The time-varying Lorentz force causes ions vibrate in the medium, which can be detected by a sensitive acoustic sensor non-invasively. 变化的洛仑兹力使媒质中的离子发生振动,这个振动可由外部的声传感器灵敏而无创地检测到。
Is it possible that an acoustic sensor which size is only 10 cm can form a narrow directivity with a constantbeam of 20 degree? 尺度仅为10cm的声传感器能在数赫兹到数千赫兹的低频宽带范围内形成束宽为20余度的恒定束宽窄指向性吗?
Passive acoustic DoA(Direction-of-Arrival)estimate using acoustic sensor array is a kind of key technology in intelligent mine system. 被动声定位是智能地雷的关键技术之一,其中声传感器阵列测向确定了目标的方位角信息。
A new type of optical fiber underwater acoustic sensor (hydrophone) constructed with two fiber Bragg gratings (FBG) with signal self-demodulation function is presented. 提出了一种新型的光纤布拉格光栅(FBG)水声传感探头结构以及光纤光栅传感信号的自解调方法。
The built system could pick up sound signals within effective time by acoustic sensor and the MFCC characteristic parameter was chosen as observation sequence. 论文阐述了通过软件方式根据声音信号识别阀门泄漏的方法。