EP2727099A1 - Système avertisseur de situations dangereuses en milieu agressif - Google Patents
Système avertisseur de situations dangereuses en milieu agressifInfo
- Publication number
- EP2727099A1 EP2727099A1 EP12737725.7A EP12737725A EP2727099A1 EP 2727099 A1 EP2727099 A1 EP 2727099A1 EP 12737725 A EP12737725 A EP 12737725A EP 2727099 A1 EP2727099 A1 EP 2727099A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- beacon
- badge
- magnetic detection
- detection wave
- wave
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
- G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
-
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
Definitions
- the present invention relates to a warning system of dangerous situations in an aggressive environment.
- Hazardous situations include the risk of a collision between a pedestrian and a vehicle.
- a medium is considered aggressive when it introduces disturbances that prevent the correct operation of the warning system, particularly in radio wave transmissions.
- This state of the art entails at least a first problem in that the badge being an electronic object portable, is energy consumer.
- radio frequency collision avoidance systems Another problem with radio frequency collision avoidance systems is in industrial warehouses and workshops or the like. Indeed, these partially or completely covered places are generally occupied by metal structures that significantly hinder the propagation of radio waves used by the beacon-badge pairs of the radio frequency collision avoidance system for presence detection.
- the detection zones constituted by the zones in which a detection of a badge by a beacon is correct can be reduced and deformed, and this in a non-constant manner neither in time nor during the movement of the vehicle in the workshop or warehouse.
- the present invention provides a remedy for these disadvantages of the state of the art. Indeed, it relates to a warning system of dangerous situations in an aggressive environment, comprising at least one tag and at least one badge carried by two vectors presenting a danger for each other.
- the beacon includes means for transmitting a magnetic detection wave and the badge comprises means for receiving the magnetic detection wave radiated by the beacon.
- the initialization of the warning system is executed using a magnetic wave and not an electromagnetic wave, as is the case in many data communication techniques.
- the warning system operates for all of its initialization phase in near-field radiation with a working distance substantially corresponding to the wavelength of the magnetic wave in the surrounding medium.
- the means for transmitting a magnetic detection wave operates at low frequency, between 25 and 150 KHz, and preferably between 50 KHz and 125 KHz, and it comprises a self-oscillator sized to produce an operating area.
- safe including any emission diagram adapted to disturbances of the aggressive medium.
- the means for transmitting a magnetic detection wave comprise a generator of a message comprising an identifier of the beacon so that the transmitting means produces a magnetic wave encoded by said message comprising an identifier of the tag.
- the means for transmitting a magnetic detection wave comprise a magnetic antenna comprising at least one conductive turn which is configured to produce a determined zone of magnetic detection around said beacon.
- the badge also comprises warning means activated by the means for receiving the magnetic detection wave radiated by the beacon and which comprise separately or in combination from one to three effectors:
- a visual effector such as a light emitting diode
- a kinesthetic effector such as a vibrator acoustically coupled with an external wall of the badge housing.
- the badge comprises means for transmitting an automatic acknowledgment in a very high frequency wave, activated by the means for receiving the magnetic detection wave radiated by the beacon and the beacon comprises a reception means of the automatic acknowledgment in very high frequency wave transmitted by the badge, said means for receiving the acknowledgment in very high frequency wave activating a warning means of dangerous situations.
- the badge comprises a power supply connected to the electrical circuits of the badge under the control of a wake-up circuit of the power supply, activated by the means for receiving the low frequency magnetic detection wave.
- the means for receiving the magnetic detection wave radiated by the beacon comprises from one to three planar antennas whose normal directions are arranged in the directions of a trihedron, so that the orientation of the badge is indifferent in the field of the magnetic detection wave radiated by the beacon.
- the means for transmitting a magnetic detection wave of the beacon comprises a generator of message frames according to a predetermined protocol and the message comprising at least one identifier of the tag.
- the frame generator produces a frame followed by a silence time to leave the channel to other means of transmitting a magnetic detection wave and to receive an automatic acknowledgment response from least one badge disposed in the determined area of magnetic detection around the beacon.
- the tag also comprises:
- a means for detecting a UHF channel tap request which includes a circuit for detecting the start of a period
- At least one tag comprises all or part of the resources of a badge.
- At least one badge comprises all or part of the resources of a beacon.
- the system comprises at least one beacon arranged at a determined location to generate an inhibition zone delimited by the determined magnetic detection zone around the inhibition beacon, the inhibition beacon being provided with a determined and known identifier of the tags and / or badges of the system so that at least one badge receiving the magnetic detection wave from the muting beacon and recognizing the identifier of the muting beacon includes means for generating at least one of the following commands:
- each beacon is mounted on at least one mobile so as to detect collision situations when the mobiles enter a zone common to the determined zones of magnetic detection around each beacon mounted on a mobile, each beacon comprising at least means for receiving the magnetic detection wave emitted by another beacon mounted on a vehicle, and means for generating an automatic acknowledgment at very high frequency (UHF) wave.
