FR3094103A1 - Power consumption display system, charger for such a system, method and program for implementing such a system - Google Patents

Abstract

The subject of the invention is a system for displaying electrical consumption data from an electrical installation, comprising: - a terminal comprising a first interface (INT1) for retrieving data sets, a second communication interface (INT2) short range, communicating with a peer interface (NFCc) in a charger and triggering the launch of an application (APP) that performs the retrieval of the datasets. The terminal includes a data set display screen. The display of the data sets depends on the position of the terminal on the charger. Other objects of the invention are a charger for such a system, as well as a method and a computer program for implementing such a system. System. Abstract: FIG. 3

Description

System for displaying electrical consumption, charger for such a system, method and program for implementing such a system

The invention relates to the display of electrical consumption data of an installation.

A field of application of the invention is that of the management and monitoring by a user of the electricity consumption of an installation through a connected object.

The monitoring of electricity consumption in an installation is generally carried out through a monitoring device available to a user. Such a device can make it possible to display a history of electrical consumption and a statement of expenditure in relation to this consumption. Users of such devices generally wish to monitor their consumption on a regular basis, ideally daily, in order to be able, for example, to adjust their consumption by adapting their behavior during the following days. Users of such devices also wish to be assisted with an estimate of future expenses over a certain period.

The recovery of such data generally requires a connection making it possible to couple the device to the electricity meter of the electrical installation whose consumption is monitored. Such coupling requires the installation of a transmitter on the meter and a receiver in the device. A clock counter is also needed for synchronization with a calendar to retrieve and display data over a time interval. Such synchronization occurs when connecting the clock counter to another device to retrieve a calendar, such as a computer.

The technical means implemented therefore remain complex, costly and limit the possibilities of consulting and interpreting electricity consumption data.

Technical problem

A good understanding of the electricity consumption situation of an installation requires the recovery and display of different types of consumption data, so that the user has a global and complete view of his consumption. The display of such data must also be easy for the user to interpret, so that they can understand their consumption and adapt their behavior appropriately.

It is also desirable that the instrumentation necessary for such monitoring of consumption be easy to connect to an installation and allow convenient access to the information sought by the user.

To this end, the invention relates to a system for displaying electrical consumption data of an electrical installation, comprising:
- a terminal comprising a first communication interface configured to retrieve a plurality of sets of consumption data,
- a terminal charger, by induction, comprising a support surface to accommodate the terminal on the charger,
in which the terminal further comprises a second short-range communication interface, configured to communicate with a counterpart interface which the charger comprises,
the communication between the second interface and the peer interface triggering the launch of an application on the terminal executing at least:
- a recovery of at least a first set of consumption data via the first interface, and a display of a representation of the first set of data on a screen that includes the terminal, and
- upon detection of a predetermined movement of the terminal relative to the support surface while maintaining communication between the second interface and the counterpart interface, a display on the screen of a representation of a second set of data distinct from the first dataset.

According to one embodiment, the first communication interface comprises client software in communication with server software, preferably a Web server; the second communication interface is an initiator NFC device; and the peer interface is a target NFC device.

The terminal must be compatible with inductive charging technology.

In a preferred embodiment, the target NFC device is an NFC chip, also called NFC tag, making it possible to carry out a transfer of data at very short distance, called of the NFC (Near Field Communication) Near Field Communication type.

In the following description, only so-called passive tags, that is to say without independent power supply, are considered.

The initiator NFC device is adapted to emit an interrogator signal in a detection field. The target NFC device, arranged in the charger body so as to be in the detection field of the initiator NFC device when the terminal is placed on the charger, comprises identification content and is adapted to receive and modulate the interrogator signal according to said identification content and retransmitting a modulated signal.

The identification content of the target NFC device comprises identification information relating at least to the program, more particularly to the application software also called "application", to be executed on the terminal and to the electrical installation whose electrical consumption data are retrieved and processed for display on the terminal.

