A multi-gas parallel trace detection fire hazard early warning device and method

A fire early warning, multi-gas technology, applied in measurement devices, color/spectral characteristic measurement, material analysis by optical means, etc. The temperature detection method is expensive and other problems, to achieve the effect of reducing detection error and high sensitivity

Active Publication Date: 2017-03-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current fire detection method only covers the follow-up process of trace gas release, and adopts smoke detection and temperature detection methods in the method: the smoke detection method determines that the fire has already occurred when this type of equipment alarms, and it can o

Method used

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  • A multi-gas parallel trace detection fire hazard early warning device and method
  • A multi-gas parallel trace detection fire hazard early warning device and method
  • A multi-gas parallel trace detection fire hazard early warning device and method

Examples

Experimental program
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Effect test

Example Embodiment

[0029] Embodiments 1 and 2, referring to the accompanying drawings, a multi-gas parallel trace detection fire early warning device, which includes: an air chamber 1, a heat insulation chamber 8, a power supply module 5, an air intake pump 6, a temperature control assembly 9, an excitation light module 2, a light sensing module 3 and an electronic processing module 4;

[0030] The air passage in the air chamber 1 is S-shaped, and a coated mirror 7 for reflecting the light source is arranged at each corner of the air passage; the inner surface of the air chamber 1 is gold-plated to ensure sufficient reflectivity; the air passage in the air chamber 1 The starting end and the ending end are respectively provided with an air inlet 10 and an air outlet 11; the air inlet 10 is provided with a filter membrane for filtering out gas impurities; Press one-way film;

[0031] The temperature control assembly 9 is installed on the outer wall of the air chamber 1 and is used for temperature...

Example Embodiment

[0040] Embodiment 2, the multi-gas parallel trace detection fire early warning method, which is based on the multi-gas parallel trace detection fire early warning device as claimed in claim 1, comprising the following steps:

[0041] Step 1: the temperature control component 9 controls the temperature of the gas chamber 1 under the control of the electronic processing module 4; the electronic processing module 4 drives the air intake pump 6 to introduce the ambient gas into the gas chamber 1;

[0042] Step 2: The electronic processing module 4 drives the calibration light T9 in the excitation light module 2 in a square wave mode;

[0043] Step 3: An infrared sensor in the light sensing module 3 outputs the response voltage under the calibrated band light, and the electronic processing module 4 demodulates the calibrated light response voltage V by the digital phase-sensitive detection method B ;

[0044] Step 4: The electronic processing module 4 drives the auxiliary light T2...

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Abstract

The invention belongs to the technical field of gas analysis and detection, particularly relates to fire hazard early warning, and more particularly relates to a multi-gas parallel trace detection fire hazard early warning device. According to a technical scheme, a gas chamber, a power source module and an electronic processing module are mounted in a heat insulating bin, an exciting light module is mounted near a gas inlet of the gas chamber, an optical sensing module is mounted near a gas outlet of the gas chamber, a gas feeding pump is driven by the electronic processing module to feed environment gases into the gas chamber, a part of exciting light energy corresponding to gas absorption wavebands is absorbed by the gases in the gas chamber, the absorption is reflected in a response voltage of infrared sensors of the optical sensing module, and the concentrations of corresponding gases are acquired by calculation by the electronic processing module. The device can achieve fire hazard early warning through trace gas detection, and can play a role of fire hazard early warning for a large-scale electronic device machine room. Compared with the prior art, the device provides long-time calibration means based on assistant light and calibration light, a detection error is corrected by combination of multiple light sources and a detector, and the detection error is further reduced through phase sensitive detection.

Description

technical field [0001] The invention belongs to the technical field of gas analysis and detection, in particular to fire early warning. Background technique [0002] As people have more and more needs for information services, there are more and more places with dense electronic equipment. From fixed server rooms to cloud service centers to mobile electronic equipment vehicles and ships, a large number of electronic equipment are gathered. A fire in such a densely populated facility would result in enormous property damage, requiring a large number of reliable fire detection devices. The fire occurrence process can be roughly divided into several processes, such as the release of trace gas, the sharp rise in temperature and the generation of flames, the generation of smoke, and the spread of fire. The current fire detection method only covers the follow-up process of trace gas release, and adopts smoke detection and temperature detection methods in the method: the smoke de...

Claims

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Application Information

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IPC IPC(8): G01N21/31
CPCG01N21/31G01N2021/3129
Inventor 李晓琼韩杰冷坤周永康樊云龙
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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