EP4264588A1 - Procede de surveillance d'objets comprenant respectivement des etiquettes retrodiffusant de signaux ambiants - Google Patents
Procede de surveillance d'objets comprenant respectivement des etiquettes retrodiffusant de signaux ambiantsInfo
- Publication number
- EP4264588A1 EP4264588A1 EP21815232.0A EP21815232A EP4264588A1 EP 4264588 A1 EP4264588 A1 EP 4264588A1 EP 21815232 A EP21815232 A EP 21815232A EP 4264588 A1 EP4264588 A1 EP 4264588A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- objects
- identification data
- list
- identification
- monitoring method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/22—Status alarms responsive to presence or absence of persons
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/22—Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
Definitions
- Method for monitoring objects comprising respectively backscattering tags using ambient signals
- the present invention relates to a method for monitoring objects, in particular to detect the proximity of two objects, or to detect the presence of an object in a geographical area.
- the method is intended to detect the unwanted proximity of two objects, or to detect the unwanted presence of an object in a geographical area.
- the invention finds an advantageous application for the monitoring and traceability of objects stored in containers or storage areas, in particular for the purpose of detecting the erroneous presence of an object at an undesired location or the proximity between objects.
- RFID technology for “Radio Frequency Identification”.
- An example of a known surveillance system consists in deploying a set of passive RFID readers in a geographical area. Each RFID reader permanently illuminates a part of the geographical area, with a radiofrequency wave, to detect objects provided with an RFID label or tag present in this part of the geographical area. Thanks to this monitoring system, objects are traced in order, for example, to determine the proximity situations of objects. This surveillance system can be used in epidemic situations, to detect people carrying these objects who are in the vicinity.
- Another surveillance system intended to trace people, and in particular to monitor possible proximity between people, uses mobile devices, such as smartphones, configured to communicate according to the low-consumption Bluetooth communication standard (“Bluetooth Low Energy” or BLE in English terminology).
- BLE Bluetooth Low Energy
- the mobile devices transmit and listen constantly, and must be connected to a central unit managing the tracing data via a BLE connection, WiFi or via a communication network, such as 4G, LoraWAN or other.
- the equipment used in surveillance systems using technologies of the RFID or BLE type emit continuously and are expensive.
- the monitoring of objects based on technologies of the type mentioned above generates high energy consumption and the cost of implementation is high.
- the invention aims to improve the situation and proposes an effective object monitoring method while reducing energy consumption.
- the invention relates, according to a first aspect, to a method for monitoring objects, the objects respectively comprising tags backscattering ambient signals.
- the monitoring method is implemented by a receiver device and comprises:
- the receiver device detects the presence of the object in the geographical area when it receives an ambient signal backscattered by the object comprising the tag backscattering the ambient signal. Once the presence of the object has been detected, the device determines, by means of the identification datum, whether the presence of the object in the geographical area is desired or not.
- the geographical zone corresponds to the geographical zone where the receiver device is located, or in other words the zone surrounding the receiver device.
- an object present by mistake in a location or geographical area can be identified.
- the desired presence of an object can be detected.
- the determination of the desired or unwanted presence of an object is very useful in the storage of objects, and in particular when the bringing into contact, or near, of certain objects must be avoided for example to prevent that situations of danger occur.
- the monitoring method comprises the reception of a second backscattered signal originating from at least one second object, the second backscattered signal corresponding to an ambient signal and comprising a message comprising identification data relating to said at least a second object, the determination of the desired or undesired presence of the first object in the geographical area further being implemented as a function of the identification datum relating to said at least one second object.
- the second datum relating to the identification of said at least one second object is taken into account to determine whether the presence of the first object is desired or not desired.
- identification data relating to the two objects are taken into account.
- the presence of an object can be undesirable in the presence of the other object or in other words the proximity of two objects (or several objects) can be undesired.
- the presence of an object may be undesirable in the presence of several objects.
- a typical example where the proximity of objects is monitored is the storage of chemical substances. Indeed, the proximity of certain chemical substances can present a danger.
- the determination of the desired or undesired presence includes the verification of the presence of the identification data item in a list of identification data, and the identification of the first object as being of desired presence or of non-desired presence. desired depending on the result of the verification.
