RR Rated M For Mature
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 878 ONLINE 18 EVENTS SEARCH REGISTER  START HERE
 
1 page2261 viewsPOST REPLY
Esprit Model . Thunder Power RC . Mikado Modellhubschrauber

.
.
FPV First Person View
UAV Autonomous Unmanned Aerial Vehicles > following a radio telemetry signal
 
 
wild1957
Senior Heliman
Location: Malaysia

My Posts This: Topic  Forum		I have a tricky question for you boffins out there. I work with the organization called WWF (not the wrestling) here in Malaysia and I have been asked by one of our scientists if the helicopter can be made to fly autonomously to follow a radio signal being transmitted from a radio telemetry collar. I know the heli can follow a gps signal but can it follow a signal from a vhf transmitter then log the position as a gps co-ordinate.

Stephen
12-18-2007 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
ErichF
Elite Veteran
Location: Odessa, FL 33556 (Tampa Area)

My Posts This: Topic  Forum		I don't see why not, just a simple DF steer. The aircraft may have to make several turns in order to acquire the DF steer, but once done, it should work well. You have to have a highly directional antenna array similar to one found on ELT trackers.


We were looking at doing similar work in Kenya to count lion populations, but that didn't work out for some reason.
12-19-2007 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
wild1957
Senior Heliman
Location: Malaysia

My Posts This: Topic  Forum		Hi Erich,

Thanks for your comments, Can I ask you what is DF steer? can yo say why you did not pursue this on the lion project?
I have to try to track tigers in a forest so not as easy as the open plains of Africa but I am interested to see if I can get it to work.
Any advice would be welcome.

Stephen
01-03-2008 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
ErichF
Elite Veteran
Location: Odessa, FL 33556 (Tampa Area)

My Posts This: Topic  Forum		A DF (Direction Finding) Steer is the term for which direction you turn to home in on a radio signal, or a series of turns in which you determine which direction the radio signal is from.

We didn't end up doing the job, it was just proposed to us a couple years ago, once. It sure sounded interesting, though, and wish it would have worked out.

Foliage would play havoc with getting a pin-point position on an animal, but depending on the signal band and such, could get you in the area. I've done plenty of ELT searches from the air over foliated areas. ELTs use 121.5 mhz.
01-03-2008 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
wild1957
Senior Heliman
Location: Malaysia

My Posts This: Topic  Forum		Do you know where I can look to get more info on what I will need to get this working on the heli?
01-04-2008 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
HunArcher
Heliman
Location: Gödöllő, Budapest - Hungary

My Posts This: Topic  Forum		Radio telemetry, GPS lokation

Hello everyone!

I am Daniel from Hungary. I have a question for you. I'm learning and working in the Institute for Wildlife Conservation in St. Stephen University, and it's making a lot of radio telemetry monitoring. I'm writeing my thesis abuot Capreolus capreolus, and I need a lot of professional literature about radio telemetry and GPS lokation. I'm doing a comparative examine about these monitoring systems. So I have to get circumstantial literature in that issue, but in my language I didn't find any. So I would be pleased if anyone of you could give me an Internet address where I find specification abuaout these themes, or something which could be useful.

Daniel
02-27-2008 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
HunArcher
Heliman
Location: Gödöllő, Budapest - Hungary

My Posts This: Topic  Forum		Forgive my faults of spelling.
02-27-2008 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
Dr.Rivet
Senior Heliman
Location: Seattle, WA, USA

My Posts This: Topic  Forum		I know that original question was posted long time ago, but thought I would share my thoughts in case if anyone is interested.

Well, full scale aircraft already do this for decades, it's called ILS system which consists of glide slope and a localizer which will give you a position in vertical plane with reference to approach path if you add DME it will give you distance to the source of the signal. All this equipment could be bought used at www.trade-a-plane.com and stripped down from heavy boxes to save weight. Then all you need is a used autopilot to couple with those devices. I know it's not that simple

Now transmitting equipment costs millions i think and usually is the size of a building...

Just some food for thought.
05-14-2008 Over year old.
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
MutantGarage
Heliman
Location: Texas, USA

My Posts This: Topic  Forum		Big problem is going to be flight time, 30 minutes or so for a heli.
It might be more useful for flying up and searching for the collars
using direction finding radios to get multiple heading fixes while flying a pattern.
11-10-2009 06:32 AM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
1 page2261 viewsPOST REPLY
Futaba-RC . Boca Bearings . XHELI.COM

.
.
FPV First Person View
UAV Autonomous Unmanned Aerial Vehicles > following a radio telemetry signal
 Print TOPIC Advertisers 

Subscribe to This Topic

Monday, November 23 - 11:15 pm - Copyright © 2000 - 2009 runryder.com | email | link to rr | START HERE | NF