EP4169264A1

EP4169264A1 - Solar-powered sound-producing system

Info

Publication number: EP4169264A1
Application number: EP21740133.0A
Authority: EP
Inventors: Julien FEUILLET
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-18
Filing date: 2021-06-18
Publication date: 2023-04-26
Also published as: FR3111755A1; WO2021255399A1; FR3111755B1

Abstract

The invention relates to a sound-producing system (410) comprising: a woofer enclosure (412) equipped with at least one loudspeaker (414) for low frequencies; a holding structure (420) arranged above the woofer enclosure (412); a power source comprising at least one photovoltaic panel (424) securely fastened to the holding structure (420); a tweeter enclosure (416) fastened to the holding structure (420) and equipped with a loudspeaker (418) for high and medium frequencies; a region for power equipment (440) comprising a supply regulator, a rechargeable battery (230), and an inverter (280); and a region for electronic equipment (450) comprising an audio amplifier (260) that is supplied with DC current and DC voltage and that is electrically connected to the loudspeakers (414, 418).

Description

Title of the invention: Solar powered sound production system

Technical field of the invention

The present invention relates to the technical field of sound production. It applies, in particular, to a self-powered mobile system particularly suited for outdoor musical gatherings such as festivals.

Prior art

[0002] It is common practice to use portable acoustic speakers comprising in particular at least one amplifier, receiving a sound signal from one or more music accessories such as digital or analog turntables, or even musical instruments, these accessories being directly connected on the amplifier. Power for these portable loudspeakers is usually taken directly from the home network, forcing them to be used near an electrical outlet or to the use of extension cords.

[0003] An attempt has already been made to solve these problems by introducing batteries, sometimes rechargeable, into loudspeakers. The autonomy of these loudspeakers limits their use in energy autonomy to a few hours before having to recharge the batteries. In addition, the known solutions of loudspeakers involving batteries do not provide a suitable power supply for music accessories such as turntables. Other solutions relating to the use of generators or photovoltaic panels making it possible to supply energy to rechargeable batteries have also been developed. The integration of these photovoltaic panels is generally made to the detriment of the ergonomics of use of such portable speakers and does not allow autonomy and optimal acoustic rendering in outdoor use conditions, in particular by a degraded energy efficiency of the system. that is, relative to energy conversion and acoustic efficiency. Presentation of the invention

The present invention aims to remedy these drawbacks with a completely innovative approach.

[0005] To this end, according to a first aspect of the invention, an electronic device of a sound production system comprises a solar energy source comprising at least one photovoltaic panel, a power supply regulator of the type followed by the point maximum power electrically connected to the power source, a rechargeable battery electrically connected to the power regulator and configured to provide stabilized DC voltage and current power, a DC powered class D power audio amplifier electrically connected directly to the rechargeable battery; and an inverter connected directly to the rechargeable battery and configured to supply AC voltage and current.

[0006] By virtue of these provisions, the device according to the invention provides a supply of voltage and alternating current, via the presence of the inverter, connected to the rechargeable battery. It is thus possible to supply power to external devices, such as a personal computer. In parallel, it is possible to have a voltage and direct current power supply, making it possible in particular to supply the class D power audio amplifier. A major difference with the prior art is the direct connection of the amplifier. on the battery, not on the UPS. No transformation into direct current and voltage, via the inverter and then for example an internal transformer of the amplifier, generally involving an efficiency share of 30% on average, is then necessary.

[0007] In addition, the direct connection of the amplifier to the battery has the advantage of not constraining the choice of an inverter as a function of the power required during implementation of the device. For example, during a gig, it may be necessary to provide peaks of up to 24dB, which involves an inverter sized accordingly. The arrangement according to the invention therefore makes it possible to reduce the costs, by the use of smaller-dimensioned equipment, as well as by the economy of electronic elements. Another important advantage provided by this type of direct connection of the amplifier to the battery is the simplification of the energy chain, the elements between the energy source and the acoustic source being reduced as much as possible. This results in increased reliability of the device, and moreover any malfunction can be quickly identified, the number of elements that may be faulty being limited to the maximum.

