Circuit Design for an Ultrasonic Range Finder

• Main Authors: Anh Tuan Nguyen, 阮俊英
• Other Authors: Wu, Jieh-Tsorng
• Format: Others
• Language: en_US
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/8u96zj

碩士 === 國立交通大學 === 電機資訊國際學程 === 107 === To date, low-cost high-performance ultrasonic range finders remain a significant role in both domestic and industrial applications. In these systems, distance measurements are based on determining the time-of-flight (TOF) of reflected echoes in a pulse-echo configuration. In this work, our first goal is to investigate circuit techniques and digital signal processing algorithms to improve the range and resolution of a proposed ultrasonic range finder. In addition, from the results of this system, we will explore a design of ultrasonic interface integrated sub-circuits toward noise reduction and compactness. An experimental circuitry being constructed to operate with 100kHz transducers is capable of detecting a distance within the range of 3m with a resolution of 0.1m (or 100mm). From these references, a combination of ultrasonic interface integrated sub-circuits was simulated. This circuit can achieve a peak Signal-to-Noise-and-Distortion Ratio (SINAD) of 80dB.