In today’s society, the subway develops rapidly and has become the most important means of transportation for people to take short trips. Environmental sensors are playing a more and more important role in the subway. Environmental sensors such as temperature and humidity sensors, carbon dioxide sensors and PM2.5 dust sensors can ensure that the air quality in the subway station and in the subway station is always in good condition.
Subway is usually underground, and the flow of people is very large, environmental parameter monitoring is very important, related to people’s life safety and health. Subway environmental control system is an important means to maintain the stable and safe air in the subway station and on the subway. Among them, the air conditioning and ventilation system is in long-term operation and consumes a lot of power, accounting for about 40% of the power consumption of the whole subway.
Maybe we all have such experience: during rush hour, when riding the subway, we will feel dizzy. It is because of too much carbon dioxide and insufficient oxygen, which makes us feel uncomfortable. When the person is little, can feel chilly, a lot of people can feel how to open so big air conditioning, cold dead. In fact, the traditional subway environmental control system is just a fool-type continuous cooling and exhaust air. The cooling capacity and exhaust air capacity are almost constant all the time. When there are more people, the effect will be poor, but when there are fewer people, the effect will be very good.
The application of modern sensors makes the subway environmental control system intelligent and humanized. It can monitor the temperature and humidity, CO2 content, PM2.5 and other parameters in the subway environment in real time, and intelligantly adjust the cooling capacity and exhaust air volume, so as to create a comfortable environment for everyone. This greatly optimizes the energy saving of the system. As an indispensable part of the control system, the application of environmental sensors in subway is becoming more and more important.
Application of temperature and humidity sensors in subway environment
The subway passenger flow is large and the new air volume required varies greatly. Therefore, the air conditioning load of the subway changes greatly, so the energy saving must be realized by means of automatic control.
In this regard, indoor temperature and humidity sensors can be set up in the station hall and platform area of subway stations, on the subway, important equipment room and other occasions, so as to monitor the real-time temperature and humidity of the station. According to these parameters, the subway environmental control system can reasonably adjust the working conditions of the stations to keep these places in a comfortable environment. In addition, it can also be shown to passengers on the screen, so that passengers can understand the current environment temperature and humidity.
Application of CARBON dioxide sensors in subway environment
In addition, carbon dioxide sensors can be installed in the air return room of stations and in the subway to monitor the concentration of carbon dioxide in stations. In the station, due to human breathing, the concentration of carbon dioxide will increase. When the concentration of carbon dioxide is at a high value, the current station air quality poses a threat to the health of passengers. Therefore, the subway environmental control system can timely adjust the working conditions in the public area of the station according to the data collected by the CARBON dioxide sensor, so as to ensure the good air quality of the station. That way, we won’t feel dizzy from lack of oxygen.
Application of PM2.5 sensor in subway environment
Usually indoor PM2.5 particulate pollution is also very serious, especially when there are too many people, but it is invisible, we cannot understand its specific situation, but it is very harmful to human body. The development of PM2.5 sensors allows people to see PM2.5 in the subway more directly. At the same time, the subway environmental control system can monitor these parameters all the time. Once exceeding the limit, the exhaust ventilation or air purification system can be intelligently started to improve the air quality in the station and subway. So, PM2.5 sensor is also very important, now we pay attention to PM2.5, all the subway is often measured PM2.5 value, of course, if there is a need to measure PM1.0 and PM10.
Post time: Aug-13-2020