[0009] Finally, such a connection eliminates the need for an inverter when the external devices have their own power supply (battery, etc.). Advantageously, the inverter can be selectively turned off or on, so as to be able to power an external device when necessary. As a result, consumption in standby mode can be reduced, which has a significant effect on the autonomy of the device.

The invention is implemented according to the embodiment and the variant set out below.

Advantageously, the electronic device can further comprise means for monitoring the state of health of the rechargeable battery electrically connected to the rechargeable battery, the means for monitoring the state of health of the rechargeable battery being configured to calculating the remaining autonomy of the rechargeable battery as a function of the electric power supplied by the photovoltaic panel, the power consumed and the state of charge of the rechargeable battery.

According to a second aspect of the invention, a sound production system comprising the electronic device described above comprises a box, called a subwoofer, equipped with at least one low-frequency acoustic enclosure, a support structure arranged above the subwoofer, the solar energy source comprising at least one photovoltaic panel integral with the supporting structure, another subwoofer called the treble box, fixed to the supporting structure and equipped with at least one acoustic enclosure medium and high frequencies, a power supply equipment zone comprising the power supply regulator, the rechargeable battery and the inverter, an electronic equipment zone comprising the audio power amplifier electrically connected to the at least one loudspeaker of the subwoofer and at least one loudspeaker of the subwoofer.

The invention is implemented according to the embodiments and variants set out below, which are to be considered individually or in any technically operative combination.

Advantageously, the sound production system can include support rods extending vertically from the subwoofer to the support structure, the support rods supporting the raised support structure without contact over the box bass, and a free space between the support structure and the subwoofer comprising a surface called installation surface defined by a panel arranged above the subwoofer and without direct contact with the subwoofer.

Advantageously, the electronic equipment area can further include the means for monitoring the state of health of the rechargeable battery.

Advantageously, the means for monitoring the state of health of the rechargeable battery can comprise a display configured to display the remaining autonomy of the rechargeable battery as a function of the electric power supplied by the photovoltaic panel, the power consumed and the state of charge of the rechargeable battery.

Advantageously, the means for monitoring the state of health of the rechargeable battery may include a wireless interface configured to communicate with an information display device.

Advantageously, the area of electronic equipment can include at least one AC voltage and current power plug electrically connected to the inverter.

Advantageously, the power supply equipment area can include at least one DC voltage and current power plug electrically connected to the rechargeable battery.

Advantageously, the supporting structure may include guide means allowing the at least one photovoltaic panel to slide over the treble box so as to free the installation surface and to form a shelter over it. the installation surface. Advantageously, the solar energy source can comprise two photovoltaic panels each comprising one end cooperating with the guide means, and a free end so as to be able to move each photovoltaic panel from a position along the sound production system according to a vertical direction to a position over the tweeter in a horizontal direction.

Advantageously, the power equipment area can be arranged under the subwoofer, and the electronic equipment area can be arranged behind the at least one enclosure of the subwoofer.

Advantageously, the power equipment area and the electronic equipment area can be grouped together in a single mobile unit.

Brief description of the figures

Other advantages, aims and characteristics of the present invention emerge from the following description given, for explanatory and in no way limiting, with reference to the accompanying drawings, in which:

[0025] [Fig. 1] Figure 1 is a schematic view of a sound production system in operational mode according to a first embodiment of the invention.

[0026] [Fig. 2] Figure 2 is a schematic view of a sound production system of Figure 1 in transport mode.

[0027] [Fig. 3] Figure 3 is a schematic view of an electronic device of the sound production systems of the invention.

[0028] [Fig. 4] Figure 4 is a schematic front view of a sound production system in operational mode according to the first embodiment of the invention, and a transparency view of an electronic device of the sound production system.

