Single ultraviolet phototube optical detector for fire detection at high temperature

A technology of optical detectors and high temperature environment, applied in the field of optical detectors, can solve the problems of false alarms and complexities of infrared photosensitive components and engines, and achieve the effects of high accuracy, improved intelligence and strong ability to prevent false alarms

Inactive Publication Date: 2012-11-14
上海电控研究所有限公司
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Problems solved by technology

However, due to the complexity of the environment in the power compartment of special vehicles, infrared photosensitive components are susceptible to false alarms due to the thermal radiation generated by the engine, etc.
In addition, temperature ha...

Method used

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  • Single ultraviolet phototube optical detector for fire detection at high temperature
  • Single ultraviolet phototube optical detector for fire detection at high temperature
  • Single ultraviolet phototube optical detector for fire detection at high temperature

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Embodiment Construction

[0022] The technical solution of the present invention is described in detail below by means of the accompanying drawings and specific embodiments:

[0023] figure 1 The schematic diagram of the functional module of the single ultraviolet photocell optical detector of the present invention shown is composed of a power filter conversion circuit, a window pollution detection circuit, an ultraviolet light sensing circuit, a temperature compensation circuit, a CPU interface circuit, a serial port communication circuit and an indicator light circuit .

[0024] figure 2 Shown is the schematic diagram of the power filter and conversion circuit of the present invention. In order to adapt to the power supply environment of special vehicles with large fluctuations and interference, the power filter conversion circuit is composed of a power module 4NIC-DC5, a boost circuit and its peripheral circuits. The power filter filters out the transient peak voltage in the power supply, and out...

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Abstract

The invention discloses a single ultraviolet phototube optical detector for fire detection at high temperature. The single ultraviolet phototube optical detector comprises a power filtering conversion circuit, an ultraviolet sensing circuit, a temperature compensation circuit, a window contamination detection circuit, a CPU (central processing unit) interface circuit, a serial port communication circuit and an indicator light circuit. Information of operation state and the like can be transmitted to an upper computer timely by serial port communication. A single ultraviolet photounit adaptive to ultraviolet light of flame is used, so that infrared radiation interference of a power chamber at high temperature is avoided, fire detection is highly accurate, and anti-false-positive capacity is high. Temperature compensation is performed by CPU sampling and calculation, time detectivity is consistent at wide temperature, and intelligent degree is increased remarkably. The condition that window glass is contaminated by oil in the power chamber can be detected by the window contamination detection circuit and reported to the upper computer.

Description

technical field [0001] The patent of the present invention relates to an optical detector, more specifically, to a single ultraviolet photoelectric cell optical detector for detecting fire in a high-temperature environment. Background technique [0002] In the current fire warning system commonly used in special vehicles, the power cabin mainly uses the principle of heat conduction to detect fire. For example, a line flame sensor is used, which has a small fire sensitive area and low sensitivity. With the progress and development of science and technology, the application field of optics is becoming wider and wider. According to relevant abstracts, the existing optical detectors are mainly divided into two categories: one is infrared light detectors, and the other is ultraviolet light detectors. However, due to the complexity of the environment in the power compartment of special vehicles, infrared photosensitive components are susceptible to false alarms due to the thermal ...

Claims

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Application Information

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IPC IPC(8): G08B17/12G01J1/44
Inventor 谭诚李波杨毅宋启盛
Owner 上海电控研究所有限公司
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