Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
  • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
  • G01S19/13—Receivers
  • G01S19/35—Constructional details or hardware or software details of the signal processing chain
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
  • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
  • G01S19/13—Receivers
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
  • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
  • G01S19/13—Receivers
  • G01S19/35—Constructional details or hardware or software details of the signal processing chain
  • G01S19/37—Hardware or software details of the signal processing chain
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
  • G08G5/0004—Transmission of traffic-related information to or from an aircraft
  • G08G5/0013—Transmission of traffic-related information to or from an aircraft with a ground station
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
  • G08G5/0017—Arrangements for implementing traffic-related aircraft activities, e.g. arrangements for generating, displaying, acquiring or managing traffic information
  • G08G5/0026—Arrangements for implementing traffic-related aircraft activities, e.g. arrangements for generating, displaying, acquiring or managing traffic information located on the ground
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
  • G08G5/0073—Surveillance aids
  • G08G5/0082—Surveillance aids for monitoring traffic from a ground station
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q1/00—Details of, or arrangements associated with, antennas
  • H01Q1/12—Supports; Mounting means
  • H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
  • H01Q1/1228—Supports; Mounting means for fastening a rigid aerial element on a boom
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q1/00—Details of, or arrangements associated with, antennas
  • H01Q1/48—Earthing means; Earth screens; Counterpoises

Definitions

• the present invention relates to a signal receiving station for an ADS-B surveillance system.
• the present invention relates to air traffic control implementing a cooperative surveillance system, ADS-B automatic dependent surveillance broadcast (acronym for the term "Automatic Dependent Surveillance-Broadcasf").
• ADS-B surveillance system for air traffic control is intended to develop, particularly in regions of the world that are not equipped with radar.
• the surveillance ADS-B makes it possible to know the position of the aircraft thanks to means of calculation equipping each aircraft.
• Each aircraft determines its position by means of the existing satellite positioning system of the GPS type or by an inertial unit, and then regularly sends over a radio link the position thus determined as well as other elements of information useful in the control of air traffic such as information of altitude, speed, path.
• a ground station in English "ground station” is adapted to receive and process the ADS-B signals and broadcast by each aircraft.
• EP 2 296 128 discloses an air traffic control system implementing an ADS-B surveillance system.
• ground stations are provided, preferably remote from each other.
• the ADS-B signals are received by an antenna.
• the ADS-B signal receiving antenna is omnidirectional and placed at the top of a mast (or pylon).
• the masts of the receiving stations are generally of great height, of the order of 20 to 30 m, and require to connect the antenna by a coaxial cable to the ground station located at the base of the mast.
• the attenuation of the signals transmitted by the coaxial cable is important. It can correspond to a signal-to-noise ratio of 3 dB and is harmful to the good reception of the ADS-B signals and thus to the effective range of the antenna.
• the present invention aims to improve a signal receiving station for an ADS-B surveillance system.
• the present invention relates to a signal receiving station for an ADS-B monitoring system implemented in an air traffic control.
• the receiving station comprises a housing intended to be fixed to a mast, the housing comprising an ADS-B signal receiving antenna, a GPS signal receiving antenna and an electronic reception and processing module.
• ADS-B signals and GPS signals, ADS-B signal receiving antennas and GPS signals being connected to said electronic receiving and processing module inside the housing.
• the ADS-B signal receiving antenna and the GPS signal receiving antenna are co-implanted with the ADS-B signal receiving and processing electronic module and GPS signals inside the housing for to be placed at the top of a mast.
• the receiving station thus eliminates coaxial transmission cables between each antenna and a signal receiving device placed at the base of the mast.
• each antenna to the electronic module for receiving and processing signals inside a housing avoids tedious system settings to take account of both lengths of coaxial cables and the distance separating them.
• GPS signal receiving antenna and the ADS-B signal receiving antenna avoids tedious system settings to take account of both lengths of coaxial cables and the distance separating them.
• GPS signal receiving antenna and the ADS-B signal receiving antenna avoids tedious system settings to take account of both lengths of coaxial cables and the distance separating them.
• GPS signal receiving antenna and the ADS-B signal receiving antenna The co-location of the GPS signal receiving antenna with the ADS-B signal receiving antenna in the same housing makes it possible to date each reception event of an ADS-B signal to the exact location of its reception.
• the co-location of GPS signal receiving antennas and ADS-B signals is thus particularly advantageous for the implementation of the positioning calculations of an aircraft by multilateration.
