Motor control circuit for laser swinger

Abstract

The invention provides a motor control circuit for a laser swinger. The motor control circuit is connected to the two ends of a motor and comprises a motor speed regulation module and a motor speed stabilization module. The motor speed stabilization module comprises a single-chip microcomputer and a motor speed stabilization chip. The single-chip microcomputer controls the work state of the motor speed stabilization chip. The motor speed stabilization chip is connected to the two ends of the motor. The motor speed regulation module comprises a resistance value adjustable device. The resistance value adjustable device is connected with the motor speed stabilization chip so as to serve as a load of the motor speed stabilization chip. The rotating speed of the motor can be adjusted by changing the resistance value of the resistance value adjustable device. By the adoption of the technical scheme, adjustment time and stabilization time of the rotating speed of the motor are shorter, occupation of resources of the single-chip microcomputer is greatly reduced, and the use efficiency of the single-chip microcomputer is improved.

Description

technical field [0001] The invention relates to the field of photoelectric equipment control circuits, in particular to a motor control circuit for laser leveling instruments. Background technique [0002] The laser leveling instrument is a device that uses a visible semiconductor laser beam to form a laser surface by horizontal rotation as a horizontal reference plane for large-scale construction. According to the different construction sites, the laser leveling instrument needs to have multi-gear rotation speed regulation, and the speed needs to be stable. The speed regulation technology commonly used in the industry now mainly realizes speed regulation and steady speed through PWM pulse width modulation and software PID parameter adjustment. The process of speed regulation and speed stabilization by the above method has the following defects: [0003] 1. When the motor is controlled at a low speed, the feedback time period of the speed detection becomes longer, resultin...

AI Technical Summary

Problems solved by technology

[0004] 2. During PWM modulation, the ripple generated on the power supply is relatively large, which affects the sampling accuracy of the high-precision horizontal electronic sensor;

[0005] 3. When PWM is modulated, if the duty ratio is small, its load capacity is poor. When the load is too large, it is difficult to adjust the speed, and the time delay of the adjustment is too large;

[0006] 4. PID operation and PWM speed regulation occupy the resources of MCU software and hardware, and have high requirements for the system of single-chip microcomputer

Images