Design and Comparative Analysis of ECG Data Acquisition System using Low Power Microcontroller

보안공학연구지원센터(IJBSBT) 보안공학연구지원센터 2015 International Journal of Bio-Science and Bio-Techn Vol.7 No.5

Electrocardiogram (ECG) is the most commonly used bio-medical signal for diagnostic purpose. It can be used to diagnose heart disease, identify cardiac arrhythmias, and evaluate effect of drugs. Earlier the ECG systems were designed to be used in hospitals and clinics, but now there is an increased demand for the ECG machines that can be used as a lifestyle product for routine health monitoring. For example, we already have systems that are being used in homes for blood pressure and glucose level measurement. Therefore, user- friendly, affordable and portable ECG system that can be managed by the user is a great research area. The size, cost, performance, recording time & energy efficiency of medical equipment design has undergone a great transition along with a timeline. With the advancement in low power embedded hardware technology & Signal processing platforms, more efficient ECG system designs have started to emerge. This paper presents a review of the resent work on the design of portable & low power ECG systems. Further inspired by some of the related work [3-6], this paper also presents to design & development of a wearable & ultra-low power ECG data acquisition system using MSP430 microcontroller. The power consumption of the given design is then compared with other designs discussed in the literature review. The comparison shows that our design consumes the lowest power among these.

Design and Implementation Procedure of the AUTOSAR I/O Driver Cluster

Woong-Jae Won,Jangkyung Son,Gwangmin Park,Daehyun Kum,Seonghun Lee 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8

The basic software of the AUTOSAR platform is consisted of three layers, and it can be subdivided into types of cluster which are I/O, memory, communication, and system. Among those types of clusters, the I/O cluster provides standardized access to actuators, sensors, and ECU onboard peripherals through an I/O driver. Therefore, it is nature that the I/O driver depends on a microcontroller. Although the standard specification of the AUTOSAR platform describes requirements and some methodologies for implementing I/O driver, it is not only variables and obscures, but also taking long time to design and implement the I/O driver when it changes hardware. In order to solve those problems, we proposed design and implementation procedure for an internal structure of the I/O driver according to AUTOSAR requirements. And, we’l show the procedure and methodology of the design and implementation of a PWM driver in order to describe proposed procedure as an example.

장기간 소자 모니터링이 용이한 소형 무선랜 무선송신 계측장치 개발

박소정,박일후,문영선,이국진,김규태 한국반도체디스플레이기술학회 2018 반도체디스플레이기술학회지 Vol.17 No.1

Portable microcontroller based measurement unit is demonstrated using digital-to-analog convertor module, analog-to-digital convertor module and additional preamplifier circuit with low-budget but excellent performances. Using the designed measurement unit, the measurement of current below 1 nA with applying voltage up to 5 V is successfully carried out. With the WiFi module in microcontroller, measured data is transferred to the user's computer. To evaluate the performance of the measurement unit, the transfer curve of a commercial N-type field effect transistor was measured with the measurement unit and the results is well consistent with that measured using commercial characterization system.

