WO2014124999A2

WO2014124999A2 - Lamp enabling a remote device to define an energy budget

Info

Publication number: WO2014124999A2
Application number: PCT/EP2014/052775
Authority: WO
Inventors: Eric Deblonde
Original assignee: Oya Light
Priority date: 2013-02-13
Filing date: 2014-02-13
Publication date: 2014-08-21
Also published as: FR3002107A1; WO2014124999A3; FR3002107B1

Abstract

A lamp (102) comprises a lighting system (123) intended to be powered by a supply signal provided by a remote device (101) and an electronic card (130). The electronic card (130) comprises: at least one interface (121), designed to enable the electronic card to exchange data with the remote device, in particular in the context of defining an energy budget, and to receive the supply signal from the remote device; means (124) for estimating an energy requirement of the lighting system; and means (124; 126) for providing an indication, via at least one said interface, of a total energy requirement, based on the estimated energy requirement of the lighting system.

Description

Luminaire allowing a remote device to define an energy budget

The present invention relates to a luminaire comprising an electronic card to allow to define an energy budget granted to the luminaire by a remote power supply supplier.

There are technologies that allow devices to communicate via a cable and that allow one of these devices to electrically power another of these devices via the same cable. For example, the IEEE 802.3at standard or the IEEE 802.3af standard, also known as "Power Over Ethernet" standards. Such technologies combining communication and power on the same cable allow a device powered by another device to tell the other device to which class it belongs, that is to say what energy budget it requires from this other device. This declaration is made at the initialization of the connection between the two devices, which allows the power supply device to manage the power distribution among a set of devices to power, for example by performing the load balance.

Such technologies are applicable to the field of luminaires. An electronic card can then be integrated into the luminaire to do this. This arrangement has the advantage of simplifying the wiring of the luminaire, and when the luminaire includes a lighting system based on light-emitting diodes, it makes it possible to avoid strong currents and thus avoid using an electrician to install the luminaire . A disadvantage of such an arrangement is that the class declared at the initialization of the connection by the luminaire to the equipment supplying power is fixed. However, in the case of luminaires, it is desirable to allow variations in luminous intensity over the use of the luminaires, for example according to the hours of a day. This characteristic results in the class declared by the luminaire being oversized compared to the actual energy needs of the luminaire. The equipment supplying the power then grants an energy budget to the luminaire greater than the needs, which leads to a sub-optimal management of the supply capacity of said equipment. This phenomenon is further amplified when the deployed lighting infrastructure supports additional services requiring the implementation of dedicated peripherals, energy consumers, integrated in the luminaire or connected and powered by the luminaire.

It is desirable to overcome these various disadvantages of the state of the art.

In particular, it is desirable to provide a solution that makes it possible to improve the management of the energy budget of the equipment supplying power to the luminaire. It is furthermore desirable to provide a solution that will improve this energy budget management when the deployed lighting infrastructure supports additional services requiring the implementation of dedicated, energy-consuming peripherals integrated into the energy budget. fixture or connected and powered by the luminaire.

The invention relates to a luminaire comprising an illumination system intended to be powered by a supply signal supplied by a remote device. The luminaire is such that it comprises an electronic card comprising: at least one interface, adapted (s) to allow the electronic card to exchange data with the remote equipment in particular within the framework of a definition of a budget energy and receive the power signal from the remote equipment; means for estimating an energy requirement of the lighting system; and means for providing an indication, via at least one said interface, of a total energy requirement, based on the estimated energy requirement of the lighting system. Thus, the declaration of the energy needs of the luminaire is adapted to the needs real energy of the luminaire and the management of the energy budget of the remote equipment is thus improved.

According to a particular embodiment, the electronic card further comprises: at least one input-output intended to connect at least one peripheral; and means for estimating an energy requirement of the peripheral device (s) via the respective input-output (s). The luminaire is further such that the means for providing an indication of the total energy requirement are adapted to indicate the total energy requirement further based on the energy requirement of the peripheral (s). Thus, when the deployed lighting infrastructure supports additional services requiring the implementation of energy-consuming peripherals, the management of the energy budget of the remote equipment is improved.

According to a particular embodiment, the electronic card comprises means for receiving, via a said input-output, data from at least one said device. The luminaire is further such that the electronic card comprises means for transmitting, via an said interface, the received data. Thus, the remote equipment can take into account data supplied to the luminaire by sensors to define the energy budget.

According to a particular embodiment, the electronic card comprises means for receiving, via a said input-output, data from at least one said device. The luminaire is further such that the means for providing an indication of the total energy requirement are adapted to indicate the total energy requirement on the basis additionally of the received data. Thus, additional savings in terms of energy budget are realized.

