how to measure 12000h to 18000 hz frequency of vibrating wire transduser

[nicksgoldsmith]

here i have attached pdf file for strain monitor typ kl66 module(the product of digi sense)
plz find attachements for this,and sir, in the technical specificartion of this transducer they have written that ,signal 12000-18000 hz (5v ttl)
so...my question is how could i measure and calibrate this o/p frequency with using frequency counter
and the measure problem i found that this o/p frequency range is too much for conditioning.
and is it convenient to convert this o/p in voltage by using frequency to voltage converter ?and then calibrate the voltage for load?
again the problem is i didn't found the simple circuit for conversion of f to v for high frequency means--(to convert 12000-18000hz in to the voltage)
(*we r using this transducer for load measurement in elevator)
so...plz give me exact and total solution and if possible give me the simple circuit solution .
thank you,
Regards,
Nikhil.

 

[Borber]

Frequency of vibrating or rotating mechanic devices is measured with stroboscope. Stroboscope schematics can be found by Google.

 

[BradtheRad]

i didn't found the simple circuit for conversion of f to v for high frequency means--(to convert 12000-18000hz in to the voltage)

Here is a simple F-to-V converter.

The signal goes through a high-pass filter, then a peak detector.

Component values were chosen for the range 1k to 20k Hz.

To calibrate it, you'll still need an oscilloscope or frequency counter.

By turning the potentiometer, you can adjust response.
If you dial the potentiometer to less resistance, you attenuate the signal, but you obtain better linear response at the upper frequencies.

 

[D.A.(Tony)Stewart]

If the transducer already outputs a 1shot fixed pulse width, it is directly readable with DMM using v+/PW as the full scale Rev/sec. Otherwise use the signal out to create a 1shot on each rising or falling edge. 50us gives you 20kHz at full scale 5V. Calibration adjusting PW with a trimpot is required for <1% accuracy. Many dual one shots on the market.