WEIGHT FALL BUFFER IN RIGIDOMETER OF GROUND

PROBLEM TO BE SOLVED: To enable coping with rigid ground in a wide range without exchanging shock absorbing material and further improve measurement precision, in an apparatus for measuring rigidity of a ground based on reaction force from the ground and displacement of the ground to the impact forc...

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Bibliographic Details
Main Authors FUJIO TAKAHIRO, SEKINE ETSUO, OKANO HARUKI, KAMIURA MASAKI
Format Patent
LanguageEnglish
Published 26.08.2004
Edition7
Subjects
MEASURING
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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Summary:PROBLEM TO BE SOLVED: To enable coping with rigid ground in a wide range without exchanging shock absorbing material and further improve measurement precision, in an apparatus for measuring rigidity of a ground based on reaction force from the ground and displacement of the ground to the impact force which is generated by dropping a weight 3 and transmitted to the ground A through the shock absorbing material. SOLUTION: A compound coil spring 19 having a plurality of upper and lower coils different in spring rate is used as the shock absorbing material. On a substrate of low rigidity, a reaction force waveform which is ready in buffering action of the coil of small spring rate can be obtained. Also on a ground of high rigidity, a reaction force waveform which is ready in buffering action of a coil of large spring rate can be obtained. COPYRIGHT: (C)2004,JPO&NCIPI
Bibliography:Application Number: JP20030027807