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OPTICAL PENDULUM SEISMIC SENSOR AS WELL AS PROTECTION-AGAINST-DISASTERS ALARM DEVICE AND PROTECTION-AGAINST-DISASTERS ALARM JUDGMENT METHOD USING IT
OPTICAL PENDULUM SEISMIC SENSOR AS WELL AS PROTECTION-AGAINST-DISASTERS ALARM DEVICE AND PROTECTION-AGAINST-DISASTERS ALARM JUDGMENT METHOD USING IT
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机译:光学摆式地震传感器以及防灾报警装置及使用该方法的防灾报警判定方法
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摘要
PROBLEM TO BE SOLVED: To obtain an optical pendulum seismic sensor as a protection-against- disasters alarm device and a protection-against-disasters alarm judgment method, using the sensor, in which a pendulum motion containing a miscelleneous tremor, large-scale seismic waves and small-scale faint seismic waves are discriminated and detected without being subjected to the influence of a noise, in which a malfunction is small, whose performance is stable, whose sensitivity is high and which are low-cost. ;SOLUTION: An optical-miscelleneous-tremor removal means by which only seismic waves are extracted from miscelleneous vibrations detected by a sensor is built in a seismic sensor which optically detects a pendulum motion. The optical-miscelleneous-tremor removal means is composed of the intensity distribution of light, a magnitude relationship and a geometrical arrangement which are formed by the arrangement constitution of an optical component such as a perforated plate 4 or the like which gives a light intensity distribution to light from a light source 1.;COPYRIGHT: (C)1999,JPO
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