• the co-location of the antennas for receiving GPS signals and ADS-B signals and the removal of coaxial transmission cables between each antenna and the electronic reception and processing module eliminate the risk of error when setting up performing multilayer calculations from multiple signal receiving stations to determine the position of an aircraft by multilateration.
• the electronic reception and processing module comprises means of generating messages according to the ASTERIX exchange standard. 21.
• the electronic reception and processing module is incorporated in a case detachably fixed inside the housing.
• the electronic module for receiving and processing can be removed in case of failure or desired change of the electronic module.
• the case comprises two connection jacks respectively adapted to be connected to a coaxial output of the ADS-B signal receiving antenna and to a coaxial output of the GPS signal receiving antenna.
• the case preferably comprises a connector of a network cable adapted to connect the electronic reception and processing module to a remote signal processing station.
• the processing of the ADS-B signals received can be partly achieved by the electronic reception and processing module integrated in the housing with the ADS-B signal receiving antenna, and partly realized by a processing station. remote signals for their operation in the ADS-B surveillance system.
• the housing comprises two parts, a first part being intended to be fixed to a mast and a second part being removably attached to the first part, the case being accessible in the housing when this second housing part is dismounted from the first housing part.
• the first part of the housing comprises a thread adapted to cooperate with a thread mounted free to rotate on the case and fixedly mounted in translation in a longitudinal direction of the case and the first housing part.
• connection inside the casing of the case to the ADS-B signal receiving antennas and receiving GPS signals can thus be achieved by plugging the coaxial outputs of the antennas into the connection jacks of the case.
• ADS-B is mounted in the center of a ground plane embedded in the case.
• ground plane advantageously makes it possible to improve the operation and reception of the ADS-B signals by the antenna, and thus the effective range of the ADS-B signal receiving antenna.
• the GPS signal receiving antenna is fixed on the ground plane. This arrangement makes it possible to ensure reliable positioning of the antenna for receiving GPS signals relative to the ADS-B signal receiving antenna.
• the GPS signal receiving antenna is mounted at the periphery of the ground plane so as not to interfere with the homogeneity of the ground plane and disturb the reception of the ADS-B signals.
• FIG. 1 is a perspective view of a mast equipped with two signal receiving stations according to one embodiment of the invention
• FIG. 2 is a partial perspective view of a mast equipped with a signal receiving station according to one embodiment of the invention
• FIG. 3 is a partial perspective view of the signal receiving station of FIG. 2;
• FIG. 4 is a truncated perspective view of the mast equipped with a signal receiving station of FIG. 2;
• FIG. 5 is a perspective view of the enlarged detail A of FIG. 4.
• FIG. 6 is a truncated perspective view of the mast equipped with a signal receiving station of Figure 2, illustrating the change and / or the mounting of an electronic module for receiving and processing signals.
• Such a signal receiving station is to receive ADS-B signals from one or more aircraft.
• the aircraft positioning information is generated directly at the level of each aircraft, equipped with a satellite positioning system (or inertial unit).
• the aircraft calculates its own position and sends it regularly by radio.
• the signal receiving station is a passive station adapted to continuously receive the signals broadcast by the aircraft, without requiring the establishment of a dedicated connection between each aircraft and the receiving station. of signals.
• ADS-B signals are signals with a frequency of 1090 MHz, which can be transmitted by Mode S radar transponders, which are usually fitted to commercial aircraft.
• a signal receiving station mainly comprises an ADS-B signal receiving antenna intended to be positioned in height.
• the signal receiving station 10 is adapted to be fixed to the end of a mast January 1.
• the mast 1 1 can reach a height of 20 to 30 m.
• the mast 1 1 has two arms 1 1 a, 1 1 b at its upper end, respectively for mounting two identical signal receiving stations 10.
• the mounting of two signal receiving stations 10 allows operational redundancy by providing an emergency receiving station in the event of a malfunction, thus making it possible to postpone the maintenance operation on the defective signal receiving station 10.
• a signal receiving station 10 intended to be fixed at the end of a mast 11 will be described below.
• the signal receiving station 10 comprises a housing 20 intended to be fixed to the mast 11.
• the housing 20 is held by a clamping collar 12 at one end of an arm 11a, 11b of the mast 11.
• Any type of reliable and removable attachment may be suitable for mounting a housing 20 on the end of a mast January 1.
• the housing 20 comprises an ADS-B 30 signal receiving antenna.
• the ADS-B signal receiving antenna is an omnidirectional antenna, for example in the form of a metal rod of sufficient length to receive the ADS-B signals broadcast by the aircraft.
