It is about 60 years since my father Gösta Lindholm with a friend developed and patented the first vibrometer of the type we kept working on and enhanced since then. US patent is a few years younger. The generation vibrometers we now work on is like the 8th generation and we still use the same moving coil velocity sensor, now in generation 3. Vibrometer design do have some similarities, the sensor generate a signal w/o power supply and in the first version it was directly driving the moving coil instrument that presented the data and in the newest version the signal is sent in to a Android based unit, currently a Samsung Note. We have for each version added functions that customers requested and we needed ourselves. Functions like bearing condition, filter and analysis tools have been added as technology made it possible.
The new generation ME22Droid http://www.vtab.se/products/vibrometers/me22-droid-vibrometer/?lang=en has besides vibration according to ISO standard, multiple bearing values L and g a peak list and also the possibility to store the data with a note. Information can also be sent using standard Android functions like SMS, Email, Bluetooth etc. Something that didn´t even exist in the imagination of Science Fiction writers 60 years ago. Then you wrote the numbers on paper and sent them with carrier pigeons, almost. It is also possible to play Angry Birds for free but it is not a requirement. If your Android unit is a phone you can also make calls with it but you can still have some practical use of it as a vibrometer. However you have to unplug the sensor when you answer the phone. Development continue and the ME22Droid will be possible to upgrade in several steps in the near future. If you choose to do so. Our aim is to give a possibility for the user to grow with the development of the MEDroid series. Closest to get finished are software enhancements that will give FFT analysis that can be stored, rule based expert analysis etc. ME22Droid level will also be enhanced so if someone like a different ISO standard than the standard 10816-1, large machine, soft foundation it can be done. If Kurtosis, Crest factor is a favourite it can be included, maybe in a “enhanced” mode or version not to clutter the basic and as we hope, easy to read display that is shown when starting. It is my sons Lars and Erik with their friend Caj that develop the software. So technology progress is moving on.