Drop shock measurement system and acceleration sensor element used in the same

• US 20060048575A1
• Filed: 11/07/2005
• Published: 03/09/2006
• Est. Priority Date: 08/09/2001
• Status: Abandoned Application

• Current Assignee: Hirofumi Tajika, Kazunari Nishihara, Koji Nomura, Motoyuki Toji
• Original Assignee: Hirofumi Tajika, Kazunari Nishihara, Koji Nomura, Motoyuki Toji
• Inventors: Nomura, Koji, Tajika, Hirofumi, Toji, Motoyuki, Nishihara, Kazunari
• Application Number:
  US11/268,193
• Publication Number:
  US 20060048575A1
• Time in Patent Office: Days
• US Class Current: 73/514.290
• CPC Class Codes: G01N 2291/02827 Elastic parameters, strength or force
• CPC Class Codes: G01P 15/0891 with indication of predetermined acceleration values G01P15/135 takes precedence
• CPC Class Codes: G01P 15/0922 of the bending or flexing mode type
• CPC Class Codes: G01P 15/097 by vibratory elements

Abstract

The drop impact measuring system has i) a plurality of bimorph-type acceleration sensor containing a plurality of free vibrating sections each of which has individual draw-out electrodes; ii) a switch section for selecting output from the bimorph-type acceleration sensors; iii) an amplifying circuit for amplifying a signal applied via the switch section from the acceleration sensors; and iv) a logic circuit for logically evaluating the output from the amplifying circuit and controlling the switch section according to the result acquired from the logical evaluation.

Claims

1. A bimorph-type acceleration sensor element, which is used for a bimorph-type acceleration sensor, comprising i) a plurality of free vibrating sections having a both-ends-supported beam structure;

and ii) draw-out electrodes for drawing out a signal generated in the free vibrating sections.

2. The bimorph-type acceleration sensor element of claim 1, wherein the plurality of the free vibrating sections are of different lengths and are electrically independent.

3. The bimorph-type acceleration sensor element of claim 1, wherein the plurality of the free vibrating sections are of identical length and are electrically connected in parallel.