Strapdown Heading Reference SHR-360

Watson heading reference sensors are strap-down devices. This means installation does not require a gimbal. It is equipped with three accelometers that detect level and adjust the heading data appropriately.

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

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SKU: SHR-360 Categories: ,

Description

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.

Applications

Downloads

Download Spec Sheet (PDF - 143.7 KB)

 

Download Manual (PDF - 101.5 KB)

 

Specifications

Attitude

Range: Bank ±180°
Range: Elevation ±90°
Resolution: 0.02° Binary mode (14 bit)
Analog Scale Factor: 18°/V ±10V Bank; ±5V Elevation
Accuracy: Static ±0.5°

Magnetic 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: 0.1% Full scale range
Bandwidth: 3 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: 284.44 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 2.67″H 8.2 x 14.7 x 6.8 (cm)
Weight: 22oz (1.4 lb) 620 grams (0.6 Kg)
Connection: RS-232 9 pin female “D” subminiature
Connection: Power /
Analog Outputs
9 pin male “D” subminiature
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.

Additional information

Weight 0.6 kg
Dimensions 14.7 x 8.2 x 6.8 cm

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