Lighting system for tunnel or similar structures

Abstract

A lighting system for tunnels or similar works. The lighting system with LED diodes, including at least one lighting strip with LED diodes, with at least one set of LED diode modules, the modules of a set being divided up into subsets of one or more modules supplied with power by respective power supply buses, an electronic system supplying power to the strip, making it possible to power up, according to a first mode of operation, all the power supply buses and, in a second mode of operation, only a part of the power supply buses, so as to reduce the electrical consumption of the strip.

Claims

1. A lighting system with LEDs, comprising: at least one strip of lighting with LEDs, with at least one set of LED modules, the modules of a set being divided up into subsets of one or more modules supplied with power by respective power supply buses, wherein the strip comprises a quick connector to at least three conductors, including a common conductor and at least two conductors specific to respective subsets of modules, an electronic system for supplying power to the strip making it possible to power up, according to a first mode of operation, all the power supply buses and, in a second mode of operation, only a part of the power supply buses, so as to reduce the electrical consumption of the strip, the common conductor being linked to one pole of the electronic system for supplying power and the other conductors being, in said first mode of operation, all linked to the other pole of the electronic system for supplying power, at an output of a diode bridge, and the electronic system for supplying power being supplied with AC double-alternating rectified voltage.

2. The system as claimed in claim 1, wherein each set of modules comprises a module supplied with power by a respective power supply bus and at least one other module supplied with power by another power supply bus.

3. The system as claimed in claim 2, wherein the set of modules comprises one module supplied with power by a respective power supply bus and all the other modules of the set being supplied with power by one and the same other power supply bus.

4. The system as claimed in claim 2, wherein each set of modules comprises between 2 and 20 modules.

5. The system as claimed in claim 1, wherein each module comprises between 30 and 100 LEDs.

6. The system as claimed in claim 2, wherein the modules of a same set are disposed one after the other along the strip.

7. The system as claimed in claim 1, further comprising at least one human presence sensor, and a switch from the first mode of operation to the second and vice versa being made also according to whether or not a human presence is detected.

8. A lighting strip for the system as defined in claim 1, comprising: a flexible jacket, at least one set of LEDs disposed inside the flexible jacket, being repeated along the latter, the modules of a set being divided up into subsets of one or more modules supplied with power by N respective power supply buses, a connector having at least N−1 poles, making it possible to selectively power said buses.

9. A method for lighting a work in which the system as claimed in claim 1 is used, by simultaneously supplying power to all the modules from a mains to maximally light the work, and by supplying power to only a part of them in the case of a mains outage or when there is a lesser need for light.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Other features and advantages of the present invention will emerge on reading the following detailed description, of a nonlimiting exemplary embodiment thereof, and on studying the attached drawing, in which

(2) FIG. 1 schematically represents a lighting system according to the invention,

(3) FIG. 2 schematically represents in cross section the strip of FIG. 1,

(4) FIG. 3 illustrates a strip in which the modules correspond to respective rows of LED diodes, and

(5) FIG. 4 illustrates a strip in which the modules that are on in reduced lighting correspond to only certain rows of modules belonging to sets of modules which are repeated along the strip.

DETAILED DESCRIPTION

(6) FIG. 1 shows a lighting system 1 according to the invention, comprising a strip 10 intended to light a tunnel for example.

(7) The strip 10 comprises, as can be seen in FIG. 2, a flexible jacket 50, for example made of silicone, inside which is disposed a flexible printed circuit 51 bearing LED diodes 52.

(8) The LED diodes are arranged according to a succession of identical sets P1, P2, etc. Each set Pk of modules, with k an integer lying between 1 and the total number of sets of the strip, comprises at least two subsets of modules M1 and M2.

(9) In the example considered, the subset M1 comprises a single module 11 and the subset M2 comprises three modules 12, 13 and 14.

(10) All the modules 11 of the strip are supplied with power by the same power supply bus 20, 21. Thus, at the terminals of each of them, there is the same power supply voltage, for example approximately 200 V DC average voltage, when the voltage corresponds to the double alternation rectification of the 230 V AC mains, the invention not being limited to a particular power supply.

(11) All the other modules are supplied with power by another power supply bus 20, 22, the conductor 20 being common to both buses. Thus, each of the modules 12, 13 and 14 receives the same power supply voltage, for example approximately 200 V DC average voltage.

(12) The conductors 20, 21 and 22 are linked at one end by a plug connector 60 to an electronic power supply system 30 which is itself connected to the mains, for example 230 V AC as illustrated, but other mains voltages are possible, for example 110 V AC, or DC voltages such as 24 V DC.

(13) The strip 10 can have the same type of connector, male or female, at the other end, so as to allow several strips to be connected together one after the other.

(14) The electronic power supply system 30 is arranged to supply power respectively to one or more of the buses according to the mode of operation sought.

(15) In the example considered, in a first mode of operation, corresponding to maximal lighting, the power supply buses 20, 21 on the one hand, and 20, 22 on the other hand, are supplied with power, for example under the same double-alternating rectified DC voltage.

(16) The bus 20 is for example linked to the − and the buses 21 and 22 are linked to the +, at the output of a diode bridge used to produce the power supply DC voltage. All the modules 11 to 14 are on.

(17) The second mode of operation corresponds to the supply of power by a backup electrical source 40, comprising, for example, an electric battery and an associated inverter, if necessary.

(18) The switch to this second mode of operation takes place for example in network outage cases.

(19) The power supply system 30 is arranged to supply power only to the bus 20, 21 in this second mode of operation, such that only the modules 11 are on along the strip.

(20) The electrical consumption of the strip is then reduced, and the latter supplies minimal lighting.

(21) The power supply system 30 comprises, for example, an electromechanical relay which is supplied with power by the 230 V AC mains and which, when supplied with power, ensures the connection of all the buses 20, 21 and 22 to the rectifier bridge. In network outage cases, this relay switches to an idle state in which it ensures the connection of only the bus 20, 21 to the backup source 40.

(22) The power supply system 30 can then switch, in one exemplary implementation of the invention, to a mode of operation in which only the bus 20, 21 is supplied with power, but by the mains instead of the backup source.

(23) The switch to this mode of operation takes place for example in certain circumstances in which the mains is present but in which the need for lighting is lower, for example because of the absence of personnel on the site lit by the strip.

(24) The power supply system 30 can receive a control signal from a detector 80 which is sensitive to the presence of people within a given perimeter; if no person is detected, the system switches to reduced lighting; in case of human presence, it switches back to normal lighting mode.

(25) The dispositions of the modules on the strip can be different, and each module can correspond, for example, to a row of LED diodes, all the rows extending in parallel along the strip, as illustrated in FIG. 3.

(26) In this figure, the strip comprises a subset M1 of modules corresponding to a row of LED diodes extending over the entire length of the strip, the rest of the LED diodes forming a second subset M2 of modules. In reduced lighting, only the row corresponding to the subset M1 is on. When the lighting is maximal, all the rows are supplied with power.

(27) It is even possible to have, as illustrated in FIG. 4, a disposition of the LED diodes in the form of several rows, three for example, belonging to sets P1, P2, etc., which are repeated along the strip, the grouping of the LED diodes within the strip in the form of subsets of modules controlled by respective power supply buses being such that, in reduced lighting, only a part of the rows is on, and only over a part of the length of each set. In the example illustrated in FIG. 4, only the subset M1 within the sets P1, P2, etc. of modules which are repeated along the strip is on in reduced lighting.

(28) The number of modules within a set Pk of modules can also be different, as can the number of modules in each subset, the number of subsets, and the number of sets.