| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a glass breakage detector for an automobile window glass, which is improved in detection precision of a window glass breakage. <P>SOLUTION: A piezo film 50 of the glass breakage detector 20 is stuck on a glass plate 13, and outputs voltage caused by distortion in accompany with a crack in the glass plate 13 when the glass plate 13 is cracked. When a part of the glass plate 13 is broken and cracks are generated in the whole glass plate, the piezo film 50 outputs voltage caused by distortion due to a crack in the glass plate 13 to a signal processing unit 22. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
