EP2254099A1 - System for detecting persons inside a passenger compartment of a vehicle, in particular an automobile - Google Patents
System for detecting persons inside a passenger compartment of a vehicle, in particular an automobile Download PDFInfo
- Publication number
- EP2254099A1 EP2254099A1 EP10161791A EP10161791A EP2254099A1 EP 2254099 A1 EP2254099 A1 EP 2254099A1 EP 10161791 A EP10161791 A EP 10161791A EP 10161791 A EP10161791 A EP 10161791A EP 2254099 A1 EP2254099 A1 EP 2254099A1
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- Prior art keywords
- seat
- vehicle
- reader
- label
- passenger compartment
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR 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
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0275—Electronic Article Surveillance [EAS] tag technology used for parent or child unit, e.g. same transmission technology, magnetic tag, RF tag, RFID
Definitions
- the present invention relates to a system for detecting the presence of persons inside a passenger compartment of a vehicle, particularly of automobile type, a detection kit for the installation of such a system, as well as a method of detection of persons by means of such a system.
- a detection kit for the installation of such a system as well as a method of detection of persons by means of such a system.
- this detection is implemented in the context of the operation of an anti-theft alarm system, it is usually effected by means of volumetric sensors able to detect any movement inside the passenger compartment by exploiting the effect Doppler.
- volumetric sensors able to detect any movement inside the passenger compartment by exploiting the effect Doppler.
- These include ultrasonic sensors or radiofrequency wave sensors, such as 2.4GHz.
- a technical problem to be solved by the object of the present invention is to propose a system for detecting people inside a passenger compartment of a vehicle, particularly of the automotive, system, which makes it possible to avoid the problems of the state of the art by notably offering substantially more functionalities, while remaining inexpensive.
- the proposed solution of the invention to this technical problem has as its first object a system for detecting persons inside a passenger compartment of a vehicle, particularly of the automotive type, characterized in that it comprises, on the one hand a radiofrequency tag reader positioned inside said and, secondly, at least one radiofrequency tag positioned at a seat of said vehicle so that said reader is able to read said tag when said seat is not occupied by a person, and that said reader is not able to read said label, when said seat is occupied by a person.
- the detection of different tags is performed in frequency bands that are normally allocated to the so-called RFID standard (for Radio Frequency IDentification) but which are well defined, namely 866 MHz or 2.4 GHz. It is known that at such frequencies, the reading of electronic tags is not possible through water, and therefore through a human body. Also, any label that is present but which becomes mute at a given moment will signal a seat occupied, the body of the passenger then forming screen between the reader and the label.
- the invention as thus defined has the advantage of using a single detection technology to ensure three distinct functions, namely the alarm functions. antitheft, seat occupancy control or even census of regulatory or optional mobile objects.
- Radio frequency tag technology is known from the state of the art. It will not be described in detail here. The following points are simply recalled: Radio frequency tags, also known as RFID tags, electronic tags, tags or transponders, are electronic identification elements, which include an electronic chip connected to the terminals of an antenna.
- a RFID tag reader is an active device, which is mainly composed of a circuit capable of radiofrequency transmission by means of one or more antennas, and electronics capable of receiving and decoding the information returned by the different labels before sending them to an ad hoc treatment system.
- seat means in the broad sense of the term, that is to say that it designates as well an individual seat, a portion of seat reserved for a passenger, or an auxiliary seat taking place on a seat of the vehicle as it is the case with a booster seat or a baby seat for example.
- each label will preferably be installed at a location offering a maximum probability of recovery in the event of occupancy of the seat, regardless of the size of the occupant.
- the identification technology is implemented by means of one or a plurality of passive radiofrequency tags, that is to say supplied with energy by the electromagnetic energy received from the reader, and each equipped with a unique identifier that can be read by a radio-frequency tag reader, to detect the presence of persons inside a passenger compartment of a vehicle and to deduce, where appropriate, the location of those persons in said passenger compartment.
- the identifier is returned by the label to the reader by ASK or FSK modulation.
- the figure 1 illustrates a motor vehicle 1 which has, on the one hand, four openings 11, 12, 13, 14 conventionally in the form of swinging side doors and, on the other hand, a passenger compartment equipped with five seats 21, 22, 23, 24, 25.
- a motor vehicle 1 which has, on the one hand, four openings 11, 12, 13, 14 conventionally in the form of swinging side doors and, on the other hand, a passenger compartment equipped with five seats 21, 22, 23, 24, 25.
- the motor vehicle 1 is also provided with a detection system 100 for identifying any presence of people inside the cabin.
- this detection system 100 comprises a radiofrequency label reader 110 which is positioned inside the passenger compartment, as well as a plurality of radiofrequency labels 121, 122, 123, 124, 125 which are positioned at the different seats 21, 22, 23, 24, 25 of the vehicle 1.
- the assembly is arranged such that each label 121, 122, 123, 124, 125 is positioned at the level of a so-called contact area of the seat 21, 22, 23, 24, 25, which is intended to be covered by the body of a passenger in case of occupation of the seat 21, 22, 23, 24, 25 in question.
- the reader 110 is positioned at the ceiling of the vehicle 1, that is to say, in height inside the passenger compartment. It is thus placed in an optimal position to communicate with the various labels 121, 122, 123, 124, 125 which are, for their part, distributed at a substantially lower level, and which, in this case, work only in reading . It should also be noted that a radio frequency tag 121, 122, 123, 124, 125 is associated with each seat 21, 22, 23, 24, 25 of the vehicle 1, and that each of them is incorporated in the seat of this vehicle. latest.
