Abstract
The fan-beam optical sensor is made up of many semiconductor lasers and detectors fixed around the wall alternately at a cross section of pneumatically conveying pipe. When the sensor works, a scanning light source emits a 50° lamellar fan-beam through the gas-solid two phase flow, and the projection data resulting extinction effect of solid particles are detected at the same time. With the projection data, the flow rate mass can be calculated, and then the flow image can be reconstructed. In this paper, the design of the sensor including spatial arrangement of the structural parts, basic principle and measurement sensitivity distribution are introduced. The mathematical measurement model of solid mass flow rate is presented together with the testing results.
Similar content being viewed by others
References
Ibrahim, S., Green, R.G., 2002. Optical Fibre Sensors for Imaging Concentration Profile. IEEE Int. Conference on Semiconductor Electronics, Penang, Malaysia, p. 121–125.
Li, Y., Wang, R.H., Zheng, Y.N., 2003. Image Reconstruction of 2D Concentration Distribution of Particles Flow with Extinction Optical Tomography. Fifth International Symposium on Instrumentation and Control, SPIE,5253:407–413.
Li, Y., Wang, R.H., Zheng, Y.N., 2004a. Calculation and analysis of sensitivity distribution to array optical tomographic sensor.Chinese Journal of Scientific Instrument,25(4):494–497 (in Chinese).
Li, Y., Zheng, Y.N., Wang, R.H., 2004b. Theoretic model and experiment research of optoelectronic granular solid flowmeter.Chinese Journal of Mechanical Engineering,40(8):160–165 (in Chinese).
McMackin, L., Hugo, R.J., Bishop, K.P., Chen, E.Y., Pierson, R.E., Truman, C.R., 1999. High speed optical tomography system for quantitative measurement and visualization of dynamic features in a round jet.Experiments in Fluids,26:249–256.
Modica, A., Stepakoff, G., Rosenbaum, H., 1970. A Shock Study of Plasma Alleviation by Oxide Dust. NASA SP 232, p.531.
Teng, Y., Li, Y.G., Zhou, W.G., 2002. Present and prospective techniques for gas-solid two-phase flow measurement.Journal of Shanghai University of Electric Power,18(4):39–43 (in Chinese).
Yan, Y., Byrne, B., Coulthard, J., 1995. Sensing field homogeneity in mass flow rate measurement of pneumatically conveyed solids.Flow Measurement Instrument,6(2): 115–119.
Author information
Authors and Affiliations
Corresponding author
Additional information
Project (No. 04009469) supported by the Natural Science Foundation of Guangdong, China
Rights and permissions
About this article
Cite this article
Yang, L., Ying-na, Z. & Hong-wei, Y. Design of fan beam optical sensor and its application in mass flow rate measurement of pneumatically conveyed solids. J. Zhejiang Univ. Sci. A 6, 1430–1434 (2005). https://doi.org/10.1631/jzus.2005.A1430
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1631/jzus.2005.A1430