canbus vibration sensor

Hey Everyone

I have a sensor I need to try and source and its not proving easy to find.... I'm working on a 50T Horizontal tree mulching machine. With any machine of this size which has a large rapidly spinning mill vibration can be an issue. If the mill is balanced then the vibration is minor and if it's been damaged or worn out of balance then the vibration can be extreme and destructive.

We have a working solution for balancing these types of Mills that can be called on when needed, but I'm looking to permanently establish a sensor on each of the mill bearings that provides over canbus a single axis vibration reading from which at startup prior to introducing tree material we can determine if the mill is go/nogo. For a balance you need a vibration quantum and an angular measure of unbalance. To determine what I need I really only need the vibration quantum and wouldn't expect to put in an optical sensor from which to measure any angular unbalance from. 'm hoping that there are suitable sensors available that can tell me over J1939 or CanOpen that the vibration is x IPS^2 (or any of the other multitude of measurements that can apply to vibration....my background is aviation hence IPS) 

Anyone seen anything like this?

There are heaps of accelerometers that can provide me with sinusoidal waveforms but that means I have to put in hardware to size the waveform appropriate for the controllers and then make my IQAN controllers interpret the waveform when they are all busy anyway, something I can hopefully offload to a sensor

Andy