The functions realized by the transmitting part of the veterinary B-ultrasound system mainly include transmitting focusing, transmitting apodization and adjustable transmitting power. Transmitting focusing is to change the focal position by controlling the delay time of each array element of the veterinary B-ultrasound system to transmit ultrasound. The focal position can change with the change of delay time, so as to achieve dynamic focusing; transmitting apodization is to improve the main lobe resolution and suppress the side lobe by changing the gain of each channel, so as to improve the signal-to-noise ratio of the system, improve the quality of veterinary B-ultrasound images, and improve the resolution; adjustable transmitting power means that the output power can be adjusted dynamically.

The transmitting part of the veterinary B-ultrasound system transmits focusing. The transmitting focusing technology is one of the core technologies used in the transmitting part. By controlling the time interval of each array element transmitting ultrasound to dynamically change the focus position, the moving position of the focus on the beam can be controlled to obtain cross-sectional veterinary B-ultrasound images of different depths and positions. The dynamic focusing of the transmitting part of the veterinary B-ultrasound system adopts a non-uniform sampling method, that is, by controlling the start time and sampling interval of the analog-to-digital converter to achieve digital delay, so as to achieve dynamic focusing. The principle of dynamic apodization is actually to perform weighted summation on the data of each channel. The weighting coefficients of the array elements on both sides of the veterinary B-ultrasound system are small, and the weighting coefficients of the middle array elements are large, so as to achieve the effect of enhancing the main lobe and suppressing the side lobe. The transmitting power of the veterinary B-ultrasound system is adjustable, and the output power is adjusted by controlling the adjustable high-voltage power supply. The specific implementation method is to control the output voltage by controlling the D/A input range.