DESIGN OF A HIGH PERFORMANCE NON-DESIGN OF A HIGH PERFORMANCE NON-CONTACT CONTACT

DIGITAL TACHOMETER BY USING 8051 DIGITAL TACHOMETER BY USING 8051 MICROCONTROLLERMICROCONTROLLER

Project membersProject members::

CH. SUNIL KUMAR.

K. SREEKANTH.

G. KONDALARAO.

U. MAHESH KUMAR.

Under the guidance of

Sri P.R MURALI MOHAN, M.TECH ASSOCIATE PROFESSOR

ABSTRACTABSTRACT

Aim of the design is to develop a system based on Aim of the design is to develop a system based on Embedded micro controller(8051) which is used as a digital Embedded micro controller(8051) which is used as a digital contact less tachometer for measuring the speed (in rpm) of contact less tachometer for measuring the speed (in rpm) of the AC (or) DC motor by using Infrared Frequency without the the AC (or) DC motor by using Infrared Frequency without the help of a expensive tachometer available in the market. help of a expensive tachometer available in the market.

INTRODUCTIONINTRODUCTION

Tachometer is used for measuring rotational Tachometer is used for measuring rotational speedspeed

It Can be used to measure speed of a rotating It Can be used to measure speed of a rotating shaftshaft

It Can also be used to measure flow of liquid by It Can also be used to measure flow of liquid by attaching a wheel with inclined vanesattaching a wheel with inclined vanes

MOTOR

IR TRANSMITTER IR RECIEVER(TSOP)

CIRCULAR ARRANGEMENTSHAFT

IR RAYS

DESIGN OF A NON-CONTACT DIGITAL TACHOMETER

OPERATION OF A NON-CONTACT DIGITAL TACHOMETER• Place the tx and rx in such a way that the IR transmitter continuously generates the infrared rays and the receiver receives it.

• To the motor shaft arrange one circular arrangement having a small hole and position it exactly at the middle of tx and rx arrangement in such a way that when the shaft rotates, only at one point the IR rays falls on the rx.

• As usual the IR receiver receives the IR signals from the transmitter when the motor was running for every one complete rotation.

• The IR receiver (TSOP) sends these data to the micro controller, the controller compares the data and calculates the speed of motor. Speed (in rpm) was displayed on the display unit (LCD).

BLOCK DIAGRAM:BLOCK DIAGRAM:

MICRO CONTROLER

POWER

SUPPLY

DISPLAY UNIT

TSOP

555 TIMER

IRTRANSMITTER

BLOCK DIAGRAM DESCRIPTIONBLOCK DIAGRAM DESCRIPTION

The power was passed to the micro controller through the The power was passed to the micro controller through the help of power supply unit help of power supply unit

The data passed to the IR transmitter through the The data passed to the IR transmitter through the help of 555 timer help of 555 timer

IR transmitter send the data through wireless, IR transmitter send the data through wireless, TSOP will receive the data and move TSOP will receive the data and move towards to the micro towards to the micro

controller unit controller unit The micro controller unit will send the data into The micro controller unit will send the data into

display unit, display unit will display the message display unit, display unit will display the message

of received data from micro controllerof received data from micro controller

IR SENSORSIR SENSORS

IR TRANSMITTER IR

RECEIVER(TSOP)

IR SENSORS DESCRIPTIONIR SENSORS DESCRIPTION

• The infrared LED emitter produces a light beam The infrared LED emitter produces a light beam across the bottom of the coil.across the bottom of the coil.

• There's less noise and ambient light than at normal optical wavelengths hence IR (Infrared) is used. • TSOP (Tiny Small Online Package) is used to receive the signals from IR transmitter.

POWER SUPPLY CIRCUITPOWER SUPPLY CIRCUIT

OPERATION OF POWER SUPPLY OPERATION OF POWER SUPPLY

CIRCUITCIRCUIT The 230v AC supply voltage can be reduced to The 230v AC supply voltage can be reduced to

12v AC by using step down transformer.12v AC by using step down transformer. The 12v AC is converted into 12v DC by using The 12v AC is converted into 12v DC by using

Bridge rectifier.Bridge rectifier. The DC voltage is filtered by using capacitors The DC voltage is filtered by using capacitors

at different levels.at different levels. The voltage regulators are used to get The voltage regulators are used to get

constant output voltage.constant output voltage.

LCD DISPLAYLCD DISPLAY

• It is a general purpose alphanumeric LCD display, with two lines of 16 characters

• It is thinner and lighter and draw much less power than cathode ray tubes.

• It is made up of any number of color or monochrome pixels arrayed in front of a light source or reflector.

SCHEMATIC DIAGRAMSCHEMATIC DIAGRAM

8051 MICRO CONTROLLER8051 MICRO CONTROLLER

Features:Features:

• it consists of 4 ports and each port having 8 pins• 8051 had on-chip memory having 128 bytes of memory.• ROM having memory of 4 kilo bytes.• It consists of 2 timers.• It consists of one serial port.• It consists of 6 interrupts in that 3 are internal (software) and 3 are external (hard ware).• it consists of 16 address lines and data lines.

Pin Description:

Pin number Description

1 to 8 Port 1 9 Reset 10 RXD (receiver) 11 TXD (transmitter) 12 INT0(interrupt 0) 13 INT1( interrupt 1) 14 T0 (timer0) 15 T1 (timer1) 16 WR (write) 17 RD (read) 18 & 19 crystal oscillator 20 GND (ground) 21 to 28 port 2 29 PSEN (program store enable) 30 ALE (address latch enable) 31 EA (effective address) 32 to 39 Port 0 40 +Vcc (Supply)

Registers:Registers:

• 8051 microcontroller consists of 8 "R" (R0, R1, R2, R3, R4, R5, R6, and R7) which are used to assist in manipulating values And moving data from one memory location to another.

• It consists special function registers like stack pointer, data pointer, PCON (power control), TCON (timer control), TMOD (timer mode), SBUF (serial control), IE (interrupt enable), IP (interrupt priority) ,PSW (program status word), SCON (serial control).

CONCLUSIONCONCLUSION

Queries ?

Project Project members:members:

CH. SUNIL KUMAR.

K. SREEKANTH.

G. KONDALARAO.

U. MAHESH KUMAR.