SKYE2 Airspeed sensor
SKYE 2 Nano does not have a heater function.
Feature
- The DLVR airspeed sensor using dual-wafer technology has the characteristics of high accuracy and good linearity.
- It supports up to 226.8KM/h airspeed measurement, meeting the needs of most UAV applications.
- Self-developed M4C software architecture, rapid upgrade and customization
- DroneCan protocol, supports PX4 and ArduPilot platforms
- Aviation aluminum alloy shell is strong and reliable
Detasheet
| SKYE2 NANO | |
| mcu | STM32F4 100MHz |
| Sensor | DLVR_L10D |
| airspeed measurement | 0-226.8km/h |
| Error | 0.01 |
| Protocol | DroneCan |
| Compatible controller | ArduPilot/PX4（CUAV/Pixhawk eg.） |
| Operating Voltage | 4.75-5.3V |
| Operating temperature | -20 to 85℃ |
| Shell material | Aviation aluminum alloy |
| Weight | 15g |
Pinouts
Connect
Skye 2 Nano Quick Start Guide(ArduPilot）
The setup and configuration described in this chapter apply when using the Skye2 Nano with a controller running ArduPilot firmware.
Enable
Run Mission Planner and go to the Config > FULL Parameter List interface to set the following parameters and then restart the vehicle.
//If connected to CAN1
- CAN_P1_DRIVER=1
- CAN_D1_PROTOCOL=1
//If connected to CAN2
- CAN_P2_DRIVER=1
- CAN_D2_PROTOCOL=1
//Set the airspeed sensor type to UAVCAN and enable it.
- ARSPD_TYPE=8
- ARSPD_USE=1
Airspeed offset calibration
When there is no wind and the airspeed display is greater than 3m/s, please reset the airspeed to zero before taking off.
- Run the Mission planner software and connect the flight controller
- Make sure the pitot tube is in a windless environment
- Open Mission planner>Flight data>Action bar
- Select “Preflight Calibration” in the first check box; click the “Perform Action” button on the right
Pre-flight inspection
Before flying, please connect to the ground station to check that there is no wind and ensure that the airspeed value is within the range of 0~3m/s (if it exceeds the range, need perform airspeed offset calibration)
- Hold the pitot tube with your hand and blow air into the pitot tube. If the airspeed value changes according to the airflow speed, the inspection is complete.
Airspeed calibration
The airspeed ratio of different installations and individual airspeed gauges will be somewhat different. The airspeed gauge needs to be calibrated on the first flight.
//Enable automatic airspeed calibration
- ARSPD_AUTOCAL=1
Perform calibration (choose one of the following two methods)：
- A: Lift off in QStabilize or QLoiter multi-axis mode and convert to FBWA (self-stabilizing A mode) to control the drone to fly and hover for about 5 circles. After the ground station message bar prompts that the calibration is completed, execute the landing. After the calibration is completed Set ARSPD_AUTOCAL to 0.
- B: If you don’t know how to fly in FBWA mode, you can fly with the airspeed sensor enabled but not using it (ARSPD_USE=1; ARSPD_TYPE=8; do not fly in a windy environment Perform this operation); the aircraft will fly using ground speed (relative ground speed), and use Loiter mode to hover for about 5 circles after takeoff. The ground station message bar prompts that after the calibration is completed, perform landing. After the calibration is completed, set ARSPD_AUTOCAL to 0.
Skye2 NANO Quick Start Guide(ArduPilot)
The setup and configuration described in this chapter apply when using the Skye 2 NANO with a controller running PX4 firmware.
Enable
Run QgroundControl>, set the following parameters to save and restart the vehicle.
- UAVCNN_ENABLE Set to
Sensors automatic Config - Reboot
- UAVCAN_SUB_ASPD Set to
Enable - UAVCAN_SUB_DPRES Set to
Enable - Reboot
Multiple Airspeed Sensors
If you have multiple airspeed sensors then you can select which sensor is preferred as the primary source using ASPD_PRIMARY, where 1, 2 and 3 reflect the order in which the airspeed sensors were started:
- 0: Synthetic airspeed estimation (groundspeed minus windspeed)
- 1: First airspeed sensor started (default)
- 2: Second airspeed sensor started
3: Third airspeed sensor started
The airspeed selector validates the indicated sensor first and only falls back to other sensors if the indicated sensor fails airspeed checks (ASPD_DO_CHECKS is used to configure the checks).
The selected sensor is then used to supply data to the estimator (EKF2) and the controllers.
Performing the Calibration
- Select “Q” icon > Vehicle Setup > Sensors (sidebar) to open Sensor Setup.
- Click the Airspeed sensor button.
- Shield the sensor from the wind (i.e. cup it with your hand). Take care not to block any of its holes.
- Click OK to start the calibration.
- Once asked for, blow into the tip of the pitot tube to signal the end of calibration.
Blowing into the tube is also a basic check that the dynamic and static ports are installed correctly. If they are swapped then the sensor will read a large negative differential pressure when you blow into the tube, and the calibration will abort with an error.
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