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Videos of APM 2.0/ 1.4 1280 & 2560 machines

(Moderators- Notified user of pics and video requirement to be approved for posting)

 

Hey DIY Droners,

There's a dearth of videos from DIY Droners as I've observe. I'm just wondering how come we don't put out much videos of our machines equipped with APM 2.0s/1.4 1280 & 2560 machines on Youtube and/ or Vimeo and some other video hosting sites. 

When you search APM 2.0 at YT, the result at the top is the video of the APM 2.0 equipped Multiplex Fun Cub that I made last January yet. I am hoping that by now, the count of that video should have been surpassed by some other awesome production of an APM equipped machine. C'mon guys, crank out videos and clips of your quads, helis and airplanes out there. We need to get the good word out! Peace!

 

Gent  

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Attack of the Clones!

3689473405?profile=originalI was pilfering through ebay for some good deals on camera gimbals and I stumbled upon a store called gadgetinfinite.  They are selling several 3DR clones on their site.  I also noticed another one called game-jmt that is selling 3DR radios.  It seems there is an endless cycle of clones coming from China with no end in site.  Even though 3DR hardware is open sourced they are intent on selling this hardware using the 3DR name, trying to pass it off as original, but I highly doubt it is.  

I have read several debates about the pros and cons about Chinese companies cloning U.S. merchandise.  Personally I don't see any pros.  Most of these rogue companies are only cloning to profit and not innovate.  Will there ever be any way to regulate this? Should it?  It makes it awfully discouraging for anyone wanting to bring an innovative product to market knowing that there is little they can do to keep foreign companies from cloning their ideas. 

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Mapping a Larger Area

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I got a chance to make a larger map with the E382 a few weeks ago and I ran it through Agisoft Photoscan for the postprocessing.

 

Platform: E382

Camera: SX230 HS with CHDK

Mapping Time: 30 minutes

Flight Time: 33-34 minutes

Images used: 341

Processing Time: ~12 hours of computer time, <30 minutes operator time

Area covered: 350 acres, 1.41km2  –  1550 x 910m rectangle

Area measured with QGIS

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3d DEM viewed in GlobalMapper

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Always have to try out the global warming tool

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The only tips I have for those mapping larger areas is to first of all make sure you're spacing your flight lines appropriately based on your altitude. You can find good data on how much ground area is covered per image from Krzysztof Bosak's ebook The Secrets of Aerial PhotoMapping. Be sure to run through the images once before you process them and remove the blurry ones. Also make sure you're taking plenty of pictures so that removing the blurry ones doesn't leave any gaps in coverage.

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Distributor

Yesterday a few  of the UK Ardupilot group (Malcolm, Dean & I) arrived at a flight field ready to take a look at and test the DJI Innovations WKH on a traditional Heli, this was installed on a Spectra petrol Heli, it was sent out to hold its position in GPS ATTI mode, we filmed the Spectra to show how it got on! Dean had his OctoCopter there so we tried the "point of interest" function on the DJI Wookong M to add a new angle to the video & show the WKH in position hold.

 
Both the WKH & WKM both performed without fault, the WKH held the traditional Heli in position from the start of the video until the end without pilot intervention!


One the more interesting points about the WKH and the Heli was the level of vibration coming from the engine which was very high frequency, if you have ever flown Nitro / petrol engine planes before you will know how much vibration is produced from these single piston engines. The WKH IMU did not seem to mind any of these vibrations passing through the frame. At the start of the video you will see the IMU is placed within a few cm of the engine.


We also tried the Atti mode and it worked just as well as GPS ATTI, the Heli was very stable and easy to fly in all modes including "manual".

 

Regards

 

Martin.

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MIT grad students studying Robust Robotics designed a plane that can operate in tight spots — avoiding pillars and low ceilings — without a GPS or outside help. The plane uses an on-board laser range finder and inertial sensors to fly right. To demonstrate just how accurate the on-board navigation systems are, the team of scientists took the autonomous plane to a parking garage with ceilings just 2.5 meters high.

 

See the plane in action:

https://www.youtube.com/watch?v=kYs215TgI7c&feature=player_detailpage#t=0s

 

See the full article here:

MIT News Article

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FPV Equipment Test

Testing out some FPV equipment on the bench isn't as exciting as it should be. With some limited time this past weekend we mounted  (re: threw together a rats nest of wires and rubber bands) everything on a mobile test bed -  a 1/8 Scale MadStorm NP Truggy.

Components include:

  • DragonLink
  • 1W Lawmate @ 1280MHz Vtx
  • Lawmate Vrx
  • Fat Shark Dominator Video Goggles

 
1.8%2BExceed%2BMadStorm.JPG?width=250

 

Video of the car in action:

Unfortunately the majority of time was spent getting the car up and running!

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100KM

techpod test flight #2

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 I went out to the field at the cascade rc airfield on tuesday 8-7-12. located in snohomish ,wa . today it was me and nick weber . we got to the field and got all the fpv gear set up and the techpod ready .nick tossed it it the air for me and it climbed out nicely . i did a couple laps and at one point the throttle cut and was unresponsive . It came back after a second and i brought it in for a landing . while i was landing i lost throttle again . Luckily the techpod glides well and i greased her it near the end of the runway .here is a picture of the launch and the in flight video . much more to come after sunday . read more about the techpod at hobbyuav.com enjoy :-)


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I have now set up my battery charger power supply unit with a cable long enough to supply power for my small quad copter for inside testing. This will save the life of the batteries as well avoid the hassle of swapping them over constantly for when doing PID tuning etc. Only thing its not powerful enough to fly my X8 quad and trips the over load at about 29amps. Ill try see if ii will run my hex next. Here is the video of the small quad run

https://www.youtube.com/watch?v=PM4oZEulyqg&feature=youtu.be

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3689472936?profile=originalHi guys,

The Smart MOSFETs are now really smart enough to use them in such applications as RC High Current switches. More, they have a current sensing output, which could be used for current sensing instead of commonly used Schunt+IC .

An example for such a device is BTS50015 - BTS50015-1TAA-Data-Sheet-11-Infineon.pdf

The very low Rds of less than 1.5mOhm and 3.3-5V drive voltage capabilities make it a nice device for further researches. The ICs could be also connected in parallel for higher currents.

Here is a typical current sensing diagram from IS pin:

3689473105?profile=originaland a typical application:

3689473157?profile=originalI'm going to design some prototypes based on BTS50015 and BTS555 and after testing them I'll post the results.

Enjoy and have fun!

Nick

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I managed to test the Altitude Hold and Loiter functions of my ArduPilot Mega2 controlled Hexacopter and was pretty impressed with it. There was strong winds initially but when it died down to a breeze I turned on the altitude hold and it seemed to hover with a deviation of around 2m. Then when I turned on the Loiter mode, my hexacopter stayed within a 5m radius despite some wind. The fact that I didn’t do any adjustments and used everything stock was quite impressive to me. The firmware and code is well written I guess.

 

 

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Developer

More pics from AUVSI 2012

3689472679?profile=originalThe Unmanned Innovations QuadCopter.  They mostly focus on building custom autopilots for quads mostly but they are also working on adding support for hexa, octa, traditional helicopters.  My understanding is when you buy their quad, they also give you the source code that it's flying.  A very technical bunch who really seemed to know their stuff and were happy to talk about the details of quad copter control algorithms.  They backed up the our current theory on the cause of the altitude jump that some of us see when yawing arducopter is most likely caused by the non-linearity of pwm vs thrust in the ESCs/motors.

 

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The MicroFlown microphone that could determine the exact direction of loud sounds (like a person clapping their hands).  In their demonstration video it was mounted in the plane shown and then flown overhead.  As it flew it would determine the location of simluated gunshots on a ground station.  Yours for around $25k.

 

 

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Left is a Carl Hayden Falcon Robotics (highschool!!) student who along with the rest of his class had put together a functional underwater uav.  The pros must be worried when they see even highschool students are building UAVs these days!  The robot was driving around in a water tank at various times during the 3 day event (video here).

