Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 63 users online :: 5 registered, 0 hidden and 58 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Senior Project assistance - Automated pneumatic tennis ball

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

Unread postAuthor: roboman » Sun Jan 25, 2009 11:22 pm

What exactly are you going to be shooting?
  • 0

User avatar
roboman
Sergeant Major
Sergeant Major
 
Posts: 176
Joined: Tue Nov 25, 2008 11:18 pm
Location: Long Beach, CA
Reputation: 0

Unread postAuthor: Team PSU » Mon Jan 26, 2009 1:42 pm

Yes, all parts are SCH40 except the hex head cap (SCH80), and all blue pieces are SDR21.

Shooting tennis balls
  • 0


Team PSU
Private First Class
Private First Class
 
Posts: 25
Joined: Tue Oct 28, 2008 8:38 am
Reputation: 0

Unread postAuthor: Ragnarok » Mon Jan 26, 2009 1:50 pm

roboman wrote:What exactly are you going to be shooting?
Team PSU wrote:Shooting tennis balls

That's not the question he was asking. He was asking what the target was going to be for demonstrating your target recognition.

It would not be appropriate for this to be a person, for obvious safety reasons (not to mention that such a thing is against forum rules).
  • 0

Does that thing kinda look like a big cat to you?
User avatar
Ragnarok
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Tue Dec 19, 2006 8:23 am
Location: The UK
Reputation: 8

Unread postAuthor: Combustion Monkey » Mon Jan 26, 2009 5:06 pm

Just a small side question. Could the mechanisms in the above animations be applied to a combustion cannons as well?
  • 0

User avatar
Combustion Monkey
Master Sergeant
Master Sergeant
 
Posts: 153
Joined: Sun Jan 11, 2009 3:01 pm
Reputation: 0

Unread postAuthor: MaxuS the 2nd » Mon Jan 26, 2009 6:09 pm

Team PSU wrote:Yes, all parts are SCH40 except the hex head cap (SCH80), and all blue pieces are SDR21.

Shooting tennis balls


Those are just wall thicknesses.
Do they have the appropriate pressure ratings written on them?
Chuck it if it says DWV.

Not being pedantic, just preventing injury.
  • 0

Badman
User avatar
MaxuS the 2nd
Colonel
Colonel
 
Posts: 674
Joined: Sat Jan 19, 2008 3:59 pm
Reputation: 0

Unread postAuthor: MrCrowley » Mon Jan 26, 2009 6:22 pm

Chuck it if it says DWV.

Not necessarily, it could say both NSF-PW and NSF-DWV on it.

As long as it has a pressure rating or NSF-PW, it's fine to use.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: Team PSU » Thu Jan 29, 2009 3:28 pm

Yes, all parts are pressure rated, and obviously the target is not a human, considering it's a school project.

The target is either a large shape or color or Infrared emission. This is our biggest challenge right now- the target acquisition system. Most IR systems are only good up to like 80cm, not near the distance we are trying to get.

Anyone have other ideas?
  • 0


Team PSU
Private First Class
Private First Class
 
Posts: 25
Joined: Tue Oct 28, 2008 8:38 am
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: clide » Thu Jan 29, 2009 4:06 pm

Not sure what the max range is on them, but wiimotes are infrared sensors and there is a lot of documentation out there are interfacing them with a computer. With two of them you can do 3d position detection of an infrared object.

Edit: Here is one example.
http://wwwhome.cs.utwente.nl/~fikkertfw ... capita.pdf
  • 0

<a href="http://gbcannon.com" target="_blank"><img src="http://gbcannon.com/pics/misc/pixel.png" border="0"></a>latest update - debut of the cardapult

clide
Donating Member
Donating Member
 
Posts: 785
Joined: Sun Mar 06, 2005 3:06 am
Location: Oklahoma, USA
Reputation: 0

Unread postAuthor: roboman » Thu Jan 29, 2009 7:42 pm

Webcams will work to. That's what is used on most "sentry bot" designs.
  • 0

User avatar
roboman
Sergeant Major
Sergeant Major
 
Posts: 176
Joined: Tue Nov 25, 2008 11:18 pm
Location: Long Beach, CA
Reputation: 0

Unread postAuthor: grock » Sat Jan 31, 2009 2:43 am

on the sprinkler valve thing, if you put a hose barb on the valve instead of a blowgun, then run some pressure rated hose from the barb to your blowgun, but you cant really get too much remote distance without, well, a really long hose. a better idea might be to use about a foot of hose and make some kind of actuator to press the blowgun trigger
  • 0

User avatar
grock
2nd Lieutenant
2nd Lieutenant
 
Posts: 231
Joined: Mon Dec 29, 2008 2:59 pm
Reputation: 0

Unread postAuthor: roboman » Sat Jan 31, 2009 9:58 am

The problem with that is he needs to be able to autonomously trigger the cannon, without any human interaction.
  • 0

User avatar
roboman
Sergeant Major
Sergeant Major
 
Posts: 176
Joined: Tue Nov 25, 2008 11:18 pm
Location: Long Beach, CA
Reputation: 0

Previous

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'