FPGA-based transmission frequency adjustment system and ultrasonic equipment

Abstract

The invention provides an FPGA-based transmission frequency adjustment system and ultrasonic equipment, and the FPGA-based transmission frequency adjustment system comprises: bus decoding equipment which is used for parsing instruction information transmitted by an upper computer to obtain a preset parameter which comprises a plurality of pieces of configuration data and an excitation pulse frequency division coefficient; clock dynamic configuration equipment which is used for performing configuration according to the plurality of configuration data and outputting a dynamic clock signal; and emission pulse time sequence control equipment which is used for carrying out frequency division on the dynamic clock signal according to the excitation pulse frequency division coefficient to obtain an adjustable target excitation pulse signal. The dynamic clock signal is adjustable, the requirements of transducers with different transmitting frequencies can be met, the configurable frequency points are many, and the precision change is small.

Description

technical field [0001] The present application relates to the field of ultrasonic technology, in particular to an FPGA-based transmission frequency adjustment system and ultrasonic equipment. Background technique [0002] In an ultrasound system, different transducers have different center transmission frequencies and frequency bands, and the FPGA transmission control unit needs to realize digital excitation pulses of different frequencies according to different clinical applications. The transmission frequency of many current ultrasound imaging systems is 2-20MHz, and in order to obtain higher tissue imaging resolution of intravascular ultrasound, the imaging transducer frequency is higher, and the transmission frequency reaches an ultra-high frequency of 20-120MHz launch. [0003] The FPGA transmission control unit needs to realize variable frequency, and now the fixed main clock of the FPGA transmission control unit is often used for frequency division to obtain the tran...

AI Technical Summary

Problems solved by technology

In ultra-high frequency transmission, such as frequencies above 80MHz, if you want to change the transmission frequency step by 1MHz to 2MHz and the transmission frequency is an integer or a finite decimal, if the output transmission frequency is 88MHz and 89MHz at the same time, you can use frequency division. , it is necessary to find the least common multiple of 88 and 89, that is, 88*89=7832MHz, which requires the main clock frequency of the emission control unit to be above GHz, and the setup and hold time of the internal registers of the FPGA cannot meet the requirements, and the timing constraints cannot pass. Therefore, The related technology realizes fewer emission frequency points and lower adjustment accuracy

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