KR102607816B1 - 무인항공기용 충전장치 및 제어방법 - Google Patents
무인항공기용 충전장치 및 제어방법 Download PDFInfo
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- KR102607816B1 KR102607816B1 KR1020210145366A KR20210145366A KR102607816B1 KR 102607816 B1 KR102607816 B1 KR 102607816B1 KR 1020210145366 A KR1020210145366 A KR 1020210145366A KR 20210145366 A KR20210145366 A KR 20210145366A KR 102607816 B1 KR102607816 B1 KR 102607816B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U50/00—Propulsion; Power supply
- B64U50/30—Supply or distribution of electrical power
- B64U50/37—Charging when not in flight
- B64U50/38—Charging when not in flight by wireless transmission
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C39/00—Aircraft not otherwise provided for
- B64C39/02—Aircraft not otherwise provided for characterised by special use
- B64C39/024—Aircraft not otherwise provided for characterised by special use of the remote controlled vehicle type, i.e. RPV
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/24—Aircraft characterised by the type or position of power plants using steam or spring force
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D45/00—Aircraft indicators or protectors not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U50/00—Propulsion; Power supply
- B64U50/10—Propulsion
- B64U50/19—Propulsion using electrically powered motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U50/00—Propulsion; Power supply
- B64U50/30—Supply or distribution of electrical power
- B64U50/34—In-flight charging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/10—Air crafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U2101/00—UAVs specially adapted for particular uses or applications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U2201/00—UAVs characterised by their flight controls
- B64U2201/10—UAVs characterised by their flight controls autonomous, i.e. by navigating independently from ground or air stations, e.g. by using inertial navigation systems [INS]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/50—On board measures aiming to increase energy efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- General Physics & Mathematics (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
Description
본 발명은 송전선로의 고장을 감시하는 무인항공기용 충전장치 제어방법에 있어서, 무인항공기의 배터리 소모량 예측 및 비행경로에 충전소 추가 단계; 상기 무인항공기의 배터리 잔량과 예측 소모량 비교 단계; 비행경로 수정 단계; 및 충전소로 이동 및 착륙 단계;를 포함하고, 상기 충전소로 이동 및 착륙 단계에서 상기 충전소는 송전철탑 위에 설치되며, 상기 비행경로 수정 단계는 현재 상기 무인항공기의 배터리 잔량이 상기 예측 소모량보다 큰 경우에는 설정된 비행경로를 따라 비행하고, 현재 상기 무인항공기의 배터리 잔량이 상기 예측 소모량보다 작은 경우에는 무선충전장치가 설치된 경로점을 다음 경로점으로 수정하고 무선충전이 이루어진 후 상기 설정된 비행경로대로 비행한다. 여기서 상기 충전소는 충전부에서 충전이 진행되는 무선충전장치가 있고, 상기 충전부는 태양광 방식 내지 송전선로 전류 방식 중 어느 한 방식으로 상기 무선충전장치에서 전원공급부의 배터리로부터 전원을 공급받으며, 상기 태양광 방식은 태양광 모듈을 통해 광전효과에 의한 광기전력을 이용하고, 상기 송전선로 전류 방식은 CT변류기를 통해 상기 송전선로 전류를 변류시켜 이용하며, 상기 태양광 방식으로 전원공급이 불가능할 경우에는 상기 송전선로 전류 방식으로 전원공급이 진행된다.
도 2는 본 발명에 따른 무선 충전장치의 순서도이다.
도 3은 본 발명에 따른 대체 충전소 안내시의 경로 변경의 예시이다.
도 4는 본 발명에 따른 대용량 배터리(106-3) 충전의 순서도이다.
도 5는 본 발명에 따른 무인항공기 배터리의 잔량 부족 시 경로 변경의 예시이다.
도 6은 본 발명에 따른 무선충전지점을 보여주는 그림이다.
도 7은 본 발명에 따른 무인항공기의 배터리장치 구성도이다.
도 8은 본 발명에 따른 무인항공기의 무선충전장치의 구성도이다.
도 9는 본 발명에 따른 무선충전장치의 전원공급부의 구성도이다.
도 10은 본 발명에 따른 무인항공기의 충전방식의 개념도이다.
