Design and construction of microprocessor based remote speed measurement, monitoring and control of d. C motor

1.2 PROBLEM STATEMENT:
The conventional Tachometers require contact between the device and the rotating body; there are many situations where the direct contact between the tachometer and the device under investigation is not possible. To deal with such situations we need a tachometer which doesn’t require direct contact with the rotating body, such tachometers are known as Contact-less Tachometer. In some cases the contact-less tachometer solely does not serve the purpose, as in the case of applications where continuous monitoring and control of the RPM is required and the test object is placed far away from the monitoring station, in such cases we need a Tachometer which can send the measured values to a remote processing unit. Considering such situations, the capability of sending RF signals is also added to this design by using RF ICs whose typical range of transmission is about 30 meters, which can be easily increased by using more sophisticated ICs. Other advantages contactless tachometer have over contact tachometer includes: No frictional losses involved, significant reduction in bulkiness, low power consumption, portability, rapid response to changes in speed, increased accuracy and increased safety for the user.
1.3 AIM AND OBJECTIVES:
The main aim of this project is to design and construct contactless tachometer with added wireless future that is capable of measuring, monitoring and control the speed in RPM of rotating object.
In order to achieve the aim of this project, the following objectives were undertaken:

1. 
   Measurement of the rotational speed of a rotating object via non-contact means.
   
2. 
   Monitor and control of speed in RPM of rotating object.
   
3. 
   Display this speed in RPM on an LCD screen.
   
4. 
   Accuracy comparation of the designed system against contact Tachometer.
   

1.4 SCOPE OF PROJECT
The scope of this project includes using a programmable 8051 microcontroller, design the circuit and build hardware for the system.
The scopes of this project are:

1. 
   The design of a low cost contact-less tachometer with added wireless feature to transmit the results at some distant (30 meters) place for further processing
   
2. 
   Monitoring and controlling of speed of the rotating object ( shaft of power turbine)
   
3. 
   The programming of 8051 microcontroller, design of transmitter/receiver circuit using IR sensor and RF ICs to detect and measure RPM of any rotating objects
   
4. 
   All readings will be displayed on Liquid Crystal Display (LCD).