Portable-device position determination system, portable-device position determination method, and portable-device position determination apparatus

A technology for judging systems and judging devices, which is applied in measuring devices, radio wave measuring systems, services based on location information, etc., can solve problems such as portable machines being locked in cars, and achieve the effect of improving the accuracy of location judgments

Active Publication Date: 2014-02-12
OMRON AUTOMOTIVE ELECTRONICS CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0009] In addition, in the case of misjudgment whether the portable device is inside or outside the vehicle, for example, when the do...

Method used

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  • Portable-device position determination system, portable-device position determination method, and portable-device position determination apparatus
  • Portable-device position determination system, portable-device position determination method, and portable-device position determination apparatus
  • Portable-device position determination system, portable-device position determination method, and portable-device position determination apparatus

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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same code|symbol is attached|subjected to the same part or a corresponding part.

[0037] First, refer to figure 1 and figure 2 , the configuration of the portable device position determination system 100 according to the present embodiment will be described.

[0038] figure 1 It is a figure showing the structure of the position determination system 100 of a portable device. This position determination system 100 is composed of a portable device 20 held by the user and a vehicle 200 ( figure 2 ) constitutes a vehicle-mounted machine 10. The portable machine 20 is made of, for example, a FOB key. The in-vehicle device 10 performs wireless communication with the portable device 20 to determine the position of the portable device 20 relative to the vehicle 200 . The in-vehicle device 10 is an example of the "portable device position determinati...

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Abstract

A portable-device position determination system has a portable device that is configured to be possessed by a user, and an in-vehicle device that is mounted on a vehicle and conducts wireless communication with the portable device. The in-vehicle device transmits a request signal to the portable device. The portable device detects a received signal intensity of the request signal to send back the received signal intensity to the in-vehicle device. The in-vehicle device compares the received signal intensity of the request signal detected by the portable device to a threshold to determine a position of the portable device. The in-vehicle device includes a transmission controller that generates the request signal, supplies an electric power to a transmitting antenna, and transmits the request signal from the transmitting antenna, and a current detector that detects a current passed through the transmitting antenna when the request signal is transmitted.

Description

technical field [0001] The present invention relates to a technique for determining the position of a portable device in an in-vehicle device that communicates wirelessly with the portable device. Background technique [0002] In a vehicle system that automatically performs wireless communication between a portable device held by a user and an in-vehicle device mounted on the vehicle, the position of the portable device relative to the vehicle is determined in order to improve convenience. In addition, the controls for locking / unlocking the doors, starting the engine, and the like are restricted according to the position of the portable device. [0003] For example, in Patent Document 1, a plurality of antennas are provided inside and outside the vehicle. When the vehicle-mounted device drives the antenna with initial power, it detects the current flowing through the antenna, and sets the power value supplied to the antenna based on the current value to generate a magnetic ...

Claims

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Application Information

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IPC IPC(8): G01S1/10B60R25/24H04W4/021H04W4/40
CPCB60R25/245H04W4/021H04W4/40
Inventor 结束健一西口直男安田丰植田雄祐山下收司
Owner OMRON AUTOMOTIVE ELECTRONICS CO LTD
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