公开(公告)号：EP0693031B1

公开(公告)日：1998-03-04

申请号：EP94911082.9

申请日：1994-03-28

申请人： SIEMENS AKTIENGESELLSCHAFT

发明人： HOFFMANN, Josef ,  MAGORI, Valentin

IPC分类号： B61L29/30 ,  G01S13/02 ,  G08B13/184

CPC分类号： H01Q1/3225 ,  G01S13/755 ,  G08B13/184

摘要： In the obstacle-detection device proposed, an emitter (8) transmits an HF interrogation signal (11) across the zone under surveillance to a surface-wave identification mark (1; a, b, c, ...) which has an antenna (5) to receive the interrogation signal (11) and emit a response signal (12a, 12b, ...) and an inter-digital transducer (3;, 3a, 3b, ...) designed to convert the HF interrogation signal (11) into surface waves and to convert surface waves reflected by a reflector into response signals (12a, 12b, ...). A receiver/processing unit (9) receives the response signals (12a, 12b, ...) and processes them in accordance with processing specifications. The invention is intended for use in monitoring railway level crossings.

公开(公告)号：EP0693031A1

公开(公告)日：1996-01-24

申请号：EP94911082.0

申请日：1994-03-28

申请人： SIEMENS AKTIENGESELLSCHAFT

发明人： HOFFMANN, Josef ,  MAGORI, Valentin

IPC分类号： G01S13 ,  G08B13 ,  H01Q1

CPC分类号： H01Q1/3225 ,  G01S13/755 ,  G08B13/184

摘要： In the obstacle-detection device proposed, an emitter (8) transmits an HF interrogation signal (11) across the zone under surveillance to a surface-wave identification mark (1; a, b, c, ...) which has an antenna (5) to receive the interrogation signal (11) and emit a response signal (12a, 12b, ...) and an inter-digital transducer (3;, 3a, 3b, ...) designed to convert the HF interrogation signal (11) into surface waves and to convert surface waves reflected by a reflector into response signals (12a, 12b, ...). A receiver/processing unit (9) receives the response signals (12a, 12b, ...) and processes them in accordance with processing specifications. The invention is intended for use in monitoring railway level crossings.