The measurement principle and sensor structure of a new-style time-difference method ultrasonic flow meter are presented. Software waveform analyses arithmetic based on FPGA and a bran-new echo datum mark position criterion are put forward. Exact measurement time can be helpful for improving system precision. In the end, realization project is simply described.Show More
The measurement principle and hardware structure of a new-style time-difference method ultrasonic flowmeter are presented. Software arithmetic based on FPGA high-speed data sampling technology is put forward. Sample speed is up to 80 MHz and sample depth is 1 K byte, it can fulfill the requirement of ultrasonic flowmeter software arithmetic to sampling. The design can upgrade on-line. Thus, system...Show More
