Research on reflective ultrasonic CT experimental device

摘要

In order to emphasize the significance of CT simulation and to help students to understand CT working principle, especially the graphic reconstruction principle, a reflection type ultrasonic CT experimental device based on the Stm32 is designed for the teaching of CT. The device consists of a transceiver ultrasonic module, a MCU module, a serial communication module, a 3D mechanical platform, a stepper motor drive module and a Matlab graphical reconstruction module. The ultrasonic signals are launched by the Stm32 MCU controlling transceiver ultrasonic module, the movements of the object under test and the rotation and translation of ultrasonic transducer are controlled by the VB interface. The signals reflected by the object under test will be collected and processed by the Stm32 MCU, and then transferred to a computer through a serial port communication. A 3-D contour graph reconstruction of the object under test is implemented by the Matlab software and is displayed in the VB interface imaging window. There are many advantages of this device, such as small volume, simple structure, widely-used components, easy maintenance and repair, and thus, broad market prospects.