Ultrasonic Flow Measurement with High Resolution

Metrology and Measurement Systems

Marek Zieliński¹  Sławomir Grzelak¹  Jarosław Czoków¹  Marcin Kowalski¹ 

关键词: ultrasonic flowmeter;    time to digital converter;    programmable logic device;    time measurement;   

DOI  :  10.2478/mms-2014-0026

来源: Versita

【 摘 要 】

The ultrasonic flowmeter which is described in this paper, measures the transit of time of an ultrasonic pulse. This device consists of two ultrasonic transducers and a high resolution time interval measurement module. An ultrasonic transducer emits a characteristic wave packet (transmit mode). When the transducer is in receive mode, a characteristic wave packet is formed and it is connected to the time interval measurement module inputs. The time interval measurement module allows registration of transit time differences of a few pulses in the packet. In practice, during a single measuring cycle a few time-stamps are registered. Moreover, the measurement process is also synchronous and, by applying the statistics, the time interval measurement uncertainty improves even in a single measurement. In this article, besides a detailed discussion on the principle of operation of the ultrasonic flowmeter implemented in the FPGA structure, also the test results are presented and discussed

【 授权许可】

Unknown