Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Device actuated by presence of land vehicle
Patent
1995-09-28
1997-06-24
Pihulic, Daniel T.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Device actuated by presence of land vehicle
194217, G01S 1308
Patent
active
056421192
ABSTRACT:
A low-powered electronic parking meter which can be powered solely by non-rechargeable, commercially available batteries. The meter includes a coin receptor with unique means for coin detection, slug detection, determination of coin denomination, and jam detection, which require very little power. The coin detection and denomination determination are performed using pivotable lever arms in contact with Piezo strips. The slug detection uses a permanent magnet mounted opposite a reed switch and the jam detection is performed by IR diode emitters and photocells. The meter also includes processing means, a liquid crystal display, a sonar transducer or alternatively an RF transmitter and receiver (RADAR) for detecting the presence of vehicles, and an IR transceiver enabling parking authority personnel to communicate with the meter. The components of the meter are operated in three conditions or states including an off state, an inactive state, and an active state, to provide further conservation of power so that the meter is entirely operated by non-rechargeable batteries.
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Intelligent Devices, Inc.
Pihulic Daniel T.
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