Design and Implementation of LED Display Screen Controller Based on STM32 and FPGA

2012 ◽  
Vol 268-270 ◽  
pp. 1578-1582
Author(s):  
Chi Zhang ◽  
Xiao Guang Wu ◽  
Cheng Jun Zhang
Keyword(s):  
Data Transmission ◽  
Controller Design ◽  
Typical Case ◽  
Excellent Performance ◽  
Point Light Source ◽  
Drive Unit ◽  
System A ◽  
Ping Pong ◽  
Point Light ◽  
Sd Card

In order to realize point-light-source and hurdle lamp LED displays system, a kind of LED display screen controller design based on FPGA and STM32 is introduced by this paper. This design can quickly and easily receive display the data from USB, Ethernet and SD card interfaces through the STM32 processor, and use FPGA to realize data transmission throughput big operation of stable display by double RAM Ping-Pong operation This paper gives drive unit timing for TM1809 series LED drive chip as typical case. This design has applied to LED display controller with stability of reading data and excellent performance.

A confocal laser scanning microscope for fluorescence and reflection at video rates

1989 ◽  
Vol 47 ◽  
pp. 134-135
Author(s):  
P.M. Houpt ◽  
A. Draaijer
Keyword(s):  
Light Source ◽  
Laser Scanning ◽  
Focal Point ◽  
Confocal Laser Scanning Microscope ◽  
Confocal Laser ◽  
Point Light Source ◽  
Volume Of Interest ◽  
Ion Laser ◽  
Point Light ◽  
Point Detector

In confocal microscopy, the object is scanned by the coinciding focal points (confocal) of a point light source and a point detector both focused on a certain plane in the object. Only light coming from the focal point is detected and, even more important, out-of-focus light is rejected.This makes it possible to slice up optically the ‘volume of interest’ in the object by moving it axially while scanning the focused point light source (X-Y) laterally. The successive confocal sections can be stored in a computer and used to reconstruct the object in a 3D image display.The instrument described is able to scan the object laterally with an Ar ion laser (488 nm) at video rates. The image of one confocal section of an object can be displayed within 40 milliseconds (1000 х 1000 pixels). The time to record the total information within the ‘volume of interest’ normally depends on the number of slices needed to cover it, but rarely exceeds a few seconds.

scholarly journals A Study on Development of Engine Fault Diagnostic System

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Hwa-seon Kim ◽  
Seong-jin Jang ◽  
Jong-wook Jang
Keyword(s):  
Data Transmission ◽  
Diagnostic System ◽  
The Self ◽  
System Management ◽  
Diagnostic Code ◽  
Quick Response ◽  
System A ◽  
Message Structure ◽  
To Receive ◽  
Engine Condition

This study implemented a mobile diagnosing system that provides user-centered interfaces for more precisely estimating and diagnosing engine conditions through communications with the self-developed ECU only for industrial CRDI engine use. For the implemented system, a new protocol was designed and applied based on OBD-II standard to receive engine data values of the developed ECU. The designed protocol consists of a message structure to request data transmission from a smartphone to ECU and a response message structure for ECU to send data to a smartphone. It transmits 31 pieces of engine condition information simultaneously and sends the trouble diagnostic code. Because the diagnostic system enables real-time communication through modules, the engine condition information can be checked at any time. Thus, because when troubles take place on the engine, users can check them right away, quick response and resolution are possible, and stable system management can be expected.

Design of SD Card Driver and Tiny FS for Multi-Process Micro-Kernel Embedded OS on ARM

2013 ◽  
Vol 756-759 ◽  
pp. 4207-4211
Author(s):  
Bo Qu
Keyword(s):  
File System ◽  
Device Driver ◽  
Embedded Operating System ◽  
Tool Chain ◽  
Embedded Os ◽  
Design And Implementation ◽  
System A ◽  
Technical Details ◽  
Sd Card ◽  
Key Techniques

This paper describes the design and implementation of SD card driver and tiny file system for multi-process micro-kernel embedded operating system on ARM in technical details, including structure of device driver, key techniques of designing SD card driver, architecture of the tiny file system, a brief description of its designing and a demo example. The SD card driver and tiny FS are implemented with GNU tool chain by the author of this paper. Practice proves that the system can be used for not only embedded application developments but also related curriculum teaching.