- the system 110 is adapted to operate in the frequency band of the tags 121, 122, 123, 124, 125, that is to say either 866 MHz or 2.4 GHz. But in a particularly advantageous way, it is also able to operate in Doppler mode.
- the reader 110 is fixedly mounted in the passenger compartment of the vehicle 1, while each label 121, 122, 123, 124, 125 is inserted inside its seat. 21, 22, 23, 24, 25 at a location opposite the corresponding contact area.
- the detection system 100 is in other words a system of original equipment. This means that all its components are permanently implanted in the cabin, including a reader 110 fixedly mounted, and labels 121, 122, 123, 124, 125 integrated directly inside the seats 21, 22, 23, 24, 25.
- the detection system 100 will advantageously be provided with interface means 130 with said central computer. 30.
- the central computer 30 is concretely constituted by an intelligent service housing (BSI).
- the detection system 100 is further provided with connection means 140 able to electrically connect the reader 110 to a power source 40 belonging to the vehicle 1.
- the detection system 100 is an original system
- the connection means 140 are in the form of a conventional power cable, which provides a substantially direct connection between the 110 and the power supply 40.
- this power source 40 is here the battery of the vehicle 1.
- the detection system 100 comprises , for each auxiliary seat 26, two RFID tags 126a, 126b to be secured respectively on either side of said auxiliary seat 26.
- This feature advantageously makes it possible to use the detection system 100 to perform a census of moving objects inside the passenger compartment of the vehicle 1, but also to determine the precise orientation of each of these objects by exploiting the fact that the two corresponding labels do not have the same proximity to the reader 110.
- auxiliary seat 26 which is in the form of a baby seat.
- the latter is positioned back to the road on the seat of the right front seat 22.
- the two tags 126a, 126b, which function only in reading, are glued on the side flanks respectively left and right of the auxiliary seat 26.
- the auxiliary seat 26 could very well integrate an equivalent radio-frequency label labels 121, 122, 123, 124, 125 which are associated with the seats 21, 22, 23, 24, 25.
- the figure 2 is a diagram illustrating the electronic architecture of the reader 110. It is observed that the antenna is composed of two radiating elements AG and AD which are connected to the output of the transmitter and to the input of the receiver via a radiofrequency circulator C. We also note the presence of two left and right radiofrequency inputs entering a demodulator D to be then amplified A. It is then noted the existence of four inputs of an analog / digital converter which are integrated in a microcontroller ⁇ C host of the reader.
- This microcontroller ⁇ C is responsible for analyzing the frequency spectrum of each of the incoming channels, measuring the amplitude of the spectrum on each of the channels, and estimating the position of the labels or Doppler sources by a combination of two techniques, one using the principle of single pulse (mono-pulse) amplitude on each component of the spectrum, the other based on a modulation of the power transmitted to limit the scope.
- the microcontroller still fulfills other functions, such as the analysis of the codes emitted by the labels for the establishment of a cartography before occupying the vehicle, the detection of the missing codes and the analysis of the Doppler, the control of the frequency and the power emitted, the interfacing with the vehicle to know its status, interfacing with the vehicle to transmit to it the mapping of the occupied seats and a possible request for inhibition of the air bags, the generating an alarm when a person remains locked in the vehicle.
- the figure 3 represents a motor vehicle 1 which is provided with a detection system 200 according to a second embodiment of the invention. This is distinguished from the first described above, essentially by the fact that the detection system 200 is a retrofit system, sold in the form of a kit.
- the detection kit comprises a radiofrequency label reader 210 which is removably mounted inside the passenger compartment of the vehicle 1, while each label (not shown here) is secured to its seat 21, 22, 23, 24, 25 at a location at the corresponding contact area.
- the removable mounting of the reader 210 can be achieved using any known reversible fixation method, such as clipping.
- the fastening of each label can take place using any known fastening technique, such as gluing.
- the reader 210 operates at 2.4 GHz. It is located at the top of the door, while the different labels, which work only in reading, are glued directly to the seat cushion.
- the vehicle 1 having a multimedia system 50 the detection system 200 is provided with wireless communication means with said multimedia system 50.
- the The means of communication in question are of the Bluetooth (registered trademark) type, that is to say that they implement a short-distance radio technology.
- the detection system 200 also has connection means 240 able to electrically connect the reader 210 to a power supply 40 belonging to the vehicle 1.
- the detection system 200 being a retrofit system
- the reader 210 can not take its power supply directly from the electrical source 40.
- the power supply source 40 is here again constituted by the battery of the vehicle 1.
- the invention also relates to a detection method by means of a detection system 100, 200 as previously defined, which is suitable for any vehicle 1 having at least one opening 11, 12, 13, 14 giving access to a passenger compartment containing at least one seat 21, 22, 23, 24, 25.
- the detection method may further comprise a step according to which an alarm is generated when starting the vehicle 1 since at least one seat 21, 22, 23, 24, 25 is occupied without the corresponding safety belt being buckled.
- this stage of the process can be implemented indifferently after having established the mapping of the potential occupation of the seats, or after having established the map of effective occupation of the latter.
- the latter may be of any type and in particular of sound type, and / or visual, and / or vibratory.
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Abstract
Description
La présente invention concerne un système permettant de détecter la présence de personnes à l'intérieur d'un habitacle d'un véhicule notamment de type automobile, un kit de détection pour l'installation d'un tel système, ainsi qu'un procédé de détection de personnes au moyen d'un tel système. Il existe différentes manières de détecter des personnes à l'intérieur d'un habitacle d'un véhicule automobile.The present invention relates to a system for detecting the presence of persons inside a passenger compartment of a vehicle, particularly of automobile type, a detection kit for the installation of such a system, as well as a method of detection of persons by means of such a system. There are different ways to detect people inside a passenger compartment of a motor vehicle.
