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Three-Dimensional Temperature Field Reconstruction Technology Based on Acoustic

Author: LiKun
Tutor: YanHua
School: Shenyang University of Technology
Course: Detection Technology and Automation
Keywords: Used Acoustic thermometry Temperature Field Detection Direct three-dimensional temperature field reconstruction algorithm
CLC: TP274
Type: Master's thesis
Year: 2012
Downloads: 18
Quote: 0
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Abstract


Temperature field detection technology has been widely applied to various fields of everyday life , such as industrial boiler temperature field monitoring , atmospheric monitoring the temperature distribution and the distribution of deep-sea hydrothermal temperature monitoring , indoor temperature distribution monitoring . The temperature field detection method can be divided into contact and non-contact ; -contact temperature measurement method because of this characteristic is in direct contact with the measured medium restricting its application in corrosion and high-temperature environment . The acoustic method thermometry technology as a new type of non-contact temperature measurement technology , has a wide temperature range (0-1900 ℃), wide measurement area ( up to tens of meters ) , high- precision , real-time measurement , convenient maintenance , etc. . This article briefly describes the basic principles of temperature measurement of the acoustic method , proposed a new direct three-dimensional temperature field reconstruction algorithm . With different temperature field reconstruction algorithm --- the least squares method , referred to the new algorithm does not require a zoning pixel count is less than the number of sonic flight path , so the complex temperature field reconstruction algorithm significantly better than the method of least squares . Five typical three-dimensional temperature field model : the unimodal symmetric three-dimensional temperature field , a single peak bias the three - dimensional temperature field of the bimodal symmetric three-dimensional temperature field , four peaks symmetric three-dimensional temperature field and the three-dimensional uniform temperature field , the proposed algorithm simulation , given the reconstruction and error analysis . The simulation results show that the algorithm has high reconstruction accuracy and strong anti-interference ability . In addition , the article also study summarizes the number and location of the transceiver , effective path selection , of pixels divided the number and shape of algorithm parameters and filter parameters set on the reconstruction accuracy . In this paper, 20 acoustic transceiver temperature field reconstruction experimental laboratory 1m × 1m × 1m three-dimensional space . Read acoustic time-of-flight measurement system indoor 3D uniform temperature field in the sonic flight time , the use of three-dimensional temperature field reconstruction algorithm mentioned , room temperature, re - distribution of the three-dimensional temperature field and demonstrate analysis reconstruction results given in the error analysis . Experimental results show that the new algorithm has certain noise immunity, can be more accurate reconstruction of the room temperature under the conditions of three-dimensional uniform temperature field .

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