System for communicating with an electronic device, adapter for such a system, and container for such an electronic device

Abstract

One aspect of the invention aims to enable an electronic device (2) packaged in a container (4) to communicate without compromising the transmitted data. In particular, the invention relates to a communication system (3) comprising: an authorised transmitter (31); and a receiver (32) connected to the device (2), wherein the transmitter and the receiver are configured for contactless communication, and wherein the receiver authorises communication to and from the electronic device only when an identifier (61) is detected in the data (510) received by the transmitter. Thus, the electronic device can only be interrogated by an authorised transmitter. An unauthorised transmitter (one that does not know the key) is unlikely to establish communication with the electronic device.

Description

DESCRIPTION TITLE: SYSTEM FOR COMMUNICATING WITH ELECTRONIC EQUIPMENT, ADAPTER FOR SUCH A SYSTEM, AND CONTAINER FOR SUCH ELECTRONIC EQUIPMENT TECHNICAL FIELD OF THE INVENTION

[0001] The technical field of the invention is that of communication with electronic equipment, for example to carry out a diagnosis of this equipment, even when said equipment is packaged, for example packed in a container. TECHNOLOGICAL BACKGROUND OF THE INVENTION

[0002] Carrying out communication with electronic equipment, for example as part of a diagnosis of this equipment, is generally based on the implementation of said equipment on an external interrogation means, also called a “test means” or “test bench”. Said test means generally comprises a power supply device for the electronic equipment and a communication terminal. Carrying out the diagnosis therefore requires: transporting the equipment from its storage location to a dedicated workshop; unpacking the equipment from its container or packaging; wiring the equipment to the power supply device and the test terminal.

[0003] These operations monopolize numerous hardware, software and human resources, are time-consuming, affect the availability of electronic equipment and impact their operation.

[0004] The document [“Application Note - Wireless power transfer solution for high performance including data transmission”, Würth Elektronik, https: / / www.we- online.com / en / support / knowledge / application-notes?d=anp070-proprietary-wireless-power-transfer-solution-for-high-performance-including-data-transmission, 22-10- 2018] discloses a system 1 , illustrated in figure 1 , making it possible to establish communication with electronic equipment 2. In particular, it makes it possible to power said contactless equipment 2 and to acquire data from the electronic equipment 2.

[0005] The disclosed system 1 comprises a primary circuit 11 called "transmitter" and a secondary circuit 12 called "receiver". The transmitter 11 comprises a square signal oscillator with a duty cycle of 50%, an LC type resonant circuit, notably comprising a coil 111. The receiver 12 also comprises an LC type resonant circuit, also comprising a coil 121. The excitation of the resonant circuit of the transmitter 11 makes it possible to generate a wave, called "carrier", by the coil 111, in this case a magnetic field oscillating at the fundamental frequency of the input square signal. The reception of a carrier by the coil 121 of the receiver 12 makes it possible to generate a high frequency signal in the receiver, which can be used to provide electrical energy (in this case after rectification of the signal).Thus, placing the coils 111, 121 of the two resonant circuits opposite each other makes it possible to couple, without contact, the transmitter 11 and the receiver 12 to power the electronic equipment 2 connected to the receiver 12.

[0006] The disclosed receiver 12 also comprises a means 122 for modulating the resonant frequency of the resonant circuit. Modulating this resonant frequency modulates a reflection of the carrier by the receiver 12 measurable at the transmitter 11. Modulating the resonant frequency of the receiver 12 thus provides a means for transmitting information from the receiver 12 to the transmitter 11. This reflection modulation can be seen as a second carrier emitted by the receiver 12, the variation in amplitude of which makes it possible to convey information from the receiver 12 to the transmitter 11 (called “amplitude-shift keying” or “ASK” in English).

[0007] The receiver 12, connected to the electronic equipment 2, can be connected and conditioned with this equipment 2. It thus makes it possible to power this equipment 2 without contact and transmit data, without the need to decondition the equipment 2.

[0008] The type of system illustrated in Figure 1 has a limitation in that it offers no security regarding the data communicated by the conditioned electronic equipment 2. A malicious person can therefore interrogate the equipment and obtain data (concerning for example the state of the equipment or its usage history). It is sufficient that this person is able to generate a carrier and measure its reflection on the receiver 12.

[0009] Furthermore, by using amplitude modulation, the system illustrated by Figure 1 remains less robust to coupling variations which significantly impact the amplitude of the signal during data communication by the electronic equipment 2. This system is also sensitive to electromagnetic amplitude noise.

[0010] There is therefore a need to improve the security regarding the data communicated by the packaged electronic equipment 2 as well as the integrity of the signal when data is communicated by the electronic equipment 2. SUMMARY OF THE INVENTION

[0011] The invention makes it possible to solve at least part of the aforementioned problems.

[0012] For this purpose, the invention relates to an adapter for ensuring contactless communication between an authorized transmitter and electronic equipment, comprising: a first resonant circuit, called "first upstream resonant circuit", configured to receive a first carrier emitted by the authorized transmitter and convert the first carrier into a first electrical signal; the adapter being remarkable in that it also comprises: a first switch connected to the first upstream resonant circuit and configured to transmit, when closed, the first electrical signal to the electronic equipment; a first demodulator, configured to demodulate the first electrical signal and obtain a digital data stream.

[0013] The adapter can be inserted into the communication channel between the transmitter and the equipment. The implementation of a first upstream resonant circuit makes it possible to achieve a contactless (also called "wireless") connection with the transmitter.

[0014] The adapter allows the transmission of the first electrical signal to the equipment only when the first switch is closed. It is therefore possible to block any communication between an unauthorized transmitter and the electronic equipment.

[0015] Advantageously, the adapter also comprises a first digital comparator comprising a first memory configured to store a first identifier, the first digital comparator being configured to: compare the digital data stream from the first demodulator with the first identifier; and close the first switch when the first identifier is detected in the digital data stream from the first demodulator.

[0016]

[0017] The adapter allows the transmission of the first electrical signal to the equipment only when the first identifier is detected in the data stream from the transmitter.

[0018] In other words, an authorized transmitter, i.e. one knowing the first identifier, can insert this first identifier into the data stream modulating the first carrier. From then on, the detection of this identifier by the adapter authorizes the transmission of the first signal to the electronic equipment.

[0019] On the other hand, an unauthorized transmitter, i.e. one that does not know the first identifier, cannot insert the correct identifier into the first data stream modulating the first carrier. Therefore, the transmission of the first signal to the electronic equipment remains interrupted, protecting the equipment from a malicious attack or unauthorized communication.

[0020] The first identifier is for example a first digital key or a first digital sequence, called the “first access sequence”.

[0021] Advantageously, the first switch is configured to transmit, when closed, a second electrical signal from the electronic equipment to the authorized transmitter.

[0022] The first switch only allows the second electrical signal to pass when it is closed, i.e. when the first identifier has been detected in the first electrical signal (i.e. when an authorized transmitter is interacting with the adapter). Thus, a communication from the electronic equipment will only be established with the use of an authorized transmitter. Even powering the electronic equipment by another means (for example a battery) does not allow the transfer of the second electrical signal to the transmitter to be forced.

[0023] Advantageously, the adapter comprises: a second switch, configured to transmit, when closed, a second electrical signal from the electronic equipment to the authorized transmitter; a second demodulator, configured to demodulate the second electrical signal and obtain a digital data stream; a second digital comparator comprising a second memory configured to store a second identifier, the second digital comparator being configured to: compare the digital data stream from the second demodulator with the second identifier; and close the second switch when the second identifier is detected in the digital data stream from the second demodulator.

[0024] A second switch, dedicated to the transmission of the second electrical signal, thus makes it possible to control the transmission of the second signal from the electronic equipment to the authorized transmitter. Transmission is only authorized if the electronic equipment is authorized, i.e. if it knows the second identifier. Thus, the adapter blocks the data to the transmitter in the event of an exchange of the authorized electronic equipment with another unauthorized electronic equipment (i.e. not knowing the second identifier).

[0025] The second identifier is for example a second digital key or a second digital sequence, called the “second access sequence”.

[0026] Advantageously, the first upstream resonant circuit is configured to modulate the first carrier from the second electrical signal.

[0027] Modulating the first carrier signal establishes a connection to the transmitter. The second signal can then be sent to the transmitter to communicate data from the electronic equipment.

[0028] Alternatively, the adapter includes a second upstream resonant circuit configured to convert the second electrical signal into a second carrier for delivery to the authorized transmitter.

[0029] The second carrier allows a connection to be established to the transmitter. The second signal can then be sent to the transmitter to communicate data from the electronic equipment.

[0030] Misalignment of the resonant circuits, and in particular of the sensitive elements of these circuits (for example, a coil or a piezoelectric element), can interrupt communication, in either direction, between the transmitter and the adapter. Using a single upstream resonant circuit makes it easier to maintain good alignment between the transmitter and the adapter.

[0031] However, using a single upstream resonant circuit to communicate with the transmitter restricts the choice of modulation for the first carrier. Indeed, the modulation used must be different from that used by the transmitter. When the first carrier is modulated by the transmitter using frequency-shift keying (FSK), it must be modulated differently by the adapter, for example by amplitude-shift keying (ASK). Using a second resonant circuit allows the modulation type of the second carrier to be chosen independently of the modulation type of the first carrier. This can be ASK or FSK modulation.

[0032] Advantageously, the adapter comprises a third resonant circuit, called the “first downstream resonant circuit”, configured to emit a third carrier to the electronic equipment, from the first electrical signal and when the first switch is closed.

[0033] The emission of a third carrier by the adapter allows the establishment of a contactless connection between the adapter and the electronic equipment.

[0034] Advantageously, the first downstream resonant circuit is also configured to convert a modulation of the third carrier carried out by the electronic equipment into a second electrical signal.

[0035] The conversion of the modulation of the third carrier allows the establishment of a wireless connection to transmit data from the electronic equipment to the transmitter.

[0036] Alternatively, the adapter comprises a fourth resonant circuit, called the second downstream resonant circuit, configured to receive a fourth carrier emitted by the electronic equipment and convert the fourth carrier into a second electrical signal.

[0037] Reception of the fourth carrier by the adapter allows the establishment of a wireless connection to transmit data from the electronic equipment to the transmitter.

[0038] Advantageously, the adapter is configured to be connected to the electronic equipment by means of a wired connection.

[0039] In this way, the first and second signals can be sent directly to the electronic equipment. This solution has the advantage of consuming less electrical energy than transmitting / receiving a carrier and converting it into an electrical signal.

[0040] Advantageously, the adapter comprises means configured to self-power from the first electrical signal. By "self-power" is meant that all or part of the adapter is powered. This is for example one or more functional blocks or the entire adapter.

[0041] Therefore, the elements of the adapter used to detect the first identifier and open the first switch are only supplied with electrical energy during reception of the first carrier. A break in the reception of the first carrier for a sufficient time stops powering the first demodulator and the first digital comparator and causes the first switch to open. Therefore, the first signal ceases to be transmitted to the electronic equipment. The second electrical signal, when it passes through, if applicable, also ceases to be transmitted to the transmitter.

[0042] For example, the first upstream resonant circuit includes an AC / DC voltage converter configured to generate a DC voltage from the first signal, the DC voltage powering the first demodulator and the first digital comparator.

[0043] Advantageously, the DC voltage also supplies the second demodulator and the second digital comparator.

[0044] A break in the reception of the first carrier for a sufficient time also stops powering the second demodulator and the second digital comparator. It therefore causes the second switch to open. From then on, the second electrical signal ceases to be transmitted to the transmitter.

[0045] Advantageously, the first upstream resonant circuit comprises a coil, sensitive to an oscillating magnetic field.

[0046] In this way, the adapter can be coupled, without contact, to a transmitter suitable for emitting such an oscillating field. The adapter can therefore be placed in a package transparent to an oscillating magnetic field and ensure communication between the transmitter and the electronic equipment.

[0047] Advantageously, the first upstream resonant circuit comprises a piezoelectric element, sensitive to an ultrasonic wave.

[0048] In this way, the adapter can be coupled through a solid wall to a transmitter suitable for emitting such a wave, even if this solid wall has electromagnetic shielding, for example opaque to an oscillating magnetic field.

[0049] The invention further relates to a system for contactless communication with electronic equipment comprising: an adapter according to the invention, for providing contactless communication between an authorized transmitter and the electronic equipment; and an authorized transmitter, comprising a resonant circuit, configured to convert the electronic signal into a first carrier intended for the adapter.

[0050] Communication can be established between the authorized transmitter and the electronic equipment using the system's adapter. The first carrier emitted by the transmitter can then be picked up by the adapter and converted into a first electrical signal.

[0051] Advantageously, the authorized transmitter further comprises a modulator configured to modulate, using an identifier, an electrical signal intended for the electronic equipment, said identifier being identical to the first identifier stored in the first memory of the adapter.

[0052] Since the carrier is emitted by an authorized transmitter, the first signal includes the first identifier. The adapter will therefore authorize (by closing the first switch) the sending of the first electrical signal to the electronic equipment. The electronic equipment, powered, will therefore be able to communicate data (for example, relating to a self-diagnosis).

[0053] The invention also relates to a container for electronic equipment comprising: an adapter according to the invention for ensuring contactless communication between an authorized transmitter and the electronic equipment; and a wall delimiting a volume inside the wall, said interior volume accommodating the adapter and being intended to accommodate the electronic equipment, a portion of the wall of the container, called a "window", adapted to allow the passage of a first carrier emitted by an authorized transmitter from outside the wall to the interior volume of the wall.

[0054] The container thus allows electronic equipment to be stored to protect it from shocks, electromagnetic waves and / or the surrounding air while also providing an adapter allowing communication to be established with an authorized transmitter only.

[0055] Advantageously, the wall includes, outside the window, electromagnetic shielding.

[0056] Electromagnetic shielding ensures, at least in part, the electromagnetic compatibility (known as "EMC") of electronic equipment with respect to electromagnetic waves that can propagate in the external volume.

[0057] Advantageously, the window comprises a dielectric material and the window has a thickness allowing the passage of a magnetic field. oscillating from the outer volume of the container to the inner volume of the container.

[0058] Dielectric materials are transparent to oscillating magnetic fields. They therefore enable inductive coupling between an authorized emitter and the adapter in the container. The window thus enables inductive coupling between the authorized emitter and the adapter in the container. For example, the first resonant circuit of the adapter may be sensitive to an oscillating magnetic field while a second resonant circuit of the adapter is sensitive to an ultrasonic wave.

[0059] Advantageously, the window comprises electromagnetic shielding and the window has a thickness allowing the passage of an ultrasonic wave from the exterior volume of the container to the interior volume of the container.

[0060] Thus, the electronic equipment is completely protected from electromagnetic waves. However, a first carrier, in the form of an ultrasonic wave, can still be transmitted to the first resonant circuit of the adapter. BRIEF DESCRIPTION OF THE FIGURES

[0061] The invention and its various applications will be better understood by reading the following description and examining the accompanying figures. The figures are presented for information purposes only and in no way limit the invention. Unless otherwise specified, the same element appearing in different figures has a single reference.

[0062] [Fig. 1], described above, presents a system for interrogating electronic equipment according to prior art.

[0063] [Fig. 2] shows a first embodiment of a communication system according to the invention as well as an embodiment of a container according to the invention.

[0064] [Fig. 3] shows a second embodiment of the communication system according to the invention. DETAILED DESCRIPTION

[0065] Figures 2 and 3 schematically present first and second embodiments of a system 3 for communication with electronic equipment 2, respectively. This communication system 3 aims to secure access to the electronic equipment 2, in particular when it is packaged in a container 4 that does not allow easy access to a power plug or a communication interface. The container 4 is, for example, sealed and / or shielded against electromagnetic waves. The system 3 thus ensures contactless communication with the equipment 2.

[0066] The system 3 according to the invention is also suitable for equipment 2 that must be powered by a carrier. A carrier is understood to mean a wave carrying energy. This may be, for example, an oscillating magnetic field, a so-called “radiofrequency” or “RF” electromagnetic field, or a sound or ultrasonic wave. The equipment 2 comprises, for example, a receiver as described in the technological background. The receiver makes it possible, for example, to convert a carrier into an electrical signal which, once rectified and smoothed, makes it possible to power components of the equipment 2.

[0067] Figure 2 shows the first embodiment of the communication system 3. It also shows a container 4 and electronic equipment 2.

[0068] The system 3 comprises: an authorized transmitter 31, intended to communicate with the equipment 2; and an adapter 32 intended to ensure communication between the authorized transmitter 31 and an electronic equipment 2.

[0069] The container 4 comprises a wall 40 delimiting an interior volume 41 (also called “interior”) from an exterior volume 42 (also simply called “exterior”). The interior volume 41 accommodates the adapter 32 of the communication system 3 and the electrical equipment 2. The authorized transmitter 31 is arranged outside the container 4.

[0070] The electronic equipment 2 is connected to the adapter 32, either by means of a wired connection or by means of a wireless connection (also called contactless). The connection between the adapter 32 and the equipment 2 is adapted for transfer a first electrical signal 51, coming from the transmitter 31, to the equipment 2. It can also be adapted to transfer data, coming from the equipment 2 (for example a self-diagnosis result) or to the equipment 2 (for example a command or a parameter for the self-diagnosis). It is preferably adapted to allow the transfer of electrical energy from the transmitter 31 to the equipment 2.

[0071] The authorized transmitter 31 and the adapter 32 can be connected to each other by means of a wireless connection. This wireless connection makes it possible in particular to transfer electrical energy and / or data. For this purpose, the wall 40 of the container 4 has at least one so-called “window” portion allowing a connection to be established between the transmitter 31 and the adapter 32.

[0072] The transmitter 31 is said to be “authorized” because it is recognized by the adapter 32 as being authorized to establish a transmission of data and / or electrical energy to the equipment 2.

[0073] The transmitter 31 is configured to transmit a first carrier to the adapter 32. For this, the transmitter 31 comprises a resonant circuit, configured to convert a first electrical signal 51 into the first carrier to the adapter 32. In the embodiment of FIG. 2, the resonant circuit of the transmitter 31 comprises an LC-type resonant circuit. It notably comprises an inductor, in particular a coil, in series with a capacitor. The coil thus makes it possible to transmit an oscillating magnetic field to the adapter 32.

[0074] The transmitter 31 also comprises a modulator configured to modulate the first electrical signal 51 using digital data 510, 61. Thus, the transmitter 31 can transmit digital data using the first carrier. The modulator can be configured to modulate the frequency, the amplitude and / or the phase of the first electrical signal 51. Preferably, the first electrical signal 51 is frequency modulated.

[0075] In this embodiment, the resonant circuit of the transmitter 31 can be configured to measure and convert a modulation of the first carrier by the adapter 32. The resonant circuit of the transmitter 31 then converts this modulation into a second electrical signal 52. The transmitter 31 comprises for example a demodulator configured to demodulate digital data 520 from the second electrical signal 52.

[0076] In the embodiment of Figure 2, the adapter 32 comprises a first resonant circuit 321, called “first upstream resonant circuit” and more particularly in this embodiment “upstream resonant circuit”. The upstream resonant circuit 321 is configured to: receive the first carrier, emitted by the transmitter 31; and convert it into a first electrical signal 51.

[0077] The upstream resonant circuit 321 is called "upstream" because it is arranged, for the adapter 32, upstream of a transmission from the transmitter 31 to the equipment 2. In other words, it is called "upstream" because it interacts with the authorized transmitter 31. The upstream resonant circuit 321 is, in this embodiment, of the LC type. It comprises an inductance, in this case a coil, and two capacitors in series with the coil. Thus the upstream resonant circuit 321 is sensitive to a carrier of the oscillating magnetic field type.

