Research on Measurement Method of Ultrasonic Transit Time based on Automatic Gain Control

被引：0
作者：
Ma, Qinyong [1 ,2 ]
Zhang, Yuanzheng [1 ]
机构：
[1] Chongqing Res Inst, China Coal Technol & Engn Grp, Chongqing 400039, Peoples R China
[2] State Key Lab Gas Disaster Detecting Preventing &, Chongqing 400039, Peoples R China
来源：
PROCEEDINGS OF THE 39TH CHINESE CONTROL CONFERENCE | 2020年
关键词：
Automatic gain control; Ultrasonic transit time; Adaptive threshold; Zero crossing detection; Flow calibration; SIGNAL-PROCESSING METHOD; THRESHOLD;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In order to reduce the periodic error in the transit time detection caused by the amplitude jitter, this paper adopts the automatic gain control technology to stabilize the amplitude of received ultrasonic signal, and detect the accurate ultrasonic transit time according to the adaptive threshold method and the zero crossing detection method. The flow calibration experiment is carried out on the self-designed ultrasonic gas flowmeter, the experimental results demonstrate that the measurement accuracy is within +1% and the repeatability is within 0.2%.
引用
收藏
页码：2032 / 2036
页数：5
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