Hello,
For a project, I am creating a robot that will be able to follow one person, and will follow nothing else. Is there any feasible way of doing this? The person could be carrying a transmitter or something, as long as it can fit in a pocket.
Thanks!
What range?
Indoors or outdoors ?
Hello,
Thanks for replying. I would probably only want the robot following me indoors.
Indoors i think reflections would be a problem for rf tracking, not easy anyway, i think its probably better to use ir led and track highest intensity, its not an easy thing to do.
Which room you are in is easier, where in the room you are not so.
Reading IR with Arduino is easy and here is an interesting articleabout making a 38kHz IR transmitter.
OK, you can't have the followee keep that transmitter in a pocket, but perhaps you could mount it on a shoe or something?
Anyway this might get you thinking.....
Ultrasonic transmitter and receiver witj signal strength averager attached to srrvo scanning back and forth with code to turn toward
the signal.
That may be problematic due to resonance and reflection, possibly standing waves.
I used to maintain ultrasonic space monitoring and it was never particularly good.
Lots of false alarms , sometimes it did not work at all.
jremington:
Suitcase of the Future Follows You - ABC News
I saw that , bluetooth though at 2 GHZ is really a job for custom hardware though not an arduino.
I have visions of being followed through an airport by a crocodile of other peoples luggage though.
Bit of a bother with airport security i would imagine as well.
JimboZA:
Reading IR with Arduino is easy and here is an interesting articleabout making a 38kHz IR transmitter.OK, you can't have the followee keep that transmitter in a pocket, but perhaps you could mount it on a shoe or something?
Anyway this might get you thinking.....
This looks great. Do you think there are any downsides to this?
Joyyan:
This looks great. Do you think there are any downsides to this?
That, I could not say. It will be cheap and easy to test: a 555 for the transmitter and something like a TSOP34838 as receiver.
I was going to make one of those transmitters today but I don't have a 102 cap.... I'll get some tomorrow.
I guess one downside is making sure the followee always carries the transmitter so that the IR is pointing outward.
In fact thinking about this, it might not even need the IR library. The way I read the TSOP datasheet, it activates or deactivates the output based on the presence or absence of the 38k carrier. There's no need to have a message modulated into the carrier, it's probably enough to be on or off.
So it's really just a matter of perhaps having the IR receiver on a servo so it can "look" and direct the robot accordingly. I have a day off tomorrow Monday so I'll go get the necessary capacitor to make the 38k carrier. My meter measures Hz so I can get it accurate.
Schematic below shows what I'm thinking..... Easier to read if you download it and read outside of the Forum.
38k generator receiver.bmp (102 KB)
Robot suite case that follows with some construction info.
I am busy with the same type of project using ultrasonic sensors and so far its working well, also have a look at this link
Undermentioned:
I am busy with the same type of project using ultrasonic sensors and so far its working well, also have a look at this link
Robot Luggage- My Ben Heck Experience | Colecago's Blog
What are the ultrasonic receivers? Because that's why I'm thinking IR, since it's easy to have a generatro / receiver. I'm not familiar with ultrasonic receivers, just pingers.
Well im using HC-SR04 sensors i just removed the Trig transducer so that it doesnt interfere with the echo transducer for the receivers and the same with the Ping sensor( the one that sends the trig/ultrasonic sound out)
JimboZA:
Joyyan:
This looks great. Do you think there are any downsides to this?That, I could not say. It will be cheap and easy to test: a 555 for the transmitter and something like a TSOP34838 as receiver.
I was going to make one of those transmitters today but I don't have a 102 cap.... I'll get some tomorrow.
I guess one downside is making sure the followee always carries the transmitter so that the IR is pointing outward.
So how would you keep the IR emitter on all the time? A battery pack would be too large.
