NON CONTACT TECHOMETER

The aim of the project is to design a contactless speed sensing device (tachometer) for a Brushless DC (BLDC) motor. Traditional tachometers require a physical contact to the shaft of the motor to measure the speed. In certain applications, where it is not feasible to measure the speed for safety and technical reasons, it is possible for a contactless tachometer to take the readings from a certain distance.

This proposed system uses the IR transmitting and receiving technique. This is achieved by receiving IR rays from a reflecting spot on the shaft of the motor. Such arrangements can measure the rate at which the IR rays are getting reflected back. The project uses a microcontroller of 8051 family. A pair of sensors (Transmitter and receiver) is used to develop a pulse for each reflection that sends an interrupt to the microcontroller. The timer of the controller calculates the speed by each pulse received in a particular time interval and displays the same. The microcontroller is interfaced with an LCD to display the speed.

The concept of the contact-less tachometer can be enhanced and implemented in the bikes, cars for speed measurement, avoiding the use of traditional analog speedometer.

GSM BASED ENERGY METER READING WITH LOAD CONTROL

GSM BASED ENERGY METER READING WITH LOAD CONTROL

ABSTRACT

The main objective of the project is to develop a GSM based energy meter reading system and load control through SMS. Electricity department sends employees to take meter reading every month, which is an expensive and time consuming job. The proposed project provides a convenient and efficient method to avoid this problem. The electricity department and the user can get the readings of the energy meter of consumers via SMS. The loads can also be controlled by the user of this system via SMS using this project.

A microcontroller input is effectively interfaced to a digital energy meter that takes the reading from the energy meter and displays the same on an LCD. The reading of the energy meter is also sent to the control room by an SMS via SIM loaded GSM modem. This GSM modem can also receive commands from the cell phone to control the owner’s electrical loads. It uses a standard digital energy meter that delivers output pulses to the microcontroller to perform counting for necessary action. On receiving command it can switch ON/OFF the loads.

Further this project can be interfaced with a non volatile memory IC like EEPROM along with a keypad so that the user the change the mobile number as per the requirement.

for more info call 7736664707

kerala ,kozhikode