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).
|
申请公布号 |
WO02065068(A8) |
申请公布日期 |
2004.08.19 |
申请号 |
WO2002US00573 |
申请日期 |
2002.01.09 |
申请人 |
PROTUNE CORP.;STUEBNER, FRED;ARONSTEIN, JESSE |
发明人 |
STUEBNER, FRED;ARONSTEIN, JESSE |
分类号 |
G01H3/12;G01H9/00;G01N29/07;G01N29/42;G01N29/44;(IPC1-7):G01H9/00 |
主分类号 |
G01H3/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|