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Looking for a Distance calculating Sensor

Firefox59021
Associate II

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. 

1 ACCEPTED SOLUTION

Accepted Solutions

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

 


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View solution in original post

7 REPLIES 7
John E KVAM
ST Employee

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


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.

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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 ??

 

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'

 Thank you for the suggetions but the link cannot be accessed.

Firefox59021
Associate II

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  )

Can you please retry with this one :

Time-of-Flight sensors - Products (st.com)

If the link is not working you can find it here from the st.com page :

AnneBIGOT_0-1691573174311.png

 


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'

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'