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An experiment
Experiment 1
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Experiment 2
The experiment (f2)
my result
Experiment 2a elevator
datasheets - on way
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The plot

  1. Use the AAUIMUKIT to collect data from an experiment.

    1. a trip in the lift from top floor to cellar

  2. Convert data to engineering units

  3. See if you can estimate the altitude between top and botom of journey

  4. Maybe apply filtering

  5. more on this later l

Try to use accelerometers and pressure sensors to altitude determination.

A std shield based on an Uno.

Data from experiment (LOG00082.TXT)

The Arduino code src/sketchbook/mpu606xbmp285rob3no3/mpu606xbmp285rob3no3.ino

A precollected data set is available

  1. src/data/shield1/LOG00082raw.TXT

    1. 3071 samples

    2. 40 msec aka 25 Hz sampling rate

  2. src/data/shield1/LOG00082.TXT w comments in top

A plot of raw values - hmm bottom plot is altitude calculated from airpressure

 

view large plotall.png

python plotting code: plotallraw.py.txt

See more at https://jensd.dk/doc/sensors/gy80gy87gy88gy91/

AAUIMUSHIELD shield code i2scanner3, data, plots etc look for it below

code, library files data from experiment images etc at …

Src folder list: here

The code for an experiment

The Arduino code does…

  • sampling every 40 msec (25 hz)

    • 100 samples equal 4 seconds sampling

  • sample and save 3 axis acceleration

    • config to +/- 4G (equals -32768 - 32767 in raw format - int16 range)

  • sample and save 3 axis gyro

    • confit to +/- 500 degr/sec (equals -32768 - 32767 in raw format - int16 range)

  • air pres (equals -32768 - 32767 in raw format)sure

  • air pressure converted to altitude

  • air temperature

The code src/sketchbook/mpu606xbmp285rob3no3/mpu606xbmp285rob3no3.ino

The has been tested and one sample takes less than 25 msec with a margin

So …

It has been choosen to go for 40 msec just 2Bsafe

Libraries

You need to have two libraries installed

See src/index.html

the experiment eop

Jens