How to measure the speed of a DC geared motor

　　DC gear motors are currently widely used.When using the device, what is its speed measurement value?Follow the editor to learn about it.

　　Hall effect principle tachometer: The rotating shaft of the DC geared motor drives the magnetic steel on the shaft to rotate, thereby changing the size of the magnetic field. The change of the magnetic field is converted into a pulse signal through the Hall circuit, and the rectangular pulse signal is output after amplification.When the speed changes, the frequency of the output pulse will also change.So as to obtain the speed of the geared motor.
　　Photoelectric speedometer: adopt grid plate and photoelectric gate to form a speedometer system.When the DC geared motor drives the grid plate to rotate through the transmission part, the speed measuring photoelectric gate obtains a series of pulse signals.These pulse signals are matched by two timing/counters, one for counting and one for timing.Calculate the number of pulses per unit time m, and calculate the speed of the DC motor after unit conversion.The formula for calculating the speed of the DC geared motor: r=1000n/(T*N1*N)(rps).
　　Is the speed of the DC motor, n is the number of grids, N1 is the number of interrupts of T1, and t is the overflow time of timer T1.
　　Through the above introduction to the speed measurement of DC geared motors, I believe that everyone has already understood this knowledge, and I hope this answer can help you choose a suitable product.