×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Measurement of time delay between the out puts of two opto sensors.

Measurement of time delay between the out puts of two opto sensors.

Measurement of time delay between the out puts of two opto sensors.

(OP)
Hello.
I'm looking for some help in determining the type of circuit I shoould use in measuring the time delay between the output of two opto sensors at differant times. I'm thinking of using a laching circuit. The output of the first opto sensor would be connected to the clk of a flip flop and the output of that flip flop would be connected to the clk of another flip flop. Now I can't think of what to do next. Please help.

RE: Measurement of time delay between the out puts of two opto sensors.

How about having one signal start a counter, and the other signal stop the counter....

RE: Measurement of time delay between the out puts of two opto sensors.

How much time do you expect to elapse between the two events (one opto sensor gives an output, THEN the other sensor gives an output)?

RE: Measurement of time delay between the out puts of two opto sensors.

(OP)
Thank you melon, I think I could take it from here. I greatly appreciate your help.

RE: Measurement of time delay between the out puts of two opto sensors.

That's why melone makes the big bucks.

RE: Measurement of time delay between the out puts of two opto sensors.

Very astute observation peebee!
The guy is good!

RE: Measurement of time delay between the out puts of two opto sensors.

or, rather than counting a clock, charge a cap, then read accumulated charge.

RE: Measurement of time delay between the out puts of two opto sensors.

All of these techniques are pretty dependent on knowing what kind of delay we're measuring.  Is that picoseconds or kilocenturies?

And of course what kind of accuracy is required.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources