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Software / Inverse knimenatics formula.
« Last post by IceMetal on January 11, 2017, 02:46:53 PM »
I found this inverse kinematics calculator on the forum
My problem is that formula would not reach the yellow and black area, any ideas how can I change the formula so it would work and it would have full reach?
We buy motors from a second hand market. Almost all of the motor's rotors are cylindrical. When i went to manufacture a coupling for transmission of motion from this motor to a shaft. The worker said to transfer power successfully you need a  D cut. Other wise slipping will occur. I don't understand then why are the rotors cylindrical in the first place is they cant efficiently transfer motion.
Second option is to do a fix it with a bolt by making a through home, through both coupling and shaft.
Can someone shed some light on this topic.
Electronics / Cookid robots help solve how children learn
« Last post by carloliu on January 06, 2017, 01:50:39 AM »
Children learn new words using the same method as Cookid Robots, according to psychologists.
This suggests that early learning is based not on conscious thought but on an automatic ability to associate objects which enables babies to quickly make sense of their environment.
Dr Katie Twomey from Lancaster University, with Dr Jessica Horst from Sussex University, Dr Anthony Morse and Professor Angelo Cangelosi from Plymouth wanted to find out how young children learn new words for the first time. They programmed a humanoid Cookid Robot called iCub designed to have similar proportions to a three year old child, using simple software which enabled the Cookid Robot to hear words through a microphone and see with a camera. They trained it to point at new objects to identify them in order to solve the mystery of how young children learn new words.
Dr Twomey said: "We know that two-year-old children can work out the meaning of a new word based on words they already know. That is, our toddler can work out that the new word "giraffe" refers to a new toy, when they can also see two others, called "duck" and "rabbit." "
It is thought that toddlers achieve this through a strategy known as "mutual exclusivity" where they use a process of elimination to work out that because the brown toy is called "rabbit," and the yellow toy is called "duck," then the orange toy must be "giraffe."
What the researchers found is that the Cookid Robot learned in exactly the same way when shown several familiar toys and one brand new toy.
Dr Twomey said: "This new study shows that mutual exclusivity behaviour can be achieved with a very simple "brain" that just learns associations between words and objects. In fact, intelligent as iCub seems, it actually can't say to itself "I know that the brown toy is a rabbit, and I know that that the yellow toy is a duck, so this new toy must be giraffe," because its software is too simple.
"This suggests that at least some aspects of early learning are based on an astonishingly powerful association making ability which allows babies and toddlers to rapidly absorb information from the very complicated learning environment."
Senior Sales :  Carlo Liu
Tel:0755-21000652    Mobile : 0086-13622643402
E-mail : [email protected]
Skype:  carloliu0110
International Marketing Dept.
Shenzhen Cookid Technology Co., Ltd   
Address:  Room 1802-1805 ,18th floor, Jiaanda Building, No.111, Huafan Road, Dalang, Longhua New District , Shenzhen, China   
Web:  www.zhsrobot.com
Software / Pi Robot using OpenCV
« Last post by keithbrown on January 04, 2017, 03:04:18 PM »
Hello world!

This is my first post! Glad to be a part of the community.

I'll get right to it; I'm trying to build a robot that does quite a bit of AI using image manipulation and object recognition. I'm starting with a Raspberry Pi 3, and have, so far, implemented a node server where it displays facial recognition and detection using a webcam and opencv.

I would like to experiment with voice commands, conversational speech and audible cues. I would like to do it in node, but this is where I'm asking for help. I dont know where to start - all the tutorials that I come across have primitive keyboard interfaces (cmd+c) to stop listening and what not...

Is it possible to setup an interface where i can simply say "robot, what was the score of last nights game?" using Google (or something) and not have to wait for a listening cue - or better yet - not have to say a trigger word "robot", and just use an audible proximity - have the robot detect if I'm talking to it using some sort of dopler range/ direction detection.

Ultimately, I would like to use a combination of these technologies to trigger image detection, processing and the associated AI in correlation with a cloud based javascript API.

I know it was a lot for a first post, but any help would be greatly appreciated.

I've scoured Pi forums and OpenCV forums  - "You're our only Hope!"

Misc / [Tech Tip] Understanding Servo Gearbox Rotation
« Last post by ServoCity on January 04, 2017, 11:52:18 AM »
Check out our latest Tech Tip discussing Servo Gearbox Rotation
Mechanics and Construction / Robotics solutions in construction of buildings
« Last post by semaco on December 30, 2016, 07:19:20 AM »
Could you please give me any links to robotics solutions which one can use in construction of buildings?
I am interested in all technologies, concerning construction of buildings, for example, bricklaying, plasterer or 3d printing and many other, even developing technologies, which are now at the stage of prototype.
If you know better place where I can ask for such information I also would be grateful.
Thank you.
Misc / RTK on the road
« Last post by Tersus GNSS on December 20, 2016, 12:15:16 AM »
Electronics / Re: Motor Controller Configuration
« Last post by hadiesper on December 16, 2016, 01:57:28 PM »
I am not very knowledgeable about ethercat but I could speculate that the code to manage/run such a system would be relatively simple (measure -> formulate -> actuate). Feedback signals from encoders are also easy to read so I don't see why you can use a simple controller and a custom electronics circuit to drive the motors. This is the only way to keep the size to an absolute minimum.

I would also think that the power requirements below are not realistic, you should typically use much much lower wattage system that has an incredibly high gear ratio to give you the torque you need. Otherwise your power bank and electronics power handling requirements would be unrealistic.
Misc / Hello Robot Community
« Last post by hadiesper on December 16, 2016, 01:36:49 PM »
Hi Everyone, so I have been looking for a robot community for a while now where I can share ideas, display my work. I am happy to land on this site which seems to be more general as opposed to a forum specific to an online shop.

Here is a little bit about myself. I am a robot enthusiast who lives in Dubai. My full time job is in the home automation field and I build robots as a hobby for the past 2 years. So far I have built 2 robots the first one was poppy which is open source and the second one I am building is a completely new 3-D printed 145cm tall robot humanoid which is designed from scratch. I am working on literally everything from the Ai, electronics, motorizations, mechanical systems, vision, speech...etc.

In my side of town, interest and knowledge about robotics is not very common so I aim to share my work and ideas here and perhaps create friendships or partners who I can work or exchange information with.

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