Contact US

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!

*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

Electronic Distance Measurement

Electronic Distance Measurement

Electronic Distance Measurement

Hi, I'm a newbie to engineering and wondered if anyone new of a hand held electronic distance measuring device. The device would need to measure up to 500 meters and may possibly need to operate on multiple frequencies. The idea would be that there would be a target that I need to measure the distance from, but there might be multiple such targets in the surrounding area (hence the need for multiple frequencies). The target would listen for a particular frequency and then return a signal to the hand held device for the distance to be calculated. Does anyone know of such a device on the market at the moment or how best to implement?

Many thanks,


RE: Electronic Distance Measurement

What is this preoccupation with radar?  

Use a laser rangefinder; they're cheaper, have extremely tight beams and have more than adequate range resolution.


RE: Electronic Distance Measurement

         Just ran across your post. I have a similar need and was wondering if you had any luck?
BTW, would your targets be stationary or mobile?


RE: Electronic Distance Measurement

Yes there are systems that will do this.

RE: Electronic Distance Measurement

         Could you share some info/links on some systems that you are speaking of?

RE: Electronic Distance Measurement

Max distance is 500m. What is the min and accuracy?
Max measurement time?

<nbucska@pc33peripherals.com> omit 33 Use subj: ENG-TIPS
Plesae read FAQ240-1032

RE: Electronic Distance Measurement

Accurate time delay (distance) measurement by radio is best done using a transmitter modulated by a maximal length pseudo random sequence.  This is not too difficult and is the same technique as used by GPS.  A 10 bit sequence at a 5MHz chip rate can be correlated to better than 1m and down to a few mm if you get serious about it.

Perhaps GPS would do your job.

RE: Electronic Distance Measurement

No, but I can sell you a system.

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! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close