EP3336300A1 - Method and device for determining the incoming solar power through an opening - Google Patents

Abstract

The invention relates to a method for determining, by means of an electronic control and processing device (112), the power or solar energy entering through an opening equipped with a motorized occultation device (100). the concealment device comprising a drive motor (201), an electric battery (108) for powering the motor (201), and a photovoltaic generator (104) for supplying the battery (108), this process comprising the following steps: a) determining a value representative of the solar irradiation of the aperture from one or more measurements of the short-circuit current of the photovoltaic generator (104); b) determining the position of the occulting device (100) and deducing therefrom the area of the opening not obscured by the occulting device; and c) deduce from said representative value of the solar irradiation and said unobstructed surface a value representative of the power or solar energy entering through the opening.

Description

Field

The present application relates to a method and a device for determining the power or solar energy entering a building through an opening, for example to control a building equipment accordingly.

Presentation of the prior art

International patent application WO2012 / 059673 discloses a self-powered motorized shutter device, comprising an electric motor for driving the shutter, an electric battery for powering the motor, and a photovoltaic generator for charging the battery from solar irradiation. A feature of this device is that it is adapted to measure a short-circuit current of the photovoltaic generator, to deduce therefrom a value representative of the solar irradiation received by the photovoltaic generator, and to control accordingly the opening or the closure of the shutter. Thus, the device is automatically controlled according to the sun.

This device, however, does not determine the power or solar energy entering the building through the opening in which it is mounted.

It would be desirable, in a building comprising an opening equipped with a motorized occultation device, to be able to automatically determine the power or solar energy entering the building through the opening, with a view to controlling a building equipment accordingly. for example a heating system, a ventilation system or an air conditioning system.

summary

1. a) déterminer une valeur représentative de l'irradiation solaire de l'ouverture à partir d'une ou plusieurs mesures du courant de court-circuit du générateur photovoltaïque ;
2. b) déterminer la position du dispositif d'occultation et en déduire la surface de l'ouverture non occultée par le dispositif d'occultation ; et
3. c) déduire de ladite valeur représentative de l'irradiation solaire et de ladite surface non occultée une valeur représentative de la puissance ou de l'énergie solaire entrant par l'ouverture.

Thus, an embodiment provides a method for determining, by means of an electronic control and processing device, the power or solar energy entering through an opening equipped with a motorized occultation device, the device concealment device comprising a drive motor, an electric battery for powering the motor, and a photovoltaic generator for supplying the battery, said method comprising the following steps:

1. a) determining a value representative of the solar irradiation of the opening from one or more measurements of the short circuit current of the photovoltaic generator;
2. b) determine the position of the occultation device and deduce the surface of the opening not obscured by the concealment device; and
3. c) deduce from said representative value of the solar irradiation and said unobstructed surface a value representative of the power or solar energy entering through the opening.

According to one embodiment, in step b), the position of the occultation device is determined taking into account a measurement of the operating time of the drive motor from a position of known origin.

According to one embodiment, in step b), the determination of the position of the occultation device also takes into account a measurement of the open circuit voltage of the battery.

According to one embodiment, in step b), the position of the occulting device is determined taking into account a measurement of the current flowing in the drive motor.

According to one embodiment, in step b), the position of the occulting device is determined taking into account a measurement of the operating time of the drive motor and a measurement of the current flowing in the motor of the motor. 'training.

According to one embodiment, in step b), the position of the occulting device is determined from one or more position sensors.

According to one embodiment, in step b), the position of the occulting device is determined by counting the number of rotational revolutions of a shaft of the driving motor of the device from a position of known origin.

According to one embodiment, step b) comprises a step of determining the total area of the opening in front of which the concealment device is mounted.

According to one embodiment, the step of determining the total surface area of the opening comprises a step of measuring the current flowing in the drive motor during an operating phase of the occultation device according to a reference movement. predetermined.

• déterminer une valeur représentative de la puissance ou de l'énergie solaire entrant par l'ouverture par un procédé tel que défini ci-dessus ; et
• commander l'équipement en tenant compte de ladite valeur représentative de la puissance ou de l'énergie solaire.

Another embodiment provides a control method of a device taking into account the power or solar energy entering through an opening equipped with a motorized occultation device, the occulting device comprising a motor of drive, an electric battery for powering the motor, and a photovoltaic generator for powering the battery, the method comprising the following steps:

• determining a value representative of the power or solar energy entering through the opening by a method as defined above; and
• control the equipment taking into account said representative value of the power or solar energy.