[0029] [Fig. 5] Figure 5 is a schematic side view of the sound production system of Figure 4.

[0030] [Fig. 6] FIG. 6 is a schematic view of a sound production system in operational mode according to a second embodiment of the invention, and a transparent view of an electronic device of the sound production system.

Description of the embodiments

The sound production system must be designed to obtain the best acoustic performance for use on an outdoor stage, in particular for animating music festivals. The optimization of the mechanical design combined with that of the electronics maximizes the acoustic performance as well as the energy balance of the sound production system.

[0032] To this end, a first aspect of the invention comprises the optimization of the mechanical design of a sound production system to obtain maximum acoustic performance and therefore optimized acoustic rendering in outdoor conditions. External constraints may include the presence of a large number of spectators in a space generally devoid of characteristics favorable to the propagation of sound such as can be found in concert halls, and a space also constrained by climatic conditions. .

According to Figure 1, the sound production system 10 is shown in an operational mode of operation. In operational mode, the sound production system 10 is generally of parallelepiped shape comprising a height H beyond two meters while remaining less than two meters and fifty centimeters. By way of non-limiting example, the sound production system 10 shown also comprises a length L of less than two meters, more particularly of the order of one meter and ninety centimeters, and a width or even depth P less than one meter and fifty centimeters, more particularly of the order of one meter and thirty centimeters.

According to Figure 1, the sound production system 10 comprises a first lower part, called acoustic box arranged fixed in a rigid structure of the exoskeleton type, equipped, by way of non-limiting example, with an enclosure 14 dedicated to the low frequency range of audible audio sounds producing bass sounds. This subwoofer is also called a subwoofer 12. It will be appropriate that the subwoofer 12 can include several speakers dedicated to the low frequency range. The subwoofer 12 is generally of parallelepiped shape. The subwoofer 12 is arranged as close as possible to the ground so as to promote the propagation of acoustic waves relating to the low frequency range, at ground level for an acoustic rendering comparable to a wave of vibrations coming from the ground. In the remainder of the invention, the front face of the sound production system 10 will be referred to as the face of the box towards which the enclosure 14 of the subwoofer 12 is oriented.

According to Figure 1, the sound production system 10 also comprises, by way of non-limiting example, one or more speakers 18 dedicated to the audio range of medium and high audible frequencies producing high-pitched sounds, said speaker 18 being also oriented towards the front face of the sound production system 10. The loudspeaker 18 of the treble sounds is arranged in a box, called the treble box 16, different from the subwoofer 12 and placed in height relative to the subwoofer 12. The treble box 16 is generally parallelepipedal and is fixed to a support structure 20 integral with the rigid structure of the exoskeleton type. It will be appropriate that according to the invention, the treble box 16 can include several loudspeakers for the treble sounds.

According to the invention, in operational mode as shown in Figure 1, the treble box 16 is raised above the subwoofer 12 by support rods 22 of the support structure 20 so as to release a free space between the subwoofer 16 and the subwoofer 12. The support rods 22 extend vertically from the periphery of the subwoofer 12 to the four tops of the support structure 20 of the subwoofer 16, more particularly, the support rods 22 extend vertically from the four tops of the bottom of the subwoofer 12 to the four tops of the support structure 20 of the subwoofer 16.

The free space includes a panel remote from the subwoofer forming a first surface, preferably flat. This first surface, called installation surface 30, allows in particular the installation of audio equipment such as for example analog or digital turntables necessary for the production of music. Said first surface is not in contact with the subwoofer 12 so as to be free from the vibrations of the subwoofer 12 when the sound production system 10 is in sound production mode.

Preferably, the treble box 16 is arranged at a height greater than two meters so as to allow propagation of the treble acoustic waves optimized over all the spectators. For example, a height H of two meters and thirty centimeters is a good compromise, this height H is high enough for good acoustic rendering and remains accessible to an operator of the sound production system 10.