- UHF very high frequency
- At least one beacon comprises a group of several planar antennas for receiving the magnetic detection wave arranged so that their normal directions are uniformly distributed in the plane of movement of the mobile on which the beacon is mounted.
- beacons are mounted on vectors comprising in particular:
- a beacon is arranged on a fixed point, such as a reference point to form a characteristic zone covered by the zone of action of the magnetic detection wave BF generated by the beacon, such as a radiography installation.
- X-rays and staff are provided with badges so as to warn both personnel entering the area covered by the beacon and personnel serving the industrial radiography installation of a hazardous situation.
- At least one badge is carried by vectors such as robots, or packaging pallets on a conveyor line.
- Figure 1 shows a diagram of use of a basic system of the invention
- FIGS. 2a and 2b respectively represent a block diagram of a coded magnetic field generator according to the invention and a particular embodiment of a block of this generator used in a beacon according to the invention;
- Figure 3 shows a block diagram of an embodiment of a badge according to the invention
- Figure 4 shows a block diagram of an embodiment of a beacon installed on a vehicle or industrial truck according to the invention
- Figure 5 is a diagram explaining the operation of the principle of the invention.
- Figure 6 shows a diagram of a transmission protocol of a magnetic wave
- Figure 7 shows an embodiment of a collision prevention inhibition zone
- Figure 8 shows a situation diagram of an application to collision prevention between at least two vehicles.
- Figure 9 shows a timing of dialogue between a beacon and a plurality of badges for warning system according to the invention.
- FIG 1 there is shown a diagram of use of a warning system of dangerous situations in an aggressive environment in one embodiment of the invention.
- a handling vehicle 1 moves along the vertical arrow in thick lines to the drawing in a workshop with structures 19 and 21 such as reinforced concrete walls, steel beams or other elements which both prevent the driver of the vehicle 1 to see the approach of a pedestrian carrying a badge 11 and disrupt the known radio frequency systems.
- the pedestrian carrying the badge 11 moves along the horizontal arrow in thick lines in the drawing, so that there is a risk that the vehicle and the pedestrian open at the same time out of the alley provided in the workshop between the structures 19 and 21. There is a risk of collision and a deadly danger to the pedestrian.
- the vectors presenting a danger for each other are: the vehicle 1 which carries a tag 3-9 supplied with electrical energy and at least one pedestrian who carries a badge 11.
- the beacon comprises a transmitter 7 a magnetic detection wave coupled to a magnetic energy transmitting member 9.
- the magnetic energy emitting member 9 is formed by an inductive antenna comprising a conductive frame traversed by an electric current delivered by the transmitter 7 of a magnetic detection wave.
- the magnetic energy transmitting member 9 operates in a low frequency frequency band BF.
- the low frequency magnetic detection wave BF is then radiated according to the broken arrow (1) to the badge 11 carried by the pedestrian running along the path between the structures 19 and 21.
- the badge comprises a suitable low frequency antenna 13 connected to a low frequency magnetic detection wave receiver BF 15.
- the warning system of the invention is completely realized by adding only in the badge carried by the pedestrian danger warning means which can be polarized or energized by the energy of receiving the badge or by an accumulator of electrical energy. These warning means and the power supply if necessary are described below.
- the energy radiated by the magnetic detection wave emitting member 9 of the beacon 3-9 installed on the vehicle 1 is sufficient to bias the circuits of the radio wave receiver.
- BF detection 15. Once activated, the BF magnetic detection wave receiver 15 is connected to an activation input of a very high frequency radiofrequency transmitter 17 of the UHF band which is coupled to a transmission antenna. a UHF detection or automatic acknowledgment response wave.
- the UHF detection response wave is radiated (broken arrow (3)) to the on-board vehicle 3-9 tag 1.
- the on-board beacon comprises a UHF receiving antenna 5 which is connected to a wave receiver 5 UHF detection response.
- the UHF detection response wave receiver 5 is coupled to a warning device 3 of hazardous situations which then signals the less to the driver of the vehicle of the occurrence of a dangerous situation, here a risk of collision with an invisible pedestrian wearing a badge according to the invention.
- the antenna of the means or device for transmitting a magnetic detection wave and the electrical transmission circuits are configured to generate a determined zone of magnetic detection around said beacon in which badges provided with means Receivers of the magnetic detection wave can be awakened or activated by the emission of the magnetic detection wave even in the absence of power supply of the badge.
- the warning device 3 comprises a human-machine interface, intended in particular for the driver of the vehicle on which the beacon is mounted.
