• 전자공학회논문지D
• /
• 제35D권7호
• /
• pp.40-47
• /
• 1998

This paper presents the physiological signal processing CMOS one chip for transmitting human bodys small electrical signals such as electrocardiogram(EKG) or electromyogram(EMG) and the external system for receiving signals was implemented by the commercial ICs. For simultaneous four-subject four-channel telemetry, a new enfored synchronization techniqeu using infrared bi-directional communication has been proposed. The telemeter IC with the size of 5.1*5.1mm$^{2}$ has the following functions: receiving of command signal, initialization of internal state of all functional blocks, decoding of subject-selection signal, time multiplexing of 4-channel modulated physiological signals, transmitting of telemetry signal to external system and auto power down control. The newly designed synchronized oscillator with low supply voltage dependence in the telemeter IC operates at a supply voltage from 4.6~6.0V and the nonlinearity error of PIM modulator was less than 1.2%F.S(full scale). The power saving block operates at the period of 2.5ms even if the telemetry IC does not receive command signal from external system for a constant time.

• 한국항공우주학회지
• /
• 제39권1호
• /
• pp.69-75
• /
• 2011

우리나라는 우주 개발의 일환으로 달 탐사를 위한 달 탐사선과 달 착륙선의 발사를 계획하고 있다. 향후 멀티미디어 기반의 달 탐사 정보를 전송하기 위해서는 대용량 Telemetry 데이터를 전송하기 위한 통신 시스템을 구축하는 것이 필요하다. CCSDS 표준에서는 신뢰성 있는 원거리 심우주 통신 시스템을 위한 ARQ 기법으로 Deferred NAK mode를 권고하고 있다. 본 논문에서는 달 탐사선과 지상국 및 우주 환경 모델을 반영하여 Deferred NAK mode 통신 시스템 시뮬레이터를 구현하며, 시뮬레이터에는 대용량 Telemetry 데이터를 전송하기에 적합한 변조 방식과 터보 부호화 기법을 사용한다. 시뮬레이션을 통해 Telemetry 데이터의 전송 성능을 분석한다.

• 한국항공우주학회지
• /
• 제31권6호
• /
• pp.96-101
• /
• 2003

과학로켓3호(KSR-III) 비행시험시에 탑재용 원격측정장치는 로켓의 서브시스템들의 실시간 상태 및 각종 센서 자료를 획득하여 무선으로 전파 통신을 하고 지상에서 로켓을 추적하면서 비행중인 원격측정 데이터를 실시간으로 획득하고 복원하는 것은 로켓의 비행을 분석하는데 필수적이다. 또한 실시간으로 자료처리된 원격측정자료들은 네트워크를 통해 임무통제센터로 보내져 로켓의 비행 궤도를 도시하고 동시에 비행통제원이 로켓의 비행종단명령을 수행하기 위한 중요한 판단자료를 제공한다. 본 논문에서는 과학로켓3호 비행시험에 적합한 원격측정 수신과 관련된 운용기법 및 실시간 자료처리 시스템 개발에 관하여 기술하였으며 원격측정 수신결과를 분석하였다. 실제 비행시험시에 성공적으로 원격측정 수신 및 실시간 자료처리 임무를 완수하였다.

• 한국항행학회논문지
• /
• 제24권2호
• /
• pp.134-141
• /
• 2020

원격측정 시스템은 무인기, 위성 발사체 등의 비행체 개발과정에서 비행 데이터 수집과 모니터링을 위해 비행체 내 다양한 신호를 계측하여 지상으로 전송하는 통신시스템이다. 최근 무선통신 기술의 발전으로 비행 데이터의 전송 과정에서 일어날 수 있는 보안 위협에 대응하기 위해 원격측정 시스템의 암호화 기술 적용은 중요해지고 있다. 따라서 본 논문에서는 원격측정 시스템의 암호화 적용을 위해 국가 표준 암호 알고리즘인 ARIA-256의 적용 방법을 제안하고 구현하였다. 블록 오류 확산과 원격측정 프레임의 특성을 고려하여 CTR (counter) 모드를 응용하고, 위성통신 표준화 기구(CCSDS)에서 권장하는 리드솔로몬 코드를 적용할 수 있도록 프레임을 구성하여 암호화하였다. ARIA-256 알고리즘과 암호 프레임은 FPGA(filed programmable gate array)로 구현하였고 시뮬레이션과 하드웨어 검증 시스템을 통해 연속성 있는 프레임의 암호화를 확인하였다.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2008년도 춘계학술대회 논문집
• /
• pp.663-664
• /
• 2008

