{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,17]],"date-time":"2026-01-17T09:35:29Z","timestamp":1768642529251,"version":"3.49.0"},"reference-count":55,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2019,2,3]],"date-time":"2019-02-03T00:00:00Z","timestamp":1549152000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the National Key Research and Development Plan, China","award":["2016YFD0200700"],"award-info":[{"award-number":["2016YFD0200700"]}]},{"name":"the 111 Project","award":["D18019"],"award-info":[{"award-number":["D18019"]}]},{"name":"the Science and Technology Planning Project of Guangdong Province, China","award":["2017B010117010"],"award-info":[{"award-number":["2017B010117010"]}]},{"name":"the Science and Technology Planning Project of Guangzhou city, China","award":["201807010039"],"award-info":[{"award-number":["201807010039"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>With the steady progress of China\u2019s agricultural modernization, the demand for agricultural machinery for production is widely growing. Agricultural unmanned aerial vehicles (UAVs) are becoming a new force in the field of precision agricultural aviation in China. In those agricultural areas where ground-based machinery have difficulties in executing farming operations, agricultural UAVs have shown obvious advantages. With the development of precision agricultural aviation technology, one of the inevitable trends is to realize autonomous identification of obstacles and real-time obstacle avoidance (OA) for agricultural UAVs. However, the complex farmland environment and changing obstacles both increase the complexity of OA research. The objective of this paper is to introduce the development of agricultural UAV OA technology in China. It classifies the farmland obstacles in two ways and puts forward the OA zones and related avoidance tactics, which helps to improve the safety of aviation operations. This paper presents a comparative analysis of domestic applications of agricultural UAV OA technology, features, hotspot and future research directions. The agricultural UAV OA technology of China is still at an early development stage and many barriers still need to be overcome.<\/jats:p>","DOI":"10.3390\/s19030642","type":"journal-article","created":{"date-parts":[[2019,2,5]],"date-time":"2019-02-05T11:31:07Z","timestamp":1549366267000},"page":"642","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":77,"title":["Applications and Prospects of Agricultural Unmanned Aerial Vehicle Obstacle Avoidance Technology in China"],"prefix":"10.3390","volume":"19","author":[{"given":"Linlin","family":"Wang","sequence":"first","affiliation":[{"name":"College of Engineering, South China Agricultural University, Guangzhou 510642, China"},{"name":"National Center for International Collaboration Research on Precision Agricultural Aviation Pesticides Spraying Technology, Guangzhou 510641, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yubin","family":"Lan","sequence":"additional","affiliation":[{"name":"College of Engineering, South China Agricultural University, Guangzhou 510642, China"},{"name":"National Center for International Collaboration Research on Precision Agricultural Aviation Pesticides Spraying Technology, Guangzhou 510641, China"},{"name":"Department of Biological and Agricultural Engineering, Texas A&amp;M University, College Station, TX 77845, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yali","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Engineering, South China Agricultural University, Guangzhou 510642, China"},{"name":"National Center for International Collaboration Research on Precision Agricultural Aviation Pesticides Spraying Technology, Guangzhou 510641, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9781-6086","authenticated-orcid":false,"given":"Huihui","family":"Zhang","sequence":"additional","affiliation":[{"name":"USDA, United States Department of Agriculture, Agricultural Research Service, Water Management Research Unit, 2150 Center Ave, Building D, Suite 320, Fort Collins, CO 80526-8119, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6495-5039","authenticated-orcid":false,"given":"Muhammad Naveed","family":"Tahir","sequence":"additional","affiliation":[{"name":"Department of Agronomy, PMAS-Arid Agriculture University, Rawalpindi 46300, Pakistan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shichao","family":"Ou","sequence":"additional","affiliation":[{"name":"Supernode Innovative Technology Co., Ltd, Shenzhen 518059, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaotao","family":"Liu","sequence":"additional","affiliation":[{"name":"Supernode