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hall sensor

Raja Sharma
Prodigy 90 points
Other Parts Discussed in Thread: DRV5056, DRV5055

which hall sensor should i used for pipeline inspection with MFL technology.

Actually currently i am using drv5056 but i am not sure that it will sense crack properly in pipeline.

please suggest any sensor.

thanks

raja sharma

tech x innovations.

  • 0
    TI__Mastermind 22135 points

    Hello Raja,

    Thank you for using the TI forum.  The type of magnetic sensor you need depends on the range of magnetic field you plan to see at the sensing location.  

    With this in mind, I have a couple questions:

    1) What magnetic field range (ie, strength in mT) do you plan to see at the sensing location?

    2) Do you need to sense field in both polarities, or do you only need unipolar devices (ie, both north and south, or only one of the two)?

  • 0 in reply to Mitch M
    TI__Mastermind 27715 points

    Hello Raja,

    It's been some time since your post. If you still need help, please reply back with answers to Mitch's questions so he can continue to assist you.

    Best regards,

    Ian Williams
    Applications Manager
    Current Sensing

  • 0 in reply to Mitch M
    Prodigy 90 points

    thank for your reply and sorry for late response, i was busy in some important work for this project.

     i am using two magnet(core magnetic field strength is 1.5 tesla) and at sensor position actually i am getting 100 mili tesla.  (not much accurate +-10mt) 

    i want answer from your side for crack detection which should i use bipolar or uni-polar. pleasecan u check some thing MFL technology (https://www.youtube.com/watch?v=aQJtHTfHVTU&t=141s), here is a video link.

    And which is best sensor for measuring as minimum magnetic flux leakage at that crack point.

    Regards 

    Raja Sharma

    tech x innovations 

  • 0 in reply to Raja Sharma
    TI__Mastermind 22135 points

    Hello Raja,

    Looking over the technology, it looks like you will need either unipolar or bipolar sensor based the direction you are sensing. Specifically, from an article I found on the subject (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4721765/, see Figure 3), if you are sensing the field perpendicular to the pipe, then you would need a bipolar sensor. If you are sensing parallel to the pipe, then you would need a unipolar sensor.

    If you choose to go with a uniploar sensor, I recommend the DRV5056.

    If you choose to go with a bipolar sensor, I recommend the DRV5055.

    Both of these sensors have options for different sensitivity ranges, but if you need to measure 100 mT, then you would want the A4 version of either device.