The BJ Marine Tech. Motion Sensing System is a low cost unit which provides heading, pitch and roll data as well as heave, yaw and acceleration data. The Motion Sensing System is designed to provide instrumentation for ships and Remote Operated Vehicles, though it can be used on any type of vehicle.
The system uses industry standard sensors to read motion and heading. Additional sensors can be incorporated to read wind speed and direction, atmospheric pressure etc.
When used onboard an R.O.V. an acoustic altimeter and pressure sensor can also be incorporated to give distance off the sea bed and depth of the R.O.V.
The unit accepts eight analogue inputs (0-5 Volt), which are digitised using a BJMT Multi IO card The MIO card digitises the sensor outputs and combines the readings into a single serial data stream.
Sixteen input channels are also monitored and a number generated which represents the off/on state of the inputs. The inputs can be used to monitor leak detectors, pressure switches, proximity switches etc.
Sixteen digital output lines are provided which can be controlled, and made to switch auxiliary equipment. When used with a switcher card the unit can switch cameras, lights etc off and on.
Two serial ports are provided; one serial channel is dedicated to the compass module.
The second serial channel is used to send the multiplexed data. The data is sent in ASCII format at 38400 baud. When used in continuous mode the system updates 16 times per second. The data can be received and displayed on a terminal or PC, or transmitted via a wireless modem.
This data stream can be transmitted to a host computer, using the on board RS232, RS422, or TTL output options.
The unit can be supplied in various enclosures types to suit customer’s requirements. The blue hard anodised aluminium enclosure is most suited for harsh environments. A pressure resistant cylinder enclosure for the undersea environment or a light weight aluminium enclosure for use in more protected environments.
We have been working closely with QinetiQ to incoroporate the BJ Marine Tech Ltd motion sensing system in to their project ORPHEUS "QinetiQ's unique navigational safety system"
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