• 한국안전학회지
• /
• 제34권2호
• /
• pp.22-27
• /
• 2019

Bikers can be subjected to accidents during their bicycling. Helmets are only good, if any, for their head protection. A wearable airbag can protect the human neck area if it is properly designed. This airbag system is composed of an inflater and an airbag. The inflater contains a pressurized gas cylinder and a piercing device. The airbag is an inflatable fabric surrounding the human neck. When a bicycle accident happens, a sensor captures the motion of the biker and a microcomputer sends a signal to open a valve in the inflator to supply the pressurized gas to the airbag. An important issue of this system is that the airbag should be quickly inflated to protect the human neck. This paper deals with the airbag inflation time simulation and some issues to design a wearable airbag system. Also, a prototype was tested to show its feasibility using a human dummy mounted on a running cart.

• 한국안전학회지
• /
• 제35권2호
• /
• pp.94-99
• /
• 2020

Bikers can be subjected to injuries from unexpected accidents even if they wear basic helmets. A properly designed airbag can efficiently protect the critical areas of the human body. This study introduces a wearable smart airbag system using machine learning techniques to protect human neck and shoulders. When a bicycle accident happens, a microprocessor analyzes the biker's motion data to recognize if it is a critical accident by comparing with accident classification models. These models are trained by a variety of possible accidents through machine learning techniques, like k-means and SVM methods. When the microprocessor decides it is a critical accident, it issues an actuation signal for the gas inflater to inflate the airbag. A protype of the wearable smart airbag with the machine learning techniques is developed and its performance is tested using a human dummy mounted on a moving cart.

• 한국기계가공학회지
• /
• 제20권1호
• /
• pp.25-33
• /
• 2021

This paper presents the development process for airbag safety devices fitted in motorcyclists' garments. Motorcycle riders often sustain multiple injuries in crashes since rider post-impact kinematics depend on several variables. This study proposes a newly inflatable safety system connected to the motorcycle by a cable. An airbag device with a mechanical triggering system is deployed when the cable detaches from its mounting clip. Airbag filling tests are performed to determine the mixing ratio of compressed gases with the severance of temperature. To estimate the airbag effectiveness to reduce riders' injuries, numerical analysis is performed using the finite element method. A comparative analysis (i.e., with and without the chosen device) was conducted to evaluate its protective efficacy. Prototype garments based on the proposed design have been created and have undergone sled tests. The proposed safety device could also be beneficial in accidents during other sports activities.

• 한국산학기술학회논문지
• /
• 제22권3호
• /
• pp.597-602
• /
• 2021

4차 산업혁명의 시대에서도 여전히 산업 재해 예방은 산업 현장에서 중요한 문제이다. 그런데, 산업 안전의 문제를 해결하는 과정에서 개발된 제품이 신뢰성 있는 성능평가에 대한 기준이나 방법의 부재로 시장 출시에 대한 어려움이 큰 상황이다. 본 연구의 목적은 산업 현장에서 추락 사고에 대응하기 위해 새롭게 개발된 추락 인체 보호용 착용형 에어백 제품에 대한 시험 방법개발 및 평가이다. 연구 방법으로는 기존에 없는 융합 신제품 평가개발 process 4단계(1단계: 제품검토, 2단계: 자료조사, 3단계: 전문가 회의, 4단계: 평가기준도출)를 통해 신뢰성 있는 평가 기준을 개발하고 적용하였다. 또한 개발된 평가 기준에 따라 추락 인체 보호용 착용형 에어백 소재에 대한 충격력을 평가하였다. 평가로 얻어진 추락 충격력은 기존 충격력 대비 96% 정도의 감소 효과를 나타내어 에어백 적용 시 추락 충격력이 현저히 줄어듦을 확인할 수 있었다. 이를 통해 융합 신제품이 시장 출시를 할 수 있도록 하였으며, 산업 현장 근로자가 안전하게 작업할 수 있는 환경을 조성하게 될 것으로 보인다.