According to Figure 1, the supporting structure 20 of the treble box 16 comprises a generally rectangular photovoltaic panel 24 allowing the use of solar energy as the sole source of energy external to the sound production system 10. According to the Figure 1, the photovoltaic panel 24 is arranged horizontally and flat so as to cover the support structure 20, thus forming a shelter over the installation surface 30 allowing for example protection of audio equipment arranged on the surface installation 30. The high position of the treble box 16 also makes it possible to optimize the available power of the photovoltaic panel 24 by optimizing the position of the solar collectors of the photovoltaic panel 24, above the spectators and an operator of the system. sound production 10, and thus avoid as much as possible the shaded areas due to spectators and operators of the sound production system 10. It should be noted that the failure to the photovoltaic 24 is integral with the rigid structure comprising the subwoofer 12 and the treble box 16, so that in the event of the need to move the sound production system 10, for example in the event of a search for greater brightness, the photovoltaic panel 24 moves with the assembly. The photovoltaic panel 24 allows the charging of at least one rechargeable battery on board the rigid structure of the sound production system 10. According to Figure 1, the sound production system 10 comprises wheels 26 in contact with the ground so as to make the sound production system 10 mobile when it is in operation or not in operation. Traction means of the sound production system 10, such as, for example and without limitation, a traction rod equipped with a handle, can be fixed on the sound production system 10 so as to facilitate its movement by actuating directional wheels.

According to Figure 2, the sound production system 10 is shown in a mode called mode of transport. The same references as those of FIG. 1 are used to designate the structural elements of the sound production system 10 in transport mode. According to Figure 2, the so-called transport mode is a mode in which the sound production system 10 is compacted in order to reduce its size. As an indication, in transport mode, the sound production system 10 maintains the same length L and the same depth P as in operational mode. The height H ’of the production system is reduced to a dimension of the order of one meter and fifty centimeters. The transport mode sound production system 10 differs from the operational sound system 10 essentially in that the support structure 20 is lowered closer to the subwoofer 12, the support rods 22 being telescoping rods.

To this end, according to Figure 2, the free space comprising the installation surface 30 is reduced so as to no longer be functional, that is to say so as to no longer be able to offer a ergonomic space for the arrangement of audio accessories such as for example mixers or other accessories. Also, the treble box 16 is lowered overall to the level of the subwoofer 12 so that the acoustic rendering of both the bass enclosure 14 and the treble enclosure 18 would be affected, the audio frequencies of the treble can be stopped by obstacles. Also, the energy source comprising the photovoltaic panel 24, would be located at a height of less than one meter fifty, and therefore could not optimally receive the solar rays due to shadow caused by the immediate proximity of an operator. or other obstacles greater than meter fifty. According to Figure 3, an electronic device 200 of the sound production system 10 comprises an energy source 210 comprising one or more photovoltaic panels 24 integral with the sound production system 10. The photovoltaic panel or panels 24 are photovoltaic panels 24 with high energy efficiency making it possible to supply several hundred peak watts to the sound production system 10. By way of non-limiting example, the energy source 210 allows a peak power of the order of three hundred watts according to a maximum voltage of the order of thirty-five volts and a maximum current of the order of nine amperes, this power level being sufficient for the constraints of use according to the invention. According to the invention, in order to regulate the voltage and the current necessary for the rechargeable battery 230 of the sound production system 10, a power supply regulator 220 of the SPMP type, that is to say for monitoring the maximum point of power 'or according to the English acronym' MPPT 'for' maximum power point tracking ', is electrically connected between the energy source 210 and the rechargeable battery 230. By way of nonlimiting example, the power supply regulator 220 SPMP allows voltage regulation allowing the rechargeable battery 230 to be charged between about twenty and thirty volts for a maximum current of the order of about fifteen amperes.