[0078] The resonant circuits of the transmitter 31 and the receiver 32, placed opposite each other, respectively allow the transmission and reception of the first carrier. Thus, a contactless connection can be established between the transmitter 31 and the adapter 32 so as to transmit the first signal 51 from the transmitter 31 to the adapter 32. In this embodiment, this transmission is carried out by transmission and reception of an oscillating magnetic field.

[0079] Alternatively, the connection between the resonant circuits of the transmitter 31 and the receiver 32 can be made by means of an ultrasonic wave. Said resonant circuits then each comprise a piezoelectric element. Thus they make it possible to carry out the emission and reception of an ultrasonic wave.

[0080] The adapter 32 also comprises a first functional block 323 for detecting an identifier 61 in the first electrical signal 51 so as to authenticate the transmitter 31 (it is then called “authorized transmitter” or “authenticated transmitter”). If the latter is authenticated, then the first electrical signal 51 can be transmitted to the electronic equipment 2. On the other hand, if the transmitter 31 is not authenticated, the first electrical signal 51 is not transmitted to the electronic equipment 2.

[0081] The first detection functional block 323 of FIG. 2 comprises: a first signal distributor 3234, which may also be called a “first signal separator” (called a “splitter” in English); a first switch 3232; a first demodulator 3233; and a first digital comparator 3231 comprising a first memory.

[0082] The first signal distributor 3234 is connected: to the upstream resonant circuit 321 on the one hand; and to the first switch 3232 and to the first demodulator 3233 on the other hand.

[0083] It is configured to duplicate the first signal 51 and distribute the latter between the demodulator 3233 and the first switch 3232. A low-cut filter can be inserted between the first resonant circuit 321 and the first signal distributor 3234 in order to retain only an alternating component of the first signal 51.

[0084] The first switch 3232 allows: when it is open, to block the transmission of the first signal 51 to the equipment 2; and when it is closed, to allow this transmission.

[0085] The switch 3232 is preferably monostable and in the absence of a command, in its open position. In this way, in the absence of a contrary instruction, the transmission of the first signal 51 to the equipment 2 is blocked.

[0086] The demodulator 3233 is configured to demodulate one of the signals from the first distributor 3234, which corresponds to the first signal 51. This demodulation makes it possible to obtain a digital data stream 510, also called a “digital sequence”. In this case, this is the data stream 510 used by the transmitter 31 to modulate the first signal 51.

[0087] The first digital comparator 3231 performs two tasks. First, it is configured to compare the data stream 510 from the first demodulator 3233 with a first identifier 61. Second, it closes the first switch 3232 when the first identifier 61 is detected in the data stream 510 coming from the first demodulator 3233.

[0088] The first identifier may be a first digital key or a first digital sequence, called a "first access sequence" or any other type of identifier that can be modulated with a carrier and demodulated from this carrier. In the remainder of the description, a first digital key will be considered as an example of the first identifier.

[0089] In this way, when the first digital key 61 is detected in the data 510, it causes the switch 3232 to close and therefore the first signal 51 to be transmitted to the electronic equipment 2.

[0090] The first comparator 3231 sends for example a closing command to the first switch 3232. It preferentially maintains this closing command for a predefined duration from the detection of the first key 61 in the data 510. Thus, unless the first key 61 is redetected in the data 510, the first switch will open at the end of the predefined time. The first comparator 3231 can also maintain the closing command as long as it is powered. Thus, when the power supply to the first detection functional block 323 is stopped, the first switch 3232 opens, cutting off the transmission of the first signal 51 to the equipment 2.

[0091] The first digital memory is configured to store the first digital key 61. The first memory is preferably a non-volatile memory, for example of the flash type. The storage of this first key 61 makes it possible to verify the authentication of the transmitter 31. Indeed, it is sufficient for the transmitter 31, when it is authorized, to insert the first key 61 into the data 510 transmitted to the adapter 32, to allow the transmission of the first signal 51 to the equipment 2. The transmitter 31 therefore preferably also comprises a memory in order to store a copy of the first digital key 61.

[0092] The adapter 32 of FIG. 2 also includes an AC / DC voltage converter 322 configured to generate a DC voltage from the first signal 51. The converter 322 includes, for example, a diode bridge 3221 and a capacitor. It may also include a voltage regulator 3222 configured to maintain a fixed voltage even in the event of a load variation.

[0093] The converter 322 is connected to the first detection functional block 323. It supplies in particular the first demodulator 3233 and the first digital comparator 3232. The conversion of the first carrier into the first electrical signal 51 which, once converted into a direct voltage, makes it possible to supply the first functional block 323 of the adapter 32. Thus, it is the reception of the first carrier by the adapter 32 which makes it possible to supply the first functional block 323 and keep it in operation.

[0094] Therefore, an interruption in the reception of the first carrier, resulting for example from the misalignment of the resonant circuits of the transmitter 31 and the adapter 32, or even from the transmitter 31 being torn off, stops the power supply to the first functional block 323 and cuts off the transmission of the first signal.

[0095] Thus, the authorized transmitter 31 cannot be removed and replaced with an unauthorized transmitter.

