Welcome to Laser Pointer Forums! If you are looking for a laser you may want to check out the database of laser pointer companies. The link will open in a new window for your convenience.

 Laser Pointer Forums - Discuss Laser Pointers Detect angle between 2 devices Laser Pointer Company Database     Laser Top Sites List     Lasers by Type     Green Lasers

01-19-2014, 02:38 PM #1
 Junior Member Join Date: Jan 2014 Posts: 9 Rep Power: 0
sbright33
Junior Member

Join Date: Jan 2014
Posts: 9
Rep Power: 0
Detect angle between 2 devices

I'm hoping you experienced Robot and Laser builders can help me with some brainstorming for a new project. I need to turn a "robot" to face a human. The human could be carrying an iPhone with GPS, ultrasonic sensor, laser reflector, anything small. Within 15-30 degrees would be close enough. I also need to calculate distance, that's the easy part. So they will already be carrying an ultrasonic device to repeat back the ping. GPS is not good enough because they may be less than 30 feet apart. At larger distances this may be the best solution. I have tried a laser on a stepper, this works so long as there is a Retroreflector mounted on the human. The device below has a stronger signal when pointed within 15 degrees. Is that the simplest solution? The range is not enough with a passive reflector. What range would I get with another ultrasonic device to ping back?

HC-SR04 Ultrasonic Sensor | Let's Make Robots!
Retroreflector - Wikipedia, the free encyclopedia

How about 2 IR sensors with a wall between them? A stepper to turn it until both are equal? What are the pros and cons for this method? Range?

If there were an accurate (100us) clock synched on both ends a laser could scan back and forth. All that is needed is the time of the received beam to calculate the relative angle. I can easily implement the clock part.

Since this is a Laser Forum, let's limit our ideas to those involving Lasers. I included my additional thoughts as background so you can see where I'm coming from. Ideas anyone? Let's Brainstorm together!

This is a device that will be used by Homeland Security to fight terrorism, any good ideas will get credit in my code and a chance to see our product in Action! This is a new project for me, so ideas are sure to come quickly.

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

All times are GMT. The time now is 09:31 PM.

 -- DarkShadows V5 -- Responsive LPF -2562016 -- Default Style Contact Us - Laser Pointer Forums - Archive - Top