Right: some innovative work on a monocopter by a team of 3 Embry-Riddle University students.  The blades were 3d printed and apparently it flies although they did not have a demostration video.

 

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JDI's hexa and fancy camera mount.  Why does it have slightly upturned arms?  Presumably for added stability.  $6k which compared to the military quads (all >$30k+) suddenly seemed like a bargain. The reps I talked to were all business, there to sell and not actually much fun to talk to but it was a nice looking system and they were one of the few teams actually doing real flight demos.

 

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Two DIYDrones comrades, on the left, FalconUAV which uses the procerus (now lockheed martin) autopilot aimed for use by law enforcements.  On the right, ScionUAS's latest traditional helicopter UAS using a custom autopilot.  Both systems were demostrated at the recent Colorado Multicopter Rodeo as well by the way.

 

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The Aeryon Quad and accompanying ground station which can be yours for around 100k.  As many of you know it has no RC style controller, it's all done through the IPAD like ground station software.  It's strong point is that it can still fly in very strong winds and easily replaceable arms which simply snap on and off (i.e. no wires to fiddle with).  It was surprisingly light and seemed mostly made of plastic.


3689472772?profile=originalCastle Creations displays Ed Kirk's (a DIYDrones member's) tricopter and their prototype device that provide feedback of the motor's RPM, current, etc to the microcontroller.  They also appear to be working on ESCs that are specifically suited to multicopters.


3689472790?profile=originalUAVFactory's plane platform (i.e. no autopilot) and groundstation (not including computer) priced at around $16k and $9k respectively.  The plane boasts a flight time of >50hours and they claim 70+ are in operation around the world.

 

3689472833?profile=originalMicroDrones's quadcopter boasting 90min flight time.  Even in outdoor (i.e. non ideal) conditions the rep claimed an hour is very possible.  They sadly wouldn't divulge any details of how they accomplished this but some other attendees believed it was accomplished mosty with an incredibly light frame, no payload and by sacrificing maneuverability and control for the sake of flight time.  I think a T3 contest on DIYDrones is in order to see how well we can do.

 

3689472740?profile=originalOn the Left is MicroPilot's based autopilot line-up (about 1.2k ~ 5k I believe) for a variety of platforms including traditional helicopters and airplanes.

On the right is VectorNav's AHRSs which are incredibly small despite including the 3-axis accel, gyros, sensor fusion processor and a GPS!  The silver ones are the SMD versions, the red ones are the same tech but enclosed in a case and are meant to be attached to your navigation controller via a (serial?) cable.  These guys were great fun to talk to as they were very technical and happy to get into the details.  In fact, like ArduPilot they use the Invense MPU60XX for the accel/gyro and a ublox for the GPS but their value add is the sensor fusion algorithms (12 or 13 stage kalman filter - they don't rely on the DMP) and the chips come all pre-calibrated (temp and drift).

 

3689472851?profile=originalTop Left: LiquidRobotic's Long distance wave powered research platform.  These travel at only 2mph but because they require no fuel they are sent out to sea on up to one year missions to gather data.  Solar panels on the top power the sensors and autopilot.  Iridium is used for two way data transfer including current location back to the ground station and way point updates.  There's apparently 4 floating about as we speak, one on it's way to Japan.

Top Right: MorrisTech displays their 3d printed titanium creations.

Bottom Left: IRobot's not just making vacuum cleaners anymore.  The special bit is the articulated track which allows to climb over rocks easily.

Bottom Right: Fly-N-Sense's coaxial copter designed for safety.  Besides tech hurdles, they're looking at the legal hurdles faced trying to getting permission to fly over crowds.

 

Generally people I talked to thought the tech's advanced a lot in the past year.  Most people have a system that does waypoints and provides live video so to stand-out you need something extra or you need to show how you're taking that tech and putting it into real applications.  Despite that I didn't see any cooperating robots or robots that can perform a more vaguely defined mission completely on their own (like filming a crime scene from every angle)...maybe next year!

