• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.18 no.11
• /
• pp.1754-1766
• /
• 1993

The application of VXIbus system, an Industry standard, is rapidly spreading with its ability to offer the easiness of integration from GPIB and the fast data transmission from VMEbus system. Compared with VXIbus Register Based Device, VXIbus Message Based Device has a drawback In the aspect of speed. But it is possible to utilize high level ASCII commands to control a Message Based Device, therefore system integration is much easier with Message Based Device than with Register Based Device. And, the FFT analyzer is an instrument for signal analysis which can be inexpensively implemented to be fast and have high resolution. Its wide ability of analysis presents numerous application. So, it is necessary to apply VXIbus system to FFT analyzer. In this paper, the implementation of FFT analyzer is performed using a DSP module and by implementing all A/D conversion circuit and a control module which performs VXIbus interface. The device can be controlled by Slot0 Commender which supports VXIbus Shared Memory Protocol through VXIbus.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.17 no.11
• /
• pp.1219-1227
• /
• 1992

VXIbus is a standard for compatibility of instruments of multi-vendors and originated from the VMEbus. The devices for implementing VXIbus system can be categorized into the register based device and the message based device. In this paper we organized the A/D conversion module and the slot0 module, which form the register based VXIbus subsystem. The A/D conversion module is used as a digital voltmeter and LAN is used for communication between an external control computer and the slot0 module. The SCPI(Standard Commands for Programmable Instruments), which is a standard language for instruments, is transmitted from the external control computer to the slot0 module as the ASCII form, and then to the A/D conversion module after changing to the binary digit command. From the experiment. We verified that the measured voltage can be observed on external control computer and user interface can be improved by the modified graphic processing.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.18 no.9
• /
• pp.1332-1347
• /
• 1993

Existing instruments are composed independently according to their function and user constructed instrumentation system with those instruments. But in the late 1980s VXI bus enables to construct instrumentation system with various modular type instruments. For an VXI bus system with the word serial protocol, an increase of data size can degrade the system performance. In this paper shared memory protocol is proposed to overcome performance degradation. The shared memory protocol is analyzed using the GSPN and compared with that of the word serial protocol. It is shown that the shared memory protocol has a better performance than the word serial protocol. The VXI bus message based-system with the proposed shared memory protocol is constructed and experimented with signal generating device and FFT analyzing device. Up to 80 KHz input signal the result of FFT analysis is accurate and that result is agree with that of conventional FFT analyzer. In signal generating experiment from 100 KHz to 1.1 GHz sine wave is generated.

• Electronics and Telecommunications Trends
• /
• v.5 no.4
• /
• pp.145-161
• /
• 1990

현재 계측기산업은 빠른 속도의 발전을 거듭하고 있는 전자산업에서의 하나의 핵심분야로 나타나고 있는바, 단일 계측기의 질적 향상에서 탈피하여 컴퓨터와 계측장비를 연결해 계측절차를 간소화 한 CAT(Computer Aided Test)가 등장하고 있으며, 또한 계측기 분야의 신혁명이라고 불리는 표준화된 VXIbus와 MMS 등이 개발되고 있어 이 분야의 새로운 장을 열고 있다. 오실로스코프, 스펙트럼 애널라이저 등 단일 계측장비의 성능 제고가 지난 80년대의 업적이라면 향후 전개될 90년대는 계측시스템 간의 통합화와 표준화라고 볼 수 있다.기술적으로 개방되고, 모듈화 된 계측기 표준에 대한 필요성이 점차로 증가함에 따라 개발된 VXIbus시스템은 모듈기기의 개방구조로서 H/W 및 S/W로 구성되어 있으며, 현재 많이 사용되고 있는 VMEbus를 계측기기에 적합하도록 확장시킨 것이다. 분문에서는 계측시스템의 일반적인 발전추세를 비롯하여 VXIbus의 세부구조, 전기적 기능, 응용 등의 세부내용을 나타내고 있다.

• The Transactions of the Korean Institute of Electrical Engineers D
• /
• v.49 no.1
• /
• pp.10-17
• /
• 2000

Recently, as the field of cyclotron application is to be wider, to inject the beam whree the user want to is getting more important. But since it is not the easy way to describe the model equation of cyclotron, it could be operated by only operator's experiences. In this paper, we suggest the cyclotron controller using the fuzzy logic and the genetic algorithm. The proposed controller was verified in useful by applying to the cyclotron's beam line. In the experiment the measured results were obtained by VXIbus and the control algorithm was performed by LabWindows/CVI.

• The Journal of the Acoustical Society of Korea
• /
• v.14 no.2
• /
• pp.30-39
• /
• 1995

In this paper, study on implementation of FFT analyzer applied to CAT, A/D conversion module, DSP module and VXIbus interface module are implemented in hardware and calculation program and control software are implemented in DSP module and VXIbus interface module, respectively. The control of the modules using PC is realized in software. The real time bandwidth of the FFT analyzing device is 100KHz. At sampling rate of 200KHz and with 2048 point FFT, the result of applying sine, triangular and rectangular wave of 20KHz to FFT analyzing device is compared with the FFT analyzed results of Hewlett-Packard 3562A dynamic output range of -40dBV- +30dBV, correct results are obtained and results of applying 10KHz, 20KHz and 50KHz input are compared and the correct values are obtained.

• Proceedings of the KIEE Conference
• /
• 1996.07b
• /
• pp.953-955
• /
• 1996

For organizing a flexible and reasonable measuring system, it is necessary that one should not only understand the process itself but also choose an adequate system. In this paper, we want to show a system of measuring and analyzing diesel engine's performance which is capable of producing a report of a certain format as well as gathering, analyzing and managing data. The system was designed by VXIbus as an all-in-one. It was also proven by a real field test through the Guam diesel power plant, which was designed and constructed by Hanjung.