According to a particular embodiment, the electronic card comprises means for receiving, via a said input-output, an indication of the brightness level of an area to be illuminated by said luminaire. The method is further such that the means for estimating the energy requirement of the lighting system are adapted to estimate the energy requirement of the lighting system according to the brightness level indication. Thus, additional savings in terms of energy budget are realized.

According to a particular embodiment, the means for providing an indication of the total energy requirement comprise means for transmitting, via an said interface, at least one message of a communication protocol including a information representative of said total energy requirement. Thus, the implementation is simple and flexible.

According to a particular embodiment, the means for providing an indication of the total energy requirement comprise means for selecting an impedance level to be exposed via one of said plurality of impedance levels, as a function of said total energy requirement. Thus, the implementation is carried out without compromising the communication capacity between the luminaire and the remote equipment.

According to a particular embodiment, the means for selecting an impedance level to be exposed comprise means for effecting a reset of said interface, activated during a change of impedance level to be exposed, and the luminaire comprises means for install a battery adapted to allow to supply the electronic card during the reset of said interface. Thus, a continuity of treatments performed by the electronic card is provided.

According to a particular embodiment, the luminaire comprises means for making a current draw greater than the energy budget granted by the remote equipment to the luminaire, in order to cause a reset of said interface by the remote equipment.

According to a particular embodiment, the luminaire comprises at least one capacitive effect component adapted to power the lighting system during the reset of said interface. Thus, the impact of the reset of the interface on the lighting is minimized. Thus, a continuity of lighting service is ensured.

According to a particular embodiment, the luminaire comprises means for determining a maintenance level of the luminaire representative of a difference between a level of energy actually consumed by the lighting system and an expected level of energy consumed, and means for providing, via a said interface, the determined maintenance level. In this way, the maintenance management of the luminaire is simplified, which allows additional savings in terms of energy budget, when the lighting system is maintained in optimal operating condition.

According to a particular embodiment, a said interface permitting via the same cable to the electronic card to exchange data and to receive the power supply signal, said interface conforms to the IEEE 802.3at standard or the IEEE 802.3af standard. Thus, the implementation of the interface is simplified. According to a particular embodiment, the lighting system is of the electroluminescent diode type. Thus, the energy consumption is reduced.

The invention also relates to a method implemented by a luminaire comprising a lighting system powered by a power supply signal according to an energy budget provided by a remote equipment. The luminaire comprises an electronic card comprising an interface allowing, via the same cable, the electronic card to exchange data with the remote equipment in the context of a definition of the energy budget granted by the remote equipment to the luminaire and of receive the power signal from the remote equipment. The method is such that said electronic card performs the following steps: estimation of an energy requirement of the lighting system; and indicating to the remote equipment, via said interface, a total energy requirement, based on the estimated energy requirement of the lighting system.

The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being given in relation to the attached drawings, among which:

FIG. 1 schematically illustrates a luminaire connected to a remote equipment supplier of supply signal, according to a first embodiment of the invention;

FIG. 2 schematically illustrates the luminaire connected to the remote equipment, according to a second embodiment of the invention;

FIG. 3 schematically illustrates an architecture of an electronic card of the luminaire;

FIG. 4 schematically illustrates an algorithm implemented by the electronic card in the context of an energy budget definition granted by the remote equipment to the luminaire.

Fig. 1 schematically illustrates a luminaire 102 connected to a remote equipment 101 supply signal provider, according to a first embodiment of the invention. The luminaire 102 comprises an electronic card 130 and is adapted, thanks to at least one interface 121 of said electronic card 130, to be connected to the remote equipment 101 via at least one cable 103 respectively.

The interface or interfaces 121 are adapted to allow the electronic card 130 to exchange data with the remote equipment 101, particularly in the context of a defining an energy budget granted by the remote equipment 101 to the luminaire 102 and receiving the power signal from the remote equipment 101. When the interface 121 does not involve strong currents, this allows the installation of the fixture 102 without the assistance of an electrician.

In a particular embodiment, the interface 121 makes it possible, via the same cable, to the electronic card 130 to exchange data with the remote equipment 101 and to receive the power signal from the remote equipment 101. In this case, the interface 121 may conform to the IEEE 802.3at standard or the IEEE 802.3 af standard. In this case, the cable 103 is of type UTP ("Unshielded Twisted Pairs" in English) of category 5, 5e or 6. The interface 121 then preferably comprises an RJ-type connector 45.

