Design And Research Of ARM-based Digital B-type Ultrosonic Scanner

With the development of Ultrasonic theory and technology, Ultrasonic devices are updating unceasingly. Ultrasonic Diagnoses has been an important means of forecast, estimate and cure diseases. The ultrasonography diagnosis technology is safe, convenient, hurtless, and inexpensive; and its superiority also consists in selecting multiplicity diagnosis parameter and realizing flexibility in the project.The new generation digital B-ultrasonography equipment based on embedded ARM9&FPGA hardware platform and embedded LINUX operating system. The equipment has the basic function of existing black and white B-ultrasonography equipment; can carry on nimble ultrasonic data processing, thus causes the operation to be more convenient and further enhances the imaging quality. All of these build the foundation of long-distance medical service, so it will develop rapidly in the future market. The digital B-ultrasonography equipment's basic technical characteristic is realizing the extremely huge ultrasonic data real-time processing with the digital hardware electric circuit and its realization relies heavily on the FPGA technology. Now FPGA has already been used in many kinds of digital signal processing (DSP) application solutions. The hardware and software designer can use the programmable logic to develop each kind of DSP application solution. The programmable solution can adapt the fast changing standard, agreement and performance demand well.Firstly, the thesis expatiates the researching status of the medical instrument and the embedded system, thereby gives out the researching content and target. And then, the thesis obtains from the ultrasonography diagnosis principle and the design of digital B-ultrasonography equipment deeply analyses the hardware system structure. After the description of the main frame and the ARM module design, the thesis simply introduces the supersonic signal to carry on digitized processing each submodule, the programmable logical component's unique feature, the programming principle, the design cycle as well as the ARM processing module and the FPGA module main communication connection. Afterwards, the present paper introduced embedded operating system's transplant and the equipment actuates the development based on ARM9 hardware platform's Linux, described the detailed design which in detail the B supersonic diagnostic equipment's software environment's construction and the equipment actuate. The last of the thesis, the conclusion and prospect of the whole system are given.