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Particle detector and method thereof

A detector and particle technology, applied in smoke detectors, early detection type smoke detectors, environmental monitoring, monitoring and monitoring fields, can solve the problems of rough resolution, unnecessary, difficult alarm threshold, etc., achieve high sensitivity, reduce small size effect

Inactive Publication Date: 2008-03-05
马丁．T．科尔
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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 detector and method thereof
  • Particle detector and method thereof
  • Particle detector and method thereof

Examples

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Embodiment Construction

[0079] 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.

[0080] wavelength of light

[0081] 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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Abstract

The present invention relates to a particle detector which is suitable to determine whether existing particle in fluid sample. The detector includes detector apparatus, which is suitable to provide logarithm scaling signal as the particle indicatory. The present invention also relates to a method for indicating the particle detected by the particle detector relative to the logarithm output of particle speciality, as well as a detector working according to the method.

Description

[0001] This application is a divisional application of the Chinese patent application No. 200480031342.4 with the filing date of October 20, 2004, entitled "Improvement of Particle Monitor and Its Method". technical field [0002] The present invention relates to the field of detection, analysis and / or determination of substances or particles suspended in fluids. [0003] 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 com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00G01N21/49G08B17/10G08B17/103G08B17/107
CPCG08B17/107G08B17/10G08B17/113
Inventor 马丁·T·科尔
Owner 马丁．T．科尔
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