- the list of identification data can be a list of identification data relating to objects whose presence in the geographical area is desired, a list of identification data relating to objects whose presence in the geographical area is not desired, or a list of identification data relating to objects whose proximity to each other is not desired.
- the determination of the desired or undesired presence of an object includes the verification of the identification data.
- this verification may include consulting a list of identification data to determine whether the identification data relating to the object contained in the backscattered signal received by the receiver device is present in the list. Depending on the result of this check, it is determined whether the presence of the object is desired or not desired.
- identification datum relating to an object may be datum uniquely identifying the object (object identifier) or else datum uniquely identifying a part of the object, for example a substance contained by the object.
- the verification includes the consultation of a list of identification data relating to objects whose presence in the geographical area is desired to verify whether the identification data relating to the first object is in the list .
- the verification includes consulting a list of identification data relating to objects whose presence in the geographical area is not desired, to verify whether the identification data relating to the object are in the list.
- the verification comprises the consultation of a list of identification data relating to objects whose proximity is not desired, to check whether the identification data relating to the object are in the list.
- the result of the consultation is positive, that is to say that the identification data relating to these objects are found in the list, it is determined that the proximity of these objects is not desired.
- placing the two objects close together, for example for storage should be avoided.
- the verification can be implemented for a number of objects greater than two. In general, if the result of the check is positive for several objects, putting these objects near should be avoided.
- Hazardous situations in which substances are mistakenly placed nearby can be avoided. Further, an object mistakenly stored in a geographical area can be detected.
- the monitoring method comprises retransmission to a monitoring server of the identification data contained in the first backscattered signal.
- the monitoring server can store the identification data of the objects detected by the receiver device.
- the monitoring server is linked to the receiver device via a communication network.
- This monitoring server can be a processing unit centrally managing the monitoring of objects.
- the monitoring method comprises retransmission to the monitoring server of the identification data contained in the second backscattered signal.
- the monitoring method includes the generation of an alert message intended to warn of the unwanted presence of the first object in the geographical area.
- the generation of the information message can be implemented by the receiver device, by the monitoring server or by both.
- the monitoring method includes the generation of an alert message intended to warn of the undesired proximity of the first object and of said at least one second object.
- the alert messages can be sent to user terminals to be returned to the user interface of the terminal.
- the information message can also be returned to the receiver device and/or the monitoring server.
- the characteristics of the monitoring method presented below can be taken alone or in combination with each other.
- the present invention relates, according to a second aspect, to a receiver device comprising: - a reception module configured to receive backscattered signals coming respectively from objects comprising labels backscattering ambient signals, the backscattered signals respectively comprising identification data relating to said objects;
- the present invention relates, according to a third aspect, to an object surveillance system comprising respectively tags backscattering ambient signals.
- the system comprises a transmitter device emitting ambient signals and a receiver device according to the invention and implementing the monitoring method according to the invention.
- the present invention relates, according to a fourth aspect, to a computer program capable of being implemented on a receiver device, the program comprising code instructions for the implementation of the steps of the monitoring method in accordance with the invention, when executed by a processor.
- the present invention relates, according to a fifth aspect, to an information medium readable by a processor in a receiver device, on which is recorded a computer program comprising code instructions for the implementation of the steps of the monitoring method in accordance to the invention, when executed by the processor.
- the receiver device, the monitoring system, the computer program and the information medium have characteristics and advantages similar to those described above in relation to the monitoring method.
- FIG. 1 is a diagram representing a monitoring system according to a first embodiment of the invention
- FIG. 2 is a diagram representing a monitoring system according to a second embodiment of the invention
- FIG. 3a illustrates the steps of a monitoring method in accordance with one embodiment of the invention in the form of an exchange between the entities of Figure 1;
- FIG. 3b illustrates steps of a monitoring method in accordance with one embodiment of the invention in the form of an exchange between the entities of Figure 2;
- FIG. 4a illustrates a hardware architecture that can implement the monitoring method according to the invention.
- FIG. 4b is a functional representation of a receiving device according to one embodiment of the invention.
- the invention applies to object surveillance systems, particularly for detecting the proximity between objects which must not be close to each other.
- the surveillance system in accordance with the invention uses ambient backscatter or backscatter of ambient signals emitted by a device transmitting radio frequency signals.
- Figure 1 shows a monitoring system 100 according to a first embodiment of the invention.
- the system comprises a transmitter device 1 E configured to transmit a radiofrequency signal, called “ambient signal”.
- the transmitter device 1 E is network equipment, such as a base station allowing communication between a terminal 2R and a mobile telephone network 10, such as 4G or 5G networks.
- the radiofrequency signal or ambient signal is a telephony signal, for example 4G or 5G.
- the base station (or transmitter device) 1E is configured to transmit signals to the terminal 2R as well as to receive signals from the terminal 2R.
- the radiofrequency signal may be different, for example a 2G, 3G, 5G or 5G mobile telephone signal, a WiFi, Bluetooth or other signal.
- the transmitter device 1 E may be different.
- it may be a residential gateway intended to connect an access network to a packet switching network, such as the Internet.
- the gateway can communicate with the terminal according to wireless communication standards such as WiFi, Bluetooth or others.
- the terminal 2R can be a mobile telephone terminal of the “Smartphone” type, a tablet, a personal computer or any other communicating object.
- the 2R terminal constitutes a 2R receiver device configured to receive ambient signals.
- the terminal 2R can be mobile in a geographic zone Z or fixed.
- the transmitter device 1E and the receiver device 2R can take different forms. Indeed, the base station and the terminal are given by way of non-limiting example.
- the base station 1 E transmits an ambient signal which can be a communication or signaling signal.
- the transmitter device and the base station are equivalent and carry the same reference 1 E.
- the receiver device and the terminal are equivalent in this embodiment and carry the same reference. reference 1 R.
- Each object 01, 02 includes a backscatter tag (tag in English terminology) T1, T2 configured to backscatter ambient signals transmitted by the transmitter device 1 E (here the base station 1 E) to the receiver device 2R (here the terminal 2R).
- a backscatter tag tag in English terminology
- T1 backscatter tag
- T2 configured to backscatter ambient signals transmitted by the transmitter device 1 E (here the base station 1 E) to the receiver device 2R (here the terminal 2R).
- the geographical zone Z corresponds to the geographical zone where the terminal 2R is located, or in other words the zone surrounding the terminal 2R.
- This zone Z can for example be a storage zone in a closed or open environment.
- the storage zone Z can be a space located in a hangar, a building, land, etc.
- the geographical zone Z corresponds to a geographical zone around the terminal 2R in which the terminal 2R can detect the objects, in particular the backscatter tags T1, T2.
- a backscatter tag is detected (and therefore the object carrying it) by the receiver device 2R when it receives an ambient signal backscattered by the backscatter tag, of a predefined power. That is, a backscattered ambient signal SR1,SR2 by a backscatter tag T1,T2 is considered to be received (and hence the backscatter tag T1,T2 is detected) when the power of the backscattered ambient signal SR1,SR2 at its reception at the receiver device 2R is equal to or greater than a detection threshold value. Below this detection threshold value, it is considered that the backscattered ambient signal SR1, SR2 is not received by the receiver device 2R, and that consequently the backscatter tag T1, T2 is not detected.
- the geographical zone Z around the terminal 2R corresponds to a geographical zone in which the power of the backscattered ambient signals SR1, SR2 received has a value equal to or greater than the predefined value.
- the geographical zone Z is spatially limited by this detection threshold value.
- the number of objects with backscatter tags T1 , T2 may be different.
- other terminals could be present in the geographical area Z and implement the invention.
- the objects 01, 02 are objects to be monitored by the monitoring system 100.
- the monitoring system 100 is configured to check whether the presence of the objects 01, 02 in the geographic zone Z is desired or not desired.
- the presence of certain objects O1, O2 is desired, that is to say that their presence is permitted or authorized, for example for their storage.
- the presence of other objects O1, O2 is not desired, that is to say that their presence, for example for their storage, in the geographical zone Z is not permitted.
- the presence of the object is not permitted taking into account the geographical zone Z.
- the presence of an object of a different type would not be desired.
- the simultaneous presence of two objects in a geographical area may not be desired. These may be objects whose proximity is to be avoided, for example chemical substances which should be kept away from each other as soon as putting them in contact or near them could present a danger.
- the transmitter device 1E and the receiver device 2R are configured to communicate with a monitoring server 3 via the communication network 10.
- This monitoring server 3 can be a processing unit centrally managing the monitoring of objects.
