Conveying component, particulate matter concentration detecting device and particulate matter concentration detection method

Abstract

The invention discloses a conveying component used for conveying a filter membrane forwards and backwards; the conveying component comprises a first paper tape mandrel, a first driving mechanism, a second paper tape mandrel, a second driving mechanism, a counting wheel, a tape rewinding wheel unit, a detecting device and a control device, wherein the first paper tape mandrel is used for winding and unwinding the filter membrane; the first driving mechanism is used for driving the first paper tape mandrel to rotate positively and reversely; the second paper tape mandrel is used for winding andunwinding the filter membrane; the second driving mechanism is used for driving the second paper tape mandrel to rotate positively and reversely; the counting wheel and the tape rewinding wheel unit are arranged on a filter membrane conveying route between the first paper tape mandrel and the second paper tape mandrel and are used for supporting the filter membrane; the detecting device is correspondingly arranged at the counting wheel and is used for detecting the number of rotation turns of the counting wheel; the control device is used for controlling the running of the first driving mechanism and the second driving mechanism according to a detection signal of the detecting device; when the filter membrane is wound on the first paper tape mandrel and the second paper tape mandrel is driven to rotate positively by the second driving mechanism, the filter membrane moves towards the second paper tape mandrel; and the second driving mechanism stops working after the detecting device detects that the counting wheel rotates preset turns.

Description

technical field [0001] The invention relates to the technical field of air detection, and more particularly to a transmission component, a particle concentration detection device and a detection method. Background technique [0002] With the increase of our country's efforts in air pollution prevention and control, it is particularly important to grasp the degree of environmental pollution in various places. If the air pollution index is too high, it will cause serious harm. Because the pollution of tiny particles in the air is an important factor in the detection of air pollution index, so for The detection of ambient particulate matter concentration is very urgent. At present, many companies at home and abroad use the β-ray method to detect the concentration of particulate matter in the air online. The testing principle of the β-ray absorption method is that when the β-ray passes through a certain substance, the electrons in the β-particles collide with each other to caus...

AI Technical Summary

Problems solved by technology

Because if the blank sample and collected samples are not tested at the same position of the filter membrane, there is a high requirement for the uniformity of the filter membrane, but there is no filter membrane with such a high uniformity, so when the blank and collected samples The test data is most accurate at the same position, but due to the influence of β-ray characteristics and the regulations for collecting samples, it is difficult to compare the blank sample and the filter after collecting the sample at the same position of the filter membrane without moving the sample, detector or collection device. film to be tested

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