Intelligent data processing of an ultrasonic sensor system for pattern recognition improvements

Seung You Na; Min-Sang Park; Won-Gul Hwang; Chang-Doo Kee

doi:10.1117/12.349756

31 May 1999 Intelligent data processing of an ultrasonic sensor system for pattern recognition improvements

Seung You Na, Min-Sang Park, Won-Gul Hwang, Chang-Doo Kee

Proceedings Volume 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials; (1999) https://doi.org/10.1117/12.349756
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

Though conventional time-of-flight ultrasonic sensor systems are popular due to the advantages of low cost and simplicity, the usage of the sensors is rather narrowly restricted within object detection and distance readings. There is a strong need to enlarge the amount of environmental information for mobile applications to provide intelligent autonomy. Wide sectors of such neighboring object recognition problems can be satisfactorily handled with coarse vision data such as sonar maps instead of accurate laser or optic measurements. For the usage of object pattern recognition, ultrasonic senors have inherent shortcomings of poor directionality and specularity which result in low spatial resolution and indistinctiveness of object patterns. To resolve these problems an array of increased number of sensor elements has been used for large objects. In this paper we propose a method of sensor array system with improved recognition capability using electronic circuits accompanying the sensor array and neuro-fuzzy processing of data fusion. The circuit changes transmitter output voltages of array elements in several steps. Relying upon the known sensor characteristics, a set of different return signals from neighboring senors is manipulated to provide an enhanced pattern recognition in the aspects of inclination angle, size and shift as well as distance of objects. The results show improved resolution of the measurements for smaller targets.

Citation Download Citation

Seung You Na, Min-Sang Park, Won-Gul Hwang, and Chang-Doo Kee "Intelligent data processing of an ultrasonic sensor system for pattern recognition improvements", Proc. SPIE 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (31 May 1999); https://doi.org/10.1117/12.349756

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KEYWORDS

Sensors

Ultrasonics

Pattern recognition

Transmitters

Distance measurement

Receivers

Transducers

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