发明名称 |
Monitoring apparatus and control apparatus for traffic signal lights |
摘要 |
The invention relates to monitoring apparatus and control apparatus for fail-safe monitoring for normal operation of traffic signal lights provided at an intersection or the like where a plurality of roads intersect. The illumination conditions of respective signal lights are detected using a sensor device, and when the number of illuminated or non illuminated signal lights is a predetermined number, a normal judgment output of logic value 1 corresponding to a high energy condition is generated while when the number of illuminated or non illuminated signal lights is not the predetermined number, an abnormal judgment output of logic value 0 corresponding to a low energy condition is generated. As a result, in the case for example of a fault in the monitoring apparatus so that the output stops, the resultant output condition is the same as for a danger condition due to a signal light abnormality. Hence extremely safe signal light monitoring and control is possible with excellent fail-safe characteristics.
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申请公布号 |
US2002008629(A1) |
申请公布日期 |
2002.01.24 |
申请号 |
US20010756267 |
申请日期 |
2001.01.09 |
申请人 |
THE NIPPON SIGNAL CO., LTD. |
发明人 |
JINNO YOSHITAKA;OZAKI YOSHIHARU;OKADA NORIHIRO;MAZAWA HEISAKU;FUJIMOTO HIDETOSHI;TODA JUNYA;FUTSUHARA KOICHI;ASADA NORIHIRO |
分类号 |
G08G1/097;(IPC1-7):G08B21/00 |
主分类号 |
G08G1/097 |
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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