Product overview
The BWSENSING BW-IMU127 is a low-cost Modbus inertial measurement unit for integration into unmanned aircraft, robotic equipment and stabilization systems. Its sensing architecture combines a gyroscope with an accelerometer specified across the X, Y and Z axes. Overall dimensions are L55×W37×H24mm, while the main board measures L33×W27×H6mm, providing two distinct dimensions for installation planning. Electrical integration requires a 5–12V DC supply, with selectable RS232, RS485 or TTL interface output.
The gyroscope measures angular rates within ±500°/sec at 0.01°/sec resolution, while the accelerometer offers ±2g measurement with an optional ±16g range and 0.01mg resolution. Temperature, dynamic and orthogonality compensation are included, and operating temperature spans -40°C to +85°C. Bias stability depends on the stated measurement interval: gyroscope figures apply at room temperature, while accelerometer figures apply at 25°C. Procurement configuration therefore includes a choice of interface output and, where required, the optional accelerometer range.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity and type | BWSENSING BW-IMU127 low-cost Modbus inertial measurement unit |
| Interfaces | RS232 / RS485 / TTLSelectable interface output. |
| Overall dimensions | L55×W37×H24mm |
| Board dimensions | L33×W27×H6 mmMain board. |
| Supply voltage | 5–12V DC |
| Operating temperature | -40°C to +85°C |
| Temperature compensation | Temperature compensationTemperature range: -40°C to +85°C. |
| Additional compensation | Dynamic compensation and orthogonality compensation |
| Gyroscope bias | 100°/h |
| Gyroscope resolution | 0.01°/sec |
| Gyroscope measurement range | ±500°/sec |
| Gyroscope bias stability | Less than 2°/h (100s, 1σ); less than 100°/h (10s, 1σ)Room temperature; 100s, 1σ and 10s, 1σ, respectively. |
| Gyroscope angle random walk coefficient | Less than 0.1 °/√h |
| Gyroscope bias repeatability | Less than 50°/h (1σ)1σ. |
| Gyroscope scale factor nonlinearity | ≤100ppm (1σ)1σ. |
| Accelerometer measurement range | X, Y, Z: ±2g; optional ±16gX, Y and Z axes; optional ±16g range. |
| Accelerometer resolution | 0.01mg |
| Accelerometer bias stability | 1mg (25°C, 100s, 1σ); 10mg (25°C, 10s, 1σ)25°C; 100s, 1σ and 10s, 1σ, respectively. |
| Applications | Unmanned vessels and underwater robots; construction machinery; platform stabilization; automated guided vehicles; heavy trucks; autonomous driving; robotics; unmanned aircraft |
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