In recent years, automatic weather stations have been widely used with increasing attention to agricultural construction. For the relevant monitoring of agricultural weather, in order to provide more accurate plant protection response measures. However, the wind direction wind speed sensors of the wind direction recorder of the automatic weather station are prone to malfunctions, and it is necessary to analyze these fault conditions in combination with the concept of the wind elements and the experience to perform quick troubleshooting or sensor replacement.
The wind factor is determined by two parameters, namely the wind speed (modulus of the wind vector) and the wind direction (amplitude of the wind vector). The wind direction refers to the direction of the wind, and the symbol is represented by 16 positions. In the automatic observation, the north is used as the standard, and the clockwise rotation is used as the unit, and the integer is taken as the unit. The wind speed is the horizontal distance passed by the air mass per unit time. Take m/s as the unit and take 1 decimal place.
The induction components of the wind speed sensor wind speed sensor produced by the Changchun plant are also 3-cup components, and the signal conversion circuit is the Hall IC. Driven by horizontal wind, the wind cup assembly rotates, and the magnetic chuck is driven by the main shaft to rotate. The small magnets above it form a number of rotating magnetic fields. The Hall magnetic sensor induces a pulse signal whose frequency increases with the wind speed. Large and linear increase. The formula is: v = 0.1f, where v is the wind speed and the unit is m/s; f is the pulse frequency and the unit is Hz. Failure of the wind speed sensor: one is when the wind cup rotates, the collector does not indicate the value, and the possible causes of the failure are: 1 is mostly damaged by lightning or there is no 5V power supply; o the wind speed sensor and the collector 7-core cable interface appears loose and the cable has Damage water seepage; »The weather board UB1, D1, or UA6, UA7 is damaged.
The other is that occasionally one of the cups or cups is broken by external force, causing the starting wind speed to increase significantly, which is inconsistent with the actual wind speed. The third kind is due to acid corrosion in wet environment, so that the bearing rust rotation is not flexible, there is wind speed when the wind speed is large, when the wind speed is small, there is no wind speed, you can unscrew the cap nut of the wind speed sensor (note counterclockwise is tight, clockwise For loose), remove the air cup assembly, remove the rubber washer, remove the nut with a small wrench or a sharp nose pliers, remove the protective cover, add a few drops of indicator oil on the bearing, and slowly rotate for 1 week to change the status quo. Special note: Since the bearing removal under the wind speed sensor of the wind direction wind speed recorder is complex and needs professionals to complete, otherwise it is easy to increase the human error, so this part cannot be disassembled and maintained by itself.
Only with a thorough understanding of the failure of the wind direction recorder, can the timely lifting of the fault be able to ensure that the work of the wind direction anemometer can be continuously carried out, and the data to be monitored is continuous, so as to ensure the agricultural measures Accurate, to ensure the normal growth of the crop.
The wind factor is determined by two parameters, namely the wind speed (modulus of the wind vector) and the wind direction (amplitude of the wind vector). The wind direction refers to the direction of the wind, and the symbol is represented by 16 positions. In the automatic observation, the north is used as the standard, and the clockwise rotation is used as the unit, and the integer is taken as the unit. The wind speed is the horizontal distance passed by the air mass per unit time. Take m/s as the unit and take 1 decimal place.
The induction components of the wind speed sensor wind speed sensor produced by the Changchun plant are also 3-cup components, and the signal conversion circuit is the Hall IC. Driven by horizontal wind, the wind cup assembly rotates, and the magnetic chuck is driven by the main shaft to rotate. The small magnets above it form a number of rotating magnetic fields. The Hall magnetic sensor induces a pulse signal whose frequency increases with the wind speed. Large and linear increase. The formula is: v = 0.1f, where v is the wind speed and the unit is m/s; f is the pulse frequency and the unit is Hz. Failure of the wind speed sensor: one is when the wind cup rotates, the collector does not indicate the value, and the possible causes of the failure are: 1 is mostly damaged by lightning or there is no 5V power supply; o the wind speed sensor and the collector 7-core cable interface appears loose and the cable has Damage water seepage; »The weather board UB1, D1, or UA6, UA7 is damaged.
The other is that occasionally one of the cups or cups is broken by external force, causing the starting wind speed to increase significantly, which is inconsistent with the actual wind speed. The third kind is due to acid corrosion in wet environment, so that the bearing rust rotation is not flexible, there is wind speed when the wind speed is large, when the wind speed is small, there is no wind speed, you can unscrew the cap nut of the wind speed sensor (note counterclockwise is tight, clockwise For loose), remove the air cup assembly, remove the rubber washer, remove the nut with a small wrench or a sharp nose pliers, remove the protective cover, add a few drops of indicator oil on the bearing, and slowly rotate for 1 week to change the status quo. Special note: Since the bearing removal under the wind speed sensor of the wind direction wind speed recorder is complex and needs professionals to complete, otherwise it is easy to increase the human error, so this part cannot be disassembled and maintained by itself.
Only with a thorough understanding of the failure of the wind direction recorder, can the timely lifting of the fault be able to ensure that the work of the wind direction anemometer can be continuously carried out, and the data to be monitored is continuous, so as to ensure the agricultural measures Accurate, to ensure the normal growth of the crop.