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Electronic key device

一种电子钥匙、便携设备的技术，应用在运输和包装、仪器、防窃用的车辆配件等方向，能够解决门或行李箱解锁等问题，达到可靠解锁的效果

Active Publication Date: 2016-01-13
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the wireless device of Patent Document 1 and the control system of Patent Document 2, for example, when a user who does not intend to enter the vehicle passes through an approach unlock area within a predetermined distance from the vehicle, the door or the trunk may also be closed. problems that will be unlocked

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0051] figure 1 It is a block diagram showing the configuration of the electronic key device according to the first embodiment. also, image 3 The structure of the in-vehicle device in the first embodiment is shown.

[0052] The electronic key device according to the first embodiment is provided with an in-vehicle device 2 on the vehicle 1 side, and performs wireless communication with a portable device 3 carried by the user to unlock a plurality of compartment doors 1a and trunk doors 1b. and other prescribed controls of the vehicle 1 . Here, the doors include a compartment door 1a and a trunk door 1b.

[0053] The in-vehicle device 2 includes an electronic control unit 2 a arranged in the vehicle 1 , three transmitting antennas ANT1 to ANT3 , and a receiving antenna 14 . The electronic control unit 2 a includes a vehicle receiving unit 10 (receiving unit), a vehicle transmitting unit 11 (transmitting unit), a vehicle controlling unit 12 (control unit), and a memory 13 . ...

example 1

[0084] exist image 3 In the example 1 shown, the user U carrying the mobile device 3 is at the position P11 at a certain time, and moves to the position P12 at a time one cycle later. The position P11 is within the proximity detection area Ad, and the position P12 is within the proximity unlocking area Au. By moving from the position P11 to the position P12, the mobile device 3 approaches the vehicle 1 . Here, the distance from each position to each antenna is defined as follows. This definition is also the same for Examples 2-4.

[0085] Distance from position P11 to antenna ANT1: L1-before,

[0086] Distance from position P11 to antenna ANT3: L3-before,

[0087] Distance from position P12 to antenna ANT1: L1-after,

[0088] Distance from position P12 to antenna ANT3: L3-after,

[0089] The processing flow in the electronic key device at this time is as follows.

[0090] (1) The portable device 3 calculates the distance between each antenna and the portable device 3 ba...

example 2

[0097] exist Figure 4 In the example 2 shown, the user U carrying the mobile device 3 is at the position P21 at a certain time, and moves to the position P22 at the time one cycle later. The position P21 is in the approach detection area Ad, and the position P22 is in the approach unlocking area Au, but the movement from the position P21 to the position P22 is a movement parallel to the right compartment door 1a. Here, since the definitions of the distances from the positions P21 and P22 to the respective antennas are the same as those in Example 1, they are omitted.

[0098] The processing flow in the electronic key device at this time is as follows.

[0099] (1) The portable device 3 calculates the distance between each antenna and the portable device 3 based on radio waves received from the in-vehicle device 2 at predetermined intervals. When the user arrives at the position P21, it is judged that the portable device 3 has entered the approach detection area Ad ( figur...

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Abstract

An electronic key device includes a portable device (3)capable of being carried by a user, and a vehicle-mounted device (2) configured to perform mutual communication with the portable device (3). The vehicle-mounted device (2) includes a plurality of antennas (ANT1, ANT2, ANT3) that is provided in different positions of a vehicle and is configured to transmit radio waves every predetermined time. A response signal based on the reception strength of the radio waves transmitted from the plurality of antennas is transmitted from the portable device (3) to the vehicle-mounted device (2). The vehicle-mounted device (2) determines that a moving direction of the portable device (3) heads for any one of the antennas based on the response signal, and when it is determined that a distance between the vehicle (1) and the portable device (3) is equal to or less than a predetermined threshold, control is performed such that a door (1a, 1b) becomes unlocked.

Description

technical field [0001] The present invention relates to an electronic key device for performing predetermined control such as unlocking a door of a vehicle by mutual communication between an in-vehicle device and a portable device. Background technique [0002] In the wireless device described in Patent Document 1, the portable unit receives radio waves transmitted from a plurality of antennas installed at different positions in the vehicle, and the main body control unit calculates the distance between the portable unit and the vehicle based on the electric field strength measured by the portable unit. The relative position of the vehicle, and based on this to control the locking or unlocking of the vehicle's door. [0003] In the control system described in Patent Document 2, an RSSI confirmation command is transmitted from an LF transmission unit provided in a vehicle door or trunk (trunk), and on the key side, the RSSI value of the received RSSI confirmation command is d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07C9/00
CPCB60R25/245G07C9/00309G07C2209/63
Inventor 宫泽明中原一郎清野胜宏三瓶喜生
Owner ALPS ALPINE CO LTD
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