Find suitable SI units to work with a Vibration Sensor

AI Thread Summary
The discussion focuses on using a wireless vibration sensor for an IoT project involving a CNC machine, with output values measured in 'g', which represents acceleration due to gravity. Participants suggest that to convert these values into a suitable SI unit, one can multiply by the standard gravitational acceleration (9.8 m/s²). They emphasize that vibration levels are frequency-dependent and recommend expressing them in units like m/sqrt(Hz) or m²/Hz for better analysis. The conversation also touches on the importance of understanding the RMS, MAX, and MIN acceleration values provided by the sensor. Overall, the thread highlights the need for clarity on vibration measurement and its application in the project.
Robbie64
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We are working on an IOT project in which we are trying to learn about different vibrations of using Wireless Vibration Sensor
According to the manual, the wireless vibration sensor is giving the output while testing on CNC machine device

0.75, 0.71,0.69 whose SI units are in 'g'(which is acceleration due to gravity according to me ) but I am not aware of suitable SI units which will be useful to make it work with CNC machines.

Any suggestions on this will be a great help.
 
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fraction of g is unit system independent. You can put it in a unit system by multiplying by a unit system's value for g, such as 9.8m/s^2.

As for how to make it useful - that is a matter of what you (or the machine) want to use it for.
 
There is typically no single "Vibration level" since you will always have a spectrum where the level is strongly frequency dependent.
You can of course talk about the maximum vibration level throughout some frequency range (say 0.1-100 Hz) ; and this then typically given in units of m/sqrt(Hz) (meters per square root Hertz); orr alternatively m2/Hz (same thing squared) .
A typical level for a low(ish) vibration system would be of the order of 1e-6 m/sqrt(Hz)
 
+1 to what Russ said.

The manual also says "Industrial Grade 3-axis Vibration Sensor with RMS, MAX and MIN acceleration in g". Are those the three figures you quoted 0.75, 0.72, 0.69?
 
Robbie64 said:
We are working on an IOT project
I'm curious. Is cybersecurity a priority for your project?
 
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Hello @CWatters
This value is RMS value only I 'll check with above-shared formulae also to get the desired values
 
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