Obscuration type soot particle concentration measuring method and device thereof

Abstract

The invention discloses an obscuration type soot particle concentration measuring device which is used for detecting the smoke particle concentration by a dual-channel measuring technology. Namely, two optical paths and two photoelectric detectors are adopted for carrying out a luminous flux measuring method, so that larger errors of a single-optical-path measuring system, which are caused by environmental factors (for example, temperature and humidity), can be effectively avoided; meanwhile, fire security problems including a delay alarm even a leaked alarm accident and the like of a spot type photoelectric smoke detector can be eliminated. An optical path system structure adopted by the obscuration type soot particle concentration measuring device disclosed by the invention is set up based on an optical spectroscope, a total reflection prism and a reflecting alignment assembly so as to divide the optical path into a reference light source and a main detection light source. Moreover, interference caused by unstable factors of a laser light source, a circuit system and the photoelectric detectors can be effectively eliminated by adopting an alternative-comparison measuring principle, i.e., referring to the time-sharing alternative measurement of the optical paths and the measured main detecting optical path.

Description

technical field [0001] The invention relates to the fields of optoelectronics, sensor technology, environmental monitoring and fire safety, in particular to a dimming type smoke particle concentration measurement method and a device thereof. Background technique [0002] Fire is a disaster that occurs very frequently and is extremely destructive. On average, there are no less than 2,000 fires every day in the world, and about 80,000 people die in fires every year. In recent years, with the continuous emergence of high-rise buildings and the increasing diversification of building materials and household appliances, the hidden dangers of various fires have continued to increase. How to minimize the occurrence of fire and reduce the harm caused by fire has become an important and urgent issue faced by human society. Fire is a combustion process that integrates physical and chemical changes, and the combustion process of objects is accompanied by regular changes in various env...

AI Technical Summary

Problems solved by technology

However, the single-channel measurement system has instability and non-repeatability during long-term work, and the measurement accuracy is relatively low

The single-channel system is often easily affected by external environmental interference (such as temperature, humidity, etc.) during measurement. In addition, when the single-channel measurement system is calibrated, the error of the reference used and the deviation light factor are easily introduced during calibration. These will directly affect the accuracy of the measurement system

Therefore, this method is rarely used in the actual measurement system

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