signal values corresponding to the smoke concentration collected during the adjustment period of the alarm threshold are all 108~112 Within the range of the alarm threshold, adjust the alarm threshold to 135 according to the sampling values in the adjustment period of the alarm threshold, complete an adaptive adjustment process, and then return to step (4) to start a new adjustment cycle of the alarm threshold. Repeatedly.

[0035] It can be seen from the above that the longer the time, the stricter the requirements for the adaptive adjustment process, and the smaller the range of change, the stricter the requirements for the adaptive adjustment process.

[0036] In all the above embodiments, the variation range between two adjacent sample values can be set to be less than 4%. The smaller the variation range between two sample values, the more accurate the adaptively adjusted alarm threshold and the stable sensitivity. The stronger the sex.

PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Classification and recommendation of technical efficacy words

high sensitivity

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

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

Similar technology patents

Acceleration sensor and manufacturing method thereof

Ultrasonic method and apparatus for automatically controlling moving doors

Method and device for transmission of light pilot tone signals

CircRNA markers for early diagnosis of lung adenocarcinoma and application thereof

Power distribution network failure data self-synchronizing method based on instantaneous amplitude change

Classification and recommendation of technical efficacy words

System and method for optical coherence imaging

Three-axis integrated MEMS accelerometer

An application of a Cas protein, and a method and kit for detecting a target nucleic acid molecule

Capacitive micromachined acoustic transducer

Patterning process, resist composition, and acetal compound