Durability testing, high cycle fatigue and noise identification
It is impossible to imagine modern vehicles without electronics. Not only do electronics control vehicles; they are increasingly powering them too. This is precisely why reliable electronics are critical for market success. Vibration and impact loads are therefore extensively tested prior to SOP.
The non-contact vibration sensors from Polytec are ideal for dealing with these problems. The high-sensitivity laser technology reliably detects vibration-related weak points on printed circuit boards or individual components, right down to individual bond wires. Modal tests and order analyses quickly provide the right data for component, PCB, enclosure and attachment optimization.
The additional noises produced by pumps, adjusting drives and fans can be heard much more clearly if the combustion engine is not being used as a masking noise factor in electric or hybrid vehicles running in electric mode. There is also the high-performance electronics, which add a new source of high acoustic sharpness to the vehicle acoustics. Laser vibrometers from Polytec enable clear 3D visualization and quantification of transfer paths into vehicle interiors and efficiently identify source of noise on electronics boards. Polytec laser Doppler vibrometers are the testing instruments of choice worldwide of OEM and tier 1 suppliers.
Vibration analysis in electric mobility (EV)
Wheel hub motors are advantageous for the packaging, but on the other hand they lead to new challenges in terms of noise development due to the installation position. The Otto von Guericke University in Magdeburg examined external rotor electric motors using operating vibration analysis with Polytec laser vibrometers in order to understand and optimize the component behavior and the resulting acoustics of wheel hub motors. Read the exclusive article with complete measurement results after a short registration.
Related products
VibroOne
The laser Doppler vibrometer VibroOne® is the one-box solution for non-contact vibration measurement up to 3 MHz. It is specifically designed for tightly packed setups, whether in research laboratories, challenging production environments or for non-contact analysis of tiny details on microstructures or biomedical probes. The optional inline HD+ camera helps positioning the laser precisely and provides proper test documentation.
VibroFlex
With the modular laser vibrometer VibroFlex, Polytec introduces the new flexibility in optical vibration measurement with a modular sensor solution up to 24 MHz that adapts to the user’s needs: Add microscope objectives for observing tiny structures or measure noise, vibration, harshness (NVH) on large, complex samples like machinery, motors etc. Discover acoustics and vibration phenomena in research and product development for a faster time-to-market or reliably and cost-efficiently inspect production parts in-line. Also, find out how the new and patented QTec® multi-path interferometry pushes the limits for best SNR.
PSV-500-3D Scanning Vibrometer
The PSV-500-3D Scanning Vibrometer measures 3D dynamics in research and product development in a reliable and precise way. Its visible HeNe laser provides outstanding SNR on well-reflecting sample surfaces and is ideal for small samples and under water. The deflection shapes and Eigenmodes detected help you with everything from NVH, acoustic and structurally dynamic issues to ultrasonic analyses, FEM validation and non-destructive testing from DC to 25 MHz.
Further applications in automotive
- Modal analysis
![Experimental modal analysis and modal testing]( "Experimental modal analysis and modal testing")
Experimental modal analysis and modal testing - Tire acoustics
![Operational deflection shape rolling tire]()
- Drive train
![Vibration testing on drive trains, measuring on rotating shafts with RLV Rotational Laser Vibrometer]( "Vibration testing on drive trains, measuring on rotating shafts with RLV Rotational Laser Vibrometer")
Vibration testing on drive trains, measuring on rotating shafts with RLV Rotational Laser Vibrometer - Aero acoustics
![Aeroacoustic windtunnel measurement with laser scanning vibrometers from Polytec]( "Aeroacoustic windtunnel measurement with laser scanning vibrometers from Polytec")
Aeroacoustic windtunnel measurement with laser scanning vibrometers from Polytec - NVH testing
![Numerical simulation approaches allow better predicting of acoustic performance of component connections and NVH, © Polytec and Volvo Car Corporation]( "Numerical simulation approaches allow better predicting of acoustic performance of component connections and NVH, © Polytec and Volvo Car Corporation")
Numerical simulation approaches allow better predicting of acoustic performance of component
connections and NVH, © Polytec and Volvo Car Corporation - Body-in-white
![Modal testing of a body-in-white]( "Modal testing of a body-in-white")
Modal testing of a body-in-white - Brake acoustics
![Deflection shape analysis visualizing brake squeal, acoustical and dynamic behaviour]( "Deflection shape analysis visualizing brake squeal, acoustical and dynamic behaviour")
Deflection shape analysis visualizing brake squeal, acoustical and dynamic behaviour - Haptic displays
![Laser vibration measurement for testing and validating haptics displays]( "Laser vibration measurement for testing and validating haptics displays")
Laser vibration measurement for testing and validating haptics displays
