EP0767946B1 - Einrichtung zur erfassung von fahrzeugen - Google Patents
Einrichtung zur erfassung von fahrzeugen Download PDFInfo
- Publication number
- EP0767946B1 EP0767946B1 EP95923115A EP95923115A EP0767946B1 EP 0767946 B1 EP0767946 B1 EP 0767946B1 EP 95923115 A EP95923115 A EP 95923115A EP 95923115 A EP95923115 A EP 95923115A EP 0767946 B1 EP0767946 B1 EP 0767946B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle
- unit
- conductor loops
- identification unit
- switch
- 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.)
- Expired - Lifetime
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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 relates to a device for detecting and checking vehicles, especially in parking garages or toll stations.
- GB-A 2169173 describes a device for the detection and control of Vehicles, especially known at toll stations, which have been laid in the carriageway Has conductor loop with an adjustable capacitor device on a Resonance frequency is tuned and fed by an oscillator with alternating current becomes.
- the conductor loop is connected to an evaluation unit, which by the Presence of a vehicle certain changes in inductance of the conductor loop recognizes, as well as with a transceiver for contactless Communication with an identification unit arranged on or in the vehicle connected.
- the evaluation unit and the transmitting / receiving device consist of essentially the same hardware components and can be accessed via a Current detection device for the conductor loop fed with a fixed frequency determine the presence of a vehicle and after detection of the presence of a vehicle using the conductor loop as antenna data with the Replace identification unit, depending on which a signal for the vehicle is controlled.
- the data is transferred between the vehicle and the transceiver essentially with the frequency with which the conductor loop for the presence detection is fed.
- the data transfer between the transceiver and the vehicle takes place with a much higher one Frequency.
- the object of the invention is to provide such a device in which to detect and Control of vehicles a double use of the conductor loop is done with one to create the simplest possible structure, so that existing systems without large structural interventions can be retrofitted.
- the system of the invention can be used, for example, when entering and exiting use a parking garage or underground car park.
- a microprocessor automatically does the whole Facility initially operates in the first mode to ensure presence metallic vehicle components. As soon as this presence is recognized the microprocessor switches over the electronically implemented one, for example Switch automatically switches to the second operating mode and tries one Read identification unit. If an identification unit is attached to the vehicle the data can then be processed further, for example with a Authorization database can be compared. Is this not possible or none Authorization is available, a parking ticket will be issued. After passing The microprocessor can then switch this vehicle back into the first operating mode switch back.
- Fig. 1 the usual arrangement in parking garages or underground garages is shown.
- the Three conductor loops S1, S2, S3 are laid on the floor. These capture over a in the Column 2 schematically shown evaluation unit 3, the presence of metallic Vehicle components above the conductor loops S1, S2, S3. If one If the vehicle moves over loops S1, S2, a parking ticket is issued and the barrier 4 opens.
- Loop S3 can be used to determine whether that Vehicle has left the area of the barrier in order to prevent it from using collided with the vehicle when closing.
- Via the loops S1, S2, S3 and the Evaluation unit can essentially only the presence of metallic Vehicle components and only record their structure to a limited extent. A actual identification of individual guest vehicles is therefore not possible.
- the invention provides that an identification unit 6 is provided on vehicles 5, in the vehicle and / or driver-specific data are stored.
- the conductor loops S1, S2, S3 also act as an antenna Receiving device used to read the data of the identification unit 6 be (Fig. 2).
- the conductor loops are therefore used twice, once - by how previously common - just to detect the presence of metallic vehicle components and additionally as an antenna for reading the identification unit 6 on a vehicle 5.
- FIG. 3 A simple embodiment of the device according to the invention is schematic shown in Fig. 3, in which only one conductor loop S1 laid in the ground current-carrying conductor loops S1, S2, S3 with one connected to them Evaluation unit 3 is shown. This is used to record changes in the Current in the conductor loops, which are caused by the presence of metallic Vehicle components are caused above the conductor loops. It can So it can be detected whether a vehicle is above the conductor loops.
- a simple exemplary embodiment shown in FIG. 3 is now a changeover switch 7 provided, which can of course also be implemented electronically. This Switch 7 is controlled via a control line 8 when the evaluation unit detects that a vehicle is on the loops. Then the switch 7 goes to the in Fig.
