Flame alarm based on broad band gap semiconductor transducer

A semiconductor and sensor technology, applied in the field of ultraviolet radiation flame alarms, can solve the problems of high installation accuracy, high additional cost, complex structure, etc., and achieve the effect of meeting processing requirements, stable indicators, and small size

Inactive Publication Date: 2004-11-10
TONGJI UNIV
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Problems solved by technology

This filtering device is composed of a series of optical filters, with complex structure, high additional cost and high installation precision requirements

Method used

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  • Flame alarm based on broad band gap semiconductor transducer
  • Flame alarm based on broad band gap semiconductor transducer

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Embodiment Construction

[0014] Please refer to the attached figure 1 . The present invention is composed of a flame sensor 1, a signal amplification circuit 2, a signal conversion circuit 3, a signal processing circuit 4, an execution circuit 5, a fire extinguisher 6, and an audible and visual alarm 7. It is characterized in that the flame sensor 1 is a newly developed low-cost wide-bandgap semiconductor sensor (such as aluminum gallium nitride AlGaN). This wide bandgap semiconductor sensor can only have a highly sensitive response output to ultraviolet light with a wavelength shorter than UVB in the flame (ultraviolet light with a wavelength between 180 nanometers and 260 nanometers or 280 nanometers), while other frequencies are UVB, UVA There is no response to ultraviolet light and visible light (such as sunlight or tungsten lamps), which can prevent false alarms except flames, and has strong pertinence. At the same time, this wide-bandgap semiconductor sensor is not like a silicon semiconductor...

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Abstract

The invention is a broad band gap semiconductor sensor based flame alarm, composed of flame sensor, signal amplifying circuit, signal converting circuit, signal processing circuit, executing circuit, flame damper and acousto-optic alarm. Its character: the flame sensor is a broad band gap semiconductor sensor and has high-sensitivity output response only to the UV light in the flame whose wavelength is shorter than UVB and no response to sunlight and tungsten lamp, thus able to prevent other misalarms. It has simple structure, small bulk, low price, shock resistance, long service life, etc, and can be independently used and provide external communication port to compose system. It can meet different requirements of various fireproof occasions, especially applied to gas station, warehouse, and other places.

Description

technical field [0001] The invention relates to an ultraviolet radiation flame alarm technology composed of semiconductor sensors and the like, in particular to an ultraviolet radiation flame alarm composed of wide bandgap semiconductor sensors and the like. Background technique [0002] Whether a fire can be detected in time depends on people's vigilance on the one hand, but not every place has people patrolling at any time, and the sensitivity of human senses is limited. Therefore, it is necessary to use various types of fire alarms to monitor the fire situation all the time. Once a fire occurs, it can be reported to people in time to extinguish the fire as soon as possible and avoid major accidents. [0003] As we all know, when a fire occurs, it will inevitably be accompanied by smoke, high temperature and flame. The generation of smog, high temperature and flame will cause the current, voltage or mechanical part of some parts of various types ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28G08B17/00
Inventor 吴坚梁骏吾胡正飞闻瑞梅
Owner TONGJI UNIV
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