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<p>Yes Doug,</p>
<p>I have a couple of those sensors. The quotes in my post are from
the article itself, which I read. I was questioning whether the
author knows what he's talking about, that's all.</p>
<p>cheers!</p>
<p>dpa</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 4/25/22 4:07 PM, Doug Paradis wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOdUW+aom=uURStkQLbKfmCndRjMkALfSEtETg7pZyg=QQMh-g@mail.gmail.com">
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<p style="background-color: #f4eaa5;color: #000000
;margin:5px;padding: 2px;text-align: left !important;
align-content: center; display: block; border: 1px solid
#000000; font-size: large; font-family: sans-serif;"><strong><em
style="font-size: 11px;"> [EXTERNAL SENDER]</em></strong></p>
<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"
moz-do-not-send="true">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"
moz-do-not-send="true">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" moz-do-not-send="true">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" moz-do-not-send="true">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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