METHOD FOR CONFIGURING THE DETECTION DEVICE OF THE STATE OF AN OPENING, AND CORRESPONDING DETECTION DEVICE

Description

[0001] The present invention relates to methods and devices for transmitting a radio message by a device for detecting the state of an opening, particularly in a building.

[0002] In the field of home automation, there are alarm systems, such as home alarms, to monitor the condition of a window, or a shutter, or a door, or more generally an opening in a building.

[0003] In these systems, a detection device is associated with a moving part of the opening to determine whether the moving part is in one of at least two positions: open or closed. The measured information is transmitted to a programmed control unit to trigger an alarm if the opening is identified as being in an abnormal or non-compliant position.

[0004] For a long time, wired connections were used to link detection devices to the control unit. Today, it is desirable to be able to use detection devices capable of communicating wirelessly with remote equipment, for example via a radio frequency link.

[0005] However, the use of a wireless link must meet sometimes contradictory requirements, particularly with regard to adjusting the transmission power of radio messages.

[0006] Without a wired connection, detection devices can no longer be powered by an external energy source. They require an onboard power source, such as a battery, which is often not rechargeable by the user. Therefore, the transmission power must be chosen so that sending radio messages, which is an energy-intensive operation, does not prematurely deplete this power reserve.

[0007] It is important, however, that the radio link be of good quality and that the transmitted messages have a chance of reaching their destination. However, the materials used to make the opening sometimes have poor transmission properties and can therefore hinder the propagation of transmitted radio messages, as sometimes happens with metal or partially metal window frames.

[0008] An example of the prior art is provided in document EP 3 383 058.

[0009] Furthermore, such devices are often intended for domestic use and must therefore comply with regulations that limit the electrical power radiated when sending radio frequency messages.

[0010] Therefore, there is a need for processes and devices for the transmission of a radio frequency message that address the aforementioned drawbacks, particularly to optimize the transmission power of radio frequency messages.

[0011] For this purpose, the invention relates to a method according to claim 1.

[0012] Identifying the position of the moving part allows us to characterize the immediate environment of the radio antenna. Indeed, in both the open and closed positions, the radio antenna is connected to the moving part. Furthermore, in the closed position, the antenna is at least partially surrounded by or adjacent to the fixed part, which can degrade transmission quality.

[0013] The transmission power is therefore optimized by seeking a compromise between, on the one hand, the need to have good quality transmission and, on the other hand, the need not to consume too much energy or to emit continuously with a transmission power exceeding regulatory limits, while adapting as best as possible to the installation.

[0014] Depending on advantageous but not mandatory aspects, such a process may incorporate one or more of the following characteristics, taken individually or in any technically permissible combination: The data acquisition step representing a characteristic of the material forming the opening and / or a dimensional characteristic of the opening comprises the following steps: once the moving part is in a closed position, send an electrical signal to the radio antenna via the transceiver circuit to emit a predefined radio frequency signal; measure the electrical power reflected by the antenna back to the transceiver circuit; calculate a quantity representative of the antenna's reflective properties from the measured value; and determine a maximum transmission power threshold value for the closed position based on the calculated quantity. The representative quantity is a standing wave ratio calculated from an antenna reflection coefficient.The data acquisition step representing a dimensional characteristic of the opening and / or a characteristic of the material forming the opening includes steps consisting of: automatically retrieving data provided by a user during installation, such as the type of material used and / or the thickness of the material surrounding the antenna when it is in the open and closed positions and / or the distance between the antenna and the moving part of the opening in the closed position. The method includes, for at least one position determined from an open position of the moving part and a closed position of the moving part, a step of determining a minimum threshold value and a maximum threshold value. A threshold value determined based on the acquired data is a minimum power threshold value for the closed position of the moving part.The maximum emission power threshold value determined for the open position of the moving part is lower than the maximum emission power threshold value determined for the closed position of the moving part, and the minimum emission power threshold value determined for the open position of the moving part is higher than the minimum emission power threshold value determined for the closed position of the moving part.

[0015] In another aspect, the invention relates to a communication method implemented by a device for detecting the state of an opening, particularly in a building. The detection device comprises a set of sensors for detecting the position of a moving part of the opening, a central processor, computer memory, and a transceiver circuit coupled to a radio antenna. The device is pre-configured by applying a configuration method as described above. According to the invention, this communication method comprises steps consisting of: with the detection device installed in the moving part of the opening, identify a position of the moving part relative to a fixed part of the opening from among at least one open position and one closed position; automatically select, by the detection device, a transmission power threshold value associated with the identified position, determined during the configuration process; transmit a radio message, by means of the transmitter-receiver circuit and the radio antenna, with a radio transmission power substantially equal to the transmission power threshold value selected for the position identified by the detection device.