According to one embodiment, the equipment is a heating, ventilation or air conditioning system.

Another embodiment provides a motorized concealment device intended to be placed opposite an opening, the concealment device comprising a drive motor, an electric battery for the power supply of the motor, and a photovoltaic generator for supplying the battery, the occulting device further comprising an electronic control and processing device adapted to determine a value representative of the power or solar energy entering through the opening by a method as defined above.

• un dispositif d'occultation tel que défini ci-dessus ;
• un équipement extérieur au dispositif d'occultation ; et
• un dispositif électronique adapté à commander l'équipement en tenant compte de la valeur de puissance ou d'énergie solaire entrante déterminée par le dispositif d'occultation.

Another embodiment provides a system comprising:

• a concealment device as defined above;
• equipment outside the concealment device; and
• an electronic device adapted to control the equipment taking into account the value of power or incoming solar energy determined by the concealment device.

Brief description of the drawings

• la figure 1 est une vue en perspective schématique d'un exemple d'un dispositif d'occultation motorisé selon un mode de réalisation ;
• la figure 2 est un schéma bloc d'un exemple d'un mode de réalisation d'un système adapté à déterminer la puissance ou l'énergie solaire entrant dans un bâtiment par une ouverture et à commander en conséquence un équipement ; et
• la figure 3 est un schéma bloc illustrant des étapes d'un exemple d'un mode de réalisation d'un procédé pour déterminer la puissance ou l'énergie solaire entrant dans un bâtiment par une ouverture et commander en conséquence un équipement.

These and other features and advantages will be set forth in detail in the following description of particular embodiments in a non-limiting manner with reference to the accompanying drawings in which:

• the figure 1 is a schematic perspective view of an example of a motorized concealment device according to one embodiment;
• the figure 2 is a block diagram of an example of an embodiment of a system adapted to determine the power or solar energy entering a building through an opening and to control a device accordingly; and
• the figure 3 is a block diagram illustrating steps of an example of an embodiment of a method for determining power or solar energy entering a building through an opening and ordering equipment accordingly.

detailed description

The same elements have been designated by the same references in the various figures and, in addition, the various figures are not drawn to scale. For the sake of clarity, only the elements useful for understanding the described embodiments have been shown and are detailed. In particular, the various elements (motor, battery, photovoltaic generator, control device, etc.) that may comprise an energy-autonomous motorized occulting device have not been detailed, the described embodiments being compatible with the implementations usual of such elements. In addition, the implementation of the electronic control and processing device 112 described below, adapted to implement a method of determining power or incoming solar energy, and, if necessary, control of a device in taking into account the power or the incoming solar energy, has not been detailed, the realization of such a device being within the reach of the skilled person from the functional indications of the present description. Unless otherwise specified, the terms "approximately", "substantially", and "of the order of" mean within 20%, preferably within 10%.

The figure 1 is a schematic perspective view of an example of a motorized concealment device 100 according to one embodiment. In the example of the figure 1 , the device 100 is a motorized roller shutter type device.

The device 100 comprises an apron 102 constituted by an assembly of several blades, and further comprises a motorized shaft (not visible on the figure 1 ) on which can be rolled up the deck 102 and from which can be unrolled the deck 102.

The device 100 further comprises a photovoltaic generator 104, comprising one or more photovoltaic panels. For example, the device 100 comprises a box 106 in which is disposed the motorized shaft, the photovoltaic array (s) of the photovoltaic generator 104 being arranged on the box 106.

The device 100 furthermore comprises an electric battery 108 supplied with electrical energy by the photovoltaic generator 104 and supplying electrical power to the device 100, and in particular the drive motor (not visible on the figure 1 ) of the winding shaft of the deck 102. For example, the battery 108 is disposed in the box 106.

The device 100 further comprises an electronic control device 110 comprising one or more electronic circuits, in particular enabling the motor of the device to be controlled. For example, the control device 110 is disposed inside the box 106.

The occulting device 100 is intended to be mounted in front of an opening (not visible on the figure 1 ) of a building, able to let the light through, for example in front of a window equipped with a transparent window, so as to completely obscure the opening when it is in the closed position, and not to obscure the opening when it is in open position. Of particular interest here is the case of an occlusion device that can be controlled to be maintained in an intermediate position between the open position and the closed position, that is to say in a partially open or partially closed position .