101 : 무선충전장치 제어부
102 : 무선 송/수신부
103 : GPS장치
104 : 상태표시부
105 : 충전부
106 : 전원공급부
106-1 : SOLAR CELL
106-2 : 전력변환장치
106-3 : 대용량 배터리
107 : DB구축부
200 : CT 변류기
301 : 무인항공기의 배터리
302 : 배터리 제어부
303 : GPS장치/ RFID장치
304 : 무선송/수신부
305 : 무인항공기 제어부
306 : 무선 충전부
Claims (1)
- 송전선로의 고장을 감시하는 무인항공기용 충전장치 제어방법에 있어서,
무인항공기의 배터리 소모량 예측 및 비행경로에 충전소 추가 단계;
상기 무인항공기의 배터리 잔량과 예측 소모량 비교 단계;
비행경로 수정 단계; 및
충전소로 이동 및 착륙 단계;를 포함하고,
상기 충전소로 이동 및 착륙 단계에서 상기 충전소는 송전철탑 위에 설치되며,
상기 비행경로 수정 단계는,
현재 상기 무인항공기의 배터리 잔량이 상기 예측 소모량보다 큰 경우에는 설정된 비행경로를 따라 비행하고,
현재 상기 무인항공기의 배터리 잔량이 상기 예측 소모량보다 작은 경우에는 무선충전장치가 설치된 경로점을 다음 경로점으로 수정하고 무선충전이 이루어진 후 상기 설정된 비행경로대로 비행하며,
상기 충전소는 충전부에서 충전이 진행되는 무선충전장치가 있고,
상기 무선충전장치는 무인항공기의 착륙신호가 잡히면 상기 무선충전장치에서 전원공급부의 배터리 잔량과 충전부의 동작여부를 확인하여 충전 가능여부를 판단하고, 충전이 불가능하다고 판단될 경우에는 소속 기관에 문제 신호를 발신한 후 대체 충전소로 안내하며,
상기 충전부는 태양광 방식 내지 송전선로 전류 방식 중 어느 한 방식으로 상기 무선충전장치에서 전원공급부의 배터리로부터 전원을 공급받으며,
상기 태양광 방식은 태양광 모듈을 통해 광전효과에 의한 광기전력을 이용하고,
상기 송전선로 전류 방식은 CT변류기를 통해 상기 송전선로 전류를 변류시켜 이용하며,
상기 태양광 방식으로 전원공급이 불가능할 경우에는 상기 송전선로 전류 방식으로 전원공급이 진행되는 것을 특징으로 하는 무인항공기용 충전장치 제어방법.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020210145366A KR102607816B1 (ko) | 2016-09-21 | 2021-10-28 | 무인항공기용 충전장치 및 제어방법 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160120789A KR102338271B1 (ko) | 2016-09-21 | 2016-09-21 | 무인항공기용 충전장치 및 제어방법 |
| KR1020210145366A KR102607816B1 (ko) | 2016-09-21 | 2021-10-28 | 무인항공기용 충전장치 및 제어방법 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020160120789A Division KR102338271B1 (ko) | 2016-09-21 | 2016-09-21 | 무인항공기용 충전장치 및 제어방법 |
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| Publication Number | Publication Date |
|---|---|
| KR20210134547A KR20210134547A (ko) | 2021-11-10 |
| KR102607816B1 true KR102607816B1 (ko) | 2023-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020160120789A Active KR102338271B1 (ko) | 2016-09-21 | 2016-09-21 | 무인항공기용 충전장치 및 제어방법 |
| KR1020210145365A Ceased KR20210134546A (ko) | 2016-09-21 | 2021-10-28 | 무인항공기용 충전장치 및 제어방법 |
| KR1020210145367A Active KR102607817B1 (ko) | 2016-09-21 | 2021-10-28 | 무인항공기용 충전장치 및 제어방법 |
| KR1020210145366A Active KR102607816B1 (ko) | 2016-09-21 | 2021-10-28 | 무인항공기용 충전장치 및 제어방법 |
| KR1020210146383A Ceased KR20210135173A (ko) | 2016-09-21 | 2021-10-29 | 무인항공기용 충전장치 및 제어방법 |
| KR1020210146382A Ceased KR20210135172A (ko) | 2016-09-21 | 2021-10-29 | 무인항공기용 충전장치 및 제어방법 |
| KR1020210146384A Active KR102487381B1 (ko) | 2016-09-21 | 2021-10-29 | 무인항공기용 충전장치 및 제어방법 |
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| KR1020160120789A Active KR102338271B1 (ko) | 2016-09-21 | 2016-09-21 | 무인항공기용 충전장치 및 제어방법 |
| KR1020210145365A Ceased KR20210134546A (ko) | 2016-09-21 | 2021-10-28 | 무인항공기용 충전장치 및 제어방법 |
