원문정보
초록
영어
This paper proposes a new method for measuring the wind speed in the pipe, which overcomes the shortcomings of the traditional mechanical instrument with lower accuracy and ultrasonic measurement method with the high cost, it has the advantages of low cost and high precision. This paper introduces the principle of pendulum method to measure wind speed, the wind speed in the pipe is calculated by the space angle based on the spatial geometric relationship. On the other hand, the space angle is obtained by horizontal angle and vertical angle, which are gathered by the cameras placed in the ends of the bracket. Image processing technology is an important part of this method, including the image gray processing, binarization processing, edge detection and Hough transform steps, at last, the experimental results proved the feasibility of this method.
목차
1. Introduction
2. Measuring Principles
2.1. Measurement Principle of Wind Speed
2.2. Measurement Principle of Space Angle θ
2.3. Measurement Principle of Flow
3. System Hardware Design
4. Image Processing Techniques
4.1. Grey Level Transformation
4.2. Binaryzation
4.3. Edge Detection
4.4. Hough Transform
4. Experiment and Analysis
4.1. Experimental Setup
4.2. Measure the Flow Field Distribution along the Center Line of the Tube
4.3. Measure the Flow Field Distribution along The Cross Section Of The Tube
5. Conclusion
Acknowledgments
References