Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ROMAN JEAN FR
Original Assignee
ROMAN JEAN FR
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ROMAN JEAN FRfiledCriticalROMAN JEAN FR
Priority to FR7244650ApriorityCriticalpatent/FR2209153A1/fr
Publication of FR2209153A1publicationCriticalpatent/FR2209153A1/fr
G08G1/00—Traffic control systems for road vehicles
G08G1/01—Detecting movement of traffic to be counted or controlled
G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
G08G1/054—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed photographing overspeeding vehicles
G—PHYSICS
G01—MEASURING; TESTING
G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
G01P1/00—Details of instruments
G01P1/07—Indicating devices, e.g. for remote indication
G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
G01P1/106—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the time duration between two impulses with a reference time
G—PHYSICS
G01—MEASURING; TESTING
G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
G01P3/66—Devices characterised by the determination of the time taken to traverse a fixed distance using electric or magnetic means