Title:
VEHICLE-MOUNTED COMMUNICATION SYSTEM, VEHICLE-MOUNTED DEVICE AND PORTABLE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/047748
Kind Code:
A1
Abstract:
Provided is an on-vehicle communication system, an on-vehicle device and a portable apparatus. This on-vehicle device is provided with: an on-vehicle side transmitting part which alternately two kinds of detection signals having phases different by 180 degrees; an on-vehicle side receiving part which receives a response signal transmitted from a portable apparatus with respect to the detection signal transmitted by the on-vehicle side transmitting part; and a position detection part which detects the position of the portable apparatus on the basis of the response signal received from the on-vehicle side receiving part. The portable apparatus is provided with: a portable apparatus-side receiving part which receives the two kinds of detecting signals transmitted from the on-vehicle transmitting part; a subtraction part which subtracts one from the other of the two kinds of received detecting signals; a calculation part which, on the basis of the signal obtained through the subtraction by the subtraction part, calculates signal intensities of the detecting signals received by the portable apparatus-side receiving part; and a portable apparatus-side transmitting part which transmits a response signal including information about the signal intensities calculated by the calculation part.
Inventors:
MIYAWAKI DAISUKE (JP)
Application Number:
PCT/JP2017/031685
Publication Date:
March 15, 2018
Filing Date:
September 04, 2017
Export Citation:
Assignee:
AUTONETWORKS TECHNOLOGIES LTD (JP)
SUMITOMO WIRING SYSTEMS (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)
SUMITOMO WIRING SYSTEMS (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
G01S13/74; B60R25/24; E05B49/00; H04B1/3822
Domestic Patent References:
| WO2015145497A1 | 2015-10-01 | |||
| WO2014033975A1 | 2014-03-06 |
Foreign References:
| JPH11122317A | 1999-04-30 | |||
| JP2012237103A | 2012-12-06 | |||
| JP2010181295A | 2010-08-19 | |||
| JP2013068033A | 2013-04-18 | |||
| JP2014123434A | 2014-07-03 | |||
| JP2012145506A | 2012-08-02 | |||
| US20110102138A1 | 2011-05-05 |
Attorney, Agent or Firm:
KOHNO, Hideto et al. (JP)
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