The execution of the application is launched upon detection of the modulated signal by the initiating NFC device.

In a preferred embodiment, the terminal is a mobile telephone or a tablet compatible with NFC technology thanks to an NFC chip reading device and on which the NFC reading function is activated. The mobile telephone is preferably a smartphone on which various software/applications can be executed thanks to an operating system, and has at least web browsing, localization and orientation functionalities thanks to an inertial unit comprising an accelerometer , a gyrometer and/or a magnetometer. The mobile phone or tablet must be suitable for establishing a connection to the Internet, for example via a mobile phone network or a Wi-Fi network. In this embodiment, the NFC initiator device is the Smartphone NFC chip reading device. The terminal processor is the mobile processor of the mobile phone or tablet, also known as a mobile chip and known by the acronym Soc designating a System on a Chip. The executed application corresponds to application software, preferably downloaded from an online platform of applications compatible with the operating system of the smartphone and accessible via the Internet, hosted and executed using the resources and the operating system of the smartphone. Said application can also correspond to a web application, hosted by a transformed web server and displaying its man-machine interface in a web browser.

The display of power consumption data by the screen is carried out by means of a graphics processor, called GPU (Graphics Processing Unit), providing the calculation functions of the display and advantageously integrated into the mobile chip of the telephone. mobile or tablet.

According to one embodiment, the terminal comprises an inertial sensor controlled by the application and adapted to detect the predetermined movement of the terminal on the support surface.

According to one embodiment, the inertial sensor comprises at least one component among a gyrometer, a magnetometer and an accelerometer, to determine an initial position of the terminal on the support surface and to measure an angular displacement with respect to said initial position, the displacement predetermined being detected as a function of the measured angular displacement.

More particularly, the predetermined displacement is detected by comparing the measured angular displacement with predetermined angular values.

According to one embodiment, the processor is configured to receive from the inertial sensor displacement information representative of the position of the terminal on the support surface, and more particularly of the detection of a predetermined displacement of the terminal on the support surface , and to send a display control signal to the screen as a function of said displacement information.

In the preferred embodiment where the terminal is a mobile telephone or a tablet, the inertial sensor is the inertial unit provided in the mobile telephone or the tablet.

To this end, the support surface of the charger extends substantially along the horizontal plane, and is adapted to lay the terminal flat and rotate it along a vertical axis. In another advantageous embodiment, the support surface comprises a projecting portion forming a relief, preferably provided at a central point of the support surface and adapted to place the terminal in balance thereon. More particularly, said protruding portion has a convex shape towards the outside of the charger, said relief having a convex profile. The protruding portion forms a pivot point making it possible to facilitate the rotation of the terminal around a vertical axis passing through said central point. Indeed, the contact between the support surface and the terminal being limited to a surface of the protruding portion, the friction forces during the rotation of the terminal are reduced. The inertial sensor, and more particularly the gyrometer, makes it possible to measure the angular positions and in particular the current angular accelerations of the terminal. The displacement information is continuously updated so that the display control signal is adapted to the current position of the terminal on the charger.

According to one embodiment, the system comprises sound communication means provided in the charger and adapted to emit a sound signal when the launch of the application is triggered on the terminal, the sound communication means being in communication with a third interface communication of the terminal. The sound communication means is advantageously an acoustic vibrator, also called a resonance loudspeaker. An advantage of using a buzzer is its size allowing for compact mounting of the loader. The charger being generally arranged, during its implementation, on a support such as a table, another advantage of the use of an acoustic vibrator is the improvement of the sound performance, the surface of the support on which is placed the charger acting as an emissive membrane.

In one embodiment, the sound signal is emitted according to a sound control signal received by the sound communication means, via the third interface by wireless communication.

More particularly, the transmission of the sound control signal is controlled by the application upon receipt by the initiating NFC device of the modulated signal, advantageously as a function of the modulated signal. For this purpose, the third interface is advantageously coupled to the second interface.

