KNUCKLE MEASURING DEVICE

• Main Author: KASHIWAI YOSHIO
• Format: Patent
• Language: English
• Published: 30.06.2005
• Edition: 7
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

PROBLEM TO BE SOLVED: To improve durability and measurement accuracy as a measuring device by the use of an optical fiber distortion sensor. SOLUTION: The knuckle measuring device is so constituted that between the rigid bodies which are estranged each other with elasticity or a machinery hinge, and are combined, while fixing base edges to one rigid body, a pair of metal rods for displacement detection which make both front edges face the rigid body of the other side respectively are made to intervene, further each front edge of the pair of metal rods for displacement detection is individually interlocked with one fixed edge of the pair of optical fiber distortion sensor incorporated in the other rigid body. Accordingly, it is made possible to catch the displacement of the point of application accompanying displacement of the knuckle between rigid bodies, so that the amounts of displacement, such as the ground, can be measured very correctly. Even if the elastic hinge or machinery hinge which connects between rigid bodies expands or contracts by a temperature change, since both the metal rods of the pair located in the both sides which sandwich this expand and contract almost proportionally, there is no need for an amendment, so that knuckle measurement is always performed properly, regardless of environmental temperature changes. COPYRIGHT: (C)2005,JPO&NCIPI