Neuron Optimization Based PID Approach for Cutting Force Control

2006 ◽  
Vol 315-316 ◽  
pp. 85-89
Author(s):  
S. Jiang ◽  
Yan Shen Xu ◽  
J. Wu
Keyword(s):  
Neural Network ◽  
Controller Design ◽  
Open Loop ◽  
Network Control ◽  
Neural Network Control ◽  
System A ◽  
The Neural Network ◽  
Nc Milling ◽  
Hidden Layer ◽  
Control Principle

To improve the cutting efficiency, one of key approaches is to control with constant force in the full depth working condition. And the controller design is vital to realize the real-time feasibility and robustness of the system. A neuron optimization based PID approach is proposed in this paper and adopted in the NC cutting process. This approach optimizes the parameters of PID controller real-timely with the neural network control principle. It not only overcomes the mismatch of the open-loop system model which occurred in constant PID control, but also solves the contradiction between the calculation speed and precision in the neural network which caused by the node choosing of the hidden layer. At last, the simulation has been carried out on a NC milling machine to prove the validity and effectiveness of the proposed approach.

scholarly journals Light Structure from Pin Motion: Geometric Point Light Source Calibration

2020 ◽  
Vol 128 (7) ◽  
pp. 1889-1912
Author(s):  
Hiroaki Santo ◽  
Michael Waechter ◽  
Wen-Yan Lin ◽  
Yusuke Sugano ◽  
Yasuyuki Matsushita
Keyword(s):  
Light Source ◽  
Point Light Source ◽  
Geometric Point ◽  
Point Light

A Neural Net for Reconstructing 3-D Images of Object Surfaces

Perception ◽  
1997 ◽  
Vol 26 (1_suppl) ◽  
pp. 368-368
Author(s):  
R Stanikunas ◽  
H Vaitkeviius
Keyword(s):  
Spatial Position ◽  
Object Location ◽  
Neural Net ◽  
Fixation Disparity ◽  
Single Object ◽  
Object Surface ◽  
Point Light Source ◽  
Random Dot Stereograms ◽  
Exact Position ◽  
Point Light

There are some algorithms for reconstructing a 3-D surface from two 2-D images. Usually these algorithms are different for shaded objects and for 3-D surfaces from random-dot stereograms. We here propose a neural net for the reconstruction of images of such objects. Two arrays (matrices) of photosensitive elements act as inputs to the neural net. The real 3-D object (shaded sphere and planes) illuminated by a point light source produces two images in the plane of these matrices. The information from photomatrices is processed by many independent channels. Each channel obtains information only from a delimited area of the matrices. This area is called the receptive field (RF) of the channel. RFs of the different channels overlap. If RFs have the same coordinates on the two matrices, they form a pair of corresponding RFs. The information obtained from this pair is integrally processed, determining both the spatial position of the single object surface fragment and its averaged brightness. Two subsystems (coarse and fine) are used to determine the spatial position. First, the orientations of the matrices are chosen so as to bring down to a minimum the integral differences of light intensities between the images in all corresponding RFs. The coarse subsystems determine the disparities of the corresponding RFs, taking into account the orientation (fixation disparity) of the matrices. The fine subsystems calculate the centroids of the images within the RFs and the averaged intensity across the RFs. This information is used to calculate the exact position of the fragment in space and the averaged brightness. All calculations are carried out by neuron detectors sensitive to object location in space. These neurons form the output layer of the neural net.

Data Transmission System of Rotating Electric Field Mill Network Using Microcontroller and GSM Module

2013 ◽  
Vol 64 (4) ◽  
Author(s):  
Zainuddin Nawawi ◽  
Muhammad Abu Bakar Sidik ◽  
Mook Boon Kean ◽  
Hussein Ahmad ◽  
Zolkafle Buntat ◽  
...  
Keyword(s):  
Electric Field ◽  
Data Transmission ◽  
Voltage Divider ◽  
Transmission System ◽  
Wireless Data ◽  
Alert System ◽  
Function Generator ◽  
System A ◽  
Wireless Data Transmission ◽  
Data Transmission System

Lightning is an environmental phenomena that cause many fatalities and property destructions in Malaysia since the country is located in the high isokeraunic area. To reduce the fatalities an alert system should be developed. The alert system can consist of several Rotating Electric Field Mill sensors which are installed in spread. Data from the sensors must be gathered in a data centre building for observation,  analysis, and triggering an alert signal. Therefore, the objective of this work is to develop a data transmission system by using a wireless method. The wireless data transmission system consists of a microcontroller, voltage divider, and GSM module. Hardware and software development is carried out to achieve the objective. Furthermore, to test the transmission system a function generator is connected to the analog digital converter input of the microcontroller. By varying the magnitude of the function generator output an observation on data transmission is carried out. It is found that the magnitude of receiving data which is displayed on the website is exactly the same with the sent data. In here in lab wireless data transmission system devices and a website to observe the transmitted data from Rotating Electric Field Mill sensors has been successfully developed.

Heavy metals in an impacted wetland system: A typical case from southwestern China

2007 ◽  
Vol 387 (1-3) ◽  
pp. 257-268 ◽  
Author(s):  
Xiangyang Bi ◽  
Xinbin Feng ◽  
Yuangen Yang ◽  
Xiangdong Li ◽  
Grace P.Y. Sin ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Typical Case ◽  
Southwestern China ◽  
System A ◽  
Wetland System
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