http://cartel.csail.mit.edu/ 2009-11-20T21:41:15-05:00 http://cartel.csail.mit.edu/ http://cartel.csail.mit.edu/lib/images/favicon.ico text/html 2009-11-10T19:31:06-05:00 http://cartel.csail.mit.edu/doku.php?id=cartel&rev=1257899466&do=diff Project Overview CarTel is a distributed, mobile sensor network and telematics system. Applications built on top of this system can collect, process, deliver, analyze, and visualize data from sensors located on mobile units such as automobiles and smartphones. In our deployment, a small embedded computer interfaces with a variety of sensors, processes the collected data, and delivers it to an Internet server. Applications running on the server analyze this data and provide interesting servic… text/html 2007-07-22T21:27:43-05:00 http://cartel.csail.mit.edu/doku.php?id=fleet_testbed&rev=1185154063&do=diff A CarTel-equipped car in the fleet testbed. ---------- Spatial coverage of the vehicles in the testbed. The red and yellow colors show extremely high activity, while green is lighter activity. Each vehicle runs usually runs for several hours every day, though some vehicles don't run on some days. text/html 2007-07-22T21:23:33-05:00 http://cartel.csail.mit.edu/doku.php?id=p2_pothole_patrol&rev=1185153813&do=diff The Pothole Patrol (P2) uses the opportunistic mobility of sensor-equipped vehicles to detect and report the surface conditions of roads. Each car in the system carries a CarTel node with 3-axis acceleration and GPS sensors, gathering location-tagged vibration data at a frequency of 400 Hz (we would've liked to use a higher sample rate, but the sensors we use max out at 400 samples per second). text/html 2007-07-20T16:10:47-05:00 http://cartel.csail.mit.edu/doku.php?id=portal_walkthrough&rev=1184962247&do=diff The portal shows users where they've recently driven. ---------- Each trip is organized into a trace, which when viewed allows access to all accompanying sensor data. ---------- Every once in a while, after a depressingly slow commute, you can see why on the portal. An average speed of 13 mph is enough to make one sick (or start biking). The red, orange, and yellow segments are slow; the greens are about average, and the blues are real fast (no blue below). text/html 2007-07-20T16:18:57-05:00 http://cartel.csail.mit.edu/doku.php?id=wi-fi_monitoring&rev=1184962737&do=diff We have used CarTel to monitor urban WiFi connectivity. In a 2006 paper, we report on the results of about 290 total ``drive hours'' from a few cars under typical driving conditions, in and around the Boston metropolitan area. The study was done over a 1-year duration.