What vibration sensor for bearing monitoring

[screwball]

Hi,
I am looking for a vibration sensor which would be suitable for monitoring bearing condition, the only sensors I can see are listed as tilt sensors or switch on shock, any pointers in the right direction?
Thanks,

 

[kellys_eye]

AFAIK they use piezo transducers and monitor the frequency of the signal to detect vibrations.

 

[Externet]

Use any automotive knock sensor, which is nothing else than a sturdier-mounted microphone and available as car parts.

----> https://duckduckgo.com/?q=knock+sensor&t=canonical&ia=web

----> http://www.denlorstools.com/home/dt...ve_noise_detection_tools_and_sound_meter.html

----> http://www.skf.com/binary/49-267858/CM-P1-11604-14-EN-Vibration-Sensor-Catalog.pdf

 

[hevans1944]

Single-axis accelerometers are what we used in our bearing test rigs. Bearing failure, indicated by a sudden increase in vibration amplitude, initiated shutdown of test rig. Most vibration accelerometers use a "proof" mass attached to a piezoelectric crystal to form an accelerometer transducer with excellent high-frequency response. More recent variants use MEMS (Micro-Electro-Mechanical Systems) technology, but the principles are the same: measure the motion of a test or "proof" mass with some sort of position transducer.

Here is a pretty good introduction from a company that has been in the instrumentation and data acquisition business a long time. You might also want to check out the links on this Google search results page.

 

[OBW0549]

If you simply Google the phrase, "vibration sensor for bearing monitoring" you'll get all kinds of good info. Bearing condition monitoring is a well-established science/art, and so are the devices and methods for doing it.

 

[Externet]

Sorry, by some mental fart linked the first wrongly...

----> https://duckduckgo.com/?q=knock+sensor&t=canonical&iax=images&ia=images

 

[hevans1944]

Sorry, by some mental fart linked the first wrongly...

----> https://duckduckgo.com/?q=knock+sensor&t=canonical&iax=images&ia=images

That's okay. I liked your post because of the third link to the Vibration Sensor Catalog. That seemed most relevant to bearing failure testing and a pointer in the right direction, as requested by the OP.