The performance of all kinds of different digital sensors , should be based on different applications

The performance of all kinds of different digital sensors , should be based on different applications , use of different digital speed sensors. Several major applications are presented . 1 , analog DC motor speed control DC motor speed control analog feedback with analog voltage and frequency in two ways. The former DC tachometer generator as a Engine Coolant Sensor , because the DC tachometer generator inherent defect, so that people consider using other types of speed sensor as a speed feedback . Wherein the speed feedback element is a magnetic sensor via digital speed F / V conversion , and filtered into a DC level back to the comparing circuit for controlling the rotational speed . The speed control method is not only simple , reliable, and low cost.
2, the DC motor incremental motion control with high precision for complex control applications requires the use of incremental motion control methods to meet system requirements. Incremental motion control only controls the speed of movement , but also for positioning control and frequent starts and stops acceleration and deceleration control . The speed feedback system with digital Coolant Temperature Sensor output digital signal that can achieve these various control requirements. Incremental movement of the DC motor speed control system in the encoder sensor digital Camshaft Position Sensor. Speed ​​digital speed sensor output signal is fed to the comparison circuit and a regulating circuit , to meet the fast high-precision servo control, and requirements for wide speed control , which is often used in modern incremental movement speed feedback method . 3, the phase lock servo motor speed control system is controlled by the speed feedback to regulate due to mechanical loads or changes in the environment caused by such speed deviation . This method of control is to regulate the nature of the case of a difference , speed accuracy is not high, although the number may be used to improve the accuracy of incremental control , but still can not meet the high precision speed control requirements. The lock-in technique for speed control , can achieve synchronous motor control is achieved without droop . Lock-in technique to compose for servo controlling the phase lock servo control system, which phase lock loop is determined by the reference frequency generator , an encoder , a phase frequency comparator , a low pass filter, amplifier and DC motors and other components.