[0016] Such a communication method may also incorporate one or more of the following features, taken individually or in any technically permissible combination: The device automatically detects a change in the position of the moving part relative to the fixed part and identifies the new position of the moving part relative to the fixed part before transmitting a radio message. At least one sensor of the detection device is coupled with a closing mechanism of the opening, and in which the position identification is performed by said at least one sensor.

[0017] According to another aspect, the invention relates to a detection device according to claim 11.

[0018] According to yet another aspect, the invention relates to an opening, such as a window or a shutter or a door, comprising a fixed part and a movable part that can be moved relative to the fixed part between at least one open position and one closed position, the movable part comprising a detection device as described above.

[0019] The invention will be better understood and other advantages thereof will become more apparent in the light of the following description of an embodiment of methods and devices for transmitting a radio frequency message, given solely by way of example and with reference to the accompanying drawings, in which: [ Fig 1 ] there figure 1 is a schematic representation of an opening, such as a window, comprising a detection device according to embodiments of the invention; [ Fig 2 ] there figure 2 is a block diagram of a detection device according to embodiments of the invention; [ Fig 3 ] there figure 3 is a schematic representation of a detection device according to an embodiment of the invention; [ Fig 4 ] there figure 4 is a flow diagram representing an example of a process for transmitting a radio message by the detection device of the figure 2 ; Fig 5 ] there figure 5 is a flow diagram representing an example of a process for defining a radio emission power threshold value by the detection device figure 2 according to a first embodiment; [ Fig 6 ] there figure 6 is a flow diagram representing an example of a process for defining a radio emission power threshold value by the detection device figure 2 according to a second embodiment.

[0020] There figure 1 represents an opening 2 configured to open or close an opening formed in a wall, in a partition, or in a wall of a building.

[0021] The opening 2 comprises a movable part 4 and a fixed part 6.

[0022] For example, the fixed part 6 is attached to the wall.

[0023] The movable part 4 is movable relative to the fixed part 6, for example with a pivoting, sliding or tilting movement.

[0024] For this purpose, the moving part 4 can be mechanically coupled to the fixed part 6, for example by means of one or more hinges, or a guide rail, or a tilt-and-turn mechanism, or any other suitable mechanism.

[0025] The movable part 4 is thus reversibly displaceable between a closed position and an open position. In the closed position, the movable part 4 is in contact with the fixed part 6 so as to close, or even lock, the opening.

[0026] Depending on the nature of the mechanical coupling, other positions can be considered, including intermediate positions, such as a partially open or half-open position.

[0027] In the illustrated example, the opening 2 is a wall window. The frame of window 2 forms the fixed part 6. The sash of window 2, together with the pane(s) of glass supported by the sash, together form the movable part 4 of the window.

[0028] Depending on the construction variants, window 2 may have several movable parts, as in the case of a window which has several sashes.

[0029] It is understood that this example of a window is given for illustrative purposes only and is not necessarily limiting to the invention. In many other embodiments, which are not illustrated in detail, the opening 2 can be a door, a shutter, a gate, a metal curtain, or any other equivalent structure.

[0030] In practice, the moving part 4 and the fixed part 6 can be made of wood, or metal, or a metal alloy, or polymer, for example PVC (Polyvinyl chloride).

[0031] The moving part 4 of the opening 2 includes a control element 8, for example manual such as a handle or a lever, and a closing mechanism 10, also called fitting, coupled to the control element 8. Alternatively or in addition, the control element 8 can be motorized, that is to say it includes an electric motor allowing the fitting to be moved in a motorized manner.

[0032] In Figure 1, the locking mechanism 10 is schematically simplified and, in practice, may take a different form from that illustrated. For example, the locking mechanism 10 includes one or more metal rods extending along the frame of the moving part 4, for example along an edge of the frame.

[0033] According to examples, the closing mechanism 10 includes at least one movable locking pin projecting from the moving part 4. The locking pin takes several positions depending on the actuation of the control member 8. For example, it is configured to be engaged in a receiving housing formed in the fixed part 6, in order to lock the moving part 4 in the closed position on the fixed part 6.