- the human-machine interface is made by computer means with at least one screen for displaying texts and / or pictograms under the control of a computer programmed to activate the display screen with at least one text and / or or at least one pictogram according to the dangerous situation detected by the automatic acknowledgment issued by at least one badge.
- the human-machine interface also includes, where appropriate, a sound resource comprising a loudspeaker for broadcasting an audible warning message.
- the receiver 17 of the magnetic detection wave BF comprises a circuit for decoding the magnetic detection wave issuing (1) from the beacon embedded on the vehicle.
- the circuit for decoding the magnetic detection wave BF is directly polarized by the energy radiated and received by the antenna 13, so that, when the decoding succeeds, an output terminal of the circuit for decoding the magnetic detection wave BF switches to an active electrical potential that closes a switching circuit as a switch (not shown) which connects the rest of the electrical circuits of the badge 11 to a source of electrical energy such as an electric battery (not shown) inserted into the badge 11.
- the radiofrequency transmitter 17 of the UHF band carried by the badge also comprises a memory register in which is recorded in a known manner during the manufacture or validation of the badge 11. code which makes it possible to locate the UHF response of the badge carried by the pedestrian in the radiofrequency environment.
- the registration code serves as a modulation message to the radio frequency transmitter 17 of the UHF band and is transmitted by the UHF wave (3) to the UHF detection response wave receiver 5 of the onboard beacon.
- the UHF detection response wave receiver 5 can thus decode the registration code by means of a demodulation circuit (not shown) and distinguish the signal received from interfering signals so as to activate or not by a terminal.
- UHF detecting response wave receiver 5 suitable output of the hazardous situation 3 only when at least one badge 11 has responded to the transmitted BF detection wave.
- the badge 11 is itself equipped with warning means (not shown) which are coupled to the output terminal of the receiver of the transmitted detection wave BF.
- warning means comprise separately or in combination from one to three effectors for which the pedestrian is sensitive:
- an effector sound like a miniature speaker a visual effector comprising a light emitting diode
- a kinesthetic effector such as a vibrator acoustically coupled to an outer wall of the badge casing 11.
- Each effector is connected to the power supply integrated in the badge 11, such as an accumulator or an electric battery, with its own switching circuit, a control terminal of which is connected to the output terminal of the BF detection wave receiver 15. so that upon receipt of the detection wave BF (1), the effector is activated so as to warn the badge wearer 11.
- the danger warning means of the badge are polarized directly. by the energy received by the means for receiving the magnetic wave of the badge.
- the tag 3-9 on board the handling vehicle 1 is equipped with a warning device 3 of dangerous situations, which mainly comprises a buzzer comprising a loudspeaker and a warning light comprising at least one light emitting diode.
- the audible and light horns are activated via a switching circuit having a control terminal connected to the output terminal of the UHF detection response wave receiver so that the UHF response (3) of at least one pedestrian badge activates the warning device, signaling at least to the driver of the vehicle 1 of the occurrence of a dangerous situation, here a risk of collision with a badge wearer such as badge 11.
- a switching circuit of the on-board tag 3-9 on board the handling vehicle is coupled to a vehicle signaling member such as a vehicle horn and / or a lighting headlight so that this signaling member the vehicle cooperates or acts as a warning device for dangerous situations.
- a vehicle signaling member such as a vehicle horn and / or a lighting headlight
- the beacon receives an identifier so that the detection wave BF is modulated by the characteristic identifier of the beacon and / or the vehicle on which it is mounted.
- the beacon comprises a magnetic field generator coded by the identifier of the beacon.
- the coded magnetic field generator mainly comprises a frame generator 30 according to a predetermined communication protocol, each frame transmitted by the frame generator comprising the repetition of the identifier which serves as a modulation message.
- the signal from the frame generator 30 is placed at the modulation input 36 of a self-oscillator 32, the carrier of which is chosen in a frequency band comprised between 25 and 150 KHz and preferably between 50 and 125 KHz in an application. for detecting collision situations between a self-propelled vehicle and a pedestrian carrying badges.
- the self-oscillator has the property of having its resonance frequency established by construction shifted towards the highest frequencies or the lowest frequencies, notably as a function of the parasitic impedance applied to the emission antenna by the environment.
- This parasitic impedance can be caused by the moisture content of the propagation medium, its temperature and especially by the magnetic susceptibility of the surrounding structures such as those 19 and 21 (see Figure 1) which surround the zone of propagation of the radiated magnetic energy by an inductive antenna 34 connected to the output terminal of the auto-oscillator.
- FIG. 2b there is shown a particular embodiment of a self-oscillator according to the invention.
