[Dprglist] 2D TOF sensor array project

[David P. Anderson]

DPRG

"The Time-of-Flight (ToF) sensor measures the distance by calculating 
the time taken by a light pulse to travel from the source to the 
observed target and then return to the detector. The following formula 
calculates the flight time:

Distance value = Photon travel time/2 x the speed of light"

Is that really true?  Speed of light is about a foot per nanosec.   So 
measuring an object 10 feet away should take 20 nanosecs.   None of 
these TOF sensors have that sort of response. I thought they were 
measuring phase differences in a group of pulses, or something like 
that, and doing it over and over to get a reliable reading.

 From the article: "The timing budget is around 12mS per sensor ‘zone,’ 
which would equate to a total sweep time of approximately 160mS, giving 
a frame rate of a little more than 6 FPS."


dpa


On 4/25/22 3:13 PM, Doug Paradis via DPRGlist wrote:
>
> */[EXTERNAL SENDER]/*
>
> -All,
>     This might be of interest to you: 
> https://www.newark.com/how-to-implement-2d-lidar-using-time-of-flight-sensors 
> <https://www.newark.com/how-to-implement-2d-lidar-using-time-of-flight-sensors>
>
> Regards,
> Doug P.
>
> _______________________________________________
> DPRGlist mailing list
> DPRGlist at lists.dprg.org
> http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org
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