GE H5018SC, Техническая публикация

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General theory of operation
Invenia ABUS 2.0 – System Setup and Basic Service Manual 5-15
4700-0043-00 Rev. 4
Mechanical design
The mechanical design of the Weight Tower is described
throughout the following sections.
Major components and their functions and operation
The main components in the Weight Tower are:
Tower operation before and during a scan
In setting up for the scan, the operator first sets up Scan Arm
height, then adjusts Scan Head compression:
• The Tower supports height adjustment by enabling the
operator to slide the Scan Arm up or down (and some
rotation is enabled)
• The Tower balances the weight of the Scan Head Assembly
and Transducer to make it easier for the operator to handle
them
• The height adjustment mechanism supports performing
compression at the selected height
• The Tower supports compression through its ability to have
the operator command more or less pressure, by pressing
the adjustment buttons on the right handle
• The Tower mechanism supports the goal of controlling the
compression applied to the patient during an ultrasound
examination, with the goal of keeping it nearly constant
during a scan
The following steps outline the sequence for scan setup and
pressure control.
Table 5-3: Weight Tower main components
Component Purpose
Turret Supports the Scan Arm lower tubing and
allows the Scan Arm to be raised or lowered
and to be rotated freely
Upper Weight Assembly Part of the counterbalancing mechanism for
the Scan Arm.
Lower Weight Assembly Contains the lower weight cylinder, stepped
motor with lead screw to the Upper Weight,
the motor and solenoid control board, the hex
latch components, and the hex latch solenoid
Various pulleys and
associated cables These form an analog of a fulcrum lever that
can be balanced by electro-mechanically
shifting a weight