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

ABSTRACT:Crossfield proposes to develop a modular rotating data acquisition and signal conditioning device with simultaneous sampling on all channels, up to a 150 kHz flat bandwidth, a 400 kHz sample rate, a 21-bit ADC resolution, noise less than +/- 0.5 percent of full scale, programmable gain from 1 to 10,000, a programmable anti-alias cutoff frequency, scalable to as many as 256 channels, that will fit within a 3.5-inch diameter by a 3-inch length, and is capable of rotating at up to 25,000 RPM. The device will store data from all channels on-board for the 2.5-second duration of a test plus some pre-trigger and post-test data.BENEFIT:This program will produce compact data acquisition instrumentation that will operate in extreme environmental conditions. This instrumentation can be used to test turbine engines and for energy exploration. Variations of the design can be used in a wide range of instrumentation applications that employ temperature (RTD, thermocouple) sensors, or almost any type of 4-wire or voltage output type sensors.