FR3060634A1 - METHOD AND DEVICE FOR DETERMINING THE SOLAR POWER INTAKE BY 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 driving 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 following steps: 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 (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) deducing 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

Holder (s): ATOMIC AND ALTERNATIVE ENERGY COMMISSIONER Public establishment, BUBENDORFF SA Public limited company.

Extension request (s)

Agent (s): CABINET BEAUMONT.

FR 3 060 634 - A1 f54) METHOD AND DEVICE FOR DETERMINING OPENING.

The invention relates to a method of 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 supplying 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 opening from one or more measurements of the short-circuit current of the photovoltaic generator (104);

b) determining the position of the concealment device (100) and deducing therefrom the surface of the opening not obscured by the concealment device; and

c) deduct from said value representative of solar irradiation and from said unobstructed surface a value representative of the power or solar energy entering through the opening.

SOLAR POWER INCOMING THROUGH

METHOD AND DEVICE FOR DETERMINING THE SOLAR POWER INCOMING THROUGH AN OPENING

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 with a view to controlling building equipment accordingly.

Presentation of the prior art

International patent application WO2012 / 059673 describes an energy-independent motorized occultation device of the roller shutter type, this device comprising an electric motor for driving the shutter, an electric battery for supplying the motor, and a photovoltaic generator. to charge the battery from solar irradiation. A special 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 consequently control the opening or the shutter closing. Thus, the device is controlled automatically according to the sunshine.

However, this device does not make it possible to determine the power or solar energy entering the building through the opening in front of which it is mounted.

It would be desirable, in a building with 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 building equipment accordingly. , for example a heating system, a ventilation system or an air conditioning system.

summary

Thus, one embodiment provides a method of 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 of concealment comprising a drive motor, an electric battery for supplying the motor, and a photovoltaic generator for supplying the battery, 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;

b) determining the position of the concealment device and deducing therefrom the surface of the opening not obscured by the concealment device; and

c) deducing from said value representative of solar irradiation and from 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 concealment device is determined by 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 concealment device also takes account of a measurement of the open circuit voltage of the battery.

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

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

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

According to one embodiment, in step b), the position of the concealment device is determined by counting the number of rotational turns of a shaft of the drive 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 of the opening comprises a step of measuring the current flowing in the drive motor during an operating phase of the concealment device according to a reference movement predetermined.

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

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

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

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

Another embodiment provides for a system comprising:

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

Brief description of the drawings

These characteristics and advantages, as well as others, will be explained in detail in the following description of particular embodiments made without implied limitation in relation to the attached figures among which:

Figure 1 is a schematic perspective view of an example of a motorized occultation device according to one embodiment;

FIG. 2 is a block diagram of an example of an embodiment of a system adapted to determine the solar power or energy entering a building through an opening and to control equipment accordingly; and FIG. 3 is a block diagram illustrating steps of an example of an embodiment of a method for determining the power or solar energy entering a building through an opening and controlling equipment accordingly. detailed description

The same elements have been designated by the same references in the different figures and, moreover, 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 a motorized occultation device that is autonomous in energy may include have not been detailed, the embodiments described being compatible with the implementations such elements. In addition, the production of the electronic control and processing device 112 described below, suitable for implementing a method for determining incoming power or solar energy, and, if necessary, for controlling an equipment in taking into account the power or the incoming solar energy, has not been detailed, the production of such a device being within the reach of those skilled in the art from the functional indications of the present description. Unless specified otherwise, the expressions approximately, substantially, and of the order of mean to the nearest 20%, preferably to the nearest 10%.

Figure 1 is a schematic perspective view of an example of a motorized occultation device 100 according to one embodiment. In the example of FIG. 1, the device 100 is a device of the motorized roller shutter type.

The device 100 comprises an apron 102 constituted by an assembly of several blades, and further comprises a motorized shaft (not visible in FIG. 1) on which the apron 102 can be wound and from which the apron 102 can be unwound.

The device 100 further comprises a photovoltaic generator 104, comprising one or more photovoltaic panels. By way of example, the device 100 comprises a box 106 in which the motorized shaft is placed, the photovoltaic panel or panels of the photovoltaic generator 104 being arranged on the box 106.

The device 100 further comprises an electric battery 108 supplied with electrical energy by the photovoltaic generator 104 and supplying electrical energy to the device 100, and in particular the drive motor (not visible in FIG. 1) of the shaft. winding of the deck 102. By way of example, the battery 108 is placed in the box 106.

The device 100 further comprises an electronic control device 110 comprising one or more electronic circuits, making it possible in particular to control the motor of the device. By way of example, the control device 110 is placed inside the box 106.

The concealment device 100 is intended to be mounted in front of an opening (not visible in FIG. 1) of a building, capable of allowing light to pass through, for example in front of a window equipped with a transparent pane, so as to obscure completely the opening when it is in the closed position, and not to obscure the opening when it is in the open position. We are particularly interested here in the case of a concealment 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. .