Other techniques can be used to implement the same cable for power and communications, such as the phantom power principle as described in IEC 61938.

According to another embodiment, the remote equipment 101 supplies the luminaire 102 with power via a cable and the communications are established via another medium, whether it be a wired network or a wireless network, for example of the Wi type. -Fi (registered trademark).

Hereinafter, it is considered, illustratively, the case where power and communications are implemented via the same cable.

The luminaire 102 further comprises a power distribution module 122 adapted to receive the supply signal from the interface 121 and to supply the other modules and components of the electronic card 130.

The luminaire 102 furthermore comprises a lighting system 123. Preferably, the lighting system comprises a printed circuit circuit board (PCB) on which electroluminescent components, for example LEDs ( "Light-Emitting Diode"). The lighting system 123 can thus be part of the electronic card 130. In addition, the luminaire 102 is preferably a luminous slab intended to be installed on a false ceiling structure.

The electronic card 130 includes a control module 124 for communicating with the remote equipment. The control module 124 is in charge of estimating an energy requirement of the luminaire 102 and possibly at least one device connected to at least one input-output 125 of the electronic card 130. Each device can then also be supplied via input-output 125. The control module 124 is also in charge of providing an indication to the remote device 101, via the interface 121, of a total energy requirement for the luminaire 102 and possibly the device (s) connected (s).

Such devices are for example sensors, such as sensors for temperature, pressure, presence, movement or brightness, or other. In another example, such devices are surveillance cameras. In yet another example, such devices are RFID tag readers ("Radio Frequency IDentification"). According to yet another example, such devices are other light-emitting diodes for implementing Li-Fi type data transmissions. According to yet another example, such devices are means of communication compliant with the EnOcean wireless communication standard, detailed in the normative document IEC 14543-3-10, thus enabling the luminaire 102 to communicate with sensors or control members self-powered.

The electronic card 130 thus makes it possible to trace information received from these peripherals to the remote equipment 101. The electronic card 130 also makes it possible to send information, such as commands, to these peripherals. Such commands can then be generated by the electronic card 130 or remote equipment 101.

It is then possible to use the lighting supply infrastructure, such as the luminaire 102, in a building and the distribution in the building of these luminaires, to implement additional services within said building.

In order to estimate the energy requirement of the luminaire 102, the control module

124 may take into account data received from at least one device via at least one respective input-output 125. For example, a motion detector sends to the control module 124 information representative of a movement detected in an area to be illuminated by the lighting system 123, while the control module 124 is configured in alarm mode. In this case, the control module 124 can provide the remote equipment 101 with an indication of the maximum total energy requirement in relation to what the luminaire can accept, in order to activate the lighting system 123 at its maximum power. 'lighting. In a particular embodiment, the control module 124 can take into account a brightness level of a lighted area, or to be illuminated by the luminaire 102. A brightness sensor is then connected to an input-output 125, by example to a dedicated input-output, and provides the control module 124 an indication of brightness level of the area. This makes it possible to adjust the energy budget granted by the remote equipment 101 to the luminaire 102 as a function of the brightness level, and this allows the control module 124 to adapt accordingly the power transmitted to the lighting system 123.

According to an alternative embodiment, the electronic card 130 is connected to a lighting intensity control member, for example in the form of a potentiometer. In order to estimate the energy requirement of the luminaire 102, the control module 124 can then take into account a lighting intensity value supplied by said control member. This makes it possible to adjust the energy budget granted by the remote equipment 101 to the luminaire 102 as a function of this value of illumination intensity, and this allows the control module 124 to adapt accordingly the power transmitted to the system. lighting 123.

In order to estimate the energy requirement of at least one device connected to the I / O 125, the control module 124 can detect the presence of such peripherals and apply a fixed budget for each of these devices.

In order to determine the total energy requirement, the control module 124 may apply a predefined upper margin to the energy requirement of the luminaire 102 and / or, when at least one device is powered by the electronic card 130, to the energy requirement of this (s). peripheral devices).

In order to provide an indication to the remote equipment 101 of the total energy requirement, the control module 124 comprises means for transmitting, via said interface, at least one message of a communication protocol including information representative of said total energy requirement. As a variant, the control module 124 can implement a register dedicated to the storage of information representative of said total energy requirement, to which the remote equipment 101 accesses on request, thanks to the communications established between the remote equipment 101 and the luminaire 102 via cable 103.

In a particular embodiment, such a communication protocol may be based on the LLDP network topology discovery protocol ("Link Layer"). Discovery Protocol "), as is the case with the IEEE 802.3af and IEEE 802.3at standards.

