Graduation Project Presentation

transcript

Wireless Accessibility to Local Measurements and Control in Industrial Processes> CSE 2007

Presentation Contents

●Project Overview

●Process Control Studio (PCS) Software

●PCS Software Mobile Edition

●Wireless Accessibility

●Ethernet Interface

●Data Acquisition

●Control

Goal of our Project

●Implementation of Distributed Process Control System

Wireless Industrial Monitoring

Project Block Diagram

Scenario

●Engineer connects local controller to processes

●Chooses input and output channel

Scenario

●Engineer forms a model on the software

●Our software: PCS (Process Control Studio)

●Model analogous to real-process

●Associate model parts to I/O channels on controller

●Load .pcs file to laptop or PDA

●Project Overview

●Ethernet Controller

●Data Acquisition

●Control

PCS Software>Process Control Studio

Process Control Studio (PCS) Software

●PCS Features

●PCS Alarming System

●PCS Data Base

PCS Features

●Attractive user interface

●Support two mode Design time mode

Run time mode

●Designing & Monitoring more than one

process at the same time

●Save and load Design process

●Failure notification

●Authentication

PCS Demo

PCS Alarming System

PCS alarming system

Visual notification●Flash

●Notification

window

Sound SMS

PCS Alarming System Demo

PCS Data Base

●Simple to use

●It improves the capabilities of the overall the system

●Able to trace the shortage in any component in the system & notify for making order

●It holds useful data about each component

●Store any alarm accrues In run time

PCS Data Base Demo

●Project Overview

●PCS Software MobileEdition

●Data Acquisition

●Control

PCS Mobile Edition>Personal Digital Assistant

Introduction

●.NET Compact Framework (.NET CF)

●Operating System Used in This Project

oWinCE 5 operating system .

Program Description

●Process Control Studio PDA Edition

oLight version of PCS

oRun Mode only

> Program Stages

●Loading

●Scaling

●Network Sockets

Program Sequence

●Project Overview

●PCS Software

●Control

●Data Acquisition

Wireless Accessibilty

●Wireless Standards●Basic Topologies

●Access Point Features

●Wireless-to-Ethernet Bridge

Wireless Networking

Wireless Networking overview

Wireless Networking StandardsStandard (Market Name)

802.11

(Wi-Fi)

802.15.1 (Bluetooth)

802.15.4

(ZigBee)

Application Focus

Web, e-mail, video

Cable replacement

Control and monitoring

Bandwidth 11 Mbps 1-3 Mbps 20 – 250 kbps

Transmission Range

100+ 20 (Class 2)

100+ (Class 1)

20-70,

100+(ext. amp.)

Success Metrics Speed flexibility

Cost, convenience Power, cost

We chose Wi-Fi

Modes of WLAN

Infrastructure ModeAd-Hoc Mode

TCP or UDP?

Access Point’s features

- Roaminghandshaking done by AP and OS of wireless device

- SecurityWEP: now obsolete

WPA-PSK: stronger keys

Roaming

Wireless-to-Ethernet Converter

●Wi-Fi compliant

●Up to 11 Mbps

●Protocols: TCP and UDP

●Security: WEP and WPA-PSK

Wireless-to-Ethernet Converter

●Airborne bridge has its own IP for configuration

●Transparency: to send/receive data, deal with IP of client

●Project Overview

●Data Acquisition

●Control

Ethernet Controller

Ethernet Interface

Ethernet Interface Hardware●Motorola MC9S12NE64 Microcontroller

- Features

●Demonstration Board (DEMO9S12NE64)

Ethernet Interface

Ethernet Interface Software

●OpenTCP TCP/IP Stack

●Main Application (PCSCP)

OpenTCP TCP/IP Stack●Structure

OpenTCP TCP/IP Stack

●Robustness – Portability

●Modularity

●Multitasking

●Operation

Main Application (PCSCP)

●Features

●Examples

PCSCP Transactions

Successful Transaction

PCSCP Transactions

Successful Transaction

PCSCP Transactions

Failed Transaction

●Project Overview

●Data Acquisition

●Control

Data Acquisition

Why “ Local Controller ” is needed ?

●It is needed to do:

Process Data Sampling

Process Control

Structure of

Local Controller

Why “ Data Acquisition ” is needed ?

●The Data Acquisition does: Sampling of the process data

Any Digital or Analog conversions

What is “ Data Acquisition “ ?

●It consists of 2 sub-modules:

1) Analog-to-Digital (ADC)

2) Digital-to-Analog (DAC)

●The ADC and DAC are controlled by the microcontroller

Data Preparation

Interfacing the Process with the Data Acquisition

●Process Input and Output

●Input is Control Action( Manipulated Variable)

●Output is Controlled Variable

Hardware Choices

●Freescale DEMO9S12NE64 based on MC9S12NE64 MCU

- Main Features:oAnalog-to-Digital converter (ADC)

oTimer module (TIM )

oSerial interfaces - One Serial Peripheral Interface (SPI)

Analog-to-Digital converter (ADC)

●ADC is a built in module in the MCU

- 8 channel module

- 10 Bit Resolution

●8-Bits was used (1-byte)

- To ease the calculations

- Compromise data storage

Digital-to-Analog converter (DAC)

●MAX528 from MAXIM INC.

●The MCU Communicates with DAC by SPI

●SPI is built in the MCU

Master Slave

Input and Output Channels

●Project Overview

●Data Acquisition

●Control

Control

Centralized and Localized Control

●In our project, we chose localized control.

Digital Control

●There are differences between digital control and analog control

●Analysis in z-domain rather than s-domain

●We need to consider:oSampling Time

oResolution

Microcontroller Capabilities

●8 Analog Input Channels

●8 Analog Output Channels

●8 Digital Input Channels

●8 Digital Output Channels

●8 On/Off Controllers

●8 PID Controllers

●Implemented in C-code using structures

On/Off Control

●Analog Input & Digital Output

●Simply implemented using IF-ELSE statement

●Only valid for first-order processes

●Parameters: Set Point and On-Off

PID Control

●Analog Input & Analog Output

●Implemented using mathematical expressions

●Valid for any order process

Parallelism

Controller Structures

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Graduation Project Presentation

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