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 screening device 100 is provided, provision is made for:

determining a value representative of the solar irradiation 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;

determining the rate of occultation of the opening by the device 100; and deducing from the value representative of the solar irradiation and from the rate of occultation of the opening a value representative of the solar power entering through the opening.

The determination of the incoming solar power can 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 placed inside the box 106 of the device 100. By way of example, the control and processing device 112 comprises electronic circuits common with the control device 110.

The incoming solar power can be calculated according to the following formula:

P = S * (100-To) * Irr * Fs, where P denotes the incoming solar power, in Watts, where S denotes the total area of the opening, in square meters, where To denotes the occultation rate of l aperture by device 100, in percent (S * (100-To) being the surface of the aperture not obscured by the occulting device), where Irr denotes the solar irradiation estimated by measuring the short-circuit current of the photovoltaic generator, in Watts per square meter, and where Fs is a constant without unit designating the solar factor, that is to say the coefficient of transmission of solar energy by the glazing closing the opening, which can by example be between 0.5 and 0.9 depending on the thickness and nature of the glazing.

By way of 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 generator short-circuit current 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 any other current measuring device. The value of the solar irradiation Irr can be determined directly from the value of the generator short-circuit current, for example by means of a predetermined correspondence table or by calculation from an analytical law of predetermined correspondence. . 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 in particular detailed in patent application WO2012 / 059673 mentioned above.

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

As a variant, to simplify the installation of the device 100 and limit the risk 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 blinding device of the rolling shutter type, it can indeed be shown that there is a relationship between the torque C on the motor shaft of the device and the total surface area S _v of the shutter in the closed state, which is generally substantially equal to the area S of the opening.

More particularly, for each model of component, we can determine a law f such that S _v = f (C).

This law f is generally of the type f (C) = a * c2 + b * C, where a and b are coefficients depending on the flap model considered.

We also know that for a given engine, 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, provision can be made to measure the current I flowing in the motor during an operating phase of the motor, and to deduce therefrom the total area 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 a such that S = a * 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 motor torque C, and therefore the motor current I, depend on the position of the shutter. To estimate the area S of the opening, provision is therefore made to measure the motor current I for a predetermined movement of the shutter, corresponding to a reference movement for which the law g has been determined.

For 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 complete winding phase of the shutter from its closed position to its open position. . In this case, the reference movement considered is the passage of the flap through its point of maximum 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 for determining the total surface 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 ίο

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 occultation device 100. For this, the occultation device 100 can comprise one or more sensors of the position of the flap, 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 measurements of the engine running time from a known initial position, for example the fully open position or the completely device closed. For this, the control and processing device 112 may include a memory (not detailed) adapted to memorize a value representative of the position of the shutter, for example a value ranging from 0 when the shutter is fully closed to 1 when the shutter is fully open. Each time the shutter is actuated by the user, the control and processing device 112 detects the direction of rotation of the shutter, measures the stroke time of the shutter, and updates accordingly the 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 concealment of the opening by the device 100.

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

As a variant, the position of the concealment device can be determined by counting the number of complete turns (rotation of 360 degrees) of the shaft of the shutter drive motor from a known initial position, for example the position completely open or fully closed position of the device. For this, the control and processing device 112 can, each time the shutter is actuated by the user, detect the direction of rotation of the shutter, count the number of complete turns of the motor shaft, for example by means of an encoder wheel or any other suitable sensor, and update accordingly a 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 concealment 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 motor torque of the device. Indeed, as indicated above, the motor torque depends on the position of the shutter. Measuring the instantaneous motor torque can thus make it possible to know the position of the flap. As described above, the motor torque can be deduced from the current flowing in the motor. Thus, the control and processing device 112 can be configured to, on each actuation of the shutter by the user, measure the current flowing in the motor and deduce therefrom a value representative of the position of the shutter. The law making it possible to determine the position of the flap 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 estimation of the position of the flap, 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 motor torque can depend on the voltage delivered by the battery, which can 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 is configured to, on each actuation of the shutter by the user, measure the open circuit voltage of the battery, and update the value representative of the position of the shutter taking into account the motor torque and the open circuit voltage of the battery.

Alternatively, the flap position can be estimated by taking into account a combination of race time measurements, engine torque measurements, and, if necessary, open circuit voltage measurements of battery.

The calculation of instantaneous incoming power 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 quantity P. By way of example, the power P can be recalculated at each change of position of the shutter and / or each time that a significant variation in the short-circuit current of the photovoltaic generator 104 (and therefore of the solar irradiation) is detected. By way of example, the control and processing device 112 measures periodically, 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 generator short-circuit current varies by more than 20 to 40 percent, for example by 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 time integration of the power P.

As an 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 patent application WO2012 / 059672. This allows for example to anticipate the programming of a heating equipment, by reducing the power of the heating in a period which follows a sunny day.

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 equipment accordingly.

FIG. 2 represents more particularly a block 104 diagramming the photovoltaic generator of the occultation device 100 of FIG. 1, a block 108 diagramming the battery of the occultation device 100, a block 201 diagramming the motor (not visible in the figure 1) of the occultation device 100, a block 112 diagrammatically showing the control and processing device of the occultation device 100, and a block 250 diagramming an equipment external to the occultation device 100.

