Analysis

Math library

Math library inside Dewsoft X offers unlimited signal processing capabilities, but makes common processing techniques just one click away. Math library functionalities are offered out of the box:

• Formula: custom formula editor
• FIltering: FIR, IIR, FFR, integration, derivation
• Statistics: RMS, Average, Min, Max, Std deviation, variance, classification, counting, array statistics, ...
• Reference curve: time and frequency domain, vector and XY reference curves
• Time domain analysis: Delay channel, Integral, derivative,  Latch value math, Scope math, Time-to-vector transform
• Frequency domain analysis: Cepstrum, Correlation, Exact frequency, Fourier transform, Full spectrum, Octave analysis, Short-time Fourier transform
• Machinery diagnostics: Angle sensor math, Combustion noise, Envelope detection, Sine processing (COLA), Tracking filter

• Counting procedures: counting

• Acoustics: Acoustic weighting filters

• Control systems: PID control

• Strain, stress: Strain rossette

• Constants: Vectors, Matrix constant

Formula editor

Formula editor offers all major arithmetic, logic, algebra and measure functions to be combined with one or more measured input signals or existing math channel to create sophisticated calculations. Includes measure, events and channel properties sections which can be used in calculations.

Formula editor allows to combine following math and logical computations: 

• Basic operators: plus, minus, multiply, divide, div, mod and power
• Functions: square, square root, absolute, truncate, random, logarithm (base2), logarithm (base10), natural logarithm, exponent, if condition, min, max
• Trigonometry: sin, cos, tan, asin, acos, atan, Pi
• Logic: less than, equal, more than, less than or equal, more than or equal, not equal, not, and, or, xor
• Signals: number of samples acquired, sample rate, time elapsed, sine wave, square wave, triangular wave, noise
• Measure: pulse width, stopwatch, 
• Events: key press events

Filters

Filters are grouped into three filter modules: 

• IIR filter
• FIR filter
• Frequency domain filter

Classical electrical filters like Chebyshev, Butterworth, and Bessel can be applied using IIR filter module. These filters also allow single and double differentiation and integration.

When signals are filtered using standard FIR filter it introduces a phase shift. The output signal is delayed compared with an input signal. Dewesoft FIR filter is smarter and filters data without any phase shift or delay. This is perfect and can be used also for analysis of signals which does not allow having phase shifting or delay.

Frequency domain filter performs an FFT calculation and cuts a certain range of signal to create sharpest possible filtering.

Basic statistics

The basic statistics module provides basic statistical quantities of the signal:

• RMS and Quadratic RMS
• Average
• Median
• Peak and Peak-peak
• Crest factor
• Sum
• Minimum and maximum
• Time of minimum and maximum
• Variance
• COV
• Standard deviation

There are five basic calculation modes. Block based, Running, Single value, Triggered blocks and Start-stop blocks. Statistical function is selected as an output channel.

Power analysis

Power application module provides high-performance tools for calculation of power, harmonics, and related parameters. Together with our high-performance DAQ hardware offers a total solution for power analysis, power quality, E-Mobility and other power-related applications.

The unique system architecture allows our solution to handle a couple of tasks within the same device. It combines the functionality of power analyzer, combustion analyzer, data logger, scope, vectorscope, transient recorder and an FFT – Harmonics Analyser. It offers acquisition of different signals (analog, digital, counter, CAN, video, ...) simultaneously storing them in a single data file.

Power analysis

Power application module provides all the power-related calculations and functionalities:

• More than 300 calculated parameters

• Power analysis for 1-12 phase AC systems Star-Delta Calculation of RMS values and Waveform

• Voltage, Currents (RMS, rm, ave) and Frequency

• Active, Reactive & Apparend Power (P, Q, S, PF, cos phi, etc.)

• Distortion and Distortion Factors (D, DH, QH, K, THD I, THD U)

• Period Values with overlap for detailed fault analysis

For more information visit Power analysis PRO training online course.

Power quality analysis

The same power module also offers calculations and visualization for power quality analysis according to IEC standards. Functionalities include:

• Class A Power quality Analyser according to IEC 61000-4-30

• Harmonic Analysis up to 150 kHz according to IEC61000-4-7

• Flicker and Rapid Voltage Changes according to IEC61000-4-15

• Flicker emission according to IEC64000-21

• Unbalance and Symmetrical components (zero, positive and negative sequence)

• Power Quality Reports according to FGW-TR3

For more information visit Power quality PRO training online course.

