Range selectable contactless data acquisition system for rotating machinery
First Claim
1. In combination with apparatus having a stationary member and a rotational member or rotor adapted to rotate at high speed within said stationary member, a multichannel data acquisition system for acquiring physical measurement data on parts of said rotational member comprising:
- a data collection-transmission portion mounted on and rotatable with said rotational member, said data collection-transmission portion including means to provide a composite digital data signal containing said physical measurement data;
a stationary data reception portion adapted to receive said composite digital data signal, said data reception portion having means for generating an RF signal;
means for inductively coupling said RF signal from said stationary portion to said data collection-transmission portion to provide operating power to said data collection-transmission portion; and
,means for capacitively coupling said composite digital data signal from said data collection-transmission portion to said stationary portion.
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Accused Products
Abstract
A multichannel data acquisition system for physical measurements on rotating members of operating machinery avoids slip rings and radio telemetry for data transfer by providing a capacitive coupling link between rotating and stationary members. Electronic circuitry mounted on the rotating member provides a pulse-code modulated signal containing the measured information for transmission through the capacitive coupling link. Power required to operate the rotating circuitry is inductively coupled from a stationary high-frequency source. The rotating circuitry includes a digital counter whose count is incremented by a momentary power interruption and whose digital output corresponds to a particular measuring range, allowing a range selection to be made during machinery operation.
47 Citations
8 Claims
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1. In combination with apparatus having a stationary member and a rotational member or rotor adapted to rotate at high speed within said stationary member, a multichannel data acquisition system for acquiring physical measurement data on parts of said rotational member comprising:
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a data collection-transmission portion mounted on and rotatable with said rotational member, said data collection-transmission portion including means to provide a composite digital data signal containing said physical measurement data; a stationary data reception portion adapted to receive said composite digital data signal, said data reception portion having means for generating an RF signal; means for inductively coupling said RF signal from said stationary portion to said data collection-transmission portion to provide operating power to said data collection-transmission portion; and
,means for capacitively coupling said composite digital data signal from said data collection-transmission portion to said stationary portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification