• Journal of Practical Engineering Education
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• v.9 no.1
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• pp.15-21
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• 2017

In order to satisfy the graduation requirements, the graduation work should be presented as an engineering dissertation system of the produced work and an outline of the procedure made by the major unit in accordance with the graduation thesis submission rules, and suggests necessary matters for improvement. The design content relates to a small unmanned aerial vehicle configuration for detecting personnel or objects in a disaster area. It is equipped with an infrared sensor and a GPS in the drone, the drone is control by using Blutooth communications. The drones detect the target and use the GPS to determine the location. As a result of the experiment, it was possible to detect the structure object within the range of 3~4 m, confirm the transmission of the position value in real time, and increase the communication distance by using RF communication.

• Journal of the Institute of Convergence Signal Processing
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• v.22 no.1
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• pp.20-29
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• 2021

This study developed a smartwatch and a wind speed system in accordance with the necessity of a device that provides the information required in marine leisure. Based on a marine leisure smartwatch with a multi-sensor, a gyro box, and a wind speed system, external data such as GPS, motion, humidity, temperature, air pressure, and heart rate can be collected. In addition, the collected external environment data can be managed through an application on a smartphone, which is an Android-based mobile device. The developed smartwatch and wind speed system are expected to contribute to increasing accessibility and revitalization of the marine leisure industry. In addition, in terms of safety and education, the need for a device that provides marine information is large, so it is expected to increase the possibility of entering the high value-added market and improve the product localization rate.

• Smart Media Journal
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• v.1 no.4
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• pp.18-26
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• 2012

The increase of the number of smartphone applications has enforced the importance of new user interface emergence and has raised the interest of research in the convergence of multiple sensors. In this paper, we propose a method for the convergence of acceleration, magnetic and gyro sensors to recognize the gesture from motion of user smartphone. The proposed method first obtain the 3D orientation of smartphone and recognize the gesture of hand motion by using HMM(Hidden Markov Model). The proposed method for the representation for 3D orientation of smartphone in spherical coordinate was used for quantization of smartphone orientation to be more sensitive in rotation axis. The experimental result shows that the success rate of our method is 93%.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.4
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• pp.149-156
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• 2013

With a rapid growth of smartphone technologies, various applications are developed and diffused actively nowadays. Especially, interesting applications using camera module in a smartphone are developed continuously, mobile users are able to use various useful mobile services in humdrum life. In this paper, we design and implement measurement algorithms which precisely measure the object taken by the camera module in a smartphone. We use 3-axis gyro accelerometer sensor in a smartphone to get the distance, incline and rotation angle in a real time when we take a picture of shooting object and can obtain precise size of it in the picture image. The measurement algorithms proposed in this paper are analyzed and evaluated by a simulation study.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.233-235
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• 2017

Forklift tend to work in place rather than moving due to work environment conditions, so they express only the engine operation time without expressing the moving distance unlike a general car's instrument panel. Therefore, various consumables constituting the forklift have a replacement cycle according to the operation time of the engine. However, it is very difficult to judge the exact replacement cycle only by the engine operation time because the working environment differs for each forklift. In this paper, we propose a system that provides position information and moving distance information of forklift to driver using GPS and IMU sensor. By using this system, it is expected that the forklift status information, which is difficult to judge by the existing instrument panel, is provided as easier information, and economic benefits for forklift management and maintenance are expected.

• Smart Media Journal
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• v.2 no.1
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• pp.37-41
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• 2013

The Smart Use Interface Platform(SUIP) which is the next generation of smart phone's intelligent user interface platform researches, has a function of finding outer devices and has the dynamic loading function of the device driver. This paper introduce platform converter between smartphone and outer devices, named SUIP converter and it's applications, the SUIP converter can combines the smart phones which has Smart Use interface Platform and the Devices like sensor network devices which can be hardly connected to the smart phones.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.792-793
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• 2016

Recent studies on a fusion of health care system and the information and communication technology of wearable is being developed Anytime and anywhere without being constrained to measure the biological information of the user. However existing wearable monitors the measured biological information. If the user is hard to deal with for the event of dangerous situations. In this paper, it proposes a system that identifies the status of a user to correct the problem it utilizes sensors and algorithms to measure the biological information. This enables the user will be able to respond quickly to dangerous situations. In the event of a dangerous situation, such as falling or stumbling sends an emergency alert to a designated guardian.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.532-534
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• 2013

스마트폰 앱은 다양한 목적을 가지고 개발되어 사용자에게 지식의 정보 제공뿐만 아니라 생활의 유용한 정보도 함께 제공해주고 있다. 본 논문에서는 스마트 기기의 자이로스코프 센서(Gyroscope Sensor), 마이크(Mike), 알람(Alarm) 등을 활용하여 수면건강 관리 앱을 설계 및 구현하였다. 사용자의 수면 데이터를 수집하여, 추천 수면시간을 제공 받고, 수면장애 여부 등을 판단할 수 있을 것으로 예상된다.

• Journal of Biomedical Engineering Research
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• v.43 no.6
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• pp.399-408
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• 2022

Because arrhythmia occurs irregularly, it should be examined for at least 24 hours for accurate diagnosis. For this reason, this paper developed firmware software for arrhythmia detection and prevented consumption of temporal and human resources and enabled continuous management and early diagnosis. Prior to the experiment, the interval between the R peaks of the QRS Complex was calculated using the Pan-Tompkins algorithm. The developed firmware software designed and implemented an algorithm to detect arrhythmia such as tachycardia, bradycardia, ventricular tachycardia, persistent tachycardia, and non-persistent tachycardia, and a data transmission format to monitor the collected data based on BLE. As a result of the experiment, arrhythmia was found in real time according to the change in BPM as designed in this paper. And the data quality for BLE communication was verified by comparing the sensor's serial communication value with the Android application reception value. In the future, wearable devices for real-time arrhythmia detection will be lightweight and developed firmware software will be applied.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.281-284
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• 2022

코로나로 인해 대한민국의 모든 산업은 위축되었고, 모두가 힘든 시기를 보내고 있지만 그 중 캠핑산업은 예외이다. 코로나와 상관없이 야외에서 즐길 수 있는 캠핑장을 찾는 사람들은 꾸준히 늘어나고 있다. 이러한 캠핑에 있어서 가장 중요한 요소는 먹거리이다. 그 중 가장 대표적이고 잘 알려진 먹거리는 고기 요리이다. 본 논문은 캠핑족들의 편의를 제공해주기 위해 블루투스 통신을 통해 적정 고기 온도를 알려주는 서비스를 제공한다. 아두이노와 블루투스 서미스터 센서를 연결하여 안드로이드 스튜디오를 활용하여 애플리케이션을 개발하고, 블루투스로 통신을 통해 외부 장치 데이터 통신 구현을 통하여 실시간 온도 데이터를 확인할 수 있다. 또한 Firebase를 활용하여 레시피북을 제작해 접하지 못했던 육류 위주의 레시피를 제공하는 서비스도 제공한다.