WO2000077541A1 - Method for determining the distance between two devices in an identification system - Google Patents
Method for determining the distance between two devices in an identification system Download PDFInfo
- Publication number
- WO2000077541A1 WO2000077541A1 PCT/EP2000/004028 EP0004028W WO0077541A1 WO 2000077541 A1 WO2000077541 A1 WO 2000077541A1 EP 0004028 W EP0004028 W EP 0004028W WO 0077541 A1 WO0077541 A1 WO 0077541A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- distance
- devices
- duration
- received
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
- B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
-
- 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
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
- G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/20—Individual registration on entry or exit involving the use of a pass
- G07C9/28—Individual registration on entry or exit involving the use of a pass the pass enabling tracking or indicating presence
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B85/00—Details of vehicle locks not provided for in groups E05B77/00 - E05B83/00
- E05B85/01—Mechanical arrangements specially adapted for hands-free locking or unlocking
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
- G07C2009/00793—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by Hertzian waves
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
- G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
- G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
Definitions
- the invention relates to a method for determining the distance between two devices of an identification system.
- electronic identification and access systems which have a transmitter and a receiver for electromagnetic signals and which can be operated with a radio key which, at the push of a button, is prompted by a signal emitted by the transmitter or automatically sends out electromagnetic signals that identify or give access to the owner.
- a control unit sends requesting signals continuously or by touching, for example a door handle of a door that is still locked, which, when received by a suitable radio key, stimulate the latter to transmit its signal.
- the control device then automatically enables access, for example to the door in question.
- radio keys cannot be precisely controlled due to reflections and the like, so that if a remote radio key is accidentally stimulated, the identification system may react inappropriately by bringing the key signal from a distance.
- an electromagnetic signal is emitted by a first of the devices, which is formed by an oscillation train with a predetermined amplitude profile and a predetermined duration, the amplitude of which continuously decreases at the end of the oscillation train, that the signal is received that the duration of the a portion of the received signal exceeding a predetermined amplitude threshold value is measured and that the distance between the devices is determined from this measured duration.
- a first embodiment of the invention provides that the signal is received by the second of the devices and the distance is determined there.
- the signal is received by the second of the devices and sent back to the first device and that the returned signal is received by the first device and the distance is determined there or that the signal from the second of the devices is received, that the duration of the portion of the received signal exceeding a predetermined amplitude threshold value is measured there and that the value of the measured duration is sent back to the first device.
- the signal is only reflected to double the total distance to the transmitter.
- the evaluating electronics can also be accommodated in the first device, so that the second device can be constructed in a very compact manner.
- the distance can be determined in the sending device. The duration of the signal received by the second device is only measured there and sent back as a numerical value.
- the amplitude of the transmitted signal is essentially constant from an initial settling range of the oscillation train up to the beginning of its continuously decreasing end range.
- a vibration train running according to the invention is achieved in a further embodiment of the invention in that a resonance circuit of the first device for generating the signal to be transmitted is supplied with a square-wave signal such that the amplitude of the transmitted signal steadily decays towards the end of the amplitude curve due to the resonance circuit reverberating.
- the one formed for the transmission of such signals from the transmitting antenna and a capacitor The resonant circuit should have a high quality and thus a noticeable post-oscillation duration.
- the distance is determined from the difference between the duration of the transmitted signal and the measured duration by comparison with a calibration characteristic of the signal duration over the distance.
- a first application for the method according to the invention arises if one of the two devices is an access device and the other device is a suitable radio key, and specifically if the unlocking device is an unlocking device of a motor vehicle.
- An access mechanism can thus be designed, for example, in such a way that unlocking of the motor vehicle is prevented if the radio key is outside a predetermined radius around the motor vehicle.
- the distance is determined at least twice in succession at a predetermined time interval and the difference between the results is related to the time interval. In this way, a relative movement of the two devices to one another can be determined.
- Fig. 4 shows a received signal at a small distance between the transmitter and receiver
- Fig. 5 shows a received signal at a great distance between the transmitter and receiver.
