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US 5,205,176 AGranted
Ultrasonic load cell with transducer
AssigneeUltrafast, Inc.
InventorIan E. Kibblewhite
Life of this patent
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Abstract
A load indicating cell and a method of manufacturing a load indicating cell are disclosed and claimed. An ultrasonic transducer, grown on one surface of a load bearing member, such as a fastener, is used to determine the length, stress or other tensile load dependent characteristic of the member using ultrasonic techniques.
Claims41
A method of making a load indicating cell comprising the steps of:
- providing a load bearing member subjected to deformation when stressed such that one portion thereof moves relative to another portion thereof, said load bearing member having a first surface functioning as a first electrode;
- and
- growing ultrasonic transducer means including an acoustoelectric film directly on said first surface adapted to mechanically, electrically and acoustically interconnect said acoustoelectric film to said first surface.
A load indicating cell comprising:
- a load bearing member adapted to deform when stressed and having a first surface functioning as a first electrode;
- ultrasonic transducer means including an acoustoelectric film grown directly on and conforming to said first surface of said load bearing member so as to mechanically, electrically, and acoustically interconnect said acoustoelectric film to said first surface.
A load indicating cell comprising:
- a load bearing member adapted to deform when stressed and having a first surface functioning as a first electrode;
- and
- ultrasonic transducer means including:
- (a) a second electrode, and
- (b) an acoustoelectric film grown directly on and conforming to the surface of said second electrode so as to mechanically, electrically, and acoustically interconnect said acoustoelectric film to said second electrode,
- said acoustoelectric film mechanically, acoustically, and electrically interconnected to said first surface of said load bearing member and adapted to electrically isolate said first electrode from said second electrode.
3 more elements
Dependencies are inferred from the claim text.