- FIG. 3a illustrates steps of the monitoring method according to a first embodiment of the invention, in the form of an exchange between the entities described with reference to FIG. 1.
- the monitoring method uses communications downlinks between the base station (transmitter device) 1E and the terminal (receiver device) 2R.
- the steps of the monitoring method are implemented by the receiver or terminal device 2R.
- the transmitter device or base station 1 E is configured to transmit ambient signals SA1, SA2.
- Each backscatter label or tag T1, T2 is configured to retransmit the ambient signals SA1, SA2 to the receiver or terminal device 2R.
- These retransmitted ambient signals SA1, SA2 are called backscattered signals SR1, SR2.
- FIG. 3a two ambient signals SA1, SA2 and two backscattered signals SR1, SR2 are represented.
- a first tag T1 retransmits a first ambient signal S1, that is to say backscatters a first backscattered signal SR1 and a second tag T2 retransmits a second ambient signal S2, that is to say backscatters a second backscattered signal SR2.
- These two ambient signals SA1, SA2 are for example transmitted at different times.
- the two labels T1, T2 can retransmit the same ambient signal SA1, SA2.
- the receiver or terminal device 2R is configured to receive the backscattered signals SR1, SR2.
- the terminal 2R receives E1 the first backscattered signal SR1 originating from the first object 01 , in particular from the first tag T1.
- the first backscattered signal SR1 includes a message, this message including identification data Id 1 relating to the first object 01 .
- the identification datum Id1 relating to the first object 01 can be an identification datum uniquely identifying the object, or a part of the object 01.
- the object can be a container and the identification data item relating to the object is content identification data.
- the identification data corresponds to a sequence of alphanumeric characters.
- the receiver device or terminal 2R receiving the first backscattered signal SR1 detects the first object 01.
- the terminal 2R is aware of the presence of the first object 01 in the geographical zone Z.
- the terminal 2R obtains the identification data relating to the first object 01 and stores it in a list listing the objects present in the geographical zone Z.
- the terminal 2R sends E2 to the monitoring server 3 the identification data Id1 relating to the first object 01, that is to say the identification data Id1 contained in the first backscattered signal SR1.
- the receiver or terminal device 2R After the receiver or terminal device 2R has detected the first object 01, it implements the determination E3 of a desired presence or of an undesired presence of the first object 01 in the geographical zone Z. In in other words, the terminal 2R determines E3 if the presence of the first object O1 is authorized or if the presence of the first object O1 is not authorized.
- the determination E3 is implemented according to the identification data Id 1 relating to the first object 01 .
- the determination E3 of the desired or undesired presence is implemented by checking E31 if the identification data is present in a list L of object identification data.
- this list of object identification data L is pre-recorded in the terminal 2R.
- the identification data list L can also be saved in the monitoring server 3.
- the terminal 2R implements the verification E31 of the presence of the identification data Id1 in the list of identification data L. In other embodiments (not represented), this verification is implemented by the monitoring server 3.
- the list L of identification data can take different forms.
- a first list of identification data L1 lists identification data relating to objects whose presence in the geographical zone Z is not desired.
- a second list of identification data L2 lists identification data relating to objects whose presence in the geographic zone Z is desired.
- the first object O1 is identified as having an unwanted presence. Thus, it is determined that the presence of the first object 01 is not desired.
- the first object 01 is identified E32 as being of presence desired. In other words, it is determined that the presence of the first object O1 is desired.
- the terminal 2R implements the generation E4 of an alert message intended to warn of the unwanted presence of the first object 01 in the geographical zone Z.
- the alert message ALT is played back on the terminal 2R to warn a user of the terminal 2R of the unwanted presence of the first object 01 .
- the ALT alert message can be sent to other terminals and/or to the monitoring server in order to be returned there.
- an information message MESS can be generated and then reconstituted on the terminal and/or sent to other terminals and/or to the monitoring server, to be returned.
- At least one of the determination E3 (verification E31 and identification E32), the generation E4 and the restitution E5 can be implemented by the monitoring server 3.
- the verification of the presence of the identification data in the list of identification data L1, L2 can be implemented in the monitoring server 3.
- the result of this verification can be sent to the terminal 2, so that the identification E32 of the first object is implemented in the terminal 2, or the identification E32 of the first object can be also implemented by the monitoring server 3.
