公开(公告)号：US20230039656A1

公开(公告)日：2023-02-09

申请号：US17873503

申请日：2022-07-26

Applicant: PALO ALTO RESEARCH CENTER INCORPORATED

Inventor： Jin Yan ,  Qiushu Chen ,  Ajay Raghavan ,  Peter Kiesel ,  Jingxiao Liu

IPC: G01L1/24 ,  G08G1/01 ,  G08G1/015

Abstract: A sensor network comprises at least one lateral optical fiber and at least one longitudinal optical fiber. The lateral fiber comprises optical sensors coupled to a pavement in a transverse orientation relative to a direction of vehicle travel along the pavement. The longitudinal fiber comprises optical sensors coupled to the pavement in a longitudinal orientation relative to the direction of vehicle travel. The optical sensors are 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 longitudinal fiber. A processor is 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. A transmitter is operatively coupled to the processor and configured to transmit the weight of vehicles to a predetermined location.

公开(公告)号：US11823567B2

公开(公告)日：2023-11-21

申请号：US17393986

申请日：2021-08-04

Applicant: Palo Alto Research Center Incorporated

Inventor： Hong Yu ,  Qiushu Chen ,  Peter Kiesel ,  Ajay Raghavan ,  Jin Yan ,  Kyle Arakaki

IPC: G08G1/01 ,  E01F11/00 ,  G01D5/353

CPC classification number: G08G1/0116 ,  E01F11/00 ,  G01D5/353

Abstract: A system includes a sensor network comprising at least two optical fibers coupled to a pavement. Each optical fiber includes one or more optical sensors installed a predetermined distance from one or more adjacent optical fibers. The one or more optical sensors are configured to produce a wavelength shift signal. A processor is configured to determine one or both of one or more attributes of one or more objects travelling on the pavement and a traffic condition of the pavement based on the wavelength shift signal. A transmitter is configured to transmit the one or more attributes to a predetermined location.

公开(公告)号：US11782231B2

公开(公告)日：2023-10-10

申请号：US17393927

申请日：2021-08-04

Applicant: Palo Alto Research Center Incorporated ,  Victorian Rail Track

Inventor： Ajay Raghavan ,  Peter Kiesel ,  Hong Yu ,  Kyle Arakaki ,  Qiushu Chen ,  Jin Yan ,  Colin Campbell

IPC: G01D5/353 ,  G02B6/50 ,  G08G1/04

CPC classification number: G02B6/508 ,  G01D5/35316 ,  G08G1/04

Abstract: One or more spacers for installing an optical cable are disposed in a trench that extends along an axis. The optical cable includes one or more optical sensors. Each spacer includes a base configured to rest in a bottom of the trench. A first arm extends from the base. The first arm is adjacent to a first wall of the trench. An opposing second arm extends from the base. The second arm is adjacent to an opposing second wall of the trench. The optical cable is configured to extend along the axis.

公开(公告)号：US20230039117A1

公开(公告)日：2023-02-09

申请号：US17393986

申请日：2021-08-04

Applicant: Palo Alto Research Center Incorporated

Inventor： Hong Yu ,  Qiushu Chen ,  Peter Kiesel ,  Ajay Raghavan ,  Jin Yan ,  Kyle Arakaki

IPC: G08G1/01 ,  G01D5/353 ,  E01F11/00

Abstract: A system includes a sensor network comprising at least two optical fibers coupled to a pavement. Each optical fiber includes one or more optical sensors installed a predetermined distance from one or more adjacent optical fibers. The one or more optical sensors are configured to produce a wavelength shift signal. A processor is configured to determine one or both of one or more attributes of one or more objects travelling on the pavement and a traffic condition of the pavement based on the wavelength shift signal. A transmitter is configured to transmit the one or more attributes to a predetermined location.

公开(公告)号：US20230038939A1

公开(公告)日：2023-02-09

申请号：US17393927

申请日：2021-08-04

Applicant: Palo Alto Research Center Incorporated ,  Victorian Rail Track

Inventor： Ajay Raghavan ,  Peter Kiesel ,  Hong Yu ,  Kyle Arakaki ,  Qiushu Chen ,  Jin Yan ,  Colin Campbell

IPC: G02B6/50 ,  G08G1/04 ,  G01D5/353

Abstract: One or more spacers for installing an optical cable are disposed in a trench that extends along an axis. The optical cable includes one or more optical sensors. Each spacer includes a base configured to rest in a bottom of the trench. A first arm extends from the base. The first arm is adjacent to a first wall of the trench. An opposing second arm extends from the base. The second arm is adjacent to an opposing second wall of the trench. The optical cable is configured to extend along the axis.