Description
The ISM3D is a highly accurate underwater Attitude & Heading Reference System providing Heading to ±0.5° of local Magnetic North with Pitch and Roll to ±0.07° accuracy.
The ISM3D utilises high grade MEMS based Accelerometers, Angular Rate Gyroscopes and Magnetometers all of which feed into an advanced fusion engine driven by a dual core micro-processor.
Provided in a Titanium housing, depth rated to 6,000 meters, with a length of 65mm – the ISM3D sets a new standard in size, durability and capability.
Also available in a Delrin Housing depth rated to 1,000 meters or as an OEM system.
Heading
Heading to ±0.5° of local Magnetic North.
The Heading is derived from Micro-Electrical-Mechanical-System (MEMS) based technology.
Within the ISM3D there are MEMS based Gyros, Accelerometers & Magnetometers. The outputs from each of these MEMS devices are fused together using an advanced fusion algorithm. The output from this is highly stable Heading, Pitch & Roll.
The Heading is highly resilient against temporary magnetic interferes. This is aided by a soft and hard iron calibration feature once the unit has been installed on the ROV, AUV or other underwater platform.
In areas where a large amount of steel of other magnetic disturber is present, the unit can be set to operate using the Angular Rate Gyroscopes and Accerometers, without input from the Magnetometer. The low drift rate of the advanced MEMS based Gyroscopes enables navigation to be conducted in areas where previously only a fibre or ring laser diode based heading sensor would suffice.
Pitch & Roll
Pitch & Roll to ±0.07° Accuracy.
The Pitch and Roll reading is derived from Micro-Electrical-Mechanical-System (MEMS) based technology.
Within the ISM3D there are three MEMS based Gyros, Accelerometers & Magnetometers. The outputs from each of these MEMS devices are fused together, providing highly stable Heading, Pitch & Roll.
Additional information
| Area of Application | ROV & AUV Heading & Attitude Sensor |
|---|---|
| Width [m] | 0.043 |
| Addres | Impact Subsea Unit 10 & 11, Castle Street, Castle Road Industrial Estate AB41 9RF Ellon United Kingdom |
| Brand | Impact Subsea |
| Housing material | Titanium or Acetal |
| Weight [kg] | 0.33 |
| Height [m] | 0.065 |
| Length [m] | 0.043 |
| Max. operating temperature [°C] | 50 |
| Range | 0 to 360 |
| Operating temperature: min. [°C] | -10 |
| Bias Stability Over Temp (°/sec) | 0 – Temperature Compensated |
| Bias Instability (°/hr) | 0 – Continuous auto-calibration of gyro bias |
| Range: Roll, Pitch, Yaw (°/sec) | 2500 |
| Type of sensor | MEMS |
| Resolution | 0.01 |
| Accuracy | 0.07 |
| URL |
