Quadrature Encoder Velocity and Acceleration with LabVIEW FPGA

This example program demonstrates how to estimate velocity and acceleration of a Quadrature Encoder by using LabVIEW FPGA and CompactRIO. The example consists of an FPGA VI, Encoder Position & Velocity (FPGA).vi, which will run on the FPGA platform and a host VI, Encoder Position & Velocity (Host).vi, which will run on the Host Machine. The example program was designed for a PXI-7811R FPGA and an R-Series expansion chassis with a cRIO-9411 DI module in slot 1. The vi can easily be modified to run on any other cRIO FPGA platform. For details about the functionality of this program refer to the tutorial "Quadrature Encoder Velocity and Acceleration Estimation with CompactRIO and LabVIEW FPGA".

Related Links:

Getting Results with CompactRIO and LabVIEW Application Note: Quadrature Encoder Velocity and Acceleration Estimation with CompactRIO and LabVIEW FPGA

Requirements

Filename: quadencoder8.x.zip

Software Requirements

Application Software: LabVIEW Professional Development System 8.0
Toolkits and Add-Ons: LabVIEW FPGA Module 8.0
Language(s): LabVIEW

Hardware Requirements

Hardware Group: CompactRIO, Real-Time (RT), Reconfigurable I/O (RIO)
Hardware Model: NI 9411, PXI-7811R
Driver: NI-RIO 2.0

Filename: quadencoder.zip

Software Requirements

Application Software: LabVIEW Professional Development System 7.1
Toolkits and Add-Ons: LabVIEW Real-Time Module 7.1, LabVIEW FPGA Module 1.1

Hardware Requirements

Hardware Group: CompactRIO, Reconfigurable I/O (RIO)
Driver: NI-RIO 1.0.3

Reader Comments | Submit a comment »

poor resolution
I tried out the example code with a 60 count (240 ppr) encoder and the resolution of the RPM readings was very limited.
- Ryan Vallieu, Data Science Automation, Inc.. rwv@dsautomation.com - Sep 3, 2008