Vibration analysis

The advantages of vibration analysis in the context of predictive maintenance

Vibration analysis and vibration analysis

Vibration analysis is an important part of the maintenance of machines and systems. Vibrations can be recorded and analyzed on site using measurement technology devices such as acceleration sensors and vibration measuring devices. This data is then evaluated using special software to identify possible causes of the vibrations. Based on this analysis, targeted measures can then be introduced to eliminate the problems in order to avoid breakdowns and improve the efficiency of the systems.

Detect machine vibrations

Recording machine vibrations is a field of application that can vary greatly due to its approaches and objectives. The general aim is to detect changes in the operating condition as part of condition monitoring through regular or permanent recording and vibration analysis of machine vibrations, as well as to analyze machine vibrations in order to diagnose damage or optimize operational safety and production quality.

Depending on the measurement task, the sensor technology used and the respective machine type, there may be different requirements for the measurement technology for vibration analysis.

What are standard signals in vibration analysis?

In order for physical process variables, such as temperatures, humidity or pressures, to be processed by evaluation devices, they must be converted into standardized electrical signals. These signals can be transmitted either as current or voltage signals.

In the vast majority of applications, current signals are preferred to voltage signals. The advantage of current signals is their insensitivity to electromagnetic interference. Voltage losses due to line resistances are also not to be expected with current signals.

Where is vibration analysis used in industry?

There are many different causes of vibrations in machinery with rotating and other moving components. Such specific sources of interference are, for example

  • Toothing errors in the gearboxes
  • Pronounced wave curvatures
  • Imbalances and misalignment
  • Foundation problems
  • Additional vortex vibrations due to liquids and gases
  • Electromagnetic interference
  • Certain cavity formations in rapidly flowing liquids
  • Deposits on fan elements
  • Wear of rolling bearings
  • Disturbed concentricity of plain bearings

Even a single technically faulty system within a rotating machine park can be enough to bring the entire production to a standstill.

For this reason, the areas of application of predictive vibration analysis in industry are very numerous. They relate in particular to

  • Motors with drives of all kinds
  • Industrial pumps
  • Technical gearboxes
  • Fans and other ventilation systems
  • Compressors and other compression systems
  • Rotating rollers and their bearings
  • Turbines and other systems in power plants
  • Special wind turbines

Solutions for vibration analysis

Measuring devices and data loggers are used to record the sensor measurement data. It is particularly important to note that special measuring devices with an extremely high sampling rate must be used.

With the Expert Vibro device from Delphin is a versatile and powerful measuring device for vibration analysis. It offers up to 16 synchronous and galvanically isolated analog inputs with a sampling rate of 50 kHz per channel for the acquisition of sensor data.

The inputs of the Expert Vibro are universally configurable on the software side and enable flexible recording of currents, voltages and IEPE sensors. Another user-friendly feature is that the individual analog inputs can be assigned individually to one of the 4 trigger groups with freely configurable comparators for keyphasor sensors. These functions provide maximum flexibility for every measuring task.

Application highlights of vibration analysis

  • Synchronous, parallel detection of up to 16 vibration signals/device
  • Simultaneous acquisition of vibration and process signals
  • Self-sufficient and therefore safe vibration monitoring
  • Can be used as a subsystem on existing process control systems
  • Determination of characteristic values (peak-peak, gap), order analysis
  • Data logger memory for autonomous long-term recording of machine history
  • Monitoring/alarming (SMS, e-mail)
  • Reporting to higher-level control systems via PROFIBUS-DP or Modbus RTU/TCP
  • Analysis of on/off-line measured values on the workstation PC
  • Evaluation with orbit, FFT, cascade, y(t) diagram and others
  • Calculation of envelope frequency spectrum and vibration velocity
  • Powerful vibration diagnosis system for autonomous long-term recording through integrated data memory
  • Universal connection options for acceleration, velocity or distance sensors
  • Small compact design and high channel density for easy installation in control cabinets

Vibration analysis without a PC

The Expert Vibro is a PC-independent measurement and control system that can be operated and configured intuitively. This means that raw signals, time signals and their spectra can be generated with ease. For in-depth analyses, you can further process the respective vibration signal with numerous optional modules in order to obtain the maximum information content. All common characteristic values, algorithms, filters, integrators, software channels and other parameters are available here, with which the signal can be individually evaluated for the measurement task.

Vibration analysis with the measuring case

With the mobile solution from Delphin, both the analysis and elimination of vibration problems in vibration measurement technology can be carried out flexibly and easily directly on site.

Vibration analysis with Delphin Technology

Vibration measurement technology from Delphin is aimed at users whose task is vibration monitoring, vibration analysis and damage diagnosis. The simple handling, the favorable cost/benefit ratio and the possibility of integrating vibration monitoring into process monitoring offer many advantages compared to other products.

We would be happy to present our products for modern vibration analysis to you in detail. Get in touch with our team of experts right away and let us advise you without obligation!

The right software for your measurement and testing solution

Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
Vibro
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
ProfiSignal Go
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
ProfiSignal Basic
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
ProfiSignal Klicks
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
Delphin Data Center
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
ProfiSignal 20 Basic
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
ProfiSignal 20 Go
Vibro

Addition of special vibration measurement diagrams

The additional function "Vibro" supplements ProfiSignal with the diagrams FFT, cascade, time signal, bode, envelope curve as well as orbit and spectrogram. This makes it possible to display the vibration values measured and calculated with the vibration measurement device. The orbit and trend diagram enables, among other things, the graphical representation of the kinetic wave path.

To the product
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
ProfiSignal Go

Data acquisition and analysis

With ProfiSignal Go you can display online data from the Message and Expert hardware in diagram form. Numerous analysis functions, such as zoom, cursor, movable axes, flags, ASCII export and calculation channels, enable fast display of measured values and post-processing.

To the product
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
ProfiSignal Basic

Operating and monitoring

ProfiSignal Basic combines the functions of ProfiSignal Go with operating and monitoring elements of process visualisations, e.g. digital and analogue displays, switches, buttons and signal lamps. With Basic, you can create everything from simple visualisation diagrams to complex visualisation systems.

To the product
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
ProfiSignal Klicks

Automate and control

ProfiSignal Klicks supplements ProfiSignal Basic with functions for process automation. Structural diagrams for mapping the process as well as a script language (completely operable with the mouse) enable even the non-informatician to create complex test stand and automation applications with automatic report generation.

To the product
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
Delphin Data Center

Central measurement data management

The Delphin Data Center is the solution used for the worldwide measurement networking and control of plants, machines and test stands.

To the product
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
ProfiSignal 20 Basic

Visualisation and operation

With ProfiSignal 20 Basic you can create individual diagrams using a wide range of operating and monitoring elements. Both continuous processes (e.g. production data acquisition) and discontinuous measurement tasks (e.g. test measurements) can be visualised, operated and monitored without any programming effort. You can create the operating and monitoring diagrams by assembling and configuring the prefabricated elements.

To the product
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.
ProfiSignal 20 Go

Fast project planning and analysis of measurement data

With ProfiSignal 20 Go you can visualise your measurement data in just a few steps, both online and offline, in various diagram types, monitor, analyse, archive as a measurement file or export directly in the appropriate file format.

To the product
Whether voltages, temperatures or humidity: data loggers enable the monitoring of different measured variables and are therefore versatile.