Securing system for motor vehicle

• US 20020024460A1
• Filed: 02/23/2001
• Published: 02/28/2002
• Est. Priority Date: 02/25/2000
• Status: Active Grant

• Current Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Inventors: Gruchalski, Gerd, Ghosh, Sharmila
• Granted Patent: US 6,774,764 B2
• Time in Patent Office: Days
• US Class Current: 342/43
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: G07C 2009/00555 comprising means to detect or avoid relay attacks
• CPC Class Codes: G07C 2009/00769 with data transmission performed by wireless means
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 2209/63 Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks
• CPC Class Codes: G08B 13/1427 with transmitter-receiver for distance detection
• CPC Class Codes: G08B 13/18 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength

Abstract

A securing system, in particular for motor vehicles, comprises at least one multi-functional sensor, which is simultaneously provided both as a radar unit and as a transmitter/receiver unit for communicating with an external device such as a user identifying transponder. The device may have multiple transmitters and/or receivers spatially situated to determine whether the external device is inside or outside the vehicle and may emit a HF-modulated signal that is frequency shifted and re-emitted by the external device and received by the multi-function sensor, wherein a security function may be performed based on both identifying information in the re-emitted HF-modulated signal and the distance to the transponder determined from the time duration between emission of the HF-modulated signal and reception of the re-emitted HF-modulated signal.

Claims

1. Securing system for a motor vehicle, comprising at least one multi-functional sensor, which is simultaneously provided both as a radar unit and as a transmitter/receiver unit for communicating with an external device.

2. Securing system in accordance with claim 1, wherein the external device is formed by a device which serves for the user identification and which is realized in particular through an active receiver/transmitter unit or transponder.

3. Securing system in accordance with claim 2, wherein the multi-functional sensor comprises a short distance radar sensor operating in the high frequency range for an interior space protection.

4. Securing system in accordance with claim 3, wherein the multi-functional sensor comprises at least two transmitters and/or at least two receivers for localizing the external device.

5. Securing system in accordance with claim 4, wherein the signals which are received by different receivers are compared with one another for localizing the external device inside or outside the monitored interior space.

6. Securing system in accordance with claim 4, wherein the signals which are originating from different transmitters are compared with one another for localizing the external device inside or outside the monitored interior space.

7. Securing system in accordance with claim 4, wherein the respective distance between the multi-functional sensor and the external device is determined through measurement of the travel time of the signals which are exchanged between the multi-functional sensor and the external device.

8. Securing system in accordance with claim 7, wherein the external device picks up signals which are originating from the multi-functional sensor, preferably HF-modulated signals, modifies them in a defined way and then emits them again.

9. Securing system in accordance with claim 7, wherein the signals which are originating from the multi-functional sensor are HF-modulated signals.

10. Securing system in accordance with claim 8, wherein the travel time measurement takes place on the basis of the signals which are picked up again by the multi-functional sensor and are modified in a defined way by the external device.

11. Securing system in accordance with claim 10, wherein the external device picks up signals which are originating from the multi-functional sensor and shifts them by a definite predetermined frequency.

12. Securing system for a motor vehicle, comprising at least one multi-functional sensor, which is simultaneously provided both as a radar unit and as a transmitter/receiver unit for communicating with an external device, wherein the multifunction sensor emits HF-modulated signals which are received by a user identifying transponder, the user identifying transponder shifts the signals in frequency and re-emits the signals with added identifying information, and the multi-function sensor receives the re-emitted signals and determines whether to perform a function based on both the added identifying information and a distance of the user identifying transponder derived from a time duration between the emission of the HF-modulated signal and the reception of the frequency shifted, re-emitted HF-modulated signal.