[0034] The opening 2 also includes a detection device 12 configured to identify the position of the moving part 4 relative to the fixed part 6, examples of which are illustrated on the figures 2 And 3 .

[0035] The detection device 12 is further configured to transmit, to a remote receiving station 14, a radio message containing information representative of the identified position.

[0036] For example, the detection device 12 is part of a home automation system, such as a home alarm system. The remote receiving station 14 can be a radio receiver connected to a central computer of the alarm system.

[0037] In other embodiments, remote station 14 can also transmit radio messages. For example, remote station 14 is a gateway providing access to a computer network, such as a gateway for a home automation network to an IP (Internet Protocol) network.

[0038] The detection device 12 is associated with the moving part 4, for example installed or embedded in the moving part 4 or fixed on the moving part 4. Preferably, the detection device 12 is installed so as not to hinder the closing movement of the moving part 4. For example, it is housed in a cavity in the moving part 4 or in a cavity formed by the moving part and the fixed part.

[0039] As illustrated on the figure 3 , the detection device 12 includes a housing 16, for example made of a rigid material, for example plastic, such as thermoset polymer.

[0040] Fastening equipment 18 is associated with the housing 16. In the illustrated example, the fastening equipment 18 is screw holes, cooperating with self-drilling screws screwed into the chassis of the moving part.

[0041] According to embodiments illustrated on the figure 2 , the detection device 12 includes a set of sensors 20 to measure the position of the moving part 4, a processor 22, a computer memory 24 and a transceiver circuit 26 coupled to a radio antenna 28 configured to establish a radio communication link with the remote receiving station 14.

[0042] Preferably, the sensors 20 are housed inside the casing 16, which makes it possible to obtain a relatively compact and easy-to-install detection device 12.

[0043] According to examples, at least one sensor 20 is coupled with the closing mechanism 10, for example by means of a measuring system, as will be described by way of example below. On the figure 3 , only one of the sensors 20 is identified by the reference “20”.

[0044] For example, the processor 22 is a microprocessor or microcontroller programmed to execute executable instructions stored on a computer-readable medium, such as memory 24, in order to implement one or more of the processes described below.

[0045] According to examples, memory 24 is ROM memory, or RAM memory, or non-volatile memory (for example, according to one of the following technologies: EPROM, EEPROM, FLASH, NVRAM), or equivalent.

[0046] The processor 22 and the memory 24 together form an electronic control unit for the detection device 12.

[0047] Alternatively, the detection device 12 includes a field-programmable gate array, an application-specific integrated circuit, or an electrical circuit comprising a set of discrete electronic components.

[0048] The transceiver circuit 26 and the radio antenna 28 are, for example, compatible with one or more wireless communication protocols and standards, such as a short-range radio link, for example of the Bluetooth ®< or Zigbee ®< type or equivalent, or a wireless internet network.

[0049] The radio antenna 28 is embedded in the movable part 4. For example, the antenna 28 can be arranged inside the housing 16 or outside the housing 16 while remaining in the movable part 4 or on an outer face or edge of the movable part 4.

[0050] It is understood that, when the movable part 4 is in the closed position, the antenna 28 is confined within a cavity or gap formed by the fixed and movable parts, the cavity being closed by the fixed part 6. In particular, the fixed part can then be attached to the housing of the detection device, and thus to the radio antenna. Conversely, in the open or even partially open position, the antenna 28 is not completely confined within the gap or cavity. The distance between the antenna and the fixed part in the closed position is greater than the distance between the antenna and the fixed part in the open position. Thus, the transmission quality is better in the open position than in the closed position, especially if the fixed part 6 is made of metallic material. Indeed, the presence of a large metallic mass near the radio antenna can significantly affect the quality of the radio signal transmission.

[0051] Advantageously, the power supply for the detection device 12 is provided by an energy reserve 30 embedded in the housing 16, such as an electrochemical battery or one or more batteries.

[0052] According to optional but nevertheless advantageous embodiments, the detection device 12 includes a measurement circuit 32 connected to the antenna 28 and / or to the transmitter-receiver circuit 26 in order to measure the electrical power reflected by the antenna 28 when it is powered by the transmitter-receiver circuit 26 when sending a message.

[0053] In some variants, the measurement circuit 32 is integrated into and / or implemented by the transmitter-receiver circuit 26.

