---------------------- multipart/alternative attachment A. Accelerometers An accelerometer is a linear seismic transducer which produces an electric charge proportional to the applied acceleration. A simple model of an accelerometer is shown in \Fig{accelerometer1}(a). A mass is supported on a piece of piezoelectric ceramic crystal which is fastened to the frame of the transducer body. Piezoelectric materials have the property that if they are compressed or sheared, they produce an electric potential between their extremities, and this electric potential is proportional to the amount of compression or shear. As the frame experiences an upward acceleration it also experiences a displacement. Because the mass is attached to the frame through the spring-like piezoelectric element, the resulting displacement it experiences is of different phase and amplitude than the displacement of the frame. This relative displacement between the frame and mass causes the piezoelectric crystal to be compressed, giving off a voltage proportional to the acceleration of the frame. [Image] -- Richard Brekne RPT, N.P.T.F. Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html ---------------------- multipart/alternative attachment --------------95F8B620B406882461ADD5C7 An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/11/b5/ea/98/attachment.htm --------------95F8B620B406882461ADD5C7 A non-text attachment was scrubbed... Name: C:\\WINDOWS\\TEMP\\nsmailB4.gif Type: image/gif Size: 2794 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/4d/e8/a2/2f/nsmailB4.gif --------------95F8B620B406882461ADD5C7-- ---------------------- multipart/alternative attachment--
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