According to one embodiment, the sound control signal is emitted from the terminal at the time of launching the execution of said program according to the modulated signal. The sound communication means can be a Bluetooth peripheral, and provision can be made to initiate the pairing of the terminal with it when the terminal is placed on the charger.

Another object of the invention is an induction charger for a terminal in a system according to the invention.

Another object of the invention is a method for displaying electrical consumption data of an electrical installation, implementing a system according to the invention and comprising the following steps:
- initiation of communication between the second interface of the terminal and the counterpart interface of the charger upon detection of proximity between the terminal and the support surface of the charger;
- triggering the launch of the application on the terminal by said communication between the second interface and the counterpart interface;
- execution by the application of the recovery of at least a first set of consumption data via the first interface, and the display of a representation of the first set of data on the screen of the terminal;
- execution by the application of the display on the screen of a representation of a second set of data distinct from the first set of data upon detection of a predetermined movement of the terminal relative to the support surface while maintaining the communication between the second interface and the peer interface.

More particularly, the initiation of the communication between the second interface of the terminal and the counterpart interface corresponds to the emission, by the initiating NFC device, of the interrogator signal then to the reception of the modulated signal according to the identification content of the target NFC device.

The launch of the application on the terminal is triggered by the transmission, from the initiating NFC device, of an identification signal representative of the modulated signal, then the processing by the processor of said identification signal, in particular in order to be able to authenticate the first communication interface as a client to the server on which the plurality of data sets are located.

At the same time, the processor receives and processes a position signal representative of the position of the terminal on the support surface, preferably of the detection of a predetermined displacement.

The display, on the screen of the terminal, of a representation of a data set among the plurality of data sets is controlled by a display control signal received by the screen from the processor. The display control signal is calculated based on the identification signal, or the identification and position signals.

According to one embodiment, on execution of the application, a plurality of data sets comprising at least the first and second data sets is retrieved via the first interface, the display of the representation of the second data set being determined from the plurality of data sets retrieved based on the detection of the predetermined displacement.

More particularly, the recovery of the plurality of data sets is carried out on execution of the application by sending, via the first interface and to a remote server for example, a request formulated according to the signal of identification. The plurality of data sets retrieved then comprises at least two distinct data sets.

The application then determines the display control signal by selecting, depending on the detection of the predetermined movement, and more generally depending on the position of the terminal on the charger, a set of data to display from among the plurality retrieved.

According to one embodiment, the application executes the recovery of the second data set according to the detection of the predetermined displacement.

More particularly, the recovery of the plurality of data sets is carried out on execution of the application by sending, via the first interface and to a remote server for example, a request formulated according to the signal of identification as well as depending on the detection of the predetermined movement, and more generally of the position of the terminal on the charger. The data set to retrieve is therefore already determined by the application in the request sent. Each data set is therefore recovered according to the position of the terminal on the charger, and more particularly according to the detection of a predetermined movement.

According to one embodiment, the retrieved data set is chosen from the following list: electrical energy consumed during the last 24 hours; electrical energy consumption peaks over a period; comparison of the electrical energy consumed during the last 24 hours with the electrical energy consumed during another period.

Another object of the invention is a computer program comprising instructions for implementing the method according to the invention, said instructions being executed by at least one processor.

The invention will be well understood, and its advantages will appear better on reading the following detailed description of embodiments of the invention represented by way of non-limiting examples:

Fig. 1

is an exploded view of part of a system according to the invention;

Fig. 2

is a functional diagram representing the operation of the system according to the invention;

Fig. 3

illustrates the steps of an exemplary method implementing the system according to the invention;

Fig. 4

is a diagram of the terminal in use;

Fig. 5

is an example of a first representation on a screen of the terminal;

Fig. 6

is an example of a second representation on a screen of the terminal;

Fig. 7

is an example of a third representation on a screen of the terminal.

