What is contactless tachometer?
The Contactless Digital Tachometer circuit can be used to calculate speed of rotating wheels, discs and motor shafts. This circuit can be used at places where direct contact with motor shafts or wheels is not possible to be made, as in case of vehicles and also in industrial machines.
Which of the following is contactless type of tachometer?
2. Non-Contact Type Digital Tachometer. A tachometer that does not need any physical contact with the rotating shaft is called a non-contact digital tachometer. In this type, a laser or an optical disk is attached to the rotating shaft, and it can be read by an IR beam or laser, which is directed by the tachometer.
How do you use a non-contact tachometer?
Non-contact Digital non-contact Tachometers are also called Photo Tachometers. For non-contact measurements, a piece of reflective mark has to be placed on the spinning object – a reflective paint mark or a piece of reflective tape works – such that the rest of the spinning object has a dark or non-reflective surface.
How does a hand held tachometer work?
A non-contact tachometer sends out a beam of light. That beam reflects each time the tape or reflective mark makes a full rotation. The receiver counts these reflections over time to display the rotational speed in revolutions per minute.
What are the 3 types of tachometer?
Types of Tachometer
- Contact Tachometers. Contact tachometers require contact with a rotating object to measure its RPM.
- Non-Contact Tachometers. Non-contact tachometers can perform measurements without the need for direct contact with the object.
- Laser Tachometers.
- Optical Tachometers.
What are the advantages of tachometer?
Digital Tachometer: Benefits and Applications Generally the tachometer has a simple interface that can be integrated with an existing industrial motor or system. The device can help prevent damage to equipment as well as reduce loss of material thanks to early detection of changes in the motor’s speed.
What are different types of tachometer?
What are the components of contactless digital tachometer using PIC microcontroller?
Followings are the major components of contactless digital tachometer using pic microcontroller: LCD: Liquid crystal display is used to display speed measured by a tachometer. So if you want to make this project.
What is the function of microcontroller in tachometer?
fWORKING PRINCIPLE The main thing in tachometer is counting,which is done by microcontroller. MICRO CONTROLLER: Micro controller is a type of CPU which is used on the circuits and contains RAM input and output PARTS OF MICROCONTROLLER.
What is the difference between contactless and conventional tachometers?
• While a conventional tachometer is a contact tachometer, which can produce erroneous results due to change in contact parameters, a Contactless digital tachometer is preferred which doesn’t requires any contact with the device whose speed is to be measured.
What is the working principle of tachometer?
INTRODUCTION The basic operating principle of a mechanical tachometer is a movable magnet driven by the rotating input shaft that interacts closely with an eddy current sensor that generates the reading [1-5].