External loading type unpowered atmospheric particulate sampler

Abstract

The invention discloses an external loading type unpowered atmospheric particulate sampler. According to the sampler, a sampling hole is formed in the input end of the sampler, a multi-hole exhaust pipe is arranged at the output end of the sampler, and a particulate cutter is arranged on an air flow channel between the sampling hole and the multi-hole exhaust pipe. The external loading type unpowered atmospheric particulate sampler further comprises a differential pressure sensor, a main controller, an electric valve and an empennage regulating element, wherein the electric valve is arranged on the multi-hole exhaust pipe, the empennage regulating element is arranged at the output end of the sampler, and the main controller is connected with the differential pressure sensor through leads. The external loading type unpowered atmospheric particulate sampler is mounted on an aircraft. According to the sampler, a power device does not need to be configured, the atmospheric particulate sampling is realized by using power generated by external air flow, a difference value between air pressures at the input end and the output end of the sampler is detected by the differential pressure sensor in real time, and the electric valve and the empennage regulating element are intelligently regulated according to the difference value between the air pressures by the controller so as to keep a flow rate of sampling air constant, thus realizing constant-speed sampling.

Description

technical field [0001] The invention relates to an atmospheric environment monitoring instrument, in particular to an external load type non-powered atmospheric particle sampler. Background technique [0002] Particle sampler is an important equipment for air quality monitoring. It is mainly used to collect suspended particles in the air and provide a data analysis basis for obtaining the content of suspended particles in the air. The working principle of the impact sampler is: it is beneficial for the suction pump to provide a suction power, so that the air flows into the sampler at a certain speed, and the momentum is different due to the different particle sizes. When the aerosol particles pass through the cutting machine with the air flow When the filter is used, the large particle size is blocked on the collecting plate of the cutter, and the small particle size is driven by the air flow to bypass the collecting plate to reach the filter membrane and be collected, thus ...

AI Technical Summary

Problems solved by technology

The traditional particle sampler itself is equipped with power equipment. Although it can provide a stable power source and ensure a constant sampling speed, it cannot effectively use the power of the airflow itself. Power devices such as air pumps consume more power while providing particle sampling power. power to balance the resistance of the sampler itself

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