CN-117030946-B - Gas detection method, device, equipment and medium for fire alarm

CN117030946BCN 117030946 BCN117030946 BCN 117030946BCN-117030946-B

Abstract

The application relates to the field of fire early warning, in particular to a gas detection method, a device, equipment and a medium for fire alarm, wherein the method comprises the steps of comparing the detected smoke concentration with the preset smoke concentration, and determining a wind power simulation diagram corresponding to a region to be detected according to environmental characteristics and a region model when the detected smoke concentration is higher than the preset smoke concentration; the method comprises the steps of identifying a detection position of detection equipment from an area image, determining a wind power influence value corresponding to the detection position according to the detection position and a wind power simulation diagram, determining a final smoke concentration based on the detection smoke concentration and the wind power influence value, determining a first weight of an area to be detected according to a concentration difference value between the final smoke concentration and a preset smoke concentration limit value, identifying abnormal characteristics in the area image, determining a second weight of the area to be detected based on the abnormal characteristics, and generating a first fire alarm signal based on the first weight and the second weight. The application can improve the accuracy of fire alarm.

Inventors

LI HONGYE
Geng Linru
LI NA
GAO XIANGZHI
GAO LUN

Assignees

河北光森电子科技有限公司

Dates

Publication Date: 20260512
Application Date: 20230814

Claims (8)

