9-axis attitude and heading reference system BDA446

miniaturelightweight

Product description
BDA446 is a compact, industry-oriented dynamic attitude sensor providing real-time attitude, three-axis acceleration and three-axis gyroscope outputs via Bluetooth. It fuses a three-axis gyroscope with three-axis accelerometer and three-axis magnetometer data using Kalman filtering and temperature compensation to deliver stable attitude information across all orientations. Bluetooth 5.1 (BLE) with adaptive frequency hopping is used for wireless output and supports BLE DFU for firmware updates. System parameters are configurable to suit various application platforms.

Key features

• Integrated nine-axis sensor plus temperature sensor
• Bluetooth 5.1 wireless output (BLE) with adaptive frequency hopping
• Maximum update rate: 100 Hz
• Solar-power support and DC battery input (3.0–4.2 V)
• Outputs: attitude (roll, pitch, azimuth), three-axis acceleration, three-axis gyroscope
• BLE DFU firmware upgrade supported

Scope of application

• Engineering vehicle leveling and control
• Bridge and dam tilt/position monitoring
• Precision instrument leveling and control
• Medical device angle control
• Underground drilling rig attitude navigation
• Railway gauge and track measurement
• Inclination-based orientation measurement
• Geological equipment tilt monitoring

Dimensions

• Enclosure size: L108 × W82 × H61 mm
• Installation footprint: L94 × W56 × H6 mm
• Mounting: 4 × M5 screws

Specifications

• Model: BDA446 (BDA446T referenced in detailed specs)
• Measurement ranges: Roll ±180°, Pitch ±90°, Azimuth ±180° (initial power-down value = 0°)
• Measurement axes: X / Y / Z
• Roll & Pitch static accuracy (@25°C): ±0.05°
• Roll & Pitch dynamic accuracy (rms @25°C): ±0.1°
• Gyroscope range: ±300°/s
• Gyro zero bias stability (10 s smoothing): 8.5°/h
• Gyro angle random walk (Allan): 0.25°/√h
• Accelerometer range: ±4 g or ±16 g (configurable)
• Acceleration bias stability (10 s mean): 0.1 mg
• Acceleration bias instability (Allan): 0.005 mg
• Speed random walk coefficient (Allan): 0.005 m/s/√h
• Temperature coefficients: zero point ±0.01°/°C (-20 to 65°C); sensitivity ≤100 ppm/°C
• Power-on startup time: ≤3.5 s; response time: 0.01 s
• Electromagnetic compatibility: per EN61000 and GBT17626
• Reception sensitivity: -96 dBm; transmit power: 8 dBm
• Bluetooth transmission distance: up to 40 m line-of-sight
• Battery runtime: typically ~30 days (25°C, 8 h/day active, 16 h/day sleep)
• Insulation resistance: ≥100 MΩ
• Shock resistance: 100 g @ 11 ms, triaxial (half-sine)
• Vibration: 10 grms, 10–1000 Hz
• Ingress protection: IP67
• Housing: ABS plastic; weight: ≤570 g (excluding cable)

Technical characteristics

• Sensor: integrated 9-axis + temperature
• Data outputs and formats configurable for integration with industrial platforms
• Power: DC 3.0–4.2 V (battery), solar power supported
• Firmware: BLE DFU for remote updates
• Mechanical: compact ABS enclosure with M5 mounting; designed for harsh environments (IP67, shock, vibration)