Automatic Door Sensor Zoning for Activation and Protection Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Automatic door sensors face challenges in distinguishing between activation and protection areas, leading to increased frequency of unnecessary door opening and closing due to false detections caused by the installation environment and structure of automatic door systems.
Innovation Solution
An automatic door sensor system with separate detection areas and algorithms, using an activation detection means for opening the door and a protection detection means with higher sensitivity for safety, allowing individual or collective output of detection results, and adjusting detection times based on the door's position and state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single automatic door sensor uses the same detection means for both protection area and activation area, then the device complexity is reduced, but false detections increase due to environmental effects leading to unnecessary door operations
Solution Approach 1:
The detection area is divided into a protection area closer to the door and an activation area farther from the door. Different detection means are assigned to each area: protection detection means with higher sensitivity for the protection area, and activation detection means with lower sensitivity for the activation area. This segmentation resolves the contradiction by allowing each area to have optimized detection characteristics.
Solution Approach 2:
Different detection means with different sensitivity characteristics are applied to different spatial locations. The protection detection means uses higher sensitivity appropriate for the protection area, while the activation detection means uses lower sensitivity appropriate for the activation area. This local differentiation eliminates false detections while maintaining reliable protection.
2Reliability
If the detection sensitivity is increased to improve safety in the protection area, then the reliability improves, but the frequency of unnecessary door opening and closing operations increases due to false detections
Solution Approach 1:
The detection system is segmented into protection detection means and activation detection means operating in different areas. The protection detection means uses high sensitivity for safety while the activation detection means uses lower sensitivity to avoid false detections, thus maintaining both safety and operational efficiency.
Solution Approach 2:
The protection detection means acts as an intermediary layer between the door and the activation detection means. It provides an additional detection barrier that filters out false detections before they reach the activation area, ensuring that only genuine safety concerns trigger door operations.
3Productivity
If the detection sensitivity is decreased to reduce false detections in the activation area, then the productivity improves by reducing unnecessary door operations, but the safety protection capability is reduced
Solution Approach 1:
The detection system is divided into two independent detection means: protection detection means with high sensitivity for safety monitoring in the protection area, and activation detection means with lower sensitivity for activation control in the activation area. Each detection means operates independently with optimized sensitivity for its specific function.
Data Source
AI summary
A special detection area in which detection in accordance with an activation detection algorithm for detecting a person or an object and detection in accordance with a protection detection algorithm having a higher detection sensitivity for the person or the object than the activation detection algorithm are performed is provided. Results of the detections in accordance with the activation detection algorithm and the protection detection algorithm are individually output to an automatic door device.