![]() a division of Zoltech Corporation
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VolksMeter II Seismometer/Tiltmeter Sensor Technology |
The VolksMeter uses a unique, patented*,
Symmetric Differential Capacitor (SDC) array sensor to detect and measure
minute accelerations and tilts. The sensor consists of two fixed printed
circuit boards holding the transmitting and receiving capacitor plates and a
moving Faraday shield array, mounted on the end of a pendulum. When
subjected to accelerations or tilts, the shield array on the pendulum moves
relative to the fixed plates and changes the amount of receiving plate that
is exposed to or shielded from the transmitting plates. This, in turn,
changes the overall capacitance of the sensor. A magnetic eddy damper,
located below the sensor plates, damps oscillations of the pendulum. A
direct Capacitance-To-Digital-Converter (CDC) chip converts the current
capacitance of the sensor array to a 24-bit number. An interface board in
the VolksMeter controls the CDC chip and formats the acquired data for
transmission to the support computer. * U.S. Patent Number 5,461,319
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![]() VolksMeter Sensor Components |
![]() Sensor Assembly |
![]() Interface Board with Capacitance To Digital Converters |
16009 Arminta Street, Van Nuys, CA 91406 USA - 818-780-1800 - FAX 818-780-1978 - http://rllinstruments.com |
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