- the modulation input terminal 36 transmits the message frames comprising the repetition of the identifier of the beacon and / or the vehicle to a first input of an operational amplifier 33 mounted as a negative gain amplifier, preferably having a gain equal to the value "-1".
- the output of the amplifier 33 is connected to the gates of a pair of complementary MOS transistors which charge by their common terminal a magnetic antenna composed by an inductive frame 37 whose other terminal is connected to the electrical ground "V-" of the encoded magnetic field generator via a capacitor 38.
- the resonant frequency of the auto-oscillator is chosen in particular on the basis of the impedance of the magnetic antenna and the capacitance of the capacitor 38 when the design of the beacon and / or adaptation during its mounting on the vehicle.
- the self-oscillator finally comprises a feedback on the second input terminal of the amplifier 33 of the common point between the antenna 37 and the tuning capacitor 38.
- the pair of complementary MOS transistors is biased between the positive power supply. "V +" and the "V-" electrical ground of the encoded magnetic field generator.
- FIG. 3 there is shown a block diagram of an embodiment of a badge according to the invention.
- At least one magnetic antenna 40 is disposed inside the badge.
- such an antenna is constituted by at least one plane turn of a conductor or by a stack of plane turns having all the same normal direction. These turns may be associated according to different electrical assemblies depending on the circumstances of use of the badge of the invention.
- three magnetic antennas like the one described above are coupled together and their normal directions are distributed along a trihedron in the space so that the orientation of the badge in which the three antennas are mounted becomes indifferent.
- the coupling of the antennas is performed by an electrical combiner 42 whose output is connected to the input of a band pass filter on the low frequency band BF in which the tag to which the badge is associated works.
- a band BF is between 25 and 150 KHz and preferably between 50 and 125 KHz.
- the output of the bandpass filter 43 is transmitted to the input of a demodulator 44 of the low frequency detection wave BF emitted by the coded magnetic field generator of the beacon (see FIGS. 1 and 2).
- the BF demodulator 44 is constructed according to the coded magnetic field generator of the beacon to which the badge is associated.
- An output of the bandpass filter 43 is transmitted to a comparator 45 whose other input is connected to a reference voltage generator which can be programmed during the configuration of the badge or adaptively controlled so as to adjust the sensitivity of the alarm clock.
- the badge according to the reception conditions present where the badge and / or the beacon of the low frequency detection magnetic wave BF are located.
- the output of the bandpass filter 43 used for the detection of badge awakening is chosen on a point in the electric circuit of the filter 43 which reaches sufficient voltage levels at as early a time as possible during the detection of the magnetic waves picked up by the antennae 40 of the badge.
- the main output of the bandpass filter 43 is then transmitted to a demodulator 44 which extracts the message bits transmitted by the beacon to all the badges present in the transmission zone of the beacon.
- the beacon executes on the low frequency magnetic channel an ASK type modulation.
- the demodulator 44 of the badge is thus a modulation demodulator ASK type.
- Good results have been obtained with OOK modulation, which is a variant of ASK modulation and with NRZ type modulation.
- the badge demodulator is then selected as OOK or NRZ modulator depending on the circumstance.
- OOK modulation in the 25 KHz - 150 KHz band of BF transmission it has been possible to transmit bit rates of 500 bits / second to 1000 bits / second according to the aggressiveness of the medium in which the link is established. Magnetic Low Frequency.
- the output of the demodulator 44 which comprises the decoded data received from the message transmitted by the beacon in the magnetic detection wave BF, is transmitted to the input of a generator 46 providing automatic acknowledgment of the BF detection performed by the wave BF low frequency detection emitted ((1) Figure 1) by the beacon.
- the acknowledgment message is generated on the basis of the message decoded by the demodulator 44.
- the set of decoded data also constitutes an activation signal for the alarm means or danger warning devices carried by the badge, so that the wearer of the badge is notified of the presence of a device. beacon and / or vehicle or other beacon vector. These warning means are directly powered by the internal power supply of the badge, woken up or activated by the wake-up circuit 54.
- the automatic detection acknowledgment generator 46 produces an acknowledgment message on its output terminal which is connected to an input terminal of a very high frequency modulator in the UHF regulatory band.
- the automatic detection acknowledgment generator comprises means (not shown in FIG. 3) for synchronizing the protocol of frames transmitted in the low frequency band BF by the coded magnetic field generator so that the acknowledgment response in FIG. the UHF regulatory band is synchronized as will be described later.
- the request for synchronization of the automatic acknowledgment generator 46 of the detection is transmitted at least to a UHF receiver means for giving a synchronization control of the UHF frames produced by the acknowledgment generator 46.
