[1] Tang Huiqiang, Huang Weiyi, Li Ping, Lü Qinghua, et al. Ultrasonic wind velocity measurement based on DSP [J]. Journal of Southeast University (English Edition), 2005, 21 (1): 20-23. [doi:10.3969/j.issn.1003-7985.2005.01.005]

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Ultrasonic wind velocity measurement based on DSP()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

21

Issue:

2005 1

Page:

20-23

Research Field:

Automation

Publishing date:

2005-03-30

Info

Title:

Ultrasonic wind velocity measurement based on DSP

Author(s):

Tang Huiqiang¹;  Huang Weiyi²;  Li Ping¹;  Lü Qinghua¹

¹ Department of Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
² Department of Instrument Science and Technology, Southeast University, Nanjing 210096, China

Keywords:

ultrasonics;  IIR(infinitive impulse response)filter;  DSP(digital signal processing);  wind velocity

PACS:

TP274+.5

DOI:

10.3969/j.issn.1003-7985.2005.01.005

Abstract:

Ultrasonic transmitting, receiving and amplifying circuits are designed.The received signals are sampled with the high speed ADC(analog-to-digital converter), and dealt with the DSP(digital signal processing).A forward-backward IIR(infinitive impulse response)filter with no delay is designed to filter the sampled data, and series A and B are achieved by narrow and wide band filtering, respectively.In series A, the start point of the cycle first exceeding the threshold is calculated accurately by interpolation, and the start cycle is detected by fitting cycles in series A and its inversion A′ to cycles in B with variance analysis.Therefore, the start point of the start cycle is calculated precisely.By deriving the relationships between the travel time in the opposite directions of three axes and the airflow velocities, the wind velocity and direction are calculated.Experiments show that the reliability and the precision are improved, and the circuits are simplified.

References:

[1] Wang Yinguan.The precision measurement theory of ultrasonic wave speed and its application[J].Chinese Sound Technology, 1989, 8(2):18-23.(in Chinese)
[2] Sabatini A M.A digital signal-processing technique for compensating ultrasonic sensors[J].IEEE Transactions on Instrument and Measurement, 1995, 44(4):869-874.
[3] Parilla M, Anaya J J, Fritsch C.Digital signal processing for high accuracy ultrasonic range measurements[J].IEEE Transactions on Instrument and Measurement, 1991, 40(4):759-763.
[4] Zhang Yu, Wang Yuanyuan, Liu Bin.Development of a Doppler ultrasonic spectrum analysis system based on a personal computer[J].Chinese Journal of Scientific Instrument, 2001, 22(4):365-368.(in Chinese)
[5] Zhu Shiming, Liu Zhengqing, Wei Moai.The zero crossing digital average measurement method to increase measurement accuracy [J].Chinese Sound Technology, 1990, 9(3):36-39.(in Chinese)
[6] Gustafsson F. Determining the initial states in forward-backward filtering [J].IEEE Transactions on Signal Processing, 1996, 44(4):988-992.

Memo

Memo:

Biography: Tang Huiqiang(1965—), male, doctor, associate professor, thq@jlonline.com.

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