- Fig. 1 shows two devices 1 and 2, each having a transmitter 3, 4 and a receiver 5, 6 for electromagnetic signals 7 and 8.
- the frequency of the signals 7 and 8 differs.
- the signal 7 has a frequency of 125 kHz, while the signal 8 is in the range of a few MHz or more.
- the transmitter 3 of the low-frequency transmission path sends a vibration train of known duration. By designing the transmitter 3, a decaying reverberation of the oscillation train of the signal is achieved.
- the receiver 5 Via a defined input threshold, the receiver 5 receives a signal which, depending on its distance from the transmitter 3, is weakened compared to the transmitted signal 7.
- the second device 2 measures the duration of the one input part of the received attenuated signal exceeding the threshold and sends the measured value back in numerical form as signal 8 to the first device.
- the first device 1 evaluates the measured value and uses a predetermined calibration characteristic to determine the approximate distance to the second device 2.
- a control unit 21 located in the motor vehicle transmits the low-frequency signal 7 (not shown here) via an antenna 22.
- a radio key 23 located in the vicinity and suitable for the motor vehicle receives the signal 7 via an antenna 24 and measures its duration with the aid of a connected measuring device 25. The measured value is then sent back to the control unit 21, as shown in FIG. 1, where the distance d is determined becomes.
- the distance d can be estimated with a reasonable accuracy within a radius of a few meters.
- FIGS. 4 and 5 show the signals 31' received by the second device with a small distance d between devices 1 and 2.
- the signal 31 The maximum amplitude An is converted into a square-wave signal of length tn via an amplitude threshold 41. If the devices 1 and 2 are further apart, the maximum amplitude Af of the signal 31 "arriving at the second device is reduced. After conversion via the amplitude threshold 41, a square wave signal 43 is formed, the length of which ge tf is less than that tn of the first square-wave signal 42. With the measured length tn, tf of the signal 31 ', 31 "received by the second device 2, the distance d can be estimated by comparing a calibration characteristic.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020017015965A KR20020020732A (en) | 1999-06-15 | 2000-05-05 | Method for determining the distance between two devices in an identification system |
JP2001503545A JP2003502645A (en) | 1999-06-15 | 2000-05-05 | Method for determining the distance between two devices in an identification system |
EP00927142A EP1185879A1 (en) | 1999-06-15 | 2000-05-05 | Method for determining the distance between two devices in an identification system |
BR0011651-3A BR0011651A (en) | 1999-06-15 | 2000-05-05 | Process for determining the distance between two devices of an identification system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19927319.7 | 1999-06-15 | ||
DE19927319A DE19927319A1 (en) | 1999-06-15 | 1999-06-15 | Method for determining the distance between two devices of an identification system |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000077541A1 true WO2000077541A1 (en) | 2000-12-21 |
Family
ID=7911343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/004028 WO2000077541A1 (en) | 1999-06-15 | 2000-05-05 | Method for determining the distance between two devices in an identification system |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1185879A1 (en) |
JP (1) | JP2003502645A (en) |
KR (1) | KR20020020732A (en) |
BR (1) | BR0011651A (en) |
DE (1) | DE19927319A1 (en) |
WO (1) | WO2000077541A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1041224A3 (en) * | 1999-03-29 | 2004-03-31 | Siemens Aktiengesellschaft | Device and method for releasing a secure system, especially a motor vehicle access system |
