Realtime monitor device for granular articles

Abstract

The disclosed real time monitoring device is capable of sucking very fine granules from air. The device includes body case, and sampling chamber formed in cavity inside the case. Being setup on up part of the case, a sampling outlet is connected to the sampling chamber. Static sampling weighing electrodes are setup two sides inside the sampling chamber. Through electrical source, the two electrodes are connected to process component for signal conversion. Since piezoelectric quartz crystal is adopted as sampling electrode, sampling membrane is not needed in the invention to collect granules. Thus, there is no problem of influencing on collection rate of granules caused by size of membrane aperture, as well as there is no issue of process before and after sampling operations. Advantages are: high measuring accuracy, short working time, and redcing human error caused by the said middle sampling process step for membrane.

Description

technical field [0001] The invention relates to a monitoring device, more specifically, the invention relates to a real-time monitoring device for inhalable and fine particles in the air. Background technique [0002] A large number of research results show that inhalable particulate matter can cause diseases of people's respiratory system and cardiovascular system, and even increase the mortality rate of the sick population. On the other hand, to study the extent of the impact of particulate matter on human health, it must be accurately monitored. Currently, many countries have developed PM 10 and PM 2.5 Air quality standards and monitoring standards, and the implementation of the standards must use advanced and accurate monitoring equipment to provide technical support. [0003] Traditional particle monitors first filter large particles through cyclones, and then use adsorption membranes to collect PM in the particles 10 and PM 2.5 , and then weighed with a balance. ...

AI Technical Summary

Problems solved by technology

Traditional samplers use sampling membranes for PM 10 and PM 2.5 The collection of the sampling membrane after use is usually discarded after being used once because the pore size is blocked

In addition, the sampling membrane must be selected during sampling. If the pore size of the sampling membrane is too small, the resistance of sampling will be greatly increased, and the air flow cannot be accurately measured. If the pore size of the sampling membrane is too large, the collection amount of particulate matter will be greatly increased. reduce

In addition, during the long-term sampling process, there are continuous particles blocking the membrane pores, which will cause the pore size of the sampling membrane to become smaller and smaller with the increase of sampling time, and the air resistance will become larger and larger, which will also affect the collected PM. 10 and PM 2.5 make an impact

[0005] The traditional sampler must pre-treat the sampling film before sampling. Generally, it should be placed in a muffle furnace at a temperature of 500 ° C for 4 hours and then placed in a thermostat for 24 hours to remove moisture and other volatile components from the sampling film. Place in a sealed, low-temperature device before use to avoid moisture or contamination before sampling that will affect the accuracy of sampling

Images