In a particular embodiment, the control module 124 is also responsible for providing the remote equipment 101 with an indication of a maintenance level of the luminaire 102. This level of maintenance is for example determined by the control module 124. by supplying the lighting system 123 with a predefined power, by determining the energy effectively consumed by the lighting system 123 and by determining a difference between the energy actually consumed and a consumed energy expected by the control module 124 at the seen from the predefined power. Thus, when the energy actually consumed is less than that expected, the control module 124 determines that the lighting system 123 is defective and that a maintenance operation is necessary. The control module 124 then reflects this situation in the maintenance level indication of the luminaire 102.

Fig. 2 schematically illustrates the luminaire 102 connected to the remote equipment 101, according to a second embodiment of the invention. The scheme of FIG. 2 is a diagram of FIG. 1, except that an impedance selection module 126 is added to the electronic board 130. The difference between the first and second embodiments lies in the manner in which the electronic board 130 indicates the total energy requirement to the remote unit 101.

The impedance module 126 allows the control module 124 to select an impedance level to be exposed to the equipment 101 via the interface 121 from a plurality of impedance levels. Each impedance level is representative of a device energy class, as for example defined in the IEEE 802.3af and IEEE 802.3at standards. Each impedance level is then equivalent to a separate device signature vis-à-vis the energy requirement of this device. The control module 124 is then adapted to select the appropriate impedance level, according to the total energy requirement.

When an impedance change is to be exposed, it may be necessary to reset the interface 121, that is to say to temporarily break the electrical connection between the luminaire 102 and the remote device 101. The luminaire 102 comprises then means 140 for installing a battery or a battery, in order to supply the electronic card 130 during the reset of the interface 121. The peripherals connected to the electronic card 130 may also be powered by this battery or battery.

In another embodiment, the control module 124 transmits, to the remote equipment 101 via the interface 121, a command forcing the remote equipment 101 to reset the link established with the luminaire 102 via the cable 103.

In yet another embodiment, the control module 124 configures the luminaire 102 to make a supply current draw greater than the budget granted by the remote device 101 to the luminaire 102. When the behavior of the remote device 101 defines such a situation is an anomaly, the remote equipment 101 resets the link established with the luminaire 102 via the cable 103.

Such a temporary interruption of the electrical connection between the luminaire 102 and the remote equipment 101 may cause a temporary power failure of the lighting system 123, if the lighting system 123 is not powered by battery or battery in the interval. The power distribution module 122 may then include at least one capacitive effect component adapted to power the lighting system 123 during the reset of the interface 121. The transient regime introduced by the capacitive effect will thus allow to limit the decrease in lighting intensity the time of the reset of the interface 121.

Fig. 3 schematically illustrates an architecture of the electronic card 130.

This schematic architecture comprises, connected by a communication bus 310: a processor, microprocessor, microcontroller (denoted μο) or CPU (Central Processing Unit in English) 301; Random Access Memory (RAM) 302; a ROM (Read Only Memory) 303; a medium storage drive 304, such as a SD (Secure Digital Card) card reader; and interface means 305 comprising the interface 121, the power distribution module 122 and the input-outputs 125.

The microcontroller 301 is capable of executing instructions loaded into the RAM 302 from the ROM 303, an external memory, a storage medium, or a communication network. After powering up, the microcontroller 301 is able to read instructions from RAM 302 and execute them. These instructions form a computer program causing the microcontroller 301 to implement all or part of the algorithm described below in relation with FIG. 4. All or part of the algorithm described below in relation with FIG. 4 can be implemented in software form by executing a set of instructions by a programmable machine, such as a DSP {Digital Signal Processor in English) or the microcontroller 301, or be implemented in hardware form by a machine or a component dedicated, such as an FPGA (Field Programmable Gate Array) or an ASIC (Application-Specific Integrated Circuit in English).

Fig. 4 schematically illustrates an algorithm implemented by the control module 124 in the context of the energy budget definition granted by the remote equipment 101 to the luminaire 102.

In a step 401, the control module 124 initializes the electronic card

130 by the power supply signal received from the remote equipment 101 when the luminaire 102 is physically connected to the remote device 101 via the cable 103. For example, the control module 124 can declare a total energy requirement by default and the adjust afterwards.

In a step 402, the control module 124 estimates the energy requirement of the luminaire 102, as already described in relation to FIG. 1.

In an optional step 403, the control module 124 estimates the energy requirement of at least one device connected to at least one input-output 125 of the electronic card 130, as already described with reference to FIG. 1.