1. A gas detection method for fire alarm, comprising: Acquiring the concentration of detected smoke in a region to be detected; Comparing the detected smoke concentration with a preset smoke concentration, and when the detected smoke concentration is higher than the preset smoke concentration, acquiring environmental characteristics and an area model in the area to be detected, wherein the environmental characteristics comprise wind direction and wind speed; Determining a wind power simulation diagram corresponding to the region to be detected according to the environmental characteristics and the region model; Acquiring an area image in the area to be detected, identifying a detection position of detection equipment from the area image, and determining a wind power influence value corresponding to the detection position according to the detection position and the wind power simulation diagram; Determining a final smoke concentration based on the detected smoke concentration and the wind power influence value, and determining a first weight of the region to be detected according to a concentration difference between the final smoke concentration and a preset smoke concentration limit; Identifying abnormal features in the region image, and determining a second weight of the region to be detected based on the abnormal features; Determining a target weight of the region to be detected according to the first weight and the second weight, and generating a first fire alarm signal when the target weight is higher than a preset standard weight; wherein after said determining a final smoke concentration based on said detected smoke concentration and said wind impact value, further comprises: Acquiring a detection electric signal; Determining a plurality of light scattering values corresponding to the region to be detected according to the detection electric signals; according to each light scattering value and the corresponding relation between the scattering value and the smoke particle type, determining the smoke particle type corresponding to each light scattering value; Counting the number of each smoke particle type according to the smoke particle type corresponding to each light scattering value, and determining the proportion of the smoke particle types according to the number of each smoke particle type; determining a hazard level according to the smoke particle type proportion, and determining an alarm level according to the hazard level; wherein the identifying the abnormal feature in the region image comprises: Identifying pixel values in the area image, judging whether a highlight area exists in the area image according to the pixel values, if so, acquiring an area infrared image corresponding to the highlight area, determining the distribution heat quantity of the highlight area according to the area infrared image, and determining that the area image contains a first abnormal feature when the distribution heat quantity is higher than a preset standard heat quantity; Judging whether the area image has preset inflammable characteristics or not, and determining that the area image contains second abnormal characteristics when the area image contains the preset inflammable characteristics; And acquiring a thermal variation graph of the area image in a first preset time period, and determining that the area image contains a third abnormal feature when the thermal variation value of the area image in the preset time period is higher than a preset standard variation value.
2. A gas detection method for fire alarm as defined in claim 1, further comprising: and when the detected smoke concentration is higher than the preset smoke concentration limit value, generating a second fire alarm signal.
3. A gas detection method for fire alerting as defined in claim 1 wherein when there are a plurality of detection devices, the method further comprises: Dividing the region to be detected according to the detection position of each detection device to obtain a plurality of detection regions; acquiring a plurality of actual smoke concentrations corresponding to each detection area in a second preset time period, and determining a smoke concentration change trend of each detection area in the second preset time period according to the plurality of actual smoke concentrations corresponding to each detection area; determining a fire movement track according to the smoke concentration change trend corresponding to each detection area; and determining abnormal characteristics contained in each detection area, determining a fire peak moment based on the smoke concentration change trend and the abnormal characteristics corresponding to each detection area and the fire moving track, and feeding back the fire peak moment to terminal equipment of related personnel.
4. A gas detection method for fire alarm as defined in claim 3, further comprising: determining the abnormal position of the abnormal feature in each detection area, and determining the abnormal interval distance between adjacent detection areas according to the fire movement track; determining an adjustment time according to the number of the abnormal interval distances; And updating the fire peak time according to the adjustment time.
5. The gas detection method for fire alarm as defined in claim 4, further comprising: identifying personnel features in the area image and determining personnel positions of the personnel features; And determining an escape route according to the wind power simulation diagram, the personnel position and the fire movement track.
6. A gas detection apparatus for fire alarm, characterized by being configured to perform a gas detection method for fire alarm as claimed in any one of claims 1 to 5, comprising: The smoke concentration acquisition module is used for acquiring the concentration of detected smoke in the region to be detected; The execution module is used for comparing the detected smoke concentration with a preset smoke concentration, and acquiring environmental characteristics and an area model in the area to be detected when the detected smoke concentration is higher than the preset smoke concentration, wherein the environmental characteristics comprise wind direction and wind speed; the simulation diagram determining module is used for determining a wind power simulation diagram corresponding to the region to be detected according to the environmental characteristics and the region model; The wind power influence value determining module is used for acquiring an area image in the area to be detected, identifying the detection position of the detection equipment from the area image, and determining a wind power influence value corresponding to the detection position according to the detection position and the wind power simulation diagram; The first weight determining module is used for determining final smoke concentration based on the detected smoke concentration and the wind power influence value, and determining first weight of the to-be-detected area according to a concentration difference value between the final smoke concentration and a preset smoke concentration limit value; A second weight determining module, configured to identify an abnormal feature in the area image, and determine a second weight of the area to be detected based on the abnormal feature; the first early warning module is used for determining the target weight of the area to be detected according to the first weight and the second weight, and generating a first fire alarm signal when the target weight is higher than a preset standard weight; the electric signal acquisition module is used for acquiring detection electric signals; The light scattering value determining module is used for determining a plurality of light scattering values corresponding to the region to be detected according to the detection electric signals; The particle type determining module is used for determining the type of the smoke particles corresponding to each light scattering value according to the corresponding relation between each light scattering value and the type of the smoke particles; The smoke particle type proportion determining module is used for counting the quantity of each smoke particle type according to the smoke particle type corresponding to each light scattering value and determining the smoke particle type proportion according to the quantity of each smoke particle type; the alarm grade determining module is used for determining a hazard grade according to the smoke particle type proportion and determining an alarm grade according to the hazard grade; the second weight module is specifically used for identifying abnormal features in the regional image when determining the abnormal features: Identifying pixel values in the area image, judging whether a highlight area exists in the area image according to the pixel values, if so, acquiring an area infrared image corresponding to the highlight area, determining the distribution heat quantity of the highlight area according to the area infrared image, and determining that the area image contains a first abnormal feature when the distribution heat quantity is higher than a preset standard heat quantity; Judging whether the area image has preset inflammable characteristics or not, and determining that the area image contains second abnormal characteristics when the area image contains the preset inflammable characteristics; And acquiring a thermal variation graph of the area image in a first preset time period, and determining that the area image contains a third abnormal feature when the thermal variation value of the area image in the preset time period is higher than a preset standard variation value.
7. An electronic device, characterized in that, the electronic device includes: At least one processor; a memory; At least one application program, wherein the at least one application program is stored in a memory and configured to be executed by at least one processor, the at least one application program being configured to perform a gas detection method for fire alerting as claimed in any one of claims 1-5.
8. A computer-readable storage medium, comprising a computer program stored with a program capable of being loaded by a processor and executing a gas detection method for fire alarm as set forth in any one of claims 1 to 5.

