US 12,352,643 B2
Traffic monitoring using optical sensors
Jin Yan, Palo Alto, CA (US); Qiushu Chen, San Jose, CA (US); Ajay Raghavan, Mountain View, CA (US); Peter Kiesel, Palo Alto, CA (US); and Jingxiao Liu, Palo Alto, CA (US)
Assigned to Xerox Corporation, Norwalk, CT (US)
Filed by PALO ALTO RESEARCH CENTER INCORPORATED, Palo Alto, CA (US)
Filed on Jul. 26, 2022, as Appl. No. 17/873,503.
Application 17/873,503 is a continuation in part of application No. 17/393,986, filed on Aug. 4, 2021, granted, now 11,823,567.
Prior Publication US 2023/0039656 A1, Feb. 9, 2023
Int. Cl. G08G 1/015 (2006.01); G01L 1/24 (2006.01); G08G 1/01 (2006.01)
CPC G01L 1/243 (2013.01) [G08G 1/0125 (2013.01); G08G 1/015 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A system, comprising:
a sensor network comprising:
at least one lateral fiber comprising optical sensors coupled to a pavement in a transverse orientation relative to a direction of vehicle travel along the pavement;
at least one longitudinal fiber comprising optical sensors coupled to the pavement in a longitudinal orientation relative to the direction of vehicle travel;
the optical sensors configured to produce wavelength shift signals comprising one or more lateral strain signals associated with the lateral fiber and one or more tangential strain signals associated with the at least one longitudinal fiber;
a processor operatively coupled to the sensor network and configured to determine a weight of vehicles moving along the pavement based on the lateral and tangential strain signals; and
a transmitter operatively coupled to the processor and configured to transmit the weight of vehicles to a predetermined location.