ZigBee Based Wireless DC Motor Speed & Direction Control ( my R&D project)

ZIGBEE BASED WIRELESS DC MOTOR SPEED & DIRECTION CONTROL
bharadwaj874@gmail.com
ABSTRACT : Wireless sensor networks have been very popular research field for the last couple of years. ZigBee is a new technology now being deployed for wireless sensor networks. ZigBee is a low data rate wireless network standard defined by the ZigBee Alliance and based on the IEEE 802.15.4.The ZigBee wireless network has some advantages compared with other wireless networks, it has the characteristics of low power, low price, highly secured and reliable, so implementing a remote motor control and monitoring system proves to have a good cost performance ratio.
This paper presents the implementation of a wireless sensor actor network (point to point) to control the speed of a DC motor from a remote location. Pulse Width Modulation technique provides the actual control. A feedback to measure the current speed is setup using Infra Red Sensor and fed to PIC16F877 Microcontroller directly. The conventional setup uses a frequency to voltage converter to find the speed whereas a new technique is used to calculate the speed from the IR sensor output without using frequency to voltage converter. The motor is controlled remotely with a ±5 rpm tolerance.
Keywords: Wireless Sensor Networks, ZigBee, Xbee, motor control

HOST UNIT BLOCK DIAGRAM:

NODE UNIT BLOCK DIAGRAM:
OBSERVED GRAPH:
Xbee Configuration using X-CTU Software :
ORIGINAL PICTURES:

HOST UNIT:

NODE UNIT:
CONCLUSION:
Different speeds are maintained at the given set speed by varying the duty cycle of PWM using PIC16F877A MICROCONTROLLER and a wireless sensor ZIGBEE with a resolution of ±5 rpm tolerance .The measured speed values are transferred by serial interface to the PC and are logged into a text file and are visualized with the aid of XCTU front.
The radius of the location under observation can be increased by 150 meters using an Xbee-Pro instead of ordinary Xbee. Alternatively, using a mesh network with Xbee the distance between the host and sensor node is not a crucial parameter. The acquired data can be further analyzed or used for control of the remote process.

REFERENCES
[1] H. Taub and DL Schilling. Principles of communication systems. McGraw Hill, New York, Second edition, 1986
[2] Low-Rate Wireless Personal Area Networks: Enabling Wireless Sensors with IEEE 802.15.4 by Jose A. Gutierrez ,Edgar H. Callaway, Jr, Raymond L Barrett, Jr. Published by Standards Information Network IEEE Press November 2003
[3] Wireless Communications: Principles & Practice, T.S. Rappaport. PH 1996
[4] ZigBee Wireless Networking Drew Gislason Newnes Press 2007
[5] http://www.zigbee.org/en/index.asp: Zigbee Official website
[6]http://www.maxstream.net/products/xbee/datasheet_XBee_OEM_RF-Modules.pdf: Maxtream’s Transceiver Xbee
[7]Tanenbaum, A.S., Computer Networks, 3rd ed., Prentice-Hall International 1996.

PC based Mobile Robot INSPECTOR with webcam

PROJECT DESCRIPTION

  Here we are going to construct PC-based mobile inspector with webcam. It is basically an electric powered, three-wheeled vehicle or robot attached with a PC camera or webcam. It can be used for navigation or like a inspector. Here we are going to use parallel cable and USB cable. it is used in navigations, coal mines, dark areas where people not able to take Risks.

 PROJECT OUTLINE

Ø  A brief introduction to Parallel port

Ø  An over view of ULN2803.

Ø  An overview on mechanical arrangement.

Ø  Opto couplers interfacing.

 INTERFACES USED

Ø  Parallel port interfacing.

Ø  Web cam interface.

Ø  ULN2803 interfacing

Ø  Motor interfacing.

Ø  Opt coupler interfacing

FINGERPRINT BASED SECURITY SYSTEM

PROJECT DEFINITION / SPECIFICATION

PROJECT TYPE

Micro controller(AT89C51) hardware design with software development (Device Driver). Atmel micro controller (AT89C51) based.

 PROJECT DESCRIPTION

          Personal Safes are revolutionary locking storage cases that open with just the touch of your finger. These products are designed as secure storage for medications, jewelry, weapons, documents, and other valuable or potentially harmful items. These utilize fingerprint recognition technology to allow access to only those whose fingerprints you choose. It contains all the necessary electronics to allow you to store, delete, and verify fingerprints with just the touch of a button. Stored fingerprints are retained even in the event of complete power failure or battery drain. These eliminates the need for keeping track of keys or remembering a combination password, or PIN. It can only be opened when an authorized user is present, since there are no keys or combinations to be copied or stolen, or locks that can be picked.

PROJECT OUTLINE

Ø  A brief introduction to internal architecture of microcontroller.

Ø  An over view of programming of microcontroller.

Ø  An overview on assembly language.

Ø  An overview on mechanical arrangement.

Ø  Serial port interfacing with microcontroller.

 

INTERFACES USED

Ø  Serial communication used for downloading the hex code.

Ø  Fingerprint Interfacing.

Ø  Relay circuit interface.

Ø  DC motor interfacing

Ø  LCD interfacing

SOFTWARES USED

Ø  A Cross compiler for compiling and linking the code written for AT89C51.

Ø  Serial communication software for downloading code to AT89C51.

Ø  Operating system: Windows XP.

DESTINATION TRACKER USING AT89c51 MICROCONTROLLER

PROJECT TYPE

Micro controller (AT89C51) hardware design with software development (Device Driver).

PROJECT DESCRIPTION

         

          This project is used to develop a small robot which can be used in different places where we have to transfer some load to the destinations in one big area. Here we are taking four tables which are placed at the corners of the square plane. The robot is place in the centre of the plane. At each every table a keypad is used which contains call, release and destination table numbers. According to the destinations we have given the robot will moves to that particular table.

SECTION 5: PROJECT OUTLINE

Ø  A brief introduction to internal architecture of micro controller.

Ø  An over view of programming of micro controller.

Ø  An overview on assembly language.

Ø  An overview on interfacing DC motors.

Ø  An overview of Buzzers.

Ø  An overview on interface of switches and led.

SECTION 6: INTERFACES USED

Ø  DC motor interfacing.

Ø  L293d Interfacing.

Ø   keypad interfacing

Ø  Buzzer, switches, led interfacing with micro controller.

SECTION 7: SOFTWARES USED

Ø  A Cross compiler for compiling and linking the code written for AT89C51.

Ø  Serial communication software for downloading code to AT89C51.

Ø  Operating system: Windows XP.