• déterminer une valeur représentative de l'irradiation solaire reçue par le bâtiment au voisinage de l'ouverture à partir d'une ou plusieurs mesures du courant de court-circuit du générateur photovoltaïque 104 du dispositif 100 ;
• déterminer le taux d'occultation de l'ouverture par le dispositif 100 ; et
• déduire de la valeur représentative de l'irradiation solaire et du taux d'occultation de l'ouverture une valeur représentative de la puissance solaire entrant par l'ouverture.

According to one aspect of an embodiment, in order to determine the solar power entering the building through the opening in front of which the occulting device 100 is mounted, it is provided:

• determining a value representative of the solar radiation received by the building in the vicinity of the opening from one or more measurements of the short-circuit current of the photovoltaic generator 104 of the device 100;
• determine the rate of occultation of the opening by the device 100; and
• deduce from the representative value of the solar irradiation and the occultation rate of the opening a value representative of the solar power entering through the opening.

Determination of the incoming solar power may be implemented in whole or in part by a control and processing device 112 comprising one or more electronic circuits. The control and processing device 112 is for example disposed inside the box 106 of the device 100. By way of example, the control and processing device 112 comprises electronic circuits common to the control device 110.

où P désigne la puissance solaire entrante, en Watts, où S désigne la surface totale de l'ouverture, en mètres carrés, où To désigne le taux d'occultation de l'ouverture par le dispositif 100, en pourcents (S*(100-To) étant la surface de l'ouverture non occultée par le dispositif d'occultation), où Irr désigne l'irradiation solaire estimée en mesurant le courant de court-circuit du générateur photovoltaïque, en Watts par mètres carrés, et où Fs est une constante sans unité désignant le facteur solaire, c'est-à-dire le coefficient de transmission de l'énergie solaire par le vitrage fermant l'ouverture, qui peut par exemple être compris entre 0,5 et 0,9 selon l'épaisseur et la nature du vitrage.The incoming solar power can be calculated according to the following formula: $$\mathrm{P}=\mathrm{S}*\left(\mathrm{100}-\mathrm{to}\right)*\mathrm{Irr}*\mathrm{fs},$$

where P denotes the incoming solar power, in watts, where S denotes the total area of the aperture, in square meters, where To denotes the rate of occultation of the aperture by the device 100, in percent (S * (100 -To) being the area of the opening not obscured by the occulting device), where Irr denotes the estimated solar irradiation by measuring the short-circuit current of the photovoltaic generator, in Watts per square meter, and where Fs is a unitless constant designating the solar factor, that is to say the transmission coefficient of the solar energy by the glazing closing the opening, which may for example be between 0.5 and 0.9 according to the thickness and the nature of the glazing.

For example, when measuring the short circuit current of the photovoltaic generator 104, the generator 104 is isolated from the battery so as not to short circuit the battery. The short circuit current of the generator is for example measured by means of a low value resistor placed in series between positive and negative output terminals of the generator, or by means of any other current measuring device. The value of the solar irradiation Irr can be determined directly from the value of the short-circuit current of the generator, for example by means of a predetermined correspondence table or by calculation from a predetermined correspondence analytic law. Examples of methods and devices for measuring the short-circuit current of a photovoltaic generator and for determining an irradiation value received from this short-circuit current are described in detail in the patent application. WO2012 / 059673 above.

The total area S of the opening, that is the area by which solar energy can enter the building when the concealment device is in the fully open position (corresponding to the total glazed area of the building). aperture), is for example a parameter entered by the installer and stored in a memory of the control and processing device 112 during the installation of the occultation device.

As a variant, to simplify the installation of the device 100 and to limit the risks of error, the total area S of the opening can be estimated automatically by the control and processing device 112 of the device 100, from one or more measurements of the current flowing in the motor of the device 100.

For a given model of shutter-type concealment device, it can indeed be shown that there is a relationship between the torque C on the drive shaft of the device and the total surface S _V of the shutter in the closed state, which is generally substantially equal to the surface S of the opening.

More particularly, for each flap model, it is possible to determine a law f such that S _V = f (C).

This law f is generally of the type f (C) = a * C ² + b * C, where a and b are coefficients depending on the considered flap model.

It is also known that for a given motor, the torque C of the motor is proportional to the current I flowing in the motor according to a relation C = K * I, where K is a constant specific to the motor.

Thus, it is possible to measure the current I flowing in the motor during a running phase of the motor, and to deduce the total surface S of the opening from a predetermined law g such that S = g (I) (function in particular of the law f, of the coefficient K, and of a possible adjustment factor α such that S = α * S _V ).

The law g is for example stored in the control and processing device 112 in the form of a correspondence table or in the form of an analytical law.

