I am building a DIY weather station and have a couple questions. One, I am using a hall effect sensor for the anemometer and I am wondering if that will require debouncing. My next question has to do with calibrating the anemeometer. I am wondering how to calculate the calibration factor. My thinking is that you need to measure the circumference at the radius point where the hall sensor is to get the distance traveled per revolution. That distance may vary depending how far out from he center your hall sensor is mounted. The issue is that in researching this, I have seen some people on forum posts that have said that you need to use the circumference where the wind cups are and not where the sensor is, which doesn't seem to be correct to me. Once I know which is correct, I should be able to figure out the rest. For my wind direction vane, I am using the AS5047D-EK-AB which is a rotary position sensor that is connected through an SPI bus. That should be fairly straight forward to connect and get a reading from. I will just have to point the device north using a compass and take a position reading that I can then use as an offset value to the position to get the exact wind direction.
meters per second / pulse per second = meters * seconds / pulse * seconds = meters / pulse same for miles per hour / pulse per second = C* miles /pulse
An old HDD motor + rectifier does a great job as an anemometer core component.
I am building a DIY weather station and have a couple questions. One, I am using a hall effect sensor for the anemometer and I am wondering if that will require debouncing. My next question has to do with calibrating the anemeometer. I am wondering how to calculate the calibration factor. My thinking is that you need to measure the circumference at the radius point where the hall sensor is to get the distance traveled per revolution. That distance may vary depending how far out from he center your hall sensor is mounted. The issue is that in researching this, I have seen some people on forum posts that have said that you need to use the circumference where the wind cups are and not where the sensor is, which doesn't seem to be correct to me. Once I know which is correct, I should be able to figure out the rest.
For my wind direction vane, I am using the AS5047D-EK-AB which is a rotary position sensor that is connected through an SPI bus. That should be fairly straight forward to connect and get a reading from. I will just have to point the device north using a compass and take a position reading that I can then use as an offset value to the position to get the exact wind direction.
meters per second / pulse per second = meters * seconds / pulse * seconds = meters / pulse
same for miles per hour / pulse per second = C* miles /pulse