Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2007-04-03
2007-04-03
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
C073S626000, C073S628000, C073S636000
Reexamination Certificate
active
10129016
ABSTRACT:
The present invention relates to a failure detecting system that enables the detection of a break in a rail and the like by a simple network configuration. Detecting units (20and50), relay units (30A,30B,60A through60C) and terminal units (40and70) are arranged along rails (11, 11A and11B). Using the rails (11, 11A and11B) as transmission media, ultrasonic waves transmitted from the detecting units (20and50) are transmitted to the terminal units (40and70) by the relay units (30A,30B,60A through60C), and when the terminal units (40and70) receive the ultrasonic waves, the ultrasonic waves are returned from the terminal units (40and70), relayed by the relay units (30A,30B,60A through60C), and transmitted to the detecting units (20and50). Thus, it is judged whether there is a break in the rails (11, 11A and11B), based on the ultrasonic wave reception state in the detecting units (20and50).
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Morisada Akira
Sakai Masayoshi
Shirai Toshihito
Hanley John C.
Laubscher, Jr. Lawrence E.
The Nippon Signal Co, Ltd.
Williams Hezron
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