In practice, the engine torque C, and therefore the engine current I, depend on the position of the shutter. To estimate the surface S of the opening, it is therefore expected to measure the motor current I for a predetermined movement of the flap, corresponding to a reference movement for which the law g has been determined.

By way of example, the value of the motor current I used to estimate the area S of the opening is the maximum value of the motor current during a phase of complete winding of the shutter from its closed position to its open position. . In this case, the reference movement considered is the passage of the flap by its maximum point of traction. As a variant, the value of the motor current I used to estimate the area S of the opening is the average value or the integral of the motor current during a complete winding phase of the shutter from its closed position to its position opened. In this case, the reference movement considered is the complete winding of the shutter.

By way of example, the phase of determining the total area S of the opening from one or more measurements of the current flowing in the motor is implemented during an initialization phase following the installation of the occultation device, for example during the first operation of the occultation device. The surface value S determined can then be stored in a memory of the control and processing device 112.

The occultation rate To of the opening can be determined from a detection of the position of the occulting device 100. For this, the occulting device 100 may comprise one or more sensors of the position of the shutter, for example one or more optical sensors, connected to the control and processing device 112.

Alternatively, to avoid the provision of specific position sensors, the position of the concealment device can be determined by motor stroke time measurements from a known initial position, for example the fully open position or the fully position. closed device. For this, the control and processing device 112 may comprise a memory (not detailed) adapted to store a value representative of the position of the flap, for example a value ranging from 0 when the flap is fully closed to 1 when the flap is fully open. Each actuation of the shutter by the user, the control and processing device 112 detects the direction of rotation of the flap, measures the flap travel time, and updates accordingly the value representative of the position of the flap. Thus, the control and processing device 112 can know at any time the position of the flap, and therefore the rate of occultation of the opening by the device 100.

To improve the accuracy of the shutter position estimation, the control and processing device 112 can take into account not only the travel time of the flap, but also the voltage of the battery supplying the motor. Indeed, in practice, the flap movement time to move from one position to another may depend on the voltage delivered by the battery, which may vary depending on the state of charge and / or the state of aging of the battery. By way of example, the control and processing device 112 can be configured to, at each actuation of the shutter by the user, measure the voltage open circuit of the battery, and update the value representative of the position of the flap taking into account the flap travel time and the open circuit voltage of the battery.

Alternatively, the position of the occulting device can be determined by counting the number of complete turns (360-degree rotation) of the shaft of the drive motor of the flap from a known initial position, for example the position completely. open or the fully closed position of the device. For this, the control and processing device 112 may, each time the shutter is actuated by the user, detect the direction of rotation of the shutter, count the number of complete revolutions of the motor shaft, for example by means of a coding wheel or any other suitable sensor, and update accordingly a value representative of the position of the shutter. Thus, the control and processing device 112 can know at any time the position of the flap, and therefore the rate of occultation of the opening by the device 100.

As a variant, the estimation of the position of the flap can be deduced from a measurement of the engine torque of the device. Indeed, as indicated above, the engine torque depends on the position of the shutter. The measurement of the instantaneous engine torque can thus make it possible to know the position of the flap. As previously described, the motor torque can be deduced from the current flowing in the motor. Thus, the control and processing device 112 may be configured for each actuation of the shutter by the user, measure the current flowing in the motor and deduce a value representative of the position of the flap. The law making it possible to determine the position of the shutter from the measurement of the motor current I is for example stored in the control and processing device 112 in the form of a correspondence table or in the form of an analytical law.

To improve the accuracy of the position estimation of the shutter, the control and processing device 112 can take into account not only the engine torque, but also the voltage of the battery supplying the engine. Indeed, in practice, for a given position of the flap, the engine torque may depend on the voltage delivered by the battery, which may vary depending on the state of charge and / or the aging state of the battery. For example, the control and processing device 112 is configured for each actuation of the shutter by the user, to measure the open circuit voltage of the battery, and to update the value representative of the shutter position. taking into account the motor torque and the open circuit voltage of the battery.

As a variant, the estimation of the position of the flap can be carried out by taking into account a combination of travel time measurements, engine torque measurements, and, where appropriate, open circuit voltage measurements. battery.

The instantaneous input power calculation P which has just been described can be repeated successively a plurality of times, for example at regular time intervals, so as to be able to follow the temporal evolution of the magnitude P. By way of example, the power P can be recalculated at each change of position of the shutter and / or whenever a significant variation in the short-circuit current of the photovoltaic generator 104 (and hence of the solar irradiation) is detected. By way of example, the control and processing device 112 periodically measures, for example every 1 to 60 minutes, the short-circuit current of the generator 104, and recalculates the value of the incoming power P each time. that the short-circuit current of the generator varies from more than 20 to 40 percent, for example more than 30 percent.

