Original SIYI MS4525 Airspeed Meter Sensor Precision Measurement Reliable Component Safety Assurance Stall Prevention

Chapter 2 Installation and fixing

Use double-sided adhesive tape to paste the MS4525 Airspeed
Sensor at the required position. The pitot tube should be installed in the
airflow direction of the UAV (the nose or the left and right wings), with
the air hole facing the front of the flight and away from the propeller to
prevent the propeller from rotating

parameter settings

The airspeed sensor can be operated normally only after the flight
control device is brushed into the ArduPlane (Fixed-Wing UAV firmware). Airspeed sensors are not supported on vehicles other than Fixed-Wing UAVs. ARSPD_TYPE = 1 Configured Airspeed Sensor Type = I2C-MS4525D0
ARSPD_USE = 1 Configure whether the airspeed count value is used for actual flight control
ARSPD_BUS = 1 Airspeed Sensor I2C bus selection, generally the default is 1 After configuring the above parameters, restart the flight control, and observe whether there is any change in the airspeed value on the ground station. If there is any change, it means that the flight control has identified the airspeed sensor.

Airspeed Sensor static calibration

Airspeed static calibration must be performed before each takeoff. Cover the pitot tube with your hand to block the effect of natural wind on the Airspeed Sensor, but do not block the Airspeed Sensor completely

Select "PREFLIGHT CALIBRATE" in the MissionPlanner and click "Execute Action" to start calibration;

After the calibration is completed, the calibration complete text will be displayed in the "Message" column. Represents that the Airspeed Sensor is statically calibrated.

Airspeed Sensor Dynamic Calibration

ARSPD_AUTOCAL = 1 in all parameter table, write and save, and restart flight control. After restarting flight control, take off the airplane. Use the Loiter flight mode to automatically hover in the air for more than ten minutes. During the hover, the flight control will prompt to reset the
Airspd ratio parameter. It means the flight control has completed the dynamic calibration. Check whether the ARSPD_RATIO value is within
1~3 after landing. If the ARSPD_RATIO is out of the range of 1 to 3, check the Airspeed Sensor pitot for normal installation or foreign matter. You need to change the ARSPD_AUTOCAL to 0 after calibration.