发明名称 |
External source for rail track worker warning installation |
摘要 |
The external source (1) has a sensor for detecting a train. The sensor closes an electrical contact (8), and couples an alarm voltage to a 2-wire line (9) for electrical connection with a central unit positioned at the working location. An AC voltage generator provides the alarm voltage and a test voltage of different frequency, used for testing the function of the 2-wire line and the central unit. The voltage generator may use a quartz oscillator (2,2') and 2 frequency dividers (3,4 ; 3',4').
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申请公布号 |
DE19639994(A1) |
申请公布日期 |
1998.04.09 |
申请号 |
DE19961039994 |
申请日期 |
1996.09.18 |
申请人 |
EBS EISENBAHNSICHERUNG AG, BASEL, CH |
发明人 |
FIEDLER, HELMUT, 21423 WINSEN, DE;KRUEGER, WOLFGANG, 21481 LAUENBURG, DE |
分类号 |
B61L23/06;(IPC1-7):B61L23/06 |
主分类号 |
B61L23/06 |
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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