measuring distance using quadrature encoder

[Involver]

I am currently doing a project that requires the positioning and characterization of TV signals. As such, the position of the TV receiver is one  important variable that i have to measure. I am required to automate the measurements and data logging using a PC/notebook. I have purchased a 2-channel HEDS-9000 quadrature encoder with 2000 CPR & the HEDS6120 codewheel - both from Avago Tech, to be interfaced with the notebook/PC. My idea is to get a TTL-to-RS232-to-USB converter to interface with the PC, so that i can feed the output from the encoder to the PC. However, i dun have much idea on how I can use LabView to interface the encoder and the PC. Can anyone offer some valuable advice?

Btw, the encoder module consists of 5 pins - Vcc, GND, CH.A, CH.B, with one pin not used.

Thanks !!

[Jochen]

Hi,

I think one of the best and reliable options that should meet your needs is a bus-powered USB-M-Series device like the USB-6210.
The USB-6210 is a multifunction data acquisition device with 16 analog inputs, 4 digital inputs, 4 digital outputs and 2 counters. Each of the counters can interface directly to the quadrature encoder signals of your HEDS-9000.

It's very easy to use this device with the NI-DAQmx API for position measurements in LabVIEW. In fact there are some shipping examples that you can use for getting started.

I hope this helps,

Jochen Klier
National Instruments Germany

Message Edited by Jochen on 02-09-2007 09:18 AM