Lorsque cette détection est mise en oeuvre dans le cadre du fonctionnement d'un système d'alarme antivol, elle s'opère habituellement au moyen de capteurs volumétriques à même de détecter tout mouvement à l'intérieur de l'habitacle en exploitant l'effet Doppler. Il s'agit notamment de capteurs à ultrasons ou de capteurs à ondes radiofréquences, de 2,4GHz par exemple.When this detection is implemented in the context of the operation of an anti-theft alarm system, it is usually effected by means of volumetric sensors able to detect any movement inside the passenger compartment by exploiting the effect Doppler. These include ultrasonic sensors or radiofrequency wave sensors, such as 2.4GHz.
Ce type de technique de détection présente cependant l'inconvénient d'avoir un champ d'application relativement restreint, puisque limité à la seule protection antivol.This type of detection technique, however, has the disadvantage of having a relatively limited scope of application, since it is limited to anti-theft protection alone.
En revanche, lorsque la détection est mise en oeuvre pour réaliser un contrôle d'occupation de sièges, elle est traditionnellement réalisée en équipant chaque siège de capteurs de pression qui sont organisés en nappes et qui sont placés de façon judicieuse dans l'assise de chaque siège.On the other hand, when the detection is implemented to carry out seat occupancy control, it is traditionally performed by equipping each seat with pressure sensors which are organized into webs and which are judiciously placed in the seat of each seat. seat.
Une telle technologie présente toutefois plusieurs désavantages. Elle s'avère tout d'abord onéreuse compte tenu du coût relativement élevé des nappes de capteurs. Elle requiert ensuite quantité de connexions avec le véhicule. Enfin, sa fiabilité n'est pas absolue. Le système de détection peut en effet être facilement induit en erreur, dans la mesure où il n'est pas capable de faire le distinguo entre une personne et une charge lourde inerte.Such technology, however, has several disadvantages. It is initially expensive because of the relatively high cost of sensor plies. It then requires a lot of connections with the vehicle. Finally, its reliability is not absolute. The The detection system can indeed be easily misled, since it is not able to distinguish between a person and an inert heavy load.
Compte tenu de ce qui précède, un problème technique à résoudre par l'objet de la présente invention, est de proposer un système de détection de personnes à l'intérieur d'un habitacle d'un véhicule, notamment de type automobile, système, qui permet d'éviter les problèmes de l'état de la technique en offrant notamment sensiblement plus de fonctionnalités, tout en demeurant peu onéreux.In view of the foregoing, a technical problem to be solved by the object of the present invention is to propose a system for detecting people inside a passenger compartment of a vehicle, particularly of the automotive, system, which makes it possible to avoid the problems of the state of the art by notably offering substantially more functionalities, while remaining inexpensive.
La solution proposée de l'invention à ce problème technique a pour premier objet un système de détection de personnes à l'intérieur d'un habitacle d'un véhicule notamment de type automobile, caractérisé en ce qu'il comporte, d'une part, un lecteur d'étiquettes radiofréquences positionné à l'intérieur dudit et, d'autre part, au moins une étiquette radiofréquence positionnée au niveau d'un siège dudit véhicule de manière que ledit lecteur soit apte à lire ladite étiquette lorsque ledit siège n'est pas occupé par une personne, et que ledit lecteur ne soit pas apte à lire ladite étiquette, lorsque ledit siège est occupé par une personne.The proposed solution of the invention to this technical problem has as its first object a system for detecting persons inside a passenger compartment of a vehicle, particularly of the automotive type, characterized in that it comprises, on the one hand a radiofrequency tag reader positioned inside said and, secondly, at least one radiofrequency tag positioned at a seat of said vehicle so that said reader is able to read said tag when said seat is not occupied by a person, and that said reader is not able to read said label, when said seat is occupied by a person.
Elle a pour second objet un kit de détection de personnes à l'intérieur d'un habitacle d'un véhicule notamment de type automobile, caractérisé en ce qu'il comporte, d'une part, un lecteur d'étiquettes radiofréquences destiné à être positionné à l'intérieur dudit habitacle et, d'autre part, au moins une étiquette radiofréquence destinée à être positionnée au niveau d'un siège dudit véhicule de manière que ledit lecteur soit apte à lire ladite étiquette lorsque ledit siège n'est pas occupé par une personne, et que ledit lecteur ne soit pas apte à lire ladite étiquette lorsque ledit siège est occupé par une personne.
Elle a pour troisième objet un procédé de détection de personnes à l'intérieur d'un habitacle d'un véhicule (1) notamment de type automobile caractérisé en ce qu'il comprend les étapes suivantes selon lesquelles :
- on fournit, d'une part, un lecteur d'étiquettes radiofréquences (110, 210) que l'on positionne ledit lecteur à l'intérieur dudit habitacle et, d'autre part, au moins une étiquette radiofréquence (121, 122, 123, 124, 125) que l'on positionne au niveau d'un siège (21, 22, 23, 24, 25) dudit véhicule (1) de manière que ledit lecteur soit apte à lire ladite étiquette lorsque ledit siège n'est pas occupé par une personne, et que ledit lecteur ne soit pas apte à lire ladite étiquette, lorsque ledit siège est occupé par une personne ; et
- on lit la présence de ladite étiquette au moyen dudit lecteur.
