Belt Weighing Technology
I think you have a very interesting project.
I have personally designed and built a belt weighing system which we have been able to promote sucessfully to major mining companies for over 20 years. We have trade certification for our system in Australia, Canada, USA and the EU.
You have asked about loadcell signal acquisition. Most systems these days use a fully integrating ADC system. We like many others use a Sigma Delta converter. These units are fully integrating, ie even though you get a new number at say 60Hz, each number represents the true average of the weight since the last number. We dont use the AD7712 any more, but you could look up the data sheet to get an idea.
But, weigh frame design is where the accuracy of the system lives and dies. We have thought a lot about this. We could correspond some more privately about this if you wanted.
L. Ian Burrell
( +(61) 2 9584 2566 Mobile +(61) 419 292 604 Ê +(61) 2 9584 8080
+ PO Box 249 Mortdale NSW, Mortdale NSW 2223, Australia
Unit 9, 41-45 Lorraine St, Peakhurst NSW 2210, Australia