The solar energy entering through the opening in a given time range can be determined by the control and processing device 112 by temporal integration of the power P. For example, the power P can be integrated over a time range of one day, for example from sunrise to sunset, so as to measure the solar energy entering through the opening during the day. The times of sunrise and sunset, marking the beginning and the end of the integration phase of the power P, are for example determined from measurements of the open circuit voltage of the photovoltaic generator, as described in FIG. patent application WO2012 / 059672 . This allows for example to anticipate the programming of a heating equipment, by reducing the power of heating in a period following a sunny day.

The figure 2 is a block diagram of an example of an embodiment of a system adapted to determine the power or solar energy entering a building through an opening, and to control accordingly a piece of equipment.

The figure 2 more particularly represents a block 104 schematizing the photovoltaic generator of the occulting device 100 of the figure 1 a block 108 schematizing the battery of the occulting device 100, a block 201 schematizing the motor (not visible on the figure 1 ) of the occulting device 100, a block 112 schematizing the control and processing device of the occulting device 100, and a block 250 schematically an equipment external to the occulting device 100.

The device 100 comprises an electrical connection 203 between the photovoltaic generator 104 and the battery 108, for transmitting to the battery 108 the electrical energy supplied by the generator 104, and an electrical connection 205 between the battery 108 and the motor 201, for transmitting to the motor 201 the electrical energy stored in the battery 108.

The device 100 further comprises an electrical connection 207 between the photovoltaic generator 104 and the control and processing circuit 112, allowing in particular the circuit 112 to measure the short-circuit current of the generator 104. The control and processing circuit 112 is for example adapted to control the isolation of the photovoltaic generator 104, that is to say the interruption of the electrical connection 203 between the generator 104 and the battery 108, during the implementation of a measurement of the short-circuit current of the generator 104.

In this example, the device 100 further comprises an electrical connection 209 between the battery 108 and the control and processing circuit 112, in particular enabling the circuit 112 to measure the voltage of the battery 108. The control and processing circuit 112 is for example adapted to control the isolation of the battery 108, that is to say the interruption of electrical connection 203 between the generator 104 and the battery 108 and the interruption of the electrical connection 205 between the battery 108 and the motor 201, during the implementation of a measurement of the voltage of the battery 108, so as to measure the open circuit voltage of the battery 108.

In this example, the device 100 further comprises an electrical connection 211 between the motor 201 and the control and processing circuit 112, allowing in particular the circuit 112 to measure the current flowing in the motor 201 of the device, to deduce the torque engine.

The system of figure 2 further comprises a link 213 between the control and processing circuit 112 and the external equipment 250, for example a wired link or a wireless radio link. The processing circuit 112 is adapted to transmit the incoming solar power and / or incoming solar energy measurements to the equipment 250 via the link 213, or to control the equipment 250 taking into account the power measurements. incoming solar energy and / or incoming solar energy through the link 213.

For example, the equipment 250 may be a heating, ventilation or air conditioning system whose control or programming is adjusted to take account of the power solar or solar energy entering the building or the relevant room of the building through the opening.

The figure 3 is a block diagram illustrating steps of an example of an embodiment of a method for determining power or solar energy entering a building through an aperture, and controlling a device accordingly. This method is for example implemented in whole or in part by the control and processing device 112 of the occulting device 100.

The process of figure 3 comprises a phase 301 for determining the total area S of the opening in front of which the occulting device 100 is mounted.

In the example of the figure 3 , the phase 301 for determining the surface S comprises a step 301a for measuring the motor current of the device during a raising and / or lowering phase of the flap, followed by a step 301b of determining a value representative of the engine torque from the current measurement performed in step 301a, then a step 301c for determining the area S of the opening from the motor torque value determined in step 301b.

The method further comprises a phase 303 for determining the position of the occultation device, in order to determine the occultation rate To of the opening by the device.

In the example of the figure 3 phase 303 comprises a step 303a for measuring the rise and / or fall times of the shutter from a position of known origin. Phase 303 further comprises a step 303b for determining the position of the flap from the running times measured in step 303a.

The process of figure 3 further comprises a step 305 of calculating the unobstructed area of the aperture, corresponding to the product of the total area S by the occultation rate To, from the surface values and occultation rates determined during the phases 301 and 303.

