Design Slam Hack Chat

We'll be brainstorming and collaborating on solutions for a wireless positional sensor unit used for inspection. We need your talent!

Friday, July 7, 2017 12:00 pm PT - Friday, July 7, 2017 12:30 pm PT Local time zone:
Hack Chat
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Naveen Nair joins us in the Hack Chat to lead an engineering design brainstorm and collaboration.

Friday, July 7th at noon PDT, @naveen.nair will be hosting the Hack Chat.

In this chat, we'll be discussing position sensors! If you have ever used a computer mouse, you have used a position sensor. The Fuse group is attempting to couple a low cost wireless position sensor with hand-held ultrasonic testing inspection units to make inspections faster, more accurate, and safer.

The Fuse group is looking to do a deep dive discussion on this subject, so we invited them to brainstorm and collaborate with the Hackaday community.

Solving this problem will significantly improve the speed and efficiency of inspections, and most importantly will make the inspection and inspector safer. Coupling a position sensor with the inspection probe will enable an inspector to more accurately locate defects after inspection.

Naveen Nair is the Technology Leader at Fuse. He got his Bachelors and Masters in Mechanical Engineering with a focus on Nondestructive Testing from the Indian Institute of Technology Madras. He did his Ph.D. in Electrical and Computer Engineering from Michigan State University. His research interests and experience spans the fields of Nondestructive Evaluation, Signal Processing, Inverse Problems and Computational Electromagnetics.

We'll be discussing:

  • Ins and outs of wireless position sensors
  • Challenges of building a position sensor from scratch
  • Complicated specifications to do with a sensor that detects linear position in x, y, and z directions with a linear resolution of 1mm x 1mm x 1mm

Here's the sheet to guide the discussion.

  • Design Slam Hack Chat Transcript

    Shulie Tornel07/07/2017 at 19:22 0 comments

    Amelia says: Looking to couple a low cost wireless position sensor with hand-held ultrasonic testing (UT) inspection units to make inspections faster, more accurate and safer.

    Position Sensor Specifications:

    -A wireless sensor unit (the beacon units, if any, may be wired, but wireless beacon units are preferred);

    -A sensor having coverage of, at a minimum 1meter x 1meter projected on to the surface of a pipe that can range in diameters from 1inch to 36inches;

    While 1meter x 1meter is a minimum requirement – any prediction/calculation of largest possible scan area without loss in resolution would be appreciated.

    -A sensor that detects linear position in x, y, and z directions with a linear resolution of 1mm x 1mm x 1mm and detects angular deflection in its plane from a nominal, pre-defined vertical line with an angular resolution of 10;

    -A system capable of being implemented on pipes with diameters ranging from 1inch to 36inches;

    You may choose to design for a nominal pipe diameter of 12 inches but the physics of the system should work for the entire range above. Specifically, the system must be trivially modifiable, in construction alone, to fit the entire range of pipe diameters.

    The system must be operable on pipes that are unsupported at heights of 1-30m above ground.

    Again, you may choose to design for a nominal height of 10m above ground. However, the physics of the proposed system should not be limited by the height of the pipe above ground.

    -The system should work on pipe surfaces that curve with a curve radii ranging from 1.5 to 2 times the OD of the pipe.

    A system that is modifiable for all clearances from 150mm to 600mm but may be designed for a nominal clearance of 300mm. This clearance is defined as the distance from the outer surface of the pipe to the nearest structure;

    -A sensor unit that is smaller than the probe unit (20mm by 50mm.);

    -A system that returns the position information via either a I2C bus (preferred, outputting the absolute position as a 4-count) or another connection with an update rate of not less than 50Hz;

    naveen.nai OK -- here is the bio... I am the Technology Leader at Fuse. I got my B/M Tech. from India and my Ph.D from Michigan State (go green) ...Prior to joining GE, I was a Research and Development Manager at Ansys Inc., I like to ride reining horses ...

    Amelia Sure @Sophi Kravitz ! Hello! I am a Community Manager of GE Fuse, an team within GE that works on specific product and technology challenges via open innovation/crowdsourcing. So every technology challenge we try to solve comes with prize money, potential partnerships, joint development opportunities, etc. (For personal background I come from a Chem Eng background, but have been hanging with people who build hardware, so I'm learning my way around.)

    naveen.nair +1 on Kalman filters ... I thought they could be put on chip ??? no ?

    Radomir Dopieralski isn't magdwick better?

    ctag @naveen.nair Sure, but the specific setup I was looking at literally didn't fit on the flash storage we had haha.

    Boian Mitov Well... I have Magdwick too in Visuino for that matter... ;-)

    Radomir Dopieralski


    Open source IMU and AHRS algorithms

    In 2009 Sebastian Madgwick developed an IMU and AHRS sensor fusion algorithm as part of his Ph.D research at the University of Bristol. The algorithm was posted on Google Code with IMU, AHRS and camera stabilisation application demo videos on YouTube. The algorithm received thousands of downloads but the code project was never maintained or updated.

    Read this on X-io >

    Radomir Dopieralski may come in handy

    Boian Mitov They seem to take few hundred bytes if I recall... based on the controller etc.

    Daniel S. GPS ICs run pretty intense kalmans but im sure they are implemented in hardware ;-)

    Daniel S. Always FPGAs...

    naveen.nair @Radomir Dopieralski --- thanks ! I did look at this (came on the same search for IMU registration algorithms ) ... but am not sure if this...

    Read more »

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