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OLi

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Reply with quote  #31 
It will shortly be on the web we didn't finish it on time today. It is a piezo shear accel. I didn't find so much info on the IMI last time I searched but it maybe changed now so that can be possible. It seems to be a similar solution but maybe not identical so it should be possible but not directly.
We have a synch 2 ch solution with different amplification to have good dynamics.

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OLi

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Reply with quote  #32 
We will test the 333D01 shortly that is the PCB branded version but looks to be the same.
ME-Droid now have a web page http://www.vtab.se/products/me-droid/?lang=en
http://www.vtab.se/products/me-droid/?lang=en


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Curran919

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Reply with quote  #33 
Oli, I had some questions from my colleague:
Is the processing done in the phone or the sensor?
Is the hardware technically capable of displaying spectra or at least 'highest-peak' frequency?
OLi

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Reply with quote  #34 

In the phone. No the sensor only provide the raw data, in digital form but still only a stream of raw data. In the Android we already do a FFT to then calculate the parameters so next upgrade
will include a peaklist but it is in the Android.
So you need to add a device with a processor to do the calculation, there are small platforms that run Linux and can do that but it will be a thing of twice the diameter maybe if you still like to
have the peaklist output on the USB to some other receiving thing.

But you could send the peaklist or FFT by Bluetooth from the phone to something else but it is still a couple of steps. 


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Curran919

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Reply with quote  #35 
Quote:
Originally Posted by OLi

In the phone. No the sensor only provide the raw data, in digital form but still only a stream of raw data. In the Android we already do a FFT to then calculate the parameters so next upgrade
will include a peaklist but it is in the Android.
So you need to add a device with a processor to do the calculation, there are small platforms that run Linux and can do that but it will be a thing of twice the diameter maybe if you still like to
have the peaklist output on the USB to some other receiving thing.

But you could send the peaklist or FFT by Bluetooth from the phone to something else but it is still a couple of steps. 



Ah yeah, I much prefer the analysis going on in the phone. I thought maybe the sensor was just sending the overall value, but transmitting the waveform is ideal, IMHO. I must say, the utility for me would increase 10x once I can see the spectrum!
OLi

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Reply with quote  #36 
It is already there but you have to look inside.. [rolleyes]
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Good Vibrations since early 1950's, first patented vibrometer 1956 in the US.
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OLi

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Reply with quote  #37 
We are now working on connecting sensor 333D01 that is just another tag on the same thing from IMI/PCB and it seems to be some progress so there can be a version for that sensor also.
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