[0096] A misalignment of the resonant circuits of the transmitter 31 and the adapter 32 can induce a voltage drop which can also involve, when this voltage is lower than the supply voltage of the first detection functional block 323, an opening of the first switch 3232.

[0097] The converter 322 may include a capability to erase short outages.

[0098] The electronic equipment 2 can be configured to transmit a second electrical signal 52 to the transmitter 31. The second signal 52 is for example an alternating signal modulated in frequency, amplitude or phase, to convey information. This information is for example a result of a self-diagnosis carried out by the equipment 2.

[0099] In the embodiment of Figure 2, the first and second signals 51, 52 pass through the first switch 3232. The upstream resonant circuit 321 can be configured to modulate the first carrier, emitted by the transmitter 31, from the second signal 52. This mode of operation of the adapter 32 is called “half-duplex” because the same lines are used to transmit the first signal from the transmitter 31 to the equipment 2 and the second signal 52 from the equipment 2 to the transmitter 31. The data circulates sequentially in one direction and in another, but not simultaneously in both directions.

[0100] Thus, it is the detection of the first digital key 61 in the first signal 51 which makes it possible to establish a two-way connection with the equipment 2. Without the detection of the first key 61, the adapter 32 blocks communications in both directions.

[0101] Figure 3 schematically presents a second embodiment of the communication system 3. Only the communication system 3 is shown. Unlike the embodiment of Figure 2, allowing operation of the adapter 32 in “half duplex” mode, this embodiment allows operation in so-called “duplex” mode. That is to say that different lines are used to transmit, simultaneously, the first signal from the transmitter 31 to the equipment 2 and the second signal 52 from the equipment 2 to the transmitter 31.

[0102] For example, the adapter 32 of figure 3 comprises a second resonant circuit 326 called “second upstream resonant circuit”, configured to convert the second signal 52 coming from the electronic equipment 2 into a second carrier, intended for the transmitter 31. This second resonant circuit 326 is also called “upstream” because it interacts with the transmitter 31. The transmitter 31 comprises, by mirror effect, a second resonant circuit allowing it to receive the second carrier and thus obtain the second electrical signal 52.

[0103] The second upstream resonant circuit 326 may be of the same type as the first upstream resonant circuit 321. In this case, in the example of FIG. 3, the second upstream resonant circuit 326 is of the LC type. It may also be of a different type, making it possible to avoid interference between the first and second carriers. The second upstream resonant circuit 326 may, for example, comprise a piezoelectric element.

[0104] The duplex mode allows electrical signals 51, 52 to be used that are modulated in the same way without creating interference. They can both be modulated in FSK or ASK. However, in order to reduce the risk of interference between the first and second carriers, the first and second signals 51, 52 can be modulated using different methods. For example, the first signal 51 can be modulated by FSK while the second signal 52 can be modulated by ASK.

[0105] The first and second upstream resonant circuits 321, 326 may also have different resonant frequencies so that there is no cross-communications. Thus the same modulations, for example FSK or ASK, can be used simultaneously.

[0106] It is also possible to implement two half-duplex links in parallel with the first and second upstream circuits 321,326.

[0107] In the embodiment of Figure 2, the adapter 32 establishes a wireless connection with the electronic equipment 2. For this, the adapter 32 comprises a third resonant circuit 324 called “first downstream resonant circuit” or, in this embodiment “downstream resonant circuit”. It is called “downstream” because it is arranged, for the adapter 32, downstream of a transmission from the transmitter 31 to the equipment 2. It is also in direct interaction with the equipment 2. The downstream circuit 324 is configured to convert the first signal 51 into a third carrier intended for the equipment 2. The downstream resonant circuit 324 is also configured to measure and convert a modulation of the third carrier carried out by the equipment 2 into a second signal.

[0108] The use of a single downstream resonant circuit 324 to establish communication with the equipment 2 constrains the choice of modulations of the first and second electrical signals 51, 52. In order to avoid interference, the first and second signals 51, 52 are preferably modulated according to different methods. For example, the first signal 51 can be modulated by FSK while the second signal 52 can be modulated by ASK.

[0109] In the embodiment of Figure 3, the adapter 32 is connected to the electronic equipment 2 by means of two independent connections. A first wired connection allows the first signal 51 to be transmitted to the equipment 2. A second wired connection allows the second signal 52 to be transmitted to the adapter 32 (to then transmit it to the transmitter 31).

[0110] The two independent connections illustrated between the adapter 32 and the equipment 2 are wired. They could also be wireless. For example, the adapter 32 may comprise a third resonant circuit (as in the example of FIG. 3), called the “first downstream resonant circuit”, and a fourth resonant circuit, called the “second downstream resonant circuit”, respectively configured to convert the first signal 51 into a third carrier and convert a fourth carrier emitted by the equipment into a second signal 52 into a fourth carrier. The connection Wired connection may however be preferred as it requires less power consumption compared to a contactless connection.

[0111] The adapter 32 of FIG. 3 also comprises a second functional block 325 for detecting a second identifier 62 in the second electrical signal 52 so as to authenticate the electronic equipment 2. Thus, the adapter 32 can prevent the transmission of an equipment 2 which would not be authorized (i.e. which does not know the second digital key 62).

