<div dir="ltr">David,<div> As you mentioned the FRS is ~6 per the article. Several people have expressed interest in the STI <span style="color:rgb(51,51,51);font-family:Helvetica,Arial,"Segoe UI",sans-serif">VL53L1X type of sensor and this project shows how to make a 180 deg array using 9 of them and a Nuecleo board. The code can be found in the STI app note at </span><a href="https://www.st.com/en/embedded-software/stsw-img017.html">https://www.st.com/en/embedded-software/stsw-img017.html</a>. This would be a leg up for any one considering this type of sensor. How the VL53L1x sensors work can be found at <a href="https://community.element14.com/learn/learning-center/essentials/w/documents/5037/time-of-flight-sensors?ICID=I-CT-LP-TC-0000515-2D_LIDAR-LEARN_MORE_TOF-NOV21-WF2601054">https://community.element14.com/learn/learning-center/essentials/w/documents/5037/time-of-flight-sensors?ICID=I-CT-LP-TC-0000515-2D_LIDAR-LEARN_MORE_TOF-NOV21-WF2601054</a> . You may need to have an e14 account. </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 25, 2022 at 3:34 PM David P. Anderson via DPRGlist <<a href="mailto:dprglist@lists.dprg.org">dprglist@lists.dprg.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>DPRG<br>
</p>
<p> "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: </p>
<p> Distance value = Photon travel time/2 x the speed of light"</p>
<p>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. <br>
</p>
<p>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."</p>
<p><br>
</p>
<p>dpa</p>
<p><br>
</p>
<div>On 4/25/22 3:13 PM, Doug Paradis via
DPRGlist wrote:<br>
</div>
<blockquote type="cite">
<p style="background-color:rgb(244,234,165);color:rgb(0,0,0);margin:5px;padding:2px;display:block;border:1px solid rgb(0,0,0);font-size:large;font-family:sans-serif;text-align:left"><strong><em style="font-size:11px"> [EXTERNAL SENDER]</em></strong></p>
<div dir="ltr">-All,
<div> This might be of interest to you: <a href="https://www.newark.com/how-to-implement-2d-lidar-using-time-of-flight-sensors" target="_blank">https://www.newark.com/how-to-implement-2d-lidar-using-time-of-flight-sensors</a></div>
<div><br>
</div>
<div>Regards,</div>
<div>Doug P.</div>
</div>
<br>
<fieldset></fieldset>
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