Frequency Test Stand | VTS

Overview

Cost and time reduction

By easing the operation of the software and a high safety level it is possible that normal workers can do the measurements of the test objects. This leads to a reduction of costs and enables the test in the production line. The deviations from the tolerances are detected very early and bad parts can be sorted out. To reach this goal the automation of the following steps was done:

With this support a measurement is done with a few mouse clicks.

Measurement

The blade is excitated with an impact hammer and the vibration answer is measured with a microphone or a laser. A high precise data acquisition system ensures the accuracy of the measurement.

Software

The main focus during the development was to create an easy to use and very functional software. The result is a program that can be used for nearly every quality test. The following key features are available:

With this support a measurement is done with a few mouse clicks.

All setups and measurement data are saved in an local data base, but can also be stored on an main server. The export to Excel or SAP is implemented and with the “Office-Function” it is possible to setup the parameter or define or edit the test sequences form the office PC via the network.

Applications

Standard Teststand

Maul-Theet offers three different standard configurations for determining the natural frequencies. In addition, inputs for pressure and temperature measurement are available.

1.VTS stand alone

This solution includes all equipment required for the vibration measurement (modal hammer, sensors, data acquisition) as well as a PC with software. It is independent of the clamping device or excitation. As soon as the clamping force has been confirmed, it is possible to start the vibration measurement and the determination of the resonance frequencies. The data can be saved and reports generated.

2. VTS with manual hydraulics

This solution includes a manually operated hydraulic unit. It is integrated in a test bench made of aluminum profiles, which also houses the clamping unit. The design of the test bench can be adapted to the customer’s application. The clamping force can be adjusted via a toggle switch. It is possible to measure the clamping force with the VTS controller and display it in the VTS software. For clamping forces outside the permissible range, the vibration measurement is automatically blocked by the VTS software.

3. VTS with PLC controlled hydraulics

This solution has a PLC control of the hydraulic unit. The PLC controls the proportional valves to preload, tension and control the clamping force during vibration measurement. The pressure accumulators ensure that the clamping forces remain stable for up to 20 minutes without pump operation during experimental measurements. With PLC-controlled hydraulic clamping forces of up to 650 kN are possible.

VTS test stand configurator