- the UHF receiver means In one embodiment of the invention, synchronization is implemented in a UHF transceiver of the beacon to which the badge is intended to be associated. It receives the badge synchronization request and, in response, generates a UHF frame synchronization command for the requestor badge based on the frame generation performed by the coded frame generator 30 of the encoded magnetic field generator (FIG. 2). . This UHF frame synchronization command is then transmitted to the requestor badge which a UHF receiver (not shown) can receive the synchronization command.
- the detection automatic acknowledgment message generator 46 is connected to the input terminal of a very high frequency modulator 48 in the UHF regulatory band which controls a UHF antenna 50 of the badge (11 Figure 1).
- the UHF modulator 48 is based on a commercial circuit.
- an output of the broadband low frequency demodulator 44 of the badge is also connected to a wake-up circuit 54 of the power supply 52 of the remainder of the electrical circuits 46, 48 of the badge.
- a circuit 54 is, in one embodiment, realized by a switching circuit which connects the power supply terminals of the electrical circuits 46, 48 of the badge to a power supply 52 comprising an electric battery. After a period of inactivity on the output of the demodulator 44, the wake-up circuit 54 returns to the idle state and the power supply 52 is again disconnected from its load. This achieves a significant reduction in power consumption at the badge level.
- warning means integrated badge comprise from one to three effectors taken from a loudspeaker, a display and a vibrator. Each of them is controlled, if necessary, by means of a switching circuit whose control input is connected to the output terminal of the broadband demodulator BF 44 and / or by programming, and / or connected at the same time. the configuration of the badge when it is put into service. When the switching circuit is closed, the current of the power supply 52 of the badge (accumulator, battery) passes through the controlled alarm means. In another embodiment, it is directly the energy of receiving the magnetic detection wave received by the badge which serves to bias the warning means.
- FIG 4 there is shown schematically a beacon installed on a handling vehicle in an embodiment according to the invention.
- the chassis 60 of the vehicle comprises a substantially vertical wall on the outside of which is disposed a magnetic antenna 78 composed by a multi-turn frame 76 enclosed in an insulating sheath 74.
- the magnetic antenna 78 is connected by a sheathed electrical cable 71 to a box 62 in which is installed the tag itself, as described in particular in Figures 1 and 2a.
- the electrical cable 71 is connected to the box 62 of the beacon by a sealed passage through the substantially vertical wall of the frame 60 of the vehicle. It is connected to the self-oscillator 32 ( Figure 2) of the coded magnetic field generator of the beacon.
- the selfie antenna 78 is mounted on brackets 72, 73 distributed on bases integral with the substantially vertical wall of the frame 60, around the windshield 70 mounted on this wall.
- Each bracket such as the bracket 71 has a free end carrying a cylindrical support 72 which passes around the cable 74 constituting the frame forming the antenna.
- the cable 74 is composed of several strands such as the strand 76, each forming a turn of the self-induction antenna 78.
- the turns can be connected in a multitude of electrical connection diagrams with the output of the self-oscillator (32, FIG. 2) so as to conform the radiation pattern of the antenna 78 when mounted on the frame 60 of the vehicle.
- Diagram 80 represents the safe operating area of the auto-oscillator ( Figures 2a and 2b) of the encoded magnetic field generator.
- Diagram 82 shows the free-field radiated power diagram with the self-oscillator of the invention and the diagram 84, the power diagram radiated in an aggressive environment, as in the workshop with metal structures (19, 21). : Figure 1).
- FIG 6 there is shown a diagram of a magnetic wave generation protocol used in the encoded frame generator (30, Figure 2a).
- the time for placing a coded message according to the protocol chosen is determined during a fraction of period P # 1 marked by the zone 91 for the first frame # 1.
- a silence time is provided for a period 91 and a second frame # 2 can then be transmitted.
- N frames from # 1 to #N can be generated, so that up to N tags can compete in the same reception area.
- a warning inhibit beacon 100 which generates a magnetic detection wave BF as has been taught with reference to Figs. 1 to 2b and 6.
- badges 99 When badges 99 are in the area 102 covered by the magnetic detection wave BF generated by the beacon 100, they detect the identifier of the inhibition beacon.
- a memory register installed in each badge is loaded with the list of the identification of the inhibition tags.
- the badge When decoding the tag identifier which is loaded into the message modulating the magnetic detection wave BF, the badge comprises means for comparing the identifier received by the receiver BF with the list recorded in the register of tag identifiers. inhibition.
- the means for comparing the decoded identifier with the list of inhibit tags may produce at least one of the following orders:
- each badge has:
- a switching circuit of the badge warning means said circuit being connected to a means for comparing the decoded identifier to the list of inhibition tags;
- a switching circuit for disconnecting the input terminal of the automatic acknowledgment generator (46, Figure 3) from the output terminal of the broadband demodulator BF (44, Figure 3), said circuit being connected to the means to compare the decoded identifier to the list of inhibition tags.
