{"id":861,"date":"2014-08-09T18:47:25","date_gmt":"2014-08-09T22:47:25","guid":{"rendered":"http:\/\/fll-freak.com\/blog\/?p=861"},"modified":"2025-04-21T00:54:35","modified_gmt":"2025-04-21T04:54:35","slug":"data-collection-1-of-n","status":"publish","type":"post","link":"https:\/\/fll-freak.com\/blog\/?p=861","title":{"rendered":"Data collection. 1 of n"},"content":{"rendered":"<p>Today I took my robot to my test area. I collected two battery packs worth of data. I am now begging the long process of analyzing 15 megabytes of binary log files. Oh Joy! No sarcasm here. I love data.<\/p>\n<p>So the first thing I did was to take one run of 2400 samples and plot the speed provided by the GPS and that I compute from the encoder. Here I was a bit worried that I got all the math right with gear ratios and wheel diameters. But as you can see, I was pretty much spot on.<\/p>\n<p>One thing to notice is that the encoder speed is actually much more accurate at slow speeds and particularly at a dead stop. The GPS is never content to say it is not moving but the encoder is.<\/p>\n<p><a href=\"http:\/\/fll-freak.com\/blog\/wp-content\/uploads\/2014\/08\/Speeds.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-862\" src=\"http:\/\/fll-freak.com\/blog\/wp-content\/uploads\/2014\/08\/Speeds-300x243.jpg\" alt=\"Speeds\" width=\"300\" height=\"243\" srcset=\"https:\/\/fll-freak.com\/blog\/wp-content\/uploads\/2014\/08\/Speeds-300x243.jpg 300w, https:\/\/fll-freak.com\/blog\/wp-content\/uploads\/2014\/08\/Speeds.jpg 791w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>More data later!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Today I took my robot to my test area. I collected two battery packs worth of data. I am now begging the long process of analyzing 15 megabytes of binary log files. Oh Joy! No sarcasm here. I love data. &hellip; <a href=\"https:\/\/fll-freak.com\/blog\/?p=861\">Continue reading <span class=\"meta-nav\">&rarr;<\/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":[24],"tags":[],"class_list":["post-861","post","type-post","status-publish","format-standard","hentry","category-avc"],"_links":{"self":[{"href":"https:\/\/fll-freak.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/861","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fll-freak.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fll-freak.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fll-freak.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fll-freak.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=861"}],"version-history":[{"count":2,"href":"https:\/\/fll-freak.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/861\/revisions"}],"predecessor-version":[{"id":864,"href":"https:\/\/fll-freak.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/861\/revisions\/864"}],"wp:attachment":[{"href":"https:\/\/fll-freak.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=861"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fll-freak.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=861"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fll-freak.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=861"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}