We developed a filling seal ring packing machine and carried out the conveying distance and container airtightness tests, and obtained the following results. As a result of testing whether the packaging paper is within 25mm of conveying distance and whether it is suitable for achieving the goal, the prototype with the target feeding distance of 23mm was shortened to 16.4mm for the right pavement line and 20.4mm for the left line, saving 80% compared to the existing one. As a result of the test of the automatic packaging machine for filling and sealing the air tightness of the container, it was confirmed that the air tightness was 100% maintained.

This study was conducted using mold heat. By developing the cleaning process technology, the production test was improved by twice, and the heat washing time reduction test and defect rate were also reduced. We designed an automatic production system for automatic heat torches and devised an automated continuous process system to improve the mold process. The production capacity test doubled the production rate of the product per 1 hour from the target of 500 to 1,040 per hour, and the heat cleaning time reduction test measured the time from the beginning of heat injection to the product sample during the production process and the end time, which shortened the development target of 5 seconds (sec) to 2.78 seconds (sec), and the defect rate was reduced to 4.25% as a result of the defect rate test. The system development of this project has doubled the production volume

The existing wire mesh clip forming process requires improvement as the production process is semi-automatic, which greatly threatens the safety of workers and exposes them to labor intensity and industrial accidents. In this research and development, we designed and developed an automated wire mesh automatic clip system by improving problems in the existing welded wire mesh production process. As a result, the production volume per hour was improved from 450 to 516, and the clip formation time was improved, shortening the production time to 42.5 seconds. Additionally, the defect rate was reduced from 7% to less than 3%.

This study improved the work efficiency by supplementing the shortcomings of the manual process by developing a double tube feeding device, and the following results were obtained by conducting the production capacity, production length, and defect rate tests. Developed a double tube production system to enable the simultaneous production of two tubes, increasing the production volume by about 1.5 times. The product length has been improved from semi-automatic to automated, and the production capacity has been improved from 16 to 25 pieces per hour (based on 15m). Developed a double-tube input straight line automatic adjustment feeder, which resulted in reducing the defect rate to less than 1%.

As a result of this study, the performance evaluation of the development of laminated paper automatic adhesive processing machine is considered and concluded as follows. The cardboard processing unit for automatic folding and gluing designed a feeder for supplying cardboard, and the prototype production was compared with the existing production and the developed product, and the production rate was improved from 31,100 to 46,500 pieces per day, and the production speed was increased from 68 to 98. The defect rate was solved by solving the folding problem by comparing the existing production and the developed product, and the standard of the defect rate of the product was based on the folding, and the X1-X4 average defect rate was confirmed to be 0,000607%.

By developing a high-quality plexiglass sign using LED, it is possible to respond to international competitiveness and effectively cope with market expansion measures. The degree of inhalation of the fine dust blown by the air nozzle was tested so that it was not blown into the air. As a result of this test, the acrylic absorption rate was 82%, an increase of 20% from 60% before improvement, and the working environment was improved. With the development of the dust extraction device for the acrylic processing machine in this study, the suction and removal of acrylic fragments or dust is smoothly performed, resulting in a cleaner, more hygienic and improved safety through the improvement of the working environment. As a result of comparing the amount of burr generated in the plexiglass material and comparing the degree of test performance for reaching 24,000 rpm, it reached 24,000rpm.

As the importance of the indoor environment increases. In response to that, performance test study was conducted for the development of high performance range hood. And the chamber casing mock-up was subjected to a performance test by applying a static pressure of 100[Pa] in accordance with KS C 9304: 2020, When the discharge port diameter was 100 mm, the standard flow rate() was 186.9 at 60.8W, the discharge port diameter was 125 mm, and the standard flow rate() at 52.0W was 184.6, which satisfies “B-type 160 to 200 (static pressure 100Pa)”. This is a result that meets the KS C 9304 : 2020.

The change in the performance of the range hood according to the pressure change was investigated through a comparative experiment, and the conclusion is as follows. KS C 9304: In 2020, static pressure was applied at 100 Pa according to the fan standard, and the test was conducted by varying the outlet diameter and power consumption. In the case of Motor power 55W, the air volume value was 184.6 when the outlet diameter was 125mm. As a result of the test, if the power consumption is 52.0W, the diameter of the outlet is 125mm, and the power consumption is 60.8W, and the diameter of the outlet is 100mm, it meets 160 or more and less than 200 (constant pressure 100Pa).

The following results were obtained by conducting a flow experiment. The experiment with air volume showed that the ducts with 3 shapes in the same cross-sectional area were large in the order of circular duct, square duct, and flexible duct. As a result of measuring the pressure value by duct shape to determine the cause of the difference between the flow rate and the air volume value by duct, the negative pressure was large in the order of circular duct, square duct, and flexible duct. in the countercurrent test, In the case of circular ducts, the deviation was high, In the case of Flexible ducts, the mild increase in the countercurrent is judged to be the difference in pressure and friction received by shape.

In this study, to improve the performance of kitchen range hoods, a comparative analysis of air volume and noise is conducted using three ducts by changing shapes. It was found that the difference in air volume was caused by the pressure difference received by each shape. The noise data can be found to be no more than 60dB overall, except for the second tier of A-type. The difference when connecting the circular, square, and flexible ducts was judged to be due to some laboratory noise, and it was found that there was no difference.

The existing production and manufacturing process was manually operated and the cleaning process was not constant due to poor environmental conditions for several hours, so the production efficiency was significantly lowered and manufacturing cost was increased. In this R&D, productivity improved by doubling the production of 300 units per hour to 700 units, and in this development, manufacturing costs were lowered through this process improvement project based on automotive shoba automation technology.