[0054] For example, the measurement circuit 32 includes an analog-to-digital converter connected to an input of the processor 22.

[0055] Optionally, the detection device 12 may include one or more additional sensors 34, such as accelerometers, configured to measure a displacement or orientation of the moving part.

[0056] In practice, the electronic components of the detection device 12 can be mounted on a printed circuit board 36 installed inside the housing 16.

[0057] According to embodiments given by way of example, the coupling between the sensor(s) 20 and the closing mechanism 10 is achieved by means of a rod 40 of the detection device 12 mounted sliding relative to the housing 16.

[0058] An external end of the rod 40 cooperates with the closing mechanism 10 in order to be moved in translation when the locking pin changes position, for example following an action by a user on the control member 8 and / or following a movement of the movable part 4 of the opening 2. An internal end of the rod supports a permanent magnet 42. Thus, the magnet 42 moves with the rod 40.

[0059] In this example, the sensors 20 are magnetic sensors, such as Hall effect sensors, which are mounted on the printed circuit board 36 parallel to the axis of movement of the rod 40. When the rod 40 moves with the closing mechanism 10, the magnet 42 thus takes several positions facing the sensors 20.

[0060] The position of the magnet 42 is therefore measured by means of the action of one or more sensors 20 and the processor 22. In this way, the position of the moving part 4 can be determined indirectly.

[0061] For example, the moving part 4 is considered to be in the closed and locked position when the locking pin is received inside a receiving housing in the fixed part 6. The rod 40 then occupies a certain position which it would not otherwise have if the locking pin and the moving part 4 were in a position other than the closed position.

[0062] This example, given for the purposes of illustration and explanation, is not limiting of the invention and it is understood that other implementation methods can be used to measure the position of the moving part 4.

[0063] For example, the sensors 20 can be switches coupled directly or indirectly with the closing mechanism 10.

[0064] The position of the moving part 4 could also, in another variant, be measured indirectly by sensors 20 without having to use coupling with the closing mechanism 10.

[0065] Alternatively, when the detection device 12 includes one or more additional sensors 40, through which, for example, the position of the moving part 4 can be refined, thanks to the displacement and / or orientation measurements provided by the additional sensors 40.

[0066] As explained previously, the detection device 12 is programmed to send one or more radio messages to the remote receiver 14, for example in the form of one or more coded frames.

[0067] For example, the messages may contain information representative of the position of the mobile part 4.

[0068] Thus, when the detection device 12 is used within a home automation system, such as a home alarm system, the messages serve to indicate whether the opening 2 is open or closed. In this way, an appropriate action can be automatically taken by the home automation system, for example, to trigger an alarm if the opening 2 is open when it should not be.

[0069] The processor 22 is thus programmed to generate at least one message and to control the transmit-receive circuit 26 in order to send the message thus generated.

[0070] According to one aspect of the invention, the processor 22 is programmed to define message sending parameters before sending a message, in particular to define the radio transmission power with which the transmit-receive circuit 26 will send the message. Advantageously, the transmission power is chosen according to the position—open or closed—of the gate 2.

[0071] An example of the operation of the detection device 12 is now described with reference to the figure 4 .

[0072] The process starts at step 50.

[0073] For example, the process starts following a movement of the movable part 4 opening it 2. According to examples, the movement is detected by the sensors 20 and / or by at least one additional sensor 40.

[0074] For example, such a movement is caused by an action by a user on the moving part 4, whether it is a legitimate action or an attempted break-in.

[0075] In step 52, the detection device 12 automatically identifies the position occupied by the moving part 4, specifically to determine whether the moving part 4 is in the closed and locked position, the open position, or some other position. For example, the position is identified using one or more of the sensors 20. The identified position can then be stored in the memory 24.

[0076] During a step 54, the detection device 12 automatically selects, for example using the processor 20, a threshold value for emission power according to the identified position.

[0077] According to some embodiments, the emission power threshold value is selected from a plurality of predefined threshold values, each associated with a position of the moving part.

[0078] For example, a first predefined value associated with the open position and a second predefined value associated with the closed position are stored in memory 24. The emission power threshold value is chosen to be equal to the first value if the opening 2 is identified as being in the open position, and equal to the second value if the opening 2 is identified as being in the closed position.

[0079] Alternatively, it is possible to define additional predefined values ​​associated with other positions of the opening. These additional predefined values ​​can also be stored in memory, and one of them can be selected if opening 2 is identified as being in the corresponding position.

