| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vibration frequency detector which allows a vibration frequency to be accurately measured without requiring a cable. <P>SOLUTION: A vibration frequency detector comprises: a housing 1 installed in a structure; and a plurality of vibrators 4 having a leaf spring (spring member) 2 and a weight 3. The leaf spring 2 includes an end part 2a which is cantilever-supported on an inside of the housing 1, and a small cross-sectional part 6 formed on a portion between both end parts and having a cross sectional area smaller than the other portion, while the weight 3 is respectively connected to the other end part 2b of the leaf spring 2. The plurality of vibrators 4 are constructed in such a way as to break at the small cross-sectional part 6 when the leaf spring 2 is vibrated respectively with the weight 3 and stress equal to or greater than a specified value is generated at the small cross-sectional part 6, and such that a dimension L in a lengthwise direction of the leaf spring 2 and a dimension b in a width direction orthogonal to the lengthwise direction are different from each other, while each eigenfrequency is different. <P>COPYRIGHT: (C)2013,JPO&INPIT |
