Speed ​​detection adopts photoelectric pulse generator

In the traditional analog speed control system, a speed-measuring generator is generally used for speed detection, but the detection conversion process is susceptible to environmental factors, resulting in a reduction in speed-measuring accuracy and performance. In order to meet the requirements of the system, a photoelectric pulse generator is used for speed detection, which is converted into a speed feedback signal of DC voltage by the converter. Because the photoelectric pulse generator is a non-contact measurement, it has the characteristics of small self-inertia, high resolution and measurement is almost not affected by environmental factors, so the speed measurement accuracy is high, the performance is excellent, the reliability is high, and it has a strong anti-interference ability. The system's high steady speed accuracy provides a guarantee. At the same time, considering the channel connected with the microcomputer system on the given circuit, the speed can be directly given by the microcomputer to achieve automatic control of the experimental process.

The trigger is an important control unit in the converter. Generally, the requirements of the converter on the trigger are common, that is, the reliability of the pulse, the uniformity of the pulse, and the consistency of the phase shift. The old-fashioned discrete component trigger circuit can no longer meet the requirements well. In recent years, with the development of microelectronics technology, various trigger circuits have also emerged. Due to the advanced integrated manufacturing process, integrated circuit triggers can be designed relatively well and the device parameters produced have good consistency, and discrete component triggers In comparison, the volume is significantly reduced, the failure rate is reduced, the reliability is improved, the parameters are consistent, and the pulses are uniform. Compared with digital triggers, the rapidity and anti-interference are significantly improved. At the same time, the integrated trigger has the advantages of good phase shift performance, proportional control angle and control voltage, wide phase shift range, small temperature drift, large output power, etc. In addition, there are few peripheral components of the trigger unit made by the integrated trigger, so debugging is convenient and convenient. Small, low cost and easy maintenance.