Search

This system based on embedded technology, MMS wireless communication, etc. Various kinds of modern technology, design a kind of based on GPRS MMS remote monitoring alarm system, this system chooses LPC2132 chip as embedded processor, serial ports, camera, GPRS and infrared pyroelectric sensor module and other hardware. Main funtions as follows: when someone illegally broken into specific space abnormal happens, infrared pyroelectric sensor embedded processor immediately trigger caused disruption, the camera automatically shooting scene image, and transferred to the embedded processor module, embedded processor calls AT instructions through GPRS networks will the collected pictures sent to specify users mobile phone. Users can call or send messages to the system for pictures, but also through the mobile terminal control the system protection and removal. System software embedded in part using development platform ADS development, the key technology was embedded processor interrupt trigger, user instruction processing, control the acquisition and sending MMS etc. This paper analyses the working principle, AT GPRS directive system structure of use, embedded in space, thus realize user of real-time monitoring and alarm.

This smart car control system by MC9S12G128 controller as the core, the use of a row of 18 laser tubes and 6 receiving tube as the path recognition sensor, through MC9S12G128 I / 0 interface for sensor signal, and use the feature extraction method to extract the track type, realization of the starting line, cross line recognition. According to road information, the design adopts fuzzy control algorithm of output PWM wave to control the gear steering, complete control of the direction of the car, the car speed extracted with the use of photoelectric encoder, comparing with the current set point to get speed deviation, and output PWM pulse is obtained by using the PID algorithm to control the motor to adjust the car speed, complete the closed-loop control of the car movement speed. Through the experiment, the system is designed to achieve the desired effect.

Based on the research of the Hadoop cloud platform, this paper consisting of four servers in the network environment, focusing on four computers deployment environment, design and node arrangement, the Hadoop installation and configuration, realize the Hadoop cloud platform to build.

This paper discusses the application of cloud computing technology to store large amount of data in agricultural remote training video and other multimedia data, using four computers to build a Hadoop cloud platform, focus on the Hadoop Distributed File System (HDFS) principle and file storage, to achieve massive agricultural multimedia data storage.

Blended learning has become an important content of teaching reform in colleges and universities. Blended learning model based on network teaching platform, will provide a new train of thought for the reform of college teaching. This study intends to combine computer agricultural application, on the basis of the basic principle of blended learning, Study the key problems of blended learning and the content of the blended learning design, to provide a reference for design of three-dimensional classroom three-dimensional class under the existing resources environment

Control core of Intelligent automatic patrol car track (photovoltaic group) uses G128 chip, which function modules include: laser sensor, speed control module, the servo control module. The basic principle is that the control center sends a signal to the laser sensor module, which controls laser tube launching and receives data by laser receiver returning. According to the data of the receiver, the core module synchronously controls servo module and the speed module. The main program uses a PID algorithm by C language.

In astronomical orientation, we usually choose the sun, the moon as observation objects, using the theodolite to obtain the horizontal and vertical scale readings as the crosshair theodolite and astral edge are tangent. This operation is subjective to human disturbance, affecting the orientation precision afterwards. Comparing to the previous method, the method of image processing is much simple in operation, and reduces the manual intervention as long as the sun and the moon are within the scope of the CCD imaging. After imaging, we first extract the object centroid coordinates from the embedded image module, and then according to the imaging model, we get the angle of visual axis interacts with the center line of the stars. This article analyzes the main characteristic of the sun-moon image and discusses the various circumstances image centroid algorithm for fitting. The algorithm is able to separate the sun and moon from complex background environment. Besides, even in the cases of the poor quality of the images, such as stars appear some incompleteness, low star brightness, or fuzzy boundaries, the algorithm can still locate the edge effectively with better fitting.

Network monitoring system is a collection about consisting of a set of tools for network monitoring and control, a combination of organic is used to manage networks and ensure the normal operation of the network software and hardware. It is not only to improve the efficiency of network management, but also continue to monitor the network, creating blogs, research and analysis of network status.