8비트 마이크로컨트롤러 유닛 상에서 Rainbow 최적화 구현 및 분석

홍은기,조성민,김애영,서승현 한국정보보호학회 2019 정보보호학회논문지 Vol.29 No.4

In this paper, we propose and implement a method to optimize Rainbow for 8 bit MCU(Microcontroller Unit). Asquantum computers have been developed, the security of existing cryptography, especially the signature algorithms, has beenthreatened, so it is necessary to apply a signature scheme with a quantum-resistance to IoT devices. Currently, the proposedPQC(Post Quantum Cryptography) are lattice-based, hash-based, code-based, and MQ(Multivariate Quadratic)-basedcryptographic algorithms and signature schemes. In particular, MQ-based signature schemes are faster than conventionalsignature schemes and are suitable for IoT devices Do. However, it is difficult to apply 8-bit MCU, which has a large keylength and large number of computations, to the memory and performance of IoT devices. In this paper, we propose amethod of storing Rainbow, which is a MQ-based signing scheme, in 8-bit MCU by dividing the key and optimizing thecomputation method. By reducing the memory consumption and improving the algorithm speedily, Compare performance. 본 논문에 이차식 기반 서명인 Rainbow를 8비트 MCU(Microcontroller Unit)에 적용하기 위해 최적화 하는방안을 검토하고 구현한다. 양자 컴퓨터가 개발되면서 기존의 암호 알고리즘 특히, 서명 기법의 보안성을 위협함에 따라 IoT 기기에도 양자내성을 갖춘 서명 기법을 적용해야할 필요성이 있다. 현재 제안된 양자내성암호는 격자 기반,해쉬 기반, 코드 기반 그리고 다변수 이차식 기반 암호 알고리즘 및 서명 기법들이 있는데, 특히 다변수 이차식 서명기법은 기존의 서명 기법과 비교해 속도가 빨라 IoT 기기에 적합하다. 그러나 키의 길이가 크고 연산이 많아 IoT 기기 중 메모리와 성능에 큰 제약이 있는 8비트 MCU에는 기존의 구조 그대로 구현하기 어려워 이에 적합한 최적화가필요하다. 따라서 본 논문에서는 다변수 이차식 서명 기법인 Rainbow를 8비트 MCU에 키를 나누어 저장하는 방안과 연산방식을 최적화하여 메모리 소모가 적고 연산 속도가 빠르게 알고리즘을 개선하고, 구현해본 후 각 최적화 방식에 따른 성능을 비교한다.

양산 적용을 고려한 래피드 프로토타이핑 플랫폼 기반의 전자 스로틀 제어기 개발

박일수(Ilsu Park),박성민(Seongmin Park),김성근(Sungkun Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

A rapid prototyping is one of the most economical techniques which shorten the development cycle of the control system. It is easy to design and simulate the controller. But the automotive company must pay attention to production as well as design. Therefore, the automotive software developers need the platform which enables seamless development from concept to production level codes. This paper describes the platform which has the structure with hardware-specific layers and hardware-independent layers. The development of electronic throttle controller will be introduced as a practical application based on this platform.

모듈 형태의 마이크로프로세서 훈련용 키트 개발에 관한 연구

이상형(Sang-Hyoung Lee) 산업기술교육훈련학회 2020 산업기술연구논문지 (JITR) Vol.25 No.4

The purpose of this study is to realize a training device that allows learners to learn circuit design and firmware development skills in the field of electronics and automatic control. Currently, education and hands-on training are facilitated using devices produced by the relevant educational device manufacturers. However, devices developed to be integrated are not compatible with one another because different manufacturers quote different device specifications and provide different functions. Thus, consistent education and skill inculcation in the industrial field are difficult to achieve. In addition, achieving circuit design and firmware programming capabilities through integrated configuration and manual execution is not suitable in an environment limited in terms of hardware. To solve these problems, a modular microprocessor training device has been designed, manufactured, and utilized herein, allowing learners to practice efficiently via direct creation and connection of only the parts necessary for each training section, similar to the case of building blocks. This paper presents an effective direction in the field of educational training devices, whereby learners can receive effective education and learn good practices and applications.

TMS320F28377D 기반 아날로그-디지털 신호 처리 시스템

최준영,김형우,남기곤 대한임베디드공학회 2019 대한임베디드공학회논문지 Vol.14 No.1

We propose an embedded solution to design a high-speed and high-accuracy 16bit analog-digital signal processing interface for the control systems using various external analog signals. Choosing TMS320F28377D micro controller unit (MCU) featuring high-performance processing in the 32-bit floating point operation, low power consumption, and various I/O device supports, we design and build the proposed system that supports both 16-bit analog-digital converter (ADC) interface and high precision digital-analog converter (DAC) interface. The ADC receives voltage-level differential signals from fully differential amplifiers, and the DAC communicates with MCU through 50 MHz bandwidth high-fast serial peripheral interface (SPI). We port the boot loader and device drivers to the implemented board, and construct the firmware development environment for the application programming. The performance of the entire implemented system is demonstrated by analog-digital signal processing tests, and is verified by comparing the test results with those of existing similar systems.

융복합 무선통신을 이용한 키네틱 발광 오브젝트 제어 장치 및 방법에 관한 연구

강희라 한국디지털정책학회 2015 디지털융복합연구 Vol.13 No.6