Which sensor can be used for speed measuring of DC motor?

The conventional method of measuring RPM is using a device called tachometer, which can precisely measure the speed of up to thousands of RPM. This paper presents a way to measure the speed of DC Motor using Arduino UNO. The output voltage of a proximity sensor is taken as analog input by the Arduino.

Which instrument can be used to measure the speed of a motor?

tachometer
A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are increasingly common.

How do you monitor motor speed?

Motor Speed Measurement

1. A strobe light (stroboscope) may be used to measure RPM. Some strobe lights have active counters showing the flash rate.
2. Optical tachometers may be used to determine spin rate, however they require something like a propeller attached to the motor which may slow it down.

How does Arduino measure dc motor speed?

Arduino can generate PWM on its analog output pin and when it is applied to DC motor, its speed varies. So it is very simple and easy task. To measure RPM, opto-interrupt sensor MOC7811 is used. When motor completes 1 revolution, the sensor generates 1 pulse and such pulses are calculated by arduino to calculate RPM.

How do you control the speed of a 12V DC motor with an Arduino?

IN1 pin of the L298 IC is connected to pin 8 of the Arduino while IN2 is connected to pin 9. These two digital pins of Arduino control the direction of the motor. The EN A pin of IC is connected to the PWM pin 2 of Arduino. This will control the speed of the motor.

How do you calculate the speed of a DC generator?

Number of revolutions per second (speed in RPS) = N/60. Therefore, time for one revolution = dt = 60/N (Seconds) From eq. 1, emf generated per conductor = dΦ/dt = PΦN/60 (Volts) …..

How do you calculate synchronous speed?

The synchronous speed of an AC motor is determined by the frequency of the source and the number of poles. The RPM is calculated by multiplying the frequency times 60 and dividing by the number of pairs of poles.

Which tool is used in measuring speed?

Odometers and speedometers are two of the many instruments used to measure speed.

How can you measure speed?

The equation for speed is simple: distance divided by time. You take the distance traveled (for example 3 meters), and divide it by the time (three seconds) to get the speed (one meter per second).

How do you measure the back EMF of a DC motor?

If you know your motor, then you know its internal resistance. You can measure the voltage and current apllied to the motor, and subtract the I*R from the voltage applied, and voila you get your back EMF.

How back EMF controls the speed of a DC motor?

Back EMF always acts to reduce the changing magnetic field through the coils. It does so by generating a voltage which opposes the supply voltage, thus reducing the current. In ideal DC motor where R=0 and L=0, and RPM is constant with no load, back EMF will be exactly the same as the supply voltage.