Design and implementation of an ultrasound distance estimation device

• Main Author: Lim, Wei Kiong.
• Other Authors: Lim Yong Ching
• Format: Final Year Project
• Language: English
• Published: 2012
• Subjects: DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing
• Online Access: http://hdl.handle.net/10356/50057
• Institution: Nanyang Technological University

While there are plenty of Ultrasonic Range finder modules available on the market, normally expensive and most of the modules are using “parallax ping” approach which detect a distance between 50 centimeters to 8 meters. However, this project uses a different approach by placing 2 different ultrasonic modules at different location, namely Location A and Location B, to measure a particular distance. During the transmitting of signal, digital processing, such as digital filtering for noise rejection will be implemented in the digital signal processor. The problems encountered are investigated in this type of distance estimation technique which includes transducer directivity and multipath effects. In addition, the characteristic of ultrasound and ultrasonic transducers are also investigated in this project. Moreover, the device can be modified to meet the user’s exact needs, and is relatively inexpensive.