• 한국군사과학기술학회지
• /
• 제14권6호
• /
• pp.1159-1165
• /
• 2011

Telemetry techniques of rats have been used for assessing safety pharmacology of drugs and chemicals. Biological signals including blood pressure and heart rate measured under anesthesia were significantly different from those obtained under normal conditions. The stress of restraint in awake animals can also affect the accuracy of physiological evaluation. This paper details the surgery required to allow key cardiovascular parameters to be determined. The telemetric measurement of cardiovascular parameters such as blood pressure, heart rate, electrocardiograph(ECG) established. We carried out the continuous monitoring of cardiovascular parameters using the telemetry system in F344 rats. During the measurement, no significant changes were observed in the heart rate and blood pressure. ECG signals and body temperature were also constant during the measurement of biological signals. With the results of this study, we conclude that this telemetry system can be applied usefully for the assesment of biological parameters in the rats.

• 한국군사과학기술학회지
• /
• 제22권5호
• /
• pp.616-624
• /
• 2019

In order to understand flying aircraft, satellite, missile, etc, a telemetry ground system is used to receive, record, and process the transmitted radio signal from vehicles. In some cases, a line-of-sight communication is not possible along to the trajectory of vehicles, and multipath fading result in a shade area of communication. A number of telemetry ground systems are installed to overcome this limitation, and acquire the transmitted signal seamlessly. The telemetry signals received by multiple independent ground systems have independent probability of errors since they experienced their own communication channels. In other words, we can exploit the independent error characteristics of received signals by processing them in a hybrid method. The optimum hybrid post-process method is proposed in this study, and applied to process telemetry signals acquired from flight tests.

• 대한의용생체공학회:학술대회논문집
• /
• 대한의용생체공학회 1997년도 춘계학술대회
• /
• pp.295-298
• /
• 1997

We developed the system that enables patients to be treated at home during their daily life through digital telemetry and public communication line. This system records and transfers ECG signals through wireless digital telemetry unhindering the patient's normal activities in long-term recording, and transmits the processed data, which enables real-time remote examination via ISDN phone line. Patient's image, voice, and transmitted signals are transferred to medical experts in remote medical center interactively.

• 한국산업정보학회:학술대회논문집
• /
• 한국산업정보학회 2001년도 춘계학술대회논문집:21세기 신지식정보의 창출
• /
• pp.252-255
• /
• 2001

The purpose of this study is to realize the real time monitoring ECG telemetry system applied by the telemetry unit, in which transmission is made through the electronic wave and reception is made through the light, and by the wavelet algorithm as well. A light receiver via existing telemetry unit which is based on baseband, the reception length was 50cm, but when the frequency modulation is used, the reception length is extended to 3m. In addition to this, we have found that the full-duplex method of transmission became available by using dual-mechanism.

• 센서학회지
• /
• 제18권1호
• /
• pp.63-71
• /
• 2009

It is said that the desirable bio-signal measurement and stimulation system should be an implantable type if the several problems such as biocompatibility, electrical safety, and so on are overcome. In addition to the biocompatibility issue, a robust RF communication and a stable electrical power source for the implantable bio-signal measurement and stimulation system are very important matters. In this paper, a wireless telemetry system which adopts the FCC's approved MICS (medical implant communication service) protocol and a wireless power transmission has been proposed. The proposed system composed of a base station (BS) and an implantable medical device (IMD) has the advantages that the interference with other RF devices can be reduced by the use of the specially assigned MICS frequency band of 402.MHz to 405 MHz. Also, the proposed system includes various functions of a multi-channel bio-signal acquisition and an electric stimulation. Since the electrical power for the IMD can be provided by the inductive link between PCB patterned coils, the IMD needs no battery so that the IMD can be smaller size and much less dangerous than the active type IMD which includes the internal battery. Finally, the validity as a wireless telemetry system has been demonstrated through the experiments by using the implemented BS and IMD.