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The Method of Expanding the Detecting Angle of Flame Detector

A flame detector and viewing angle technology, which is applied in the field of flame detection, can solve the problems of blind spot of viewing angle, false negatives, small detection viewing angle of flame detector, etc., and achieve the effect of increasing the detection viewing angle.

Active Publication Date: 2021-03-16
无锡格林通安全装备有限公司
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Problems solved by technology

[0003] Usually, point-type flame detectors require multiple detectors to be combined and installed in a space area. If the detection angle of each flame detector is unstable or the detection angle is small, it will cause a blind area of ​​the angle of view, even in the event of a fire. There is also a risk of underreporting

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  • The Method of Expanding the Detecting Angle of Flame Detector

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0046] The method for expanding the detection angle of view of the flame detector proposed by the present invention is to further expand the detection angle of view on the basis that the flame detector has the ability to detect flames, so as to avoid the detection angle of view being concentrated at the center of the flame;

[0047] Usually, in order to be able to detect flames, the flame detector contains infrared sensors with four detection channels, of which channel 1 is 4.4-4.6 μm, channel 2 is 4.1-4.3 μm, channel 3 is 2.0-2.4 μm, channel 4 is 4.8-5.4 μm; in other embodiments, other detection light sensors such as ultraviolet sensors can also be used;

[0048] The sensor signal is filtered and amplified, converted from analog to digital, and then collected by the MCU, and then sent to the host computer for analysis;

[0049] (1) extracting the first eigenv...

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Abstract

The invention provides a method for expanding a detection angle of a fire detector, which comprises the following steps of: extracting a first eigenvalue representing the change of detection angle, establishing multiple membership functions of different detection angles about the first eigenvalue; through the membership functions of the different detection angle about the first eigenvalue, calculating the actual detection angle of the fire detector; extracting a second eigenvalue representing fire energy, establishing a membership function of a threshold about the detection angle, wherein, thethreshold is the largest when the detection angle is 0 degree, and decreases with the increase of the detection angle, calculating the threshold corresponding to a current predicted actual angle by using the membership function of the threshold about the detection angle. If the second eigenvalue is greater than or equal to the corresponding threshold, the fire of the actual detection angle can bedetected. The method effectively expands the detection angle of the fire detector without increasing the cost.

Description

technical field [0001] The invention relates to the field of flame detection, in particular to a method for enlarging the detection angle of a flame detector. Background technique [0002] Optical flame detectors detect whether a fire has occurred based on the spectrum emitted by a substance during combustion. According to different spectral wavelengths, it can be roughly divided into ultraviolet flame detectors, purple infrared flame detectors, infrared flame detectors and video flame detectors. Compared with smoke and temperature fire detectors, the spectral detection method has high sensitivity and long detection distance, and can have a good immune effect on interference signals such as wind, rain, high temperature, high humidity, ambient light and artificial light sources. And it has a long service life. [0003] Usually, point-type flame detectors require multiple detectors to be combined and installed in a space area. If the detection angle of each flame detector is...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/42
CPCG01J1/42
Inventor 周永杰张赵良尚国庆郭晶周迁
Owner 无锡格林通安全装备有限公司
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