Innovative Technology Co., Ltd, Shenzhen 518059, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3103-3254","authenticated-orcid":false,"given":"Pengchao","family":"Chen","sequence":"additional","affiliation":[{"name":"College of Engineering, South China Agricultural University, Guangzhou 510642, China"},{"name":"National Center for International Collaboration Research on Precision Agricultural Aviation Pesticides Spraying Technology, Guangzhou 510641, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,2,3]]},"reference":[{"key":"ref_1","unstructured":"National Center for International Collaboration Research on Precision Agricultural Aviation Pesticides Spraying Technology (2017). Development Situation Analysis and Policy Recommendations on China\u2019s Agricultural Plant Protection Unmanned Aircraft 2016, South China Agricultural University. Internal Report."},{"key":"ref_2","first-page":"53","article-title":"China Current Status and Future Trends of Agricultural Aerial Spraying Technology in China","volume":"10","author":"Zhang","year":"2014","journal-title":"Trans. Chin. Soc. Agric. Mach."},{"key":"ref_3","unstructured":"(2017, October 27). The State Council of the People\u2019s Republic of China, Available online: http:\/\/www.gov.cn\/zhuanti\/2017-10\/27\/content_5234876.htm."},{"key":"ref_4","unstructured":"Lou, S., Xue, X., Gu, W., Cui, L., Zhou, Q., and Wang, X. (2017). Current Status and Trends of Agricultural Plant Protection Unmanned Aerial Vehicle. J. Agric. Mech. Res., 12, (In Chinese)."},{"key":"ref_5","first-page":"40","article-title":"Effect of spray parameters of small unmanned helicopter on distribution regularity of droplet deposition in hybrid rice canopy","volume":"17","author":"Chen","year":"2016","journal-title":"Trans. Chin. Soc. Agric. Eng. (Trans. CSAE)"},{"key":"ref_6","first-page":"17","article-title":"Development Situation and Prospect of Plant Protection UAV Industry in China","volume":"38","author":"Lan","year":"2018","journal-title":"Agric. Eng. Technol."},{"key":"ref_7","first-page":"18","article-title":"Recent development of unmanned aerial vehicle for plant protection in East Asia","volume":"10","author":"He","year":"2017","journal-title":"Int. J. Agric. Biol. Eng."},{"key":"ref_8","unstructured":"(2017, September 18). The Joint Circular of the General Offices of MOA, MOF and the Civil Aviation Administration of China on Launching Pilot Programs of Farm Machinery Purchase Subsidy for Standard Operation of Plant Protection Drone, (In Chineses)."},{"key":"ref_9","unstructured":"(2018, March 15). The General Offices of MOA and MOF on Launching Guidance for the Implementation of Agricultural Machinery Purchase Subsidies (2018-2020), (In Chineses)."},{"key":"ref_10","unstructured":"(2017, December 14). Three-Year Action Plan of MIIT to Promote the Development of a New Generation of Artificial Intelligence Industry (2018-2020). Ministry of Industry and Information Technology of the People\u2019s Republic of China, Available online: http:\/\/www.miit.gov.cn\/n1146285\/n1146352\/n3054355\/n3057497\/n3057498\/c5960779\/content.html."},{"key":"ref_11","unstructured":"(2018, August 14). Guangdong Province\u2019s New Generation of Artificial Intelligence Development Plan, Available online: http:\/\/www.gd.gov.cn\/gzhd\/zcjd\/201808\/t20180814_274320.htm."},{"key":"ref_12","unstructured":"(2012, May 22). Stereo Vision: Algorithms and Applications. Available online: http:\/\/citeseerx.ist.psu.edu\/viewdoc\/summary?doi=10.1.1.368.1660."},{"key":"ref_13","first-page":"82","article-title":"Evaluation and test of effective spraying width of aerial spraying on plant protection UAV","volume":"7","author":"Chen","year":"2017","journal-title":"Trans. Chin. Soc. Agric. Eng."},{"key":"ref_14","first-page":"54","article-title":"Testing method of spatial pesticide spraying deposition quality balance for unmanned aerial1 vehicle","volume":"11","author":"Wang","year":"2016","journal-title":"Trans. Chin. Soc. Agric. Eng."},{"key":"ref_15","first-page":"86","article-title":"Design and Test of Dynamic Variable Spraying System of Plant Protection UAV","volume":"5","author":"Wang","year":"2017","journal-title":"Trans. Chin. Soc. Agric. Mach."},{"key":"ref_16","first-page":"1","article-title":"Current status and future trends of precision agricultural aviation technologies","volume":"10","author":"Lan","year":"2017","journal-title":"Int. J. Agric. Biol. Eng."},{"key":"ref_17","unstructured":"Wang, Z., Lan, Y., Clint, H.W., Wang, Y., and Zheng, Y. (2013, January 21\u201324). Low Altitude and Multiple Helicopter Formation in Precision Aerial Agriculture. Proceedings of the 2013 ASABE Annual International Meeting, Kansas, MO, USA."