Efficient validation with ultrasonics
Laser Doppler vibrometers (LDV) help and simplify the development of efficient tools for ultrasonic processes. Laser scanning vibrometers from Polytec are indispensable for FE model validation and have proven their worth in many industries and applications, such as wire bonding, ultrasonic welding or ultrasonic food cutting. A good sonotrode design and coordination of the same to the transducer saves energy and guarantees a good result. The sonotrode’s operational deflection shapes can be determined directly and compared with the simulations using scanning laser Doppler vibrometers, thereby enabling reliable implementation of optimum efficiency levels. Even during the welding process, LDVs are capable of measuring the vibration amplitude right at the tool-workpiece contact, which not only gives you important information in the development phase, but also when deviations arise in the production process.
Ultrasonic laser testing
In addition to plastics technology, ultrasonics also enables metal ultrasonic welding or the joining of different materials, such as metal and fiber-reinforced plastics (CFRP). Wire bonding – which is fairly widespread in microelectronics contacting – is yet another application. Also, the determination of the relative velocity and displacement amplitudes by performing a differential measurement, which is necessary for forming a highly stress-resistant joint is a popular application. Last but not least, laser vibration testing allows reliable calculation of the vibration amplitudes under operating conditions – excellent for assessing the ultrasonic welding process.
Experimental modal analysis on sonotrodes for ultrasonic bonding
Related products
PSV-500 Scanning Vibrometer
The PSV Scanning Vibrometer measures vibrations on an entire surface in a non-contact and laser precise way. Its visible HeNe laser provides outstanding SNR on well-reflecting sample surfaces and is ideal for small samples and under water. This flexible measurement platform allows researchers and developers to master the most challenging vibration measurement tasks with ease – from DC to 25 MHz. Detect and visualize operational deflection shapes and Eigenmodes with this cutting-edge laser Doppler vibrometer. Upgrade or expand it to a full 3D system once your application-specific demands grow.
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.
Further applications in acoustics and ultrasonics
- Loudspeakers and musical instruments
![Acoustics testing - deflection shape of a speaker membrane]( "Acoustics testing - deflection shape of a speaker membrane")
Acoustics testing - deflection shape of a speaker membrane - Medical ultrasonic devices
![Ultrasound device testing with vibrometers]( "Ultrasound device testing with vibrometers")
Ultrasound device testing with vibrometers - Ultrasonic imaging
![Ultrasonic transducer deflection shape measurement]( "Ultrasonic transducer deflection shape measurement")
Ultrasonic transducer deflection shape measurement - Ultrasonic actuators
Acoustics measurement, analyzing deflection shapes of an ultrasonic actuator
