Design and Implementation of NMEA Converter to Transform Gyro Direction Signal in a Vessel

Recently, communication equipment (satellite communication appliance, digital communication appliance) and Navigation equipment are high value-added industries which need advanced satellite and digital technologies in maritime industries. According to a vessel conveniences regulation, Gyro-Compass installed in 500T over ship, it is a presentation that standard by International convention for the Safety of Life at Sea and IMO resolution A.422(&#8570) of International Maritime Organization. The NMEA(National Marine Electronics Association) converter interface between Gyro-Compass Output Signal and the others marine equipment, it is play to the NMEA data format change. NMEA is dedicated to the education and advancement of the marine electronics industry and the mark which it serves. It is non-profit association composed of manufacturers, distributors, dealers, education institutions, and others interested in peripheral marine electronics occupation. The NMEA standard defines an electrical interface and data protocol for communication between marine instrumentations. NMEA converter system is a designed of set up three-type format input signal, if a input to signal, possibility interface between Gyro and other marine equipment, NMEA-0183 standard output to interface other marine equipment. In this study, I produced the NMEA converter system using AT89C52 microcontroller in ATMEL Inc. and expected Gyro-Compass direction sensor, monitoring Synchro input signal through NMEA converter system, it make confirmed interface between Gyro Compass and other marine equipment AIS. at the time, using RS-422 serial communication of ICE61162-1, 61162-2 digital interface. Today, NMEA converter system used import the most companies of Germany, Russia and other country, it is not korea. in this thesis, suggest the design and implement of NMEA converter system. Thus it will be good for basic research data to produce NMEA converter system ourselves.제 1 장 서 론 1 제 2 장 자이로콤파스의 이론적 배경 4 2.1 자이로콤파스의 원리 4 2.2 지북원리 7 2.3 동적방식 12 2.4 각도검출 센서 14 2.5 해상전자장비 접속규격 19 제 3 장 NMEA 변환기 시스템의 설계 및 구현 30 3.1 시스템의 분석 및 회로의 구성 30 3.2 신호처리 알고리즘 38 제 4 장 시스템의 평가 및 고찰 43 4.1 시험 환경 43 4.2 시스템의 성능평가 44 제 5 장 결 론 50 참 고 문 헌 5

Electrocardiogram (ECG/EKG) using FPGA

FPGAs (Field Programmable Gate Arrays) are finding wide acceptance in medical systems for their ability for rapid prototyping of a concept that requires hardware/software co-design, for performing custom processing in parallel at high data rates and be programmed in the field after manufacturing. Based on the market demand, the FPGA design can be changed and no new hardware needs to be purchased as was the case with ASICs (Application Specific Integrated Circuit) and CPLDs (Complex Programmable Logic Device). Medical companies can now move over to FPGAs saving cost and delivering highly-efficient upgradable systems. ECG (Electrocardiogram) is considered to be a must have feature for a medical diagnostic imaging system. This project attempts at implementing ECG heart-rate computation in an FPGA. This project gave me exposure to hardware engineering, learning about the low level chips like Atmel UC3A3256 micro-controller on an Atmel EVK1105 board which is used as a simulator for generating the ECG signal, the operational amplifiers for amplifying and level-shifting the ECG signal, the A/D converter chip for analog to digital conversion of the ECG signal, the internal workings of FPGA, how different hardware components communicate with each other on the system and finally some signal processing to calculate the heart rate value from the ECG signal

Design of AC Charging Interface and Status Acquisition Circuit for Electric Vehicles

To address the unreliable charging of new charging interfaces caused by comprehending deviation on China’s alternating current (AC) charging interface standard for electric vehicles, implementation methods of AC charging interface circuit, control pilot (CP) circuit, and status acquisition circuit for electric vehicles were proposed in this study. Basic principle and functions of the CP circuit were discussed, and influences of resistance parameters on voltage state at test point were analyzed. Freescale MC9S12XEQ512 was used as the main controller, and its integrated pulse-width modulation module and analog-to-digital converter module were used to simplify circuit designs. An experimental test on charging interface connection confirmation, CP, output power parameter passing, and real-time charging connection status acquisition was conducted on real vehicles. Results demonstrated that the designed circuits exhibit high security and meet the basic requirements of GB/T20234-2 with regard to AC charging interface characteristics. All test data are within the allowed error range. Furthermore, real-time monitoring of the charging process and security isolation design of signals can effectively improve the system stability. Hence, this technology can be used in AC charge control of electric vehicles

Integrated circuit interface for artificial skins

Artificial sensitive skins are intended to emulate the human skin to improve the skills of robots and machinery in complex unstructured environments. They are basically smart arrays of pressure sensors. As in the case of artificial retinas, one problem to solve is the management of the huge amount of information that such arrays provide, especially if this information should be used by a central processing unit to implement some control algorithms. An approach to manage such information is to increment the signal processing performed close to the sensor in order to extract the useful information and reduce the errors caused by long wires. This paper proposes the use of voltage to frequency converters to implement a quite straightforward analog to digital conversion as front end interface to digital circuitry in a smart tactile sensor. The circuitry commonly implemented to read out the information from a piezoresistive tactile sensor can be modified to turn it into an array of voltage to frequency converters. This is carried out in this paper, where the feasibility of the idea is shown through simulations and its performance is discussed.Gobierno de España TEC2006-12376-C02-01, TEC2006-1572

Design of a ROIC for scanning type HgCdTe LWIR focal plane arrays

Design of a silicon readout integrated circuit (ROIC) for LWIR HgCdTe Focal Plane is presented. ROIC incorporates time delay integration (TDI) functionality over seven elements with a supersampling rate of three, increasing SNR and the spatial resolution. Novelty of this topology is inside TDI stage; integration of charges in TDI stage implemented in current domain by using switched current structures that reduces required area for chip and improves linearity performance. ROIC, in terms of functionality, is capable of bidirectional scan, programmable integration time and 5 gain settings at the input. Programming can be done parallel or serially with digital interface. ROIC can handle up to 3.5V dynamic range with the input stage to be direct injection (DI) type. With the load being 10pF capacitive in parallel with 1MΩ resistance, output settling time is less than 250nsec enabling the clock frequency up to 4MHz. The manufacturing technology is 0.35μm, double poly-Si, four-metal (3 metals and 1 top metal) 5V CMOS process

Fully equipped half bridge building block for fast prototyping of switching power converters

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Development of an Oxygen Saturation Monitoring System by Embedded Electronics

Measuring Oxygenation of blood (SaO2) plays a vital role in patient’s health monitoring. This is often measured by pulse oximeter, which is standard measure during anesthesia, asthma, operative and post-operative recoveries. Despite all, monitoring Oxygen level is necessary for infants with respiratory problems, old people, and pregnant women and in other critical situations. This paper discusses the process of calculating the level of oxygen in blood and heart-rate detection using a non-invasive photo plethysmography also called as pulsoximeter using the MSP430FG437 microcontroller (MCU). The probe uses infrared lights to measure and should be in physical contact with any peripheral points in our body. The percentage of oxygen in the body is worked by measuring the intensity from each frequency of light after it transmits through the body and then calculating the ratio between these two intensities

Design and Implementation of an RNS-based 2D DWT Processor

No abstract availabl