| 摘要 |
The invention relates to electronics and can be used in development of ultrasonic medical introscope or magnet imaging systems, ultrasonic devices for non-destructive control and in scanning important objects. An apparatus for the beam control of an ultrasonic phase array (USPA) comprises a control unit and a delay unit. The delay unit is performed as a reversible shift register. In addition, a clock generator, AND circuit, a T circuit and a register for changing operation direction of the reversible shift register, a toggle flip-flop for AND circuit blocking are incorporated. Output of the last bit of the reversible shift register is connected to S input of the register for changing operation direction of the reversible shift register, output of which is connected to C input of the toggle flip-flop for AND circuit blocking and to M input of changing operation direction of the reversible shift register. R input of the register for changing operation direction of the reversible shift register is connected to output of first bit of the reversible shift register. R input of the trigger for changing operation direction of the reversible shift register is connected to output of reversible shift register first bit. Output of the toggle flip-flop for AND circuit blocking is connected to input of AND circuit and to input of the control unit, output of which is connected to R input of toggle flip-flop for AND circuit blocking. Output of the clock generator is connected to second input of AND circuit, output of which is connected to C input of the reversible shift register, control inputs of the clock generator are connected to the control unit. The apparatus provides simplification of beam control and control of the whole system, and also provides speed up. |