},{"key":"ref_18","unstructured":"Lu, L., Geng, Z., Bian, Y., Gao, B., and Song, X. (2017, January 23\u201325). Application of Agricultural plant protection UAV based on BDS-RTK. Proceedings of the 8th China Satellite Navigation Conference, Shanghai, China. (In Chinese with English abstract)."},{"key":"ref_19","first-page":"207","article-title":"Localization and Obstacle Avoidance Control of Agricultural Robot Based on DSP and Ultrasonic Distance Measurement","volume":"8","author":"Wang","year":"2017","journal-title":"J. Agric. Mech. Res."},{"key":"ref_20","first-page":"369","article-title":"Research of Small Blind Zone Ultrasonic Ranging Method Based on Natural Vibration Restraining","volume":"2","author":"Cheng","year":"2015","journal-title":"J. Vib. Meas. Diagn."},{"key":"ref_21","unstructured":"Ma, D., and Shen, H. (2004). Handbook of Acoustic, Science Press. [Revised ed.]."},{"key":"ref_22","first-page":"3209","article-title":"Based on Laser Ranging Method Research of UAV Terrain Matching Flight","volume":"9","author":"Wen","year":"2015","journal-title":"Comput. Meas. Control"},{"key":"ref_23","unstructured":"Zhao, H., Liu, Y., Zhu, X., Zhao, Y., and Zha, H. (2010, January 3\u20137). Scene understanding in a large dynamic environment through a laser-based sensing. Proceedings of the 2010 IEEE International Conference on Robotics and Automation, Anchorage, AK, USA."},{"key":"ref_24","unstructured":"Kobayashi, Y. (2019, February 03). Laser Range Finder. Available online: https:\/\/patentimages.storage.googleapis.com\/f9\/29\/e6\/2989793b56f09f\/USD723080.pdf."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1080\/10095020.2015.1017913","article-title":"A study of projections for key point based registration of panoramic terrestrial 3D laser scan","volume":"18","author":"Houshiar","year":"2015","journal-title":"Geo-Spatial Inf. Sci."},{"key":"ref_26","unstructured":"Zhou, L. (2012). Scene Measurement in UAV Navigation Based on Stereo Vision and Laser Scanning. [Master\u2019s Thesis, Nanjing University of Aeronautics and Astronautics]. (In Chinese with English abstract)."},{"key":"ref_27","first-page":"109","article-title":"Passive ranging method based on infrared images","volume":"1","author":"Huang","year":"2007","journal-title":"Infrared Laser Eng."},{"key":"ref_28","first-page":"2680","article-title":"Infrared three-color passive ranging by colorimetric method","volume":"12","author":"Lu","year":"2012","journal-title":"Opt. Precis. Eng."},{"key":"ref_29","first-page":"56","article-title":"Helicopter Pods-based Obstacle Avoidance Technology Using Infrared Imaging and Radar","volume":"29","author":"Wang","year":"2014","journal-title":"Sci. Technol. Innov. Her."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"510","DOI":"10.1109\/JSEN.2014.2346152","article-title":"Feature Matching with an Adaptive Optical Sensor in a Ground Target Tracking System","volume":"15","author":"Uzkent","year":"2015","journal-title":"IEEE Sens. J."},{"key":"ref_31","unstructured":"Zhu, L. (2016). Sense and Avoid Technology for Unmanned Aircraft Vehicles. [Ph.D. Thesis, Southeast University]. (In Chinese with English abstract)."},{"key":"ref_32","first-page":"51","article-title":"3D environment restructure method with structured light for indoor vision\/inertial navigation","volume":"1","author":"Wang","year":"2016","journal-title":"J. Chin. Inert. Technol."},{"key":"ref_33","unstructured":"Liu, Y. (2015). Research on Robotic Structured Light Vision System Calibration. [PhD\u2019s Thesis, Beijing Institute of Technology]. (In Chinese with English abstract)."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"035202","DOI":"10.1088\/0957-0233\/21\/3\/035202","article-title":"Radio frequency (RF) time-of-flight ranging for wireless sensor networks","volume":"21","author":"Thorbjornsen","year":"2010","journal-title":"Meas. Sci. Technol."},{"key":"ref_35","unstructured":"Steven, L., David, T.L., and Kristofer, S.J.P. (2006, January 30). RF Time of Flight Ranging for Wireless Sensor Network Localization. Proceedings of the International Workshop on Intelligent Solutions in Embedded Systems, Vienna, Austria."},{"key":"ref_36","unstructured":"(2016, December 12). Small Civil Millimeter-Wave Radar and Its Application. Available online: https:\/\/www.leiphone.com\/news\/201612\/owHDk93xVS9g1gUC.html."},{"key":"ref_37","unstructured":"Ding, L., Geng, F., and Chen, J. (2014). Radar Principles, Publishing House of Electronics Industry. [5th ed.]."