Figure 44: Encoder Assembly
Encoder Assembly
Description
The Encoder Assembly, illustrated below, provides the measurement of the
penetration distance and speed. It mounts on the back of the thruster unit,
and consists of a sealed pressure vessel containing a high accuracy optical
encoder, and a sprocket assembly. The sprocket is driven by the gear
mounted on the drum, which subsequently turns the rotary encoder. The
sprocket is connected to the encoder via a magnetic coupling acting through a
solid face in the pressure vessel.
The Encoder Assembly contains a quadrature encoder module and PCB which
measures movement in both directions and communicates to the Neptune
Controller PCB using RS232 communications.
The penetration value is
continuously monitored in order
to provide closed loop speed
control of the motor. The
penetration value is also
recorded with the cone signals
to provide penetration data.
The encoder is connected to the
electronics pod via a Y spliced
cable, which also connects the
cone up sensor to the Neptune
Controller PCB.
The penetration value is
continuously monitored in order to provide closed loop speed control of the
motor. The penetration value is also recorded with the cone signals to provide
penetration data. The encoder is connected to the electronics pod via a Y
spliced cable, which also connects the cone up sensor to the Neptune
Controller PCB.
The penetration value is continuously monitored in order to provide closed
loop speed control of the motor. The penetration value is also recorded with
the cone signals to provide penetration data. The encoder is connected to the
electronics pod via a Y spliced cable, which also connects the cone up sensor
to the Neptune Controller PCB.
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