Eliminating vibration effects from the output signal of a loadcell?
Eliminating vibration effects from the output signal of a loadcell?
(OP)
As you know loadcells generally work in an environment with lots of mechanical vibration. So the output signal of the loadcell also vibrates very much. Averaging the output slows the output very much. Can we eliminate / filter out this vibration from the output signal wihout a much loss of the response rate? Thanks in advance.





RE: Eliminating vibration effects from the output signal of a loadcell?
We have used a rather crude technique where we look for the local maxima and minima and then create a new signal that is the average of these.
The technique works quite well and has the advantage that it adapts itself to vibration level, is fast (no filter time constant) and is totally transparent when vibrations are non-existant.
It is only when vibration saturates the load cell or its electronics that you have to watch out for false readings. The check for saturation can be easily built into the algorithm.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Eliminating vibration effects from the output signal of a loadcell?
RE: Eliminating vibration effects from the output signal of a loadcell?
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Eliminating vibration effects from the output signal of a loadcell?
The explanation was that the mounting jig reduced non-vertical forces to zero to eliminate the effects of agitator perturbations that typically forces the use of signal averaging that severely damps the response of the weight signal.
I don't know if the same is true for higher frequency vibrations, but if beating the existing vibes with other vibes doesn't work, you might want to call the mechatronics division of Sartorius.