Galvanometer Laser Protection Using Dynamic Multi-Sensor Overload Control

The patent replaces simple analog circuit protection with a microprocessor-based digital control system. The microprocessor continuously monitors motor current, temperature, and position through ADC converters, enabling precise measurement and intelligent decision-making. This substitution of mechanical/analog systems with digital electronics resolves the contradiction by providing both low complexity (integrated microprocessor) and high precision (multiple sensing channels with ADC conversion).

The patent implements comprehensive feedback mechanisms where the microprocessor continuously reads sensor data (current via shunt resistor, temperature via thermistor, position via encoder) and adjusts control signals accordingly. This closed-loop feedback system enables real-time precision monitoring and adaptive protection, resolving the contradiction between simple structure and precise control by using feedback to achieve accuracy without complex hardware.

The patent implements dynamic protection thresholds that automatically adjust based on real-time operating conditions. The microprocessor monitors motor temperature and load conditions, then adaptively sets current thresholds. For example, when temperature is normal, higher current thresholds are permitted; when temperature rises, thresholds are reduced. This dynamic adaptation resolves the contradiction by maintaining ease of operation (automatic adjustment) while achieving versatility (response to varying conditions).

The patent changes protection parameters dynamically based on operating state. The microprocessor modifies current threshold values, sampling frequencies, and protection response times according to temperature, load, and position parameters. This parameter adaptation enables the system to handle different operating conditions effectively while maintaining simple operation through automatic parameter tuning.

The patent segments the monitoring system into multiple independent channels: current monitoring (via shunt resistor and ADC), temperature monitoring (via thermistor and ADC), and position monitoring (via encoder). Each channel independently monitors its parameter and feeds data to the microprocessor. This segmentation resolves the contradiction by providing comprehensive reliable protection through multiple sensors while maintaining relatively simple overall structure through modular design.

The microprocessor serves multiple functions: it controls motor drive, monitors current, reads temperature sensors, processes position data, and executes protection logic. This multi-functional integration achieves reliable comprehensive protection without proportionally increasing device complexity, as a single microprocessor unit handles all monitoring and control tasks.

The patent implements preliminary warning actions before full protection trigger. When parameters approach threshold values, the system issues warnings and reduces output gradually, allowing operators to take corrective action before protection trips occur. This preliminary action resolves the contradiction by maintaining high reliability (early detection) while preserving productivity (gradual response rather than immediate shutdown).

The microprocessor performs periodic sampling of all parameters at configured intervals, allowing it to distinguish between transient fluctuations and genuine faults. By sampling periodically and analyzing trends rather than reacting to single instantaneous values, the system achieves responsive protection without false trips from momentary anomalies, resolving the contradiction between reliability and productivity.