3
1.3.2 Processing Capabilities
The central processing unit (CPU), located in the CEU, is based on the
industry PC/104 standard. Use of this format ensures the ability to
upgrade easily. The CPU software is written in the C language allowing
reliable software documentation and software upgrades. The CPU has
two types of memory. There is 512 KB of Flash EPROM where the
operating system is stored and 1 MB of RAM available for use during
system operation. Serial links are provided to the CPU through standard
RS-232 and RS-422 formats.
1.3.3 Video Recording Capability
Either camera image can be recorded with an on-board VCR or
down-linked through a microwave system. The video outputs are preset
for either U.S. (NTSC) or European (PAL) standards.
1.4 SeaFLIR II Imaging System
The SeaFLIR II Imaging System (Figure 1-1) consists of three primary
units. Two of the units, the Stabilized Gimbal Assembly (SGA), and the
Control Electronics Unit (CEU), are installed on the host platform. The
Hand Control Unit (HCU) is connected to the CEU and can be installed
and stored in a variety of methods.
1.4.1 Stabilized Gimbal Assembly (SGA)
CAUTION
Do not subject the SGA to operational airspeeds in excess
of 250 mph (218 knots), as this could cause damage to the
ferrofluidic seals.
The SGA is a gyro-stabilized unit containing an IR camera system with a
closed-cycle cooling system, a color CCD camera, an optional Laser
Pointer, azimuth and elevation rate sensors, preamplifiers, slip rings and
positioning torque motors, and an external hourly time meter to register
the operational time of the SGA. The SGA can rotate a continuous 360
in both azimuth and elevation, and both axes are driven with direct drive
torque motors. Since it uses no gears its operating motion works
smoothly and without backlash. This enables the internal rate gyros to
sense host platform motion and vibrations and remove these unwanted
effects without image jitter on the monitor. The IR camera allows the
Commercial in Confidence
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Retrieval Date:07-Dec-10
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