- FIG. 3 shown position in a position in which he loops with the receiving device for reading the identification unit 6 on the vehicle 5. In In this position, the conductor loops thus act as an antenna for the receiving device 9.
- the receiving device 9 can now be shown schematically Read and read identification unit 6, which is actually above loop S1 for example, compare the read data with stored data. After this Reading process or a certain period of time can then switch 7 in again the position shown in Fig. 3 decrease.
- the one shown in Fig. 3 Embodiment can in principle be practically unchanged from a previous system continue to use. It is only by a switch 7 and a receiving device 9 added.
- the evaluation unit for Presence detection of metallic vehicle components and the (transmission and) Receiving device for communication with the identification unit essentially consist of the same hardware components.
- the same hardware components which advantageously comprise a microprocessor, can then be simply in a first operating mode as an evaluation unit for presence detection metallic vehicle components and in a second operating mode as (transmit and) Receiving device for communication with the identification unit 6 on the vehicle use.
- FIGS. 4 and 5 Such an embodiment is shown in FIGS. 4 and 5.
- the one shown there The device thus works both as an evaluation unit 3 for mere presence detection metallic vehicle components as well as a receiving device for reading the data stored in the identification unit 6.
- the device shown in FIG. 4 has an oscillator 10 which, via a power amplifier 11, supplies the loops S1, S2, S3 shown schematically in the floor with alternating current of fixed frequency f 0 .
- this frequency is typically in the range of approximately 100-150 kHz.
- the conductor loops S1 to S3 can be operated in time-division multiplex operation via the control line 12 and the switch unit 13 in order to obtain more precise information about the vehicle position. In principle, however, the device would also work with a conductor loop S1, which is why only the conductor loop S1 is referred to below.
- the oscillator 10 in the exemplary embodiment shown in FIG. 4 definitely specifies a fixed frequency. If the series resonant circuit S1, 14 is ideally tuned to this frequency f 0 , a current with the maximum current intensity flows through the conductor loop S1 and the current detection device 15.
- any detuning of the series resonant circuit S1, 14 against the frequency f 0 brings about a reduction in the current intensity (amplitude of the alternating current). This is used to be able to use the current intensity detected in the current detection device 15 as a measurement signal. Via a filter device 16 and an analog-digital converter 17, the current value in digital form is thus available to the microprocessor 19 on the line 18 and can therefore be easily further processed digitally.
- FIG. 5 shows an example of the time profile of the current intensity detected by the detection device 15.
- the maximum current (amplitude A1) is present in area A.
- the current amplitude therefore drops to the value A2 when a vehicle is present.
- the microprocessor 19 recognizes this in the digital current signal 18, it controls the amplifier 11 in a suitable manner via the control line 20 in order to generate current pulses in the loop S1, as shown in area C. These current pulses or the transmitters caused thereby in the vicinity of the loop S1 are used to query the identification unit 6.
- the conductor loop S1 thus works in the area C as a transmitter antenna.
- the identification device has an antenna 21 and a capacitor 22.
- the switch 23 When the switch 23 is closed, it is possible via this circuit to provide the necessary supply voltage for the electronic logic circuit 25 after rectification in a rectifier 24.
- the identification unit 6 is thus “woken up” by the transmitter pulses from the conductor loop S1.
- Such battery-free identification units are basically already known to the person skilled in the art and therefore do not need to be described in detail.
- After “waking up” it is now a question of the identification unit 6 sending back vehicle-specific or driver-specific data which are stored, for example, in an E 2 PROM 26.
- the logic circuit 25 receives this stored data and controls the switch 23 via the control line 27 in order to transmit the binary (0/1) -coded data.
- the resonant circuit 21, 22 is interrupted and thus further dampens the amplitude of the current in the conductor loop S1 to a value A3, as shown in area D in FIG. 5. In this way, it is possible to transmit the data stored in E 2 PROM 26 to the receiving device 9 in a contactless manner, the conductor loop S1 then functioning as a receiving antenna. If the receiving device 9 determines that it is not receiving any data, then the vehicle is not equipped with any (or a non-functioning) identification unit 6. In this case, the microprocessor 19 opens the barrier 29 via the amplifier unit 28 after it has issued a parking ticket via a parking machine (not shown).
