EP3226224A1 - Équipement de détection de la présence d'un véhicule automobile dans une zone de trafic - Google Patents

Équipement de détection de la présence d'un véhicule automobile dans une zone de trafic Download PDF

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Publication number
EP3226224A1
EP3226224A1 EP17000517.7A EP17000517A EP3226224A1 EP 3226224 A1 EP3226224 A1 EP 3226224A1 EP 17000517 A EP17000517 A EP 17000517A EP 3226224 A1 EP3226224 A1 EP 3226224A1
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EP
European Patent Office
Prior art keywords
equipment
sensor
traffic area
motor vehicle
vpde
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.)
Withdrawn
Application number
EP17000517.7A
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German (de)
English (en)
Inventor
Mario Zganec
Jerneja Zganec Gros
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alpineon doo
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Alpineon doo
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Filing date
Publication date
Application filed by Alpineon doo filed Critical Alpineon doo
Publication of EP3226224A1 publication Critical patent/EP3226224A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors

Definitions

  • the invention concerns an equipment for detecting presence of a motor vehicle on a traffic area comprising a control and supply unit and a multinode sensor cable connected thereto and comprising, besides a voltage supply bus and a serial communications bus, also sensor nodes each of which comprises a magnetometer, a microcontroller controlling said magnetometer and gathering data on measured magnetic field density on a location of said magnetometer when a motor vehicle is set thereabove, as well as a communication interface connecting said microcontroller with the serial communications bus.
  • a magnetometer detector detecting motor vehicles is known ( US 5,491,475 ).
  • a plurality of magnetometers fixed to a cable and arranged at premeasured distances is placed in a lane of a roadway.
  • Each magnetometer is mounted on a small printed wiring board provided with a signal-conditioning and data-communication electronics as well as in a sealed way attached to the cable, which conducts the lane traffic information to a handhole and further to a controller.
  • Processed outputs pass a modem and are transferred to a remote control-data station. Fabrication of a special cable equipment for each situation and its installation are expensive. Said costs must be reduced. Additionally, a failure of any component causes said equipment to fail.
  • An apparatus for contactless detection of vehicles comprises an evaluation module, a power supply module, and a string consisting of a plurality of sensor nodes and connected to said modules ( US2014/0021947 A1 ).
  • the modules are arranged in a distribution box.
  • the sensor nodes comprise a magnetometer, a microcontroller as well as a communication interface and are connected to adjacent sensor nodes by means of a cable comprising a voltage supplying bus and one serial communications bus.
  • the disclosure mainly deals with several advantageous but not necessarily reasonable sensor nodes configuration along said string to be adapted to existing parking places: the sensor nodes within a sensor nodes group are arranged at equidistant spaces, yet two adjacent sensor nodes belonging to the adjacent sensor nodes groups are spaced in a different way; also a space from the first sensor node in the string to the distribution box is different, moreover a plurality of segments of the sensor nodes string in a star-shaped or tree-shaped form is suggested, wherein the segments may comprise only one magnetometer.
  • the plurality of said sensor nodes configurations results in a time consuming and expensive fabrication and installation of the sensor nodes string. Installation of such strings needs to be performed by qualified staff.
  • the technical problem to be solved by the present invention is to fabricate an equipment for detecting presence of a motor vehicle on a traffic area in the form of a prefabricated universal equipment, which will be suitable for a rapid and simple installation at optionally arranged monitored spaces of a traffic area, in a special embodiment also for monitored spaces on a very vast traffic area.
  • a sensor ribbon of the equipment of the invention intended for detecting presence of a motor vehicle on a traffic area is uncomplicated as the sensor ribbon does not need to be matched to each disposition of monitored spaces, in which the presence of a motor vehicle should be detected.
  • Such sensor ribbon can be used universally irrespective of the disposition of the monitored spaces. It is fabricated in several variants differing from each other in an internodal spacing.
  • the sensor ribbon of the equipment of the invention is installed in a simple way and substantially more rapidly since there is no need to deal with positioning sensor nodes with respect to borderlines of the monitored spaces, this means that positions of the sensor nodes do not need to be marked in advance. Installation may be performed by non-qualified staff.
  • the equipment redundancy is advantageously provided at the installation of the equipment of the invention at the very laying of the sensor ribbon since, in any monitored space, at least two sensor nodes detect the presence of a motor vehicle; if any of them fails the equipment of the invention continues to operate. Maintenance costs of the installed equipment of the invention are considerably reduced. Due to high uniform linear density of the sensor nodes the price is only slightly increased.
  • the equipment according to said special embodiment of the invention is more fail-safe, too. If separate segments in one serial communications bus get interrupted the data flow bypasses said segments through the other serial communications bus and the equipment of the invention operates properly. Only the interruption of both serial communications buses between two adjacent sensor nodes negatively impacts the operation of the equipment.
  • An equipment VPDE detecting presence of a motor vehicle on a traffic area in a known way comprises a control and supply unit CSU and a multinode sensor cable connected thereto ( Fig. 1 ).
  • the multinode sensor cable comprises a voltage supply bus VSB, a serial communications bus CB, and sensor nodes SN.
  • Each sensor node SN in a known way comprises a magnetometer M, a microcontroller MC that controls said magnetometer M and gathers data on a variation in the magnetic field density due to a the motor vehicle approaching the magnetometer M, and a communication interface CI.
  • the communication interface CI connects said microcontroller MC with the serial communications bus CB.
  • the sensor nodes SN along the entire multinode sensor cable are advantageously equidistantly spaced from each other for an identically selected internodal spacing ins ( Figs. 1 and 2a ).