In this study, the following results were obtained by designing a high-efficiency hydrogel and colloid fusion applicator and checking production speed(hydrogel) and working setting time(coating time) by promoting the starting product. As a result of performing a product production test by manufacturing a starting product based on the process automation design, the production volume increased by about three times from 4m per minute to an average of 11m per minute. The working setting time(coating time) of the fusion applicator was shortened from the target of 10minutes to 1.69minutes, which had the effect of reducing the loss of work time.

In the event of an defective wire in the low-speed CAN communication of vehicle, the problem had to be solved by relying on fault codes or using expensive measuring equipment. An experiment was conducted to analyze waveforms of communication circuits with wire conditions such as normal, short circuits in the main body, and mutual short circuits. When the controller drives the CAN transceiver and transmits a message, the voltage and current waveforms were measured using an OEM oscilloscope to check for abnormalities in the circuit. As a result, it was confirmed that when a defective wire occurs in low-speed CAN communication, the CAN driver can switch to the fail-safe mode to exchange normal messages.

시감각기관을 통해 지각하는 1초 미만의 시간은 자극이 지속되었던 지속시간 이외의 요소인 비 시간적 특성에 의해 영향을 받는 것으로 알려져 있다. 그런데 거리 정보가 풍부하여 크기 항상성이 유지될 경우, 대상의 지속시간을 항상성 있게 지각한다는 연구들이 있다. 본 연구는 이전 연구들과는 달리 거리 정보를 제한한 실제 환경에서 크기 항상성과 시간 지각 항상성의 관계를 검증하였다. 이를 위해 참가자들의 양안 단서와 단안 단서를 제한하기 위한 장치를 고안하였다. 참가자들은 크기 항상성을 유지할 수 없었으며, 크기 착시가 발생하여 물리적 크기를 정확하게 지각할 수 없었다. 실험 1에서는 관찰 거리별 참조 자극과 시험 자극의 물리적 크기를 동일하게 제시하였다. 실험 결과 물리적 크기가 동일했음에도 불구하고 관찰 거리가 가까운 자극을 더 크게 지각하였으며, 자극이 더 오래 지속 되었다고 지각하였다. 실험 2에서는 관찰 거리별 참조 자극과 시험 자극의 망막상 크기를 동일하게 통제하였다. 관찰거리가 멀어질수록 자극의 물리적 크기는 커졌으나, 모든 자극의 지각된 크기가 동일하였다. 그 결과 모든 관찰 거리 에서 대상의 지속시간을 항상성 있게 지각하였다. 본 연구 결과는 거리 정보가 제한되었을 때에도, 시간 지각이 대상 의 지각된 크기에 영향을 받음을 보여준다. 또한 풍부한 거리 정보가 존재할 때, 관찰 거리가 달라지더라도 대상의 지속시간을 항상성있게 지각할 수 있음을 시사한다.

Recently, as interest in external environments such as fine dust has increased, the interior environment is also becoming important. The specifications for range hoods in the kitchen have been changed to improve ventilation of indoor air. Accordingly, the performance improvement through the structural design of the range hood was studied. Experiments were conducted on flow rates, pressure, temperature, and noise by A, B, and C-Type for performance analysis according to internal structure. For C-Type, the wind volume () was 223.69, 2nd stage 257.46, showing results of not less than 240 and not more than 280 within the ±1 m/s flow rate error range. Noise (dB) was an average value of 54.83 in the first stage and 60.65 in the second stage, showing results not more than 60 dB within the ±1 dB margin of error. This is the result of meeting KS C 9304:2020 Ventilation System Specification.

I propose an algorithm to detect defects in the production of wire mesh using computer image processing. The process is explained as follows, First reading consecutive frames coming through the camera, then the preprocessing process is performed. Second calculate the absolute difference between the two images to distinguish the moving wire mesh from the unnecessary background image. Third based on the past moving data of the welded wire mesh, predict and track future movement. As a result of observing the samples of some defective welded wire mesh products, it was confirmed that the horizontal line of the defective wire mesh had a higher height value of the tracked wire netting. Therefore it is possible to judge whether there is a defect or not at the same time without any additional process to judge. Finally, shear strength test were performed on the welds determined to be normal products by the algorithm proposed in this paper, so that I could verify the reliability and validity of the proposed algorithm.

In this paper, we break away from the method of removing and inspecting the GDI injector, measure the pressure change of the fuel rail pressure sensor when driving the GDI injector of a vehicle equipped with the GDI fuel system, and compare the results. analyzed.There was a pressure change in the fuel rail pressure sensor from the general drive GDI injector. There was no pressure change in the fuel rail pressure sensor when driving the GDI injector without injecting fuel. You can check the fuel injection status in the pressure change data of the fuel rail pressure sensor without removal the GDI injector.

The following results were obtained after developing and conducting tests on items set up for evaluation of the cotton machine system development by self-test and requesting an external authorized testing agency to conduct the test. In technology development, the re-materialization of cotton fragments reduced manufacturing costs by 40%, and the recovery rate was over 95% as a result of the cotton loss test for the development of cotton machine systems. The Feed Roller Speed Control performance test resulted in a revolution of 5 rev per minute.

In relation to the development of automatic discharging and grinding system producing eco-friendly composite fertilizer raw materials, the performance test was proceeded. and We had obtained the following results. 1. Of the evaluation items set as performance indicators for this technology development, the “grinding capacity” of the composite fertilizer roll mill is higher than the current market-sufficient performance (1500kg/hr) of 1800kg/hr.For “grind particle size”, results of less than 1.8 mm on average were obtained, which is smaller than market-sufficient performance (average less than 2 mm). 2. As a result of the evaluation of “1batch 400kg discharge time”, the results of less than 10min/1bach were obtained, which is shorter than the market satisfaction performance (15min/1bach).