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The sun was out, the winds were light, the temperature was about 85F, it was my birthday. There was nothing else to do but discover if all the time, money, energy, planning, and hope would work out.

It was a qualified success! Qualified in that I think pitch is reversed but in the case of today's short effort, it was another event of discovery on the road to longer flights.

 

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The good news was I did not break a prop! The casualty of the trials was a leg! Anyone out there want to report how the stock 3DR legs break? They do sell spares at the store so I suspect one or two have failed.

 

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The leg breaking may have been encouraged by the tether arrangement. The quad was blown while the line was taught and circled into the yard while I lowered the throttle. It impacted on the leg sideways moderately hard. The ground was wet and the toe stuck in the dirt while the copter kept rotating. The break was where one might expect it, at the through hole for the cross brace. If it had been on the driveway, I suspect it would have just skidded.

From my previous blog posts you would have known that while cutting legs out with my home brew CNC mill, I made plenty of extra legs. 10 minutes on the bench later and the Arudcopter was ready to go again. Unfortunately it was time to pack up and go see the grandchildren.

The tether weight was an old lamp ballast I use for a glue weight. I didn't think the copter could drag it anywhere especially with the small 'purple' motors (3DR sourced).

While driving to Tennessee to see the kids, it occurred to me that some sort of telescope/tilt platform would be a good tool for a copter-in-adjustment. All too often I read posts of noobs like me wanting to blame the APM or code for a setup issue. I suspect some form of gimbal jig to allow a tethered hoover would confirm if a command axis is reversed.

Throttle was good with liftoff around 52% of stick. Yaw seemd correct but the tether would yaw the quad when wind blew it to the rope end.

All in all, I am pleased and it was not a bad way to spend my 54th birthday.

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3D Robotics

Farm robots only pick the ripe strawberries

3689472866?profile=originalOne of the biggest commercial opportunities for robotics is agriculture, which I find endlessly fascinating (probably because I know nothing about farming!).  This isn't exactly drone-related (although lots of farmers are using drones for everything from multispectral imaging to crop-spraying), but Forbes has a good roundup of some recent developments:

A new project that’s part of the European Union Seventh Framework Program (FP7) cRops (Clever Robots for Crops) is focusing on creating robots to harvest high value crops.

The cRops robotic platform will be capable of site-specific spraying (targeted spraying only on foliage and selected targets) and selective harvesting of fruit. The robots will be able to detect the fruit, sense its ripeness, then move to grasp and softly detach only the ripe fruit. Another objective of cRops is to develop techniques for reliable detection and classification of obstacles and other objects to enable successful autonomous navigation and operation in plantations and forests.

...

Harvest Automation, based in Boston, MA, raised $7.8 million in a series B funding round in November 2011. Harvest is focusing on agricultural robotics and focusing on greenhouse and nursery automation. They want to resolve acute manual labor problems across multiple industries but are starting with agriculture.  The Harvest Automation robot costs around $25 to $50k and because the manipulation requirements of the robots are lower in this sector, the company focus on creating a viable business, reducing costs and higher yields, rather than worrying about how to incorporate expensive robot arms into their operations.

...In Japan in 2010 the Institute of Agricultural Machinery’s Bio-oriented Technology Research Advancement Institution, created a strawberry picking robot with a stereo camera system that images the strawberries in 3D and image-processing algorithms determine their ripeness. If a strawberry is at least 80 percent red, the machine snips it at the stem and puts it in a padded bin. It can harvest 60% of the strawberry crop, taking only nine seconds to pick a strawberry. But, according to a machine-vision specialist who worked on the strawberry picking project, this robot won’t happen without government subsidies.

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3689472396?profile=originalWe've done "FPV" video before, but this time, we've got slightly better resolution, two cameras, techno music, and an interesting landing. We're building drones for high school students to learn about computers, robotics, and environmental science. It's called "Drones for Schools," and it's part of a National Science Foundation grant to improve STEM education.