  • the selected internodal spacing ins between the sensor node SNi and the one or the other adjacent sensor node is about equally large as a half width of a narrowest anticipated motor vehicle; therefore a parked motor vehicle is detected by at least two sensor nodes SN.
  • the selected internodal spacing ins can also be somewhat shorter or longer depending on the realization.
  • the equipment VPDE for detecting presence of a motor vehicle on the traffic area logically identifies consecutive stationary states by means of signals generated by all magnetometers M.
  • Said stationary states are established by consecutively setting only one motor vehicle into one selected monitored space of the traffic area.
  • Said signals are the signals generated by all magnetometers M being close to said motor vehicle upon the establishment of each of these stationary states, said magnetometers M detecting a variation in earth magnetic field density due to a motor vehicle approaching them.
  • the equipment VPDE of the invention now assigns a label for each selected monitored space to the corresponding consecutive stationary state, which label is communicated to the equipment VPDE by means of an external communications link.
  • the equipment VPDE of the invention is set in a way that either the sensor nodes SN send measured values to the control and supply unit CSU, which decides on the presence of a motor vehicle in the monitored spaces, or the sensor nodes SN alone decide on the presence of a motor vehicle in the monitored spaces and they communicate their decisions to the control and supply unit CSU.
  • the equipment VPDE of the invention is advantageously fabricated with a general-use prefabricated multinode sensor ribbon MNSR as the multinode sensor cable.
  • a central portion of the general-use prefabricated multinode sensor ribbon MNSR is advantageously fabricated as a flexible stripwise printed circuit board PCB, whereon the voltage supply bus VSB, the serial communications bus CB and the sensor nodes SN spaced from each other at equidistant internodal spacing ins are fabricated.
  • the flexible stripwise printed circuit board PCB is made from an endless flexible stripwise printed circuit board, and is tightly enclosed by an insulating sheath IS in a way that outer transverse dimensions of the multinode sensor ribbon MNSR are barely 1 to 3 millimetres times 5 to 20 millimetres.
  • the insulating sheath IS can be in the form of a tube, too.
  • the equipment VPDE of the invention advantageously uses a three-axis magnetoresistive sensor as the magnetometer M.
  • the magnetoresistive sensor is suitable due to its low price, low energy consumption and a size of merely several square millimetres.
  • the special embodiment of the equipment VPDE of the invention along with the serial communications bus CB advantageously also comprises at least one additional serial communications bus CB' and within each sensor node SN along with the communication interface CI also comprises at least one additional communication interface CI' as well as controlled semiconductor switches CSS, CSS'.
  • the controlled semiconductor switches CSS and CSS' connect the microcontroller MC with the serial communications bus CB and the additional serial communications bus CB', respectively.
  • One of those controlled semiconductor switches is connected in a way that said disconnecting the controlled switch breaks the serial communications bus in two segments; a second controlled switch is connected in a way that said connecting the controlled switch connects communication interface with a first segment of the serial communications bus; a third controlled switch is connected in a way that said connecting the controlled switch connects communication interface with a second segment of the serial communications bus.
  • the controlled semiconductor switches CSS and CSS' are assumed to be set in a way that each of said two serial communications buses CB and CB', respectively, is closed and the communication interfaces CI and CI', respectively, of the sensor node SN are disconnected from the serial communications buses CB and CB', respectively.
  • the semiconductor switches CSS and CSS' are set in the assumed position and the non-functioning sensor node SN is disconnected from the serial communications bus CB and CB', respectively.
  • the controlled semiconductor switches CSS and CSS' enable the sensor node SN to break the serial communications bus CB and CB', respectively, and to connect its communication interface CI and CI', respectively, to the uninterrupted serial communications bus CB and CB', respectively, or to one of said two segments of the interrupted serial communications bus CB and CB', respectively.
  • the microcontroller MC may break one of the serial communications buses CB, CB', to which it is connected, in two segments. In this way, it is connected to one of the segments of the interrupted serial communications bus CB, CB'. In this case, it passes data between the segment of the serial communications bus, to which it is connected, and the other segment of the serial communications bus, thus preserving the data flux through the entire multinode sensor ribbon MNSR.
  • Segmentation of the serial communications bus into several segments guarantees that a particular segment does not exceed the largest physically admissible length of the serial communications bus as well as the largest number of the sensor nodes connected to the selected type of the serial communications bus. Segmentation of the serial communications bus does not limit the data flux since it is redirected to the other serial communications bus.
  • the multinode sensor ribbon MNSR of the equipment of the invention is laid over the entire traffic area from the control and supply unit CSU up to the last monitored space of the traffic area along the shortest connecting path such that it runs roughly through the middle of each monitored space - e.g . intended for parking motor vehicles side by side ( Fig. 2a ) and behind one another ( Fig. 2b ) - of the monitored traffic area and it is secured to the traffic area covering; an upper surface of the multinode sensor ribbon MNSR is protected.
  • the sensor ribbon may be installed by non-qualified staff since the path selection is not too demanding. Namely, due to high linear density of the sensor nodes SN within the multinode sensor ribbon MNSR no special laying configurations within an individual monitored space are needed.
  • the laid multinode sensor ribbon MNSR is either inserted into a groove cut into the traffic area and cast with a suitable protective mass or simply secured to the traffic area covering.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
EP17000517.7A 2016-04-01 2017-03-29 Équipement de détection de la présence d'un véhicule automobile dans une zone de trafic Withdrawn EP3226224A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SI201600092A SI25180A (sl) 2016-04-01 2016-04-01 Naprava za zaznavanje prisotnosti motornega vozila na prometni površini

