speedometer

[foenti]

hello

I would like to measure a speed on a reedcontact. With arduino Uno. Is there a example how to show speed in a graph?

thanks

[Vans]

Hey foenti,

your project seems very intersting to me. I would be nice to get some more informations.

Do you use the LabVIEW Interface for Arduino?

The right choice of the graph type depends on the data type you get from your arduino. Perhaps you need a convertion comparing to the following link:

https://www.ni.com/docs/en-US/bundle/sound-and-vibration-toolkit-labview-api-ref/page/sound-and-vibr...

I hope to give you some more precise support after receiving your answer.

Kind Regards,

Vanessa

[foenti]

yes, I use LIFA.

a wheel dedect a signal whitch is boolean. Do you have an Idea of count and analyze in a graph?
I think I will need a digital to analog convert.

regards

[Vans]

Hi foenti,

I like to support you but your informations are not sufficient.

In your first post you talk about speed, in the second about boolean data. Whats your aim?

Perhaps anyone of the community has a similar project and can help you.

Kind Regards,

Vanessa

[foenti]

In my project is a contact false or true- if the contact is true-1. A counter will rise up. I want to make a reset to the counter if there is no contact for 2 second.

can you help me?

[Vans]

Hey foenti,

I had a look into your vi. A little bit more documentation would be nice.

The first contact seems to be the boolean element on the front panel, right? Where to find the second contact?

Kind Regards,

Vanessa

[foenti]

a reedcontact on a wheel will measure a close contact. the time between two contacts (close) will give answer about the current speed. In my VI. is still speed on km/h while no contacts follow. I would like to make a reset after the last contact following by two secons contact open.

[Vans]

Hi foenti,

in my opinion your current speed works like expected. Where did you try to integrate the reset after 2s? Reset the time, graph or speed?

Please, initialize your shift register. If you run a VI twice the values are still inside your register. This causes a wrong speed in the first iteration.

At this moment the comparison "time difference > 0?" in front of your second case structure does not make sense. The value will always be >0. Why not implementing ">2000?" in this point?

If you prefer german, you can also add some documentation inside the VI in german.

Kind Regards,

Vanessa