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Elastic-wave detection sensor which sandwiches a part of a drive enclosure

IP.com Disclosure Number: IPCOM000225048D
Publication Date: 2013-Jan-23
Document File: 1 page(s) / 101K

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Abstract

Two strain sensors are attached on a drive enclosure sandwiching a part of the drive enclosure from both sides. A summation of the responses of the strain sensors is utilized to detect the stress wave, avoiding detection of bending vibration.

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Elastic-wave detection sensor which sandwiches a part of a drive enclosure

  A shock sensor has been utilized to detect shock events. However, the shock sensor may detect external vibration which should not be detected by the sensor.

To avoid this situation, two strain sensors are attached on a drive enclosure sandwiching a part of the drive enclosure from both sides as shown in Fig. 1. A summation of the responses of the strain sensors is utilized to detect the stress wave induced by the shock events, avoiding detection of bending vibration due to the external vibration as shown in Fig. 2.

The strain sensor utilized in this invention can be resistive material or piezo material.

Disclosed by Hitachi Corporation

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