Data acquisition system scans 50,000 samples/s for dynamic testing

February 24, 2016 // By Paul Buckley
Micro-Measurements has introduced the company's first high-speed data acquisition system for dynamic test and measurement applications.

Featuring a scanner with 12 RJ-45 strain gage inputs and four configurable auxiliary slots to accommodate signals from thermocouples, piezoelectric sensors (both charge mode and voltage mode), and high-level voltage sensors, the System 9000 StrainSmart Data Acquisition System provides scanning rates up to 50,000 samples/second; supports full-, half-, or quarter-bridge configurations; and offers built-in precision bridge completion for 120 Ω, 350 Ω, and 1000 Ω bridges.

Optimized for automotive, aerospace, rail, consumer, and military testing applications, all System 9000 channels are sampled simultaneously. Users can deploy scanners independently or use up to three together for 48 channels (36 strain gage and 12 configurable) of fully synchronized data acquisition. Each channel's data is processed in a 24-bit digital signal processor with filtering via finite impulse response (FIR) multi-state filters for excellent noise rejection, stability, and unsurpassed measurement accuracy. The processors over-sample data at a rate of 128 times the selected rate, providing high-quality, low-noise data at rates of 50,000, 25,000, 10,000, and 5,000 samples/second - without the need for signal averaging.

The System 9000's scanner communicates with a host PC via an auto-configured 100 Mbit DHCP Ethernet connection. Micro-Measurements' StrainSmart software, available separately, is ideal for configuring, controlling, and acquiring data from the system. To eliminate downtime associated with sending the unit back to the factory for periodic calibration, the System 9000 is available with an optional system voltage calibration card. The card allows the gain and offset of each channel to be calibrated under actual operating conditions, minimizing errors due to environmental factors.