OptoAHRS-II – Optical AHRS
The OptoAHRS-II is a low-SWaP AHRS solution that combines inertial sensing with optical image tracking, providing a robust orientation data capability with resilience against changes in magnetic interferences in the local operating environment.
The system uses reference images, such as pictures of the horizon or nearby environment, and fuses these visual features into the overall solution to create a self-checking and self-calibrating system. With just one known reference direction, the OptoAHRS-II can be operated immediately without the need for any magnetic calibration.
Key features & functionality:- OptoAHRSTM-II eliminates large errors inherent with Digital Magnetic Compass technology
- Hybrid North Finding and North Keeping System
- Real-time optical and inertial sensors orientation tracking
- Highly accurate, sensitive, and temperature stable Fluxgate magnetometers (in-house technology)
- Advanced, extendable, embedded Kalman Filter based sensor fusion algorithms
- Embedded 2D and 3D magnetic calibration on hard and soft iron
- Environmentally sealed (IP67)
| Dimensions | 172.2 x 80.5 x 55 mm |
| Weight | 784g |
| Power | 9-18 VDC, 2W (idle)/5.5W (operational) |
| Output Data Rate | 100 Hz |
| Gyro Bias In-Run Stability | 1 deg/hr |
| Accel Bias In-Run Stability | 0.005 mg |
| Magnetometer Bias In-Run Stability | 0.1 nT |
| Heading Accuracy | 0.2 deg |
| Pitch & Roll Accuracy | 0.05 deg |
