[ SIMTEST ] [ sVIEW ] [ sDAQ ]


Portable Data Acquisition System

sDAQ provides an affordable, easy to use, solution for acquiring and analyzing test data. The system incorporates industrial strength data acquisition components from industry leaders and the powerful sVIEW dynamic analysis software to provide a portable measurement and analysis system suitable for a wide variety of applications.

Applications include:

  • Durability Test Development
  • Noise & Vibration Troubleshooting

  • Road Load Data Acquisition

  • Powertrain NVH Development
  • Vehicle NVH Development

  • Rotating Equipment Analysis

The sDAQ sVIEW software includes a full suite of noise and vibration analysis modules that cover a broad range of capabilities from general time history and spectral analysis through fatigue, acoustics, rotating equipment and transient event analysis.

The combination of industrial strength hardware and full capability analysis software make sDAQ an ideal solution for test development and NVH analysis projects that require a powerful but easy to use portable system for capturing and analyzing multi-channel noise and vibration data.

Acquisition Features

The sDAQ analyzer incorporates a compact, lightweight, DC-powered expansion chassis to accommodate state-of-the-art dynamic signal acquisition boards from National Instruments. The chassis fits easily beneath a laptop computer and is connected using a standard a CardBus slot. The built in ICP power supply lets you connect ICP accelerometers and microphones directly to sDAQ without any additional signal conditioning components.
The system can be used as a multi-channel scope, high speed data recorder, or multi-channel spectrum analyzer to provide a versatile tool for noise and vibration analysis and trouble shooting. A simple VCR-like control panel provides the operator with an intuitive interface for configuring and operating the system.

In the scope mode, captured data can be instantly analyzed using the full capabilities of sVIEW. The data recorder mode provides high-speed data acquisition directly to the PC disk with real-time monitoring and automated file handling. As a spectrum analyzer, sDAQ provides a powerful tool for troubleshooting noise and vibration problems.

Hardware features include:
  • DC Powered - no inverter required
  • 8 & 16 Channel Models

  • Simultaneously Sampling

  • 102.4 kHz Maximum Sample Rate

  • 45 kHz Alias-Free Bandwidth

  • 24 Bit Resolution; 110 dB Dynamic Range

  • +/- 10V Input Range

  • ICP Transducer Power Supply

  • Automated Sensor Calibration

  • Desktop Interface Card Option



Hardware System

Chassis Size: 10 W x 2.57 H x 15.144 D

Chassis Weight: 6.5 lb (16 Channel)

Chassis Power: 9-16 VDC, 100

Operating Temperature: 0 to 50 C

Operating Humidity: 5 to 85% RH, Non-condensing

Number of Channels: 8 & 16 channel models

Sampling: Simultaneous across all channels

Maximum Sample Rate: 102.4 kHz

Bandwidth: 0 - 45 kHz


ADC: Delta-Sigma

Resolution: 24 bits, nominal

Input Range: 10 Volt peak

Coupling: AC & DC, software selectable

AC Coupling Cutoff: 3.4 Hz

ICP Power: 4 mA, 5%, 24 V

Overvoltage Protection: 42.4 V

Interchannel Phase Mismatch: < 1.0 degree @ 51.2 kHz

Interchannel Gain Mismatch: 0.1dB

Real-Time Software    
Setup: Simple setup screens for defining test and measurement parameters. Setup files can be stored and recalled.
Calibration: Automated channel calibration using reference source in dB or engineering units.
Scope Mode: Provides a real-time display of input waveforms. Adjustable time period and axis scaling. Scope can be paused and the data analyzed using the full sVIEW analysis capabilities.
  Spectrum Mode: Real-Time display of multi-channel auto spectra in linear, power, or power density units. Adjustable resolution, bandwidth, a spectral window options.
Data Recording: Store high-speed multi-channel data to disk. Automatic file naming and incrementing options. Open, compact data format includes both test and measurement information. Auto-load option for immediate sVIEW analysis.
Analysis Software (sVIEW)  


Data Viewer

  • Data import, export, editing, and channel math functions.

  • Cursors, Event Markers, and Fatigue Damage Windows.

  • Plot editing tools for figure customization.

  • Copy, paste, and save figures in common graphics formats.

Filtering & Spectral Analysis

  • Digital Filters (LP, HP, BP, Notch, SPL A,B,C)

  • Auto Spectrums (Linear, Power, Density)

  • Spectrograms (vs. Time & Tracked)

  • RMS in Frequency Band (vs. Time & Tracked)

  • Ordinary & Multiple Coherence Functions

  • MIMO Frequency Response & Coherent Response

  • Signal Integration & Differentiation


  • Sound Level (Leq) with SPL Weighting Options.

  • Sound Spectrum with SPL Weighting Options.

  • 1/3-Octave Spectrum (FFT and Filter Methods).

  • Specific Loudness (FFT and Filter Methods).

  • Zwicker Loudness ISO 532B (FFT and Filter Methods).

  • Reverberation Time & Sound Absorption Coefficients.

  • Sound Transmission Loss & Insertion Loss.

Fatigue Analysis

  • Turning Point Reduction and Rainflow Counting.

  • Load, Stress, and Strain Life with Mean Correction.

  • Cumulative Damage & Damage Intensity Functions.

  • Materials Database with editor and viewer functions.

  • Export of drive files in common formats.

Transient Event Analysis

  • Configurable event triggers provide automated selection and identification of transient events.
  • Event data analysis with automatic calculation and display of multiple repeat statistical properties.
  • Data Markers for interactive graphical event identification, annotation and data extraction.
  • Process option templates for automating event location and analysis operations.

Time-Frequency Analysis.

  • Robust time frequency distribution (TFD) algorithm.
  • Extensive TFD graphical display options including image, contour, and rotating 3D surface plots.
  • Optional time and spectral function windows.

Rotating Equipment Analysis

  • Computed Order Tracking.
  • RPM Tracked Order and Frequency Maps.
  • Multi-channel Order Cuts (Tracks).
  • Multi-channel Frequency Cuts.
  • Tachometer signal to RPM conversions.

Batch Processor

  • Control Panel for creating, editing and viewing process status and parameters.
  • Unlimited data set size. Analyze and entire disk of data with a single click.
  • Hierarchal design for building complex analysis procedures with reusable components.
  • Clipboard support for tasks and operations.
Technical Support   Simulation Techniques, Inc.
Simulation Techniques offers a full complement of technical support options for sDAQ and sVIEW including phone and web based support along with various forms of user training and on-site implementation assistance.   Simulation Techniques has been providing dynamic analysis and simulation control products and services to the testing community since 1992. Our staff is comprised of industry-recognized experts in dynamic analysis and control.


Site Design & Development: Daniel Mendez

Copyright 2004 Simulation Techniques

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