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AssigneeImv Corporation
InventorsToshiyuki Kobayashi, Takao Kawahira
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An acceleration sensor core unit 1 includes a circuit board 3 and metallic plates 4, 5. The circuit board 3 is made of an epoxy resin, and an acceleration sensor 11 for detecting vibration acceleration in an arrow 105 direction is mounted thereon. The circuit board 3 is sandwiched between the metallic plates 4, 5. Ring-shaped metallic spacers 7a to 7c and ring-shaped metallic spacers 8a to 8c are respectively interposed between the circuit board 3 and the metallic plate 4 and between the circuit board 3 and the metallic plate 5. The circuit board 3 is screwed to each of the metallic plates 4, 5 at three positions. Thus, it is possible to reliably fix the circuit board 3 to the metallic plates 4, 5 with a small attachment space. In this way, rigidity as the acceleration sensor core unit 1 can be secured.
An acceleration sensor core unit configured to detect vibration acceleration at frequencies of 10 KHz or higher comprising:
A deflection prevention method for preventing a deflection of a base board having a surface on which an acceleration sensor is mounted, the sensor detecting vibration acceleration at frequency of 10 KHz or higher, the deflection prevention method comprising:
Dependencies are inferred from the claim text.