RADIO

• US 20170346538A1
• Filed: 08/17/2017
• Published: 11/30/2017
• Est. Priority Date: 03/06/2015
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: SAITO, Keisuke, YOSHIKAWA, Taiji
• Granted Patent: US 10,298,303 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/005 Control of transmission; Equalising
• CPC Class Codes: H04B 7/0608 Antenna selection according to transmission parameters
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04B 7/0834 based on external parameters, e.g. subscriber speed or location
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity

Abstract

Provided is a radio formed to be capable of performing wireless communication with a sensor that measures a predetermined environmental parameter in a predetermined closed space, the radio including an antenna portion disposed in the predetermined closed space and for performing wireless communication with the sensor, and a control unit that controls a mode by which the antenna portion transmits and receives wireless radio waves such that standing waves envisaged to be formed in the predetermined closed space based on radio waves transmitted from the sensor to the antenna portion, or standing waves envisaged to be formed in the predetermined closed space based on radio waves transmitted from the antenna portion to the sensor change with the lapse of time during the wireless communication.

Claims

1. A radio formed to be capable of performing wireless communication with a sensor that measures a predetermined environmental parameter in a predetermined closed space, the radio comprising:

an antenna portion disposed in the predetermined closed space and for performing wireless communication with the sensor; and

a control unit that controls a mode by which the antenna portion transmits and receives wireless radio waves, such that standing waves envisaged to be formed in the predetermined closed space based on radio waves transmitted from the sensor to the antenna portion, or standing waves envisaged to be formed in the predetermined closed space based on radio waves transmitted from the antenna portion to the sensor change with lapse of time during the wireless communication.

2. The radio according to claim 1,

wherein the antenna portion includes a plurality of antennas that support diversity communication, and

the control unit switches an antenna that performs transmission and reception of radio waves in accordance with lapse of time such that the standing waves change with the lapse of time during the wireless communication.

3. The radio according to claim 1,

wherein the antenna portion includes a directional antenna, and

the control unit changes a directivity condition that is applied to the directional antenna in accordance with lapse of time such that the standing waves change with the lapse of time during the wireless communication.

4. The radio according to claim 3,

wherein the control unit controls the directivity condition that is applied to the directional antenna based on a received signal intensity obtained when radio waves transmitted from the sensor are received by the antenna portion.

5. The radio according to claim 1,

wherein the predetermined closed space is provided with a transparent window portion such that inside of the predetermined closed space is visible from outside of the predetermined closed space, and

the window portion is covered with a transparent metal film.

6. The radio according to claim 1,

wherein a radio wave absorbing member exhibiting a property of absorbing radio waves having a predetermined frequency used in wireless communication with the sensor is disposed on an inner wall surface of the predetermined closed space.

7. The radio according to claim 1,

wherein a predetermined processing apparatus for machining an object to be processed is disposed in the predetermined closed space, and a lubricant for machining is used during the machining by the predetermined processing apparatus.