- the monitoring server 3 can itself implement the generation E4 of the alert message or the information message as well as its restitution E5, and/or send it to the terminal 2R (and/or to other terminals) for return.
- the alert message ALT or the information message MESS can be sent to the transmitter device 1 E.
- the terminal 2 detects a second object 02 present in the geographical zone Z, that is to say it receives E2 a second backscattered signal SR2 originating from the second object 02, it determines E3 if the presence of the second project is desired or not desired in the geographical area Z.
- the backscattered signal includes a message including identification data Id2 relating to the second object 02.
- the terminal 2R (and/or the monitoring server 3) implements the steps described below E1 -E5 concerning the detection of the first object 01 , in a similar way for the second object 02.
- the first object O1 is detected at a first instant, this object being the only object detected at this first instant and that the second object is detected at a later instant.
- the presence of these objects in the geographic zone Z is concomitant.
- the first object and the second object can be detected simultaneously.
- the determination of the desired or undesired presence of the objects 01, 02 in the geographical zone Z can be conditioned by the concomitant presence of the objects in the geographical zone Z
- the simultaneous presence of objects in the geographical area that can be incompatible this incompatibility is taken into account in determining the desired or undesired presence of objects 01, 02.
- the verification of the presence of identification data in the list of identification data L, L1, L2 is implemented for the first object 01 and for the second object 02.
- the list of identification data L used can be a list of identification data L1 relating to objects of unwanted presence in the geographical zone Z or the list of data of identification L2 relating to objects of desired presence in the geographical zone Z.
- a third list of identification data L3 can include identification data relating to objects whose proximity to each other is not desired.
- the verification of the presence of the identification data Id1, Id2 of the first object 01 and of the second object 02 respectively includes the consultation in this list of identification data.
- the two objects 01, 02 are found in the list of identification data L3, these objects 01, 02 must not be placed close to one of the other. Thus, they are identified as objects that cannot be brought close to one another. Therefore, it is determined that the proximity of these objects is not desired, or in other words that they cannot be present simultaneously in the geographical area Z.
- the identification data Id1, Id2 relating to at least one of two objects 01, 02 is not present in the list L3, it is determined that the proximity of these objects 01, 02 is possible. In other words, the objects 01, 02 are identified as being able to be placed nearby. Thus, storage near these objects is possible.
- FIG. 2 represents a monitoring system 100' in accordance with a second embodiment of the invention.
- the equipment of the monitoring system of this embodiment is similar to the equipment of the monitoring system of FIG.
- the transmitter device 2E configured to transmit an ambient signal is a terminal 2E and the receiver device 1 R configured to detect backscattered signals is a base station 1 R.
- the monitoring system uses uplink communications between the terminal 2E and the base station 1R.
- the transmitter device 2E is a mobile telephone terminal of the “Smartphone” type, but can be a tablet, a personal computer or any other communicating object.
- the terminal can be mobile in a geographic zone Z or fixed.
- the receiver device 1 R can be another network equipment, such as a residential gateway intended to connect an access network to a packet switching network, such as the Internet.
- the gateway can communicate with the terminal according to wireless communication standards such as WiFi, Bluetooth or others.
- the transmitter device 2E and the receiver device 1R can take different forms. Indeed, the base station and the terminal are given by way of non-limiting example. These equipment being equivalent to those of the monitoring system of Figure 1, will not be described in detail here.
- the terminal 2E transmits an ambient signal which may be a communication or signaling signal, to the base station 1 R.
- each object 01, 02 comprises a backscatter tag T1, T2 configured to backscatter the ambient signal SA1, SA2 emitted by the transmitter device 1 (here the terminal) to the receiver device 2 (here the base station).
- the geographical zone Z corresponds to the geographical zone where the terminal 2E is located, or in other words the zone surrounding the terminal 2E.
- the number of objects carrying backscatter tags T1, T2 can be different.
- other terminals could be present in the geographical area Z and implement the invention.
- Objects 01, 02 are similar to those described with reference to FIG.
- FIG. 3b illustrates steps of the monitoring method according to a second embodiment of the invention, in the form of an exchange between the entities described with reference to FIG. 2.
- the monitoring method uses communications uplinks between the terminal (transmitter device) 2E and the base station (receiver device) 1 R.