The examples which follow will make it possible to better understand the present invention, without however limiting its scope. The embodiments described below relate to the display of energy consumption data, in particular electricity. Nevertheless, without loss of generality, the invention may have other applications such as the display of water or gas consumption data.

In the various figures, the same references designate identical or similar elements.

FIG. 1 is an exploded view of a charger 2 forming part of a system 1. System 1 also comprises a terminal 3, represented in FIG. 2. System 1 allows a user to access consumption data electricity of an electrical installation. The electrical installation designates all the electrical equipment connected to a distribution network and equipping a building or a set of buildings for residential, industrial, commercial or office use.

The charger 2 comprises a support surface 21 extending substantially in a horizontal plane when the charger is assembled and under normal conditions of use. The support surface 21 is adapted to accommodate the terminal 3 on the charger. The terminal 3 is preferably a smartphone. The term "smartphone" is understood to mean an electronic device with the functions of a mobile phone and capable of running various applications - native, web or hybrid - thanks to an operating system of the device and conventional components. including: a memory MEM, a processor PROC configured to execute a program stored in said memory, a screen SC coupled to the processor to display data relating at least to the program executed and a power supply battery. The screen SC can advantageously be tactile.

In the embodiment described below, it is considered that the terminal 3 is a smartphone 3 having, in addition, at least short-range communication functionalities for the exchange of data in Near Field NFC (Near Field Communication ), web browsing, location and orientation using an inertial unit, and connection to the Internet through a mobile phone network or a Wi-Fi network. It is assumed that these features are enabled on terminal 3 at least while using system 1.

Furthermore, it is important to note that the system 1 can be implemented with a terminal having the functionalities described above but not necessarily integrating a telephony function. The terminal 3 can for example be a tablet.

In this embodiment, the charger 2 is an induction charger 2 making it possible to electrically recharge the terminal 3 placed on the support surface 21 of the charger. It is therefore assumed that the supply battery of terminal 3 (not shown) is compatible with inductive charging technology.

The support surface 21 is mounted on a charger body 20 adapted to contain a set of components necessary for the operation of the charger 2. The terminal is electrically recharged by induction, in particular thanks to a coil 22 provided in the charger body 20 In order to provide such functionality, the charger 2 incorporates, in addition to the coil 22, all the conventional components of an induction charger (not illustrated exhaustively). As shown in Figure 1, the charger body 20 includes a base 25 for connecting the charger 2 to an electrical network in order to power it electrically.

The terminal 3 comprises a first communication interface INT1 configured to communicate with a source external to the system 1 with a view to recovering data, and more particularly electricity consumption data when the system 1 is implemented. In a preferred embodiment, the first communication interface INT1 can be configured to retrieve such data from a database hosted on a remote server. Data recovery is preferably carried out using an API application programming interface offered by a web service designated by the reference WebServ in Figure 2, advantageously made available by the energy supplier of the electrical installation. Data recovery can be performed through various communication protocols with the server, preferably through an HTTP or HTTPS request, advantageously of the GET type.

The HTTP request can be accompanied by the opening of a websocket between the server and the first interface INT1 which constitutes a client of the server, with a view to receiving updated consumption data.

In another embodiment, the first communication interface INT1 can be configured to retrieve such data through a communication protocol such as MQTT, from connected components. The first interface INT1 must in particular be configured to establish a TCP/IP connection to a so-called broker server and a subscription to a type of data received by the broker. In the rest of the description, the term “request” will be used to generally designate all of the instructions making it possible to recover the consumption data via the first communication interface INT1, and will be referenced REQ.

The system 1 comprises a second communication interface INT2 provided in the terminal 3. The second interface INT2 is advantageously a short-range communication interface, called of the NFC (Near Field Communication) Near Field Communication type, and is configured to communicate with a peer interface to exchange information.

The counterpart interface is provided in the charger 22 and consists, in the present embodiment, of an NFC device designated by the reference 23 in FIG. 1, placed between the coil 22 and the base 25.

