• 대한전기학회:학술대회논문집
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• 대한전기학회 2015년도 제46회 하계학술대회
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• pp.864-865
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• 2015

차량 운전 시 주변에 경고를 하는 수단인 Vehicle Horn은 경험에 의존하는 방식으로 설계되고 있다. 그러나 Vehicle horn의 성능 및 제작비용을 고려한 최적설계를 위해서는 정형화된 설계 process가 필요하다. 이러한 필요를 충족시키고자 본 논문에서는 Vehicle Horn의 초기 설계 process를 제안한다. 자기등가회로를 이용해 특성을 예측하여 Vehicle horn의 초기 형상을 결정한다. 그리고 초기 형상에 대한 FEA를 수행하여 자기등가회로를 검증하고 전자기 파라미터를 산정한다. 마지막으로 전자기 파라미터를 Vehicle horn의 전기-기계 시스템을 구현한 Dynamic Simulator에 적용하여 Vehicle horn의 거동을 예측한다.

• 한국도로학회논문집
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• 제17권2호
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• pp.135-141
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• 2015

PURPOSES : While driving, drivers are usually limited in communicating with others except for using the horn. Excessive use of the horn may cause noise pollution, quarrels between drivers and pedestrians, damage, etc. This study developed a methodology for environmental adaptation and improvements of vehicle horns. METHODS: In this study, we performed a literature review of previous studies and related technologies regarding the overuse and damage of the horn. The proposed methodology employed the paired comparison method, as well as the semantic differential method. These methods can consider various vehicle horns, such as the Sport Utility Vehicle(SUV) Horn, Van Horn, and Buzzer. In addition, we conducted a factor analysis in order to provide a direction for improvement of future horns. This research provides a means of complimenting existing intellectual property related to vehicle horns. RESULTS: As a result, the most preferred of the selected horns were the Buzzer at 86.7%. In addition, based on the factor analysis, the horns could be classified into pleasantness and comfort factors. The results indicate a positive reaction for various vehicle horns. The horn type and size of the process control have been properly developed considering the position of the vehicle and the surrounding noise measurements. CONCLUSIONS : Based on the proposed methodology, public and private sectors can use fundamental data for reasonable traffic-noise control policies.

• 동력기계공학회지
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• 제17권3호
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• pp.111-122
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• 2013

After the port opening in 1876, the western people made joseon image as the land of morning calm. there was a conception that joseon was a uncultivated country in the meaning of the land of morning calm. famous modernists such as gil-jun yu, kwang-su lee also had same conception. but such conception began to change in 1930's. the number of motor vehicle began to increase rapidly in 1930's. and also many of motor vehicle were equipped with air horn or electronic horn instead of bulb horn. bulb horn made thick and low rubber sound. but air horn or electronic horn made sharp and high metallic sound. city people of colonial joseon began to recognize air horn or electronic horn as city noise. so they tried to control the use of air horn or electronic horn. finally, in late 1930's, the use of air horn and electronic horn were prohibited.

• 자동차안전학회지
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• 제12권4호
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• pp.70-77
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• 2020

In this study, we estimate the vehicle speed by analyzing the acoustic data recorded in a single microphone of a surveillance camera. The frequency analysis of the acoustic data corrects the Doppler effect, which is a characteristic of the moving sound source, and reflects the geometric relationship according to the location of the sound source and the microphone on the two-dimensional plane. The acoustic data is selected from the horn sound that is mainly observed in an urgent situation among various sound sources that may occur in a traffic accident, and the characteristics of the monotone source are considered. We verified the reliability of the proposed method by time domain acoustic analysis and actual vehicle evaluation. This method is effective and can be used for traffic accident analysis in the blind spot of the camera using a single microphone built into the existing surveillance camera.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2013년도 추계학술대회 논문집
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• pp.513-518
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• 2013

The purpose of vehicle horn sound is for warning to pedestrians. In the past, the main development factor is to match the regulation level. But nowadays perceived quality is more important than level itself. In this study, we measure variety horn sound and evaluate its signals through the jury evaluation aimed at making horn sound quality index. Each contribution of the noise path for sound quality is identified and the target values and methods for implementing the luxurious horn sound are suggested. Finally, we developed, horn component and improve horn mounting condition for luxurious horn sound.

