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PROJECT DESCRIPTION

The main objective of this project is to avoid physical contact between the motor shaft and tachometer by using a non-contact tachometer in order to make it convinient, while measuring the speed of a BLDC motor.Also using standard contact type tachometer may not feasible in some applications.

The proposed system uses a microcontroller of the 8051 family and a rectified-power supply. An IR transmitter and a photodiode is connected to the microcontroller for measuring the speed of the BLDC motor. A LCD display is interfaced to the microcontroller for displaying the speed information.

This project uses IR light reflection principles. A white patch is mounted on the shaft of the motor. A pair of sensors (Transmitter and receiver) are used to develop a pulse for each reflection that sends an interrupt to the microcontroller. The timer of the controller calculates each pulse received in a particular time interval and displays the same as RPM (speed) on the LCD display.

The concept of the contact-less tachometer can be enhanced and implemented in the bikes, cars for speed measurement. And thus, the usage of the traditional analog speedometer could be avoided in future.

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The main objective of this project is to avoid physical contact between the motor shaft and tachometer by using a non-contact tachometer in order to make it convinient, while measuring the speed of a BLDC motor.Also using standard contact type tachometer may not feasible in some applications.

The proposed system uses a microcontroller of the 8051 family and a rectified-power supply. An IR transmitter and a photodiode is connected to the microcontroller for measuring the speed of the BLDC motor. A LCD display is interfaced to the microcontroller for displaying the speed information.

This project uses IR light reflection principles. A white patch is mounted on the shaft of the motor. A pair of sensors (Transmitter and receiver) are used to develop a pulse for each reflection that sends an interrupt to the microcontroller. The timer of the controller calculates each pulse received in a particular time interval and displays the same as RPM (speed) on the LCD display.

The concept of the contact-less tachometer can be enhanced and implemented in the bikes, cars for speed measurement. And thus, the usage of the traditional analog speedometer could be avoided in future.

PROJECT HIGHLIGHTS
IR Reflection based Non-Contact Speedometer.
Call/mail for Tech Support from 10 am - 7 pm IST.
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
×
IR Reflection based Non-Contact Speedometer.
Call/mail for Tech Support from 10 am - 7 pm IST.
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
BLOCK DIAGRAM
Hardware Requirements
  • 8051 series Microcontroller
  • LCD
  • IR and Photo Diodes
  • Transformer
  • Diodes
  • Resistors
  • Capacitors
  • Voltage Regulator
  • LED
  • BLDC Fan
×
  • 8051 series Microcontroller
  • LCD
  • IR and Photo Diodes
  • Transformer
  • Diodes
  • Resistors
  • Capacitors
  • Voltage Regulator
  • LED
  • BLDC Fan
Software Requirements
  • Keil compiler
  • Language: Embedded C or Assembly
×
  • Keil compiler
  • Language: Embedded C or Assembly
Q & A
Q:  Can I use a large Induction motor or any other motor to sense the speed?
A:  Yes, any motor with a spot reflecting surface on the shaft can be used.
Q:  How can we sense the RPM reading?
A:  The RPM reading can be sensed by using IR sensors interfaced to the microcontroller.
Q:  Which microcontroller is used in this project?
A:  8051 family 40 pin microcontroller is used in this project.
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