TY - JOUR
T1 - Development of Flue Gas Audio-Range Velocimeter Using Quadratic-Convex Frequency Sweeping
AU - Liu, Qi
AU - Zhou, Bin
AU - Zhang, Jianyong
AU - Cheng, Ruixue
PY - 2021/1/28
Y1 - 2021/1/28
N2 - Accurate measurement of flue gas velocity is crucial for safe production, energy saving and emission reduction in power plants. In this paper, a real-time flue gas audio-range velocimeter was developed using a novel sonic driving mode, quadratic-convex frequency sweeping. Both numerical analysis and in situ experiments were conducted which had validated the developed velocimeter. The accuracy and robustness of the developed velocimeter was quantitatively assessed by root mean square error (RMSE) and standard deviation (SD) from the tests data. The test data was intentionally contaminated with varied levels of noises, forming sets of measurement data with varied signal-to-noise ratios (SNRs). The simulation results show that within the variation of SNR from 0 dB to -18 dB, the averaged relative RMSE obtained using this proposed quadratic-convex driving mode is 1.2 dB and 2.3 dB lower than those obtained using linear and quadratic-concave driving modes, respectively. The experiment results indicate that the RMSE and SD values based on the quadratic-convex driving mode are less than 0.1 for each given SNR. Compared with the traditionally adopted method of linear frequency sweeping, the proposed sonic driving scheme can significantly improve the accuracy and robustness of flue gas velocity measurement. © 2001-2012 IEEE.
AB - Accurate measurement of flue gas velocity is crucial for safe production, energy saving and emission reduction in power plants. In this paper, a real-time flue gas audio-range velocimeter was developed using a novel sonic driving mode, quadratic-convex frequency sweeping. Both numerical analysis and in situ experiments were conducted which had validated the developed velocimeter. The accuracy and robustness of the developed velocimeter was quantitatively assessed by root mean square error (RMSE) and standard deviation (SD) from the tests data. The test data was intentionally contaminated with varied levels of noises, forming sets of measurement data with varied signal-to-noise ratios (SNRs). The simulation results show that within the variation of SNR from 0 dB to -18 dB, the averaged relative RMSE obtained using this proposed quadratic-convex driving mode is 1.2 dB and 2.3 dB lower than those obtained using linear and quadratic-concave driving modes, respectively. The experiment results indicate that the RMSE and SD values based on the quadratic-convex driving mode are less than 0.1 for each given SNR. Compared with the traditionally adopted method of linear frequency sweeping, the proposed sonic driving scheme can significantly improve the accuracy and robustness of flue gas velocity measurement. © 2001-2012 IEEE.
U2 - 10.1109/JSEN.2021.3055343
DO - 10.1109/JSEN.2021.3055343
M3 - Article
SN - 1530-437X
VL - 21
SP - 9777
EP - 9787
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 8
ER -