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).
The development of this technology produced the design of welding mesh automation system and obtained the following results.
1. The performance criteria of this research and development were higher than this, resulting in more than 300 N/㎟ of disconnection and more than 250N/㎟ of double wire. Double wire also obtained values of as low as 521 N/㎟ and as high as 623 N/㎟
2. We compared the bending strength of the single mesh and the dual mesh by the bending test, and the result is 1692N of the average of single-mesh and 487N of double wire welded mesh.
3. As a result of the test, 64 minutes of abs of 5mm wire were 112 minutes of each. The welding speed was constant and stable.
기존 연구들은 도덕적 판단이 다양한 요인에 의해 영향받는다는 것을 보여주었다. 혐오감이 도덕적 엄격함을 유도하며, 도덕적 처벌에 대한 청중효과는 이를 보여주는 예들이다. 도덕적 판단이 유동적이라는 것은 강한 정서적, 인지적 효과를 가진 영상자극이 도덕적 판단에 어떤 영향을 미치는지에 대한 질문을 던지게 한다. 긍정영상이 도덕적 행동을 촉진한다는 것을 보여준 연구들은 일부 존재하지만(Schnall, Roper, & Fessler, 2010), 부정영상이 도덕적 판단에 미치는 영향을 확인한 연구는 존재하지 않는다. 본 연구는 인간의 선함과 악함을 보여주는 영상이 자신과 타인에 대한 도덕적 판단에 미치는 영향을 검증하였다. 이를 위해 참가자들에게 인간의 긍정 혹은 부정적인 면을 보여주는 영상을 시청하게 한 다음, 자신 혹은 타인의 도덕적 위반행위의 옳고 그름에 대해 판단하게 하였다. 그 결과 영상의 내용(긍정, 부정)과 행위주체(자신, 타인) 모두 도덕적 판단에 유의미한 영향을 미쳤으나, 두 요인간의 상호작용이 발견되었다. 특히 인간의 악함을 보여주는 영상을 시청한 경우 참가자들은 타인의 도덕적 위반행위를 더욱 가혹하게 판단하였다. 이 결과는 영상의 내용이 도덕적 판단에 영향을 미치며, 그 영향이 행위주체에 따라 달라진다는 것을 보여준다. 도덕적 혐오, 프레이밍 효과, 기본적 귀인오류에 근거하여 이 결과를 해석하였다.
In this technology development, we have developed an automation system after developing a material rotation mixing process so that the manual process of sound absorbing materials can be supplied in quantities. After setting up 5kgf supply of the fused acoustic material, the setting value of 5kg was automatically supplied to the molded frame to reach the quantification supply. In the process of producing noise goods between floors, the automatic compression system was developed, which was a manual operation of three persons, and the production of one person was allowed, and the production of 200 sound absorbers per day, It has improved to 450. Quantitative supply unit was developed to reach 50.7mm for target 50±3mm based on the sound absorption product thickness indication, reducing the defect rate to less.
This study was conducted to develop an efficient high performance range hood and exhaust system for quickly discharging flue gas, smoke, and odor generated when food is cooked in the kitchen, and the following results were obtained. Reverse current rate of 1.53 m/s of the range exhaust system was improved to achieve the inlet speed of 0.3 m/s or less. An efficient range system was constructed by improving the hood exhaust flow by 5.6 m/s at the existing 4.5 m/s.
인간이 외부 환경에 적절하게 대응하기 위해서는 정확한 시간 지각이 필요함에도 불구하고 다양한 비 시간적 (non-temporal) 특성들이 시간 지각에 영향을 주는 것으로 나타났다. 그동안 시간 지각에 영향을 주는 다양한 요인들이 검증되었지만 참가자와 자극 간의 거리가 시간 지각에 영향을 주는지 직접 검증한 연구는 없다. 본 연구는 자극의 망막상 크기, 물리적 크기, 지각된 크기를 고려하여 관찰 거리가 시간 지각에 미치는 영향을 검증하였다. 연구 결과, 자극의 물리적 크기 및 지각된 크기가 동일한 실험에서 관찰 거리의 효과가 나타나지 않았으며, 자극의 망막상 크기가 동일한 실험에서만 관찰 거리의 효과가 나타났다. 이는 자극의 망막상 크기가 동일한 경우, 관찰 거리가 증가할수록 자극의 물리적 크기 또한 커지기 때문에 자극의 크기가 시간 지각에 영향을 준 결과일 수 있다. 이러한 실험 결과는 정보가 제한되지 않는 경우에 관찰거리가 변화하더라도 대상의 지속시간이 항상성 있게 지각될 수 있음을 시사한다.