Generally, an NFC device can act either as an initiator or as a target. An initiator device initiates the communication and controls the data exchange while a target device simply responds to requests transmitted to it. Two operating modes can be provided: according to a first mode, called active, the initiator device and the target device each generate their own RF signals; according to a second mode, called passive, only the initiator device generates an RF signal and the target device modulates the received signal with its own data then reflects it towards the initiator device.

In the illustrated embodiment, the NFC device 23 is a target NFC device, represented functionally by the reference NFCc in FIG. 3, also called an NFC chip, and the operating mode provided is passive. When the charger 22 is assembled, the NFC chip is advantageously at a distance of less than 10 cm from the terminal 3 placed on the support surface 21, in order to make it possible to carry out a short-range data transfer, between the NFC chip and the terminal 3 placed on the support surface 21, provided that it is compatible with such technology.

In general, an NFC chip comprises an antenna, a non-volatile memory in which identification information is stored, a modulator adapted to modulate an interrogation signal received by the antenna by means of said information before retransmitting the modulated signal , and a power supply circuit using the energy of the interrogation signal to power the modulator. The size of the memory is generally very small, on the order of a hundred bits to a few thousand bytes, and contains at least identification information whose format uses an identification header (Universal Identifier Header) of 96 bits according to the EPC (Electronic Product Code) standard. The radio frequencies used in RFID radio-identification have been standardized by ISO, the relevant standards ISO 18000-3, ISO 14443 and ISO 15693 providing for an interrogation signal at 13.56 MHz for short distance NFC applications, typically 0 to 70 cm.

In this description, the term “NFC device” designates a device that complies with the standards of the low protocol layers ECMA 340 and ECMA 352, included in the ISO/IEC 18092 standard. NFC technology concerns peer-to-peer communications operating in half-duplex mode in the already mentioned 13.56 MHz RF band.

In order to ensure the compatibility of the terminal 3 placed on the support surface 21, the second communication interface INT2 advantageously implements an NFC reader designated by the reference NFCi in FIG. 3, which is an active device intended to emit a signal interrogating RF radio frequency and demodulating the received signal returned by the NFC chip to extract the identification information. If several chips are in the detection field of the reader, an anti-collision procedure can be implemented. Anti-collision algorithms are described in the ISO 14443 and ISO 15693 standards.

Although NFC communication only allows a relatively simple exchange of information between two devices, the structure of tags allows many applications such as access control and the identification of various objects. NFC communication is used, for example, for unilateral identification, as for an RFID tag, or even for mutual identification of the two devices.

An NFC communication can thus make it possible to initialize and configure a subsequent wireless communication between said devices, for example by means of a Bluetooth link or an 802.11 link of greater range.

The charger 22 further comprises a sound communication means 24, adapted to emit an audible sound notification of a user located a few meters from the charger 22. The sound communication means 24 can be a loudspeaker which can be coupled, by Bluetooth or Wi-Fi for example, to the terminal placed on the support surface 21, advantageously through a third communication interface INT3.

When the NFC chip 23 is in the detection field of the NFC reader of the terminal 3, the NFC chip receives an interrogator signal (SIGi) emitted by the NFC reader, modulates said interrogator signal according to an identification content IDc which is a set of identification information stored in the non-volatile memory of the NFC chip 23, and retransmits it in the form of a modulated signal. The NFC reader of the terminal is adapted to receive the modulated signal and to transmit to the processor of the terminal 3 an identification signal (SIGid) representative of said modulated signal (SIGm).

The EXE execution of an APP program installed on the terminal is started upon receipt of said identification signal by the processor. Said program may correspond to application software installed on the terminal or to a Web application whose man-machine interface displays a Web view. Without loss of generality, the program will be designated by the term “application” and the reference APP.

