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온도 보상을 고려한 전달 시간차 방식 초음파 공기 유량계의 개발
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 Title & Authors
온도 보상을 고려한 전달 시간차 방식 초음파 공기 유량계의 개발
황재석; 김중일; 고상근;
 
 Abstract
In this study, a transit time type ultrasonic flow meter was developed to measure the volumetric air flow rate in a circular tube. To accomplish a high sampling rate, the ultrasonic wave was transm itted and received continuously. The calibration of transit time of the ultrasonic wave with temperature variation is not easy because of the bound effect of the ultrasonic beam at the tube wall. And so, a sound absorbing material was used at the inner surface of the flow meter to reduce ultrasonic echo. And Two sets of ultrasonic sensors were used to measure the flow rate, and the temperature compensation circuit was developed to acquire the flow rate which is not affected by the air temperature.
 Keywords
Air Flow Rate;Transit-Time-Type Ultrasonic Flowmeter;Continuous Wave Transmittance;Bound Effect;Reverse Flow;Temperature Compensation;
 Language
Korean
 Cited by
 References
1.
SAE Paper 840137, 0000.

2.
The Measurement of Air Flow, 1977.

3.
Sensors and Actuators A, 1993. pp.37-38;135-140

4.
Journal of applied meteoroloty, 0000. vol.2. pp.156-164

5.
United States Patent No. 4,488,428, 1982.

6.
6th International Conference on Flow Measurement, 1993.

7.
Fundamental Mechanics of Fluids, 1974. pp.349

8.
Fundamentals of Acoustics, 1980. pp.111-115;137

9.
대한기계학회 논문집, 1994. vol.18. 4, pp.1072-1080