Detecting system, detecting apparatus, detecting method, and program

Patent metadata

Field	Value
Publication number	US-2024256801-A1
Application number	US-202118289689-A
Country	US
Kind code	A1
Filing date	May 17, 2021
Priority date	May 17, 2021
Publication date	Aug 1, 2024
Grant date	—

Abstract

A detecting system includes a tag, a radar device that transmits transmission radio waves to the tag and acquires reception radio waves produced by the transmission radio waves being reflected by the tag, and a detecting apparatus. The tag includes a pattern made of a plurality of materials that reflect or scatter radio waves received from the radar device, and the pattern includes a known pattern known to the detecting apparatus and an unknown pattern unknown to the detecting apparatus. The detecting apparatus includes a specifying unit that calculates a relative velocity between the radar device and the tag, with which the known pattern can be detected from the reception radio waves, and specifies a condition for the radar device to transmit transmission radio waves for estimating the unknown pattern, from the calculated relative velocity, and a notification unit that notifies the radar of the specified condition.

First claim

1 . A detecting system comprising:
a tag; a radar device, comprising one or more processors, configured to transmit transmission radio waves to the tag and to acquire reception radio waves produced by the transmission radio waves being reflected by the tag; and a detecting apparatus connected to the radar device, wherein the tag includes a pattern made of a plurality of materials that reflect or scatter radio waves received from the radar device, the pattern including a known pattern known to the detecting apparatus and an unknown pattern unknown to the detecting apparatus, the detecting apparatus includes a specifying unit, comprising one or more processors, configured to calculate a relative velocity between the radar device and the tag, with which the known pattern can be detected from the reception radio waves, and to specify a condition for the radar device to transmit transmission radio waves for estimating the unknown pattern, from the calculated relative velocity, and a notification unit, comprising one or more processors, configured to notify the radar device of the specified condition, and the radar device transmits the transmission radio waves to the tag under the condition.

2 . The detecting system according to claim 1 , wherein
the detecting apparatus further includes an estimation unit, comprising one or more processors, configured to estimate the unknown pattern from reception radio waves for the transmission radio waves transmitted under the condition.

3 . The detecting system according to claim 1 , wherein
if the tag is fixed, the relative velocity calculated by the specifying unit is a velocity of the radar device.

4 . The detecting system according to claim 1 , wherein
if the tag moves, the specifying unit further acquires a velocity of the radar device, and calculates a velocity of the tag from the acquired velocity of the radar device and the relative velocity.

5 . The detecting system according to claim 4 , wherein
if the tag floats in an environment, a velocity of the tag is a movement velocity of the environment in which the tag is located.

6 . A detecting apparatus comprising:
a specifying unit, comprising one or more processors, configured to calculate a relative velocity between a radar device and a tag, with which a known pattern can be detected from reception radio waves produced by transmission radio waves from the radar device being reflected or scattered, the tag including a pattern made of a plurality of materials that reflect or scatter received radio waves, the pattern including a known pattern known to the detecting apparatus and an unknown pattern unknown to the detecting apparatus, and to specify a condition for the radar device to transmit transmission radio waves for estimating the unknown pattern, from the calculated relative velocity; and a notification unit, comprising one or more processors, configured to notify the radar device of the specified condition.

7 . A detecting method in a detecting system including a tag, a radar device that transmits transmission radio waves to the tag and acquires reception radio waves produced by the transmission radio waves being reflected by the tag, and a detecting apparatus connected to the radar device, in which the tag including a pattern made of a plurality of materials that reflect or scatter radio waves received from the radar device, the pattern including a known pattern known to the detecting apparatus and an unknown pattern unknown to the detecting apparatus, the detecting method comprising:
the detecting apparatus calculating a relative velocity between the radar device and the tag, with which the known pattern can be detected from the reception radio waves, and specifying a condition for the radar device to transmit transmission radio waves for estimating the unknown pattern, from the calculated relative velocity; the detecting apparatus notifying the radar device of the specified condition; and the radar device transmitting transmission radio waves to the tag under the condition.

8 . A non-transitory, computer-readable medium storing one or more instructions executable by a computer to perform operations as the detecting apparatus according to claim 6 .

Assignees

• Nippon Telegraph & Telephone

Inventors

• Iizuka Tatsuya
• Itami Go
• Kosaka Naoko
• Maruyama Masato
• Tanaka Toshimitsu
• Kato Jun

Classifications

• G01S13/90

  using synthetic aperture techniques {, e.g. synthetic aperture radar [SAR] techniques} · CPC title

• G06K7/10009 Primary

  sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves · CPC title

• G01S13/583

  using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets · CPC title

• G01S7/025

  involving the transmission of linearly polarised waves · CPC title

• G06K7/08

  by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes · CPC title