The processor processes the identification signal and emits a notification signal to notify the user of the start of the execution of the APP application. The notification signal can control the display of a visual notification on the screen SC of the terminal, the emission of a voice notification by the loudspeaker of the terminal or by another means of sound communication 24 advantageously coupled to the terminal 3. Such coupling can be established upon receipt of said identification signal by the processor.

If the terminal 3 is locked or in standby when the user places it on the charger 2, and if the operating system of the terminal allows it, the application commands the unlocking or the exit from standby of the terminal then the opening of an HMI man-machine interface, following or instead of the visual notification on the terminal screen. The characteristics of the notifications, for example their form and their content, are preferentially determined during the programming of the application.

In a preferred embodiment, the display of the visual notification, the emission of the voice notification, and the possible opening of the application take place simultaneously or following one another. The purpose of the notifications is to indicate to the user that the application is ready to be, or will be, opened, as well as the availability of content to be displayed through its GUI interface.

The opening of the HMI interface of the application preferably takes place after the execution of part of the program relating to the application APP in order to determine a content to be displayed on opening. More particularly, the launch of the application APP on receipt of the identification signal executes the recovery of consumption data through the first communication interface INT1, prior to the transmission of the notification signal.

The terminal location and orientation function is performed by an inertial sensor referenced NAV. More particularly, when the terminal is a smartphone, this inertial sensor corresponds to the inertial unit with which so-called “smart” mobile telephones are generally equipped.

The inertial sensor NAV is adapted to detect a position of the terminal on the support surface 21 and to send to the processor displacement information POS representative of the current position of the terminal on the support surface 21. More particularly, the inertial unit allows to detect a movement of the terminal on the support surface. Indeed, the inertial unit comprises a magnetometer, a gyrometer and an accelerometer. The detection of the movement of the terminal is preferably controlled by the application APP, in order to process the movement information POS in comparison with predetermined movement thresholds. The usefulness of such piloting is explained in the following description.

FIG. 2 represents the steps of a method for implementing the system 1. At step A, the terminal 3 is ready to be positioned on the charger 2. At step B, the user positions the terminal according to an initial position identifiable according to a direction. In the embodiment illustrated in Figure 2, the displacement thresholds are evaluated either in relation to an initial position of the terminal, calibrated by its inertial unit when it is placed on the support surface; or relative to a predetermined reference position.

In the embodiment shown in the figures, the angular displacement thresholds are angular values spaced apart by 120°. Each angular displacement threshold determines a position beacon on the loader support surface. The support surface 21 of the charger 2 has a particular shape allowing a user to place the terminal in a visually recognizable position. More particularly, the support surface 21 has substantially the shape of a triangle, so that the terminal can be placed in three directions coinciding with each of the vertices of said triangle. The support surface has a projecting portion provided at a central point equidistant from the vertices of said triangle. The three directions are identified by the references (d1, d2, d3) in FIG. 2 and therefore determine three position beacons. In a first mode of use of system 1, a first direction d1 is predetermined and the user must place the terminal in this first direction. Preferably, the first direction d1 is determined as the straight line passing through the central point and a first vertex among the vertices of the triangle, the second direction d2 passing through the central point and a second vertex among the vertices of the triangle, the third direction d3 passing by the central point and a third vertex among the vertices of the triangle. In a second mode of use, the first direction is calibrated according to the direction in which the user has placed the terminal, the first, second and third directions then being spaced 120° apart.

The control of the inertial sensor NAV by the APP application makes it possible to receive continuously updated displacement information POS according to the current position of the terminal. Indeed, the rotation of the terminal on the support surface to position it in the second direction d2 causes an angular displacement detectable by the inertial sensor NAV and contained in the displacement information POS transmitted. The APP application processes the POS displacement information by comparing it to predetermined displacement thresholds.

Other embodiments can be envisaged, in particular a different number of beacons can be provided, according to a regular or irregular angular spacing, and of more or less than 120°.

When the processor receives from the NFC reader the identification signal SIGid representative of said modulated signal SIGm by the NFC chip, the processing of the displacement information POS by the processor can be carried out according to two processing modes, with a view to determining a display control signal SIGf making it possible to display a representation of consumption data on the screen of the terminal.