Its third object is a method for detecting persons inside a passenger compartment of a vehicle (1), particularly of the automotive type, characterized in that it comprises the following steps according to which:
- on the one hand, a radio frequency label reader (110, 210) which is positioned said reader inside said passenger compartment and, on the other hand, at least one radiofrequency label (121, 122, 123 , 124, 125) which is positioned at a seat (21, 22, 23, 24, 25) of said vehicle (1) so that said reader is able to read said label when said seat is not occupied by a person, and that said reader is not able to read said label, when said seat is occupied by a person; and
- the presence of said label is read by means of said reader.
Concrètement, la détection des différentes étiquettes est réalisée dans des bandes de fréquences qui sont normalement allouées au standard dit RFID (pour Radio-Frequency IDentification) mais qui sont bien définies, à savoir 866 MHz ou 2,4 GHz. Il est en effet connu, qu'à de telles fréquences, la lecture d'étiquettes électroniques n'est pas possible au travers de l'eau, et donc au travers d'un corps humain. Aussi, toute étiquette que l'on sait présente mais qui devient muette à un instant donné signalera un siège occupé, le corps du passager formant alors écran entre le lecteur et l'étiquette. L'invention telle qu'ainsi définie présente l'avantage d'utiliser une seule et même technologie de détection pour assurer trois fonctions distinctes, à savoir les fonctions d'alarme antivol, de contrôle d'occupation des sièges, voire de recensement d'objets mobiles règlementaires ou optionnels.Specifically, the detection of different tags is performed in frequency bands that are normally allocated to the so-called RFID standard (for Radio Frequency IDentification) but which are well defined, namely 866 MHz or 2.4 GHz. It is known that at such frequencies, the reading of electronic tags is not possible through water, and therefore through a human body. Also, any label that is present but which becomes mute at a given moment will signal a seat occupied, the body of the passenger then forming screen between the reader and the label. The invention as thus defined has the advantage of using a single detection technology to ensure three distinct functions, namely the alarm functions. antitheft, seat occupancy control or even census of regulatory or optional mobile objects.
L'invention sera mieux comprise à la lecture de la description non limitative qui suit, et au regard des dessins annexés dans lesquels :
- la
figure 1 montre, en vue de dessus, un véhicule automobile doté d'un système de détection conforme à un premier mode de réalisation de l'invention ; - la
figure 2 est un schéma illustrant l'architecture électronique du lecteur d'étiquettes radiofréquences équipant le système de détection de lafigure 1 ; et - la
figure 3 fait apparaître, en vue de dessus, un véhicule automobile pourvu d'un système de détection conforme à un second mode de réalisation de l'invention.
- the
figure 1 shows, in plan view, a motor vehicle equipped with a detection system according to a first embodiment of the invention; - the
figure 2 is a diagram illustrating the electronic architecture of the radiofrequency label reader equipping the detection system of thefigure 1 ; and - the
figure 3 shows, in top view, a motor vehicle provided with a detection system according to a second embodiment of the invention.
La technologie des étiquettes radiofréquences est connue de l'état de la technique. Elle ne sera pas décrite en détail ici. On rappellera simplement les points suivants : les étiquettes radiofréquences encore appelées étiquettes RFID, étiquettes électroniques, tags ou transpondeurs, sont des éléments d'identification électronique, qui comprennent une puce électronique connectée aux bornes d'une antenne. Un lecteur d'étiquettes radiofréquences est un dispositif actif, qui est principalement composé d'un circuit capable d'émettre des radiofréquences au moyen d'une ou plusieurs antennes, et d'une électronique à même de recevoir et de décoder les informations renvoyées par les différentes étiquettes avant de les envoyer vers un système de traitement ad hoc.Radio frequency tag technology is known from the state of the art. It will not be described in detail here. The following points are simply recalled: Radio frequency tags, also known as RFID tags, electronic tags, tags or transponders, are electronic identification elements, which include an electronic chip connected to the terminals of an antenna. A RFID tag reader is an active device, which is mainly composed of a circuit capable of radiofrequency transmission by means of one or more antennas, and electronics capable of receiving and decoding the information returned by the different labels before sending them to an ad hoc treatment system.
Il est également important de souligner que, dans l'ensemble de la présente description, la notion de siège s'entend au sens large du terme, c'est-à-dire qu'elle désigne aussi bien un siège individuel, une portion de banquette dévolue à un passager, ou un siège auxiliaire prenant place sur un siège du véhicule comme c'est le cas avec un rehausseur ou un siège bébé par exemple.It is also important to emphasize that throughout this description, the notion of seat means in the broad sense of the term, that is to say that it designates as well an individual seat, a portion of seat reserved for a passenger, or an auxiliary seat taking place on a seat of the vehicle as it is the case with a booster seat or a baby seat for example.
Enfin, on peut préciser que, dans la suite de la présente description, la zone de contact du siège s'étend aussi bien au niveau de l'assise, qu'au niveau du dossier du siège. Ceci étant, dans la pratique, chaque étiquette sera implantée de préférence à un emplacement offrant une probabilité de recouvrement maximale en cas d'occupation du siège, quel que soit le gabarit de l'occupant.Finally, it may be noted that, in the remainder of this description, the contact area of the seat extends as well at the seat, as at the seat back. This being so, in practice, each label will preferably be installed at a location offering a maximum probability of recovery in the event of occupancy of the seat, regardless of the size of the occupant.
