Study of Probe Distribution for Furnace Acoustic Tomographic Temperature Measurement

doi:10.12096/j.2096-4528.pgt.20050

Abstract

Abstract:

The two/three-dimensional distribution image of furnace temperature can be obtained by furnace acoustic tomographic temperature measurement system. The distribution of ultrasonic probes will directly affect its imaging accuracy. Four-side and four-corner distribution of 8, 12 and 16 ultrasonic probes were studied, respectively. Tikhonov regularization algorithm was adopted to obtain the temperature distribution under coarse mesh, and then the local weighted regression method was used to predict the temperature distribution after mesh refinement. Typical temperature field distributions reconstruction was carried out for the 6 probe distributions, and the root mean square error and correlation coefficient were analyzed. The results show that the highest accuracy can be obtained using 16 four-side distribution probes.

Key words: boiler, acoustic tomography, probe distribution, temperature field reconstruction, Tikhonov regularization

CLC Number:

TK311

Lifeng ZHANG, Yu MIAO. Study of Probe Distribution for Furnace Acoustic Tomographic Temperature Measurement[J]. Power Generation Technology, 2021, 42(3): 329-335.

Figures/Tables 10

References 19

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参数	分布方式
参数	a	b	c	d	e	f
E_mse	0.020 0	0.020 1	0.032 7	0.043 8	0.012 3	0.015 0
R_e	0.992 4	0.992 3	0.983 1	0.968 7	0.996 2	0.994 2
K_em	49.620	49.368	30.064	22.116	80.991	66.280

参数	分布方式
参数	a	b	c	d	e	f
E_mse	0.020 0	0.020 1	0.032 7	0.043 8	0.012 3	0.015 0
R_e	0.992 4	0.992 3	0.983 1	0.968 7	0.996 2	0.994 2
K_em	49.620	49.368	30.064	22.116	80.991	66.280

参数	分布方式
参数	a	b	c	d	e	f
E_mse	0.027 3	0.027 3	0.035 5	0.051 4	0.023 5	0.019 3
R_e	0.980 1	0.979 7	0.978 4	0.951 5	0.986 0	0.989 0
K_em	35.901	35.886	27.560	18.511	41.957	51.243

参数	分布方式
参数	a	b	c	d	e	f
E_mse	0.027 3	0.027 3	0.035 5	0.051 4	0.023 5	0.019 3
R_e	0.980 1	0.979 7	0.978 4	0.951 5	0.986 0	0.989 0
K_em	35.901	35.886	27.560	18.511	41.957	51.243

参数	分布方式
参数	a	b	c	d	e	f
E_mse	0.097 4	0.078 8	0.084 4	0.100 7	0.059 5	0.039 6
R_e	0.897 6	0.917 6	0.921 2	0.842 0	0.948 6	0.974 6
K_em	9.215	11.644	10.914	8.361	15.942	24.611