• 한국항행학회논문지
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• 제27권6호
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• pp.828-834
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• 2023

본 논문에서는 패치배열안테나에 혼 형상의 반사기를 적용하여 넓은 빔 폭을 형성하는 안테나를 연구하였다. 넓은 빔 폭을 구현하기 위해 정사각형 마이크로스트립 기판 상의 4개 방면에 3개의 패치들을 각각 배열하였고, 배열안테나 후방에 혼(Horn) 형상의 반사기를 각각 적용하였다. 이 구조를 통해 패치로부터 형성 된 수직 빔 패턴이 사선 방향으로 변환되었고 결과적으로 네개의 섹터에서 형성된 각각의 빔 폭이 더해져서 반구형에 가까운 넓은 빔 폭을 만들 수 있었다. 제안된 안테나는 UAV(unmanned aerial vehicle)에 적용하기 위해 연구되었고 모의시험결과, 4.5 dBi 빔 폭이 146.8°임을 확인하였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2013년도 춘계학술대회 논문집
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• pp.114-115
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• 2013

• Design & Manufacturing
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• 제12권3호
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• pp.25-30
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• 2018

Recently The automotive industry is trying to increase the energy efficiency by reducing the weight of the car body and engine components as a way to achieve high energy efficiency. In particular, the reduction of the weight of the vehicle through the weight reduction of the vehicle body has the advantage that the fuel consumption and the output can be improved. But at the same time, there is the disadvantage that the strength becomes weak due to the reduction of the material thickness. Therefore, in order to overcome these disadvantages, materials with high strength according to the unit thickness have been actively developed, and researches for applying them have also been increasing. In this study, we will investigate the application of cold rolled steel sheet, which is a lightweight material, to a horn bracket that secures a installed in an automobile engine room. The horn bracket secures the horn on the car engine and is bolted to the outer wall of the engine. The momentum is acted on the bracket due to the distance between the bolt fastening part and the car horn installed on the bracket end side. Therefore, the body part of the bracket is more likely to be destroyed by the influence of the continuous stress. In this paper, design optimization for weight reduction and strength enhancement was performed to solve this problem, and possibility of applying the rolled steel sheet material as lightweight material by tensile test and fabrication was confirmed.

• 한국임상수의학회지
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• 제41권2호
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• pp.112-116
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• 2024

Uterine rupture is uncommon in small animals and can be caused by trauma, infection, dead fetus, or inappropriate obstetric techniques. A 4-year-old, intact female mixed-breed dog weighing 3 kg presented for elective ovariohysterectomy with a history of a motor vehicle accident two months previously. The patient showed no clinical signs of uterine abnormalities or evidence of pregnancy during physical examination. Clinical examinations, radiography, and ultrasonography revealed no significant findings. During ovariohysterectomy, a completely transected left uterine horn and dome-shaped ends were identified. The uterine layers were everted such that the endometrium could be seen outside the uterine horn. The dog recovered without post-operative complications and was discharged the following day. This report describes a rare case of an asymptomatic uterine rupture caused by trauma in a non-gravid dog.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 1994년도 춘계학술대회논문집; 영남대학교, 20 May 1994
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• pp.172-178
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• 1994

본 연구에서는 경음기 본래의 사용 목적인 안전운행을 저해하지 않으면서 사용할 수 잇는 보다 혐오감이 덜한 음질의 경적음을 도출하고자 국내에서 생산, 유통되고 있는 경음기의 현황 파악 및 종류별 경적음의 특성을 분석하고, 이들의 단음과 복합음을 녹음.재생하면서 상호간에 대한 주관적 반응을 설문 조사하여 경음기 1개 장착시 단음 피크치의 음역별 음질과 2개 장착시의 복합음 음질개선을 위한 적정 주파수범위를 도출하고자 하였다. 그리고 자동차 생산공장에 출장하여 차량에 장착된 경음기의 경적음 특성을 분석하여, 그 음량의 크기와 dB(A) 및 dB(C)의 차이와 국내.외 자동차의 경적음에 대한 관리 및 규제 기준을 수집, 분석하여, 소음진동규제법과 한국공업규격에 서로 다르게 규정하고 있는 평가단위를 통일하고자 하였다.