- the monitoring method is implemented by the base station 1 E.
- two backscattered signals SR1, SR2 are received by the base station 1 R.
- the determination E3 of the desired or undesired presence of the objects 01 , 02 is implemented by checking the presence of the identification data Id1, Id2 relating respectively to the objects 01, 02, in the third list of identification data L3.
- the list of identification data L used can be a list of identification data L1 relating to objects of unwanted presence in the geographical zone Z or the list identification data L2 relating to desired presence objects in the geographical area Z.
- the two objects 01, 02 are found in the list of identification data L3, these objects 01, 02 must not be placed close to one of the other. Thus, they are identified E32 as objects that cannot be brought close to one another. Therefore, it is determined that the proximity of these objects is not desired, or in other words that they cannot be present simultaneously in the geographical zone Z.
- the base station 1 R implements the generation E4 of an alert message ALT intended to warn of the unwanted presence of the first object 01 in the geographical zone Z.
- the alert message ALT is returned to the base station 1 R, and can also be sent to the terminal 2E to warn a user of the terminal 2E of the unwanted presence of the first object 01 .
- the ALT alert message can be sent to other terminals and/or to the monitoring server in order to be returned there.
- identification data Id1, Id2 relating to at least one of two objects 01, 02 is not present in the list of identification data L3, it is determined that the proximity of these objects 01, 02 is possible .
- the objects 01, 02 are identified as being able to be placed nearby. Thus, storage near these objects is possible.
- an information message MESS can be generated and sent to the terminal 2E and to the monitoring server 3.
- FIG. 4a schematically illustrates a hardware architecture of a receiver device that can implement the monitoring method in accordance with the invention.
- the receiver device 2 can be a terminal (FIG. 1) or a base station (FIG. 2) or other network equipment.
- the receiver device 2R, 1 R comprises a communication bus 200 to which are connected:
- a processing unit 201 named in the figure CPU (for "Central Processing Unit") and may include one or more processors;
- a non-volatile memory 202 for example ROM (for “Read Only Memory”), EEPROM (for “Electrically Erasable Read Only Memory”) or a Flash memory;
- RAM Random Access Memory
- an input/output interface 204 named in the figure I/O (for “Input/Output”), for example keys or buttons, a screen, a keyboard, a mouse or another pointing device such as a touch screen or a remote control enabling a user to interact with the 2R receiver device, 1 R via a graphical interface or human-machine interface; and
- - communication interfaces 205 named COM in the figure, suitable for exchanging data for example with the transmitter device, with objects 01, 02 bearing backscatter tags T1, T2 or with a monitoring server via a communication network 10.
- RAM 203 includes registers suitable for recording variables and parameters created and modified during the execution of a computer program comprising instructions for implementing the monitoring method according to the invention.
- the program instruction codes stored in non-volatile memory 202 are loaded into RAM memory 203 with a view to being executed by the processing unit CPU 201 .
- the non-volatile memory 202 is for example a rewritable memory of the EEPROM or Flash memory type which can constitute a support within the meaning of the invention, that is to say which can comprise a computer program comprising instructions for the implementation of the monitoring method according to the invention.
- the rewritable memory may include lists listing the objects present in a geographical area and/or lists of identification data used for the implementation of the invention. Multiple lists of credentials can be saved.
- a list can be a list of identification data relating to objects whose presence in the geographical area is desired, a list of identification data relating to objects whose presence in the geographical area n is not desired, or a list of identification data relating to objects whose proximity to each other is not desired.
- FIG. 4b is a functional representation of a 2R,1R receiver device according to one embodiment. These modules include:
- reception module 31 configured to receive backscattered signals originating respectively from objects comprising labels backscattering ambient signals, the backscattered signals comprising respectively identification data relating to said objects;
- a determination module 32 configured to determine, as a function of the identification data relating to said objects received, a desired presence or an undesired presence of said objects in a geographical area or an undesired proximity of at least two objects.
- the module for determining the desired or undesired presence comprises
- a verification module 321 configured to verify the presence of the identification data item in a list L1; L2; L3 of identification data;
- an identification module 322 configured to identify the object as desired presence or unwanted presence depending on the result of the verification.