Selon l'invention, la technologie d'identification est mise en oeuvre au moyen d'une ou d'une pluralité d'étiquettes radiofréquences passives, c'est-à-dire alimentées en énergie par l'énergie électromagnétique reçue du lecteur, et munies chacune d'un identifiant unique susceptible d'être lu par un lecteur d'étiquettes radiofréquences, pour détecter la présence de personnes à l'intérieur d'un habitacle d'un véhicule et déduire, le cas échéant, la localisation desdites personnes dans ledit habitacle. L'identifiant est renvoyé par l'étiquette au lecteur par modulation ASK ou FSK.According to the invention, the identification technology is implemented by means of one or a plurality of passive radiofrequency tags, that is to say supplied with energy by the electromagnetic energy received from the reader, and each equipped with a unique identifier that can be read by a radio-frequency tag reader, to detect the presence of persons inside a passenger compartment of a vehicle and to deduce, where appropriate, the location of those persons in said passenger compartment. The identifier is returned by the label to the reader by ASK or FSK modulation.
La
Le véhicule automobile 1 est par ailleurs pourvu d'un système de détection 100 permettant de repérer toute présence de personnes à l'intérieur de l'habitacle. Conformément à l'objet de la présente invention, ce système de détection 100 comprend un lecteur d'étiquettes radiofréquences 110 qui est positionné à l'intérieur de l'habitacle, ainsi qu'une pluralité d'étiquettes radiofréquences 121, 122, 123, 124, 125 qui sont positionnées au niveau des différents sièges 21, 22, 23, 24, 25 du véhicule 1. L'ensemble est agencé de telle sorte que chaque étiquette 121, 122, 123, 124, 125 soit positionnée au niveau d'une zone dite de contact du siège 21, 22, 23, 24, 25, qui est destinée à être recouverte par le corps d'un passager en cas d'occupation du siège 21, 22, 23, 24, 25 en question.The motor vehicle 1 is also provided with a
Dans ce mode particulier de réalisation, le lecteur 110 est positionné implanté au niveau du plafonnier du véhicule 1, c'est-à-dire en hauteur à l'intérieur de l'habitacle. Il est ainsi placé dans une position optimale pour communiquer avec les différentes étiquettes 121, 122, 123, 124, 125 qui sont, quant à elles, réparties à un niveau sensiblement plus bas, et qui, dans le cas présent, fonctionnent uniquement en lecture. On note par ailleurs qu'une étiquette radiofréquences 121, 122, 123, 124, 125 est associée à chaque siège 21, 22, 23, 24, 25 du véhicule 1, et que chacune d'elles est incorporée dans l'assise de ce dernier.In this particular embodiment, the
Par définition, le système 110 est adapté pour fonctionner dans la bande de fréquence des étiquettes 121, 122, 123, 124, 125, c'est-à-dire soit 866 MHz, soit 2,4 GHz. Mais de manière particulièrement avantageuse, il est également en mesure de fonctionner en mode Doppler.By definition, the
Conformément à un premier mode de réalisation de l'invention, le lecteur 110 est monté de manière fixe dans l'habitacle du véhicule 1, tandis que chaque étiquette 121, 122, 123, 124, 125 est insérée à l'intérieur de son siège 21, 22, 23, 24, 25 à un emplacement situé en regard de la zone de contact correspondante. Le système de détection 100 constitue en d'autres termes un système de première monte. Cela signifie que tous ses composants sont implantés de manière durable dans l'habitacle, avec notamment un lecteur 110 monté fixement, et des étiquettes 121, 122, 123, 124, 125 intégrées directement à l'intérieur des sièges 21, 22, 23, 24, 25.According to a first embodiment of the invention, the
Dans une telle configuration, et dans le cas où comme ici le véhicule 1 comprend par ailleurs un calculateur central 30 chargé de piloter ses différentes fonctions électriques et électroniques, le système de détection 100 sera avantageusement doté de moyens d'interface 130 avec ledit calculateur central 30. Dans cet exemple de réalisation, étant donné que le véhicule 1 dispose d'une architecture électrique multiplexée, le calculateur central 30 est concrètement constitué par un boîtier de servitude intelligent (BSI).In such a configuration, and in the case where, as here, the vehicle 1 furthermore comprises a
Selon une particularité de l'invention, le système de détection 100 est en outre pourvu de moyens de connexion 140 à même de relier électriquement le lecteur 110 à une source d'alimentation électrique 40 appartenant au véhicule 1. Dans cet exemple de réalisation, le système de détection 100 étant un système de première monte, les moyens de connexion 140 se présentent sous la forme d'un câble d'alimentation classique, qui assure une liaison sensiblement directe entre le lecteur 110 et la source d'alimentation électrique 40. De manière particulièrement avantageuse, cette source d'alimentation électrique 40 est ici la batterie du véhicule 1.According to a feature of the invention, the
Selon une autre particularité de l'invention, lorsque le véhicule 1 comprend au moins un siège auxiliaire 26 de type rehausseur ou siège bébé, installé de façon amovible sur un siège 21, 22, 23, 24, 25, le système de détection 100 comporte, pour chaque siège auxiliaire 26, deux étiquettes RFID 126a, 126b à solidariser respectivement de part et d'autre dudit siège auxiliaire 26.According to another feature of the invention, when the vehicle 1 comprises at least one
Cette caractéristique permet avantageusement d'utiliser le système de détection 100 pour effectuer un recensement d'objets mobiles à l'intérieur de l'habitacle du véhicule 1, mais aussi de déterminer l'orientation précise de chacun de ces objets en exploitant le fait que les deux étiquettes correspondantes n'ont pas la même proximité par rapport au lecteur 110.This feature advantageously makes it possible to use the
Dans cet exemple de réalisation, on dénombre uniquement un siège auxiliaire 26 qui se présente sous la forme d'un siège bébé. Ce dernier est positionné dos à la route sur l'assise du siège avant droit 22. Les deux étiquettes 126a, 126b, qui fonctionnent uniquement en lecture, sont collées sur les flancs latéraux respectivement gauche et droite du siège auxiliaire 26. Il est à noter que le siège auxiliaire 26 pourrait très bien intégrer une étiquette radiofréquences équivalente aux étiquettes 121, 122, 123, 124, 125 qui sont associées aux sièges 21, 22, 23, 24, 25.In this embodiment, there is only one
La
Ce microcontrôleur µC est chargé de l'analyse du spectre fréquentiel de chacune des voies entrantes, de la mesure de l'amplitude du spectre sur chacune des voies, et de l'estimation de la position des étiquettes ou des sources Doppler par une combinaison de deux techniques, l'une utilisant le principe à impulsion simple (mono-pulse) d'amplitude sur chaque composante du spectre, l'autre s'appuyant sur une modulation de la puissance émise pour limiter la portée.This microcontroller μC is responsible for analyzing the frequency spectrum of each of the incoming channels, measuring the amplitude of the spectrum on each of the channels, and estimating the position of the labels or Doppler sources by a combination of two techniques, one using the principle of single pulse (mono-pulse) amplitude on each component of the spectrum, the other based on a modulation of the power transmitted to limit the scope.