• the signal receiving antenna ADS-B is adapted to extend in a longitudinal direction Y, substantially vertical in space.
• the ADS-B signal receiving antenna 30 may have a length of between 30 and 90 cm, and for example between 50 and 60 cm.
• the ADS-B signal receiving antenna 30 is formed of three vertical strands connected by turns 31.
• the junction of the vertical strands by the turns 31 is intended to phase shift the received signal by a quarter of the wavelength to summed the ADS-B signal levels received on the vertical strands.
• the ADS-B signal receiving antenna 30 is mounted substantially in the center of a ground plane 32.
• Such a ground plane makes it possible, in known manner, to improve the reception of the signals by the ADS-B signal receiving antenna 30.
• the ground plane 32 is formed of an epoxy-copper printed circuit.
• the ADS-B signal receiving antenna 30 has at one connection end a coaxial output 33 for connecting the ADS-B signal receiving antenna 30 to an information processing system as will be described later.
• the housing 20 here mainly comprises two elongated tubular portions 21, 22 extending in the axis of one another in a longitudinal direction parallel to the longitudinal direction Y of the antenna ADS-B 30.
• An upper tubular portion 21 is adapted to house the ADS-B 30 signal receiving antenna.
• the tubular portions 21, 22 are coupled to each other by an enlarged portion 23 intended to house the ground plane 32.
• the enlarged portion 23 is formed of two disk-shaped shells, each fixed to a tubular portion 21, 22 of the casing 20.
• the tubular portions 21, 22 of the housing 20 and the enlarged portion 23 are made for example of a rigid plastic material, for example PVC, and are integral with each other in the signal receiving station 10.
• the tubular portions 21, 22 and the enlarged portion 23 thus constitute a first housing portion 20 intended to be fixed to the mast January 1.
• the attachment to the mast 1 1 is performed by the clamp 12 fixed around a lower tubular portion 22 extending under the widened portion 23 when the signal receiving station 10 is mounted on the mast 1 1.
• the signal receiving station 10 also comprises a GPS signal receiving antenna 40 as visible in FIGS. 2 and 3.
• the GPS signal receiving antenna 40 is preferably mounted at the periphery of the ground plane. 32.
• the GPS signal receiving antenna 40 is preferably disposed near the periphery of the disk.
• the GPS signal receiving antenna 40 is thus housed with the ground plane 32 in the housing 20, and here in the enlarged portion 23 of the housing 20.
• the GPS signal receiving antenna 40 has a coaxial output 41 for connecting the GPS signal receiving antenna 40 to an information processing system described hereinafter.
• the ADS-B signal receiving antenna 30 and the GPS signal receiving antenna 40 are connected to an electronic receiving and processing module 50 directly inside the housing 20.
• the electronic module 50 for receiving and processing signals ADS-B and GPS signals is integrated in the housing 20, in the signal receiving station 10 to be fixed at the top of the mast January 1.
• the electronic reception and processing module 50 is made from a printed circuit comprising all the means for acquiring, amplifying, and processing the signals received by the reception antennas of the ADS signals. B 30 and GPS 40 signals.
• the printed circuit of the electronic reception and processing module 50 can be realized on a card.
• the separation of the functionalities of the electronic reception and processing module 50 makes it possible in particular to separate the signal-receiving part, which is more sensitive to noise, from the other signal processing parts.
• Such a signal processing receiving electronic module 50 need not be described in more detail in its structure: it may be in the form of one or more printed circuit boards comprising standard components for signal processing, and in particular a microprocessor adapted to cooperate with a mass memory, of the Micro SD card type (Micro SDS) and a random access memory for storing computer software and treatment and data acquired during treatment.
• a microprocessor adapted to cooperate with a mass memory, of the Micro SD card type (Micro SDS) and a random access memory for storing computer software and treatment and data acquired during treatment.
• the electronic reception and processing module 50 is incorporated in a case 60 intended to be housed in the case 20.
• the case 60 is made from an aluminum block forming a frame housing the electronic reception and processing module 50.
• the case 60 comprises at a first end 61 two receptacles 62 intended to connect the coaxial outputs 33, 41 respectively of the ADS-B signal receiving antenna 30 and the receiving antenna. of GPS signals 40 to the electronic reception and processing module 50.
• the sockets 62 may be SMB sockets (acronym for "Sub Miniature Version B") conventionally used for the connection of coaxial cables.
• the case 60 has at a second end 63 an output socket forming a connector 64 of a network cable.
