Algorithm research of intelligent filtering elimination treatment by ultrasonic ranging signal

Abstract

Currently, a threshold is set in the ultrasonic ranging for filtering. This kind of method is not suitable for long-distance ultrasonic measurement. This paper designs an algorithm for ultrasonic ranging signal filtering based on two-step correlation method. First, the range of the ultrasonic wave is corrected by the cross correlation function between the envelope of the transmitted signal and the square envelope of the echo signal. Then, the transmission function of the filter of ultrasonic ranging space is studied to short the process time of the algorithm. Finally, the the projection function is designed to complete the filter process. The experimental results show that the algorithm has great ability to filter interference, and the anti-jamming performance is obviously enhanced.

Subject Classification:

• MSC2010
• 94A99

Keywords:

• Ultrasonic ranging
• Signal
• Intelligent filtering
• Algorithm research