I’m trying to
use a two track optical encoder with three channels (A, B and Z) on each track
to provide measurements of the angular position and speed of rotation of a bicycle
crank. A proximity sensor provides a pulse when the crank arm is in the upright
or 12 o’ clock position. I want the rising pulse of the proximity sensor to
provide a trigger for the angular measurement to begin, and I went the angular
measurement to restart from zero each time the crank passes by the proximity
sensor. I’m planning to use a frequency generator as an external clock for the
sampling rate. I also want to be able to write the speed and angle measurements
to an excel file.
I’m using
Labview 8.5 and I have the following National instruments data acquisition
equipment: NI PCI 6221 and a DAQ chassis containing an NI 9421 card. I have limited experience using Labview and
the National instruments data acquisition equipment so I would greatly appreciate
any help.
