Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1992-06-26
1996-09-10
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310319, 310800, 340936, 340933, H01L 4108, G08G 102
Patent
active
055549071
ABSTRACT:
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.
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"A Review of Current Traffic Sensor Technology", Robert M. Tyburski.
Budd Mark O.
Mitron Systems Corporation
Zegeer, Esq. Jim
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