Smart entry system

A smart entry and portable technology, applied in single input/output port registers, electric locks, time registers, etc., can solve the problems of changes in electric field strength and inaccurate detection and use of portable unit distances

Inactive Publication Date: 2009-04-22
DENSO CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the vehicle is likely to be used by unauthorized users
[0010] Besides, although the user's departure from the vehicle is detected based on the electric field strength of the signal of that portable unit carried by the user, the electric field strength changes due to the influence of the way the portable unit is held due to the directionality of the electric field.
Thus, the distance from the vehicle to the portable unit cannot be accurately detected
Then, since the electric field strength is used, the operation cannot be performed accurately

Method used

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Embodiment Construction

[0024] Referring first to FIG. 1 , the smart entry system includes a main portable unit 1 carried by a user such as a vehicle driver, an equipped sub-portable unit 2 installed in a vehicle V ( FIGS. 2 and 3 ), and an on-vehicle device installed on the side of the vehicle. 3.

[0025] The main portable unit 1 has an identification code (ID code) that is unique to each vehicle V, and has a function of storing a frame of the identification code when an identification code transmission request is issued from the vehicle-mounted device 3 to check the identification code. is sent to the in-vehicle device 3. This function changes according to the form of the smart entry system. For example, a frame storing an identification code is transmitted from the main portable unit 1 side at a constant cycle so that the identification code is notified to the vehicle-mounted device 3 as a response signal, so that checking of the identification code can be performed. The main portable unit 1 al...

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Abstract

When a master portable unit (1) exists inside a vehicle compartment and a sub-portable unit (2) exists outside the vehicle compartment, master portable unit disable control is performed and door lock control is performed. Thus, even if the master portable unit (1) put in a bag or a jacket is not taken out, the door can be locked. Accordingly, when the user holds the sub-portable unit and goes out of the vehicle compartment while leaving the master portable unit (1) in the vehicle compartment, locking can be performed. Further, even if an unauthorized user breaks the glass and enters the vehicle compartment when the user carries the sub-portable unit (2) and exists outside the vehicle, operations such as starting an engine by using the master portable unit (1) can be disabled.

Description

technical field [0001] The present invention relates to a smart entry system in which door lock control, door unlock control, etc. are performed when a user carrying a portable unit gets in or gets out of a car. Background technique [0002] A conventional smart entry system performs door lock and door unlock control based on communication between a portable unit carried by a user and a transmitter / receiver installed in a vehicle. [0003] In such a smart entry system, a transmitter / receiver device installed in a vehicle communicates with a portable unit carried by a user to cause the portable unit to send back a response signal including an identification code. The transmitter / receiver device receives a signal including the identification code through a receiving antenna installed in the vehicle for communicating with the outside of the cabin. When the signal is received, the door lock is allowed to be released. Door unlocking is performed when a user or passenger actuall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E05B49/00E05B65/12B60R25/01B60R25/10B60R25/104B60R25/24B60R25/30B60R25/34E05B83/36
CPCG07C2209/63G07C2009/00793G07C9/00309B60R25/245
Inventor 荻野健一手嶋健太郎中岛和洋
Owner DENSO CORP
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