吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (1): 262-267.doi: 10.13229/j.cnki.jdxbgxb201701038

• Orginal Article • Previous Articles     Next Articles

Parameter optimization of enhanced ultrasonic circumferential scanning node in WSN

ZHU Hai-yang, ZHANG He, MA Shao-jie   

  1. Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing 210094,China
  • Received:2015-09-17 Online:2017-01-20 Published:2017-01-20

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Abstract: Directional Sensor Network (DSN) node with stability of omnidirectional perception plays a decisive role in network coverage. Using the optimization method of SNOPT, the dimensions and shape of enhanced ultrasonic transducer were optimized first. With optimized horn the directivity was promoted obviously and the radiated sound pressure in the central axis was 3.5 times bigger than that of normal transducer. Then a new rotational circumferential scanning program of single-beam was designed based on the enhanced ultrasonic transducer. The model of the highest scanning speed for ultrasonic ranging was built, and the highest scanning speed of 253 r/min was achieved for monitoring the target in 6 m away. In order to get stabilized prospecting effect, the matching relationship between scanning speed and pulse frequency was established for constant number of ultrasonic beams in one scanning period. At last, target acquisition rate was analyzed. Calculation results demonstrate that the highest speed of the ultrasonic circumferential scanning system is 215 r/min in the case of good compatibility, which can acquire the target with a speed lower than 65.5 km/h.

Key words: computer application, wireless sensor network(WSN), enhanced ultrasonic, rotational scanning, target acquisition

CLC Number: 

  • TP212
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