In a step 404, the control module 124 indicates to the remote equipment, via the interface 121, a total energy requirement, taking into account the energy requirement of the luminaire 102, possibly the energy requirement of the peripheral (s) and possibly a predefined upper margin. This indication can be made by means of one or more messages, as already described in relation to FIG. 1, or by impedance matching, as already described in connection with FIG. 2.

Then, for example following the passing of a predefined delay or following an event detection, such as a detection of connection or disconnection of a peripheral, the control module 124 repeats the step 402. Control module 124 thus allows an adaptive and therefore dynamic declaration of the total energy requirement.

Claims

1) A luminaire (102) having a lighting system (123) for being powered by a power supply signal provided by a remote equipment (101), and an electronic card (130) comprising:

at least one interface (121), adapted (s) to allow the electronic card to exchange data with the remote equipment in particular within the framework of a definition of an energy budget and to receive the feed signal of remote equipment;

means (124) for estimating an energy requirement of the lighting system; and

means (124; 126) for providing an indication, via at least one said interface, of a total energy requirement, based on the estimated energy requirement of the lighting system, the luminaire being characterized in that the electronic circuit board comprises :

means for making a current draw greater than the energy budget granted by the remote equipment to the luminaire, in order to cause a reset of said interface by the remote equipment. 2) Luminaire according to claim 1, characterized in that the electronic card further comprises:

at least one input-output (125) for connecting at least one peripheral; and

means (124) for estimating an energy requirement of the one or more peripherals via the respective one or more inputs-outputs;

and in that the means for providing an indication of the total energy requirement are adapted to indicate the total energy requirement further based on the energy requirement of the peripheral device (s). 3) Luminaire according to claim 2, characterized in that the electronic card comprises means for receiving, via a said input-output, data from at least one said device,

and in that the electronic card comprises means for transmitting, via an said interface, the received data. 4) Luminaire according to claim 2, characterized in that the electronic card comprises means for receiving, via a said input-output, data from at least one said device,

and in that the means for providing an indication of the total energy requirement are adapted to indicate the total energy requirement on the basis additionally of the received data.

5) Luminaire according to claim 4, characterized in that the electronic card comprises means for receiving, via a said input-output, an indication of brightness level of an area to be illuminated by said luminaire,

and in that the means for estimating the energy requirement of the lighting system are adapted to estimate the energy requirement of the lighting system according to the brightness level indication.

6) Luminaire according to any one of claims 1 to 5, characterized in that the means for providing an indication of the total energy requirement comprise means for transmitting, via an said interface, at least one message of a communication protocol including information representative of said total energy requirement.

7) Luminaire according to any one of claims 1 to 6, characterized in that the means for providing an indication of the total energy requirement comprise means (126) for selecting an impedance level to be exposed via a said interface among a plurality of impedance levels, according to said total energy requirement.

8) Luminaire according to claim 7, characterized in that the means for selecting an impedance level to be exposed comprise means for effecting a reset of said interface, activated during a change of impedance level to be exposed, and the luminaire comprises means (140) for installing a battery adapted to allow powering the electronic card during the reset of said interface. 9) Luminaire according to any one of claims 2 to 8, characterized in that it comprises at least one component (122) capacitive effect adapted to power the lighting system during the reset of said interface. 10) Luminaire according to any one of claims 1 to 9, characterized in that it comprises means for determining a maintenance level of the luminaire representative of a difference between a level of energy actually consumed by the lighting system and an expected level of consumed energy, and means for providing, via said interface, the determined maintenance level.

11) Luminaire according to any one of claims 1 to 10, characterized in that, said interface allowing via the same cable to the electronic card to exchange data and receive the power signal, said interface is in accordance with standard IEEE 802.3 at or IEEE 802.3af standard.

12) Luminaire according to any one of claims 1 to 11, characterized in that the lighting system is of the type LEDs.

13) A method implemented by a luminaire (102) comprising a lighting system (123) powered by a power supply signal according to an energy budget provided by a remote equipment (101), said luminaire comprising an electronic card (130) having at least one interface (121) enabling the electronic card to exchange data with the remote equipment as part of a definition of the energy budget granted by the remote equipment to the luminaire and to receive the power supply signal from the remote equipment, said electronic card performs the following steps:

estimating (302) an energy requirement of the lighting system; and providing an indication (304) to the remote equipment, via at least one said interface, of a total energy requirement, based on the estimated energy requirement of the lighting system, the method being characterized in that the electronic card also performs a step of implementing a current draw greater than the energy budget granted by the remote equipment to the fixture, to cause a reset of said interface by the remote device.