<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[Collision Prevention doesn&#x27;t work]]></title><description><![CDATA[<p dir="auto">Hi, our team followed the <a href="https://docs.modalai.com/voxl-vision-px4-collision-prevention-0_9/" rel="nofollow ugc">VOA instructions</a> to try the important features needed in our projects and it appears "Collision Prevention" doesn't work like the video demonstrated and we still can get our Sentinel very close (around 2 inches) to walls or trees. The only thing possibly wrong is we don't get OBSTACLE_DISTANCE message in QGC. Otherwise, we can see all <code>stereo_front_pc</code>, <code>stereo_rear_pc</code> and <code>voa_pc_out</code> point clouds in <em>voxl-portal</em> with <em>voxl-dfs-server</em> running, <em>Health Check</em> and <em>voxl system check</em> in <em>voxl-portal</em> all passed and object detection enabled for different <em>Minimum Distance</em>s.<img src="/assets/uploads/files/1733252479139-screenshot-2024-12-03-at-2.01.13-pm.png" alt="Screenshot 2024-12-03 at 2.01.13 PM.png" class=" img-fluid img-markdown" /> and  CP_* parameters verified<img src="/assets/uploads/files/1733252795940-screenshot-2024-12-03-at-2.06.31-pm.png" alt="Screenshot 2024-12-03 at 2.06.31 PM.png" class=" img-fluid img-markdown" />:</p>
<p dir="auto">Any clue how to debug?</p>
]]></description><link>https://forum.modalai.com/topic/3993/collision-prevention-doesn-t-work</link><generator>RSS for Node</generator><lastBuildDate>Tue, 19 May 2026 22:32:07 GMT</lastBuildDate><atom:link href="https://forum.modalai.com/topic/3993.rss" rel="self" type="application/rss+xml"/><pubDate>Tue, 03 Dec 2024 19:15:06 GMT</pubDate><ttl>60</ttl></channel></rss>