problem with acceleration amplitude in IIS2DH
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‎2020-02-07 12:39 AM
Hello
We tested the IIS2DH sensor on a shaker.
Accelerometer Settings:
- ODR = 5376
- Full-scale = +/- 16g
- Low-power mode.
- High-pass filter bypassed
Shaker Settings:
- frequency 1 kHz
- acceleration amplitude 13.592 g
As a result, the accelerometer registered an acceleration amplitude of 2 g less than the real one.
What could be the problem? we wanted to repeat the result of the experiment presented at https://www.st.com/content/ccc/resource/technical/document/white_paper/group0/c0/30/46/2f/00/24/42/1c/Capacitive_MEMS_accelerometer_for_condition_monitoring/files/MEMS_Condition_monitoring.pdf/jcr:content/translations/en.MEMS_Condition_monitoring.pdf
experimental data example:
raw acceleration(g)
-14336 -10.18997505
-10752 -7.384129908
7424 6.845513329
12800 11.05428105
1536 2.23591059
-12544 -8.787052481
-15360 -10.9916451
1792 2.436328101
11008 9.651358475
9216 8.248435902
-9216 -6.181624846
-15360 -10.9916451
-6656 -4.177449742
9216 8.248435902
12544 10.85386354
-3072 -1.371604597
-13568 -9.588722522
-13568 -9.588722522
5120 5.041755736
12032 10.45302852
5376 5.242173246
-11264 -7.784964929
-15872 -11.39248012
-2048 -0.569934555
10240 9.050105943
11520 10.0521935
-6656 -4.177449742
-14592 -10.39039256
-10240 -6.983294887
7680 7.04593084
12800 11.05428105
768 1.634658059
-12800 -8.987469991
-15360 -10.9916451
2304 2.837163121
11008 9.651358475
8704 7.847600881
-9728 -6.582459867
-15616 -11.19206261
- Labels:
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Accelerometers
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‎2020-02-26 1:44 AM
Hi @ESmir.1​ , I'm wondering if there could be some kind of (unwanted) mechanical low pass filter on the setup... Did you tested 100Hz and 500Hz frequencies too (as in the white paper you reported)? Do you process data in terms of rms /peak value, FFT, or else? Regards
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‎2020-03-24 9:24 AM
Thanks for the answer, the problems were in our shaker. It has a problem with resonance just at this frequency