• the connector 64 may typically be an RJ 45 ("Registered Jack 45") connector used in Ethernet-type network cabling.
• the case 60 thus comprises a connector 64 adapted to connect the electronic processing receiving module 50 to a remote signal processing station (not shown).
• the case 60 is in this embodiment in the form of a substantially parallelepipedal structure elongate in the longitudinal direction Y, having the ends 61, 63 described above.
• the case 60 is intended to be detachably fastened inside the case 20.
• the electronic reception and processing module 50 can be removed from the signal receiving station 10 for its change or repair.
• the case 20 comprises a second part 24 removably attached to the first case portion 20.
• the second portion 24 is removably attached to a free end of the lower tubular portion 22 of the first housing portion 20.
• the case 60 is intended to be housed in the case 20 in the lower tubular portion 22 of the case 20.
• the case 60 when the case 60 is housed in the case 20, the case 60 extends under the ground plane 32 from which the coaxial outlets 33, 41 of the two antennas 30, 40 open.
• the second housing portion 24 has a threaded portion 24a intended to cooperate with a complementary threaded portion 22a of the lower tubular portion 22 of the housing 20.
• the complementary threaded portion 22a is located near the free end of the lower tubular portion 22, opposite the other end connected to the enlarged portion 23 of the housing 20.
• the second portion 24 of housing 20 is adapted to the tight fitting of a network cable 70 provided at its end with a connection socket 71 intended to cooperate with the connector outlet socket 64 provided at the second end 63 of the holster 60.
• the network cable 70 is mounted in a sealed manner by means of a stuffing box 72 at an orifice arranged for the passage of the network cable 70 in the second housing portion 24.
• the network cable 70 can be fixed at several points along the mast 1 1 to allow its return to the ground and the connection with a station ground (ground station) remote.
• the second housing portion 24 forms a protective cover around the connection of the network cable 70.
• the second housing portion 24 is formed of a third tubular portion 24 extending in the extension of the lower tubular portion 22.
• the housing 20 may have a length of between 60 and 100 cm in the longitudinal direction Y.
• the case 60 comprises a screw thread 66 mounted free to rotate on the case 60 and fixedly mounted in translation in the longitudinal direction Y of the case 60, corresponding to the longitudinal direction Y of the first housing part 20.
• the first part of the housing 20 has a complementary thread
• the complementary threading 22b is located on an inner wall of the lower tubular portion 22 of the housing 20.
• the case 60 can be mounted by screwing inside the lower tubular portion 22 of the casing 20. Thanks to the free rotational mounting of the screw thread 66, the screwing of the casing 60 has the effect of moving the translation of the case 60 inside the housing 20 to make the plug connection of the plugs 62 in the coaxial outlets 33, 41.
• Foolproofing means may further be provided between the case 60 and the case 20 to ensure correct positioning of the case around the longitudinal direction Y of the case 20.
• the polarizing means may be conventional and made by any type of grooves or complementary notches provided on the case 60 and the lower tubular portion 22 of the case 20.
• the case 60 comprises near the first end 61 a rib 68 intended to cooperate with a complementary groove (not shown) provided on one side internal of the housing 20, and more particularly on an inner face of the lower tubular portion 22 of the housing 20.
• a seal 67 is provided for sealing between the case 60 and the lower tubular portion 22 of the case 20.
• the lower tubular portion 22 of the housing 20 has on its inner face a shoulder 22c, beyond the complementary thread 22b.
• the seal 67 is then pressed against this shoulder 22c during screw mounting of the casing 60 in the lower tubular portion 22 of the casing 20.
• the lower tubular portion 22 of the casing 20 thus has on an internal face the complementary threading 22b, adapted to cooperate with the thread 66 of the casing 60, and the complementary threaded portion 22a disposed at the lower end end of the lower tubular portion 22 adapted to cooperate with the threaded portion 24a of the second housing portion 24.
• the screw thread 66 rotatably mounted on the case 60 comprises, in this embodiment, a first threaded portion 66a extending over the entire periphery of the case 60 and extending on a crenelated portion 66b allowing manual screwing.
• the crenellated portion 66b includes, without limitation, four slots 66b carrying the thread of the thread 66 and adapted to cooperate with the complementary thread 22b provided in the first housing portion 20.
• the four slots 66b are arranged symmetrically on the periphery of the case 60.
• the second housing portion 24 has notches 24b retractably mounted at one end of the second portion 24 of the housing 20 to be removably attached to the first portion of the housing 20.