Mais le microcontrôleur remplit encore d'autres fonctions, comme l'analyse des codes émis par les étiquettes pour l'établissement d'une cartographie avant occupation du véhicule, la détection des codes manquants et l'analyse des Doppler, le contrôle de la fréquence et de la puissance émise, l'interfaçage avec le véhicule pour connaître son état, l'interfaçage avec le véhicule pour lui transmettre la cartographie des sièges occupés et une éventuelle demande d'inhibition es coussins de sécurité gonflables (Air Bags), la génération d'une alarme lorsqu'une personne reste enfermée dans le véhicule.But the microcontroller still fulfills other functions, such as the analysis of the codes emitted by the labels for the establishment of a cartography before occupying the vehicle, the detection of the missing codes and the analysis of the Doppler, the control of the frequency and the power emitted, the interfacing with the vehicle to know its status, interfacing with the vehicle to transmit to it the mapping of the occupied seats and a possible request for inhibition of the air bags, the generating an alarm when a person remains locked in the vehicle.
La
Le kit de détection comprend un lecteur d'étiquettes radiofréquences 210 qui est monté de façon amovible à l'intérieur de l'habitacle du véhicule 1, tandis que chaque étiquette (non représentées ici) est solidarisée à son siège 21, 22, 23, 24, 25 à un emplacement situé au niveau de la zone de contact correspondante.The detection kit comprises a
Il est entendu ici que le montage amovible du lecteur 210 peut être réalisé en utilisant toute méthode de fixation réversible connue, comme par exemple le clipsage. De la même manière, la solidarisation de chaque étiquette peut s'opérer en mettant en oeuvre toute technique de fixation connue, comme par exemple le collage.It is understood here that the removable mounting of the
Dans ce mode particulier de réalisation, choisi là encore uniquement à titre d'exemple, le lecteur 210 fonctionne à 2,4 GHz. Il est implanté au niveau d'un bandeau de haut de porte, tandis que les différentes étiquettes, qui fonctionnent uniquement en lecture, sont collées directement à l'assise des sièges.In this particular embodiment, chosen again only by way of example, the
Selon une particularité de ce second mode de réalisation, le véhicule 1 disposant d'un système multimédia 50, le système de détection 200 est doté de moyens de communication sans fils avec ledit système multimédia 50. Dans cet exemple de réalisation, les moyens de communication en question sont de type Bluetooth (marque déposée), c'est-à-dire qu'ils mettent en oeuvre une technologie radio courte distance.According to a feature of this second embodiment, the vehicle 1 having a
Il est à noter qu'en théorie, une telle caractéristique pourrait très bien être adoptée sur le système de détection 100 du premier mode de réalisation.It should be noted that in theory, such a characteristic could very well be adopted on the
Comme dans le cas du premier mode de réalisation, le système de détection 200 dispose en outre de moyens de connexion 240 à même de relier électriquement le lecteur 210 à une source d'alimentation électrique 40 appartenant au véhicule 1.As in the case of the first embodiment, the
Dans cet exemple de réalisation, le système de détection 200 étant un système de seconde monte, le lecteur 210 ne peut pas prendre son énergie d'alimentation directement de la source électrique 40.In this embodiment, the
Il doit plutôt pouvoir être connecté au niveau d'un point d'alimentation intermédiaire directement accessible depuis l'habitacle. On pense notamment ici à une prise allume-cigare ou à un connecteur dédié pré-installé comme dans l'exemple de la
L'invention est également relative à un procédé de détection au moyen d'un système de détection 100, 200 tel que précédemment défini, qui est adapté à tout véhicule 1 disposant d'au moins un ouvrant 11, 12, 13, 14 donnant accès à un habitacle renfermant au moins un siège 21, 22, 23, 24, 25.The invention also relates to a detection method by means of a
Ce procédé est remarquable en ce qu'il comporte les étapes suivantes selon lesquelles :
- on détecte l'ouverture d'au moins
11, 12, 13, 14, par exemple dès le déverrouillage de ce dernier ;un ouvrant - on active le lecteur 110, 210 en mode d'identification radiofréquences (RFID) pour détecter chaque étiquette 121, 122, 123, 124, 125 présente à l'intérieur de l'habitacle ;
- on identifie et localise chaque étiquette détectée 121, 122, 123, 124, 125 pour établir une cartographie des sièges vacants 21, 22, 23, 24, 25 avant occupation du véhicule 1 ;
- on détecte la fermeture de chaque ouvrant 11, 12, 13, 14 ainsi que la fermeture du circuit électrique du véhicule 1, en d'autres termes le démarrage imminent dudit véhicule 1 ;
- on identifie et localise toute étiquette 121, 122, 123, 124, 125 encore détectable pour établir une cartographie des sièges vacants 21, 22, 23, 24, 25 après occupation du véhicule 1 ;
- on compare la cartographie des sièges vacants 21, 22, 23, 24, 25 avant occupation avec la cartographie des sièges vacants 21, 22, 23, 24, 25 après occupation du véhicule 1, et on déduit la présence probable d'un passager sur chaque siège 21, 22, 23, 24, 25
121, 122, 123, 124, 125 reste muette ; etdont l'étiquette - on établit une cartographie d'occupation potentielle des sièges 21, 22, 23, 24, 25.
