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홍형길(Hyunggil Hong),장선호(Sunho Jang),조용준(Yongjun Cho),윤해룡(Haeyong Yun),송재욱(Jae Wook Song) 한국기계가공학회 2023 한국기계가공학회지 Vol.22 No.7
A horticultural robotic system was designed to address the problems caused by the increased cost of agricultural materials, pesticide poisoning, and soil pollution due to the excessive use of pesticides. The system consists of a crop recognition module, remote control, sprayer system, and an integrated control module. First, the system communicates the speed and status of the platform to the integrated control module. Second, the crop recognition module transmits the crop recognition results to the spray system based on images acquired by the cameras on the left and right sides of the platform. Third, the system recognizes and sprays the pesticide onto the target crops according to the platform speed. Finally, seven factors (i.e., crop detection rate, gradient, straight forwardness, obstacle-overcoming step, road speed, spraying efficiency, and pesticide consumption) were evaluated to ensure that the correct pesticide spraying operation is performed while maintaining a stable position.
밭 노지 작업을 위한 모듈형 농업 로봇 플랫폼 개선에 관한 연구
김동우(Dongwoo Kim),홍형길(Hyunggil Hong),조용준(Yongjun Cho),윤해룡(Haeyong Yun),오장석(Jangseok Oh),강민수(Minsu Gang),박희창(Huichang Park),서갑호(Kabho Seo) 한국기계가공학회 2021 한국기계가공학회지 Vol.20 No.10
Our study introduces an improved modular agricultural platform to provide convenience to agricultural workers. We upgrade the platform design in three parts, namely, by adding a 458 pattern tire, electricity control, and four-wheel steering function, to improve the platform performance. Results showed that the upgrades enhanced the platform performance and reduced its overall weight as compared with the existing platform. To demonstrate the performance of our improved platform, we conducted five types of experiments with respect to the climbing angle, variable width, attitude control, speed, and obstacle passing.
A Study on Bird Deterrent System to Improve the Performance of Repelling Harmful Birds
Yongjun Cho(조용준),Haeyong Yun(윤해룡),Hyunggil Hong(홍형길),Jangseok Oh(오장석),Senongyong Woo(우성용),Suhwan Song(송수환),Dongwoo Kim(김동우),Minsu Gang(강민수),Kabho Seo(서갑호),Youngtae Lee(이영태),Jaedoo Jo(조재두) 한국기계가공학회 2020 한국기계가공학회지 Vol.19 No.8
We improved the sound pressure of the speaker and allowed the speaker to rotate 360 degrees to improve the effectiveness of the acoustic type bird repellent system. The prototype of the bird repellent system was developed by evaluating sound pressure characteristics by distance and direction and installing orchards. As a result of the evaluation, the extermination sound pressure increased from a distance of about 30 m to a maximum of 60 m, and through the rotary speaker, the extermination distance could be widened in all directions without specific direction.
박관형(Kwanhyung Park),조용준(Yongjun Cho),홍형길(Hyunggil Hong),장선호(Sunho Jang),강민수(Minsu Kang),김재효(Jaehyo Kim),박희창(HuiChang Park),윤해룡(Haeyong Yun) 한국기계가공학회 2022 한국기계가공학회지 Vol.21 No.12
With the decrease in the number of workers in the domestic agricultural population and the rapid aging of the population, the need for technology that minimizes the risk of disease and enables efficient work is emerging in agricultural sites. Robot technologies and devices for preventing and treating diseases of workers or patients are being developed in industrial and medical fields, but there is a limit to their application to agricultural work in which atypical work is mixed. In addition, considering that most of the agricultural population is elderly and female, it is essential to develop wearable suits that can experience muscle assistance effects with comfortable fit in various movements. In this paper, we developed a wearable suit system that considers wearability and weight as a muscle strength aid. And in order to evaluate the characteristics of the developed product, the performance is verified by measuring the degree of muscle fatigue through EMG tests.
조용준(Yongjun Cho),윤해룡(Haeyong Yun),홍형길(Hyunggil Hong),오장석(Jangseok Oh),박희창(Hui Chang Park),강민수(Minsu Kang),박관형(Kwanhyung Park),서갑호(Kabho Seo),김순덕(Sunduck Kim),이영태(Youngtae Lee) 한국기계가공학회 2021 한국기계가공학회지 Vol.20 No.9
We developed a platform that was capable of autonomous steering in a furrow environment. It was developed to autonomously control steering by recognizing the furrow using a laser distance, three-axis tilt, and temperature sensor. The performance evaluation indicated that the autonomous steering success rate was 99.17%, and it was possible to climb up to 5° on the slope. The usage time was approximately 40 h, and the maximum speed was 6.7 ㎞/h.
권준혁(Junhyuk Kwon),이명호(Myungho Lee),조형호(Hyungho Cho),홍형길(Hyunggil Hong),조용준(Yongjun Cho),윤해룡(Haeyong Yun),오장석(Jangseok Oh),박희창(Huichang Park),강민수(Minsu Gang) 한국기계가공학회 2021 한국기계가공학회지 Vol.20 No.12
In this study, we developed an automatic module changer for agricultural implements for using in unmanned agricultural robots. An automatic module changer is attached by lowering from the top to bottom of the implements and fixing the four fastener bars attached to the implements in combination. The lift function was implemented using seesaw-type structures to keep the engagement point constant when the automatic module changer climbs and descends, and the switching function of the automatic module changer was implemented using the link device in the cam structure. We developed an algorithm to check the presence of attachment and opening/closing of the workpiece using limit switches and verified the performance through combination assessment and weight lift test to assess whether the combination was within the error range.
적층제조를 고려한 농업용 근력 보조 외골격 슈트의 설계
박관형(Kwanhyung Park),윤해룡(Haeyong Yun),조용준(Yongjun Cho),홍형길(Hyunggil Hong),장선호(Sunho Jang),강민수(Minsu Kang),김재효(Jaehyo Kim),김호찬(Hochan Kim) 한국기계가공학회 2022 한국기계가공학회지 Vol.21 No.12
Because there are few constraints on the structure design of a product in manufacturing, additive manufacturing technology aids to the simplification of many manufacturing processes in numerous industries. In instance, as compared to traditional cutting, casting, and clay modeling, it is able to produce prototype models relatively rapidly and simply. This is especially useful when employing additive manufacturing technologies to create robots or wearable platforms with complex shapes and many considerations. This article presents an application case for a wired power transmission type wearable suit system for a single actuator, with the assumption that it will be created using additive manufacturing technology to address issues with existing agricultural wearable robots.