• 한국기계가공학회지
• /
• 제20권12호
• /
• pp.30-35
• /
• 2021

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.

• 한국기계가공학회지
• /
• 제11권6호
• /
• pp.158-163
• /
• 2012

This study investigates numerical analysis for robot welder fume flow and gantry structure. The solvers are STAR-CCM+ and ANSYS workbench used on flow and structural analysis. The results show that fume is diffused in factory when the welding fume is remove at dust collector. But dust collector intercepts the fume diffusion into workroom by removing most of welding fume. Structure analysis result shows that the reinforcement rod is evaluated to main the safety by supporting sufficient structure.

• 한국기계가공학회지
• /
• 제21권6호
• /
• pp.22-29
• /
• 2022

In this study, an automatic marking system for fabric inspection machines was developed. The main objectives of the study were to promote intelligence and automation for the inspection process, as well as to increase textile industrial productivity. Generally, when a worker manually inspects and marks a fabric, human error and reduced efficiency are unavoidable. To overcome these problems, we developed an automatic marking system that uses robots. This system incorporates a vision camera to automatically recognize defects, and an optical fiber sensor to detect the side of the fabric. To verify the performance, the control system sends a command directly to the robot to mark the fabric. Finally, the actual production confirmed that the proposed system could perform the desired motion.

• 한국산업융합학회 논문집
• /
• 제27권1호
• /
• pp.71-76
• /
• 2024

Automatic production systems are constantly advancing technologies to improve productivity and safety. Specifically, liquid filling machines are primarily utilized to package products into drums after manufacturing process in the hazardous chemical industry. Most existing filling machines allow the operator to open the drum cap and inject the product directly or semi-automation. In this study, we have developed a cap opening and closing mechanism onto the existing drum filling machine, enabling automatic and safe cap manipulation while filling the product in the IBC tank. By applying the appropriate torque value through numerical analysis, we confirmed that the system worked without any problems during the process of opening and closing the cap. Therefore, it is expected that the developed machine will give more production and reduce human efforts without risk in the chemical packaging industry.

• 한국융합학회논문지
• /
• 제12권5호
• /
• pp.31-38
• /
• 2021

최근 일반인의 배뇨활동에 도움을 주는 장치가 개발되고 있으나, 사용자의 배뇨 습관과 기능, 사용자의 접근성 등을 고려한 제품은 부족하다. 본 연구에서는 배뇨활동에 도움을 주는 장치 중 자동 석션 기능 등 융, 복합 기능을 지니고 있는 스마트 자동 소변처리기를 기준으로 사용자의 만족도와 제품의 개선점을 찾고자 사용성평가를 실시하였다. 개발된 사용성평가 지표는 모두 21개이며, 안전성과 조작성, 만족도를 기준으로 개발하였다. 그 결과 기능적인 만족도는 높았으나, 디자인 측면에서는 손잡이 등의 개선해야 할 문제점이 제시되었다. 따라서 본 연구를 통해 자동 소변처리기의 성능측면의 만족도가 제품을 대표할 수 없으며, 제품의 문제점을 찾기 위한 사용성평가 지표 개발의 중요성을 알게 되었다.

• Journal of applied mathematics & informatics
• /
• 제20권1_2호
• /
• pp.595-602
• /
• 2006

Determinations of conformal map from the unit disk onto a Jordan region are reduced to solve the Theodorsen equation which is an integral equation for the boundary correspondence function. Among numerical conformal maps the Wegmann's method is well known as a Newton efficient one for solving Theodorsen equation. However this method has not so wide class of convergence. We proposed as an improved method for convergence by applying a low frequency filter to the Wegmann's method. In this paper, we investigate error analysis and propose an automatic algorithm based on this analysis.

• 식품보건융합연구
• /
• 제7권6호
• /
• pp.17-24
• /
• 2021

This study investigates the exercise-physiological changes in stages through the movement of the automatic stepper and to analyze the usefulness of the automatic stepper. For 18 male university students, out of 10 levels, 5 level and 10 level of automatic stepper exercise were performed. At each 10, 20, 30 minutes during exercise, 5 and 10 minutes after exercise stop the subjects were examined to analyze the changes in energy consumption after minutes, respiratory exchange rate, heart rate, oxygen consumption per body weight, METs, cumulative energy consumption, and lactic acid to verify the usefulness of the automatic stepper. The mean and standard deviation were calculated using the SPSS, and one-way ANOVA with repeated measure was performed to verify the difference in the mean between time periods. The LSD method was used for the post-hoc test, and the significance level was set to α = .05. There were no significant changes in both 5 and 10 level, but the cumulative energy consumption over time increased significantly. In addition, as a low-intensity exercise intensity is shown, a low increase in lactic acid indicated a safe exercise level. In future studies, in-depth studies of various variables through regular exercise programs are needed for those who need safe exercise.

• 한국융합학회논문지
• /
• 제9권5호
• /
• pp.145-150
• /
• 2018

공작기계의 주축은 황삭 가공에서 부터 정삭가공에 이르는 다양한 작업들이 가능해야 하고, 정속운동 또는 회전 위치결정의 기능을 수행해야 되므로 주축설계에 고려해야 할 변수들이 많다. 주축이동식자동선반은 고정식자동선반에 비해 샤프트가 가늘고 긴 핀 들을 작업할 때 좋은 선반이다. 고정식 자동선반에 비해 외경가공의 밀도가 매우 높다. 주축 이송형 선반은 주로 소형 제품을 정밀가공 할 경우에 사용되므로 가공 정밀도가 높아야 한다. 최대 외경 가공 한계 치수는 Ø32, 내경가공 한계 치수는 Ø6까지 가공이 가능하게 제작되어야 한다. 본 연구에서는 주축이동식 자동선반에 사용되는 SCM440 소재의 정 동적특성을 이동식 선반에 적용하여 분석하였다. 주축의 정,동적 특성에 영향을 미치는 인자들을 고려하여 고속화 및 고정밀도를 갖는 최적설계기술이 확보하기 위하여 수치해석을 이용하여 분석하였다.

• 한국산업융합학회 논문집
• /
• 제26권4_2호
• /
• pp.577-584
• /
• 2023

In this study, among the parts of oil vapor collectors that are already being produced, weaving wire brush automatic transplanters for oil vapor collectors for machine tools of the weaving fixing method, which are not automated due to the specificity of the process and are being produced manually, are developed and reliability is secured through performance evaluation. did Oil vapor collectors play an important role in removing air pollutants and improving air quality, and the coagulation effect of the collection technology is mostly due to brushes. In the experiment, an automatic transplanter was developed to automatically manufacture and produce the wire brush of the oil vapor collector, which is manufactured and used manually. For the experiment of the developed wire brush, an experimental chamber was built, and performance and durability were evaluated through the dust collection efficiency evaluation using the electrostatic precipitator method of contaminants (oil mist). Through this study, we intend to reduce the production time and unit cost of collectors and improve the environment at industrial sites.

• 한국산업융합학회 논문집
• /
• 제14권4호
• /
• pp.143-149
• /
• 2011

The experiment has been investigated the room temperature change under adjusting 4-way valve which was installed for cooling and heating switch. Beside, the temperature of heat pump was controlled automatically for autonomously adjusting temperature and maintaining a constant room temperature. As results, Inlet & outlet temperature differences of compressor are $95^{\circ}C$ in cooling condition and $57^{\circ}C$ in heating condition. Therefore, Compression efficiency of cooling effect is higher than heating effect. In addition, Heat exchange effect of Cooling system condition is higher than heating system. This results can be used for studying about automatic temperature control of cooling and heating system with heat pump and 4way valve.