4.2.3
Generator board (A2) and Tubehead
The Generator board and the tubehead are located on the rotating arm. The power
supply voltage is directly provided by the mains line.
Generator board includes a µprocessor which communicates with the MCU board
(A1) through the CANBus cable (X15-X32). This cable also has a dedicated wire to
bring the X-ray button signal to this board, so the "dead man switch" method is
generated directly on the board.
The high frequency (HF) circuit is based on an inverter circuit working at the
frequency about 100kHz, which drives the tubehead through an output stage based
on IGBT components.
The Generator board receives the signals concerning the X-ray dose to provide (kV
and mA), from the MCU board through CANBus messages; it is the Generator
µprocessor that generates the commands used for the X-ray emission. The
Generator board provides to the tubehead the voltages that drive the high voltage
transformers that then drive anode and filament of the X-ray tube, also giving the
relevant timing.
The tubehead is composed by the X-ray tube (CEI OPX 105-12) inserted in a sealed
container, together with the high voltage transformers, filled with dielectric oil.
The Generator board controls the X-ray emission parameters feedbacks, generated
by the tubehead. Any anomalies are then communicated to the MCU board (A1)
which generates error codes to alert the operator.
4.2.4
3D Sensor Power board (A10)
It is located behind the 3D sensor support.
The main tasks are:
•
Give the power supply (9V) to the 3D Sensor.
•
Give to the MCU the temperature of the 3D Sensor, through which the system
can manage the switching ON / OFF of fans and the 3D sensor power supply.
•
Allows the transmission of the 3D exams clock signal from the Generator board
(A2) through the MCU to the 3D Sensor.
4.2.5
CCU Ceph Control Board (A11)
Its main tasks are:
•
Monitoring the functioning of these motors through the analysis of the signals
(zero position) coming from the zero position light sensors.
•
Managing the potentiometer on the nasion
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