[0112] The second identifier may be a second digital key or a second digital sequence, called a "second access sequence" or any other type of identifier that can be modulated with a carrier and demodulated from this carrier. In the remainder of the description, a second digital key will be considered as an example of the second identifier.

[0113] The second detection functional block 326 operates in a similar manner to the first detection functional block 323. It therefore comprises: a second signal distributor 3254; a second switch 3252; a second demodulator 3253; and a second digital comparator 3251 comprising a second memory.

[0114] The second signal splitter 3254 is connected: to the electronic equipment 2 on the one hand; and to the second switch 3252 and to the second demodulator 3253 on the other hand.

[0115] It is configured to duplicate the second signal 52 and distribute the latter between the second demodulator 3253 and the second switch 3252. A low-cut filter can be inserted between the electronic equipment 2 and the second signal distributor 3254 in order to retain only an alternating component of the second signal 52.

[0116] The second switch 3252 allows you to: when closed, enable transmission of the second signal 52 from the equipment; and when open, cut off this transmission.

[0117] The second switch 3252 is, similarly to the first switch 3232, preferably monostable and in the absence of a command, in its open position. In this way, in the absence of a contrary instruction, the transmission of the second signal 52 to the transmitter 31 is cut off.

[0118] The second demodulator 3253 is configured to demodulate the second signal 52 (or at least a replica from the second distributor 3254). This demodulation makes it possible to obtain a digital data stream 520 originating from the equipment 2. This data stream 520 is for example a result of a self-diagnosis carried out by the equipment 2.

[0119] The second digital comparator 3251 is configured to compare the data stream 520 from the equipment 2 with a second digital key 62. The second digital comparator 3251 is also configured to close the second switch 3252 when the second digital key 62 is detected in the data stream 520 from the equipment 2.

[0120] In this way, the detection of the second digital key 62 in the data stream 520 authorizes the transmission of the second signal 52 from the electronic equipment 2 to the transmitter 31.

[0121] The second comparator 3251 sends a closing command to the second switch 3252 and preferentially maintains this closing command for a predefined duration from the detection of the second key 62. The second comparator 3251 can also maintain this closing command as long as it is powered. Thus, when the power supply to the second detection functional block 325 is stopped, the second switch 3252 opens, cutting off the transmission of the second signal 52 to the transmitter 2.

[0122] The second digital memory is configured to store the second digital key 62. It is preferably non-volatile, for example of the flash type.

[0123] According to a development, the first and second digital keys 61, 62 are identical.

[0124] The AC / DC voltage converter 322 is configured to generate a DC voltage from the first signal 51. In FIG. 3, the converter 322 is connected to the second detection functional block 325. It thus powers the second demodulator 3253 and the second digital comparator 3252. The reception of the first carrier thus makes it possible to power the first and second functional blocks 323, 325 of the adapter 32. Therefore, an interruption in the reception of the first carrier stops the power supply of the first and second functional blocks 323, 325 and cuts off the transmission of the first and second signals 51, 52.

[0125] Figure 2 illustrates a container 4 comprising a wall 40, delimiting the interior volume 41 from the exterior volume 42. The wall 40 comprises at least one portion, called a “window”, adapted to allow a wireless connection between the transmitter 31 and the adapter 32. For example, when the transmitter 31 is arranged outside 42 of the container 4 and the adapter 32 is arranged inside 41 of the container 4, the window allows the passage of the first carrier emitted by the transmitter 31 to the interior volume 41 of the container 4.

[0126] The window may comprise a dielectric material. For example, it is made of a dielectric material in the form of a single layer (such as a plastic wall) or in the form of a multilayer (such as a superposition of plastic layers). For example, it is made of a plastic material.

[0127] The wall 40 is preferably continuous at the window. It thus provides a physical barrier to the intrusion of an object and / or a fluid. Thus, the wall 40 can provide sealed protection around the interior volume. In other words, the window is not expected to be a simple opening made in the wall. In other words, the air, which is a dielectric material, is not considered a portion of the wall, nor even a window.

[0128] A window made of dielectric material allows an oscillating magnetic field to pass through. The first and / or second carriers implemented by the transmitter 31 and the adapter 32 can therefore be an oscillating magnetic field.

[0129] The level of coupling between the resonant circuits of the transmitter 31 and the adapter 32 depends strongly on the distance between the two coils used by these resonant circuits. It is therefore advisable that the thickness of the window is as as low as possible, for example a few millimeters, in order to guarantee a sufficient level of coupling.

[0130] In order to protect the electronic equipment 2 and / or the adapter 32 from external magnetic waves, the container 4 may be shielded. For example, the wall 40 of the container may comprise electromagnetic shielding. The wall 40 comprises, for example, a layer of material having high magnetic permeability, such as a soft permalloy.

[0131] The window allowing the transfer of an oscillating magnetic field can, however, be an exception by providing an unshielded portion and a dielectric material instead of shielding.

