Cypress Semiconductor CY7C028V Manual do Utilizador descarregar pdf (Página 2)

Middle-East J. Sci. Res., 19 (12): 1623-1629, 2014

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increase the setup costs and the costs to maintain the

acquisition systems, such as regular maintenance costs,

system updates, etc.

Therefore, the central server has to be eliminated for

a real-time system. The closest to this idea is published in.

In this system, a reliable bidirectional Point-to-Point

Protocol (PPP) link for real-time control and surveillance

via a GSM network is formed. However, there is still no

effort to minimize the operational costs (including the

costs to transfer a large amount of data). In addition, this

system is based on an industrial PC, thus making it an

expensive solution. Interaction with the embedded unit is

also an important issue.

In, an embedded PC card placed on the Internet Fig. 1: Genral diagram of a data-acquisition and control

allows limited interaction through commands sent through system

Transmission Control Protocol/IP (TCP/IP) and User

Datagram Protocol. needs to relay the acquired information to the

In this paper, we propose a GPRS-based portable requesting clients. The clients also need to send

low-cost data-acquisition system, which can establish a commands. If necessary, this is implemented through a

reliable bidirectional connection for data-acquisition. server and then, an enormous amount of data transfer time

The proposed system uniquely reduces the costs would be consumed. Thus, alternative methods need to

occurring from frequently requested data and eliminates be explored.

the need for a well-established server. The system uses a Using the current based on eight MCU embedded

dummy server for static information, thus optimizing the gas measuring devices though to a certain extent to meet

transfer of large data. The user can directly log in and this demand flow testing, but can't adapt to increasingly

interact with the embedded device in real time without the complex monitoring system expansion in man-machine

need to maintain an additional server. The system is interface requirements, particularly demanding higher,

modularly built, allowing different modules to be added. networked degree deepen, management equipment

In addition, it is flexible to accommodate a wide range of under the trend of more intelligent, low microcontroller

measurement devices with appropriate interfaces. is ambition. Along with the development of the

In Section II, we will introduce the details of the afore microelectronics technology, 16 and 32 bits embedded

mentioned system. In Section III, we will provide an microprocessors gradually become the mainstream of the

example that will introduce some of the capabilities of the embedded system design. This kind of high end

system using a collection of modules. In this paper, a processor has completely can meet the small low energy

camera, a Global Positioning System (GPS) and a intelligence equipment design requirements. The coal gas

temperature chip are connected to the embedded system detection terminal equipment's main innovation point is

to demonstrate its operation. The operational features are realized with terminal testing equipment control operator

presented, which are needed to be considered for practical of wireless communication, terminal equipment can follow

applications. Section IV presents the conclusion. the propulsion and convenient excavating of gas on cloth

Interactive Data Acquisition System: The general site staff of gas concentration status and can give PC

principles of Internet-based control systems have been industrial PC's site automatic control to provide real-time

modelled in. Interactive Internet-based systems provide accurate control information, thus in the warning of the

a way to monitor and adjust using standard web reliability of the real-time and control have greatly

browsers and a PC. The target systems can be monitored improved.

and controlled independent from the location and the Qt ("cute", or unofficially as Q-T cue-tee) is a

platform since standard web browsers can be used on the cross-platform application framework that is widely used

client side. for developing application software with a graphical user

A typical data-acquisition system is made up of Interface (GUI) (in which cases Qt is classified as a widget

three components connected to each other via the toolkit) and also used for developing non-GUI programs

Internet, as shown in Fig. 1. The data-acquisition system such as command-line tools and consoles for servers.

nets; points Terminal equipment can not only inform on-

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