According to Figure 3, the sound production system 10 comprises from the rechargeable battery 230, a stable power supply 240 in direct voltage and direct current allowing, for example and without limitation, to provide approximately a direct voltage of twenty at thirty volts depending on the state of charge of the rechargeable battery 230 for a capacity of ninety amps per hour. For this purpose, the sound production system 10 comprises a DC power plug 250 electrically connected to the rechargeable battery 230 and allowing the supply of DC voltage and current accessories compatible with the DC voltage and current delivered by the battery. rechargeable 230.

The stabilized power supply 240 directly allows the power supply of an audio amplifier 260 of power making it possible to distribute an amplified audio signal 270 to the speakers 14, 18 of the sound production system 10 and also the power supply of an inverter 280 , common type direct / alternating current, configured to supply a power supply of the type of voltage and alternating current 290 adapted for the connection of audio accessories 300 such as mixing consoles, musical instruments, digital or analog turntables, or even a computer. The inverter 280 is configured to deliver a similar AC voltage and current type power 290 to the home power grid. For this purpose, the sound production system 110 may include an AC voltage and AC power plug 320 electrically connected to the inverter 260, the AC voltage and AC power plug 320 allowing easy connection of the audio accessories 300 Protection by a standard differential circuit breaker, for example thirty milliamperes, makes it possible to ensure the safety of the users of this power plug with alternating current and voltage 320.

Unlike the known power audio amplifiers on the market which are supplied with voltage and alternating current, the audio amplifier 260 integrated into the sound production system 10 is an audio amplifier supplied with voltage and direct current, thus presenting a much better more energy efficient than amplifiers on the market. The audio amplifier 260 makes it possible to deliver a power of several hundred watts to the acoustic speakers 14, 18 which can, for example and without limitation, reach up to more than six hundred watts in continuous average power also called according to the acronym Anglosaxon, RMS power (root mean square). The power amplifier is preferably a so-called class D amplifier comprising a programmable signal processing logic, commonly called DSP according to Anglo-Saxon terminology for “digital signal processing”. In other words, the audio amplifier 260 comprises a programmable equalizer or timbre corrector making it possible to filter or amplify different frequency bands of the audio signals intended for the acoustic speakers 14, 18 of the sound production system 10. The audio amplifier 260 allows to interface audio connectors of different types, such as for example multi-point audio connectors of the 2-point, 4-point or 8-point type allowing signals to be broadcast of different amplified frequency bands, this is called multi-amplified broadcasting, or even such as multi-point audio connectors of the 3 to 7-pin type allowing the balancing of an audio signal in order to render inoperative the interference induced by the transport of the signal near electrical and electronic devices. This latter type of connector also allows the transmission of digital signals.

The inverter 280 of the sound production system 10 is powered by the stabilized power supply 240 and unlike the inverters powered by a heat engine, allows to have a power supply with alternating current and voltage 290 without producing annoying noise and interfering with the sound distribution of the sound production system 10.

The sound production system 10 also comprises means 310 for monitoring the state of health of the rechargeable battery 230 electrically connected to the rechargeable battery 230 and comprising a display making it possible to view the information relating to the state of health. of the battery, that is to say more particularly, its state of charge, its voltage, the current delivered. The means 310 for monitoring the state of health of the rechargeable battery 230 may comprise known devices for measuring the voltage and current of the battery as well as means for calculating the state of charge of the rechargeable battery and of the battery. 'remaining autonomy of the rechargeable battery as a function of the electric power supplied by the rechargeable battery and therefore consumed by the sound production system 10 and the energy production of the photovoltaic panel 24. Advantageously, the monitoring means 310 of the The state of health of the rechargeable battery 230 are configured to indicate the remaining autonomy of the rechargeable battery 230 in real time as a function of the electrical power consumed by the sound production system 10. Alternatively, the monitoring means 310 of the state of health of the rechargeable battery include a wireless communication interface so as to be able to communicate the relative information in the state of health of the rechargeable battery to an information display device such as, for example and without limitation, a smartphone-type mobile phone provided with a screen. To this end, the display allows you to view the information relating to the state of health of the rechargeable battery can be deleted and substituted by the hand-held information display device.