- the means for comparing the decoded identifier with the list of muting tags is connected to the output terminal of the broadband demodulator BF (44, Figure 3) of the badge.
- each beacon is also equipped with a broadband demodulator BF which allows it to detect a coded magnetic detection wave transmitted by another vehicle.
- the broadband BF demodulator is absolutely analogous to the demodulator 44 of the badge described with reference to FIG. 3 and the beacon also comprises an automatic acknowledgment message transmission chain similar to the chain 46-50 of the badge of the Figure 3
- the beacon of the vehicle 126 uses these means to generate a coverage area of the magnetic detection wave BF 120 in which is located the beacon of the vehicle 124 equipped with reception means BF and UHF transmission of automatic acknowledgment of a badge.
- the beacon of the vehicle 126 generates a magnetic detection wave BF 128 which is then received by the antenna (or antennas) of the magnetic tag of the vehicle 124.
- the demodulator BF of the detection wave then decodes the identifier of the beacon of the vehicle 126 in the beacon of the vehicle 124 and its active output terminal:
- warning means similar to those provided in the badge described in Figure 3 so that the driver of the vehicle 124 is warned of a risk of collision with the vehicle 126 whose path is masked by the obstacles 122 between which he circulates and
- the automatic acknowledgment UHF transmission channel of the vehicle beacon 124 then transmits the automatic acknowledgment message 130 which is then received by the reception antenna UHF of the beacon of the vehicle 126 which is decoded by the reception chain.
- the vehicle 124 also emits a magnetic detection wave to the vehicle 126 which will also respond as a badge. It should be noted that collision prevention detection takes place twice in parallel for each vehicle, which reinforces the reliability of the hazard warning system of the invention.
- the vehicle collision risk detection beacon must have a zone of action of the enhanced magnetic detection wave BF. It is then expected that the receiving antenna of the magnetic detection wave BF is different from the version described for a badge like the one defined in FIG. 3.
- the vehicle as the vehicle 124 or 126 is most of the time. time arranged in a plane and it is not necessary to provide a receiving magnetic antenna whose normal direction is directed according to the vertical of the place.
- Figure 9 shows a timing of dialogue between at least one tag and a plurality of badges for warning system according to the invention.
- the first four lines refer to a tag marked "Tag #x".
- the first line describes the transmission on the UHF channel that was previously described using Figure 2a in particular.
- the second line describes the transmission of a low frequency magnetic detection frame BF which is repeated according to the protocol described with the aid of FIG. 6.
- the third line describes the reception on the same UHF channel as that in transmission on the first line, an automatic acknowledgment wave of at least one badge awakened by the magnetic detection frame of the first line.
- the fourth line indicates the status of the alarm associated with the #x tag.
- beacons may share a common reception area for the magnetic detection wave BF.
- the tag #x as all the tags of the warning system of the invention permanently places its UHF channel in permanent listening (third line for tag #x). If it receives a UHF broadcast produced by another beacon while its own protocol execution period T is not completed, the #x beacon infers that another #y beacon is requesting the UHF transmission channel. . It blocks its possible emission of a magnetic detection wave BF. And she stays tuned UHF.
- a UHF channel take request message it itself receives this message and then triggers an interrogation (2) which controls a transmission of a magnetic detection wave BF by the tag #x, the other tags #y possible remaining dumb at least on the channel BF.
- the magnetic detection wave BF is then received (3) by the BF receivers of the badges # 1 to #n if n badges are arranged in the zone.
- the group of following triplets of lines concerns the radiofrequency activity of a group of N badges at the same time in the coverage area of the magnetic detection wave emitted by the tag "Tag #x".
- Each badge referenced from “badge # 1" to “badge #n” receives (3), in the line of Figure 9 marked “BF Reception", the same interrogation or detection frame produced by the tag "Tag #x” Almost simultaneously to his show.
- the frame is received, as described in FIG. 3, by the broadband demodulator (44, FIG. 3) of the low frequency detection wave BF emitted by the coded magnetic field generator of the tag "Tag #x".
- each badge "Badge # 1" to "Badge #n” is activated by "Answer # 1" to "Answer #n” and generates (4) the acknowledgment message on the UHF communications network from each badge "Badge # 1" to "Badge #n” to destination (5) of the transmitter or detector tag "Tag #x". Simultaneously with the UHF response, the badge # 1 to #n activates its alarm means.
- the tag #x which generated the magnetic detection wave BF then receives the responses Answer # 1 to Answer #n of the n badges present and it activates (6) its own means of alarm as described above.
- the detector tag of the badges present in its coverage area receives an arbitrary number of automatic acknowledgments. It suffices to receive a single automatic acknowledgment so that the signaling of the warning of a danger situation is triggered on the beacon.