| KR1020210145367A Active KR102607817B1 (ko) | 2016-09-21 | 2021-10-28 | 무인항공기용 충전장치 및 제어방법 |
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| KR1020210146382A Ceased KR20210135172A (ko) | 2016-09-21 | 2021-10-29 | 무인항공기용 충전장치 및 제어방법 |
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| KR102181081B1 (ko) * | 2018-04-27 | 2020-11-20 | 한국전력공사 | 드론의 전원 공급 장치 및 방법 |
| CN109062247A (zh) * | 2018-07-28 | 2018-12-21 | 深圳市烽焌信息科技有限公司 | 一种无人机基站的进入方法 |
| KR102032722B1 (ko) * | 2018-09-04 | 2019-10-16 | 주식회사 아이온커뮤니케이션즈 | 드론을 이용한 태양광 패널의 검사 방법 및 시스템 |
| KR102149658B1 (ko) * | 2018-11-21 | 2020-09-02 | 한국전력공사 | 전력설비를 활용한 드론 충전 시스템, 이의 방법, 및 이 방법을 저장한 컴퓨터 판독 가능한 저장 매체 |
| CN109660028B (zh) * | 2019-01-30 | 2023-10-20 | 青岛鲁渝能源科技有限公司 | 夹紧装置以及无人机 |
| KR102152129B1 (ko) * | 2019-04-08 | 2020-09-07 | 한국전력공사 | 무선 충전 시스템 및 방법 |
| KR102122566B1 (ko) * | 2019-12-16 | 2020-06-16 | (주)프리뉴 | 드론용 전원 관리 장치 및 그 방법 |
| CN111251934B (zh) * | 2020-01-20 | 2021-04-27 | 南京大学 | 一种基于无人机无线充电的高压线路巡检调度方法 |
| CN111614161B (zh) * | 2020-05-22 | 2023-04-18 | 郑州市泰安电力建设有限公司 | 一种交流10kv输电线路远程监测方法、系统、以及存储介质 |
| CN111791722A (zh) * | 2020-08-12 | 2020-10-20 | 北京中凯晟天科技发展有限公司 | 输电线路磁感光电充电平台及包含其的输电系统 |
| CN112721667A (zh) * | 2020-12-23 | 2021-04-30 | 重庆大学 | 用于无人机无线充电的单电容耦合机构、系统及无人机 |
| CN116829405A (zh) * | 2021-01-05 | 2023-09-29 | 莱基动力公司 | 从高架电力线接入无人机的电力和数据通信 |
| CN113110601B (zh) * | 2021-04-01 | 2023-06-16 | 国网江西省电力有限公司电力科学研究院 | 一种无人机电力线路巡检路径优化方法及装置 |
| KR102541543B1 (ko) * | 2021-04-29 | 2023-06-13 | 주식회사 웨이브쓰리디 | 드론의 배터리 관리 장치 및 시스템 |
| CN113410916B (zh) * | 2021-08-20 | 2021-11-02 | 成都金迈微科技有限公司 | 一种光纤供电系统中光伏功率变换器的监控系统及方法 |
| CN113997803B (zh) * | 2021-10-26 | 2023-11-03 | 南京壮大智能科技研究院有限公司 | 基于非接触网无线供电的飞行器飞行控制方法 |
| KR102454726B1 (ko) * | 2021-12-21 | 2022-10-14 | 주식회사 에스테코 | 무인 비행체를 이용한 태양광 발전소 진단 방법 및 시스템 |
| KR102620458B1 (ko) * | 2022-01-27 | 2024-01-05 | 주식회사 모큐라텍 | 무인 비행체의 비행시간 향상을 위한 배터리 충방전 시스템 |
| CN114611017B (zh) * | 2022-03-03 | 2023-01-13 | 飞循智航(成都)科技有限公司 | 一种无人机蜂巢交互方法、系统、智能终端及存储介质 |
| CN115347500A (zh) * | 2022-08-24 | 2022-11-15 | 广东电网有限责任公司 | 一种输电线路的巡检方法、装置、设备及存储介质 |
| KR102912721B1 (ko) * | 2023-08-22 | 2026-01-14 | 김신 | 무인 비행체의 해상 충전 시스템 |
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| KR102338271B1 (ko) | 2021-12-14 |
| KR20210135172A (ko) | 2021-11-12 |
| KR20210134547A (ko) | 2021-11-10 |
| KR20180032075A (ko) | 2018-03-29 |
| KR20210134548A (ko) | 2021-11-10 |
| KR102607817B1 (ko) | 2023-11-30 |
| KR20210134546A (ko) | 2021-11-10 |
| KR20210135174A (ko) | 2021-11-12 |
| KR102487381B1 (ko) | 2023-01-12 |
| KR20210135173A (ko) | 2021-11-12 |
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