“From the initial widespread smog, to the gradually realized PM2.5, PM10, to the indoor pollution source formaldehyde VOC, to atmospheric ozone pollution and so on. Every time a pollution “new term” appears, relevant experts and scholars will analyze in detail, from the origin to the development process to how it affects human health, and then give a series of protection suggestions. Next, let me take a look at the harm of smoking in the car with everyone. How to use sensors to detect whether someone is smoking in the car?

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What harm does smoking in the car bring?

From the initial widespread smog, to the gradually realized PM2.5, PM10, to the indoor pollution source formaldehyde VOC, to atmospheric ozone pollution and so on. Every time a pollution “new term” appears, relevant experts and scholars will analyze in detail, from the origin to the development process to how it affects human health, and then give a series of protection suggestions. Next, let me take a look at the harm of smoking in the car with everyone. How to use sensors to detect whether someone is smoking in the car?

For some “smokers”, smoking is as common as drinking water and eating. At the same time, there are also many car owners who love to smoke. , I smoke even when I’m feeling upset, and some people even think that smoking can relieve tired driving.

Perhaps tobacco does contain certain substances that can give people a “refreshing” effect, but the tar and harmful substances produced after the cigarettes are burned will instantly turn the car into a poisonous “room”. It is understood that when the vehicle is in a closed state, the vehicle itself will produce 8 common poisonous substances in the vehicle, namely benzene, toluene, xylene, ethylbenzene, styrene, formaldehyde, acetaldehyde, acrolein. At the same time, the car also contains air pollutants such as microorganisms and bacteria, and this type of pollution source alone is not small for the human body. In addition, smokers in the car often start the engine, and the engine itself produces harmful gases such as carbon monoxide when it is running. The point is that the decorations, cushions, etc. in the car are easy to absorb nicotine and tar. Once the car smokes , These substances are difficult to disperse, so the concentration of carbon monoxide in the car will exceed 30 times the normal value.

Simple results in dizziness, fatigue, disgust and other manifestations. In severe cases, poisoning may occur. Because carbon monoxide is a colorless, odorless, and non-irritating gas, the person involved can’t immediately notice it. It may be too late to take measures until the cognitive obstacles appear.

For example: How big is the PM2.5 value produced by smoking? Two sets of experiments were carried out at the Environmental Monitoring Central Station on the impact of indoor smoking.

① An elevator of about 2 square meters was selected for the experiment. When the elevator first entered the elevator, the staff used a portable particulate matter monitor to detect that the instantaneous value of PM2.5 was 81.3 micrograms/cubic meter. Less than 10 seconds after lighting a cigarette, the elevator room was filled with smoke, and the instrument data rose to 999 micrograms/cubic meter, an increase of more than 10 times.

② In an office of about 20 square meters, no one smokes in the room, and the instantaneous value of PM2.5 is 75.2 micrograms/m3. In order to test the effect of the experiment, the staff closed the doors and windows and lit two cigarettes at the same time. At this time, the PM2.5 value in the office soared to 416.3 micrograms/m3.After opening the doors and windows to exhaust the smoke, it took about 20 minutes for the PM2.5 value to return to about 75.2 micrograms/m3

Through experiments, we can see that PM2.5 is so high in a 20-square-meter office, not to mention that in a small car space, smoking a cigarette will produce a huge amount of pollutants, which not only contains the well-known nicotine and tar, but also There are also carbon monoxide and various irritating substances and carcinogens. Therefore, smoking PM2.5 in the car is more serious, and the car PM2.5 sensor is imperative. At present, many PM2.5 sensors and car air quality sensors are installed in car air conditioners or air purifiers. When the air is detected The increase in PM2.5 in China will be displayed on the Display or voice broadcast, and the car air conditioner or air purifier will be automatically turned on to give car owners a comfortable driving environment.

Of course, in order to improve the accuracy of the perception of the smoking environment in the car, a combination of multiple sensors is usually required to provide a stable and durable solution. The most typical one is the Japanese figaro laser particulate matter sensor PM2.5 sensor-TF-LP01. The TF-LP01 laser particulate matter sensor provided by Gongcai.com is a small module that uses the principle of scattering to detect dust particles in the air. It has the advantages of small size, high detection accuracy, good repeatability, good consistency, continuous collection of real-time response, strong anti-interference ability, ultra-quiet fan, and 100% detection and calibration of the sensor.

Concentration grade comparison table

Japan figaro laser particulate matter sensor PM2.5 sensor TF-LP01 parameters: