{"id":2273,"date":"2010-12-01T18:22:20","date_gmt":"2010-12-01T23:22:20","guid":{"rendered":"http:\/\/sciencebusiness.technewslit.com\/?p=2273"},"modified":"2010-12-01T18:22:20","modified_gmt":"2010-12-01T23:22:20","slug":"radar-in-shoes-can-step-in-when-gps-fails","status":"publish","type":"post","link":"https:\/\/technewslit.com\/sciencebusiness\/?p=2273","title":{"rendered":"Radar in Shoes Can Step In When GPS Fails"},"content":{"rendered":"
\"GPS<\/a>
(GPS.gov)<\/figcaption><\/figure>\n

A global positioning system (GPS) is handy if you’re in a location where the device can access the positioning satellite, but at other times, such as in a building or underground, it doesn’t do much good. An engineering team at North Carolina State University (NCSU) in Raleigh and Carnegie Mellon University (CMU) in Pittsburgh, Pennsylvania has developed a prototype<\/a> solution for those times when the satellite and GPS device are not in contact.<\/p>\n

That solution is a form of radar built into a person’s shoe. The radar has a sensor that tracks the distance between the heel of the shoe and the ground. It indicates if the individual is moving or standing still.<\/p>\n

By itself, the shoe sensor would not tell much about a person’s location, but it fills a gap encountered by inertial measurement units (IMUs) that aim to step in when a GPS loses contact with satellites. IMUs are electronic devices that measure the forces created by acceleration and deceleration to determine how quickly people move and how far. IMU technology tracks a person’s movement after losing a GPS signal and provides location data based on someone’s last known position from the GPS.<\/p>\n

IMUs often have problems, however, determining when someone is moving or standing still, and getting that part wrong throws off the IMU’s entire calculations. The trick is determining independently when a person is stationary. That’s the function of the shoe sensor: it tells when someone is standing still for a period of time, taking a brief pause between steps, or continuously moving.<\/p>\n

The shoe radar uses the stationary\/moving indicator in the sensor to adjust the IMU data showing movement — acceleration or deceleration — and combines that calculation with the last known position given by the GPS to determine an individual’s location. The team reports promising early results with the device.<\/p>\n

The NCSU\/CMU team published its findings in the October 2010 issue of IEEE Transactions On Microwave Theory And Techniques<\/em><\/a>. The research was funded by grants from Air Force Research Laboratory and the Defense Advanced Research Projects Agency.<\/p>\n

*\u00a0\u00a0\u00a0\u00a0 *\u00a0\u00a0\u00a0\u00a0 *<\/p>\n","protected":false},"excerpt":{"rendered":"

A global positioning system (GPS) is handy if you’re in a location where the device can access the positioning satellite, but at other times, such as in a building or underground, it doesn’t do much good. An engineering team at North Carolina State University (NCSU) in Raleigh and Carnegie Mellon University (CMU) in Pittsburgh, Pennsylvania […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[88,86,105,26],"class_list":["post-2273","post","type-post","status-publish","format-standard","hentry","category-products","tag-dod","tag-engineering","tag-physical-sciences","tag-university"],"_links":{"self":[{"href":"https:\/\/technewslit.com\/sciencebusiness\/index.php?rest_route=\/wp\/v2\/posts\/2273","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/technewslit.com\/sciencebusiness\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/technewslit.com\/sciencebusiness\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/technewslit.com\/sciencebusiness\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/technewslit.com\/sciencebusiness\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2273"}],"version-history":[{"count":2,"href":"https:\/\/technewslit.com\/sciencebusiness\/index.php?rest_route=\/wp\/v2\/posts\/2273\/revisions"}],"predecessor-version":[{"id":2276,"href":"https:\/\/technewslit.com\/sciencebusiness\/index.php?rest_route=\/wp\/v2\/posts\/2273\/revisions\/2276"}],"wp:attachment":[{"href":"https:\/\/technewslit.com\/sciencebusiness\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2273"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/technewslit.com\/sciencebusiness\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2273"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/technewslit.com\/sciencebusiness\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}