HOLYBRO High Precision DroneCAN Airspeed Sensor - DLVR

HOLYBRO DroneCAN Airspeed – Precision Airspeed Sensor for UAVs and VTOL Systems

The HOLYBRO DroneCAN Airspeed is an industrial-grade differential pressure sensor designed for precise airspeed measurement in UAVs. The module is particularly suitable for fixed-wing aircraft, VTOL platforms and other unmanned aerial vehicles where reliable measurement of the aircraft's actual speed relative to the surrounding air is required.

The module uses a high-precision ALLSENSORS® DLVR differential pressure sensor featuring CoBeam technology. Depending on the version, the DroneCAN Airspeed is equipped with either a DLVR-L10D or DLVR-L20D sensor. This enables airspeed measurements of up to 226.8 km/h or 320 km/h respectively.

Communication with the flight controller is handled digitally via DroneCAN. The module operates with ArduPilot AP-Periph firmware and can be used with compatible flight controllers featuring a CAN interface and running PX4 or ArduPilot.

Precise Airspeed Measurement

Airspeed is determined by measuring the differential pressure between static and dynamic air pressure. In combination with the included Pitot tube, the sensor measures the dynamic pressure generated by the aircraft's movement through the surrounding air and provides precise airspeed data to the autopilot.

This information is particularly important for fixed-wing aircraft and VTOL systems. The flight controller can use the measured airspeed for flight control, navigation and the management of different flight phases.

Two Sensor Versions

The HOLYBRO DroneCAN Airspeed is available in two versions. The DLVR-L10D supports differential pressures up to 2500 Pa and airspeeds up to 226.8 km/h. The DLVR-L20D extends the measurement range to 5000 Pa and supports airspeeds up to 320 km/h.

ALLSENSORS DLVR Differential Pressure Sensor

The integrated DLVR sensors from ALLSENSORS are based on CoBeam technology and are designed for high-precision differential pressure measurements. Low temperature drift supports reliable measurements across a wide operating temperature range.

The specified measurement error is less than 1%. This makes the sensor suitable for demanding UAV applications where reliable airspeed data is required for flight control.

DroneCAN Communication

Measurement data is transmitted via the DroneCAN protocol. CAN-based communication provides a robust digital connection between the airspeed sensor and flight controller and is particularly suitable for more complex UAV system architectures.

• Digital airspeed data transmission via DroneCAN
• AP-Periph DroneCAN firmware
• Compatible with PX4
• Compatible with ArduPilot
• No additional UART port required
• Integration via the flight controller's CAN bus
• Software-controlled CAN termination

STM32G473 Microcontroller

Sensor data processing and DroneCAN communication are handled by a powerful STM32G473CE microcontroller. It operates at a clock frequency of up to 170 MHz and provides 128 KB RAM and 512 KB Flash memory.

• MCU: STM32G473CE
• Clock Frequency: 170 MHz
• RAM: 128 KB
• Flash Memory: 512 KB

AP-Periph Firmware

The HOLYBRO DroneCAN Airspeed uses ArduPilot AP-Periph firmware. AP-Periph enables the integration of various sensors and peripheral devices as DroneCAN nodes and manages communication with the primary flight controller.

Compatible with PX4 and ArduPilot

The sensor can be used with compatible flight controllers featuring a CAN interface and operating with PX4 or ArduPilot. This makes the DroneCAN Airspeed suitable for a wide range of professional autopilot and development platforms.

Robust Aluminum Enclosure

The electronics are housed in a compact aluminum enclosure. This protects the integrated components while supporting mechanically robust integration into UAV platforms.

Software-Controlled CAN Termination

The CAN termination resistor can be enabled or disabled via software. This allows the airspeed sensor to be configured according to its position within the CAN bus system without requiring hardware modifications.

Features

• Industrial-grade DroneCAN airspeed sensor
• Precise differential pressure measurement
• ALLSENSORS DLVR sensor with CoBeam technology
• Available with DLVR-L10D or DLVR-L20D
• Up to 2500 Pa measurement range with DLVR-L10D
• Up to 5000 Pa measurement range with DLVR-L20D
• Airspeed measurement up to 226.8 km/h with DLVR-L10D
• Airspeed measurement up to 320 km/h with DLVR-L20D
• Measurement error below 1%
• Low temperature drift
• DroneCAN communication
• AP-Periph firmware
• Compatible with PX4 and ArduPilot
• STM32G473CE microcontroller
• Software-controlled CAN termination
• Robust aluminum enclosure
• Suitable for fixed-wing aircraft and VTOL systems

Technical Specifications

• Product: HOLYBRO DroneCAN Airspeed
• Sensor Type: Differential pressure sensor / airspeed sensor
• Sensor: DLVR-L10D or DLVR-L20D
• Sensor Manufacturer: ALLSENSORS
• Technology: CoBeam
• Pressure Range DLVR-L10D: 2500 Pa
• Pressure Range DLVR-L20D: 5000 Pa
• Burst Pressure DLVR-L10D: 75 kPa
• Burst Pressure DLVR-L20D: 125 kPa
• Airspeed DLVR-L10D: 0–226.8 km/h
• Airspeed DLVR-L20D: 0–320 km/h
• Accuracy: < 1.0% measurement error
• MCU: STM32G473CE
• Clock Frequency: 170 MHz
• RAM: 128 KB
• Flash Memory: 512 KB
• Firmware: AP-Periph DroneCAN
• Communication Protocol: DroneCAN
• Compatibility: PX4 and ArduPilot
• Operating Voltage: 4.75–5.25 V
• Current Consumption: approx. 100 mA
• Operating Temperature: -20 °C to +85 °C
• CAN Termination: software-controlled

Dimensions and Weight

• Sensor Module: 29 × 35.5 × 16.5 mm
• Pitot Tube: 91.5 × 28 × 30 mm
• Weight: 38.3 g including Pitot tube and tubing

For Fixed-Wing Aircraft and VTOL Systems

The HOLYBRO DroneCAN Airspeed is particularly suitable for fixed-wing aircraft and VTOL platforms where the actual speed relative to the surrounding air is an important parameter for flight control. Unlike ground speed determined from GNSS data, airspeed measurement takes into account the aircraft's movement relative to the surrounding air mass.

When used with a compatible autopilot, airspeed measurement can contribute to more precise control across different flight conditions and provides an important sensor input for professional and autonomous fixed-wing and VTOL platforms.