STRAPDOWN HEADING REFERENCE
SHR-360
SHR-360
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Features:
- Solid State, Strapdown System
- Low Cost, Low Power
- Rugged, High Reliability
- Vibration Resistant
- Analog and RS-232 Serial Outputs
- PC Heading Calibration
- Two Year Limited Warranty
- Engineering Support
The SHR-360 provides heading and sensor information. It includes a high accuracy triaxial fluxgate magnetometer and a triaxial accelerometer. This unit is a "strapdown" or "body-axis" sensor. The sensitive axes of the magnetometer (like the accelerometers) will stay at a constant relationship with the vehicle and move as the vehicle moves. Since the fluxgate sensors rotate with the unit, the unit must use its angle sensors to calculate the rotation back to level. The function is similar to a mechanical gimbal except that the rotations are done using software. The SHR-360 has several advantages over using a traditional gimbal including: no bearings to wear out, no fluid to leak and high shock survivability.
The Watson Industries strapdown solution provides a better magnetic heading than other magnetic heading products using mechanical gimbals. A significant problem with mechanically gimbaled compasses becomes apparent when trying to calibrate the heading sensor in the field. With a strapdown system, the magnetometers are fixed with respect to the vehicle in which it is mounted; Therefore, the constant soft and hard iron field distortions can be fully calibrated out.
Strapdown systems provide superior performance in installations including automobiles, ships, buoys and aircraft.
Specifications | |||
Attitude | |||
| Range: Bank | ±180° | ||
| Range: Elevation | ±90° | ||
| Resolution: | 0.02° | Binary mode (14 bit) | |
| Analog Scale Factor: | 18°/V | ±10V Output | |
| Accuracy: Static | ±0.5° | ||
Heading | |||
| Range: | 0° - 360° | ||
| Resolution: | 0.02° | Binary mode (14 bit) | |
| Analog Scale Factor: | 18°/V | ±10V Output | |
| † | Accuracy: Static | ±1.5° | |
Acceleration | |||
| Range: X, Y, Z | ±10g | ||
| Resolution: | 4mg | ||
| Scale Factor Accuracy: | 1% | ||
| Bias: X, Y, Z | < ±10mg | ||
| Non-Linearity: | < 1% | Full scale range | |
| Bandwidth: | 20 Hz | ||
Magnetic | |||
| Range: X, Y, Z | ±1000 mGauss | ||
| Resolution: | 0.1 mGauss | Binary mode (14 bit) | |
| Scale Factor Accuracy: | 1% | ||
| Bias: X, Y, Z | < ±5 mGauss | ||
| Non-Linearity: | < 0.01% | Full scale range | |
| Bandwidth: | 10 Hz | ||
Environmental | |||
| Temperature: Operating | -40°C to +85°C | ||
| Temperature: Storage | -55°C to +85°C | ||
| Vibration: Operating | 5g rms | 20 Hz to 2 kHz | |
| Vibration: Survival | 10g rms | 20 Hz to 2 kHz | |
| Shock: Survival | 500g | 10mS ½ sine wave | |
Electrical | |||
| Frame Rate: | 71.1 Hz | Maximum | |
| Startup Time: Data | 5 sec | ||
| Startup Time: Fully operational | 10 sec | ||
| Input Power: | 10 to 30VDC | < 3W | |
| Input Current: | 250mA @ 12VDC | 125mA @ 24VDC | |
| Digital Output: | RS-232 | ||
| Analog Output: | ±10VDC | ||
| Analog Output Impedance: | 300 Ohm | Per line | |
Physical | |||
| Axis Alignment: | < 0.25° | ||
| Size: Including Mounting Flanges | 3.24"W x 5.78"L x 2.6"H | 8.2 x 14.7 x 6.6 (cm) | |
| Weight: | 22oz (1.4lb) | 620 grams (0.6Kg) | |
| Connection: RS-232 | 9 pin female "D" subminiature | ||
| Connection: Power / Analog Outputs | 9 pin male "D" subminiature | ||
| * | Actual accuracy can be calculated as the listed percentage multiplied by the change in value over the entire dynamic maneuver. | ||
| † | Static heading accuracy is dependent on the magnetic environment. This sensor will meet or exceed this spec within the 48 contiguous United States. | ||
| • | Specifications are subject to change without notice. | ||
| • | This product may be subject to export restrictions. Please consult the factory. | ||