[0132] According to an alternative embodiment, the window may comprise a material allowing the propagation of a sound or ultrasonic wave. The first and / or second carriers implemented by the transmitter 31 and the adapter 32 may therefore be an ultrasonic wave.

[0133] The window is made, for example, of a solid plastic or a conductive material. A conductive material offering electromagnetic shielding properties can be chosen. This allows for a fully shielded container 4.

[0134] The coupling level between the resonant circuits of the transmitter 31 and the adapter 32 also depends strongly on the distance between the two piezoelectric elements by the resonant circuits. It is therefore advisable that the thickness of the window, for example a few millimeters, is as small as possible in order to guarantee a sufficient coupling level.

[0135] The wall 40 may comprise a plurality of windows, for example two windows. The plurality of windows allows for multiple wireless communications between the transmitter 31 and the adapter 32, thus providing the possibility of using duplex operation of the adapter 32.

Claims

CLAIMS

1. Adapter (32) for providing contactless communication between an authorized transmitter (31) and electronic equipment (2), comprising: - a first resonant circuit (321), called “first upstream resonant circuit”, configured to receive a first carrier emitted by the authorized transmitter (31) and convert the first carrier into a first electrical signal (51); the adapter (32) being characterized in that it also comprises: - a first switch (3232), connected to the first upstream resonant circuit (321) and configured to transmit, when closed, the first electrical signal (51) to the electronic equipment (2); - a first demodulator (3233), configured to demodulate the first electrical signal (51) and obtain a digital data stream (510).

2. The adapter (32) of claim 1, further comprising a first digital comparator (3231) comprising a first memory configured to store a first identifier (61), the first digital comparator (3231) being configured to: - comparing the digital data stream (510) coming from the first demodulator (3233) with the first identifier (61); - and closing the first switch (3232) when the first identifier (61) is detected in the digital data stream (510) coming from the first demodulator (3233)

3. Adapter (32) according to one of claims 1 to 2, comprising means configured to self-power from the first electrical signal.

4. Adapter (32) according to one of claims 1 to 3, in which the first switch (3232) is configured to transmit, when closed, a second electrical signal (52) coming from the electronic equipment and intended for the authorized transmitter.

5. Adapter (32) according to one of claims 1 to 3, comprising: - a second switch (3252), configured to transmit, when closed, a second signal (52) coming from the electronic equipment and intended for the authorized transmitter; - a second demodulator (3253), configured to demodulate the second signal (52) and obtain a digital data stream (520); - a second digital comparator (3251) comprising a second memory configured to store a second identifier (62), the second digital comparator (3251) being configured to: - compare the digital data stream (520) coming from the second demodulator (3233), with the second identifier (62); and - closing the second switch (3252) when the second identifier (62) is detected in the digital data stream (52) coming from the second demodulator (3253).

6. Adapter (32) according to one of claims 4 or 5, in which the first upstream resonant circuit (321) is configured to modulate the first carrier (51) from the second signal (52).

7. Adapter (32) according to one of claims 4 or 5, comprising a second upstream resonant circuit (326) configured to convert the second signal (52) into a second carrier intended for the authorized transmitter (31).

8. Adapter (32) according to one of claims 1 to 7, the first upstream resonant circuit (321) comprises a coil, sensitive to an oscillating magnetic field.

9. Adapter (32) according to one of claims 1 to 7, the first upstream resonant circuit (321) comprises a piezoelectric element, sensitive to an ultrasonic wave.

10. System (3) for contactless communication with electronic equipment (2) comprising: an adapter (32) according to one of the preceding claims, for ensuring contactless communication between an authorized transmitter (31) and electronic equipment (2); and an authorized transmitter (31), comprising: a resonant circuit, configured to convert the electronic signal into a first carrier intended for the adapter (32).

11. System (3) according to the preceding claim, in which the adapter (32) is an adapter according to claim 2; and in which the authorized transmitter (31) comprises a modulator configured to modulate an electrical signal intended for the electronic equipment (2) with an identifier, said identifier being identical to the first identifier stored in the first memory of the adapter (32).

12. Container (4) for electronic equipment (2) comprising: - an adapter (32), according to one of claims 1 to 9, for ensuring contactless communication between an authorized transmitter (31) and the electronic equipment (2); and - a wall (40), delimiting an interior volume (41) to the wall, said interior volume (41) accommodating the adapter (32) and being intended to accommodate the electronic equipment (2), a portion of the wall (40), called a “window”, being adapted to authorize the passage of a first carrier emitted by an authorized transmitter from the exterior of the wall to the interior volume (41) of the wall (41).

13. Container (4) according to claim 12, in which the wall comprises, outside the window, electromagnetic shielding.

14. Container (4) according to one of claims 12 or 13, wherein the window comprises a dielectric material and wherein the window has a thickness allowing the passage of an oscillating magnetic field from the exterior volume (42) of the container (4) to the interior volume (41) of the container (4).

15. Container (4) according to one of claims 12 or 13, and in which the window comprises electromagnetic shielding and in which the window has a thickness allowing the passage of an ultrasonic wave from the exterior volume (42) of the container (4) to the interior volume (41) of the container (4).

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