Single particulate matter sampling device and system

Abstract

The invention discloses a single particulate matter sampling device and system. The single particulate matter sampling device comprises a sampling head, a motor, an air pump and a control module. The sampling head comprises an upper cover, a particle size cutting plate, a sample table, a sampling head rotating shaft and a lower cover. The upper cover and the lower cover form a cavity. An air inlet communicated with the outside atmosphere is formed in the upper cover, and an air outlet connected with the air pump is formed in the lower cover. The particle size cutting plate is arranged in the cavity, forms an accelerating cavity with the upper cover and forms a collecting cavity with the lower cover. One or more particle size cutting holes are formed in the particle size cutting plate, a plurality of uniformly distributed sample positions are arranged on the sample table, and grooves with the same number as the particle size cutting holes are formed in each sample position and used for placing sample films. The sampling head rotating shaft is arranged below the sample table, and the motor is respectively connected with the sampling head rotating shaft and the control module so as to drive the sample table to rotate according to an instruction of the control module. According to the single particulate matter sampling device and the system, the on-off of the air pump and the switching of sample positions can be remotely controlled in real time, so that continuous and automatic sampling is realized.

Description

technical field [0001] The invention relates to the technical field of aerosol measurement, in particular to a single particle sampling device and system. Background technique [0002] Aerosol particles in indoor air or outdoor atmosphere not only affect air quality, but may also endanger the health of exposed populations. Collecting and obtaining the composition information of atmospheric particulate matter is an important means to improve air quality and analyze the climate and environmental and health effects of particulate matter. Most of the existing particle samplers are collected by the principles of inertial collision, filter interception and electrostatic attraction. The mass and volume of this type of collector are relatively large, and it is not easy to move and carry. The existing commonly used atmospheric single particle sampler can only collect one sample at a time, and cannot perform continuous sampling. If multiple samples are to be collected, it needs to be...

AI Technical Summary

Problems solved by technology

Most of the existing particle samplers are collected by the principles of inertial collision, filter interception and electrostatic attraction. The mass and volume of this type of sampler are relatively large, and it is not easy to move and carry.

The existing atmospheric single particle sampler that is commonly used can only collect one sample at a time, and cannot perform continuous sampling. If multiple samples are to be collected, it needs to be disassembled many times and the sample membrane needs to be replaced. The operation is cumbersome and time-consuming

Moreover, the existing single particle sampler can only provide manual or semi-automatic continuous sampling. During the sampling process, the sample position is manually switched to achieve continuous collection of multiple samples; a single sampler can only collect one sample at the same sampling time. Simultaneous use of multiple samplers is required to collect multiple samples simultaneously

Existing sampler application scenarios have certain limitations and cannot be used on some mobile platforms, such as collecting samples with high spatial resolution and long-term continuous observation of fixed points on UAVs

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