Human Electric Trike Thesis

Design of an electrically assisted human powered trike

Data acquisition system

Posted by Bob Dold on Thursday, September 28, 2006 12:11 PM

In order to evaluate the performance of the completed trike I plan on putting together some instrumantation to measure it’s performance. Variables I would like to log are the following:

 Speed

Time

Grade

Motor Amps

From these I can compare the actual performance to the predicted performance calculations I have made. To recored the data Dr. K.J pointed me to this $109 USB DA board: http://www.measurementcomputing.com/cbicatalog/cbiproduct_new.asp?dept_id=412&pf_id=1535&mscssid=JCM5JCEEDRK38KSPRT8QX1R3D4TK5GC7

pmd-1208lssmall.gif

This will plug into a laptop and allow recording of up to 8 analog inputs – currently I will need only three:

speed – optical sensor

grade – inclinometer

amps – measure voltage with shunt

The time can be tracked within the DA module, it is possible I could use additional inputs for TC’s or strain gages.

Here are some links to different inclinometers:

http://www.riekerinc.com/ElectronicInclinometers.htm

http://www.cfxtech.com/

http://www.usdigital.com/products/incremental-inclinometers.shtml

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