200 kg buttonn load cells work with matlab?

[tim5347]

Hi everyone,

I am working on a center of mass device this summer to track a persons weight, and was wondering if using 3 of the 200 kg button load cell would work along with a Phidgets Wheatstone Bridge Sensor Interface for what I am trying to accomplish? I am also wondering if matlab is compatible with both of these devices? Any information would be greatly appreciated.

Have a great day,
Tim

[cbenson]

The button cell itself cannot be used directly with Matlab; you need an interface such as the one you described. The Phidgets Wheatstone Bridge Sensor Interface does have sample code for Maltlab, which sounds perfect for your application, so you’re all set.

[tim5347]

Thank you very much CBenson for the info and clearing it up for me

[jmm694]

Instead of using the Sensor Interface, would there be a simple way to interface the button sensors to a NI-DAQ box to read the output voltages directly? i.e. can I supply 5VDC to the load cells and read out the voltage directly or will it be far too small and need amplification. If so, can I just amplify the signal and read that output directly?

– Joe

[cbenson]

If you have an NI-DAQ box, that’s essentially an interface. We don’t sell / support that product, so you’ll need to read through the specs to know if it will work with that sensor.

[tokke93]

Dear

You mentioned about a sample code in Matlab for the 1046_0 - PhidgetBridge 4-Input bridge.
I searched for this on your site and never found a sample code in Matlab.
Is their one? Can you maybe post the URL?

Greetings
Tom

[cbenson]

phidgets.com/docs/Language_-_MATLAB
phidgets.com/downloads/examples/Matlab.zip

Hope this helps.

[tokke93]

Dear

I have gone through all the examples for matlab, but never seen an example for the bridge. Is their one? Also the library for Mac isn’T available, is this correct?

Thanks in advance

[cbenson]

We do apologize - upon further research this is one of a very small number of products where Phidgets has not released MATLAB code. They have almost everything else. We have contacted them to know why the code has not been created or released and will get back to you here as soon as possible. Once again, we do apologize and will get back to you shortly.

[cbenson]

Phidgets:

Unfortunately we don’t have examples for all devices for Matlab and a few other languages because it only represents a small fraction of the customer base.
For those who are well-versed enough that they prefer the project is in Matlab, it shouldn’t be too hard for them to look at our existing code samples and the Matlab API to get devices like the PhidgetBridge working.
You can find the Matlab API *here phidgets.com/documentation/web/cdoc/index.html
*Go to Modules -> Specific Phidgets -> Phidget Bridge.
From there they can find all of the functions they need to read the bridge value, set gain, or set up an event handler.
To see how these functions are called, they can take a look at the existing code samples for other devices.

[tokke93]

Okay, thank you very much for the information!
I will check what I can do with that!

Tom