According to FIG. 4 and according to FIG. 5, the rechargeable battery elements 230, power supply regulator 220 of the SPMP type, audio amplifier 260, inverter 280 and means 310 for monitoring the state of health of the rechargeable battery 230 are arranged integrally with the structure of a sound production system 410. The sound production system of FIG. 4 and of FIG. 5 comprises an enclosure 414 dedicated to the range of audible low frequencies arranged in the subwoofer. bass 412, several speakers 418 dedicated to the audio range of high audible frequencies and an enclosure 419 dedicated to the audio range of audible medium frequencies arranged in the treble woofer 416. In general, the sound production system 410 can include one or more several speakers dedicated to the low frequency audio range, the medium frequency audio range and the high frequency audio range. According to the invention, the treble speakers 418 and the midrange speakers 419 can also be arranged coaxially.

FIG. 4 and FIG. 5 illustrate by transparency, respectively from a front view and a profile view, the arrangement of the electronic device 200 in the sound production system 410. The particular arrangement makes it possible not to affect the acoustic performance of the sound production system 410 while optimizing its energy efficiency and while offering ergonomics of use in line with the constraints of use of such a sound production system 410.

For this purpose, a first group of elements said group of supply elements, comprising the power supply regulator 220 of the SPMP type, a battery pack comprising at least the rechargeable battery 230 and the inverter 280, is arranged in the lower part of the sound production system 410, preferably in an area arranged under the subwoofer 412. More particularly a minimalist space, called the power supply equipment area 440, arranged under the subwoofer 412, allows the group of power supply elements to be arranged therein so as not to favor access to these elements, these power supply elements not having to be handled when using the sound production system 410. It It should be noted that the electrical connection between the energy source 210 comprising one or more photovoltaic panels 424 and the power supply regulator 220 of the SPMP type is made by an insulated electrical cable extending vertically from the energy source 210 to the top of the sound production system 410 to the power supply regulator 220 SPMP arranged in the power equipment area 440. Preferably, this insulated electric cable is arranged and fixed along one of the support rods 422 of the device. the holding structure 420. The power supply equipment area 440 also includes the DC power plug 250 electrically connected to the rechargeable battery 230.

According to Figure 5, a second group of elements said group of electronic elements is arranged in an area of electronic equipment 450 located at the rear of the speakers 414 of the subwoofer 412, below the surface of installation 430. This group of electronic elements comprises in particular the audio amplifier 260, the means 310 for monitoring the state of health of the rechargeable battery 230 as well as the power plug 320 supplying the current and the alternating voltage of output of the inverter 280. Preferably, the power plug 320 is a conventional female plug of the household outlet type, allowing the connection of a standard male power plug. The arrangement of this group of electronic elements at the rear of the speakers 414 of the subwoofer 412 allows their easy access in order, for example, to connect audio sources to the amplifier and to supply them via the power plug 320 with alternating current and voltage. Visual access to the display of the means 310 for monitoring the state of health of the rechargeable battery 230 is also guaranteed by this arrangement. The electronic equipment zone 450 can also comprise a plurality of indicator lights arranged on the audio amplifier 260 which can, for example and in a nonlimiting manner, indicate the setting. amplifier, reception of audio signals or an audio signal saturation level.

In general, the arrangement of the group of power supply elements and of the group of electronic elements outside the free space between the treble box 416 and the subwoofer 412, makes it possible to preserve the surface 430 free installation for the addition of any other audio equipment.

