Human Motion Detection Signal Control for Lighting Networks
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Solution Overview
Problem
Existing systems face issues with detection signal congestion when multiple sensors are used, leading to unreliable transmission to target devices due to communication overload.
Innovation Solution
A detection device that includes a human detector, communicator, and controller, which delays or prunes detection signals based on the magnitude of movement and ambient brightness to manage signal transmission effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sensors are provided in an indoor space to detect person movement, then the detection coverage and reliability are improved, but the number of detection signals transmitted increases causing communication congestion
Solution Approach 1:
The controller changes the transmission parameter (timing and frequency) of detection signals based on the magnitude of movement detected. When movement magnitude is small, the controller delays or prunes signal transmission, thereby reducing communication congestion while maintaining reliable detection for significant movements
2Speed
If detection signals are transmitted every time movement is detected to ensure timely response, then the responsiveness is improved, but communication congestion increases causing signal loss
Solution Approach 1:
The system dynamically adjusts the signal transmission strategy based on real-time detection of movement magnitude. The controller flexibly decides whether to transmit, delay, or prune signals based on the current detection context, optimizing both responsiveness and reliability under varying communication conditions
Data Source
AI summary
The detection device includes: a human detector that detects movement of a person; a communicator that transmits a detection signal indicating that the human detector has detected the movement of the person; and a controller that delays or prunes transmission of the detection signal by the communicator when the controller determines that a magnitude of the movement of the person detected by the human detector is less than a predetermined magnitude.