FPGA-Based High Precision Illumination Measurement System: A Prototype Development and Evaluation

2014 ◽  
Vol 599-601 ◽  
pp. 944-947
Author(s):  
Xiu Zeng Yang
Keyword(s):  
High Resolution ◽  
Light Intensity ◽  
Measurement System ◽  
Logic Gate ◽  
Light Signal ◽  
Programmable Logic ◽  
Measuring Instrument ◽  
Prototype Development ◽  
System A ◽  
Illumination Measurement

The light is a most important natural resource for human to survive .Aiming at the shortcomings of the traditional light intensity measuring instrument ,a kind of high resolution illumination measurement system based on FPGA is designed ,which consists of special BH1750 light sensors and programmable logic gate array (FPGA) . A soft core Nios II is used as controller in the instrument, and BH1750 is put into use to acquire light signal .The testing results show that the design is feasible.

A New Method on Illumination Measurement to Dynamic and Static Light Sources

2011 ◽  
Vol 411 ◽  
pp. 203-207 ◽  
Author(s):  
Kun Qi Wang ◽  
Guang Qi Ren ◽  
Zhu Feng Shao
Keyword(s):  
Light Intensity ◽  
Light Source ◽  
Measurement System ◽  
National Standards ◽  
Luminous Intensity ◽  
Light Sources ◽  
Dynamic Measuring ◽  
Illumination Measurement ◽  
Gain Adjustment ◽  
Dynamic Gain

A novel measurement system for the dynamic and static light sources is designed in this paper. The method of dynamic gain adjustment measurement is proposed according to the national standards on luminous intensity of dynamic and static light sources. The method is achieved by the way that microcontroller controlled the analog switches to switch automatically in different ranges and adjust the gain automatically depend on the light intensity. By designing the overall structure of the system and using the dynamic gain adjustment method, the range of dynamic measuring illumination can be from 0.001 up to 2000 . The illumination measurement to static light source and the dynamic light source in the peak luminous intensity are achieved via the combination of interval control and dynamic gain adjustment.

High-resolution electron microscopy of Cu2O surfaces

1986 ◽  
Vol 44 ◽  
pp. 396-397
Author(s):  
V. Castano ◽  
W. Krakow
Keyword(s):  
High Resolution ◽  
Natural Extension ◽  
High Resolution Electron Microscopy ◽  
Point Of View ◽  
Initial Oxidation ◽  
System A ◽  
Resolution Electron ◽  
Surface Reconstructions ◽  
Atomic Surface ◽  
Au Thin Films

In non-UHV microscope environments atomic surface structure has been observed for flat-on for various orientations of Au thin films and edge-on for columns of atoms in small particles. The problem of oxidation of surfaces has only recently been reported from the point of view of high resolution microscopy revealing surface reconstructions for the Ag2O system. A natural extension of these initial oxidation studies is to explore other materials areas which are technologically more significant such as that of Cu2O, which will now be described.

Two-panel LCOS-based projection system: a potentially compact high-resolution avionics display

2003 ◽  
Author(s):  
Gary D. Sharp ◽  
Jianmin Chen ◽  
Michael B. Robinson ◽  
John K. Korah
Keyword(s):  
High Resolution ◽  
Projection System ◽  
System A

scholarly journals High-Resolution Atmospheric Sensing of Multiple Atmospheric Variables Using the DataHawk Small Airborne Measurement System

2013 ◽  
Vol 30 (10) ◽  
pp. 2352-2366 ◽  
Author(s):  
Dale A. Lawrence ◽  
Ben B. Balsley
Keyword(s):  
High Resolution ◽  
Measurement System ◽  
Current System ◽  
Low Cost ◽  
Structure Constant ◽  
Turbulence Structure ◽  
Quality Of Data ◽  
Airborne Measurement ◽  
Atmospheric Measurement ◽  
Atmospheric Variables

Abstract The DataHawk small airborne measurement system provides in situ atmospheric measurement capabilities for documenting scales as small as 1 m and can access reasonably large volumes in and above the atmospheric boundary layer at low cost. The design of the DataHawk system is described, beginning with the atmospheric measurement requirements, and articulating five key challenges that any practical measurement system must overcome. The resulting characteristics of the airborne and ground support components of the DataHawk system are outlined, along with its deployment, operating, and recovery modes. Typical results are presented to illustrate the types and quality of data provided by the current system, as well as the need for more of these finescale measurements. Particular focus is given to the DataHawk's ability to make very-high-resolution measurements of a variety of atmospheric variables simultaneously, with emphasis given to the measurement of two important finescale turbulence parameters, (the temperature turbulence structure constant) and ɛ (the turbulent energy dissipation rate). Future sensing possibilities and limitations using this approach are also discussed.

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