According to Figure 6, a sound production system 110 of a first alternative to the sound production system 10 of Figure 1 is shown. Treble and midrange speakers 118 are arranged, for example and in a nonlimiting manner, one above the other and form a vertical panel 180 fixed at its upper end on the support structure 120 and oriented towards the face. front of the sound production system 110. According to the invention, the treble and medium speakers 118 can also be arranged in a coaxial manner. In a functional position, the panel comprising the treble and midrange speakers 118 can be tilted so that the treble and midrange speakers 118 are slightly oriented towards the ground so as to be able to produce acoustic waves in the direction of the audience. The mobility of the sound production system 110 is guaranteed by two wheels. By way of non-limiting example, the length L _x of the sound production system 110 of FIG. 6 is less than one meter, more particularly of the order of eighty-five centimeters, and a depth P ₁ less than sixty. ten centimeters, more particularly of the order of sixty-five centimeters. The height H _x of the sound production system 110 of FIG. 6 is for example and in a nonlimiting manner beyond two meters while remaining less than two meters and fifty centimeters.

It should be noted in particular that according to Figure 6, the photovoltaic panel 24 of the system of Figure 1 has been replaced by two photovoltaic panels 124, 125 generally rectangular. Each photovoltaic panel 124, 125 can be arranged in a position varying from a vertical position PV, along one of the two lateral faces 170, 172 of the sound production system 110, to a horizontal position PH flat resting on the support structure 120 of the treble box 116, so as to best adapt to the angle of incidence of the light rays coming from the sun. To this end, the support structure 120 may include guide means 174 such as a slide device allowing each photovoltaic panel 124, 125 to slide over the treble box 116 and also form a shelter over the installation surface 130. More particularly, each photovoltaic panel comprises an end 176 cooperating with the guide means 174, that is to say for example, an end 176 arranged movably in a guide rail, and a free end 178 so that an operator can move each photovoltaic panel 124, 125 from a position along the sound production system 110 in a vertical direction to a position over the treble box 116 in a horizontal direction.

The sound production device 110 may comprise means for adjusting the inclination of the photovoltaic panels 124, 125 from their vertical position PV to their horizontal position PH such as for example a support device associated with each photovoltaic panel 124, 125 allowing the best possible adjustment of the position of the photovoltaic panels 124, 125. The orientation of the two photovoltaic panels 124, 125 allows an increase in the solar energy captured for recharging the rechargeable battery of the sound production system 110 by comparison with the sound production system 10 of FIG. 1 or of FIG. 2. Preferably, according to a compromise between the energy requirement and the size of the sound production system 110, the wheelbase of the two photovoltaic panels 124, 125 placed end to end horizontally and flat is of the order of two meters, for example and without limitation, according to Figure 6, two meters and fifteen hundred imeters. The system for fixing the photovoltaic panels 124, 125 makes it possible to obtain a length L _x of the sound production system 110 smaller than the length L of the sound production system 10 of FIG. 1 and of FIG. 2.

[0057] According to figure 6, although the arrangement of the group of supply elements and of the group of electronic elements may be similar to that of figures 4 and 5, alternatively, the production system Sound 110 of FIG. 6 comprises a mobile electronic unit 190 comprising both the group of supply elements and the group of electronic elements. In other words, in which the supply equipment zone 440 and the electronic equipment zone 450 are grouped together within a single mobile unit 190. This alternative makes it possible to divide the weight of the production system into two parts. sound 110 so as to facilitate its movement and also allows flexibility of use of the sound production system 110.

The mobile electronic unit 190 comprises in particular connection means configured to recharge the rechargeable batteries 230 supplying energy to the power supplies and to the electronic equipment either from the energy source comprising the photovoltaic panels 124, 125 of the sound production system 110, or from an energy source external to the sound production system 110.

It must be understood that the detailed description of the subject of the invention, given solely by way of illustration, does not in any way constitute a limitation, the technical equivalents also being included in the scope of the present invention. .

