• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2008년도 학술대회 1부
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• pp.49-54
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• 2008

In order to do a maintenance task, a maintenance operator should learn the basic skills of the maintenance task such as assembly and disassembly (A/D). However, the key of the learning process is to learn the A/D task intuitively and naturally. Haptic guidance promises to give effectiveness and benefit qualitatively since a person can be trained to do the optimal task based on information that comes from an expert, database, or intelligent algorithms. By applying haptic guidance, a maintenance training process can be made more intuitive and natural in a virtual environment. This paper describes the development of a maintenance training system by using haptic guidance.

• 한국콘텐츠학회논문지
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• 제16권8호
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• pp.202-208
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• 2016

시각장애인의 활동범위가 늘어나면서 복잡하고 대형화된 건물들 속에서 목적지까지 안전하게 찾아가기란 쉽지 않다. 시각장애인을 위해 GPS 신호나 음성 알림 정보, 점자 유도 블록, 음향 신호기 등을 활용한 안내 시스템이 있지만 이는 대부분 실외 안내 시스템으로 실내에서는 적합하지 않다. 이에 본 논문에서는 보편화된 스마트 폰을 이용하여 시각장애인에게 해당 목적지에 대한 방향, 거리, 높이, 장애물 등의 목적지까지의 다양한 정보를 음성기술인 TTS(Text to Speech)와 촉각기술인 햅틱(Haptic) 그리고 블루투스 4.0기반의 근거리 무선통신 기술인 비콘을 이용하여 사용자에게 알려 줄 수 있는 실내 위치 추정 및 안내 시스템을 제안한다. 제한된 시스템의 실험 결과에서 사용자는 목적지까지의 최적 경로를 검색하여 TTS와 Haptic 기술을 이용해 안전하고 정확하게 안내받을 수 있었다.

• 제어로봇시스템학회논문지
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• 제20권9호
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• pp.971-976
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• 2014

Haptic device can be a useful rehabilitation tool in balance training. The proposed system is composed of a body-wear smartphone, Phantom Omni(R) device, and its control PC system. Ten young healthy subjects performed balance tasks with different postures during 30 seconds with their eyes closed. An Android program on the smartphone transferred mediolateral (ML) and anteroposterior (AP) tilt angles to the PC system, which can generate haptic command through haptic device. Statistical data analysis was performed using MATLAB(R). COP (Center of Pressure) related indexes were measured to see reduction in body sway. ANOVA showed that haptic device significantly reduced body sway. Intuitive balance guidance could be generated using an economical and small-sized commercial haptic device, making the system efficient.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권11호
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• pp.3064-3082
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• 2023

During the last decade, several Electronic Orientation Aids devices have been proposed to solve the autonomy problems of visually impaired people. When hearing is considered the primary sense for Visually Impaired people (VI) and it is generally loaded with the environment, the use of tactile sense can be considered a solution to transmit directional information. This paper presents a new wearable haptic system based on four motors implemented in shoes, while six directions can be played. This study aims to introduce an interface design and investigate an appropriate means of spatial information delivery through haptic sense. The first experiment of the proposed system was performed with 15 users in an indoor environment. The results showed that the users were able to recognize, with high accuracy, the directions displayed on their feet. The second experiment was conducted in an outdoor environment with five blindfolded users who were guided along 120 meters. The users, guided only by the haptic system, successfully reached their destinations. The potential of tactile-foot stimulation to help VI understand Electronic Orientation Aids (EOA) instructions was discussed, and future challenges were defined.

• 로봇학회논문지
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• 제8권3호
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• pp.217-227
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• 2013

We introduce a learning system for the sight reading of simple drum sequences. Sight reading is a cognitive-motor skill that requires reading of music symbols and actions of multiple limbs for playing the music. The system provides knowledge of results (KR) pertaining to the learner's performance by color-coding music symbols, and guides the learner by indicating the corresponding action for a given music symbol using additional auditory or vibrotactile cues. To evaluate the effects of KR and guidance cues, three learning methods were experimentally compared: KR only, KR with auditory cues, and KR with vibrotactile cues. The task was to play a random 16-note-long drum sequence displayed on a screen. Thirty university students learned the task using one of the learning methods in a between-subjects design. The experimental results did not show statistically significant differences between the methods in terms of task accuracy and completion time.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 추계학술대회 논문집
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• pp.135-138
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• 2005

Robotic devices have been widely used in many medical applications due to their accuracy and programming ability. One of the applications is a virtual reality medical simulator, which trains medical personnel in a computer generated environment. In this paper, we are going to present an application, an epidural anesthesia trainer. Because performing epidural injections is a delicate task, it demands a high level of skill and precision from the physician. This trainer uses a robotic device and computer controlled solenoid valve to recreate interaction forces between the needle and the various layers of tissues around the spinal cord. The robotic device is responsible for generation of interaction forces in real time and can be used to be haptic guidance that allows the user to follow a previous recorded expert procedure and feel the encountered forces.

• 제어로봇시스템학회논문지
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• 제22권11호
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• pp.877-882
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• 2016

Disaster robots have accepted tele-operation in order to share the intelligence of human operators and robot systems. Virtual wall is one of the tele-operation technology to support recognition of human operator. If the virtual wall can block the robot from dangers, the operator will feel comfortable and can concentrate on fundamental missions. In this paper, we proposes and compares three methods for virtual wall visualization in tele-operation using 3D reconstruction. First is a virtual wall visualized only with edges. A wall filled with transparent color is the second method. Finally, third method is a texture-mapped virtual wall. In the experiments, we discuss their merits and demerits in view of robot tele-operation.

• 한국산업정보학회논문지
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• 제25권3호
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• pp.31-38
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• 2020

본 논문에서는 시각장애인을 위한 이동보조시스템을 비교 분석하고, 6개의 장애물 감지 특징을 정리한다. 전통적으로, 시각장애인은 흰 지팡이를 사용하거나 안내견과 함께 보행한다. 최근 IoT 기술의 발달로 시각장애인의 보행을 보조하는 스마트 이동보조시스템이 개발되었다. 이러한 스마트 이동보조시스템은 장애물을 감지하고, 경로를 안내하는 역할을 수행해야 한다. 특히 스마트 이동보조 시스템은 장애물인지 판단하고, 햅틱 피드백을 통해 장애물 정보를 제공한다. 그리고 스마트 시스템은 서버를 구성하여 장애물의 정보를 저장하고, 다른 사용자에게 정보를 공유한다. 또한 저장된 장애물 정보를 통해 사용자 중심의 최적의 경로를 생성하여 시각장애인에게 장애물을 회피할 수 있는 경로를 안내한다. 스마트 이동보조시스템은 기계학습과 인공지능 기술을 적용함으로써 더욱 빠르게 발전할 것이다.