FR3007877A1 (en) * | 2013-06-28 | 2015-01-02 | Continental Automotive France | METHOD FOR SECURING A FREE HANDLING ACCESS AND / OR STARTING SYSTEM OF A VEHICLE USING TEST SIGNALS |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19957536C2 (en) | 1999-11-30 | 2003-04-03 | Siemens Ag | Anti-theft system for a motor vehicle and method for operating an anti-theft system |
WO2001066886A1 (en) | 2000-03-09 | 2001-09-13 | Siemens Aktiengesellschaft | Transmitting and receiving method, especially for detecting an id transmitter |
DE10151034B4 (en) | 2001-10-16 | 2004-02-05 | Siemens Ag | Anti-theft system, method for operating an anti-theft system and components of an anti-theft system |
EP1503349A3 (en) * | 2003-08-01 | 2005-12-07 | Fachhochschule Köln | ASK (Amplitude Shift Keying) signal analysis |
JP2008045301A (en) * | 2006-08-11 | 2008-02-28 | Nissan Motor Co Ltd | Opening and closing control system for vehicle and opening and closing control method for vehicle |
DE102007004814B4 (en) * | 2007-01-31 | 2013-06-06 | Continental Automotive Gmbh | Quality adjustment of a receiving circuit |
JP5889214B2 (en) * | 2013-01-08 | 2016-03-22 | 三菱電機株式会社 | Position detection system |
FR3042631B1 (en) * | 2015-10-19 | 2019-09-13 | Valeo Comfort And Driving Assistance | METHOD OF EVALUATING DISTANCE SEPARATING IDENTIFIER AND VEHICLE, ELECTRONIC UNIT AND IDENTIFIER THEREOF |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4454512A (en) * | 1979-05-23 | 1984-06-12 | Michael Millett | Secondary radar system |
US5293160A (en) * | 1989-11-02 | 1994-03-08 | Nissan Motor Company, Ltd. | Keyless vehicle lock system with distance measuring |
GB2291303A (en) * | 1994-07-14 | 1996-01-17 | Brian Duffy | Relative position detection |
DE4440855A1 (en) * | 1994-11-15 | 1996-05-30 | Oliver Simons | Proximity-sensitive access control system |
US5666662A (en) * | 1993-07-23 | 1997-09-09 | Nec Corporation | Method for detecting the location of a mobile terminal |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3215942A1 (en) * | 1982-04-29 | 1983-11-03 | Franz 7963 Altshausen Fuchshuber | Monitoring device |
DE4409167C1 (en) * | 1994-03-17 | 1995-06-29 | Siemens Ag | Remote-controlled centralised locking system for automobile |
FR2754091B1 (en) * | 1996-09-27 | 1998-12-31 | Valeo Electronique | DUAL-RANGE RF REMOTE CONTROL FOR MOTOR VEHICLE |
-
1999
- 1999-06-15 DE DE19927319A patent/DE19927319A1/en not_active Withdrawn
-
2000
- 2000-05-05 KR KR1020017015965A patent/KR20020020732A/en not_active Application Discontinuation
- 2000-05-05 BR BR0011651-3A patent/BR0011651A/en not_active Application Discontinuation
- 2000-05-05 WO PCT/EP2000/004028 patent/WO2000077541A1/en not_active Application Discontinuation
- 2000-05-05 EP EP00927142A patent/EP1185879A1/en not_active Withdrawn
- 2000-05-05 JP JP2001503545A patent/JP2003502645A/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4454512A (en) * | 1979-05-23 | 1984-06-12 | Michael Millett | Secondary radar system |
US5293160A (en) * | 1989-11-02 | 1994-03-08 | Nissan Motor Company, Ltd. | Keyless vehicle lock system with distance measuring |
US5666662A (en) * | 1993-07-23 | 1997-09-09 | Nec Corporation | Method for detecting the location of a mobile terminal |
GB2291303A (en) * | 1994-07-14 | 1996-01-17 | Brian Duffy | Relative position detection |
DE4440855A1 (en) * | 1994-11-15 | 1996-05-30 | Oliver Simons | Proximity-sensitive access control system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1041224A3 (en) * | 1999-03-29 | 2004-03-31 | Siemens Aktiengesellschaft | Device and method for releasing a secure system, especially a motor vehicle access system |
FR3007877A1 (en) * | 2013-06-28 | 2015-01-02 | Continental Automotive France | METHOD FOR SECURING A FREE HANDLING ACCESS AND / OR STARTING SYSTEM OF A VEHICLE USING TEST SIGNALS |
Also Published As
Publication number | Publication date |
---|---|
EP1185879A1 (en) | 2002-03-13 |
KR20020020732A (en) | 2002-03-15 |
JP2003502645A (en) | 2003-01-21 |
BR0011651A (en) | 2002-03-19 |
DE19927319A1 (en) | 2000-12-21 |
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