发明授权
- 专利标题： Vehicle speed measurement apparatus
- 专利标题（中）： 车速测量装置
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申请号： US904623申请日： 1992-06-26
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公开(公告)号： US5554907A公开(公告)日： 1996-09-10
- 发明人: Donald A. Dixon
- 申请人： Donald A. Dixon
- 申请人地址： MD Columbia
- 专利权人： Mitron Systems Corporation
- 当前专利权人： Mitron Systems Corporation
- 当前专利权人地址： MD Columbia
- 主分类号： E01F9/529
- IPC分类号： E01F9/529 ; G08G1/02 ; G08G1/052 ; H01L41/113 ; H01L41/08
摘要：
A vehicle speed monitoring system has a pair of parallel piezoelectric sensors or pressure transducers carried in closely spaced relation by a common elastomeric carrier such that the distance D between the sensors is maintained constant. A time measuring circuit connected to the sensors measures the time between peak voltages induced in the piezoelectric sensor transducers which is used to calculate and display vehicle speed. A weight is secured to or embedded in the carrier to cause the carrier to hug the roadway and be immune to lifting because of air currents and turbulence.
公开/授权文献
- US5961774A Method of holding substrate and substrate holding system 公开/授权日：1999-10-05
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