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ALARM DEVICE, FAILURE DETECTION METHOD FOR ALARM DEVICE, RAILROAD CROSSING ALARM, AND FAILURE DETECTION METHOD FOR RAILROAD CROSSING ALARM
ALARM DEVICE, FAILURE DETECTION METHOD FOR ALARM DEVICE, RAILROAD CROSSING ALARM, AND FAILURE DETECTION METHOD FOR RAILROAD CROSSING ALARM
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机译：警报设备，警报设备的故障检测方法，铁路交叉警报以及铁路交叉警报的故障检测方法
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摘要
PROBLEM TO BE SOLVED: To provide an alarm device having a relatively simple circuit configuration for enabling even an ordinary person to recognize the presence/absence of a failure without participating in any special training.;SOLUTION: This alarm device 1 including: an oscillation circuit 21; and an oscillation circuit 31 synthesizes an acoustic signal f1 to be transmitted from the oscillation circuit 21 with an acoustic signal f2 to be transmitted from the oscillation circuit 31, and outputs a synthesis signal. Then, the alarm device 1 includes: an oscillation circuit 12 for failure detection for transmitting an acoustic signal f3 for failure detection as an acoustic signal different from the acoustic signals f1 and f2 to be transmitted from the oscillation circuit 21 or the oscillation circuit 31; and means for branching the acoustic signal f3 to be transmitted from the oscillation circuit 12 for failure detection into two, and for superimposing one acoustic signal f3 with the acoustic signal f1 to be transmitted from the oscillation circuit 21, and for superimposing the other acoustic signal f3 with the acoustic signal f2 to be transmitted from the oscillation circuit 31 by inverting the phase.;COPYRIGHT: (C)2015,JPO&INPIT
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