Hi,
im a bachelor's mechanical engineering student, and im currently working on a project that involves a robot finding, locking on, tracking and steering the robot to the target.
Basically i figured out the 2 methods i would like to use for the tracking, but i need help with the transmission and receiving the signal, as i have zero knowledge in this field .
This is what i want to achieve:
-Setting up a transmitter, with a continues transmission (with on/off switch).
-Building a receiver using an Arduino board so that i can track the direction of the signal.
-The transmitter will be set at a max distance of about 20-25 meters.
-The robot should get up to 20 cm from the target (so it should be accurate)
The methods:
I found 2 methods that use radio waves (instead of GPS) for tracking a target, i will begin with the one i think will work the best.
1)Method 1: RDF - Radio Direction Finder
This is what im trying to use and modify for my needs, link.
My questions about this method:
-Can i build a transmitter with the same parameters as the walkie-talkie by myself, and how hard would it be?
i need it to just transmit a signal.
-The robot must fit in a 30x30x30 cm cube, so the length of the antenna of 11.5 inches is exceeding the parameters. In the instructions it says that the antenna should be 1/2 a wavelength long or less, what happens if i shorten the antenna, and what is the minimal length i can use the retain the accuracy and range?
-Dose the dipole antenna has to be straight or can it be a bit curved backwards (in case i wont be able to shorten it and will have to place it inside the robot casing)?
-I know that if i get higher Mhz i can shorten the dipole antenna, how can i achieve that?
2)Method 2: RSSI
This is what i found about this method, link
I understand this method a bit less.
My questions about this method:
-On what kind of signal this method works?
-Can i build a transmitter?
-Can i make the helical antenna shorter or replace it with a flat one like in this video
General questions:
-Which method is more accurate, at long and short range?
-Which method will work best for me, depending on the requirements?
I like the first method better because it has a detailed plan of how to build it, and it looks much more responsive then the RSSI, but i might be wrong. But what worries me, is that the antenna is to long and i prefer not to buy the walkie-talkie but to build something by myself, as i have a lot more components that i need for the project and i want to minimize the overall cost.
Hope i gave you guys all the info you need, so you could help me. If i missed something i will gladly provide the necessary info.
Tnx,
Simon
im a bachelor's mechanical engineering student, and im currently working on a project that involves a robot finding, locking on, tracking and steering the robot to the target.
Basically i figured out the 2 methods i would like to use for the tracking, but i need help with the transmission and receiving the signal, as i have zero knowledge in this field .
This is what i want to achieve:
-Setting up a transmitter, with a continues transmission (with on/off switch).
-Building a receiver using an Arduino board so that i can track the direction of the signal.
-The transmitter will be set at a max distance of about 20-25 meters.
-The robot should get up to 20 cm from the target (so it should be accurate)
The methods:
I found 2 methods that use radio waves (instead of GPS) for tracking a target, i will begin with the one i think will work the best.
1)Method 1: RDF - Radio Direction Finder
This is what im trying to use and modify for my needs, link.
My questions about this method:
-Can i build a transmitter with the same parameters as the walkie-talkie by myself, and how hard would it be?
i need it to just transmit a signal.
-The robot must fit in a 30x30x30 cm cube, so the length of the antenna of 11.5 inches is exceeding the parameters. In the instructions it says that the antenna should be 1/2 a wavelength long or less, what happens if i shorten the antenna, and what is the minimal length i can use the retain the accuracy and range?
-Dose the dipole antenna has to be straight or can it be a bit curved backwards (in case i wont be able to shorten it and will have to place it inside the robot casing)?
-I know that if i get higher Mhz i can shorten the dipole antenna, how can i achieve that?
2)Method 2: RSSI
This is what i found about this method, link
I understand this method a bit less.
My questions about this method:
-On what kind of signal this method works?
-Can i build a transmitter?
-Can i make the helical antenna shorter or replace it with a flat one like in this video
General questions:
-Which method is more accurate, at long and short range?
-Which method will work best for me, depending on the requirements?
I like the first method better because it has a detailed plan of how to build it, and it looks much more responsive then the RSSI, but i might be wrong. But what worries me, is that the antenna is to long and i prefer not to buy the walkie-talkie but to build something by myself, as i have a lot more components that i need for the project and i want to minimize the overall cost.
Hope i gave you guys all the info you need, so you could help me. If i missed something i will gladly provide the necessary info.
Tnx,
Simon