- the opening of at least one
11, 12, 13, 14 is detected, for example as soon as the latter is unlocked;opening - the
110, 210 is activated in radio frequency identification (RFID) mode to detect eachreader 121, 122, 123, 124, 125 present inside the passenger compartment;label - identifying and locating each detected
121, 122, 123, 124, 125 to map thetag 21, 22, 23, 24, 25 prior to occupying the vehicle 1;vacant seats - detecting the closing of each
11, 12, 13, 14 and the closing of the electric circuit of the vehicle 1, in other words the imminent start of said vehicle 1;opening - any
121, 122, 123, 124, 125 still detectable is identified and located to establish a map of thelabel 21, 22, 23, 24, 25 after occupation of the vehicle 1;vacant seats - the mapping of the
21, 22, 23, 24, 25 before occupation is compared with the mapping of thevacant seats 21, 22, 23, 24, 25 after occupation of the vehicle 1, and the probable presence of a passenger on eachvacant seats 21, 22, 23, 24, 25 whoseseat 121, 122, 123, 124, 125 remains silent; andlabel - a mapping of the potential occupation of the
21, 22, 23, 24, 25 is made.seats
Selon une particularité de l'invention, après l'étape d'établissement de la cartographie d'occupation potentielle des sièges 21, 22, 23, 24, 25, le procédé peut comporter en outre les étapes selon lesquelles :
- on active le lecteur 110, 210 en mode Doppler en direction de chaque siège 21, 22, 23, 24, 25 associé à une étiquette 121, 122, 123, 124, 125 muette, pour détecter la présence effective d'un occupant sur ledit siège 21, 22, 23, 24, 25 ; et
- on établit une cartographie d'occupation effective des sièges 21, 22, 23, 24, 25.
- the
110, 210 is activated in Doppler mode towards eachreader 21, 22, 23, 24, 25 associated with aseat 121, 122, 123, 124, 125 mute, to detect the effective presence of an occupant on saidlabel 21, 22, 23, 24, 25; andseat - an effective occupation map of the
21, 22, 23, 24, 25 is established.seats
Ces étapes de procédé apparaissent particulièrement avantageuses étant donné qu'elles permettent de confirmer la présence ou pas de personnes à l'intérieur du véhicule 1. Leur mise en oeuvre permet en effet de s'affranchir de certaines ambiguïtés, comme par exemple la détection d'une occupation potentielle lorsqu'un objet humide, tel un imperméable, est placé sur un siège. Si la recherche Doppler conduit à ne détecter aucun mouvement au niveau du siège en question, ce dernier est alors considéré comme vacant. A contrario, si un écho Doppler est détecté, le système considérera à juste titre qu'une personne occupe le siège de manière effective et l'ambiguïté sera levée.These process steps appear particularly advantageous since they make it possible to confirm the presence or absence of persons inside the vehicle 1. Their implementation makes it possible to overcome certain ambiguities, such as for example the detection of a potential occupation when a wet object, such as a raincoat, is placed on a seat. If the Doppler search does not detect any movement at the seat in question, it is considered vacant. On the other hand, if a Doppler echo is detected, the system will rightly consider that a person occupies the seat effectively and the ambiguity will be removed.
Selon une autre particularité de l'invention, lorsque le véhicule 1 est équipé d'Air Bags et renferme au moins un siège auxiliaire 26 installé de façon amovible sur un siège 22 dudit véhicule 1, le procédé d'utilisation peut comporter en outre une étape selon laquelle :
- on localise chaque siège auxiliaire 26 ;
- on détermine l'orientation de chaque siège auxiliaire 26 ; et
- on commande la désactivation de tout Air Bag dont l'éventuel déploiement serait incompatible avec la présence et l'orientation de chaque siège auxiliaire 26.
- each
auxiliary seat 26 is located; - the orientation of each
auxiliary seat 26 is determined; and - it controls the deactivation of any Air Bag whose possible deployment would be incompatible with the presence and orientation of each
auxiliary seat 26.
C'est précisément le cas avec l'exemple de la
Selon une autre particularité de l'invention, lorsque chaque siège 21, 22, 23, 24, 25 du véhicule 1 est équipé d'une ceinture de sécurité ainsi que de moyens de détection du bouclage de ladite ceinture de sécurité, le procédé de détection peut comporter en outre une étape selon laquelle on génère une alarme lors du démarrage du véhicule 1 dès lors qu'au moins un siège 21, 22, 23, 24, 25 est occupé sans que la ceinture de sécurité correspondante soit bouclée.According to another feature of the invention, when each
Il est important de préciser, qu'en théorie, cette étape du procédé peut être mise en oeuvre indifféremment après avoir établi la cartographie d'occupation potentielle des sièges, ou après avoir établi la cartographie d'occupation effective de ces derniers.It is important to specify that, in theory, this stage of the process can be implemented indifferently after having established the mapping of the potential occupation of the seats, or after having established the map of effective occupation of the latter.
