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DESIGN OF A HIGH PERFORMANCE NONCONTACT DIGITAL TACHOMETER BY USING 8051 MICROCONTROLLER Under the guidance of
Project members: CH. SUNIL KUMAR.
Sri P.R MURALI MOHAN, M.TECH ASSOCIATE PROFESSOR
K. SREEKANTH. G. KONDALARAO. U. MAHESH KUMAR.
ABSTRACT Aim of the design is to develop a system based on Embedded micro controller(8051) which is used as a digital contact less tachometer for measuring the speed (in rpm) of the AC (or) DC motor by using Infrared Frequency without the help of a expensive tachometer available in the market.
INTRODUCTION
Tachometer is used for measuring rotational speed It Can be used to measure speed of a rotating shaft It Can also be used to measure flow of liquid by attaching a wheel with inclined vanes
DESIGN OF A NON-CONTACT DIGITAL TACHOMETER SHAFT CIRCULAR ARRANGEMENT
IR RAYS
MOTOR
IR TRANSMITTER
IR RECIEVER(TSOP)
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
BLOCK DIAGRAM: DISPLAY UNIT POWER SUPPLY TSOP
555 TIMER
MICRO CONTROLER IR TRANSMITTER
BLOCK DIAGRAM DESCRIPTION
The power was passed to the micro controller through the help of power supply unit
The data passed to the IR transmitter through the help of 555 timer IR transmitter send the data through wireless, TSOP will receive the data and move towards to the micro controller unit The micro controller unit will send the data into display unit, display unit will display the message of received data from micro controller
IR SENSORS
IR TRANSMITTER
IR RECEIVER(TSOP)
IR SENSORS DESCRIPTION •
The infrared LED emitter produces a light beam 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 CIRCUIT
OPERATION OF POWER SUPPLY CIRCUIT
The 230v AC supply voltage can be reduced to 12v AC by using step down transformer. The 12v AC is converted into 12v DC by using Bridge rectifier. The DC voltage is filtered by using capacitors at different levels. The voltage regulators are used to get constant output voltage.
LCD 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
SCHEMATIC DIAGRAM
8051 MICRO CONTROLLER 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 1 to 8 9 10 11 12 13 14 15 16 17 18 & 19 20 21 to 28 29 30 31 32 to 39 40
Description Port 1 Reset RXD (receiver) TXD (transmitter) INT0(interrupt 0) INT1( interrupt 1) T0 (timer0) T1 (timer1) WR (write) RD (read) crystal oscillator GND (ground) port 2 PSEN (program store enable) ALE (address latch enable) EA (effective address) Port 0 +Vcc (Supply)
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).
CONCLUSION
Queries ?
Project members: CH. SUNIL KUMAR. K. SREEKANTH. G. KONDALARAO. U. MAHESH KUMAR.
Project members: CH. SUNIL KUMAR.
Sri P.R MURALI MOHAN, M.TECH ASSOCIATE PROFESSOR
K. SREEKANTH. G. KONDALARAO. U. MAHESH KUMAR.
ABSTRACT Aim of the design is to develop a system based on Embedded micro controller(8051) which is used as a digital contact less tachometer for measuring the speed (in rpm) of the AC (or) DC motor by using Infrared Frequency without the help of a expensive tachometer available in the market.
INTRODUCTION
Tachometer is used for measuring rotational speed It Can be used to measure speed of a rotating shaft It Can also be used to measure flow of liquid by attaching a wheel with inclined vanes
DESIGN OF A NON-CONTACT DIGITAL TACHOMETER SHAFT CIRCULAR ARRANGEMENT
IR RAYS
MOTOR
IR TRANSMITTER
IR RECIEVER(TSOP)
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
BLOCK DIAGRAM: DISPLAY UNIT POWER SUPPLY TSOP
555 TIMER
MICRO CONTROLER IR TRANSMITTER
BLOCK DIAGRAM DESCRIPTION
The power was passed to the micro controller through the help of power supply unit
The data passed to the IR transmitter through the help of 555 timer IR transmitter send the data through wireless, TSOP will receive the data and move towards to the micro controller unit The micro controller unit will send the data into display unit, display unit will display the message of received data from micro controller
IR SENSORS
IR TRANSMITTER
IR RECEIVER(TSOP)
IR SENSORS DESCRIPTION •
The infrared LED emitter produces a light beam 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 CIRCUIT
OPERATION OF POWER SUPPLY CIRCUIT
The 230v AC supply voltage can be reduced to 12v AC by using step down transformer. The 12v AC is converted into 12v DC by using Bridge rectifier. The DC voltage is filtered by using capacitors at different levels. The voltage regulators are used to get constant output voltage.
LCD 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
SCHEMATIC DIAGRAM
8051 MICRO CONTROLLER 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 1 to 8 9 10 11 12 13 14 15 16 17 18 & 19 20 21 to 28 29 30 31 32 to 39 40
Description Port 1 Reset RXD (receiver) TXD (transmitter) INT0(interrupt 0) INT1( interrupt 1) T0 (timer0) T1 (timer1) WR (write) RD (read) crystal oscillator GND (ground) port 2 PSEN (program store enable) ALE (address latch enable) EA (effective address) Port 0 +Vcc (Supply)
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).
CONCLUSION
Queries ?
Project members: CH. SUNIL KUMAR. K. SREEKANTH. G. KONDALARAO. U. MAHESH KUMAR.
