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Medical Position Sensor

Tim Peach
Prodigy 20 points
Other Parts Discussed in Thread: OPT3101, OPT3101EVM

Hi,

I am in search of sensors that can communicate with one another and send their relative positions to a device such as a tablet. These sensors need to be a maximum size of 15mm x 15mm and need to be accurate within 1mm.

The sensors ipad will use the concept of triangulation in order to determine the relative positions of two sensors relative to one sensor.

Do you possibly have a product like this?

  • 0
    TI__Guru**** 169754 points

    Hi,

    The closest that Bluetooth has for distance measurement is the AoA or Angle of Attack. However, the stringent requirement of 1mm is a very tall order for this system. I would imagine that Laser, radar or ultrasound would potentially reach this. 

    I will redirect this post to the Sensors forum as they may have a solution closer to what you are looking for. 

    Regards,

    Rafael

  • 0 in reply to desouza
    TI__Mastermind 25855 points

    Hi Tim,

    I support our optical sensors. OPT3101 can achieve accuracy of a few mm and size may also be slightly larger than what you are looking for. You can take a look at the OPT3101EVM. Our sensors will not communicate wirelessly but you should be able to add that functionality to your system. As Rafael mentioned you may want to post specifically about ultrasound and radar as well to see how those compare.

    Best,

    Alex

  • 0 in reply to Alex Bhandari-Young
    Prodigy 20 points

    Hi Alex,

    Thanks, but the problem is that you won't have a clear line of sight. There will be some material, in the way. Do you have any experience on Positional Magnetometers as I found that this might be a possible solution? A magneto sensor can be placed at one position and then measure the position of a magnet, which will then serve as the second sensor.

    Best,

    Tim

  • 0 in reply to Tim Peach
    TI__Expert 7599 points

    Tim,

    We do have Hall sensors at TI with integrated sensors inside the chip and can measure the magnetic field using a magnet. 

    Can you place 2 magnets on each plate and place 2 Hall sensors ? You will read back the data on each sensor that can measure relative distance from the target.