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Design of an ultrasonic sensor for measuring distance and detecting obstacles.
Ultrasonics. 2010 Mar; 50(3):340-6.U

Abstract

This paper introduces a novel method for designing the transducer of a highly directional ultrasonic range sensor for detecting obstacles in mobile robot applications. The transducer consists of wave generation, amplification, and radiation sections, and a countermass. The operating principle of this design is based on the parametric array method where the frequency difference between two ultrasonic waves is used to generate a highly directional low-frequency wave with a small aperture. The aim of this study was to design an optimal transducer to generate the two simultaneous longitudinal modes efficiently. We first derived an appropriate mathematical model by combining the continuum model of a bar and countermass with the compatibility condition between a piezoelectric actuator and a linear horn. Then we determined the optimal length of the aluminum horn and the piezoelectric actuator using a finite element method. The proposed sensor exhibited a half-power bandwidth of less than+/-1.3 degrees at 44.8 kHz, a much higher directivity than existing conventional ultrasonic range sensors.

Authors+Show Affiliations

Department of Mechanical Engineering, Changwon National University, 9 Sarim-dong Changwon, Gyeongnam 641-773, Republic of Korea. chong@changwon.ac.krNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19919873

Citation

Park, Jongkyu, et al. "Design of an Ultrasonic Sensor for Measuring Distance and Detecting Obstacles." Ultrasonics, vol. 50, no. 3, 2010, pp. 340-6.
Park J, Je Y, Lee H, et al. Design of an ultrasonic sensor for measuring distance and detecting obstacles. Ultrasonics. 2010;50(3):340-6.
Park, J., Je, Y., Lee, H., & Moon, W. (2010). Design of an ultrasonic sensor for measuring distance and detecting obstacles. Ultrasonics, 50(3), 340-6. https://doi.org/10.1016/j.ultras.2009.10.013
Park J, et al. Design of an Ultrasonic Sensor for Measuring Distance and Detecting Obstacles. Ultrasonics. 2010;50(3):340-6. PubMed PMID: 19919873.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Design of an ultrasonic sensor for measuring distance and detecting obstacles. AU - Park,Jongkyu, AU - Je,Yub, AU - Lee,Haksue, AU - Moon,Wonkyu, Y1 - 2009/10/22/ PY - 2009/05/06/received PY - 2009/09/06/revised PY - 2009/10/17/accepted PY - 2009/11/19/entrez PY - 2009/11/19/pubmed PY - 2010/2/25/medline SP - 340 EP - 6 JF - Ultrasonics JO - Ultrasonics VL - 50 IS - 3 N2 - This paper introduces a novel method for designing the transducer of a highly directional ultrasonic range sensor for detecting obstacles in mobile robot applications. The transducer consists of wave generation, amplification, and radiation sections, and a countermass. The operating principle of this design is based on the parametric array method where the frequency difference between two ultrasonic waves is used to generate a highly directional low-frequency wave with a small aperture. The aim of this study was to design an optimal transducer to generate the two simultaneous longitudinal modes efficiently. We first derived an appropriate mathematical model by combining the continuum model of a bar and countermass with the compatibility condition between a piezoelectric actuator and a linear horn. Then we determined the optimal length of the aluminum horn and the piezoelectric actuator using a finite element method. The proposed sensor exhibited a half-power bandwidth of less than+/-1.3 degrees at 44.8 kHz, a much higher directivity than existing conventional ultrasonic range sensors. SN - 1874-9968 UR - https://www.unboundmedicine.com/medline/citation/19919873/Design_of_an_ultrasonic_sensor_for_measuring_distance_and_detecting_obstacles_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0041-624X(09)00150-4 DB - PRIME DP - Unbound Medicine ER -