Description

Gas detection method, device, equipment and medium for fire alarm Technical Field The application relates to the field of fire early warning, in particular to a gas detection method, device, equipment and medium for fire alarm. Background Fire is a disaster caused by burning which is out of control in time or space, and because fire is generally uncontrollable and easy to occur, fire is often defined as one of the most frequent and most common major disasters threatening public safety and social development, and once fire occurs, life safety and property safety of the public can be greatly influenced. In the related art, generally, a smoke alarm is installed in a detection area to detect the smoke concentration in the air, and whether fire hidden danger exists in the detection area is judged according to the smoke concentration in the air, but when wind exists in the detection area, the air in the detection area may flow, and further the smoke concentration in the detection area may be reduced, and if whether fire exists in the detection area is judged according to the diluted smoke concentration, the accuracy of fire alarm may be reduced. Disclosure of Invention In order to improve the accuracy of fire alarm, the application provides a gas detection method, a device, equipment and a medium for fire alarm. In a first aspect, the present application provides a gas detection method for fire alarm, which adopts the following technical scheme: a gas detection method for fire alerting, comprising: Acquiring the concentration of detected smoke in a region to be detected; Comparing the detected smoke concentration with a preset smoke concentration, and when the detected smoke concentration is higher than the preset smoke concentration, acquiring environmental characteristics and an area model in the area to be detected, wherein the environmental characteristics comprise wind direction and wind speed; Determining a wind power simulation diagram corresponding to the region to be detected according to the environmental characteristics and the region model; Acquiring an area image in the area to be detected, identifying a detection position of detection equipment from the area image, and determining a wind power influence value corresponding to the detection position according to the detection position and the wind power simulation diagram; Determining a final smoke concentration based on the detected smoke concentration and the wind power influence value, and determining a first weight of the region to be detected according to a concentration difference between the final smoke concentration and a preset smoke concentration limit; Identifying abnormal features in the region image, and determining a second weight of the region to be detected based on the abnormal features; And determining the target weight of the region to be detected according to the first weight and the second weight, and generating a first fire alarm signal when the target weight is higher than a preset standard weight. Through adopting above-mentioned technical scheme, when detecting smoke concentration in the detection zone is higher than the smoke concentration of predetermineeing, wind-force analog diagram that wind direction and wind speed were confirmed through existence in the detection zone, be convenient for confirm the wind-force influence value that corresponds in the detection zone different positions department, be convenient for reduce the influence that air flow caused to smoke concentration measurement through wind-force influence value, because when the air that flows exists in the detection zone, flowing air can probably dilute the gas in the detection zone, consequently, can lead to detecting smoke concentration and the actual smoke concentration phase difference in the detection zone great, therefore, judge through detecting smoke concentration and whether the detection zone needs the degree of accuracy when fire alarm is lower, can reduce the actual smoke concentration in detection zone before the gas dilution through wind-force influence value that wind-force analog diagram confirmed, judge whether the detection zone needs the fire alarm through the smoke concentration after the reduction, accuracy when helping to promote the fire alarm, and judge whether the detection zone needs the fire alarm through the abnormal feature in the detection zone, be convenient for further promote the accuracy of judgement result. In one possible implementation, after the determining the final smoke concentration based on the detected smoke concentration and the wind impact value, the method further comprises: Acquiring a detection electric signal; Determining a plurality of light scattering values corresponding to the region to be detected according to the detection electric signals; according to each light scattering value and the corresponding relation between the scattering value and the smoke particle type, determining the smoke particle typ