Transmission-type smokemeter calibration method

Abstract

The invention designs a transmission-type smokemeter calibration method, which is a transmission-type smokemeter calibration method based on a smokemeter measurement system provided with a main light path and a reference light path, and the measurement system comprises a double-path light source, a spectroscope, four lenses, a measurement chamber, two air ducts and a light intensity sensor. The calibration method comprises an automatic diagnosis process, a linear check process and an automatic calibration process, and the automatic diagnosis process is used for judging whether the light transmission efficiency of related devices in the system and the performance difference of each light source reach the standard or not when the system is started or manually triggered. Measuring the light intensity value of each sensor according to a set check point and light intensity in the linear check, judging whether the light intensity value is qualified or not according to a formula, and if not, executing an automatic calibration process until the automatic calibration of the set point is completed according to a set program; according to the scheme, automatic linear inspection of the transmission-type smokemeter can be realized without a standard lightproof smokemeter and the like, the measurement precision is high, the equipment state can be automatically diagnosed, the light source intensity can be dynamically adjusted, the measurement precision can be automatically calibrated and ensured, and the equipment maintenance period is prolonged.

Description

technical field [0001] The invention relates to a transmission type smoke meter calibration method, which belongs to the technical field of motor vehicle exhaust detection in the environmental protection industry. Background technique [0002] With the development of society and the increasing popularity of motor vehicles, people have higher and higher requirements for the emission of motor vehicle exhaust. Conventional transmission opacimeters are often used to detect the opacity and light absorption coefficient of motor vehicle exhaust. This equipment is easy to operate and easy to use, but it needs to be calibrated with multiple standard opaque sheets every time it is turned on to determine whether the performance of the equipment is normal. , to prevent misjudgment. For example, the filter-based calibration method mentioned in "Calibration Device and Detection System for Exhaust Opacity Detection" (202021031317.9), so the equipment calibration operation process is cumbe...

AI Technical Summary

Problems solved by technology

However, the structure of this scheme is complicated, and calibration blocks equipped with light attenuation lenses with transmittances of 30%, 50% and 70% are still required to be inserted in order to verify the linear relationship of the equipment, so as to realize the calibration of the transmission smoke meter

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