Publications (1)

Publication Number Publication Date
EP3226224A1 true EP3226224A1 (fr) 2017-10-04

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EP17000517.7A Withdrawn EP3226224A1 (fr) 2016-04-01 2017-03-29 Équipement de détection de la présence d'un véhicule automobile dans une zone de trafic

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EP (1) EP3226224A1 (fr)
SI (1) SI25180A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111417280A (zh) * 2020-05-22 2020-07-14 东莞市技师学院(东莞市高级技工学校) 一种电气自动化设备的检测装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5471139A (en) * 1993-06-28 1995-11-28 Ems Development Corporation Fiber optic line magnetometer having thermal compensation
US5491475A (en) 1993-03-19 1996-02-13 Honeywell Inc. Magnetometer vehicle detector
WO2009144029A1 (fr) * 2008-05-30 2009-12-03 Meas Deutschland Gmbh Dispositif de détection d’au moins une propriété d'un véhicule lié à une surface
US20140021947A1 (en) 2012-07-19 2014-01-23 Mobilisis Gmbh Apparatus and method for the contactless detection of vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5491475A (en) 1993-03-19 1996-02-13 Honeywell Inc. Magnetometer vehicle detector
US5471139A (en) * 1993-06-28 1995-11-28 Ems Development Corporation Fiber optic line magnetometer having thermal compensation
WO2009144029A1 (fr) * 2008-05-30 2009-12-03 Meas Deutschland Gmbh Dispositif de détection d’au moins une propriété d'un véhicule lié à une surface
US20140021947A1 (en) 2012-07-19 2014-01-23 Mobilisis Gmbh Apparatus and method for the contactless detection of vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111417280A (zh) * 2020-05-22 2020-07-14 东莞市技师学院(东莞市高级技工学校) 一种电气自动化设备的检测装置
CN111417280B (zh) * 2020-05-22 2021-02-02 东莞市技师学院(东莞市高级技工学校) 一种电气自动化设备的检测装置

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Publication number Publication date
SI25180A (sl) 2017-10-30

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