rocket test stand with powerdna cube, and ai-225

8/14/2019 Rocket Test Stand with PowerDNA Cube, and AI-225

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2007 United Electronic Industries, Inc. All Rights Reserved.

Rocket Test Stand Ap


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Rocket Test Stand Application:

A large military research acility needed to acquire high speed dynamicdata rom a rocket test stand. The types o measurements were pres-sures, pressure dierentials, temperature, strain, uid ow, orce, and mechan-

ical strain. The application presented several signifcant design challenges,starting with a very tight budget, plus stringent requirements or simultane-

ous sampling o all measurement sensors.

Wide physical separation o sensors and long cable runs to the host computer

system also made the use o multiple PowerDNA cubes mounted directly on

the test stand and interconnected via Ethernet a very attractive option.

The need or simultaneous sampling and or running at dierent scan rates

or two classes o sensors were met by using the standard UEI DNA-AI-225

Analog Input Layer. The requirement or per-channel signal conditioning

hardware was met by the use o standard UEI accessory panels with individualbridge completion resistors (or strain gauge sensors) and with automatic

CJC/Open TC detection or thermocouple inputs. The specifcation or auto-

matic thermocouple linearization was easily met by the standard UEI Frame-

work sotware supplied with each Cube.

System Description

The system was designed as an Ethernet distributed network with three

multi-layer PowerDNA Cubes, each with up to 6 25-channel Analog Input

boards. Each I/O board accepts voltage or millivolt signals ro

gauge type sensors and/or thermocouples mounted at vario

throughout the test stand a total capability o up to 375 in

the Cubes directly on the test stand and using Ethernet or Cmunication reduced the need or expensive ront-end wiring

The hal-bridge strain gauge sensors are used or measuring

sure dierentials, uid ow, and mechanical strain. Excitation

vided by a user-supplied power source, the output o which

monitored as a separate analog input.

Product Description / Usage

DNA-PPC8 Ethernet PowerDNA Cubes, each with upIncludes UEIDAQ Framework Sotware Su

DNA-AI-225 25-channel, 24-bit simultaneous samplinmonitor strain gauge sensors and thermo

DNA-STP-AI-U Universal Screw Terminal Panels provide pensation/open TC detection or thermo

bridge completion resistors/excitation vo

or strain gauge sensors.


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Rocket Test Stand UEI Products Used:

Each Cube handles up to six I/O layers, select-

ed rom as many as 25 standard types, has an

SD card, external sync input/output connec-

tor, serial comm port, and standard Ethernet

In/Out connections. Each cube also includes

a powerul data acquisition sotware suite

compatible with all popular data acquisition

application packages.

DNA-AI-225:The DNA-AI-225 Analog Input Layers each have 25 independent

A/D converters, one or each channel, that provide simultaneoussampling o 25 analog inputs at scan rates as high as 1000 sam-

ples/second. They accept dierential voltage or millivolt signals in

the range o -1.25V to +1.25VDC.DNA-PPC8

DNA-STP-AI-U:These accessory panels have a acility or add

tion resistors or strain gauge sensors, and arbuilt-in isothermal block/cold junction temp

thermocouple inputs. The panels also provid

or thermocouples.

Sotware:The UEIDAQ Framework Sotware Suite comes with bindings or all major programming languages and test-programming

including C, C++, C#, VB.NET as well as Excel, OPC, MATLAB, DASYLab, TestPoint, Agilent VEE, LabVIEW or Windows, LabVIEW

LabWindows/CVI.


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Founded in 990, UEI is a leader in the computer based data acquisition and con-

trol industry. Serving customers world-wide, UEI products based upon PCI, PXI, ISA

and Ethernet interaces oer unequaled perormance as well as fexibility. We are

committed to providing the highest quality hardware, sotware and services, en-

abling engineers and scientists to interace data-acquisition and control hardware

to the real world. Through our state-o-the-art technologies we serve the needs o

individual researchers and developers as well as OEMs.

2007 United Electronic Industries, Inc.

rocket test stand with powerdna cube, and ai-225

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