ISM3D

The ISM3D is a highly accurate underwater Attitude & Heading Reference System.

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. The unit provides Heading to ±0.5° of local Magnetic North with Pitch and Roll to ±0.05° accuracy. 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 ±0.05° 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.

Features
  • Heading: ±0.5° accuracy
  • Pitch en Roll: ±0.05° accuracy
  • Titanium Housing
  • Depth rated to 6,000 meters
  • Optional Delring Housing
  • SeaView software: Configure sensor, view & log data
  • Emulate any device: direct replacement of existing equipment
Applications
  • ROV & AUV Heading & Attitude
  • Equipment Deployment Monitoring
  • Motion Reference Unit (MRU)
  • Auto heading
  • Replacement for Flux gate compass
  • Replacement for magnetically slave gyro
Heading
  • Accuracy: ± 0.5°
  • Resolution: 0.01°
Communications & Power
  • Digital: RS232 & RS485
  • Protocol: 300 to 115,200 baud
  • Data: Continuous or on demand
  • Data Rate: Up to 250Hz
  • Input Voltage: 7 to 32V DC
  • Power: 29mA @ 24V DC
Attitude
  • Pitch: ± 90°
  • Roll: ± 180°
  • Accuracy: ± 0.05°
  • Resolution: 0.01°
Physical
  • Weight (Air / Fresh Water):  0.33/0.225kg (Titanium) 0.20/0.10kg (Delrin®)
  • Depth Rating:  6,000m (Titanium) 1,000m (Delrin®)
  • Temperature:  -10 to 50° operating -20 to 70° storage
  • Connector: Subconn MCBH8M-SS other options available