Accession Number : ADD005877

Title :   Brinell Sandwich Transducer.

Descriptive Note : Patent,


Personal Author(s) : Peekna,Andres

Report Date : 16 May 1978

Pagination or Media Count : 6

Abstract : The instant Brinell sandwich transducer has a layer of small hardened steel balls between two layers of softer materials. The balls may be closely packed or separated into a less dense array by a spacer. Indentations in the softer materials indicate the maximum compressive forces that have been applied to the balls. The diameters of identations in a sampling pattern are measured by a microscope since such diameters indicate the magnitude of the forces which have been registered by the transducer. Good resolution over a range of more than a factor of 100 has been obtained. With pulses ranging from static to approximately half-sines with rise times of 0.1 millisecond and a fall time of 0.1 millisecond, rate effects have been insignificant. That is, the indicated gauge pressure is not sensitive to the rate at which the pressure is applied for a broad range of pulse rise times and durations. Also, these guages incorporate high axial stiffness and flat geometry. (Author)

Descriptors :   *Patents, *Pressure transducers, Sandwich construction

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE