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Modeling and Simulation of Non-crosstalk Ultrasonic Ranging Systems

Author: HaoQiang
Tutor: MengQingHao
School: Tianjin University
Course: Detection Technology and Automation
Keywords: Mobile Robots Ultrasonic transducer Crosstalk Related Coding Modulation
CLC: TP274.53
Type: Master's thesis
Year: 2007
Downloads: 101
Quote: 1
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Abstract


Away from the field . For more environmental information , usually composed of a plurality of ultrasonic transducer sensor ring . Sensor ring between adjacent transducer generates ultrasonic crosstalk phenomenon , resulting in erroneous distance measurement. Commonly used to eliminate crosstalk ultrasound method is divided into two categories: software processing method based on heuristic and hardware-based encoding method . In order to eliminate crosstalk ultrasound , this paper studied the existing literature and experimental analysis, based on the following work : 1. Summarizes the status of research in this field , ultrasonic crosstalk on the basis of analyzing the problem , find a solution to the problem entry point. (2) DC-DC excitation using an ultrasonic transducer . Compared with the original transformer excitation mode , effectively reduces the system oscillations . 3 using the ARMA model to establish a mathematical model of ultrasonic ranging system , in this model the system on the basis of circuit characteristics were studied , and the different ways to do a comparative study of incentives . 4 ARMA system model based on the pulse width modulation, frequency modulation and phase modulation methods such as simulation, analysis of the transmission characteristics of three modulation methods , and compared their respective relevant results. 5 through the simulation of different length sequence analysis of the sequence length and sequence given correlation between ; For short serial correlation easily identified problems related to the introduction of short sequence raster concepts.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system > Automatic detection system using a variety of new technologies > Ultrasonic testing equipment
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