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Optical self-checking linear beam smoke detector and on-site self-checking method

A linear light beam and smoke-sensing fire technology, which is applied to fire alarms, instruments, and alarms that rely on radiation effects, can solve problems such as inconvenient working conditions, hidden fire safety hazards, and large detector installation spans. Achieve the effect of strengthening daily maintenance and testing, reducing failure rate and false alarm rate, and convenient and effective on-site testing

Active Publication Date: 2022-03-18
SHENYANG FIRE RES INST OF MEM +1
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Problems solved by technology

[0002] Linear beam smoke detectors are widely used in fire protection projects of large-space buildings and venues that play an important role in the national economy and social life. Large size, high location, complex distribution, inconvenient working conditions, high risk, on-site inspection and daily maintenance are very difficult, lack of convenient and effective on-site inspection and calibration methods
[0003] In order to cope with the difficulty of on-site detection, some unreasonable detection methods have appeared: 1) completely ignore the fire detection mechanism, and use wireless remote control or wired transmission to conduct false detection; 3) Use the detection method of opaque and non-quantified objects to block the light path; these methods that do not conform to the principle of fire detection and cannot really detect the product performance have brought hidden dangers to fire safety

Method used

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  • Optical self-checking linear beam smoke detector and on-site self-checking method
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  • Optical self-checking linear beam smoke detector and on-site self-checking method

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Embodiment Construction

[0029] An embodiment of the present invention will be further described below with reference to the accompanying drawings.

[0030] In this embodiment of the present invention, as figure 1 As shown, the optical self-checking linear beam smoke detector includes a single chip microcomputer, a signal receiving circuit, a signal answering circuit, and a linear beam electronically controlled dimming simulated smoke optical self-checking circuit;

[0031] In this embodiment of the present invention, as figure 1 As shown, the linear beam electronically controlled dimming simulates a smoke-sensing optical self-checking circuit, including an infrared light-emitting tube FG, an adjustable voltage regulator tube W1, a first PNP tertiary tube T1, a second NPN tertiary tube T2, and a third NPN transistor T3, first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, fifth resistor R5, sixth resistor R6, seventh resistor R7, capacitor C1, diode D1, infrared light receivi...

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Abstract

The invention belongs to the technical field of fire detection, and specifically relates to an optical self-inspection linear beam smoke detector and an on-site self-inspection method. Optical self-inspection circuit for dimming analog smoke sensing. The present invention realizes fire detection sensitivity detection and fault diagnosis for detectors in real time on site. If the fire detection function or sensitivity and other performance indicators of the detector are abnormal, an alarm signal will be sent during self-inspection, thereby The main performance and technical indicators of this detector are greatly superior to the traditional linear beam smoke detector in terms of convenient and effective daily maintenance and on-site inspection, reducing failure rate and false alarm rate, eliminating missed fire alarms, and ensuring sensitive and stable fire detection. Detector: This product provides an advanced, reliable, practical and urgently needed new fire detection and alarm product for the fire safety of large space buildings in my country.

Description

technical field [0001] The invention belongs to the technical field of fire detection, and in particular relates to an optical self-checking linear beam smoke fire detector and an on-site self-checking method. Background technique [0002] Linear beam smoke detectors are widely used in fire protection projects in large space buildings and venues that play an important role in national economy and social life. There are the following outstanding problems to be solved urgently: Since the detectors are installed in large space buildings with spans It is large, high in location, complex in distribution, inconvenient to operate under working conditions, dangerous, very difficult on-site inspection and daily maintenance, and lacks convenient and effective on-site inspection and calibration methods. [0003] In order to cope with the difficulty of on-site detection, there are some unreasonable detection methods: 1) completely ignore the fire detection mechanism, and use wireless re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B29/00G08B17/12
CPCG08B17/12G08B29/00
Inventor 翁立坚王勇俞刘玉宝王爱中杨占林
Owner SHENYANG FIRE RES INST OF MEM
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