DEWESOFT SIRIUS User Manual

SIRIUS®
8.2.1 Synchronisation Glossary
8.2.1.1 Sampling
The analogue signals that we want to measure are
continuous time signals. Since all computer based systems
are digital, we need to convert those continuous time
signals to discrete time signals: this process is called
sampling.
A sample refers to a value at a point in time.
The Illustration 215 shows the continuous analogue
signal.
Illustration 215: Continuous signal
Illustration 216 below shows the sampled version of the
signal in Illustration 215. The actual data consists only of
the sampled points that you see as red dots in the diagram.
The lines in between the points are just interpolated.
Illustration 217 below shows another sampled version of
the signal in Illustration 215. But in comparison to
Illustration 216 we used a lower sample rate in this case.
Because of the lower sample rate, we have fewer data
points acquired and thus the interpolated signal does not
resemble the original signal as good as Illustration 216
does.
Illustration 216: Sampled (discrete) signal
Illustration 217: Slower sampled (discrete) signal
The sampling rate (aka. sample rate, sampling frequency) defines the number of samples per second taken from the
continuous signal to create the discrete signal. The unit for the sampling rate is hertz (Hz) .
The inverse of the sampling frequency is the sampling period or sampling interval, which is the time between samples.
8.2.1.2 Clock
A clock signal is a particular type of signal that oscillates between a high and a low state and is utilized like a
metronome to coordinate actions.
E.g. each SIRIUS® chassis has an internal clock. The sampling of the data-points is always correlated to this clock – so
that the data-points of all channels (on all modules) refer to the same point in time
25
.
25 Like all real-world devices also the clock generator of SIRIUS® is not ideal. But this is negligible related to the sample rates.
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DEWESOFT SIRIUS Specifications

General

Resolution	24-bit
Isolation	Channel-to-channel and channel-to-ground
Interface	USB
Software	DewesoftX data acquisition software
Bandwidth	DC to 50 kHz (depending on module type)
Humidity	non-condensing
Analog Inputs	Voltage, IEPE, Charge, Current, Strain Gage, Thermocouple, RTD, Resistance, LVDT, Bridge

Summary

Notice

Safety Instructions

Critical safety guidelines for operating the SIRIUS system.

Getting Started

Software Installation

Guide to installing DEWESoft software for the SIRIUS system.

DEWESoft Installation

Step-by-step instructions for installing DEWESoft software.

Connecting a Single Slice

Instructions for connecting a single SIRIUS slice to a PC via USB.

Analogue Channel Setup

Troubleshooting

Common issues and solutions for SIRIUS device detection by DEWESoft.

Enclosure Overview

SIRIUS-SBOX2 Overview

SIRIUS-SBOX2 Specifications

Technical and physical specifications for the SIRIUS-SBOX2.

SIRIUSf-SBOX Overview

SIRIUSf-SBOX Specifications

Technical and physical specifications for the SIRIUSf-SBOX.

SIRIUS-R2D Overview

SIRIUS-R8 Overview

SIRIUS-R8 Specifications

Technical and physical specifications for the SIRIUS-R8.

SIRIUS-R8D Overview

SIRIUS-R8D Specifications

Technical and physical specifications for the SIRIUS-R8D.

SIRIUS Measurement Modules

Data Transfer Overview

USB Data Transfer

SIRIUS Dual Core Technology

SIRIUS HD Series Technology

SIRIUS HS Series Technology

SIRIUS Slice Configuration

Options for configuring SIRIUS slices with various modules.

SIRIUS Dual Core Specifications

Detailed specifications for SIRIUS Dual Core modules.

SIRIUS HD and HS Specifications

Specifications for SIRIUS High Density and High Speed modules.

General Specifications

ACC and ACC+ Modules

Details on ACC and ACC+ modules for sound and vibration IEPE.

ACC Module Specifications

Technical specifications for the SIRIUS ACC module.

ACC+ Module with Counter

CHG and CHG+ Modules

Details on CHG and CHG+ modules for charge measurements.

CHG Module Specifications

Technical specifications for the SIRIUS CHG module.

HV Modules

Information on HV modules for high voltage measurements.

