using labview for tire pressure monitoring system (TPMS)

[kla8789]

Hello my name is Joe.  I'm an Electrical Engineering Technology (EET) major.  Me and my partner want to do a project for our Instrumentation Design II class which is LabView based.  We want to do something with a tire pressure monitoring system and interface it with LabView but we are unsure of exactly what we could do and how we would go about doing it.  We are thinking of using a small trailer tire for installing the sensor as we are going to be doing this in a laboratory and this would be easiest to unmount/mount, take up less space, etc.  We have found some sensors available on the internet and they all seem to be battery powered and transmit the data wirelessly via RF frequency of either 315MHz or 433 MHz.  We're trying to figure out what we will need to receive the data from these sensors and how to acquire the data into LabView and what we could do from there, maybe even a fleet application.  If anyone has any ideas, advice, or can help in any way please let me know.  Thanks

[Hillman]

Hi kla8789,

Thanks for the post!

This is an interesting issue.

My thoughts are you could use some sort of antena/AI DAQ module on the real cheap. Im not sure what sort of results you would get. 

However, normal RF measurements are performed using PXI/RF kit. Here is a good source to read:

RF and Communications Fundamentals

 http://zone.ni.com/devzone/cda/tut/p/id/3992

The module you would need would be something like this:

NI PXI-5661

http://sine.ni.com/nips/cds/view/p/lang/en/nid/203038

You would also need a toolkit for labVIEW,

NI Modulation Toolkit

http://sine.ni.com/nips/cds/view/p/lang/en/nid/12855

This has been done before with schrader - successfully. Its a big project and we would like to help you be successful. I would honestly recommend phoning your local NI branch, UK:

THIS IS ONLY FOR THIS CUSTOMER!

Tel: 01635 523545

Ask for: James Hillman (Applications Engineer)

Let me know if I can help,

Kind Regards

[hari91]

hi.

i have a doubt on a project which i am currently working on for my masters project

i need to interface labVIEW and vector cannoe for some purposes

like i have a data in cannoe via CAN bus and i want it to be acquired by labVIEW without manual presence. i.e automated.

whats the possiblity of doing it?

how can it be acheived

please help

[Stuart.Parkinson]

Hi Joe,

If you have found an off-the-shelf transmitter for your pressure you will certainly be able to find an off-the-shelf receiver for it - much simpler than trying to receive and demodulate the RF signal yourself with expensive PXI stuff. That should leave you with a simple baseband signal that can be easily acquired.

You've not given any details of hardware (neither your pressure transmitters nor the system you will be running your labview code on). I'm guessing that for a mobile application like this you will want to use something as small and cheap as possible like a single board RIO - do  you have anything in mind?

Also, what functionality are you planning to implement, and what kind of display do you envisage? If all you want is a 'low pressure' warning light then labview is perhaps overkill - receiver-demodulator-comparator-led should do it - $20 of hardware. Maybe you want it to log data, transmit the logs to a server over GSM, etc. all of which will affect your hardware choices. Food for thought.

Regards,

Stu.