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Physics Toolbox Sensor Suite

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Richard Datwyler

on 2 March 2017

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Transcript of Physics Toolbox Sensor Suite

Physics Toolbox Sensor Suite
Download this free app for your smart phone
Both android and apple have this app. The android one is better but the apple works just fine.
The apple app, only has 3 tools, we will use the g-force tool exclusively. If you are using the android you can use this same tool, but will have more options.

Most important will be the total shown here in white.
The settings allow you to change the frequency it records data. 50Hz is fine
The 'Go' button turns into a hand for 'stop' and you will use this to record data. While it is recording you won't see the data, but it will show up when you push stop.
The trash button is most important. Each data run overwrites the previous, so if the first is 10 seconds worth, and the second is 7 seconds, and you exported the second, you would have 7 seconds of new data and then 3 seconds of old. ALWAYS push delete before you run a measurement a second time.
Export button allows you to email the data to yourself.
Play around with this for a bit, see if you can make gravity (which should register as 1 in the total - as you sit still) be + and - for all three directions.
Also see if you can get it equal in all three directions
My negatives where closer.
The data

Email the data to yourself and then open in Excel.
note the X Y Z components are first,
Total will be in column D
Time in E
Date last
Making the data useful.
Insert two columns to the right of A.
Title both of them Step
In cell A2 type 1
in cell A3 type = A2+1
Copy the cell A3 and paste it in the rest of the column for all the data. Easiest way is to double click on the little square in the bottom right corner.
This will make an ascending list of numbers.
Right click on 'B' column header and 'Paste Values'
Right click on the 'A' column header and copy.
Then Delete Column A
1st Get the time right, the data came in backwards
Select all by clicking the triangle in the corner
Under the Options in the tool bar select 'DATA' and then 'Sort'

A drop down comes up, select your data has headers, and choose the step column and largest to smallest.
When done, your data is now in order of ascending time.
Making data useful
Now we need to fix the start time
Insert a column to the left of "G" the time interval
and label it TIME
In cell F2 type in 0 (zero)
In cell F3 type in =G3-$G$2
As before, copy cell F3 for the whole column by double clicking the square in the lower right corner.
As before right click on Column F header and copy,
then right click on Column A header and "paste values"
Finally delete columns F-H the "time", "time interval" and "Date"
Adding a graph
Select the column headers of all your data (usually A-E)
Select 'Insert' in the tool bar and then 'Chart'
Make sure you choose the chart type 'Scatter XY'
Making Data Useful
Finally let us scale the acceleration.
In Cell F1 type Total Acceleration
In Cell F2 type =E2*9.8
This will give us a value in m/s .
So copy this to the whole data by double clicking the small square in the bottom right corner.
Under Chart tools design you can choose 'select data'
This will let you edit what you are graphing
you can select a series and edit it, or remove it.
Here I only selected the Total Acceleration.
Here is the final result!!
There is more data analysis we can do in excel, But this is a good starting point.
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