"Hi Jake,
Do you recommend a specific laser for scanning?
Thanks,
Matt"
Justin's Discussions
Design
Started this discussion. Last reply by Dave Feb 23. 2 Replies 0 Likes
I'm just getting into the UAV and Multicopter platforms for a change from other platforms and I've picked a fairly straight forward Quadcopter frame. Then in a photo link to a news story I saw the…Continue
Sonar Options
Started this discussion. Last reply by droter Apr 14. 13 Replies 0 Likes
Hi,Relatively new to UAV's and planning on getting the new APM2 and a Telemetry kit. I was also contemplating the sonar modules for collision avoidance and auto landing/takeoff and have 2…Continue
Motor and prop choice
Started this discussion. Last reply by Dave Feb 23. 14 Replies 0 Likes
So looks like I'll be starting my Quadcopter project earlier than I expected :) YAYI'm planning on getting the new APM2 board and possibly this frame (With looks like that how could you turn it…Continue
DIYDrones Xbee Telemetry Kit
Started this discussion. Last reply by Justin Feb 3. 2 Replies 0 Likes
Hi,Just wondering if the Xbee modules have their frequency set by the user or if it's random or a FH algorithm or similar it uses as the module on the website states:ISM 900 MHz operating frequency…Continue
Justin's Page
Latest Activity
Aerhead replied to Justin's discussion Sonar Options"JakeA sweeping laser or scanning laser does a great job of ranging objects up to 270 degrees. Lasers have the advantage of the speed of light. Sound is slow. If you're going to get a sonar picture of the obstacles a number of…"
Jake Stew replied to Justin's discussion Sonar Options"With 8 fixed sensors you're only going to get 8 ranges, or 8 sectors of information. If you used a sweeping design you could generate as much data as you want. With a normal servo (180 deg) you could put two opposing sensors to…"
Aerhead replied to Justin's discussion Sonar Options"Jake
The sensors don't take much power or give out to much EMF. The dedicated micro would just be looking for the first PWM input to go low and pass that signal on the the APM 2. This design would give 8 times as much resolution as one…"
Jake Stew replied to Justin's discussion Sonar Options"You'd be a lot better off putting a sonar ranger on a servo and sweeping it around. 8 sonars pinging 10 times a sec is probably going to cause some problems somewhere."
Aerhead replied to Justin's discussion Sonar Options"yes if you're looking at moving at 2 mph or more."
Peleus replied to Justin's discussion Sonar Options"So in other words it's physically possible but however it's rather impractical / unsuitable to do it via this method for control purposes. I'd be better off trying to create an independent board reading in each…"
Aerhead replied to Justin's discussion Sonar Options"Peleus
The problem with daisy chains is time. Each of the better sensor XLs take 99ms to get a measurement, 10 sensors would take a second. The cheaper sensors run twice as fast but have some other problems that make them harder to work…"
Peleus replied to Justin's discussion Sonar Options"Hey all,
A lot of this sounds really interesting, I'm actually doing a project on object detection / avoidance at the moment.
Sorry it's a very basic question, but I'm only starting to become familiar with the APM…"
Aerhead replied to Justin's discussion Sonar Options"Justin
There's strength in numbers. I'm also interested in collision avoidance. From reading the data sheets provided by Maxbotixs I'm going to use the MB1261 sensors. I've used both the MB1260 and MB1261…"
Justin replied to Ian forbes's discussion APM 2.0 and XBEE 900mhz modules, How do I convert to use the modules with an antenna?"When 'meshed' they essentially work as repeaters, so the only way to increase your range with a second is if you had another based inside the range of both."
Justin replied to Justin's discussion Sonar Options"Still hoping someone can answer me before I order the rest of the parts :)"
Dave replied to Justin's discussion Design"Also better for filming as there's a wider gap between the arms - wider field of view possible before the props start appearing in frame."
michael_au replied to Justin's discussion Design"Hi Justin,
I came across the CSIRO article this morning also.
Yes, you can generally expect some instability due to inter-prop wash interference. However, this can be migitaged with appropriate tuning and vibration dampening. The…"
Justin posted a discussionDesign
I'm just getting into the UAV and Multicopter platforms for a change from other platforms and I've picked a fairly straight forward Quadcopter frame. Then in a photo link to a news story I saw the link below and clicked on it and thought the design looked quite odd. It appears they've gone for a Tricopter design but either double ended motors or 6 motors as they've doubled up the blades on each side. Wouldn't this lead to more instability due to the turbulence created between the 2 blades…See More
Dave replied to Justin's discussion Motor and prop choice"I can't comment on their performance, although there are some not-so-good reviews about them on the HK site.
Again, you want to look at the mounting. They have an odd triangular layout for the mounting holes. For that frame, you…"
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