The video is probably lower-res than it should be, considering the primary camera was a Hero 2HD camera, but that's a production software issue we're hoping to fix. While this drone is equipped with an APM 2.0, we didn't use it for this shoot, which is why it's a bit wobbly (user error -- novice pilot here). The HD camera did add a not inconsiderable weight to our 7lb drone, which had a negative affect on maneuverability.


We hope this promotional video will bring more students into the program, though garnering interest hasn't been much of an issue as of yet. We have three high schools in Illinois looking to obtain drones and training through the program, and we really don't see demand for project-based learning decreasing anytime soon.

Enjoy!

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3D Robotics

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From the LA Times. The product datasheet is here. Does anyone know how they achieve the GPS spoofing protection?

LAS VEGAS -- Two of the major challenges the government faces in attempting to allow thousands of small drones into U.S. airspace are knowing where the aircraft are in relation to other aircraft flying nearby and making sure they're safe from hacker attacks.

Rockwell Collins Inc.  believes it has addressed both concerns with a device that's slightly larger than a postage stamp.

The company's unassuming MicroGRAM device promises to provide precise and secure GPS technology for the kind of small drones that police agencies want to use to spot runaway criminals.

"It's the smallest device out there with this kind of capability," said Dave Schreck, Rockwell's director of unmanned aerial systems and control technologies.

MicroGRAM has been in production since March, but Rockwell spoke about its capabilities Tuesday at this week's Assn. for Unmanned Vehicle Systems trade show in Las Vegas. Hundreds of robot makers have gathered here to show off their wares.

The device provides anti-jamming and anti-spoofing protection. So if a hacker tries to commandeer the drone by sending false GPS signals to trick the aircraft's receiver -- like what was recentlydemonstrated at University of Texas  at Austin -- the ne'er-do-wells will be locked out.

Drone hacking is a concern that has risen ever since the government revealed plans to integrate drones into U.S. airspace by 2015.

Rockwell's MicroGRAM is currently on drones built by AeroVironment Inc. of Monrovia, the nation's biggest supplier of small robotic planes.

"When people see how small it is, I hear them gasp," said Trevor Overton, Rockwell's MicroGRAM program manager. "We think this device provides the kind of capabilities that the unmanned aircraft community is interested in."

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ReAllocate.org using UAVs for Humanitarian Aid!

ReAllocate.org is pleased to announce the launch of a pilot project at this year’s Burning Man Festival, code named “Project: Blue Sky,” to test the viability of using Unmanned Aerial Vehicles, or UAV’s in crisis and remote situations.

 

“Project: Blue Sky” will model first-responder surveillance scenarios and “last mile” delivery challenges. This analysis will enable timely delivery of high-value / light-weight payloads to areas that may be otherwise inaccessible. These multi-copters may deliver vaccines and provide first-responders with eyes in the air for search and rescue operations.

 

We would love the support of the DIY community in helping us achieve our vision!! Donate here! Thank You! 

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3689472702?profile=originalLately, this project of implementing solar cells into a homemade 4.68 meter glider platform has been neglected, though have considered to complete it to one's needs.

If someone is interested in purchasing this aircraft fully finished, it will combine at least 152 quantity 2 cm by 4 cm monocrystalline silicon solar cells(rated @ <18%) fully or only partially integrated into the airframe. Cost is exceptionally low since I haven't yet done much work on preparing the balsa rib covered carbon fiber spar.

  • AG 24, AG 25, & AG 26 combo selection of airfoils were precisely hand crafted
  • Wingspan is 184"
  • Total weight of current frame state is about 180g
  • 68x 1/16" balsa ribs
  • Wings in 3 sections: 1x 1 meter, 2x 1.8 meter
  • 3 carbon spar thicknesses
  • All frame structure Epoxy cured

This would be perfect for a college project or anyone considering a almost ready to fly solar powered aircraft, which is rare to find. My location is in San Antonio, TX, and if you are interested in either buying the glider fully implemented or separate of the photovoltaic cells,

Please contact me @:

devinjohnson@satx.rr.com

-or-

(210) 413-6876

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