发明名称 |
2-wire push button station control system for a traffic light controlled intersection |
摘要 |
A 2-wire control system which communicates with a plurality of pole mounted push button stations of the kind that are found at a traffic light controlled intersection via existing pairs of underground wires over which power and data signals are transmitted so as to enable a visually impaired pedestrian to receive both audible and tactile signals regarding the flow of vehicular traffic through the intersection. The 2-wire control system includes a central control unit that is located at a traffic light control cabinet and is connected to a standard traffic signal light controller. The control unit includes a plurality of 2-wire output ports that are connected to respective pairs of the plurality of push button stations. The central control unit also includes a corresponding plurality of on/off controls and data interfaces by which each of the 2-wire output ports thereof is provided with the power and data signals to be transmitted to respective pairs of push button stations depending upon the entry of a pedestrian request and the illumination of a WALK or DON'T WALK message.
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申请公布号 |
US7145476(B2) |
申请公布日期 |
2006.12.05 |
申请号 |
US20040911655 |
申请日期 |
2004.08.05 |
申请人 |
POLARA ENGINEERING, INC. |
发明人 |
BECKWITH LESLIE A.;CRUZ RANDY V. |
分类号 |
G01S15/00;H04B3/36 |
主分类号 |
G01S15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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