Claims

Claim 1. Electronic device (200) of a sound production system (10) comprising: a solar energy source (210) comprising at least one photovoltaic panel (24), a power regulator (220) of the tracking type of the maximum power point electrically connected to the power source (210), a rechargeable battery (230) electrically connected to the power regulator (220) and configured to provide a stabilized power supply (240) at direct current and voltage, a DC powered class D power audio amplifier (260) electrically connected directly to the rechargeable battery (230), an inverter (280) connected directly to the rechargeable battery (230) and configured to provide power (290) at voltage and alternating current. Claim 2. Electronic device (200) according to the preceding claim further comprising means for monitoring (310) the state of health of the rechargeable battery (230) electrically connected to the rechargeable battery (230), the monitoring means ( 310) of the state of health of the rechargeable battery (230) being configured to calculate the remaining runtime of the rechargeable battery (230) based on the electric power supplied by the rechargeable battery (230) and its power source solar (210). Claim 3. Sound production system (10, 110, 410) comprising the electronic device (200) of any one of the preceding claims and comprising: a box, said subwoofer (12, 412), equipped with at least a low-frequency acoustic enclosure (14, 414), a support structure (20, 420) arranged over the subwoofer (12, 412), the solar energy source (210) comprising at least one photovoltaic panel (24, 424) integral with the support structure (20, 420), another box known as the treble box (16, 416), fixed to the support structure (20, 420) and equipped with at least one enclosure ( 18, 418) acoustics of medium and high frequencies, a power equipment zone (440) comprising the power regulator (220), the rechargeable battery (230) and the inverter (280), an electronic equipment zone (450) comprising the audio amplifier ( 260) of power electrically connected to the at least one acoustic enclosure (14, 414) of the subwoofer (12, 412) and to the at least one acoustic enclosure (18, 418) of the subwoofer (16, 416) ).

Claim 4. A system (10, 110, 410) according to the preceding claim further comprising support rods (22, 422) extending vertically from the subwoofer (12, 412) to the support structure (20). , 420), the support rods (22, 422) supporting the non-contact raised support structure (20, 420) over the subwoofer (12, 412), a free space between the support structure (20, 420) and the subwoofer (12, 412) comprising a surface called the installation surface (30, 430) defined by a panel arranged above the subwoofer (12, 412) and without direct contact with the subwoofer. bass (12, 412).

Claim 5. System (10, 110, 410) according to any one of claims 3 or 4, according to which the area of electronic equipment further comprises the means (310) for monitoring the state of health of the rechargeable battery ( 230).

Claim 6. System (10, 110, 410) according to the preceding claim for which the means for monitoring (310) the state of health of the rechargeable battery (230) comprises a display configured to display the remaining battery life. rechargeable (230) according to the electric power supplied by the rechargeable battery (230) to the sound production system (10).

Claim 7. A system (10, 110, 410) according to any one of claims 3 to 6 for which the electronic equipment area (450) comprises at least one electrically connected AC voltage and current power plug (320). to the inverter (280).

Claim 8. A system (10, 110, 410) according to any one of claims 3 to 7 for which the supply equipment area comprises at least one DC voltage and current power plug (250) electrically connected to the rechargeable battery (230).

Claim 9. System (10, 110, 410) according to any one of claims 3 to 8 for which the retaining structure (20, 420) comprises guide means (174) making it possible to slide the at least one panel. photovoltaic (24, 424) over the treble box (16, 416).

Claim 10. System (10, 110, 410) according to the preceding claim for which the solar energy source (210) comprises two photovoltaic panels (124, 125) each comprising one end (176) cooperating with the guide means (174). ), and a free end (178) so as to be able to move each photovoltaic panel (124, 125) from a position along the sound production system (10, 410) in a vertical direction to a position over the box treble (16, 416) in a horizontal direction.

Claim 11. System (10, 410) according to any one of claims 3 to 10 for which the supply equipment zone (440) is arranged under the subwoofer (12, 412), the equipment zone. electronics (450) is arranged at the rear of the at least one enclosure (14, 414) of the subwoofer (12, 412).

Claim 12. System (10, 410) according to any one of claims 3 to 10 for which the supply equipment zone (440) and the electronic equipment zone (450) are grouped together within a single one. mobile unit (190).