Do not know if you have noticed that when the fire brigade is performing its mission, there will always be a fire command vehicle in several fire engines? In fact, it and other fire engines are not very different, they are generally used in red and white colors, but the fire command vehicle gathers more functions in one. Below, I will give you a brief introduction to the function of the fire command vehicle. In general, its function is to better realize the overall command and information transfer through the various functions it has in the fire scene as well as in the rescue scene. It can be similarly said that it is equivalent to a move in the fire rescue process. The command platform makes it possible to carry out rescue operations in the shortest possible time with maximum efficiency, which sounds good. First of all, its biggest difference from ordinary fire engines is its command role. Of course, the function and structure are compatible. This fire command vehicle has a variety of information media such as car telephones, satellite phones, and radio stations, and it can be used in conjunction with positioning systems and network systems to facilitate rescue operations quickly and easily. The on-site command makes the work orderly; In addition, this fire command vehicle also has equipment such as a roof camera and a video recorder, which can record and analyze the situation on the spot in time to facilitate better implementation of the rescue according to the actual situation. Of course, it is also equipped with a computer system that can communicate with each other at any time and is very convenient for advanced functions. Of course, the most important alarm system for firefighting work is also indispensable, and it can be alerted at any time according to the change of fire, which is very smart and avoids many problems that people subjectively ignore because of panic and neglect some small local fires. It is such a kind of fire command vehicle that integrates information collection and transmission, camera, command and GPS positioning. It facilitates the proper and effective conduct of firefighting work, and solves the greatest possible problems with the most reasonable force. At present, almost all firefighting teams have been equipped with such a fire command vehicle. Advanced technology helps human life in a more convenient way.
Why is the air dry in winter?
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What we call humidity is divided into two kinds, absolute humidity and relative humidity.
Absolute humidity refers to the amount of water molecules per cubic meter of air.
Relative humidity refers to the ratio between "absolute humidity" and "saturation humidity".
"Saturation humidity" refers to the absolute humidity required for the water vapor in the atmosphere to reach saturation at a certain temperature. Saturation humidity is also closely related to temperature. The higher the temperature, the greater its value.
The drying or wetting we usually feel does not have a great relationship with absolute humidity, but mainly depends on relative humidity. Therefore, this issue should be discussed as follows:
On the one hand, when the temperature is low in winter and the saturated vapor pressure is small, the absolute humidity of the air is small.
On the other hand, when the temperature is low in winter, the value of saturated humidity is also small. When the absolute humidity is the same, the relative humidity is greater.
Generally speaking, there are positive and negative effects of temperature on humidity. Which role plays a major role should be discussed according to the actual situation.
In some areas it gets dry in winter, while in others it may get wet. The temperature is low in winter. Even if the relative humidity is 100%, the water vapor content is still very low. After we inhale air, the air is heated to body temperature, and the relative humidity will become very low, so we will feel dry. The air we exhale is basically saturated steam at body temperature, so we consume a lot of water when we breathe.
The air near the skin will also be heated, so the moisture of the skin is also easy to evaporate
The doctor suggested that an Aroma Diffuser should be placed indoors, which can effectively and immediately solve the problem of indoor air drying, humidify the air and solve the problem of air drying. The ultrasonic aroma diffuser should be used, and the fog should be sprayed out through vibration