JP-7854743-B1 - Method and system for detecting radio wave sources

JP7854743B1JP 7854743 B1JP7854743 B1JP 7854743B1JP-7854743-B1

Abstract

[Problem] To provide a method and system for detecting unknown radio wave sources for radio wave users. [Solution] The present invention relates to a detection method for detecting an unknown radio wave source using a drone. In this detection method, the peak direction θa with the greatest intensity is detected from the radio wave signal received when a drone 200A equipped with a directional receiving antenna is rotated at a known first measurement position, and the peak direction θb with the greatest intensity is detected from the radio wave signal received when a drone 200B equipped with a directional receiving antenna is rotated at a known second measurement position, and the position of the radio wave source is calculated based on the first and second measurement positions and the peak directions θa and θb. [Selection Diagram] Figure 6

Inventors

板羽昌之
郡昌弘
皆川好則
高橋　澄雄

Assignees

株式会社ｅロボティクス

Dates

Publication Date: 20260507
Application Date: 20250116

Claims (13)

A detection method for detecting an unknown radio wave source using at least a first and a second drone, At a known first measurement position, a first drone equipped with a directional antenna is rotated to measure radio signals, and based on the measurement results, the first direction in which the radio signal strength is greatest is detected. At a known second measurement location, a second drone equipped with a directional antenna is rotated to measure radio signals, and based on the measurement results, the second direction with the strongest radio signal intensity is detected. A detection method for calculating the location of a radio wave source based on first and second measurement positions and first and second azimuths.
The detection method according to claim 1, wherein the first drone and the second drone measure radio signals when they are rotated simultaneously.
The detection method according to claim 1, wherein the heights of the first measurement position and the second measurement position are equal.
The detection method according to claim 1, wherein the location of the radio wave source is calculated based on the triangulation method.
The detection method according to claim 1, wherein the first and second azimuths are the rotation angles of the first and second drones when the intensity of the received radio signal is maximized.
A detection method that uses a drone to detect unknown radio wave sources, When a drone equipped with a directional antenna is rotated at a known measurement location, the peak intensity at which the signal strength is maximum and the peak direction of that peak intensity are detected from the radio signal received by the antenna. A detection method for calculating the location of a radio wave source based on the measurement position, the peak intensity, and the peak direction.
A detection method that uses a drone to detect unknown radio wave sources, At a known first measurement location, a radio signal is measured using an omnidirectional antenna mounted on the first drone, and based on the measurement results, the first direction with the greatest radio signal strength is detected. At a known second measurement location, the radio signal is measured using an omnidirectional antenna mounted on the second drone, and based on the measurement results, the second direction with the strongest radio signal strength is detected. A detection method for calculating the location of a radio wave source based on first and second measurement positions and first and second azimuths.
A detection system for detecting unknown radio wave sources, The first drone equipped with a directional receiving antenna, A second drone equipped with a directional receiving antenna, Includes an electronic device capable of communicating with the first and second drones, The first drone detects the first direction with the greatest intensity from the radio signal received when it is rotated at a known first measurement position, and transmits the detected first direction to the electronic device. The second drone detects the second direction with the greatest intensity from the radio signal received when it is rotated at a known second measurement position, and transmits the detected second direction to the electronic device. The aforementioned electronic device is a detection system that calculates the location of a radio wave source based on first and second measurement positions and first and second received directions.
The detection system further includes N drones (where N is an integer greater than or equal to 3), Each of the N drones detects the N directions with the greatest intensity from the radio signals received when rotated at a known measurement position, and transmits the detected N directions to the electronic device. The detection system according to claim 8, wherein the electronic device calculates the position of the radio wave source based on the N directions received.
The detection system according to claim 8, wherein each of the first and second drones is equipped with an adjustment function for adjusting the angle of the receiving antenna in the Z direction.
A detection system for detecting unknown radio wave sources, A drone equipped with a directional receiving antenna, Includes an electronic device capable of communicating with the drone, The drone, at a known measurement location, detects the peak intensity and the peak direction of the signal strength from the radio signal received when the drone is rotated. The detected peak intensity and peak orientation are transmitted to the electronic device. The aforementioned electronic device is a detection system that calculates the location of a radio wave source based on the measurement position, the received peak intensity, and the peak direction.
A detection system for detecting unknown radio wave sources, The first drone equipped with an omnidirectional receiving antenna, A second drone equipped with an omnidirectional receiving antenna, Includes an electronic device capable of communicating with the first and second drones, The first drone detects the first direction with the greatest intensity from the radio signal measured at a known first measurement position, and transmits the detected first direction to the electronic device. The second drone detects the second direction with the greatest intensity from the radio signal measured at a known second measurement position, and transmits the detected second direction to the electronic device. The aforementioned electronic device is a detection system that calculates the location of a radio wave source based on first and second measurement positions and first and second received directions.
The detection system further includes N drones (where N is an integer greater than or equal to 3), Each of the N drones detects the N directions with the greatest intensity from the radio signals measured at a known measurement location, and transmits the detected N directions to the electronic device. The detection system according to claim 12, wherein the electronic device calculates the position of the radio wave source based on the N directions received.

Description

This invention relates to the detection of unknown radio wave sources using remotely controlled or autonomously piloted unmanned aerial vehicles or aircraft (hereinafter referred to as "drones"). In recent years, drones have been used for inspecting structures (such as transmission towers and power lines), delivering goods, spraying pesticides and fertilizers, and reconnaissance. Drones generally include components such as batteries, motors, propellers, receivers, and flight controllers. The flight controller drives the propellers via the motors based on instructions (radio waves) received from the transmitter by the receiver, thereby controlling the aircraft's attitude and speed. For example, Patent Document 1 discloses a radio wave measurement system that uses an aerial mobile device such as a drone to measure radio waves radiated by an antenna with high precision while eliminating the effects of multipath and other factors. Patent Document 2 discloses a wireless relay device that mounts a relay station on a drone and transmits radio waves from a directional antenna toward the ground. Japanese Patent Publication No. 2020-79786Japanese Patent Publication No. 2022-83243 This figure shows the overall configuration of a radio wave source detection system using a drone according to an embodiment of the present invention.This is a block diagram showing the electrical configuration of a radio wave source detection system using a drone according to an embodiment of the present invention.This figure shows an example configuration of a detection system according to the first embodiment of the present invention.This diagram shows the operation flow of the detection system according to the first embodiment of the present invention.This diagram schematically shows the peak direction at which the strength of the received radio signal is maximum.This figure shows an example of calculating the position of a radio wave source using trigonometry according to the first embodiment of the present invention.This figure shows an example of storing the detection results of a radio wave source according to the first embodiment of the present invention.This figure shows an example of calculating a radio wave source by modifying the first embodiment of the present invention.This figure shows an example configuration of a detection system according to a second embodiment of the present invention.This diagram shows the operation flow of the detection system according to a second embodiment of the present invention.This figure shows an example of calculating the location of a radio wave source according to a second embodiment of the present invention.This figure shows an example configuration of a detection system according to a third embodiment of the present invention. This invention relates to a system for detecting unknown radio wave sources using a drone. It should be noted that the drawings referenced in the following description are exaggerated for the sake of easier understanding of the invention and do not directly represent the size or shape of actual products or parts.