发明名称 |
Self-aligning ultrasonic sensor system, apparatus and method for detecting surface vibrations |
摘要 |
Ultrasonic transducing elements (11, 12) are used to measure vibrations of a nearby musical drumhead or other vibrating surface (13). A first ultrasonic transducer (11) emits an ultrasonic signal (14) and a second ultrasonic transducer (12) listens for an echo of that signal (14). A phase change of the echoed (reflected) signal (202) is compared to a reference signal (206) to create a representation signal (216) which represents the movement of the drumhead or other vibrating surface (13). For this comparison to be properly made, a deviation signal (220) is generated that defines an average deviation of the reference signal (206) from optimum, which is then used to self-align the referee signal (206) to the reflected signal (202).
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申请公布号 |
US2004065188(A1) |
申请公布日期 |
2004.04.08 |
申请号 |
US20030250723 |
申请日期 |
2003.07.08 |
申请人 |
STUEBNER FRED E.;ARONSTEIN JESSE |
发明人 |
STUEBNER FRED E.;ARONSTEIN JESSE |
分类号 |
G01H3/12;G01H9/00;G01N29/07;G01N29/42;G01N29/44;(IPC1-7):G10H3/00 |
主分类号 |
G01H3/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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