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Optimal Vibration Data Acquisition at a Shaker Stand

Delphin Expert Vibro System Measures Test Stand Vibration

Vibration tests are often required during new product development. This involves securing the product to a shaker and then shaking according to set standards. Vibration measurements are taken both at the shaker itself as well as at the test sample. In this brief applications example CAS DataLoggers shows how Expert Vibro Data Acquisition and Control systems are single solutions which handle the necessary measurement acquisition and subsequent evaluation.

 

Vibration Monitoring:

Vibration patterns in the test sample are evaluated according to excitation frequencies. This requires the measurement of frequencies, phase shifts and amplitudes. In these applications, FFTs and appropriate analysis diagrams are also required.

 

Compact Single Solution:

The Delphin Expert Vibro is especially suited to these vibration test applications. The system’s eight or sixteen synchronous inputs allow all the required measurements to be acquired. The device can also simultaneously control the shaker and provide set-point values. The device’s digital outputs monitor characteristic values and are also used for shutting down the test stand in the event of an alarm.

This system uses the latest processor technology, based on powerful FPGAs, enabling 16 synchronous channels to be processed at high sampling rates while requiring minimal space. 24-Bit A/D converters ensure high-precision measurements. Users are able to switch between voltage measurement, IEPE or shaft vibration sensors. Integrated comparators and digital inputs allow flexible triggering. Measurement data is monitored “on the fly” with digital outputs being switched within msecs in the event of limit value violations.

Application Example:

A manufacturer of cooling and air-conditioning equipment currently uses an Expert Vibro device to measure shaker test stands in their research and development work. Multiple synchronous velocity signals are recorded with the data then being evaluated using Delphin ProfiSignal software. There the information can be clearly portrayed in bode diagrams, FFT spectrums or time-signal trends. Raw data can be exported into other analysis programs for more detailed evaluation.

As a SCADA system, ProfiSignal provides all the functions required at a test stand within a single system. Visualization and operation take place via display windows. Users can also opt for the ProfiSignal Klicks programing feature for automating procedures and for producing reports. Users can then create customized measurement procedures for product development and inspection tests for production.

 

Professional Measurement Technology:

Delphin systems can be used for local data acquisition and logging when connected to a PC; for remote unattended data collection connected to the internet; or as stand-alone devices. Delphin products are typically used in the following ways:

  • Message devices for industrial measurement data acquisition
  • ProfiSignal for the automation of testing benches
  • The AMDT – module for vibration monitoring and analysis
  • Remote monitoring of plant and machinery using ProfiSignal Go software
  • Operating DAQ and intelligent processing within Message devices
  • Supplying individual solutions (mobile, control cabinets, 19 inch …..)
  • Developmental services (processing, user interfaces, databases)