Other features

Raw data storing

Software and hardware offer raw data storing with up to 1 MS/s. Scope and vectorscope views are also available.

FFT analysis

The same solution also provides very flexible and easy to use FFT analyzer. It is able to calculate and visualize harmonic FFT, full FFT, and 3D waterfall FFT.

Transient recording

Recorder offer streaming of unlimited data and math channels directly to computers hard-drive with more than > 500 MB continuous stream rate. Triggering on analog, math or power channels is possible - e.g. trigger on voltage unbalance, frequency deviation, voltage dips, etc.

Order tracking

Order tracking module makes it extremely easy to take time domain data and transform it into the angular (order) domain. It can extract any number of harmonics (amplitude and phase angles) which can be displayed in Bode, Nyquist, 3D FFT, real-time x-y and orbit plot. The plane view FFT clearly shows the excitation forces, natural frequencies, and all the resonances to give a clear picture of the dynamic behavior of the machine.

Any input can be used: microphone, accelerometer and even the output of the torsional vibration module (see below). The patented digital counters technology (Supercounter®) provides very accurate and repeatable measurements. Results are represented on 3D color spectrogram and 2D graph for selected order and phase extraction over RPM.

Main features

Order tracking module features:

• Simple and easy to setup
• Dedicated re-sampling method for sharp order separation
• Measurement in time domain to keep all benefits
• 2D, 3D waterfall in order or frequency domain
• Amplitude, phase extraction
• Recalculation in post-processing
• Phase synchronous rpm input with 12.5 ns resolution

For more information please visit Order tracking PRO training online course.

Balancing

The module provides an easy to use tool for single and dual plane balancing to cancel out the vibrations caused by the first order.

The setup itself is very simple. Connect the angle and vibration sensors. The module will guide you step by step trough balancing procedure. First record the initial run, then add a trial mass at the appropriate angle. Steps can be repeated if required. All results and the raw data are stored in the data file.

For more information please visit Field balancing PRO training online course. 

Main features

The balancing module offer following capabilities:

• A wizard-like user interface which guides you through all the steps
• Order tracking based balancing method
• Single or dual plane
• Multiple balancing for two directions saves time (X, Y)
• A 2D graph for the plane view
• RPM channel with a color indicator (rpm range)
• Alarm output if velocity exceeds a predefined value
• Displays tacho probe time signal to set trigger
• Vector polar plots of 1st order of all runs (initial, trail, ...)
• Weight splitting
• Acceleration, velocity, displacement in the recorder
• Time domain measurement

Sound level meter

Sound level meter module can calculate typical parameters for sound level measurements from a single microphone. The solution can be used as the typical sound level meter with A, B, C or D weighting. With our high dynamic 160 dB dual 24-bit SIRIUS DAQ systems it can easily fulfill all the requirements for Class I sound level meter.

The module provides real-time sound level calculations according to the international standards IEC61672, IEC60651, IEC60804. Any combination of frequency and time weighting can be calculated. The statistical values are calculated over the whole range or with the custom specific entered block size.

For more information please visit Sound level meter PRO training online course.

Main features

The sound level meter module offer following capabilities:

• Real-time narrow band FFT
• 1/1, 1/3, 1/12, 1/24 band octave spectrum
  

• A simple method to extract min/max/avg values over the whole spectrum or a specific frequency range

• A-, B-, C-, D-weighting (frequency weighting)
• Fast-, Slow-, Impulse-weighting (time weighting)
• Leq-Calculation
• Sound level meter
• Current maximum sound level (dB)
  
• Equivalent sound level (dB)
  
• Pulse weighted equivalent sound level (dB)
  
• Absolute maximal sound level (dB)
  
• Sound exposure [dB]
  
• Maximum and minimum Lp sound level
  
• Classes for 0, 1, 1, 5, 10, 50, 90, 95 and 90 dB
  

Human body vibrations

Human body vibration module provides a measurement of the effect of vibrations on the human body. Especially in the working places exposed to high vibrations, there is a big chance of permanent damage to some parts of human body.

The human vibration module provides measurements to be able to decide the risk of such damage. The module is compliant with the following standards:

• ISO 2631-1,
• ISO 8041 and
• ISO 2631-5.

For more information please visit Human vibration PRO training online course.

Open math interface

Dewesoft X allows to extend software with custom math and analysis features using DCOM plugin technology and your programming language of choice. Visit developers section for programming guide and example code.