Particle monitors and method improvement therefor

A monitor and particle technology, applied in early detection type smoke detectors, environmental monitoring, smoke detectors, monitoring and monitoring fields, can solve problems such as unnecessary, rough resolution, rough resolution, etc., to reduce size, High sensitivity effect

Inactive Publication Date: 2010-02-24
SIEMENS SWITZERLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At low smoke levels, it is considered a very coarse resolution, making it difficult to finely set alarm thresholds
However, at high smoke concentrations, a resolution of 0.02% / m is unnecessary, e.g. even having the ability to set alarm thresholds at 10.00% / m or 10.02% / m is of little benefit
Therefore, the resolution of the prior art detectors is considered to be too coarse at low smoke concentrations and too fine at high smoke concentrations

Method used

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  • Particle monitors and method improvement therefor
  • Particle monitors and method improvement therefor
  • Particle monitors and method improvement therefor

Examples

Experimental program
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Effect test

Embodiment Construction

[0057] In the described embodiment at least two channels are mentioned, one channel A using wavelengths such as red or infrared wavelengths and the other channel B using wavelengths such as blue wavelengths. Other channels may be used, such as channel C, which uses wavelengths such as the green wavelength. Other wavelengths may also be used in accordance with the present invention, as will become apparent in the following description. In general, it is preferred if the reading established by the longer wavelength rivals that established by the shorter wavelength. More preferably, the longer wavelength is subtracted from the shorter wavelength. A ratio can also be used to compare wavelength readings.

[0058] wavelength of light

[0059] In one aspect of the present invention, the inventors have determined that the wavelength of light employed critically affects the sensitivity of the device to particle size. Bohren CF and Huffman DR in "Absorption and Scattering of Light b...

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PUM

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Abstract

The present invention relates to the field of the detection, analysis andior determination of matter or particles suspended in fluid. In one particular form, the present invention relates to smoke detectors, which detect unwanted pyrolysis or combustion of material. In another form, the present Invention relates to srnoke detectors of the early detection type, and which may be applied to ventilation, air-conditioning or duct monitoring of a particular area. In yet another form, the present invention relates to surveillance monitoring, such as building, fire or security monitoring. in still another form, the present invention relates to environment monitoring, such as monitoring, detection and / or analysis of a fluid, zone, area and / or ambient environment, including commercial and Industrialenvironments.

Description

technical field [0001] The present invention relates to the field of detection, analysis and / or determination of substances or particles suspended in fluids. [0002] In a particular form, the invention relates to smoke detectors for detecting undesired pyrolysis or combustion in substances. In another form, the invention relates to smoke detectors of the early detection type that may be used for ventilation, air conditioning, or duct monitoring of particular areas. In yet another form, the invention relates to surveillance monitoring, such as building, fire, or security monitoring. In yet another form, the invention relates to environmental monitoring, such as the monitoring, detection and / or analysis of fluids, zones, areas and / or surrounding environments, including commercial and industrial environments. [0003] Obviously, the invention has wide applicability and the particular forms described above are given by way of example only, without limiting the scope of the inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B17/00G08B17/10G08B17/103G08B17/107
CPCG08B17/107G08B17/10G08B17/113
Inventor 马丁·T·科尔
Owner SIEMENS SWITZERLAND
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