[0080] According to embodiments, a minimum emission power threshold value and a maximum power threshold value are determined for at least one position among the open position of the moving part and the closed position of the moving part.

[0081] In some embodiments, the first maximum emission power threshold value for the open position is lower than the second maximum emission power threshold value for the closed position. Similarly, the first minimum emission power threshold value for the open position is higher than the second minimum emission power threshold value for the closed position.

[0082] In practice, a threshold value determined based on the acquired data is a minimum power threshold value for the closed position of the moving part. Other threshold values ​​can then be determined relative to this minimum power threshold value, notably through calculation.

[0083] Finally, during a step 56, the radio message is emitted by the radio antenna 28 and by the circuit 26, with a radio transmission power substantially equal to the transmission power threshold value selected for the position identified by the detection device.

[0084] For example, by "approximately equal" we mean here that the radio transmission power is equal to within 5% or within 10% of the selected transmission power threshold value.

[0085] In practice, when a minimum transmission power threshold value and a maximum transmission power threshold value are determined for the open position of the moving part and / or the closed position of the moving part, the radio message is transmitted by the radio antenna 28 and by the circuit 26, with a radio transmission power lower than the maximum transmission power threshold value and higher than the minimum transmission power threshold value. Determining these two thresholds using the method according to the invention amounts to limiting the range of transmission powers usable by the detection device.

[0086] Thanks to many aspects of the invention, identifying the position of the moving part makes it possible to know what the immediate environment of the radio antenna 28 is. Indeed, in the closed position of the opening 2, the antenna is at least partially surrounded by the fixed part 6 or attached to the fixed part 6, which is likely to degrade the quality of the transmission more than in the open position, especially if the fixed part 6 is made of metallic material.

[0087] Since the transmission quality is better in the open position than in the closed position of opening 2, the emission power threshold value is lower when opening 2 is open than when opening 2 is closed.

[0088] The emission power, approximately equal to the power threshold value, is therefore optimized according to the position of the opening 2 by seeking a compromise between, on the one hand, the need to have good quality transmission and, on the other hand, the need not to consume too much energy or to emit continuously with an emission power exceeding regulatory limits.

[0089] According to some embodiments, the predefined values ​​are default values ​​pre-recorded in factory memory during the manufacture of the detection device 12 or during the manufacture of the opening 2. These predefined values ​​are values ​​adapted to meet the requirements of the standards in this field.

[0090] According to other more advantageous variants, the predefined values ​​can be defined during the installation of the opening or the detection device 12, which makes it possible to take more precise account of the immediate environment of the antenna 28 in the mobile part 4 and to take it into account in the definition of the transmission power threshold values.

[0091] According to a first possibility, an example of which is described with reference to the figure 5 at least part of the predefined values ​​is determined from data provided by a user during installation, including characteristics relating to dimensions and / or properties of the materials used to form the opening 2, and more particularly used to form the fixed part 4 and / or the moving part 6. This makes it possible to determine the transmission power threshold values ​​based on the characteristics of the immediate environment of the antenna 28.

[0092] For example, the data may relate to the type of material used: wood, metal, polymer, etc. The data may also relate to the dimensions of the moving part 4 or the fixed part 6, such as the thickness of material surrounding the antenna when it is in the open and closed positions and / or the distance between the antenna and the moving part of the opening in the closed position.

[0093] The process starts at step 60, for example following a calibration request issued by a user.

[0094] The calibration request can be issued by pressing a push button on the detection device 12 or by sending a specific message to the detection device 12 via the radio link.

[0095] During a step 62 and / or a step 64, the control circuit of the detection device 12 receives said data supplied by the user.

[0096] For example, step 62 corresponds to the receipt of data relating to the nature of the material and step 64 corresponds to the receipt of data relating to dimension or thickness.

[0097] The data can be transmitted by the user via a communication link established with the electronic circuit of the detection device 12, such as a radio link established with the circuit 26. To select and transmit the data, the user can be equipped with an electronic terminal, or can use a computer connected to the detection device 12. The data can be selected by the user from a predefined list of data, such as a list of materials or a list of dimensions.

[0098] During a step 66, the control circuit automatically determines a first emission power threshold value for an open position of the moving part 4 and a second emission power threshold value for a closed position of the moving part 4 based on the acquired data.