- each beacon therefore comprises means for transmitting on the UHF channel a UHF channel take request and means for listening to the UHF channel.
- a means for detecting a UHF channel take request includes a circuit for detecting the start of a period T of the communication protocol of the warning system of the invention and a circuit for determining whether a UHF channel take request another #y tag is received outside the tap period.
- the output of the circuit for determining whether a UHF channel tap request is then connected to a control circuit for initializing the communication between the tag #x and the badges # 1 to #n possibly present in the beacon zone, so that if another UHF channel take request has been presented by another tag #y, a period of inhibition of the emission of the magnetic detection wave is initiated and if no other UHF channel take request has been presented by another tag #y, the communication is initialized by the emission of a magnetic detection wave BF.
- the warning system for dangerous situations in an aggressive environment of the present invention finds application in the prevention of collisions between any two vectors.
- the warning means that equip the badge and / or the tag can warn at least one of the vectors of a collision risk.
- the invention is also applicable in the anti-collision devices in that the warning means can be coupled as has been described in the case of a beacon mounted on a handling vehicle, the actuators of the vehicle movement like brakes that help prevent the collision.
- the beacon can, as described for the inhibition beacons ( Figure 7), be arranged on a fixed point, as a reference point to form a characteristic zone covered by the action zone of the magnetic detection wave BF generated by the beacon.
- the beacon is associated with an X-ray radiography installation making it possible to control welds or sheets in industrial tanks.
- staff who work in a tank staff who work in a tank.
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Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL12737725T PL2727099T3 (pl) | 2011-06-29 | 2012-06-26 | System ostrzegawczy o sytuacjach niebezpiecznych w środowisku agresywnym |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1155814A FR2977358B1 (fr) | 2011-06-29 | 2011-06-29 | Systeme avertisseur de situations dangereuses en milieu agressif |
PCT/EP2012/062308 WO2013000888A1 (fr) | 2011-06-29 | 2012-06-26 | Système avertisseur de situations dangereuses en milieu agressif |
Publications (2)
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EP2727099A1 true EP2727099A1 (fr) | 2014-05-07 |
EP2727099B1 EP2727099B1 (fr) | 2018-04-18 |
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EP12737725.7A Not-in-force EP2727099B1 (fr) | 2011-06-29 | 2012-06-26 | Système avertisseur de situations dangereuses en milieu agressif |
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US (1) | US9569964B2 (fr) |
EP (1) | EP2727099B1 (fr) |
CN (1) | CN103718222A (fr) |
CA (1) | CA2841159A1 (fr) |
FR (1) | FR2977358B1 (fr) |
PL (1) | PL2727099T3 (fr) |
WO (1) | WO2013000888A1 (fr) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6128413B2 (ja) * | 2012-08-24 | 2017-05-17 | パナソニックIpマネジメント株式会社 | 警報装置、端末装置、警報システム、警報出力方法、通知方法 |
US9761143B2 (en) * | 2014-09-12 | 2017-09-12 | Strata Safety Products, Llc | Proximity detection system with approach zone |
CN104535968B (zh) * | 2015-01-15 | 2017-04-26 | 上海中远船务工程有限公司 | 在海洋工程船舶上应用的超高频信号全船覆盖方法 |
US9445396B1 (en) | 2015-03-13 | 2016-09-13 | Toshiba Global Commerce Solutions Holdings Corporation | Signage acknowledgement tied to personal computer device |
US9705570B2 (en) * | 2015-08-12 | 2017-07-11 | Honeywell International Inc. | Updating gas detector configuration using near field communication tags |
JP6401679B2 (ja) * | 2015-08-26 | 2018-10-10 | 日本電信電話株式会社 | 衝突回避システムおよび回避装置 |
CN105303864A (zh) * | 2015-10-27 | 2016-02-03 | 重庆智韬信息技术中心 | 利用路侧中继实现车辆安全驾驶的智能管理方法 |
CN109073739B (zh) * | 2016-04-05 | 2023-09-12 | 萨罗尼科斯贸易与服务一人有限公司 | 用于降低碰撞危险的设备和方法 |
US20170337826A1 (en) * | 2016-05-23 | 2017-11-23 | Intel Corporation | Flight Management and Control for Unmanned Aerial Vehicles |