The process of figure 3 furthermore comprises a step 307 for measuring the short-circuit current of the photovoltaic generator 104, and a step 309 for calculating the solar irradiation Irr, taking into account the measurement of the short-circuit current carried out in step 307.

The process of figure 3 comprises a step 311 for calculating the solar power P entering through the opening, taking into account the solar irradiation Irr determined in step 309, of the unobstructed area of the opening determined in step 305, and , if applicable, the solar factor or transmission coefficient Fs of the opening.

The method may further comprise a step 313 for calculating the solar energy entering through the opening, corresponding to a time integration of the incoming solar power, and a step 315 for controlling an external equipment, taking into account the measurement of solar power or solar energy achieved.

Particular embodiments have been described. Various variations and modifications will be apparent to those skilled in the art. In particular, the described embodiments are not limited to the aforementioned examples of controllable equipment taking into account the measurement of solar power or incoming solar energy. More generally, the described embodiments can be adapted to the control of any equipment whose operation can be optimized by taking into account a contribution of solar energy entering through an opening of a building, for example a control system. automatic watering of plants located inside the building. Alternatively, the described embodiments can be applied to occultation devices for greenhouse type glass openings, or for windows of an animal building.

It should be noted that solar energy generally enters a building mainly through the windows of the building. Thus, if all the windows of the building are equipped with a device occultation of the type described above, one can estimate the total solar energy entering the building.

Furthermore, the determined incoming power or solar energy data can be used in combination with other data, for example weather forecast data, to control one or more building equipment.

Claims (13)

Method for determining, by means of an electronic control and processing device (112), the power or solar energy entering through an opening equipped with a motorized occulting device (100), the device for concealment comprising a drive motor (201), an electric battery (108) for supplying the motor (201), and a photovoltaic generator (104) for supplying the battery (108), this method comprising the steps following: a) determining a value representative of the solar irradiation of the aperture from one or more measurements of the short-circuit current of the photovoltaic generator (104); b) determining the position of the occulting device (100) and deducing therefrom the area of the opening not obscured by the occulting device; and c) deduce from said representative value of the solar irradiation and said unobstructed surface a value representative of the power or solar energy entering through the opening. A method according to claim 1, wherein in step b) the position of the concealment device (100) is determined by taking into account a measurement of the operating time of the drive motor (201) from a position of known origin. The method of claim 2, wherein in step b), determining the position of the obscuration device (100) further takes into account a measurement of the open circuit voltage of the battery (108). Method according to any one of claims 1 to 3, wherein, in step b), the position of the occulting device (100) is determined taking into account a measurement of the current flowing in the drive motor (201). A method according to any one of claims 1 to 4, wherein in step b) the position of the concealment device (100) is determined taking into account a measurement operating time of the drive motor (201) and a measurement of the current flowing in the drive motor (201). A method as claimed in any one of claims 1 to 5, wherein in step b) the position of the shading device (100) is determined from one or more position sensors. A method as claimed in any one of claims 1 to 6, wherein in step b) the position of the concealment device (100) is determined by counting the number of revolutions of a motor shaft of driving (201) the device from a position of known origin. A method according to any one of claims 1 to 7, wherein step b) comprises a step of determining the total area of the opening in front of which the concealment device (100) is mounted. A method according to claim 8, wherein the step of determining the total area of the aperture comprises a step of measuring the current flowing in the drive motor (201) during an operation phase of the shading device (100) according to a predetermined reference movement. Method for controlling an equipment (250) taking into account the power or solar energy entering through an opening equipped with a motorized occultation device (100), the occulting device comprising a drive motor (201), an electric battery (108) for powering the motor (201), and a photovoltaic generator (104) for supplying the battery (108), the method comprising the steps of: determining a value representative of the power or solar energy entering through the aperture by a method according to any one of claims 1 to 9; and control the equipment (250) taking into account said representative value of the power or solar energy. The method of claim 10 wherein the equipment is a heating, ventilating or air conditioning system. Motorized concealment device (100) intended to be placed opposite an opening, the concealment device comprising a drive motor (201), an electric battery (108) for the power supply of the motor (201), and a photovoltaic generator (104) for supplying the battery (108), the concealment device (100) further comprising an electronic control and processing device (112) configured to implement a process according to any one of claims 1 to 9. System comprising: a concealment device (100) according to claim 12; equipment (250) external to the concealment device (100); and an electronic device adapted to control the equipment (250) taking into account the value of power or incoming solar energy determined by the occulting device (100).

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