[0099] Advantageously, the control circuit determines a first maximum power threshold value and a first minimum power threshold value for an open position of the moving part 4 and a second maximum power threshold value and a second minimum power threshold value for a closed position of the moving part 4, at least one of these values ​​being determined according to the acquired data.

[0100] For example, a predefined lookup table is stored in memory 24. In this table, emission power threshold values ​​are pre-recorded and associated with different dimensional characteristics and / or material characteristics.

[0101] For example, for each type of material, threshold values ​​are defined for the open and closed positions. Similarly, different threshold values ​​can be defined for different sizing values. In practice, for each position, the emission power threshold value associated with a metallic material is higher than the emission power threshold values ​​associated with a non-metallic material, such as wood or a polymer.

[0102] Thus, in step 66, the values ​​are chosen by selecting from the lookup table the values ​​that correspond to the data selected by the user.

[0103] Finally, during step 68, the determined power values ​​are recorded in memory 24.

[0104] At this stage, the detection device 12 has a threshold value for each predefined position. Subsequently, when steps 50 and following of the position identification process are implemented, the threshold value selected in step 54 is chosen from among these values ​​stored in memory.

[0105] According to a second possibility, an example of which is described with reference to the figure 6 at least part of the predefined values ​​is determined automatically by measuring reflection properties of an electrical signal sent to the antenna, preferably during the installation of the detection device 12.

[0106] For example, the process begins at step 70, preferably once the moving part 4 is in the closed position.

[0107] Optionally, during step 72, the detection device 12 identifies the position of the moving part 4 as described previously to verify that the moving part 4 is indeed in the closed position. If the moving part 4 is not in the closed position, the process is interrupted (step 74). Otherwise, the process proceeds normally.

[0108] In step 76, an electrical signal is sent to the radio antenna 28 by the transmitter-receiver circuit 26 to emit a predefined radio frequency signal.

[0109] For example, a continuous radio signal, such as a pure carrier wave or a modulated carrier, is sent by antenna 28, for example for a duration of at most a few seconds.

[0110] In a step 78, the electrical power reflected by the antenna 28 to the transmitter-receiver circuit 26 is measured, for example using the measurement circuit 32 previously described.

[0111] During a step 80, a quantity representative of the antenna's reflection properties is automatically calculated, for example by the processor 22, from the measured value of electrical power reflected by the antenna 28.

[0112] During a step 82, a minimum emission power threshold value for the closed position is automatically determined, for example by the processor 22, based on the calculated reflection properties.

[0113] For example, if no reflected power is measured, or if the reflected power is low, less than 10% of the electrical power, preferably less than 5%, this means that virtually all the electrical power supplied to antenna 28 is radiated. It is then very likely that the antenna is surrounded by non-metallic areas.

[0114] On the contrary, if a significant portion of the electrical power supplied to antenna 28 is reflected, for example at least 20% or 30%, this means that it is likely that antenna 28 is at least partially surrounded by metallic areas which impair the quality of the transmission.

[0115] The minimum transmission power threshold value is therefore chosen accordingly, selecting a higher value as the reflected electrical power increases, either linearly or using charts or lookup tables. This ensures effective radio signal transmission, taking into account the unfavorable case of a closed position and the environment of the detection device.

[0116] According to some embodiments, the quantity representing the reflection properties of the antenna is a Voltage Standing Wave Ratio calculated from the reflection coefficient of the antenna 28, the latter being determined from the measured value of reflected electrical power.

[0117] For example, in step 82, the determination of the emission power threshold value involves steps of comparing the calculated standing wave ratio value with a predefined value, and then choosing the emission power threshold value from a plurality of predefined values ​​based on the result of the comparison.

[0118] This second method therefore allows for a finer adjustment of the transmission power threshold value, in particular the minimum transmission power threshold value, to the environment of the antenna 28 in the closed position. Additionally, a relative transmission power threshold value, in particular the maximum transmission power threshold value, can be determined for the open position.

[0119] The embodiments and variants envisaged above can be combined with each other to give rise to new embodiments.

[0120] In particular, when the transceiver circuit 26 of the detection device 12 is operating in both transmit and receive modes, it is possible to fine-tune the transmit power threshold values, especially the maximum transmit power threshold value, according to the signal reception conditions at the remote station 14. This remote station 14 includes an electronic circuit comprising hardware and software means for evaluating the power level of a received radio signal, such as the RSSI (Received Signal Strength Indication). Through feedback, the remote station 14 can thus signal the detection device 12 to increase or decrease the maximum transmit power threshold value of the detection device 12, so that the wireless link has sufficient quality.

