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Firefox59021
Associate
July 11, 2023
Solved

Looking for a Distance calculating Sensor

  • July 11, 2023
  • 2 replies
  • 2330 views

Hi ,we are looking for a distance sensor that meets the below requirements
1.Working distance 5mm to 200mm
2. Resolution steps: 0.01mm steps

 what is the minimum resolution steps your sensor can provide. Let me know if you need anything else. 

This topic has been closed for replies.
Best answer by Anne BIGOT

Hello,

You can find the list of ST ToF sensors here.

From a technical side, it is possible but we don't have such accuracy sensors.

Regards

 

2 replies

John E KVAM
John E KVAM
ST Employee
July 12, 2023

The holy grail of the Time of Flight distance sensors is sub-millimeter resolution. I suppose it's possible, but it would be so expensive you wouldn't want to pay for it.

The basic problem is light runs at 6.66 pico second per mm - round trip. And a peco second is one millionth of one millionth of a second. Computers and circuts are fast, but they are NOT that fast. 

The ToF sensors report distances in MM, but one has to assume a +/- 3% accuracy.

At the lowest level the sensor has to use statisitcs to get an answer. Light is just too fast to measure the distace directly.

- john

    F
    Firefox59021Author
    Associate
    July 13, 2023

    HI john thank you for the response 

    1.can you list some of the  ToF sensors and other poisitioning sensors if possible 

    2.only the sensor price costs high or the whole module ??

     

    Anne BIGOT
    Anne BIGOTBest answer
    Technical Moderator
    July 28, 2023

    Hello,

    You can find the list of ST ToF sensors here.

    From a technical side, it is possible but we don't have such accuracy sensors.

    Regards

     

    Our community relies on fruitful exchanges and good quality content. You can thank and reward helpful and positive contributions by marking them as 'Accept as Solution'. When marking a solution, make sure it answers your original question or issue that you raised. ST Employees that act as moderators have the right to accept the solution, judging by their expertise. This helps other community members identify useful discussions and refrain from raising the same question. If you notice any false behavior or abuse of the action, do not hesitate to 'Report Inappropriate Content'
      F
      Firefox59021Author
      Associate
      August 9, 2023

      image.png

      can you suggest any sensor for this ??

      1. the base moves forward and laternal movements 

      2.sensor to track the movement of joystick (how miuch it is deviated from initial position  )

      Anne BIGOT
      Anne BIGOT
      Technical Moderator
      August 9, 2023

      The best sensor could be L4CD so far, but you won't get the resolution step of 0.01mm

      Our community relies on fruitful exchanges and good quality content. You can thank and reward helpful and positive contributions by marking them as 'Accept as Solution'. When marking a solution, make sure it answers your original question or issue that you raised. ST Employees that act as moderators have the right to accept the solution, judging by their expertise. This helps other community members identify useful discussions and refrain from raising the same question. If you notice any false behavior or abuse of the action, do not hesitate to 'Report Inappropriate Content'
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