Computer peripherals are also constantly updated, and the computer and the computer internal and external devices responsible for communication connections, information exchange is a variety of computer interfaces, animal B ultrasound system is also using these technologies. To this end, various computer manufacturers have designed and launched a wide variety of interfaces and interface specifications, such as PS/2 interface, PCI interface, ISA interface and serial parallel interface. However, while solving the initial communication between the computer and internal and external devices, these interfaces also have various defects, such as: using non-shared interfaces, large interfaces, different specifications, and so on. In order to solve the various defects of the above interface, computer manufacturers and users urgently need a new type of peripheral connection, in this context, USB came into being, and the USB on the animal B-ultrasound is also produced.

USB interface technology in B-ultrasound system provides a new connection mode for computer and peripheral equipment, and also liberates the computer interface from the shackles of traditional I/O mode. The USB interface technology in the veterinary B-ultrasound system has the advantages that the traditional interface technology does not have:

(1) Low cost. The USB standard in veterinary B-ultrasound systems can connect peripherals and computers together at a very low cost. To facilitate the manufacture of computer USB peripherals, all USB-related intelligent mechanisms exist in the chipset of the computer host.

(2) Hot swap. The USB in the B ultrasound system of animal realizes the real plug and play function. After the device is connected, the USB will automatically detect and automatically configure the software, and can be used immediately after completion, without requiring the user to perform other operations to configure the I/O address and interrupt requests. When peripheral devices are plugged and unplugged on the USB interface of the computer, the host can scan and identify these USB peripheral devices, and load and load the corresponding device drivers

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