Infrared Security Sensor Adaptive Power Control

The patent implements a dynamic adjustment mechanism where the light projecting power is automatically adjusted in multiple steps based on detected light levels. The system transitions from static fixed power to dynamic adaptive power control, allowing the light projecting unit to automatically increase or decrease power in discrete steps to maintain optimal reception levels under varying environmental conditions such as different axis-to-axis distances and lighting conditions.

The patent employs a feedback control mechanism where the light receiving unit continuously monitors the received light level and sends feedback signals to the light projecting power control unit. Based on this feedback, the system automatically adjusts the light projecting power to maintain the received light level within an optimal range, thereby adapting to environmental changes without manual intervention.

The system dynamically adjusts the light projecting power based on actual environmental conditions rather than operating at maximum power continuously. The light projecting power control unit modifies the power output in multiple steps according to the detected light levels, ensuring the minimum necessary power is used to maintain reliable detection signal levels, thereby reducing overall electricity consumption while preserving reliability.

The patent changes the operating parameters of the light projecting unit by adjusting the light projecting power in discrete steps. Instead of maintaining a fixed high power level, the system varies the power parameter adaptively based on environmental conditions, achieving the same detection reliability with lower average power consumption and reduced thermal stress on components, thus improving durability.

The patent prepares the system for optical axis adjustment by pre-configuring multiple discrete power steps and establishing a manual adjustment mode. Before actual adjustment begins, the system is set up with predetermined power levels that will be used during the adjustment process, allowing the operator to systematically work through each step and clearly observe level changes without dealing with continuous variable adjustments.

The patent segments the light projecting power into discrete steps rather than allowing continuous adjustment. This segmentation creates distinct, manageable adjustment levels that are easier to control and observe during optical axis alignment. Each power step represents a discrete increment or decrement, making it simpler for operators to make precise adjustments and clearly confirm level changes at each stage.