The wind speed and direction sensor tells you: Why can't the airport bid farewell to say 'a good voyage'?
The word 'good voyage' is the most accustomed word to say goodbye to express your wishes, but when you arrive at the airport, someone who knows a little bit will never say 'good voyageCan't people say a good journey? I have read a sentence of chicken soup: 'If you feel that everything is against you, it doesn’t matter, because the plane takes off in a headwind.' Although this is a chicken soup, one thing is true: the plane does take off against the wind. . Knock on the blackboard~the point of knowledge is here~Wind is a common natural phenomenon, and airplanes often take off and land under windy conditions. But all planes are most afraid of tailwinds when taking off and landing. For aircraft flight safety, the most dangerous period is the take-off and landing of the aircraft. The speed of the aircraft during take-off and landing is relatively slow and its stability is poor. If it encounters strong crosswinds or unstable tailwinds, the aircraft is likely to be skewed and tilted, making it difficult to control. Because wind affects the aircraft's attitude angle, flight speed, and taxi distance, and affects the safety of passengers, when the wind speed and direction are not conducive to the flight, the navigation will be cancelled. Just like flying a kite, when we first start flying a kite, we always drag the kite to run a certain distance against the wind. The purpose is to increase the speed of the kite relative to the air, so that it can get more lift and rise faster. Similarly, when the plane takes off. If there is wind blowing on the face, under the same speed conditions, the lift it obtains is greater than when there is no wind or downwind, so it can take off faster off the ground. When landing in the wind, you can use the resistance of the wind to reduce the speed of some aircraft, so that the distance of the aircraft after landing is reduced. Therefore, taking off and landing in a headwind environment can allow the aircraft to obtain better lift or drag, which is easy to control. Generally, the smooth and safe takeoff and landing of the aircraft is carried out in the headwind state. In order to avoid this kind of danger, all airport runways should choose the upwind direction according to the prevailing local wind direction. One is to shorten the taxiing distance of the aircraft taking off or landing, and the other is relatively safe. In all the meteorological elements observed at the airport, the data of ground wind speed and direction has a greater impact on the take-off and landing of the aircraft. When the aircraft takes off or landing at the airport, the wind speed and wind direction on the ground not only affect the stability of the aircraft operation, but also It affects the length of the aircraft's taxiing distance on the runway, which is directly related to the safety of the entire flight activity. In this regard, real-time monitoring of wind speed and direction to ensure the operational safety of airport ground aircraft is the top priority in airport weather monitoring. In the past when technology was underdeveloped, windsocks were still used to monitor wind speed and direction to estimate wind speed. This method has poor measurement accuracy, low automation, and inconvenience in actual use. Compared to the wind direction. At present, mechanical wind speed and direction sensors are more intelligent. The wind speed and direction sensors at home and abroad can be divided into three categories: One is the propeller-type wind direction and wind speed sensor. The propeller-type wind sensor has poor accuracy and average dynamic performance. The second is a three-cup type wind speed and a single-wing wind direction sensor. The operation of the three-cup sensor is more suitable. Most of the wind speed and direction sensors are measured by this sensor. The sensing element of the wind speed sensor is a three-cup turret, and the signal conversion circuit is a Hall switch circuit. Under the action of horizontal wind, the wind cup group rotates, and the main sleeve drives the magnetic rod disk to rotate. The third is an ultrasonic wind speed and direction sensor. Ultrasonic wind speed and direction sensors mainly use the ultrasonic time difference method to measure wind speed and direction. However, at present, the application of ultrasonic wind speed and direction sensors is not yet mature. The low-altitude monitoring of the wind direction and wind speed of the airport can be simply recorded by the wind speed and wind direction sensor, but the monitoring of the wind direction and wind speed in the high altitude must be selected separately.
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