HVv2 Module Specifications

Technical specifications for the SIRIUS HVv2 module.

LV and LV+ Modules

Details on LV and LV+ modules for voltage and strain measurements.

LVv2 Module Specifications

Technical specifications for the SIRIUS LVv2 module.

LV+ Module with Counter

MULTI Modules

Details on MULTI modules for multi-purpose analogue/digital I/O.

MULTI Module Specifications

Technical specifications for the SIRIUS MULTI module.

STGM and STGM+ Modules

Information on STGM modules for strain gauge and voltage measurements.

STGMv2 Module Specifications

Technical specifications for the SIRIUS STGMv2 module.

STGM+ Module with Counter

STGM-DB Module

STG and STG+ Modules

Information on STG modules for strain gauge, voltage, and resistance.

STGv2 Module Specifications

Technical specifications for the SIRIUS STGv2 module.

STG+ Module with Counter

HD-ACC Modules

Details on HD-ACC modules for high density applications.

HD-ACC Module Specifications

Technical specifications for the SIRIUS HD-ACC module.

HD-LV Modules

Details on HD-LV modules for high density low voltage measurements.

HD-LV Module Specifications

Technical specifications for the SIRIUS HD-LV module.

HD-STGS Modules

Details on HD-STGS modules for high density strain gauge measurements.

HD-STGS Module Specifications

Technical specifications for the SIRIUS HD-STGS module.

HS-ACC and HS-ACC+ Modules

Details on HS-ACC/ACC+ modules for high speed sound/vibration.

HS-ACC Module Specifications

Technical specifications for the SIRIUS HS-ACC module.

HS-ACC+ Module with Counter

HS-CHG and HS-CHG+ Modules

Details on HS-CHG/CHG+ modules for high speed charge measurements.

HS-CHG Module Specifications

Technical specifications for the SIRIUS HS-CHG module.

HS-CHG+ Module with Counter

HS-HV Modules

Details on HS-HV modules for high speed high voltage measurements.

HS-HV Module Specifications

Technical specifications for the SIRIUS HS-HV module.

HS-LV and HS-LV+ Modules

Details on HS-LV/LV+ modules for high speed low voltage measurements.

HS-LV Module Specifications

Technical specifications for the SIRIUS HS-LV module.

HS-LV+ Module with Counter

HS-STG and HS-STG+ Modules

Details on HS-STG/STG+ modules for high speed strain gauge measurements.

HS-STG Module Specifications

Technical specifications for the SIRIUS HS-STG module.

HS-STG+ Module with Counter

Measurement

Filtering Capabilities

Covers filtering capabilities of SIRIUS modules and DEWESoft software.

Aliasing in Signal Processing

Filter Design Principles

Sampling and Digital Filtering

Oversampling and Digital Filtering

Analogue, Oversampling, and Digital Filters

Combined effect of analogue, oversampling, and digital filtering.

SIRIUS DualCore & HD Anti-Aliasing

Strategies used by SIRIUS DualCore/HD for anti-aliasing.

SIRIUS ADC Oversampling

SIRIUS Digital ADC Filter

SIRIUS Anti-Aliasing Filter

Overview of filters and sampling rates for anti-aliasing.

DEWESoft Custom Low Pass Filters

Advanced Topics

Wireless Connection Setup

Hosted Network on Windows 7

Android WiFi Connection

Android VNC Connection

Data Synchronization

Importance and methods of synchronizing data from multiple channels.

Synchronization Options

Synchronizing Multiple SIRIUS Chassis

Synchronizing Across Multiple PCs

Firmware Upgrade Procedure

Guide on how to upgrade the firmware of SIRIUS measurement systems.

Firmware Upgrade Preparation

Steps required before performing a firmware upgrade.

Downloading Firmware and Tools

Instructions for downloading necessary firmware and upgrade tools.

Extracting Firmware Files

System Firmware Upgrade

Process for uploading system firmware to SIRIUS.

Module Firmware Upgrade

Process for upgrading firmware for individual SIRIUS modules.

Firmware Upgrade Troubleshooting

Solutions for common issues during firmware upgrades.