大学物理 ›› 2012, Vol. 31 ›› Issue (3): 40-40.
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黄贞[1] 李栋宇[1] 黄广华[1] 韦杰[2]
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摘要： 基于薄膜动圈式声-电转换原理,利用次声波产生的空气微压波动带动薄膜上线圈受迫振动,引起线圈内磁通量的变化产生感应电动势,将声信号转换成电信号进行采集,设计便携式次声监测装置.在模拟简谐次声环境中的测量结果表明,该装置能够准确地测量出振动频率,并对其幅度进行监测.
关键词: 次声频率, 薄膜振动, 动圈式声-电转换
Abstract: This paper introduces a method to measure infrasound wave by the use of moving coil sonic-electric converting principle.Air-core under the shield is forced to vibrate by the air micro-pressure flow coursed by infrasound wave,then the value of magnetic flux is changed and the generation of induced electromotive force is caused,thus infrasound signal is converted into electrical signal.According to the result testing in the simulation environment of infrasound,this device can measure the infrasound signal correctly.
Key words: infrasound wave, film vibration, moving coil sonic-electric converting
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黄贞[] 李栋宇[] 黄广华[] 韦杰[]. 基于薄膜动圈式的次声波监测装置设计[J]. 大学物理, 2012, 31(3): 40-40.
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