Experimental characterization of ultrasonic phased arrays for the nondestructive evaluation of concrete structures
- Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Civil and Environmental Engineering
Novel ultrasonic phased arrays were developed and their feasibility was tested for assessing the condition of concrete structures. These sensors are based on low frequency ultrasound technology, which, to date, has been the preferred method for concrete testing. By combining multiple transducer elements in a linear configuration, dynamic phase focusing and steering of the ultrasound beam is possible. An automated testing assembly was used to assess the steering and focusing performance of the array in a cementitious medium. Experimental results demonstrate excellent steerability and accuracy when compared to the numerical simulation presented. The effective steering and focusing behavior in concrete signifies that phased arrays can be used as the primary imaging and scanning device for large scale concrete structures.
- OSTI ID:
- 355660
- Journal Information:
- Materials Evaluation, Vol. 57, Issue 2; Other Information: PBD: Feb 1999
- Country of Publication:
- United States
- Language:
- English
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