- Chinese Core Journal
- Chinese Science Citation Database (CSCD) Source journal
- Journal of Citation Report of Chinese S&T Journals (Core Edition)
| Citation: |
HUANG Cong, LI Jiyu, LAN Yubin, YE Weixin, LI Sijia, XING Hang. Design and experiment of a wind speed detection equipment with wind pressure conversion near ground[J]. Journal of South China Agricultural University, 2018, 39(1): 105-111. DOI: 10.7671/j.issn.1001-411X.2018.01.017
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The current wind speed detection equipment is influenced by wind speed interference in the wind field. To solve this problem, this paper presented a new kind of wind speed detection equipment using pitot tube speed sensors based on wind pressure signal to obtain better unmanned aerial vehicle(UAV) wind parameters near ground.
We first used axial fan to test the interference of induction position of pitot tube wind speed sensor as well as vane anemometer, and then used hot wire anemometer to detect the changes of wind speeds before and after interference. In the end, we used axial fan to test and record wind speeds of all pitot sensors at the same wind speed, and obtained the consistency of the system. The measured wind speed of the standard hot wire anemometer was compared with that of the sensor in the system at the same wind speed to find out the range of wind speed in which the accuracy of pitot tube wind speed sensor was low. Matlab software was used to fit the wind pressure signal and wind speed value.
At the wind speed of 10–15 m·s–1, the reduction of wind speed interfered by pitot tube did not exceed 1%, while reached more than 20% for the vane anemometer. The maximum absolute discrepancy of all 30 sensors of this equipment was 0.96 m·s–1when the wind speed was 15.00 m·s–1, the maximum relative discrepancy was 6.40%, and the coefficient of variation was about 1%. Fitting with three-time formula, the sum of squares for error was 0.099 6, the goodness of fit (R2) was more than 0.96.
Comparing to the current methodology, the proposed system can effectively detect the rotor wind speed data of UAV and has the significant advantage of reducing interference. This system can effectively help research the field work of UAV.
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