},{"key":"ref_38","doi-asserted-by":"crossref","unstructured":"Rankin, G., Tirkel, A., and Leukhin, A. (2015, January 24\u201326). Millimeter wave array for UAV imaging MIMO radar. Proceedings of the IEEE 16th International Radar Symposium (IRS), Dresden, Germany.","DOI":"10.1109\/IRS.2015.7226217"},{"key":"ref_39","unstructured":"Wan, Y., and Liu, J. (2018). A UAV Obstacle Avoidance System Based on Millimeter Wave Radar. (CN107,678,030A), China Patent."},{"key":"ref_40","unstructured":"Chu, H. (2015). Analysis and Research of 24 GHz Automotive Radar System and the Key Techniques of the Frequency Source. [Master\u2019s Thesis, Harbin Institute of Technology]. (In Chinese with English abstract)."},{"key":"ref_41","unstructured":"Xiang, J., and Zhang, M. (2005). Millimeter-Wave Radar and Its Applications, National Defense Industry Press."},{"key":"ref_42","unstructured":"Han, X. (2016). Research on Autonomous Obstacle Avoidance Algorithm for UAV Based on Monocular Vision. [Master\u2019s Thesis, Harbin Engineering University]. (In Chinese with English abstract)."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1330","DOI":"10.1109\/34.888718","article-title":"A flexible new technique for camera calibration","volume":"22","author":"Zhang","year":"2000","journal-title":"IEEE Trans. Pattern Anal. Mach. Intel."},{"key":"ref_44","first-page":"1110","article-title":"Monocular vision system for distance measurement based on feature points","volume":"5","author":"Han","year":"2011","journal-title":"Opt. Precis. Eng."},{"key":"ref_45","first-page":"673","article-title":"Obstacle detection for unmanned aerial vehicle based in monocular vision","volume":"6","author":"Zhang","year":"2009","journal-title":"Laser Infrared"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"2232","DOI":"10.3788\/OPE.20142208.2232","article-title":"Obstacle avoidance algorithm based on monocular vision for quad-rotor helicopter","volume":"8","author":"Zhao","year":"2014","journal-title":"Opt. Precis. Eng."},{"key":"ref_47","unstructured":"Su, D. (2014). Navigation and Obstacle Avoidance for Miniature UAV Based on Binocular Stereo Vision. [Master\u2019s Thesis, University of Electronic Science and Technology of China]. (In Chinese with English abstract)."},{"key":"ref_48","first-page":"66","article-title":"Pose Estimation Algorithm and Verification Based On Binocular Stereo Vision for Unmanned Aerial Vehicle","volume":"5","author":"Zhang","year":"2014","journal-title":"J. Harbin Inst. Technol."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"707","DOI":"10.2514\/1.23410","article-title":"Real-Time Vision-Based Relative Aircraft Navigation","volume":"4","author":"Johnson","year":"2007","journal-title":"J. Aerosp. Comput. Inf. Commun."},{"key":"ref_50","doi-asserted-by":"crossref","unstructured":"De Wagter, C., Bijnens, B., and Mulder, J.A. (2007, January 20\u201323). Vision-Only Control of a Flapping MAV on Mars. Proceedings of the AIAA Guidance, Navigation and Control Conference and Exhibit (AIAA 2007-6853), Hilton Head, SC, USA.","DOI":"10.2514\/6.2007-6853"},{"key":"ref_51","first-page":"31","article-title":"Stereo vision and optical flow based obstacle avoidance algorithm for UAVs","volume":"24","author":"Zhu","year":"2017","journal-title":"Electron. Opt. Control"},{"key":"ref_52","unstructured":"Zhang, T., Yang, Z., Hu, G., Han, J., Zhang, X., and Shen, Y. (2017). UAV Obstacle Avoidance Method and System Based on Binocular Vision and Optical Flow Fusion. (CN106,681,353A), China Patent."},{"key":"ref_53","first-page":"30","article-title":"Research on the patent situation of the key technology of UAV system","volume":"3","author":"Li","year":"2017","journal-title":"Telecommun. Netw. Technol."},{"key":"ref_54","unstructured":"Xu, X., Wang, Z., Li, J., Yang, Z., Cai, K., Lu, M., Zhong, Z., and Liu, W. (2016). Orchard Plant Protection Drone Obstacle Avoidance Device and Method Based on Three-Level Obstacle Avoidance Mechanism. (CN201611251528.1), China Patent."},{"key":"ref_55","unstructured":"Giles, D.K., Billing, R., and Singh, W. (2015, January 13\u201315). Performance results, economic viability and outlook for remotely piloted aircraft for agricultural spraying. Proceedings of the International Advances in Pesticide Application, Barcelona, Spain. Record Number: 20163064113."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/3\/642\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T12:30:54Z","timestamp":1760185854000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/3\/642"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,2,3]]},"references-count":55,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2019,2]]}},"alternative-id":["s19030642"],"URL":"https:\/\/doi.org\/10.3390\/s19030642","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,2,3]]}}}