Reflective Sheet Detector with Segmented Channels

The detector is divided into multiple independent detection channels (first detection channel and second detection channel) with separate emitter-receiver pairs. Each channel detects signals independently, and the system determines sheet presence when both channels detect simultaneously. This segmentation allows the system to maintain high reliability even when individual channels encounter scattered reflections from smooth or distorted sheets.

A reflecting member is introduced as an intermediary element to redirect signals from the emitter to the receiver through a controlled path. The reflecting member ensures that signals pass through the sheet at a specific angle and position, improving detection accuracy by preventing direct reflection issues while maintaining relatively simple device structure.

The detection system is segmented into multiple independent channels, each with its own emitter, receiver, and signal path through the guide plates. By requiring simultaneous detection in both channels to confirm sheet presence, the system achieves precise measurement while maintaining high reliability against false detections from scattered signals.

Instead of trying to prevent scattered signals directly, the invention inverts the approach by using multiple independent detection channels and requiring consensus detection. The system inverts the problem-solving strategy from blocking harmful reflections to using redundant detection paths that can distinguish true signals from scattered ones through logical combination.