• Any type of mechanism for mounting in the retracted position of the notches 24b, until an operator acts on the mechanism for position the projections 24b projecting, can be used to equip the second portion 24 of housing 20 retractable notches 24b.
• the second housing portion 24 has four retractable notches 24b.
• the retractable notches 24b can occupy a retracted position in the second housing portion 24, or a projecting position as illustrated in FIG. 6, extending beyond the complementary threaded portion 24a of the second portion 24 of the housing 20.
• the retractable notches 24b are intended to cooperate with the slots 66b of the case 60 in order to exert a force in the unscrewing direction for the disassembly of the case 60, in particular when the seal 67 is bonded.
• the operator first unscrews the gland 72 of the second housing portion 24 to release the cable 70 and the second portion 24 of the housing 20 is unscrewed from the lower tubular portion 22 of the housing 20.
• connection of the cable 70 at the connector 64 is thus apparent, the second portion 24 of the housing 20 being able to slide along the cable 70.
• the retractable notches 24b are, if necessary, protruded to cooperate with the slots 66b and facilitate the unscrewing of the case 60 by exerting a force in rotation on the thread 66.
• the end of the extraction of the case 60 can then be performed by unscrewing by hand. It should be noted that in order to avoid any fall of the electronic reception and processing module 50 housed inside the case 60, the latter remains connected to the cable 70 at all times.
• the operator then positions the case 60 inside the first housing part, by seeking, by pivoting the case 60, the appropriate position corresponding to the keying means.
• the displacement in translation of the case 60, in the longitudinal direction Y, makes it possible to move the case 60 upwards inside the case 20 and to make the connection of the coaxial outputs 33, 41 of the receiving antenna ADS-B signals 30 and the GPS signal receiving antenna 40.
• the electronic reception and processing module 50 comprises calculation means adapted to date the received ADS-B signals and / or to verify the geographical positioning of the ADS-B signal receiving antenna from the GPS signals received by the GPS signal receiving antenna 40.
• the signal receiving station 10 thus integrates the electronic means for processing the ADS-B signal.
• the co-location of the two ADS-B signal reception antennas 30 and the GPS signals 40 as well as the absence of distance between these antennas and the electronic signal receiving and processing module 50 eliminate the risk of measurement errors. unlike installations using transmission cables between each antenna and their receiver.
• the multilateration calculation implements several ADS-B signal receiving antennas. From the date of reception of the signals, and thus the difference in the propagation times of the signals received at each antenna, it is possible to calculate the precise positioning of the aircraft.
• the signal receiving station described above makes it possible to obtain time-synchronized data from all the 1090 MHz signals (ADS-B signals and other signals from the transponders), allowing simplified calculations of positioning by multilateration.
• the electronic reception and signal processing module 50 can integrate more or less sophisticated signal processing functions.
• the electronic reception and processing module 50 may comprise message generation means according to the ASTERIX exchange standard category 21, making it possible to define a format of the data transported for viewing on a control screen for the air traffic control.
• It also comprises means allowing the remote parameterization and updating and configuration of the signal receiving station 10.
• the electronic reception and processing module 50 can also have functions of supervision, backup of the trace files, encryption of the data link, verification of the entire signal reception chain, etc.
• the electronic reception and processing module 50 may incorporate test means for verifying the correct operation of the reception of the ADS-B signals.
• the above-described specific embodiment of the housing 20 for housing the ADS-B signal receiving antenna, the GPS signal receiving antenna and the ADS-B signal receiving and processing electronic module and GPS signals is not limiting.
• the present invention extends to any type of structure and configuration of the housing making it possible, within this housing, to connect the ADS-B signal receiving antennas and GPS signals to the electronic reception and processing module. .

Landscapes

• Engineering & Computer Science (AREA)
• Radar, Positioning & Navigation (AREA)
• Remote Sensing (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Aviation & Aerospace Engineering (AREA)
• Position Fixing By Use Of Radio Waves (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=55752373

Family Applications (1)

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Family Cites Families (18)

• 2015
  • 2015-11-19 FR FR1561122A patent/FR3044152A1/fr active Pending
• 2016
  • 2016-11-18 WO PCT/FR2016/053014 patent/WO2017085426A1/fr active Application Filing
  • 2016-11-18 CN CN201680076502.XA patent/CN108475475A/zh active Pending
  • 2016-11-18 EP EP16809508.1A patent/EP3378051A1/de not_active Withdrawn
  • 2016-11-18 US US15/777,505 patent/US11016200B2/en active Active

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