{"id":7124,"date":"2023-10-10T07:31:15","date_gmt":"2023-10-10T05:31:15","guid":{"rendered":"https:\/\/www.acconeer.com\/?post_type=innovation_lab&#038;p=7124"},"modified":"2024-03-18T04:01:33","modified_gmt":"2024-03-18T02:01:33","slug":"speed-measurement","status":"publish","type":"innovation_lab","link":"https:\/\/acconeer.com\/sv\/innovation_lab\/speed-measurement\/","title":{"rendered":"Speed measurement"},"content":{"rendered":"\n<p>In this Innovation Lab post, you will learn how to implement speed measurement using the A121 Pulsed Coherent Radar sensor. For example, the speed of cars and time gaps between each car can be tracked to monitor traffic but also the speed of small objects such as golf, tennis or soccer balls.<\/p>\n\n\n\n<p>More information about the algorithm can be found on <a href=\"https:\/\/docs.acconeer.com\/en\/latest\/exploration_tool\/algo\/a121\/detectors\/speed_detection.html\" target=\"_blank\" rel=\"noopener\">the Acconeer document site.<\/a><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Speed measurement with Acconeer A121 60GHz radar sensor\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Gx5k9NdP1oI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">HARDWARE<\/h2>\n\n\n\n<p>One XE121 Evaluation Board and one XC120 Connector Board are necessary for this implementation.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\r\n \t<li>XE121 Evaluation Board can be purchased from <a href=\"https:\/\/www.digikey.se\/en\/products\/detail\/acconeer-ab\/XE121\/16582348\" target=\"_blank\" rel=\"noopener\">DigiKey<\/a><\/li>\r\n \t<li>XC120 Connector Board can be purchased from <a href=\"https:\/\/www.digikey.se\/en\/products\/detail\/acconeer-ab\/XC120\/16582340\" target=\"_blank\" rel=\"noopener\">DigiKey<\/a><\/li>\r\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">SOFTWARE<\/h2>\n\n\n\n<p>To get started with the Evaluation kit and the Exploration tool, go to <a href=\"https:\/\/docs.acconeer.com\/en\/latest\/exploration_tool\/installation_and_setup.html\" target=\"_blank\" rel=\"noopener\">the Acconeer documentation<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">EXPLORATION TOOL<\/h2>\n\n\n\n<p>In the Exploration Tool, click \u201cSpeed detector\u201d on the left-side menu, then adjust the distance to the approximate distance that you wish to measure speed at. This might require some adjustment to get an optimal measurement. If the range includes multiple distances, you will get a speed for each distance measured.<\/p>\n\n\n\n<p>To start measuring, click \u201cStart measurement\u201d on the right-side menu. The speed is shown at \u201cSpeed history\u201d on the Exploration tool, and the sign of the value tells whether the object is moving towards or away from the sensor (negative values means movement towards the sensor, and positive means away from the sensor). Note that only the movement component perpendicular to the sensor is measured, so when measuring at an angle, this needs to be taken into consideration.<\/p>\n\n\n\n<p>On the Frequency data section, the power spectral density (PSD) of the signal is shown. The PSD of the signal describes the power present in the signal as a function of frequency. If the amplitude of the PSD goes above a threshold, it will be interpreted as a speed and displayed in the output. The threshold value is relative the the median of the PSD. So a threshold of 10 means that we need an amplitude of 10 times the median of the entire PSD to consider a speed. Lowering the threshold will mean that less reflective objects will start to affect the measurement as well.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"985\" src=\"https:\/\/acconeer.com\/wp-content\/uploads\/2023\/10\/speed_-measurement_exploration_tool-1.png\" alt=\"\" class=\"wp-image-7323\" srcset=\"\/wp-content\/uploads\/2023\/10\/speed_-measurement_exploration_tool-1.png 1920w, \/wp-content\/uploads\/2023\/10\/speed_-measurement_exploration_tool-1-512x263.png 512w, \/wp-content\/uploads\/2023\/10\/speed_-measurement_exploration_tool-1-1024x525.png 1024w, \/wp-content\/uploads\/2023\/10\/speed_-measurement_exploration_tool-1-768x394.png 768w, \/wp-content\/uploads\/2023\/10\/speed_-measurement_exploration_tool-1-1536x788.png 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">TRY IT ON YOUR OWN AND GET IN TOUCH<\/h3>\n\n\n\n<p>If you try this, or work on something else, we\u2019d love to hear about your project! Please get in touch with us on <a href=\"mailto:innovation@acconeer.com\">innovation@acconeer.com<\/a>.<\/p>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.67%\">\n\n<h2 class=\"has-text-align-center wp-block-heading\">NEW A121 EVALUATION KIT<\/h2>\n\n<\/div>\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n\n<p><a href=\"https:\/\/acconeer.com\/products\/#XE121\">BUY HERE<\/a><\/p>\n\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>The speed of cars and small objects can be measured using the A121 Pulsed Coherent Radar sensor.<\/p>\n","protected":false},"featured_media":7337,"template":"","class_list":["post-7124","innovation_lab","type-innovation_lab","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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