Title:
通信システム
Document Type and Number:
Japanese Patent JP7047393
Kind Code:
B2
Abstract:
To provide a communication system that can detect whether a radio signal received by a slave unit is a radio signal transmitted from a master unit.SOLUTION: A master unit 100 includes a master unit transmission unit 130 that simultaneously transmits radio wave signals of the same phase as synchronous radio signals from a first master unit transmission antenna 110L and a second master unit transmission antenna 10R which are mutually separated. A slave unit 200 includes a three-axis magnetic field detection unit 231 that detects, as a detected magnetic field vector, a magnetic field vector representing the magnetic field intensity at each of three axes when a radio signal is received by a slave unit-side three-axis reception antenna 210. A communication system 1 further includes a signal determination unit 300 determining that the plurality of radio signals simultaneously received by the slave unit are synchronous radio signals transmitted from the master unit when the direction of the detected magnetic field vector is constant without rotation while the plurality of radio signals are simultaneously received by the slave unit-side three-axis reception antenna.SELECTED DRAWING: Figure 1
Inventors:
Tetsuya Kusumoto
Takashi Saito
Takushi Shinoda
Takashi Saito
Takushi Shinoda
Application Number:
JP2018005686A
Publication Date:
April 05, 2022
Filing Date:
January 17, 2018
Export Citation:
Assignee:
株式会社ＳＯＫＥＮ
International Classes:
H04B1/3822; E05B49/00; H01Q21/24; H04B7/06; H04B7/08; H04Q9/00
Domestic Patent References:
| JP2015040406A | ||||
| JP2006342545A |
Foreign References:
| US20130063247 |
Attorney, Agent or Firm:
Kazuyuki Yahagi
Taihei Nonobe
Takanori Kubo
Taihei Nonobe
Takanori Kubo