CN107009373A (zh) * | 2017-04-06 | 2017-08-04 | 南京三宝弘正视觉科技有限公司 | 一种独居者监控机器人和系统 |
DE102018104992A1 (de) * | 2018-03-05 | 2019-09-05 | Jungheinrich Ag | Verfahren und System zur Kollisionsvermeidung in einem Gefahrenbereich einer Warenlogistikeinrichtung |
EP3584949B1 (fr) * | 2018-06-19 | 2022-01-19 | STMicroelectronics razvoj polprevodnikov d.o.o. | Procédé pour limiter le niveau d'un signal modulé reçu par une étiquette et limiteur correspondant |
CN112513957A (zh) * | 2018-07-23 | 2021-03-16 | 纽瑞科斯控股公司 | 用于在情境感知环境中确认存在的方法和系统 |
CN109118829A (zh) * | 2018-09-10 | 2019-01-01 | 北京航空航天大学东营研究院 | 一种机场人员动态监控方法及系统 |
CN111862653A (zh) * | 2020-07-31 | 2020-10-30 | 广州小鹏汽车科技有限公司 | 一种警告方法和装置、以及一种车辆 |
CN112601272B (zh) * | 2020-12-08 | 2023-06-06 | 上海金智晟东电力科技有限公司 | 一种物联网智能感知终端无线电唤醒的实现方法 |
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DE3643236A1 (de) | 1986-12-18 | 1988-07-07 | Ruhrkohle Ag | Personenschutzfunkgeraet |
US5995898A (en) | 1996-12-06 | 1999-11-30 | Micron Communication, Inc. | RFID system in communication with vehicle on-board computer |
DE19803345C2 (de) | 1998-01-29 | 2002-11-07 | Opel Adam Ag | Warnsystem in Kraftfahrzeugen |
US7118037B2 (en) | 2004-09-16 | 2006-10-10 | International Business Machines Corporation | Radio frequency identification (RFID) household system for tracking and managing RFID tag containing household possessions within short range RF limited boundaries of a household facility |
WO2006070462A1 (fr) | 2004-12-28 | 2006-07-06 | Fujitsu Limited | Dispositif, procede et programme d'extraction des etiquettes |
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CN101371282A (zh) * | 2006-01-03 | 2009-02-18 | 希-迈网络公司 | 防止转弯的机动车引发事故的方法 |
WO2007149169A2 (fr) | 2006-05-17 | 2007-12-27 | 24Eight Llc | Système et procédé d'évitement de collision humaine |
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DE102007045742A1 (de) | 2007-07-06 | 2009-01-08 | Siemens Ag | System und Verfahren zur Positionsbestimmung in einer umbauten Umgebung |
US8232888B2 (en) * | 2007-10-25 | 2012-07-31 | Strata Proximity Systems, Llc | Interactive magnetic marker field for safety systems and complex proximity warning system |
CA2617976A1 (fr) * | 2008-01-11 | 2009-07-11 | John Dasilva | Systeme de securite du personnel faisant appel a des frequences a variation temporelle |
US8922431B2 (en) * | 2010-04-13 | 2014-12-30 | Becker Research And Development (Proprietary) Limited | Apparatus, a system and a method for collission avoidance |
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2011
- 2011-06-29 FR FR1155814A patent/FR2977358B1/fr not_active Expired - Fee Related
-
2012
- 2012-06-26 CN CN201280032067.2A patent/CN103718222A/zh active Pending
- 2012-06-26 CA CA2841159A patent/CA2841159A1/fr not_active Abandoned
- 2012-06-26 PL PL12737725T patent/PL2727099T3/pl unknown
- 2012-06-26 EP EP12737725.7A patent/EP2727099B1/fr not_active Not-in-force
- 2012-06-26 WO PCT/EP2012/062308 patent/WO2013000888A1/fr active Application Filing
- 2012-06-26 US US14/129,788 patent/US9569964B2/en not_active Expired - Fee Related
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US20060132352A1 (en) | 2004-12-21 | 2006-06-22 | Q-Track, Inc. | Near field location system and method |
US20090280742A1 (en) | 2008-02-25 | 2009-11-12 | Q-Track Corporation | Multiple Phase State Near-Field Electromagnetic System And Method For Communication And Location |
WO2011141552A1 (fr) | 2010-05-12 | 2011-11-17 | P.S.T | Procédé et dispositif de signalisation d'un obstacle potentiel, tel qu'un piéton, à destination d'un conducteur de véhicule, notamment d'un conducteur d'engin |
Non-Patent Citations (1)
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See also references of WO2013000888A1 |
Also Published As
Publication number | Publication date |
---|---|
EP2727099B1 (fr) | 2018-04-18 |
PL2727099T3 (pl) | 2018-10-31 |
CA2841159A1 (fr) | 2013-01-03 |
FR2977358B1 (fr) | 2013-08-09 |
CN103718222A (zh) | 2014-04-09 |
US20140139356A1 (en) | 2014-05-22 |
FR2977358A1 (fr) | 2013-01-04 |
WO2013000888A1 (fr) | 2013-01-03 |
US9569964B2 (en) | 2017-02-14 |
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