Acoustic testing with a laser vibrometer on electric motors
Choosing the right sensors is essential for ensuring that the acoustic testing technology can be used as an objective testing technology in serial operation. In practice, all of the standard accelerometers (body-borne noise) and contactless sensors (air-borne sound microphones) that are available on the market are suitable here.
Measurements on difficult-to-access test components
A new feature of the SonicTC acoustic testing system is the integration of the control for the laser vibrometer by Polytec, based in Waldbronn. In recent years, the use of laser vibrometers as an additional option for contactless sensor technology for recording vibrations has established itself in test engineering. One of their intended uses is to take measurements on difficult-to-access test components and/or in test environments with high levels of background noise.
The laser vibrometer can, according to the company, be installed with the testing system quickly, simply and directly as a measurement sensor for the testing system. For example, the interface for a one-dimensional laser-scanning Doppler vibrometer IVS-500 is parameterised via a selection field, meaning that it is then immediately operational.
Scalable testing system for one or multiple test benches
The testing system is characterised by its scalability from one or multiple fully/semi-automated test benches. With the 2.1 release, the graphical, open programming supports the implementation of application-specific interfaces for single-user systems or fully automatic test benches in series production. The test stands can be operated simultaneously either in series or in parallel. The more complex the task is in terms of tests, measurement parameters and their correlation, the more apparent the strengths of SonicTC become.
The testing system is equipped with various communications solutions for higher-level systems, thereby ensuring the exchange of data in production lines and testing systems.
Thanks to its versatile analysis methods/evaluation methods/algorithms, the testing system can also be used in laboratories to evaluate measurement results. The procedures range from signal preparation to analysis of time and frequency ranges.