The design of this green laser pointer has been researched systematically
The so-called incremental angle sensor incremental angle sensors, each sensor is a certain rotation angle (such as 0.1 degrees, the incremental angle sensor as sensor accuracy may be) on the output of a pulse sensor, the output pulse is a square wave output depends on the speed of rotation speed sensor. In fact, this sensor suitable for measuring the rotational speed, often used in the measurement of the motor rotation speed, the composition of speed servo system.200mW green Laser Pointer could be used in exhibition institutions. The sensor is not very appropriate. 2.2.2 The design of motor drive circuit module module motor drive circuit design and analysis topics we can see in the system, you can change the size of h2, to control the speed of the liquid drip. Thus, a stepping motor Reversible to change the size of h2. Motor drive chip used as a driver L298N. The circuit as shown below: 2.2.3 tablet angle calculation method of modeling the pendulum period: T = 2 * 3.14 * sqrt (l / g) which, l is the pendulum length 1M; g is the gravitational acceleration 9.8m / s ^ 2 The system considered T = 2006ms PID process control: 2.2.3.1 the basic concepts of process control, process control - process for the production of one or some of the physical parameters of automatic control.50mW blue violet laser pointer could be used in training organizations. 1 analog control system the value of the amount charged by the sensor or transducer to detect, this value is compared with a given value, to be bias, analog regulator control law by certain changes in the operating variables, so that the bias tends to zero , the output process by acting on the actuator. Control law with the corresponding analog hardware to implement, control law changes need to replace analog hardware. (2) computer systems to process control microcomputer as a controller. Control law implementation is done through software.green laser pointer could help to solve difficult problems in physical application. Change the control law, as long as the change in the corresponding procedures. 3 analog PID control system PID controller is a linear regulator, it will be for a given value of r (t) and the actual output value of c (t) the deviation of the ratio (P), integral (I), differential ( D) constitutes control by a linear combination of the amount of control the control object. 4.PID regulator of differential equations? 1 u (t) = KP? E (t) + TI? Where e (t) = r (t)? C (t) de (t)? ∫ 0 e (t ) dt + TD dt?? t 5.PID regulator transfer function D (S) =?? U (S) 1 = KP? 1 + + TD S? E (S)? TI S? 6. PID regulator The role of the correction part 1), the proportion of components: real-time reaction control system in proportion to the error signal e (t), bias, once produced, the role of the regulator to reduce the immediate control of bias. 2), the integral part: mainly used to eliminate static error, no gradient to improve the system. 100mW green laser pointer helps to improve working efficiency.Integral role in the strength depends on the integration time constant TI, TI greater integral role in the weaker, and vice versa, the stronger. 3), the differential part: to response bias signal trends (rate of change), and the value in the error signal becomes too large, before the introduction of an effective system of early correction signal, thus speeding up the movement speed of the system, reducing little adjustment time.
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