What is the Oscillator-demodulator in API670?
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What is the Oscillator-demodulator in API670? Is this thing part of the transmitter (some manufacturers call it a signal regulator) module?
The Oscillator-demodulator in API670 is a signal processing device used for oscillating and demodulating the signals from vibration sensors. It can indeed be regarded as part of a transmitter or signal conditioning module, whose main function is to convert the alternating current signals generated by sensors into direct current signals that can be further processed and analyzed. .
The English translation is oscillator-demodulator; according to the product brochure, its function is to convert displacement signals into voltage signals or current signals. From the picture, it appears to be a component similar to a card that is installed inside a cabinet.
This is clearly a system for measuring shaft vibration; there are two eddy current probes for the X-axis and Y-axis. What you’ve marked as “pre-amplifier” is used to amplify the eddy current signals into voltage signals, which are then sent to the monitoring system. You can take a look at Bentley’s 3500 framework system; it’s clear at a glance.