963 resultados para Hardware
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In order to realize the steady-state droplet evaporation, image feedback control system is designed based on DSP. The system has three main functions: to capture and store droplet images during the experiment; to calculate droplet geometrical and physical parameters such as volume, surface area, surface tension and evaporation velocity at a high-precision level; to keep the droplet volume constant. The DSP can drive an injection controller with the PID control to inject liquid so as to keep the droplet volume constant. The evaporation velocity of droplet can be calculated by measuring the injected volume during the evaporation. The structure of hardware and software of the control system, key processing methods such as contour fitting and experimental results are described.
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A brief summary of H bridge non-isolated DC-DC converter and operation principles is presented in this paper. A small signal model of the ideal converter in continuous current mode is proposed and simulation results of the converter are given. The hardware structure of digital power supply controller based on TMS320F2808 MCU is introduced. H TMS320F2808MCU
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The HIRFL-CSR EVME bus controller, which runs Embedded Linux OS, is based on AT91RM9200 microprocessor, whose core is ARM920T. There are hardware interface electronic circuits connecting AT91RM9200 microprocessor and Security Digital Memory Card (SD Card). This article analyzes Operation System kernel and Linux device drivers structure, designs SD Card driver based on Embedded Linux, which runs on AT91RM9200 microprocessor.(HIRFL-CSR)ARM920TAT91RM9200,LinuxAT91RM9200Security Digital MemoryCard(SD),Linux,LinuxAT91RM9200SD
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A read-out and data acquisition system for the outputs of multi-channel spectroscopy amplifiers is introduced briefly in this paper.The 16-channel gating integrator/multiplexer developed by us and PXI-DAQ card are used to construct this system.A virtual instrument system for displaying,indicating,measuring and recording of output waveform is accomplished by integrating the PC,hardware,software together flexibly based on the Lab Windows/CVI platform in our read-out and data acquisition system.In this system,...16/PXI-DAQLab Windows/CVI,,,ADC16,,,
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This paper present that the system can acquire the remote temperature measurement data of 40 monitoring points,through the RS-232 serial port and the Intranet.System s hardware is consist of TI s MSP430F149 mixed-signal processor and UA7000A network module.Using digital temperature sensor DS18B20,the structure is simple and easy to expand,the sensors directly send out the temperature data.MSP430F149 has the advantage of ultra-low-power and high degree of integration.Using msp430F149,the multi-branch multi-p...RS-232Intranet,40TIMSP430F149UA7000ADS18B20,,,MSP430F149,,,,Microsoft Visual C++6.0440
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FPGA and dedicated micro-controller chips are widely used in HIRFL-CSR monitor and control systems.This paper discusses the characteristics of HIRFL-CSR s dedicated micro-controllers and it s requirement for micro-controllers. Using programmable technology and Nios- processor,we have designed and implemented a reconfigurable embedded micro(controller in altera cyclone2c35f484 FPGA. The micro-controller which has low hardware cost and 185 MHz maximum operating frequency can replace the dedicated micro-cont...,Nios-,altera-cycloneII2c35f484,185MHz,,
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This paper discuss a Ion-pump Power Supply control system making use of RS232 series bus and Intranet.The system s hardware VAC800 is composed of MSP430F149 mixed-signal processors produced by TI and UA7000A network model.MSP430F149 has advantages of ultra-low-power and high-integration.The Ion-pump Power Supply control system has the characteristics of strong function,simple structure,high reliability,strong resistance of noise,no peripheral chip,etc.Visual studio 2005 is used to design the system s softwa...RS-232Intranet,VAC800TIMSP430F149UA7000AMSP430F149,,,,visual studio 2005
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A dynamic measurement system was developed by the Institute of Modern Physics (IMP) for the dipole prototype of Rapid Cycle Synchrotron (RCS) of China Spallation Neutron Source (CSNS). The repetition frequency of RCS is 25 Hz. The probe is a moving arc searching-coil, and the data acquisition system is based on the dynamic analysis modular of National Instrument. To get the error of high order harmonics of the field at basic frequency, the hardware integrator is replaced by a high speed ADC with software filter and integrator. A series of harmonic coefficients of field are used to express the varieties of dynamic fields in space and time simultaneously. The measurement system has been tested in Institute of High Energy Physics (IHEP), and the property of the dipole prototype of RCS has been measured. Some measurement results and the repeatability of system are illustrated in this paper.
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HIRFL-CSRHeavy Ion Research Facility at LanZhou-Cooling Storage RingCSRCSRARMFPGA100MbpsCSRARMFPGA(1) (2)LinuxFPGAPWMCSR
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