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convert voltage to acceleration

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convert voltage to acceleration

Postby jchow » Mon Apr 09, 2012 4:59 pm

hi ,

may i know how to convert voltage to acceleration ? i using picoscope 3000 series and accelerometer with sensitivity 9.9 mv/g . i really need help
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Re: convert voltage to acceleration

Postby aarne » Tue Apr 10, 2012 10:41 am

9.9mV = 1G
-9.9mV = -1G

99mV = 10G
99000000000mV = 10000000000G

What kind of help you need?
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Re: convert voltage to acceleration

Postby jchow » Wed Apr 11, 2012 9:48 am

if my output is 3.3 mv from the screen. then i just divide the sensitivity of accelerometer sensor to get acceleration ??

for example

g= 3.3 mv/ 9.9 mv/g = 0.3333 ??

if that correct ???
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Re: convert voltage to acceleration

Postby Martyn » Wed Apr 11, 2012 10:05 am

Yes :)
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Re: convert voltage to acceleration

Postby Martyn » Wed Apr 11, 2012 10:22 am

If you import the attached probe into the PicoScope software it will do this all for you.
Attachments
Acceleration.psprobe
Acceleration Probe
(1.04 KiB) Downloaded 279 times
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Re: convert voltage to acceleration

Postby jchow » Tue Apr 24, 2012 7:05 am

hi
if i attached the probe inside..

how that tool detect my sensitivity of sensor ?

i use 3 channel with different sensitivity
?
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Re: convert voltage to acceleration

Postby jchow » Tue Apr 24, 2012 7:21 am

is it we picoscope will automatically detect the sensitivity of accelerometer once i attached that acceleration probe ?
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Re: convert voltage to acceleration

Postby Martyn » Tue Apr 24, 2012 11:34 am

The following may prove to be an interesting read for you although it is related to testing Pine not Steel but the principals should be the same
http://www.fwpa.com.au/sites/default/files/PNB040-0708_Research_Report_MOE_MOR.pdf

It uses the following kit

    A Laptop or Desktop
    B Data acquisition card (Pico Technology Type Picoscope 3224)
    C Accelerometer (Brüel & Kjaer Type 4397)
    D Impact hammer (Brüel & Kjaer Type 8206-2)
    E Conditioner (Endevco Type 4416B) for accelerometer and impact hammer
    F Low pass filter to avoid aliasing effect
    G Screw for the accelerometer attachment (magnet system)
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Re: convert voltage to acceleration

Postby jchow » Tue Apr 24, 2012 4:32 pm

hi martyn,

if i divide sensitivity of sensor by voltage AC RMS will get acceleration RMS ??

got any paper or journal to prove ? i really need that . thanks
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Re: convert voltage to acceleration

Postby jchow » Wed Apr 25, 2012 1:06 am

hi martyn ,

do u have any journal or technical paper to show whether need to consider accelerometer sensitivity by using acceleration probe u upload ?
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Re: convert voltage to acceleration

Postby Martyn » Thu Apr 26, 2012 7:15 am

Not sure why you need a paper for this.

An accelerometer will produce a voltage relative to it's acceleration. The manufacturer of the accelerometer will give details of this relationship. All the probe I have produced does is to display the actual acceleration rather than the voltage, it simply does the mathematical conversion for you.
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