scholarly journals Dynamic Reconstruction Algorithm of Three-Dimensional Temperature Field Measurement by Acoustic Tomography

Sensors ◽  
2017 ◽  
Vol 17 (9) ◽  
pp. 2084 ◽  
Author(s):  
◽  
◽  
Keyword(s):  
Temperature Field ◽  
Field Measurement ◽  
Three Dimensional ◽  
Reconstruction Algorithm ◽  
Acoustic Tomography ◽  
Dynamic Reconstruction

scholarly journals A Method for Reconstruction of Boiler Combustion Temperature Field Based on Acoustic Tomography

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Yuhui Wu ◽  
Xinzhi Zhou ◽  
Li Zhao ◽  
Chenlong Dong ◽  
Hailin Wang
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Optimal Parameter ◽  
Interpolation Method ◽  
Least Square Method ◽  
Reconstruction Algorithm ◽  
Least Square ◽  
Temperature Fields ◽  
Acoustic Tomography ◽  
Measured Temperature

Acoustic tomography (AT), as a noninvasive temperature measurement method, can achieve temperature field measurement in harsh environments. In order to achieve the measurement of the temperature distribution in the furnace and improve the accuracy of AT reconstruction, a temperature field reconstruction algorithm based on the radial basis function (RBF) interpolation method optimized by the evaluation function (EF-RBFI for short) is proposed. Based on a small amount of temperature data obtained by the least square method (LSM), the RBF is used for interpolation. And, the functional relationship between the parameter of RBF and the root-mean-square (RMS) error of the reconstruction results is established in this paper, which serves as the objective function for the effect evaluation, so as to determine the optimal parameter of RBF. The detailed temperature description of the entire measured temperature field is finally established. Through the reconstruction of three different types of temperature fields provided by Dongfang Boiler Works, the results and error analysis show that the EF-RBFI algorithm can describe the temperature distribution information of the measured combustion area globally and is able to reconstruct the temperature field with high precision.

scholarly journals Three-dimensional temperature field measurement of flame using a single light field camera

2016 ◽  
Vol 24 (2) ◽  
pp. 1118 ◽  
Author(s):  
Jun Sun ◽  
Chuanlong Xu ◽  
Biao Zhang ◽  
Md. Moinul Hossain ◽  
Shimin Wang ◽  
...  
Keyword(s):  
Temperature Field ◽  
Field Measurement ◽  
Light Field ◽  
Three Dimensional

scholarly journals Real-time temperature field measurement based on acoustic tomography

2017 ◽  
Vol 28 (7) ◽  
pp. 074002 ◽  
Author(s):  
Yong Bao ◽  
Jiabin Jia ◽  
Nick Polydorides
Keyword(s):  
Temperature Field ◽  
Real Time ◽  
Field Measurement ◽  
Acoustic Tomography

Research on Reconstruction Algorithm of Temperature Field by Acoustic Measurement in Boiler

2012 ◽  
Vol 424-425 ◽  
pp. 1305-1308
Author(s):  
Hong Bo Lu ◽  
Wei Hua Sun ◽  
Zhi He Li
Keyword(s):  
Temperature Field ◽  
Three Dimensional ◽  
Reconstruction Algorithm ◽  
Acoustic Measurement ◽  
Gas Temperature ◽  
Wave Refraction ◽  
Engineering Software ◽  
Simulated Temperature ◽  
Three Dimensional Display ◽  
The Ideal

Based on the theory of acoustic measurement of gas temperature and the ideal temperature field distribution in boiler, a new algorithm for reconstructing temperature field taking into account the compensation of sound wave refraction is proposed. According to engineering software MATLAB, computer simulation of the reconstruction algorithm can be done, and the three dimensional display and the isothermal contour can be produced. Finally, the simulated temperature field is compared with the ideal one, and the error is analyzed. It is proved that the reconstruction algorithm is accurate and feasible.

scholarly journals Physical Simulation Test on Temperature Field Distribution of Artificial Vertical Straight Multirow Freezing Inclined Shaft

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Jielong Sun ◽  
Jianxi Ren
Keyword(s):  
Temperature Field ◽  
Field Distribution ◽  
Wall Temperature ◽  
Field Measurement ◽  
Physical Simulation ◽  
Three Dimensional ◽  
Test System ◽  
Simulation Test ◽  
Temperature Field Distribution ◽  
Frozen Sand

This study investigated the temperature field distribution of a freezing inclined shaft. Thus, a three-dimensional physical simulation test system was developed, and the system consists of six parts, which are simulation box and shaft model, loading system, freezing system, external environment simulation system, and data acquisition system. From the results of physical and mechanical property test of artificially frozen sand, in the range of 25°C to -20°C, the heat capacity of sand decreases first, then increases, decreases, and finally tends to be stable; the thermal conductivity of sand gradually increases and finally becomes stable; and the cohesion, internal friction angle, uniaxial compressive strength, and elastic modulus of artificially frozen sand all increase as the freezing temperature decreases. The three-dimensional physical simulation test and field measurement showed that the distance from the freezing pipe is the main factor affecting freezing wall temperature, and the closer to the freezing pipe, the faster the cooling rates. Comparison of theoretical calculation results and field measurement results shows that the calculation formula of freezing wall temperature with time of the inclined shaft can reflect the general law of freezing wall temperature cooling. Therefore, the 3D physical simulation test system is reliable and the test method is feasible.

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