3 July 2012
Welcome to our latest Test & Measurement Newsletter. Please let us know your views and interests by emailing firstname.lastname@example.org.
In this Issue:
1. Time-Saving Vibration Testing: Multi-Sine Excitation
Newly implemented is multi-sine excitation into our VibControl shaker control systems. This test mode allows you to simultaneously sweep up to 10 sine tones at different levels across the desired frequency range. A typical sweep rate is 1 octave/min. for all sine frequencies. The sine tones are independent from each other and have their own digital tracking filters allowing for precise, fast control. They can be switched on/off individually.
Multi-sine: 10 sine sweeps in parallelMulti-sine excitation is a new technique which has its seeds in the German automotive industry. The objective was to largely reduce the costs and time of durability tests: For example, if you need 100 hours for a standard sine sweep test, the test duration will be reduced to 20 hours with five sine tones performed in parallel.
2. Portable Data Acquisition with the Cube
New from m+p international for portable data acquisition of strain, temperature and vibration signals is the compact and rugged cube I/O chassis together with our Coda (Continuous Data Acquisition) software product family.The Ethernet-based cube I/O chassis from United Electronic Industries is ideally suited for a wide variety of industrial, aerospace and laboratory data acquisition and control applications. The small 3-slot cube only measures 4” x 4.1” x 4”, its “big” brother provides slots for 6 I/O boards and is 5.8” high. For larger applications compact, rugged I/O racks are available.
3. Noise Testing of Wind Turbines as per IEC Standard 61400-11
Noise is an important factor in the development and deployment of wind turbines. Korea Institute of Energy Research purchased m+p international’s SO Analyzer for measuring and analyzing the noise produced by the wind turbine power generators at its test site in Gangwon province, South Korea. Testing is fully compliant with IEC Standard 61400-11 second edition.
Wind turbines of Korea Institute of Energy Research, South KoreaAcoustic measurements include:
• A-weighted sound power level
Cooper Tire & Vehicle Test Center in Pearsall, Texas operate m+p international’s pass-by noise testing system on different test tracks. The system allows efficient, accurate and repeatable tire noise testing, but also supports vehicle testing. Thanks to its flexibility and portability the pass-by- noise system is ready for test within minutes – managed by a single operator.
The tests meet the requirements of ISO 13325 along with providing the latest updates to ISO 362.Download the Article
Well, that brings to a close this edition of the m+p international Newsletter. If there are items of info you would like to see here or if you have useful tips for the rest of the environmental test world, then please send us your pointers and we'll include them in the next edition.
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