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1. Using infrared light scattering to measure the concentration of dust At present, there are many methods for measuring the concentration of dust at home and abroad, and the measurement methods can be divided into weighing, light scattering, β-ray and micro-oscillating balance. Among these methods, light scattering has the advantages of fast detection speed, good repeatability, and timely data processing, and is widely used in detecting the concentration of dust.   Light scattering refers...

With the development of human beings, air pollution caused by various factors has become more and more serious. To ensure people's quality of life, it is necessary to test the quality of the air in our living environment so that our life can reach a healthier standard. Sensors have gradually become an important application technology in detection. According to this, the principle of the air detection system is analyzed, and the sensor for detecting the quality of the air is mainly analyzed....

The status of air quality  Environmental pollution has always been a problem that cannot be postponed in China, and among these numerous environmental pollutions, air pollution is the most serious, so the detection of air quality is particularly important. At present, China is facing pollution of smoke from burning coal and photochemical smog, and air pollution is the main environmental pollution. Relevant experts in China have found that the air contains a lot of organic compounds, including...

Sources of indoor dust particles Studies have found that various living and office activities such as housework, walking, cooking, smoking, printing, and copying will increase the concentration of indoor dust particles. Various microorganisms that breed from people, pets, the surface of various indoor building materials, and the indoor environment are also sources of indoor particulate matter.   1) In the cooking process, 4.1±1.6mg of inhalable particulate matter is produced per minute,...

With the invasion of smog, dust and industrial waste gas, the quality of air is becoming more and more serious, and it is imperative to improve indoor air monitoring. In recent years, the national air quality has deteriorated, and people are paying more and more attention to the quality of air to take necessary measures in a timely manner, especially those living in densely populated areas of big cities.   CO2 sensors We all know that the content of carbon dioxide is a concern of many people....

The infrared light source radiates infrared light (Io), and after being absorbed by the gas such as CO2 to be detected in the gas chamber, the intensity of the infrared light reaching the infrared detector will decrease (I), and the C02 molecule will absorb the infrared light with a wavelength of 4.26um. Determine the values of constant parameters such as I0, u, L and the functional relationship between I and C, and then calculate the concentration C of the gas by collecting the corresponding values...

An atmospheric particle refers to particles with extremely small particle sizes, which is one of the most important factors affecting the climate and the environment in which human beings live. Industrial production and human activities are the main reasons for the increase in the concentration of atmospheric particles caused by the pollution of the atmospheric environment. The use of coal in China's energy consumption exceeds 70%. As the main energy source in China, the air pollution caused...

To verify the advantages of the proposed system detector in terms of efficiency, accuracy and comprehensive error of sensors, a simulation comparison experiment was carried out, and a comprehensive comparison was made between the intelligent sensors and the traditional sensor based on electrochemical methods and weighing methods. First, based on the three designs, 10 groups of comparative experiments were carried out under different degrees of air pollution, and the detection efficiency of various...

With the progress of industrialization, the scale of heavily polluting industries such as petroleum, chemical industry, electric power, and metallurgy continues to expand, and the related sewage treatment doesn’t meet the standard, resulting in an intensified trend of overall air pollution. Heating in winter in northern regions and the rapidly increasing number of motor vehicles has caused an increase in the concentration of particulate matter in the atmosphere. PM2.5 is fine particulate matter...

According to the standards of the Ministry of Environmental Protection of the People's Republic of China, all factories that produce fodder, cement, flour, wood and others need to use laser dust sensors. A dust sensor, as the name suggests, is an instrument for detecting the concentration of dust. It can be classified into PM2.5 sensors, PM10 sensors and TSP full dust sensors according to different sizes of dust.   Because the laser dust sensor can monitor the dust concentration in the...

Working underground in coal mines is dangerous, and there is a certain amount of productive dust in it. If it cannot be detected and treated in time, there may be different degrees of health hazards. The main rapid detection methods for dust are light scattering, β-ray, micro-weight balance, electrostatic induction and piezoelectric balance. Among them, the instrument of micro-weight balance is monopolized by a few American companies, with high prices and high maintenance costs; the instrument...

Infrared dust sensors Infrared LEDs are light-emitting diodes whose emission wavelengths are in the infrared range. The common wavelengths are generally around 850nm to 940nm. They are widely used in medical, security, communication, remote control and sensing fields. Since the emitting wavelength of infrared LED is outside the visible spectrum, with the receiver of a specific spectrum, the influence of ambient light on the received signal can be greatly reduced. Thanks to the continuous maturity...