| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless-strain measuring system that provides one chip integrating a strain-detector, an amplifier, and a signal transducer, and can simply measure changes in fatigue life, by a compact sensor, arised from strain changes of a resin material, a rubber material, and concrete of a general industrial machinery. SOLUTION: Three RF sensors are respectively mounted on the plate 18 in strain measuring directions which are differently placed by an angle of 45 degrees. The plate 18 is bonded to the lower part of the inner surface of the recess of a rectangular parallelepiped 22 that has an elastic modulus of Young's modulus of silicon or less, which has an inside dimension nearly equal to one side of the plate 18. Three RF sensors are respectively mounted on the plate 19 in strain measuring directions which are differently placed by an angle of 45 degrees. The plate 19 is bonded to the side of the inner surface of the rectangular parallelepiped 22. Three RF sensors are respectively mounted on the plate 20 in strain measuring directions which are differently placed by an angle of 45 degrees. The plate 20 is bonded to the front of the inner surface of the rectangular parallelepiped 22. Then, a cover 23 with each side equal to length of that of the rectangular parallelepiped 22 is mounted on the upper part of the rectangular parallelepiped 22. COPYRIGHT: (C)2007,JPO&INPIT
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