基于FPGA和DSP的气体超声流量计驱动和数字信号处理系统

doi:10.3969/j.issn.1000-1158.2017.02.17

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Abstract The driving and digital signal processing system of ultrasonic gas flow-meter based on the FPGA & DSP dual core structure was developed.It is realized by taking advantage of the high operating frequency and abundant resource inside FPGA to control the high-speed ADC & DAC and storage the data. On the other hand, the implementation of real time digital signal processing relies on the use of high-speed computing capacity of DSP. To address the ultrasonic echo signals generated by the use of sinusoidal excitation, a new method called variable threshold tracking the peak of the echo signal is proposed, based on the experimental data statistics. It aims at extracting the characteristic waves and weakens the influence of noise. The effectiveness of the system and method was verified by the results of gas calibration experiments.

Key words： metrology ultrasonic gas flow-meter variable threshold FPGA & DSP dual core structure virtual flow verification

Received: 02 April 2015 Published: 28 February 2017

PACS:

TB937

Corresponding Authors: Ke-Jun Xu E-mail: dsplab@hfut.edu.cn

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	FANG Min
	XU Ke-jun
	WANG Wei
	ZHU Wen-jiao
	SHEN Zi-wen

Cite this article:

FANG Min,XU Ke-jun,WANG Wei, et al. A Driving and Digital Signal Processing System of Gas Ultrasonic Flow-meter based on FPGA & DSP[J]. Acta Metrologica Sinica, 2017, 38(2): 200-204.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2017.02.17 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2017/V38/I2/200

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