Industrial applications

The range of industrial applications is so wide that they can be hardly covered in only few sentences. With the use of all possible inputs, extensive math, trigger functions and DCOM capabilities, the customers are using DEWESoft in lots of different ways. Here are only few basic application.


Development testing

When it comes to development, the new products must be checked in terms of performance, long term stability, electrical testing, noise and vibration and other. Dewesoft software is one of the very rare software packages which can do everything at once. Imagine for example an electro motor. It must be checked for mechanical performance (RPM, torque), electrical performance with all analysis (voltage, current, power, efficiency, electrical troubles), for operational parameters like temperatures over longer time as well as sound and vibration picture, usually related to load and speed. Dewesoft software is flexible enough to perform all these measurements at once, if needed. It's all a matter of setting up the system.


Production testing

Of course all these measurements can be used also for production tests. Automated reports can be generated from Dewesoft software with the use of post processing packages like Flexpro of Excel. The usage of DCOM provides means of automated operation as well as different ways of storage - for example database storage.


Structural testing

When designing the vehicle, all mechanical parts are done with the use of computer and qualified with finite element method to determine natural frequencies of the structures. However, the need to check those method is needed more than ever to produce a closed loop to correct the models that they fit the measurement results. Dewesoft software FRF module adds the ability to import the geometry models, measure transfer functions with the use of either hammer or shaker excitation and see fascinating animation of the structures on the fly. Data can be easily exported to UFF format for further processing.

Order tracking

When determining how the structures behave under real operating conditions, order tracking provides the means of seeing the structural response to real life excitation. The rotating parts of the vehicle like engine, shafts or the wheels creates excitation forces on the structure. Did you ever had a car starting to rattle and shake at certain vehicle speed? This car was for sure not tested with DEWESoft and those high vibrations were result resonance frequencies of some elements at certain input frequencies.

By measuring rotating speed and the response (in terms of vibration, noise and others) the Nyquist, Bode and three dimensional FFTs are generated on the fly giving clear picture of the frequencies having a problem.

Torsional vibration

If the acceleration sensors provides information about linear movement, torsional vibration procedure provides the information about angular vibration. Imagine a long shaft going through the vehicle. Like each structure has linear natural frequencies, this shaft will have angular natural frequencies resulting at high angular vibration at certain rotation speed. To check the bending of the shaft, we mount any kind of angular sensor on each end of the shaft and measure the angle difference. The data can be used in order tracking to give a clear indication of natural frequencies.

Acoustics

Frequency analysis is a big issue in acoustics. Octave and fractional octave bands are used for this in most cases. DS MOD DSA provides an extensive choice of tools for frequency analysis, where all weighting functions for time and frequency weighting are implemented. For complex acoustic analysis, advanced measurement tools are available in addition to the standard analysis tools.

Main features:

  • Real time narrow band FFT
  • 1/1, 1/3, 1/12, 1/24 band octave spectrum
  • A, B, C and D-weighting (frequency weighting)
  • Fast, slow, impulse-weighting (time weighting)
  • Leq-calculation
  • Sound level meter

Post-processing features

  • FFT, octave analysis and weighting
  • Sound level meter
  • Sound power measurement

Balancing

Rotating machines and engines produce vibration from many sources, including rotational and torsional vibration. Also unbalanced rotating parts are sources for vibration. Unbalanced masses are distributed by the rotor causing vibration. To balance a system, we have to measure and correct the masses so that the rotor is returned to a balanced condition.

Dewesoft provides an easy-to-use and straight-forward tool for single and dual plane balancing. This add-on is included as an option in every Dewesoft instrument. One or two acceleration sensors and a tacho probe are needed.

Main features:

  • Easy to use, step-by-step user interface
  • Order tracking based balancing method
  • Single or dual plane
  • Multiple balancing for two directions saves time (X, Y)
  • 2D graph for plane view
  • RPM channel with color indicator (rpm range)
  • Alarm output if velocity exceeds 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 recorder
  • Time domain measurement

Dewesoft software has a very nice power module providing power (voltage, current, active, reactive, total power) and power quality (harmonics, flicker) parameters adding the value to the measurements in industry. The products can be checked for power efficiency as well as how they are affected by the fluctuation of the grid and how they are affecting the power grid.

The quality of these measurements are the same as if you would buy a dedicated power instrument, but the greatest advantage is that Dewesoft software is able to acquire other data sources at the same time, giving a total solution for all the needed tests.

The distributed data acquisition in industry gives a very nice opportunity to the users to create a stack of high speed data acquisition devices. When we are talking about measurement of thousands of channels, there are more dedicated solutions which are cheaper than using Dewesoft.

But all those solution have a major disadvantage - they are limited in functions and acquisition rates. When we want to measure high speed data like voltage and current or vibrations, we need higher data rates as well as lots of online processing to reduce amount of data to some key parameters. In terms of critical events, data can be acquired with the high speed to capture a transient event.

When it comes to high speed applications, Dewesoft products can be used to capture high speed data and high speed video at the same time. Data can be acquired with up to 80 MB/second in stream mode (limited only by amount of hard disk space) or using on board memory capabilities acquiring data with hundreds of million samples per seconds.

As we all know, picture tells more than hundred words (or data points in our case) and therefore Dewesoft software supports acquisition of high speed video data. Video signals up to 100 frames per second can be streamed to the hard disk, but we can also use high speed video cameras with more than 100000 frames per seconds (the amount of time is limited by the memory of the camera).

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