According to a first processing mode, the request REQ is formulated by the processor as a function of the identification signal SIGid, and commands the recovery of a plurality of sets of consumption data (DATA), comprising at least a first set of data of consumption. The plurality of data sets preferably comprises at least a first and a second data set (DATAi). The POS displacement information is processed by the processor according to the instructions of the APP application, in order to select a first data set from among the plurality of data sets retrieved.

The display control signal is then calculated by the processor as a function: of the identification signal SIGid, of the displacement information POS, as well as of the first set of data selected from among the plurality of sets of data retrieved. The displacement information POS can therefore be processed after the execution of the data retrieval request REQ in step D.

According to a second processing mode, the displacement information POS is processed before the execution of the data retrieval request REQ. The request REQ is preferably formulated as a function of the identification signal SIGid and of the movement information NAV, with a view to selecting beforehand a first set of data to be retrieved. The display control signal is then calculated by the processor as a function of: the identification signal SIGid, the displacement information POS, as well as the first data set retrieved from among the plurality of data sets available.

The second mode of processing is preferable to the first because it requires fewer resources at the terminal. Step C1 then corresponds to the display of the first set of data.

In step C2, the user moves the terminal from the direction d1 to position it in the direction d2, while maintaining communication between the NFC chip and the NFC reader, the processor receives updated movement information POS representative of the movement of the terminal from the direction d1 to the direction d2, and processes it, with a view to determining the display control signal SIGf making it possible to display on the screen of the terminal a representation of a set of consumption data distinct from the set of data represented when the terminal was arranged in the direction d1. The processing mode of the displacement information POS updated in step C2 depends on the processing mode in step C1. If the displacement information in step C1 has been processed according to the first mode, the updated displacement information POS is processed in order to select a second data set from among the plurality of data sets retrieved. If the displacement information in step C1 has been processed according to the second mode, the updated displacement information POS is processed in order to send a request making it possible to retrieve a second set of data from among the plurality of data sets available .

A third set of data, preferably distinct from the first and second set of data, can be represented on the screen if the user moves the terminal from a tag d1 or d2 to the tag d3. Such a movement updates the movement information POS which is processed according to the same processing mode as in step C1. When the terminal is moved from a beacon among the beacons d1, d2 and d3, called the original beacon, to another beacon among the beacons d1, d2 and d3, called the target beacon, the display of the screen of the terminal continues to represent the data set representative of the original beacon, as long as the terminal is not yet positioned on the target beacon. Preferably, provision may be made to send a notification to the terminal or to a means of communication coupled to the terminal, if the user places the terminal in a position that does not correspond to any beacon.

In a preferred embodiment, the display on the screen of the terminal comprises a representation of the current position of the terminal on the support surface. Figure 4 illustrates an example of display on the screen of the terminal when system 1 is in use and the terminal is positioned in direction d3. The display is in the form of a pie chart whose content is updated according to the position of the terminal.

Figure 5 illustrates the content of the display when the terminal is positioned in the direction d1. The first data set represented indicates the energy consumption during the current day in kWh as well as an estimate of the cost of this consumption.

Figure 6 illustrates the content of the display when the terminal is positioned in the direction d2. The second dataset represented indicates a comparison between the cost of energy consumption during the current day and the cost of energy consumption the day before.

Figure 7 illustrates the content of the display when the terminal is positioned in the direction d3. The third set of data represented indicates a peak in kWh consumption recorded for example during the last month or between the first day of the current month and the current day, as well as the date and time at which the peak was reached. The display in figure 7 represents in particular the trajectory TRAJ of the terminal on the support surface, and therefore indicates the current position of the terminal as well as the recent positions occupied by the terminal.