Claims

1. Method for configuring a device (12) for detecting the state of an openable member (2), in particular in a building, the openable member comprising a movable part associated with said detection device, the detection device comprising: a processor (22), a computer memory (24), a transceiver circuit (26) coupled to a radio antenna (28) and configured to establish a radio communication link with a remote reception station (14), and a set of sensors (20) for detecting the position of the moving part (4), characterised in that the method comprises the steps consisting of: - acquiring (62, 64), by the detection device (12), data influencing the quality of radio signal transmission, said data being representative of a characteristic of the material forming the openable member (2) and / or of a dimensional characteristic of the openable member (2); - determining (66), by the detection device (12), a radio transmission power threshold for radio message(s) of the transceiver circuit (26) ensuring sufficient quality of said communication link, for a closed position of the movable part, as a function of the acquired data; - recording (68) the transmission power threshold of radio message(s) associated with the data acquired in the memory (24) of the detection device.

2. Method according to the preceding claim, in which the step of acquiring data representative of a characteristic of the material forming the openable member (2) and / or of a dimensional characteristic of the openable member (2) comprises steps consisting of: - once the movable part (4) is in a closed position, sending (76) an electrical signal to the radio antenna (28) by means of the transceiver circuit (26) to emit a predefined radio frequency signal; - measuring (78) the electrical power reflected by the antenna back to the transceiver circuit; - calculating (80) a value representative of the antenna's reflection properties from the measured value; - determining (82) a threshold value for the maximum transmission power for the closed position as a function of the calculated value.

3. Method according to claim 2, wherein the representative quantity is a standing wave ratio calculated from an antenna reflection coefficient.

4. Method according to claim 1, in which the step of acquiring data representative of a dimensional characteristic of the openable member (2) and / or of a characteristic of the material forming the openable member (2) comprises the following steps: - automatically retrieving data provided by a user during installation of the detection device (12), such as the type of material used and / or the thickness of material surrounding the antenna when the movable part (4) of the openable member (2) is in the open and closed positions, and / or the distance between the antenna (28) and the movable part (4) of the openable member (2) in the closed position.

5. Configuration method according to one of the previous claims, including for at least one position determined from an open position of the movable part and a closed position of the movable part, a step of determining a minimum threshold value and a maximum threshold value of the transmission power.

6. Configuration method according to claim 5, in which a threshold value determined from the acquired data is a minimum power threshold for the closed position of the movable part (2).

7. Configuration method according to one of claims 5 or 6, in which the maximum transmission power threshold value determined for the open position of the movable part (4) is less than the maximum transmission power threshold value determined for the closed position of the movable part and in that the minimum transmission power threshold value determined for the open position of the movable part (4) is greater than the minimum transmission power threshold value determined for the closed position of the movable part.

8. Communication method implemented by a device (12) for detecting the state of an openable member (2), in particular in a building, the device having been previously configured by application of a configuration method according to one of the preceding claims, said communication method comprising steps consisting of: - the detection device (12) being installed in the movable part (4) of the openable member (2), identifying (52) a position of the movable part relative to the fixed part (6) of the opening member from among at least one open position and one closed position; - automatically selecting (54), by the detection device (12), a transmission-power threshold value associated with the identified position, determined during the configuration method; - emitting (56) a radio message, by means of the transceiver circuit (26) and the antenna (28), with a radio transmission power substantially equal to the transmission power threshold value selected for the position identified by the detection device.

9. A communication method according to claim 8, in which the device automatically detects (50) a change in position of the mobile part relative to the fixed part and identifies (52) the new position of the mobile part relative to the fixed part before transmitting a radio message.

10. A communication method according to any one of claims 8 to 9, wherein at least one sensor (20) of the detection device is coupled to a closing mechanism (10) of the openable member, and wherein the position identification is performed by said at least one sensor (20).

11. Detection device (12) for an openable member (2), particularly in a building, the opening member comprising a movable part associated with the said detection device, the detection device being characterised in that it is shaped to be associated with a movable part (4) of the openable member and in that it comprises a radio antenna and an electronic control unit programmed to implement a communication method according to one of claims 8 to 10.

12. An openable member (2), such as a window, a shutter or a door, comprising a fixed part (6) and a movable part (4) movable relative to the fixed part between at least one open position and one closed position, the movable part comprising a detection device (12) according to claim 11.