The device 100 includes 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 link 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 suitable for controlling the insulation of the photovoltaic generator 104, that is to say the interruption of the electrical link 203 between the generator 104 and the battery 108, during the implementation of a current measurement generator short circuit 104.

In this example, the device 100 further comprises an electrical connection 209 between the battery 108 and the control and processing circuit 112, allowing in particular the circuit 112 to measure the voltage of the battery 108. The control and processing circuit 112 is for example suitable for controlling the insulation of the battery 108, that is to say the interruption of the 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, when implementing 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 therefrom. engine.

The system of FIG. 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 measurements of incoming solar power and / or of incoming solar energy to the equipment 250 via the link 213, or to control the equipment 250 taking account of the power measurements. incoming solar and / or incoming solar energy via link 213.

For example, the equipment 250 can be a heating, ventilation or air conditioning system, the control or programming of which is adjusted to take account of the solar power or of the solar energy entering the building or the room. concerned with the building by the opening.

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

The method of FIG. 3 comprises a phase 301 of determining the total area S of the opening in front of which the concealing device 100 is mounted.

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

The method further comprises a phase 303 of determining the position of the concealment device, with a view to determining the rate of concealment To of the opening by the device.

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

The method of FIG. 3 further comprises a step 305 of calculating the unobstructed area of the opening, corresponding to the product of the total area S by the occultation rate To, from the area and rate values d 'occultation determined during phases 301 and 303.

The method of FIG. 3 further 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 account of the short-circuit current measurement carried out at step 307.

The method of FIG. 3 comprises a step 311 of calculating the solar power P entering through the opening, taking into account the solar irradiation Irr determined in step 309, of the unobstructed surface of the opening determined at step 305, and, where appropriate, the solar factor or transmission coefficient Fs of the opening.

The method may also include a step 313 for calculating the solar energy entering through the opening, corresponding to a temporal integration of the incoming solar power, and a step 315 for controlling external equipment taking account of the measurement. of solar power or solar energy produced.

Particular embodiments have been described. Various variants and modifications will appear to those skilled in the art. In particular, the embodiments described are not limited to the aforementioned examples of equipment that can be controlled taking into account the measurement of solar power or incoming solar energy. More generally, the embodiments described 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 system of automatic watering of plants inside the building. As a variant, the embodiments described can be applied to concealment devices for glass-like openings of the greenhouse type, or for windows of an animal breeding 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 screening device of the type described above, one can estimate the total solar energy entering the building.

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

Claims (15)

1. 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 device occultation 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 following steps: 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 (104); b) determining the position of the concealment device (100) and deducing therefrom the surface of the opening not obscured by the concealment device; and c) deducing from said value representative of solar irradiation and from said unobstructed surface a value representative of the power or solar energy entering through the opening. 2. Method according to claim 1, in which, 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 known position of origin. 3. Method according to claim 2, in which, in step b), the determination of the position of the concealment device (100) also takes account of a measurement of the open circuit voltage of the battery (108 ). 4. Method according to any one of claims 1 to 3, wherein, in step b), the position of the concealment device (100) is determined taking into account a measurement of the current flowing in the motor d 'training (201). 5. 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 of the engine operating time d drive (201) and a measurement of the current flowing in the drive motor (201). 6. Method according to any one of claims 1 to 5, wherein, in step b), the position of the concealment device (100) is determined from one or more position sensors. 7. Method according to 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 rotations of a motor shaft drive (201) of the device from a known position of origin. 8. Method according to any one of claims 1 to 7, in which step b) comprises a step of determining the total area of the opening in front of which the concealment device (100) is mounted. 9. The method of claim 8, wherein the step of determining the total area of the opening comprises a step of measuring the current flowing in the drive motor (201) during an operating phase of the device d occultation (100) according to a predetermined reference movement. 10. A method of controlling equipment (250) taking into account the power or solar energy entering through an opening equipped with a motorized occultation device (100), the occultation device comprising a motor d drive (201), an electric battery (108) for supplying the motor (201), and a photovoltaic generator (104) for supplying the battery (108), this process comprising the following steps: determining a value representative of the power or solar energy entering through the opening by a method according to any one of claims 1 to 9; and controlling the equipment (250) taking into account said value representative of power or solar energy. 11. The method of claim 10, wherein the equipment is a heating, ventilation or air conditioning system. 12. Motorized occultation device (100) intended to be placed opposite an opening, the occultation device comprising a drive motor (201), an electric battery (108) for the power supply for the motor (201), and a photovoltaic generator (104) for supplying the battery (108), the concealment device (100) comprising 10 in addition to an electronic control and processing device (112) adapted to determine a value representative of the power or of the solar energy entering through the opening by a method according to any one of claims 1 to 9. 13. System comprising: 15 a concealment device (100) according to claim 12; equipment (250) external to the concealment device (100); and an electronic device suitable for controlling 20 the equipment (250) taking into account the value of incoming solar power or energy determined by the concealment device (100). B15545 DD17331SD 2/3