• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.556-558
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• 2022

This paper proposes a CanSat system with a vehicle tracking function based on Jetson Nano, a high-performance small computer capable of operating artificial intelligence algorithms. The CanSat system consists of a CanSat and a ground station. The CanSat falls in the atmosphere and transmits the data obtained through the installed sensors to the ground station using wireless communication. The existing CanSat is limited to the mission of simply transmitting the collected information to the ground station, and there is a limit to efficiently performing the mission due to the limited fall time and bandwidth limitation of wireless communication. The Jetson Nano based CanSat proposed in this paper uses a pre-trained neural network model to detect the location of a vehicle in each image taken from the air in real time, and then uses a 2-axis motor to move the camera to track the vehicle.

• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.1-5
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• 2015

캔위성은 대기권 내에서 낙하하며 실제 위성을 모사하는 초소형위성으로 저렴한 비용과 용이한 접근성으로 인공위성 시스템 교육과 실험 등에 있어서 많은 주목을 받고 있다. 이러한 점을 착안하여 Argos는 촬영위성과 통신위성 2기로 구성된 캔위성 시스템을 개발하였다. Argos는 해당지역의 영상을 수집하고 위성 간 통신을 하는 것을 주 임무로 하였다. 또한 자세데이터, 위치데이터, 온도, 압력을 수집하고 지상국으로 전송 하는 것을 부 임무로 하였다. Argos는 실제 발사된 이후 제한적인 임무를 수행하였고, 위성간의 통신으로 임무데이터를 지상국으로 전송하였다. 본 논문에서는 광범위 데이터 수집의 역할을 하는 Argos의 개발과정과 운용결과를 소개하고자 한다.

• Proceedings of the KSME Conference
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• 2005.11a
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• pp.193.2-193.2
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• 2005

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.50 no.8
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• pp.573-581
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• 2022

This paper deals with the development of CanSat system, which ejects two maple seed-type autorotating science payloads and collects weather information. The CanSat consists of two autorotating science payloads and a container. The container is equipped with devices for launching science payloads and communication with the ground station, and launches science payloads one by one at different designated altitudes. The science payload consists of a space for loading and a large wing, and rotates to generate lift for slowing down the fall speed. Specifically, after being ejected, it descends at a speed of 20 m/s or less, measures the rotation rate, atmospheric pressure, and temperature, and transmits the measured value to the container at a rate of once per second. The communication system is a master-slave structure, and the science payload transmits all data to the master container, which aggregates both the received data and its own data, and transmits it to the ground station. All telemetry can be checked in real time using the ground station software developed in-house. A simulation was performed in the simulation environment, and the performance of the CanSat system that satisfies the mission requirements was confirmed.

• The Journal of the Korea institute of electronic communication sciences
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• v.18 no.6
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• pp.1239-1244
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• 2023

In this study, we developed an IoT-based management system to manage a can/PET crusher. Various sensors such as two load cells, DHT22 temperature and humidity sensor, and fine dust meter were interfaced with ESP32 to construct an IoT device, and a management server was built using Node-RED. The system monitors the weight of pressed cans and shredded PET bottles in real time and sends a text message to the manager when the weight exceeds the predetermined threshold for timely collection. The results of the operational test confirmed that the system provides accurate monitoring and efficient notification functions, and offers the possibility of solving environmental problems by improving the efficiency of waste management such as cans and PET bottles.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.276-279
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• 2021

캔 통신은 차량 내부의 전자장치 간 데이터 송수신 시에 사용되는 통신 방식이다. 차량 기술이 발전함에 따라 내부에 탑재되는 전자장치가 늘어나고 있고 이는 해킹의 위험성이 높아지고 있음을 의미한다. 이는 다가오는 4차 산업 혁명에서 자율주행 차량 기술의 치명적인 문제로 작용할 수 있다. 본 논문에서는 CAN Bus 통신에서의 위협 대응 방안과 안정성 향상에 대한 연구들의 동향을 살펴본다.

• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.32-34
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• 2015

캔위성은 대기권 내에서 낙하하며 실제 위성을 모사하는 초소형위성으로 저렴한 비용과 용이한 접근성으로 인공위성 시스템 교육과 실험 등에 있어서 많은 주목을 받고 있다. 이러한 점을 착안하여 Argos는 촬영위성과 통신위성 2기로 구성된 캔위성 시스템을 개발하였다. Argos는 해당지역의 영상을 수집하고 위성 간 통신을 하는 것을 주 임무로 하였다. 또한 자세데이터, 위치데이터, 온도, 압력을 수집하고 지상국으로 전송 하는 것을 부 임무로 하였다. Argos는 실제 발사된 이후 제한적인 임무를 수행하였고, 위성간의 통신으로 임무데이터를 지상국으로 전송하였다. 본 논문에서는 광범위 데이터 수집의 역할을 하는 Argos의 개발과정과 운용결과를 소개하고자 한다.

• Journal of Advanced Marine Engineering and Technology
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• v.35 no.1
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• pp.102-107
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• 2011

LED-based lighting motivated by significant energy savings provides an opportunistic development of widespread free-space optical communications. Their transceivers have a variety of competitive advantages over RF including high bandwidth density, reliability, lower energy consumption, and long lifetime. But, it is difficult for existing buildings and structures such as ships and vehicles to install the communication cable to the ceiling. In this paper, controller area network (CAN)-based LED lighting communication systems were proposed. Results indicate the viability of developing inexpensive CAN interface modules and transceivers might be embedded in lighting products to support the indoor wireless networking.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.11
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• pp.1713-1719
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• 2022

As the noise canceler with a small processing delay increases the sampling frequency, a better-quality output can be obtained. For a single buffer, processing delay occurs because it is impossible to write new data while the processor is processing the data. When synthesizing with anti-noise and output signal, this processing delay creates additional buffering overhead to match the phase. In this paper, we propose an accelerator structure that minimizes processing delay and increases processing speed by alternately performing read and write operations using the Symmetric Even-Odd-buffer. In addition, we compare the structural differences between the two methods of noise cancellation (Fast Fourier Transform noise cancellation and adaptive Least Mean Square algorithm). As a result, using an Symmetric Even-Odd-buffer the processing delay was reduced by 29.2% compared to a single buffer. The proposed Symmetric Even-Odd-buffer structure has the advantage that it can be applied to various canceling algorithms.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.2
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• pp.781-788
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• 2021

This paper is the study of a design to eliminate the communication error that occurs between the main controller and the servo controller of the K56 ammunition-carrying armored vehicle. The K56 assists in the operation of the K-55A1 self-propelled gun by automating the supply and loading of ammunition. The CAN communication board of the ammunition carrier is a key-function product mounted inside the main controller and installed for communication with the servo controller. It was confirmed that an undefined error would occur intermittently in the existing CAN communication board, interrupting the operation of the ammunition supply system during the loading process. In this paper, in order to solve the problem, the cause of the failure is identified through analysis and a functional test of the communication signal between the main controller and the servo controller. The error was resolved by redesigning and improving the Read/Write algorithm. Finally, the proposed cause analysis and design effectiveness were verified through the CAN communication board single item test and a system equipment application test. It is expected that this study will serve as a reference for improving defense capabilities through improving the reliability of CAN communication boards and by improving the reliability of the overall electronic equipment using DPRAM.