US 2015/0319825 A1Published application

Street lighting control, method, device and system

AssigneeUniversite De Liege

InventorsJacques DESTINE, Guy LEJEUNE

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Abstract

Method for controlling street lighting over a plurality of interconnected road segments, in which a road class is dynamically assigned to each road segment on the basis of, at least, stored road type data associated to each road segment and traffic parameters determined for each road segment for a current time period. At least a corresponding maximum lighting level is associated to each road class. In this method, signals comprising speed and direction of travel data of road users, and an identification of the road user are propagated through series of adjacent road segments starting from each road user's road segment, and a new lighting level equal to said maximum lighting level is set at each road segment whose distance to the road user's road segment is not greater than a first distance. A control device for implementing the above method is also disclosed.

Claims17

Dependent claims

A method for controlling street lighting over a plurality of interconnected road segments, comprising the steps of:

detecting speed and direction of travel of a road user on a road segment;
propagating a signal comprising speed and direction of travel data of the road user, and an identification of the road user's road segment, through a series of adjacent road segments starting from the road user's road segment;
dynamically assigning a road class and a corresponding maximum lighting level to each road segment, said road class representing photometric requirements based on visual needs of the road user in the road segment and said road class been selected on the basis of at least stored road type data associated to each road segment, and traffic parameters determined for each road segment for a current time period, said road type data comprising at least geometrical characteristics of road segment and an allowed speed limit, setting a new lighting level equal to said maximum lighting level at each road segment whose distance to the road user is not greater than a first distance;
and
comparing, for each road segment, said new lighting level with a current lighting level, and changing the current lighting level to the new lighting level if they are different;
wherein said distance is calculated on the basis of said speed and direction of travel of the road user.

3 more elements

A device for controlling street lighting on a road segment, wherein said device comprises a data processing unit with:

data storage for storing road type data of said road segment, said road type data comprising geometrical characteristics of the road and an allowed speed limit;
a first data input channel for receiving a signal comprising speed and direction of travel data of a road user on said road segment;
a second data input channel for receiving, from an adjacent road segment, a signal comprising speed and direction of travel data of a road user on said adjacent road segment or on another road segment connected to the control device's road segment over said adjacent road segment, and identification data of the road user's road segment;
a data output channel for transmitting, to an adjacent road segment, a signal comprising road user speed and direction of travel data received over said first and/or second data input channels, and identification data of the road user's road segment;
and
a control output channel for outputting a lighting command signal to a lighting unit;
said data processing unit being configured to:
dynamically assign a road class representing photometric requirements based on visual needs of the road user in the road segment, to the control device's road segment on the basis of, at least, said road type data and traffic parameters determined for this road segment for a current time period, said road class being associated with a corresponding maximum lighting level;
set a new lighting level equal to said maximum lighting level for the assigned road class upon reception of road user speed and direction of travel data over said first and/or second data input channels if a distance to the road user is not greater than a first distance calculated on the basis of a speed and direction of travel of the road user;
and
compare said new lighting level with a current lighting level of the lighting command signal, and change the current lighting level to the new lighting level if they are different.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/439,884Filed 6 Dec 2013
Priority: EP 12198770.520 Dec 2012
Published: 5 Nov 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H05B 47/175
Controlling the light source: by remote control
H05B 45/10
Circuit arrangements for operating light-emitting diodes [LED]: controlling the intensity of the light
H05B 47/11
In response to determined parameters: by determining the brightness or colour temperature of ambient light
H05B 47/115
In response to determined parameters: by determining the presence or movement of objects or living beings