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    • 9. 发明公开
    • 광 음향전기 장치
    • 具有大动力范围的电力传感器和分析机械振动和声音的方法
    • KR1020050012675A
    • 2005-02-02
    • KR1020040057568
    • 2004-07-23
    • 가부시끼가이샤 도시바
    • 스즈끼가즈히로후나끼히데유끼시게나까게이따로오노도미오사까이다다시나루세유지로이이다요시노리후지와라이꾸오
    • H04R23/00H04R1/38
    • G01H9/00H04R23/008H04R1/38H04R2430/20
    • PURPOSE: An acoustoelectric transducer and a method for analyzing mechanical vibration and sound are provided to have large dynamic range and to use for various purposes with a small size by using a diffraction grating and a photo detector. CONSTITUTION: An acoustoelectric transducer comprises a diaphragm(2) having a diffraction grating, for vibrating by an external force; a light source(1) for irradiating the diffraction grating; a photo detector(3) for detecting the light diffracted by the diffraction grating, and for converting the detected light into an electric signal. Wherein, the vibration displacement of the diaphragm(2) is converted into an electric signal. And a method for analyzing mechanical vibration and sound, comprises the steps of: irradiating light modulated by a repetitive periodic signal on the diaphragm; detecting the diffracted light and converting the detected light into the electric signal; demodulating the electric signal with the repetitive periodic signal.
    • 目的:提供声电换能器和分析机械振动和声音的方法以具有大的动态范围,并且通过使用衍射光栅和光电检测器用于具有小尺寸的各种目的。 构成:声电换能器包括具有衍射光栅的振膜(2),用于通过外力振动; 用于照射衍射光栅的光源(1); 用于检测由衍射光栅衍射的光并用于将检测到的光转换成电信号的光电检测器(3)。 其中,振动板(2)的振动位移被转换为电信号。 一种用于分析机械振动和声音的方法,包括以下步骤:将由重复周期信号调制的光照射在隔膜上; 检测衍射光并将检测到的光转换成电信号; 用重复周期信号解调电信号。