Is it possible to create a GUI displaying foot pressure data?

[amansari]

We are using Labview 8.5 student edition and we have a project where we are monitoring varying pressures on a foot.  We are using 4 flexiforce sensors placed on a foot pressure pad that output voltage and are running these voltages into the 4-channel WLS-9219 DAQ.  What I am wondering is this: 

After browsing the available VI's within labview, is there a way to create a custom one where I display a "foot" on the screen, and as a person applies a force to a  particular sensor (or multiple sensors), this "GUI" shows "redness" area denoting a harder pressure, as well as displaying all the values of the load as it varies?  I am also wondering if there is a way to have Labview interpret a voltage signal (ex. 300mV) as a force (ex. 30 pounds).  Any help or ideas with this is appreciated!!

[johnsold]

You could use an intensity graph for your display.  Past an image of a foot outline over the graph.

Scaling is simply multiplication.  The VI does not really care whether a number is a voltage or a force.  You can also assign units to indicators. 

Lynn 

[Cory_K]

You would just need to read the instruments manual.

It would say something like this:

Pressure output is between 0 lbs and 100 lbs .

The output sent to the computer is between 0- 10mV

So you would read in the voltage, then multiply by 10 to get the pressure. 

[amansari]

Thanks for the tips.  How exactly do you get the Intensity Graph to appear from underneath a picture pasted into the Front Panel? 

Let me tell you exactly what we have and what we're trying to do:

We have sensors that will monitor the load applied to that area of the foot and measure that in volt.  We are using four such sensors and want to create a display in LabView where data is sampled at 5 Hz (and thus refreshes that often).  We are looking to display real-time voltage or force values, a line graph for each sensor (which we have) and then a seperate display of an entire foot.

Say we have 4 sensors placed in 4 different areas, for example, on the heel, ball, sole, and under the big toe.  When a person steps on our sensors, each sensor will read different values.  What we want on the Front Panel is a diagram of a foot and a visual representation of the loads being applied to that location, most likely using a color notation.

I looked into Intensity Graphs, and what I found was that they require a "matrix" of values to represent a grid-like area.  What we are sort of looking for a "circle" to appear around each sensor location on the foot, and the size of the circle will increase/decrease based on the magnitude of the force being applied.  It doesn't have to be a "circle" per se, but a similar effect will do.  Any idea how this can be done?

[Ben]

Two methods come to mind.

1) Use customized color boxes for each pressure point. Set their color and size based on measurement.

2) Use a Picture control to render the readings using circles at the appropriate locations.

Just trying to help,

Ben

[smercurio_fc]

Sounds like an interesting project. You could use a simple Boolean LED as well, and set the Button size accordingly. See attached sample (LV 8.2) for simple demonstration.

Lots of possibilities - depends on how fancy you want to get.