- the receiver device 2R, 1 R comprises:
- a transmission module 33 configured to transmit to a monitoring server, the identification data contained in the first backscattered signal, and the identification data contained in the second backscattered signal;
- a generation module 34 configured to generate an ALT alert message intended to warn of the unwanted presence of the first object in said geographical area or of the unwanted proximity of the first and second objects.
- the aforementioned modules and means are controlled by the processor of the processing unit 301. They can take the form of a program executable by a processor, or a material form (or “hardware”), such as a specialized integrated circuit (known in Anglo-Saxon terminology known as ASIC for "Application-Specific Integrated Circuit”), a system on chip (known in Anglo-Saxon terminology as a SoC for “System On Chip”), or an electronic component of the programmable logic circuit type, such as a component of the FPGA (for “Field-Programmable Gate Array”) type.
- a material form such as a specialized integrated circuit (known in Anglo-Saxon terminology known as ASIC for "Application-Specific Integrated Circuit"), a system on chip (known in Anglo-Saxon terminology as a SoC for “System On Chip”), or an electronic component of the programmable logic circuit type, such as a component of the FPGA (for “Field-Programmable Gate Array”) type.
- the transmitter device 1E, 2E also comprises a communication bus to which are connected a processing unit or microprocessor, a non-volatile memory, a random access memory or RAM, and a communication interface adapted in particular to exchanging data with the receiver device.
- the system according to the invention uses the backscatter of ambient signals does not consume large amounts of energy.
- the surveillance system according to the invention uses equipment already present in the networks and only requires backscatter tags as additional equipment. Since these backscatter tags are not expensive, the implementation of the monitoring system in accordance with the invention does not generate significant costs.
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Abstract
Description
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2013343A FR3117607A1 (fr) | 2020-12-16 | 2020-12-16 | Procédé de surveillance d’objets comprenant respectivement des étiquettes rétrodiffusant de signaux ambiants. |
| PCT/FR2021/051929 WO2022129714A1 (fr) | 2020-12-16 | 2021-11-03 | Procede de surveillance d'objets comprenant respectivement des etiquettes retrodiffusant de signaux ambiants |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4264588A1 true EP4264588A1 (fr) | 2023-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21815232.0A Pending EP4264588A1 (fr) | 2020-12-16 | 2021-11-03 | Procede de surveillance d'objets comprenant respectivement des etiquettes retrodiffusant de signaux ambiants |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12592144B2 (fr) |
| EP (1) | EP4264588A1 (fr) |
| CN (1) | CN116762113A (fr) |
| FR (1) | FR3117607A1 (fr) |
| WO (1) | WO2022129714A1 (fr) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120293307A1 (en) * | 2011-05-17 | 2012-11-22 | Astraion, LLC | RFID systems having improved read rates for localization and proximity detection |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107544054B (zh) * | 2017-08-15 | 2020-06-02 | 西京学院 | 一种基于环境反向散射的室内定位方法和装置 |
| CN111712727B (zh) * | 2018-02-13 | 2023-01-06 | 华为技术有限公司 | 协作辅助位置估计技术 |
| US10852413B2 (en) * | 2018-04-13 | 2020-12-01 | Nec Corporation | Tagging objects in indoor spaces using ambient, distributed backscatter |
| US11386761B2 (en) * | 2020-09-08 | 2022-07-12 | Sensormatic Electronics, LLC | Methods and apparatuses for detecting an unauthorized RF device |
-
2020
- 2020-12-16 FR FR2013343A patent/FR3117607A1/fr not_active Withdrawn
-
2021
- 2021-11-03 CN CN202180085259.9A patent/CN116762113A/zh active Pending
- 2021-11-03 US US18/257,919 patent/US12592144B2/en active Active
- 2021-11-03 WO PCT/FR2021/051929 patent/WO2022129714A1/fr not_active Ceased
- 2021-11-03 EP EP21815232.0A patent/EP4264588A1/fr active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120293307A1 (en) * | 2011-05-17 | 2012-11-22 | Astraion, LLC | RFID systems having improved read rates for localization and proximity detection |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3117607A1 (fr) | 2022-06-17 |
| US20240054880A1 (en) | 2024-02-15 |
| CN116762113A (zh) | 2023-09-15 |
| WO2022129714A1 (fr) | 2022-06-23 |
| US12592144B2 (en) | 2026-03-31 |
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