Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


vibration sensor

vibration sensor

vibration sensor

sir i have 4-20ma vibraton sensor and i converted that current op into voltage(0-10v).and i give that op value into iot device advantech wise 4012e.it shows voltage output i want to convert that voltage into velocity(mm/s).give me some therotical equations and formula.my sensor sensitivity is 100mv/g.

RE: vibration sensor


x(t) = A sin ωt


v(t) = ωA cos ωt
a(t) = -ω2A sin ωt

This all is very basic mechanical vibrations. Do you have a mechanical engineer on your site who can help you? Mechanical resonance is not equivalent to resonating RLS circuits. I don't care what they taught you in college.

Do you understand what your gauge actually is reading? I am guessing it is acceleration.


RE: vibration sensor

It would be a whole lot easier to get a transducer that gives you velocity. For an acceleration output you have to integrate somewhere to get velocity.

RE: vibration sensor

"4-20ma vibraton sensor."

It sounds like its output may be based on an "overall" reading. If so, the frequency information is lost forever.

RE: vibration sensor

Drawoh.  Integrating? sad

RE: vibration sensor

HI IRstuff,

As I read it, the raw signal out is an option with an actual 3rd electrical connection, in addition to a 4-2- mA output.

All the 4-20 mA outputs are a version of "overall" reading.
Peak Velocity (Low Frequency) - 180 to 60k cpm (3 to 1000 Hz)
RMS Velocity - 600 to 60k cpm (10 to 1000 Hz)
RMS Acceleration - 3 to 1000 Hz) / 180 to 300k cpm 180 to 600k cpm (3 to 10k Hz)

Without detailed amplitude vs frequency information ( FFT) before being turned into an overall, I don't think there is much hope of converting acceleration into velocity, etc and etc.

RE: vibration sensor

Perhaps the OP (Sathish28) can identify exactly what vibration sensor he/she has. While it is possible to convert 4-20 m-amp current output to 0-10V voltage output, the original sensor units are maintained, but no integration. No help without more information.


RE: vibration sensor

Quote (Denial)

Drawoh. Integrating?

Oops! Differentiating. smile


Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper – Data Security and Know-How Protection
Our data is constantly exposed to the danger of being intercepted or stolen as it wends its way over global data networks. Data security measures and measures for protecting intellectual property should not, however, first be implemented when data is exchanged – companies must lay the foundation for these measures within their own organization. Download Now
White Paper – Collaboration in the PLM Context
The influence exerted by the Internet of Things (IoT) means that there is a steadily growing need for collaboration in industry. Partners from new industries and areas of application need to be integrated in cross-company business processes to ensure that the lifecycle of smart, connected products can be managed from end to end. Download Now
White Paper – The Challenges of PLM Collaboration
There is cross-company collaboration - and then there is cross-company collaboration. Large-scale corporations and joint ventures need different mechanisms to protect intellectual property from those required for communication between different company locations with heterogeneous IT landscapes. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close