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Impact Subsea ISM3D

Underwater AHRS Providing Heading, Pitch & Roll

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 A…

  • Impact Subsea ISM3D
Impact Subsea
Unit 10, Castle Street, Castle Road Industrial Estate
AB41 9RF Ellon
United Kingdom

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.

Specifications

  • Area of Application
    ROV & AUV Heading & Attitude Sensor
  • Range
    0 to 360 degrees
  • Accuracy
    0.5
  • Resolution
    0.01
  • Type of sensor
    MEMS
  • Range
    0 to 360
  • Accuracy
    0.07
  • Resolution
    0.01
  • Type of sensor
    MEMS
  • Range: Roll, Pitch, Yaw (°/sec)
    2500
  • Operating temperature: min. [°C]
    -10
  • Max. operating temperature [°C]
    50
  • Width [m]
    0.043
  • Length [m]
    0.043
  • Height [m]
    0.065
  • Weight [kg]
    0.33
  • Housing material
    Titanium or Delrin

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