Product overview
Wuxi Beiwei Sensing Technology’s BW-AH227 Modbus is a low-cost attitude and heading reference system for integration into unmanned aircraft, unmanned vehicles, robots and stabilization equipment. Its sensing architecture includes a gyroscope and a three-axis accelerometer, with roll and pitch accuracy of 0.5° and heading accuracy of 0.8°. The sensor package measures 60 × 59 × 29 mm and weighs 280g including its cable, providing concrete dimensions and mass for allocating installation space within a host system.
Integration uses a selectable RS232, RS485 or TTL output with the Modbus protocol. The unit provides pitch coverage of ±90º and roll coverage of ±180º; its gyroscope has a ±400°/sec range and 200Hz bandwidth, while the accelerometer range is ±3.6 g on each axis. Temperature compensation accompanies a -40°C to +85°C temperature range. Shock resistance is specified at 2000g for 0.5 ms, three times per axis. This configuration is an attitude reference sensor rather than a flight platform or airframe kit.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer | Wuxi Beiwei Sensing Technology |
| Model and product type | BW-AH227 Modbus low-cost attitude and heading reference system |
| Roll and pitch accuracy | 0.5° |
| Heading accuracy | 0.8° |
| Tilt range | Pitch ±90º; roll ±180º |
| Dimensions | L60 × W59 × H29 mm |
| Output and protocol | RS232/485/TTL selectable; Modbus protocolSelectable output interface. |
| Temperature range | -40°C to +85°CTemperature compensation. |
| Mean time between failures | ≥90000 hours |
| Electromagnetic compatibility | According to GBT17626 |
| Insulation resistance | ≥100 MΩ |
| Shock resistance | 2000g0.5 ms; 3 times per axis. |
| Weight | 280gIncluding cable. |
| Gyroscope resolution | 0.01°/sec |
| Gyroscope range | ±400°/sec |
| Gyroscope bias stability | 20 °/hFull temperature range; 10s, 1σ. |
| Gyroscope angular random walk coefficient | Less than 0.1 °/√h |
| Gyroscope scale factor nonlinearity | ≤100ppm1σ. |
| Gyroscope scale factor repeatability | ≤100ppm1σ. |
| Gyroscope bandwidth | 200Hz |
| Accelerometer range | ±3.6 gX, Y and Z axes. |
| Accelerometer bias stability at 100 seconds | 0.001mg25°C, 100s, 1σ. |
| Accelerometer bias stability at 10 seconds | 0.01mg25°C, 10s, 1σ. |
| Applications | Satellite tracking; unmanned vehicles; platform stabilization; underwater robot navigation; drilling equipment measurement and control; marine survey instruments; robot control; unmanned aircraft |
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