Composition, Principle and Specification
2-1
Chapter 2
Composition, Principle and Specification
2.1 Composition and Operation Principle
2.1.1 System
Composition
The system consists of a main unit, probes and peripheral devices. The main unit
includes Probe Connector Board, Order and Amplification Board, Digital Processing
Board, Control Platform, Operation Panel, Monitor and Power Supply. See Fig. 2-1.
Fig. 2-1 System Composition Block Diagram
2.1.2 Operation
Principle
The fundamental operation principle of the main unit:
The probe connector board receives transmit excitation signals from the Digital
Processing Board and generates transmit high-voltage pulse through high-voltage drive
circuit. The high-voltage pulse then is transmitted to the working elements of the probe to
generate ultrasound. The echo of the ultrasound from human body is received by the
same working elements and converted into feeble echo electrical signals, which will be
transmitted to the Order and Amplification Board through front-end amplification. There
are two-probe connectors available on the Probe Connector Board, to which two probes
Probe1
Probe
Con-
nector
Board
Digital
Processing
Board
USB Port
Video
Out
Operation
Panel
Ultrasound
Receive/Trans
mit Front-end
Image Data
Contr
ol
Main Unit
Power
Probe2
Monitor
Control
Platform
Network Port
Order
and
Amplifi-
cation
Board