Selon une autre particularité de l'invention, le procédé de détection peut comporter en outre les étapes selon lesquelles :
- on détecte la fermeture de chaque ouvrant 11, 12, 13, 14 ainsi que l'ouverture du circuit électrique du véhicule 1, en d'autres termes la mise en stationnement dudit véhicule 1 ;
- on active le lecteur 110, 210 en mode Doppler pour détecter l'éventuelle présence d'un occupant à l'intérieur de l'habitacle ; et
- on déclenche une alarme si au moins un occupant est détecté.
- detecting the closing of each
11, 12, 13, 14 and the opening of the electric circuit of the vehicle 1, in other words the parking of said vehicle 1;opening - the
110, 210 is activated in Doppler mode to detect the possible presence of an occupant inside the passenger compartment; andreader - an alarm is triggered if at least one occupant is detected.
On a vu, dans la présente description, que différentes étapes du procédé d'utilisation conduisaient au déclenchement d'une alarme. Cette dernière peut être de nature quelconque et notamment de type sonore, et/ou visuelle, et/ou vibratoire.It has been seen in the present description that different steps of the method of use led to the triggering of an alarm. The latter may be of any type and in particular of sound type, and / or visual, and / or vibratory.
Claims (12)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0953346A FR2945887B1 (en) | 2009-05-19 | 2009-05-19 | SYSTEM FOR DETECTING PEOPLE WITHIN A VEHICLE OF A VEHICLE PARTICULARLY OF A MOTOR VEHICLE TYPE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2254099A1 true EP2254099A1 (en) | 2010-11-24 |
EP2254099B1 EP2254099B1 (en) | 2012-02-08 |
Family
ID=41491670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10161791A Not-in-force EP2254099B1 (en) | 2009-05-19 | 2010-05-03 | System for detecting persons inside a passenger compartment of a vehicle, in particular an automobile |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2254099B1 (en) |
AT (1) | ATE545121T1 (en) |
ES (1) | ES2377873T3 (en) |
FR (1) | FR2945887B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2624221A1 (en) * | 2012-02-03 | 2013-08-07 | ADM Concept | Safety kit for a motor vehicle to be shared by a plurality of users and system for managing the operation of a vehicle provided with such a kit |
FR3090520A1 (en) * | 2018-12-19 | 2020-06-26 | Psa Automobiles Sa | System for detecting the presence of a person occupying a rear seat of a vehicle |
Citations (4)
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US5790031A (en) * | 1997-01-13 | 1998-08-04 | Trw Inc. | Apparatus and method for sensing a rearward facing child seat with error detection |
US20060139159A1 (en) * | 2004-12-10 | 2006-06-29 | International Business Machines Corporation | Wireless system to detect presence of child in a baby car seat |
US20070096891A1 (en) * | 2005-10-17 | 2007-05-03 | Sheriff Michael L | RFID buckle closure and presence sensor system for safety childseat |
US20090046538A1 (en) * | 1995-06-07 | 2009-02-19 | Automotive Technologies International, Inc. | Apparatus and method for Determining Presence of Objects in a Vehicle |
-
2009
- 2009-05-19 FR FR0953346A patent/FR2945887B1/en not_active Expired - Fee Related
-
2010
- 2010-05-03 ES ES10161791T patent/ES2377873T3/en active Active
- 2010-05-03 AT AT10161791T patent/ATE545121T1/en active
- 2010-05-03 EP EP10161791A patent/EP2254099B1/en not_active Not-in-force
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US20090046538A1 (en) * | 1995-06-07 | 2009-02-19 | Automotive Technologies International, Inc. | Apparatus and method for Determining Presence of Objects in a Vehicle |
US5790031A (en) * | 1997-01-13 | 1998-08-04 | Trw Inc. | Apparatus and method for sensing a rearward facing child seat with error detection |
US20060139159A1 (en) * | 2004-12-10 | 2006-06-29 | International Business Machines Corporation | Wireless system to detect presence of child in a baby car seat |
US20070096891A1 (en) * | 2005-10-17 | 2007-05-03 | Sheriff Michael L | RFID buckle closure and presence sensor system for safety childseat |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2624221A1 (en) * | 2012-02-03 | 2013-08-07 | ADM Concept | Safety kit for a motor vehicle to be shared by a plurality of users and system for managing the operation of a vehicle provided with such a kit |
FR2986478A1 (en) * | 2012-02-03 | 2013-08-09 | Adm Concept | SAFETY KIT FOR A MOTOR VEHICLE TO BE SHARED BY SEVERAL USERS AND SYSTEM FOR MANAGING THE OPERATION OF A VEHICLE EQUIPPED WITH SUCH A KIT |
FR3090520A1 (en) * | 2018-12-19 | 2020-06-26 | Psa Automobiles Sa | System for detecting the presence of a person occupying a rear seat of a vehicle |
Also Published As
Publication number | Publication date |
---|---|
EP2254099B1 (en) | 2012-02-08 |
FR2945887A1 (en) | 2010-11-26 |
FR2945887B1 (en) | 2011-05-20 |
ES2377873T3 (en) | 2012-04-02 |
ATE545121T1 (en) | 2012-02-15 |
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