{"id":1218,"date":"2014-08-21T01:00:53","date_gmt":"2014-08-21T08:00:53","guid":{"rendered":"http:\/\/192.168.3.4\/?p=1218"},"modified":"2018-01-09T06:49:36","modified_gmt":"2018-01-09T14:49:36","slug":"sensor-helmet-video-systems","status":"publish","type":"post","link":"https:\/\/www.cloudacm.com\/?p=1218","title":{"rendered":"Sensor Helmet Video Systems"},"content":{"rendered":"<p><strong>Close, but no cigar&#8230;<\/strong><\/p>\n<p>I decided to purchase wide angle lenses for the 808-16 camera in large part to size restraints. \u00a0I realized\u00a0that installing an external lens was going to end up making the whole thing look like trash. \u00a0Last week, the wide angle lenses arrived. \u00a0This <a href=\"http:\/\/www.armadale.org.uk\/808dinfraredconversion.htm\" target=\"_blank\">post provided the details<\/a> on how to convert the lens. \u00a0This is much cleaner than the modification I did to the stock lens. \u00a0I used an\u00a0X-Acto tool to remove the thread lock. \u00a0Once out, I could see the filter. \u00a0I sliced at the four corners and had no trouble prying out the filter. \u00a0I did have some trouble removing the lens from the sensor at first. \u00a0The forward lens cap came loose, instead of the entire lens assembly. \u00a0By the time I realized it, a small lens popped out onto my work bench. \u00a0Luckily, the bench was clear and I spotted it.<\/p>\n<p>I knew I would have to re-focus the camera, so I used AMCap to stream video from the camera to my computer. \u00a0I wanted to block out visible light, so I used a cut piece of floppy disk media. \u00a0Once cut to size, I installed this into the forward portion of the lens assembly. \u00a0After some adjustments to focus, it was ready for use.<br \/>\n<iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/g3tgpx8fVec\" width=\"240\" height=\"135\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>I thought this was the last item remaining for the sensor helmet, so I started work on heat sinks for the processing boards. \u00a0The Mobius camera uses a more intense processor to handle the 1080p video. \u00a0From what I could gather on the data sheet, the processor handles functions that most folks take for granted. \u00a0The raw image sensor data is noisy, blurry, and shaky. \u00a0All of these problems are dealt with by the processor. \u00a0A consequence is the processor runs hot and the <a href=\"http:\/\/dashcamtalk.com\/forum\/threads\/mobius-thermal-tests.3423\/page-2\" target=\"_blank\">stock Mobius has a heat sink built<\/a> into the housing.<\/p>\n<p>Since the housing is going to be removed to allow the process boards to be directly mounted in the helmet, I had a problem to work out. \u00a0I found thermal conductive epoxy that I could use to glue square pieces of copper to the processing chips. \u00a0I used a cut piece of \u00a03\/4 inch copper pipe for the material. \u00a0Once that piece was cut, I sliced along the flat portion of the copper pipe with a grinder. \u00a0 Then I took a ball peen hammer and flattened out the copper. \u00a0Next, I used diagonal pliers and cut the square portions out. \u00a0Then I smoothed out the edges with a file. \u00a0With all the pieces cut and ready, I mixed the epoxy and set the new heat sinks on the processing chips.<\/p>\n<p>After a day of curing, I figured I better run a bench test to make sure it handles the heat. \u00a0This is when I realized I didn&#8217;t have all my parts. \u00a0The video extension cable I had only worked with the 808-16 camera. \u00a0The Mobius camera had an additional 3 pins, so I went online and ordered it. \u00a0It might be here by the end of September&#8230;bummer.<\/p>\n<p>Anyway, I went ahead and did the bench test. \u00a0I didn&#8217;t have a precise way to measure how well it worked, so I did it ad-hoc by touching the heat sink. \u00a0Both the 808-16 and Mobius ran fine for 30 minutes of steady recording. \u00a0My guess is the copper didn&#8217;t get hotter than 140 degree F. \u00a0The video was good, with no signs of discoloration or dropped frames, I noticed this with my 808-26 due to over heating. \u00a0Good to go.<\/p>\n<p>Until the data cable arrives for the Mobius lens, the rest of the visual portion of the sensor helmet is on hold. \u00a0I&#8217;ll need to center the FOV of both lenses before I fix them inside the helmet. \u00a0I&#8217;ll be using a laser pointer to center them, once the last item arrives.<\/p>\n<p>In the meanwhile, I can get started on the sensor and micro controller installation, as well as build the power pack. \u00a0Until next time&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Close, but no cigar&#8230; I decided to purchase wide angle lenses for the 808-16 camera in large part to size restraints. \u00a0I realized\u00a0that installing an external lens was going to end up making the whole thing look like trash. \u00a0Last week, the wide angle lenses arrived. \u00a0This post provided the details on how to convert the lens. \u00a0This is much cleaner than the modification I did to the stock lens. \u00a0I used an\u00a0X-Acto tool to remove the thread lock. \u00a0Once&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"https:\/\/www.cloudacm.com\/?p=1218\"> Read More<span class=\"screen-reader-text\">  Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,3],"tags":[],"class_list":["post-1218","post","type-post","status-publish","format-standard","hentry","category-arduino","category-rd"],"_links":{"self":[{"href":"https:\/\/www.cloudacm.com\/index.php?rest_route=\/wp\/v2\/posts\/1218","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cloudacm.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cloudacm.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cloudacm.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cloudacm.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1218"}],"version-history":[{"count":5,"href":"https:\/\/www.cloudacm.com\/index.php?rest_route=\/wp\/v2\/posts\/1218\/revisions"}],"predecessor-version":[{"id":2223,"href":"https:\/\/www.cloudacm.com\/index.php?rest_route=\/wp\/v2\/posts\/1218\/revisions\/2223"}],"wp:attachment":[{"href":"https:\/\/www.cloudacm.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cloudacm.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cloudacm.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}