The charger 2 being an induction charger, the magnetic field generated by the coil 22 can interfere with the magnetic field measured by the magnetometer of the inertial unit of the terminal. One solution would be to equip the charger with its own magnetometer configured to measure the magnetic field generated by the coil and communicate with the terminal through the third communication interface, or another dedicated communication interface, in order to correct and/or confirm the displacement information POS received from the inertial unit NAV. Another solution would consist in equipping the charger with a plurality of homologous NFCnv positioning interfaces suitable for communicating with the second interface INT2 of the terminal, each of which may comprise an NFC chip carrying an identification content representative of the position of said chip in the charger. The information transmitted by the modulated signals returned by said homologous NFCnv positioning interfaces would be processed by the processor together with the POS displacement information received from the inertial unit, in order to correct and/or confirm it.

Claims (11)

System (1) for displaying electricity consumption data of an electrical installation, comprising:
- a terminal (3) comprising a first communication interface (INT1) configured to retrieve a plurality of sets of consumption data,
- a charger (2) of the terminal (3), by induction, comprising a support surface (21) to accommodate the terminal on the charger,
characterized in that the terminal further includes a second short-range communication interface (INT2), configured to communicate with a counterpart interface (NFC) that includes the charger,
the communication between the second interface and the peer interface triggering the launch of an application (APP) on the terminal executing at least:
- a recovery of at least a first set of consumption data via the first interface, and a display of a representation of the first set of data on a screen that includes the terminal, and
- upon detection of a predetermined movement of the terminal relative to the support surface while maintaining communication between the second interface and the counterpart interface, a display on the screen of a representation of a second set of data distinct from the first dataset. System according to the preceding claim, in which the terminal comprises an inertial sensor (NAV) controlled by the application (APP) and adapted to detect the predetermined movement of the terminal on the support surface. System according to the preceding claim, in which the inertial sensor comprises at least one component among a gyrometer, a magnetometer and an accelerometer, for determining an initial position of the terminal on the support surface and measuring an angular displacement with respect to said initial position, the predetermined displacement being detected as a function of said measured angular displacement. System according to one of the preceding claims, in which: the first communication interface comprises client software in communication with server software, preferably a Web server; the second communication interface is an initiator NFC device; and the peer interface is a target NFC device. System according to one of the preceding claims, comprising sound communication means provided in the charger and adapted to emit a sound signal when the launch of the application (APP) is triggered on the terminal, the sound communication means being in communication with a third communication interface (INT3) of the terminal. Induction charger (2) of a system (1) according to one of claims 1 to 5. Method for displaying electrical consumption data of an electrical installation, implementing a system (1) according to any one of Claims 1 to 5 and comprising the following steps:
- initiation of communication between the second interface (INT2) of the terminal and the counterpart interface (NFC) of the charger upon detection of proximity between the terminal and the support surface (21) of the charger;
- triggering the launch of the application (APP) on the terminal by said communication between the second interface (INT2) and the peer interface (NFC);
- execution by the application (APP) of the recovery of at least a first set of consumption data via the first interface, and the display of a representation of the first set of data on the screen of the terminal;
- execution by the application (APP) of the display on the screen of a representation of a second set of data distinct from the first set of data upon detection of a predetermined displacement of the terminal relative to the support surface maintaining communication between the second interface and the peer interface. Method according to the preceding claim, in which, on execution of the application, a plurality of data sets comprising at least the first and second data sets is retrieved via the first interface, the display of the representation of the second set of data being determined from the plurality of data sets retrieved based on the detection of the predetermined displacement. A method according to claim 7, wherein the application performs retrieval of the second data set based on detection of the predetermined displacement. Method according to one of Claims 7 to 9, in which the recovered data set is chosen from the following list: electrical energy consumed in the last 24 hours; electrical energy consumption peaks over a period; comparison of the electrical energy consumed during the last 24 hours with the electrical energy consumed during another period. Computer program (APP) comprising instructions for implementing the method according to one of Claims 7 to 10, said instructions being executed by at least one processor (PROC).