Unlock instant, AI-driven research and patent intelligence for your innovation.

Electronic key system for vehicles

An electronic key and vehicle technology, applied in the field of electronic key systems for vehicles, can solve problems such as inability to cope

Inactive Publication Date: 2020-11-24
DENSO CORP
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Furthermore, in the research structure described above, it is impossible to deal with the case where each communication device outside the vehicle is removed from the vehicle and relays the baseband signal.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electronic key system for vehicles
  • Electronic key system for vehicles
  • Electronic key system for vehicles

Examples

Experimental program
Comparison scheme
Effect test

Deformed example 1

[0112] In the above-mentioned embodiment, when specifying the distance between communication devices, two in-vehicle communication devices 12 to be range-measured exchange signals including source information and destination information. However, the present invention is not limited thereto. It may also be configured such that the round-trip time is measured by transmitting and receiving a single-pulse signal through the in-vehicle communication device 12 .

[0113] The in-vehicle communication device 12 of this modified example transmits a monopulse signal as a response request signal based on an instruction from the authentication ECU 11 . In addition, when the two in-vehicle communication devices 12 that provide the combination as the distance measurement target receive the monopulse signal, they return the monopulse signal as a response signal and a re-response signal. The authentication ECU 11 in this modified example controls the in-vehicle communication devices 12 other...

Deformed example 2

[0116] In the above-mentioned embodiments, the method of calculating the distance between communication devices using the round-trip time is disclosed, but the index for calculating the distance between communication devices is not limited to the round-trip time. It may also be configured such that each in-vehicle communication device 12 reports the reception strength of a signal transmitted from another device to the authentication ECU 11 as distance index information, and the inter-communication device distance determination unit F5 calculates the communication distance based on the reception strength detected by each in-vehicle communication device 12 . distance between devices.

[0117] In addition, it may be configured such that each in-vehicle communication device 12 generates a one-way flight time as distance index information when the in-vehicle communication devices 12 are completely synchronized under the control of the authentication ECU 11 . The one-way flight time...

Deformed example 3

[0119]In the above embodiment, each in-vehicle communication device 12 reports the round-trip time to the authentication ECU 11, and the authentication ECU 11 calculates the distance between communication devices based on the round-trip time provided from each in-vehicle communication device 12, but the present invention is not limited thereto. Each in-vehicle communication device 12 may also have a function of calculating the distance between communication devices based on the round-trip time. That is, each in-vehicle communication device 12 calculates the distance from its own device to another device to be communicated based on the round-trip time measured during wireless communication with the other device. And the data showing this distance is associated with the communication device number of each communication partner and own device, and is reported to authentication ECU11.

[0120] Also by such a structure, the same effect as that of the above-mentioned embodiment is e...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides an electronic key system for vehicles. The electronic key system for vehicles comprises a plurality of in-vehicle communicators (12, 12A-12F, 12X) and an authenticationdevice (11). Each of the plurality of in-vehicle communicators communicates wirelessly with the other in-vehicle communicators and, on the basis of signals transmitted from the other in-vehicle communicators, generates distance-related information that directly or indirectly expresses the distances to the other in-vehicle communicators. The authentication device, on the basis of a plurality of distance-related information, respectfully generated by the plurality of in-vehicle communicators, identifies a plurality of inter-communicator distances, and does not execute a vehicle control if at least one among the plurality of inter-communicator distances deviates from a prescribed normal range.

Description

[0001] Cross References to Related Applications [0002] This disclosure is based on Japanese Application No. 2018-74743 filed on April 9, 2018, and the description content thereof is incorporated herein. technical field [0003] The present disclosure relates to an electronic key system for a vehicle. Background technique [0004] Conventionally, various electronic key systems for vehicles have been proposed. An in-vehicle system mounted on a vehicle and a portable device carried by a user perform authentication processing by wireless communication, and vehicle control such as locking and unlocking of doors is executed based on the success of the authentication processing ( For example, Patent Document 1). [0005] In general, an in-vehicle system providing a vehicle electronic key system includes a plurality of communication devices (hereinafter, outside-vehicle communication devices) for performing wireless communication with portable devices existing outside the vehicle...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E05B49/00G01S13/76B60R25/24
CPCB60R25/245G01S13/765G01S13/08G01S13/0209E05B81/78B60R25/209B60R2325/205G01S13/76
Inventor 楠本哲也三治健一郎篠田卓士
Owner DENSO CORP