Automotive Sensing Systems & Radar Technology Overview
Explore the world of automotive sensing systems and radar technology including radar speed guns. Learn about the sensors used in cars for various applications such as radar cruise control, collision detection, and more. Discover the characteristics of these sensors and how they can be augmented or replaced by ultrasonic or LIDAR systems. Delve into the evolution of radar speed guns from K to Ka-band frequencies and their adaptation in measuring velocity. Access helpful links for further information and resources in this field.
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Presentation Transcript
Automotive Sensing Systems & Radar Speed Guns Logan Satterfield EECS 725 Investigation Presentation
Automotive Sensing Systems (That Use Radar) Radar Cruise Control / Forward Collison Assist Rear Pre-Crash Safety / Park Assist Blind Spot Monitoring / Lane Change Assist Note that these correspond to sensors on The front of a car The back of a car The sides of a car
Sensor Characterization These sensors are generally quite similar (or identical) and share some key characteristics FM-CW doppler radar 24GHz, 57-64GHz, or 76-81GHz center frequencies Operates in the undesirable ranges where atmospheric attenuation is relatively high & thus long-range interference is relatively unlikely (conjecture) <5 element TX & RX arrays Cheap $10 - $30 for name-brand (TI) single-chip solutions Even less for questionable quality knockoffs
Additional Sensors can be augmented or replaced by ultrasonic or LIDAR systems with similarly straightforward operational modes Sensors can be used for simple driver notifications, partial control of the vehicle, or even in full autonomous driving
Radar Speed Guns K to Ka-band (18-40 GHz) Formerly included X & Ku bands FM-CW doppler radar Simply reports the largest relative velocity First Used in 1948 Adaptation of aviation radar used to measure approach sink rate Largely phased out and replaced with LIDAR systems Narrower beam, faster acquisition, less detectable
Links https://web.archive.org/web/20160304105536/http://www-nrd.nhtsa.dot.gov/pdf/nrd-01/esv/esv20/07-0146-O.pdf https://transition.fcc.gov/oet/spectrum/table/fcctable.pdf https://www.ti.com/sensors/mmwave-radar/automotive/overview.html https://a.co/d/dEsT4tJ https://en.wikipedia.org/wiki/Extremely_high_frequency#/media/File:Micrwavattrp.png https://en.wikipedia.org/wiki/Radar_speed_gun#/media/File:Radar_gun.jpg https://en.wikipedia.org/wiki/Gunn_diode#/media/File:Radar_speed_gun_internal_works.jpg
