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Sensor for speedometer

Aman Chaturvedi
Prodigy 160 points
Other Parts Discussed in Thread: DRV5013

Hello,

I want to detect speed of a motorbike. Which hall effect sensor should I use?

  • 0
    TI__Mastermind 32395 points
    Hello Aman,

    This would ultimately come down to how fast the sensor's output would be changing. A latch sensor would be the easiest to implement where it's output would go high everytime the magnet pole would leave the area of the sensor and then come back to trigger its threshold magnetic field.

    How fast the output of the sensor changes is determined by how many magnetic poles there are in the motor (asssuming an electric motor) and how fast the motor is rotating. I would suggest looking through our Hall Effect Sensor Forum page which include training material and designs, specifically the "Speed-Controlled 24V Brushless DC Outrunner Motor Reference Design" which includes using a single DRV5013 hall-effect sensor to regulate the steady-state speed of a motor turning at 2055 rpm. In this application the DRV5013 output is changing at 171Hz and has a bandwidth of 30kHz.

    e2e.ti.com/.../355909
    www.ti.com/.../TIDA-00197

    Sincerely,
    Peter Iliya
    Current Sensing Applications
  • 0 in reply to Peter Iliya
    Prodigy 160 points
    Thanks for the reply.
    I want to place a magnet in tyre and then sense it through hall effect sensor. I want to sense speed upto 100 km/hr.