Atmospheric multiparameter transmitter for PM2.5 particulate matter monitor and use method thereof

Abstract

The invention discloses an atmospheric multiparameter transmitter for a PM2.5 particulate matter monitor. The atmospheric multiparameter transmitter is characterized in that the upper end of a sampler pipeline (16) is connected with a sampler (1); the sampler pipeline (16) passes through a heater (2); the lower end of the sampler pipeline (16) is connected with a sensor module (15); one end of a heating power supply control unit (6) is connected with the heater (2) and the other end of the heating power supply control unit (6) is connected to a multiparameter transmitter host (10); a temperature and humidity sensor (5) is arranged on the sampler pipeline (16); an outdoor sensor (4) is positioned on the edge of the sampler (1); one end of a sensor transmission line terminal (9) is respectively connected with the temperature and humidity sensor (5), the outdoor sensor (4) and an RS232 external output communication interface (8); and the other end of the sensor transmission line terminal (9) is connected with the multiparameter transmitter host (10). The atmospheric multiparameter transmitter improves accuracy and reliability of sampling and analyzing PM2.5, has functions of monitoring, regulating and controlling temperatures, humidities and pressures inside and outside the PM2.5 sampler in real time, adopts a heat tracing condensation-preventing technology, intelligently controls sample gas into a suitable humidity range and ensures accuracy of PM2.5 measurement.

Description

technical field [0001] The invention relates to atmospheric particulate matter monitoring equipment, in particular to an atmospheric multi-parameter transmitter for a PM2.5 particulate matter monitor. Background technique [0002] The complete system of atmospheric PM2.5 particle mass concentration detector based on Beta ray method is generally composed of PM10 sampling head, PM2.5 cutter, sampling head, atmospheric multi-parameter intelligent transmitter and instrument host. The basic principle of the Beta ray method is to use the attenuation of the Beta ray released by C14 to detect the mass concentration of atmospheric particulate matter by the particles deposited on the filter membrane. During the measurement, the air pump is required to extract the measured air at a certain flow rate, and the PM2.5 light chopper is used to separate the particles with a particle size of less than 2.5 microns in the air, and deposit them on the filter paper, and then calculate and measure...

AI Technical Summary

Problems solved by technology

[0011] In view of the large difference between the temperature and humidity of the test chamber and the temperature and humidity in the air, which affects the normal measurement of PM2.5 and the numerical value and accuracy obtained by compensation are not stable, etc., the present invention provides a PM2.5 particle monitor. The multi-parameter transmitter can provide the basis for accurate calculation of the dry basis content of PM2.5 in the standard state, and it is matched with the sampler of the PM2.5 ultrafine particle monitor

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