speed of the vehicle by the encoder reading

Goodmorning Labiview users,

I need to get an encoder in an electric vehicle speed information. Is a quadrature encoder (64 pulse) with two signals: A and B (and obviously gnd). My equipment is:

-Compact Rio ni9024

-module NI 9401 (FPGA)

I couldn't find an example for my situation,

I'll be you grateful if you help me. Thanks, has soon.

In 2012, LabVIEW, it is an example for a decoder in Quadrature with the Position and the speed on a CRIO. I have attached a screenshot incase you don't have access to it.

The example uses an index entry, however if you use it you can connect this output to a value constant false and the code will work fine.

Each clock cycle, the FPGA read quadrature inputs. If there is a change, it will calculate the direction (based on the latest values on entries) and either increment or decrement the position. He will also check the number of cycles of the FPGA to calculate how many ticks are passing between the counties of the encoder. You can then read these indicators in your RTW program.

You will need to configure your project accordingly so that the entries of encoders are mapped on the pins of your device. This VI should give you a great jumpstart on the problem.

Tags: NI Hardware

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