Method and apparatus for testing timbers for disconformity...

Details Method and apparatus for testing timbers for disconformity... Method and apparatus for testing timbers for disconformity...

G - Physics

01

N

349/42

G01N 29/04 (2006.01) G01N 3/36 (2006.01)

Patent

CA 1293559

ABSTRACT Method and apparatus for testing timbers for disconformity or decay. A method for testing timbers, such as railway sleepers, for disconformities or decay by inducing vibrations in the timber, for example with an impactor monitored by means of an accelerometer mounted on it and connected to a microprocessor and a display unit to give an indication of constant impact, detecting said vibrations by one or more transducers, amplifying and digitising the transducer output and microrocessor-processing the digitised output to give an indication of disconformity or decay. One embodiment utilises the comparison of the first half-cycle surface vibrations and shear vibrations. Another embodiment compares frequency domain information with a memory stored standard. The apparatus, comprising transducers, impactor, microprocessor and indicating means is readily portable. 084BF CS

546972

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