- the microprocessor 19 can check the read data for authorization with internally or externally stored data in a database and, in the event of a positive result, immediately open the barrier 29 without issuing a parking ticket. This enables vehicles with a valid identification unit to pass control stations quickly and easily, in particular barriers at the entrance to a parking garage or underground car park.
- a particularly advantageous automatic adjustment of the resonant circuit consisting of the conductor loop S1 and the capacitor device 14 to the driver frequency f 0 would have to be added . It has been shown that the inductance of the conductor loop S1 varies due to external influences or moisture. By changing the capacitance of the capacitor arrangement 14, an optimal adjustment of the resonant circuit to the fixed driver frequency f 0 can always be achieved. From time to time, the microprocessor can selectively switch on and off the schematically represented switches of the individual capacitors C1 to C5 via the control line 30 until the digital current value on line 18 becomes maximum.
- the resonant circuit S1, 14 formed is then ideally matched to the oscillator frequency f 0 .
- capacitors with adjustable capacitance for example variable capacitors for the adjustment. In order to avoid mechanically moving components, however, the solution shown in FIG. 4 seems to be cheaper.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Near-Field Transmission Systems (AREA)
- Traffic Control Systems (AREA)
- Geophysics And Detection Of Objects (AREA)
Description
Claims (6)
- Einrichtung zur Erfassung und Kontrolle von Fahrzeugen (5), insbesondere in Parkgaragen oder an Mautstellen, mit zwei oder mehreren, in Fahrrichtung hintereinander angeordneten, vorzugsweise in der Fahrbahn verlegten Leiterschleifen (S1, S2, S3), die mit einer gegebenenfalls in der Kapazität einstellbaren Kondensatoreinrichtung (14) auf eine Resonanzfrequenz abgestimmt sind, welche Leiterschleifen (S1, S2, S3) von einem Oszillator (10) mit Wechselstrom gespeist werden und mit einer Auswerteeinheit (3) verbunden sind, die durch die Anwesenheit eines Fahrzeuges (5) bestimmte Induktivitätsänderungen der Leiterschleifen (S1, S2, S3) erkennt, wobei die Leiterschleifen (S1, S2, S3) mit einer Sende/Empfangseinrichtung (9) zur berührungslosen Kommunikation mit einer am oder im anwesenden Fahrzeug (5) angeordneten Identifikationseinheit (6) verbunden sind, wobei die Auswerteeinheit (3) und die Sende/Empfangseinrichtung (9) aus im wesentlichen denselben Hardwarekomponenten bestehen, über eine Stromerfassungseinrichtung (15) für die mit fester Frequenz gespeisten Leiterschleifen (S1, S2, S3) in einer ersten Betriebsart die Änderung der Stromstärke durch die Anwesenheit eines Fahrzeuges (5) feststellen, und nach Erkennung der Anwesenheit des Fahrzeuges (5) in einer zweiten Betriebsart mit derselben Frequenz in der Identifikationseinheit (6) gespeicherte Daten erfassen, in deren Abhängigkeit ein Schranken (29), eine Ampel oder ein anderes Signal für das Fahrzeug (5) gesteuert werden, und wobei die Leiterschleifen (S1, S2, S3), über deren Bedämpfung die Passage des identifizierten Fahrzeuges (5) feststellbar ist, über einen Umschalter (7) mit der Auswerteeinheit (3) verbunden sind, wodurch der Empfangsbereich der Sende/-Empfangseinheit vergrößert ist.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Identifikationseinheit (6) einen elektronischen Datenspeicher (26), beispielsweise ein E2PROM, eine Sendeeinheit (21, 22) zur berührungslosen Übermittlung der gespeicherten Daten an die Empfangseinrichtung (9), eine Einrichtung zur Gewinnung (21, 22, 24) einer Versorgungsspannung für ihre elektronische Komponenten (25, 26) aus der Feldenergie der Leiterschleife (S1, S2, S3) und einen Schwingkreis (21, 22) aufweist, der über einen Schalter (23) unterbrechbar ist, wobei der Schalter (23) von einer elektronischen Steuereinheit (25) in Abhängigkeit von gespeicherten Daten gesteuert ist.
- Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Identifikationseinheit (6) außen am Fahrzeug (5), vorzugsweise an dessen Unterseite angebracht ist.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Stromerfassungseinrichtung (15) ein Analog-Digital-Wandler (17) zum Bereitstellen eines digitalen Stromstärken-Wertes nachgeschaltet ist.
- Einrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Kondensatoreinrichtung (14) zwei oder mehrere zueinander parallele Kondensatoren (C1-C5) umfaßt, die über eine Schaltereinheit selektiv wahlweise zu- und abschaltbar sind, um die Gesamtkapazität zu verstellen.
- Einrichtung nach Anspruch 5, dadurch gekennzeichnet, daß eine vorzugsweise durch einen programmierten Mikroprozessor (19) realisierte Abgleicheinrichtung vorgesehen ist, die - vorzugsweise in regelmäßigen Zeitabständen - die Kapazität der Kondensatoreinrichtung (14) automatisch abgleicht, bis die Stromstärke bei nicht vorhandenem Fahrzeug maximal ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT1291/94 | 1994-06-30 | ||
| AT129194 | 1994-06-30 | ||
| PCT/AT1995/000141 WO1996000958A1 (de) | 1994-06-30 | 1995-06-30 | Einrichtung zur erfassung von fahrzeugen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0767946A1 EP0767946A1 (de) | 1997-04-16 |
| EP0767946B1 true EP0767946B1 (de) | 1999-01-13 |
Family
ID=3510713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95923115A Expired - Lifetime EP0767946B1 (de) | 1994-06-30 | 1995-06-30 | Einrichtung zur erfassung von fahrzeugen |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0767946B1 (de) |
| AT (1) | ATE175798T1 (de) |
| DE (1) | DE59504829D1 (de) |
| WO (1) | WO1996000958A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3937323A1 (de) * | 2020-07-09 | 2022-01-12 | Camping-Car Park | Ausrüstung für wohnmobilstellplätze |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6781524B1 (en) * | 2000-03-17 | 2004-08-24 | Magnemotion, Inc. | Passive position-sensing and communications for vehicles on a pathway |
| US20030052783A1 (en) * | 2001-09-17 | 2003-03-20 | Sitzman William B. | Dock door RFID system |
| DE10321201A1 (de) * | 2003-05-12 | 2004-12-09 | Skidata Ag | Parkkontrollvorrichtung |
| DE102006014148B4 (de) * | 2006-03-24 | 2008-02-14 | Datacollect Traffic Systems Gmbh & Co. Kg | Vorrichtung zum Ermitteln von Daten |
| US8616134B2 (en) | 2009-01-23 | 2013-12-31 | Magnemotion, Inc. | Transport system powered by short block linear synchronous motors |
| US9032880B2 (en) | 2009-01-23 | 2015-05-19 | Magnemotion, Inc. | Transport system powered by short block linear synchronous motors and switching mechanism |
| KR101066606B1 (ko) * | 2009-10-14 | 2011-09-22 | 모루인벤 주식회사 | 저전력동작형 루프식 차량검지장치 |
| KR102331404B1 (ko) | 2013-09-21 | 2021-11-25 | 마그네모션, 인코포레이티드 | 패키징 등에 사용되는 리니어 모터 운송 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3685013A (en) * | 1970-08-14 | 1972-08-15 | Joseph L Brickner | Self-adjusting vehicle detector system |
| GB8432807D0 (en) * | 1984-12-31 | 1985-02-06 | Emx International Ltd | Loop data link |
| NL8601021A (nl) * | 1986-04-22 | 1987-11-16 | Nedap Nv | Programmeerbare responder. |
| EP0290161A3 (de) * | 1987-05-08 | 1989-06-28 | Detector Systems Inc. | Fahrzeugübertragungssystem mit Strassenschleifen |
-
1995
- 1995-06-30 DE DE59504829T patent/DE59504829D1/de not_active Expired - Lifetime
- 1995-06-30 EP EP95923115A patent/EP0767946B1/de not_active Expired - Lifetime
- 1995-06-30 AT AT95923115T patent/ATE175798T1/de not_active IP Right Cessation
- 1995-06-30 WO PCT/AT1995/000141 patent/WO1996000958A1/de not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3937323A1 (de) * | 2020-07-09 | 2022-01-12 | Camping-Car Park | Ausrüstung für wohnmobilstellplätze |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59504829D1 (de) | 1999-02-25 |
| ATE175798T1 (de) | 1999-01-15 |
| WO1996000958A1 (de) | 1996-01-11 |
| EP0767946A1 (de) | 1997-04-16 |
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