Compact High Channel Count, High Frequency, Rotating Data Acquisition and Transmission

ABSTRACT:In order to address the expanding need for high fidelity, wide bandwidth data acquisition for an increasing number of sensors in high speed rotating environments, Progeny Systems proposes a reliable, ultra-compact data acquisition system that advances the state of the art using cutting edge components and a novel architecture that is modular, scalable, and easy to install. The proposed system, called the Compact Scalable Data Acquisition System, employs a highly configurable design that can interface with, signal condition, and simultaneously sample up to 480 sensor channels at greater than 300kS/s. The approach overcomes the limitations associated with the inability to pass large quantities of wires through analog slip rings. The proposed system supports both high channel count and high bandwidth requirements without necessitating any modification to the existing 300-wire slip ring or hub cover plate. The design significantly reduces the required slip ring wire count, enabling application to higher RPM systems.BENEFIT:Existing data acquisition approaches for rotating sensor measurements utilize high wire count analog slip rings and non-rotating external signal conditioning and digitization. The slip ring limits the quantity of sensors that can be passed to the DAQ at any given time, resulting in costly rig tear down for measurement reconfiguration. Passing raw sensor data through the slip ring and over long able lengths results in added noise and signal degradation. The CS-DAQ, embedded in the rotating shaft, provides access to all sensor data without costly rig tear down, while improving measurement quality.