Human Detection Control Using Dual Sensors and Auto Mode Switching
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Solution Overview
Problem
Conventional human body detection systems require a sensor to detect ambient brightness for switching between detection modes, necessitating user input for switching between sensor cameras and sensor apparatuses based on environmental conditions.
Innovation Solution
A control system and sensor unit that include a first human detector for dark environments, a second human detector with an image capturer, and a determiner with multiple modes, allowing automatic switching between detection modes based on the presence or absence of a human, without the need for an additional sensor to detect the surrounding environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a sensor that detects ambient brightness is provided to enable automatic switching between detection modes, then the automation of detection mode selection is improved, but the device complexity increases due to additional sensors
Solution Approach 1:
The system uses the image capturer's existing imaging function to detect ambient brightness levels, allowing the system to automatically determine appropriate detection modes without requiring separate brightness detection sensors. The image capturer serves dual purposes: capturing images for human detection and providing brightness information for mode selection.
2Device complexity
If manual input is required for switching between sensor camera and sensor apparatus, then the device complexity is reduced, but the ease of operation deteriorates due to user intervention
Solution Approach 1:
The control unit automatically selects and switches between detection modes by analyzing brightness information from the image capturer and determining the most appropriate detection mode, eliminating the need for manual user input while maintaining simple device architecture.
3Adaptability or versatility
If detection mode switching is based on ambient brightness, then the adaptability to environmental conditions is improved, but the device complexity increases due to additional sensing requirements
Solution Approach 1:
The image capturer is utilized for multiple functions: capturing images for human body detection, determining ambient brightness levels, and providing input for automatic detection mode selection. This multi-functional use enables environmental adaptation without adding dedicated brightness sensors.
Data Source
AI summary
A control system includes: a first human detector that detects the presence or absence of a human within a first detection range; a second human detector that has a second detection range that overlaps with the first detection range, and detects the presence or absence of a human within the second detection range; a determiner that has a plurality of determination modes for determining the presence or absence of a human; a transmitter that transmits a control signal to a control target based on a result of determination made by the determiner; and a load that receives the control signal and serves as the control target whose operation mode is switched according to the control signal. The determiner performs operation in a first determination mode for determining the presence or absence of a human based on at least a result of detection performed by the first human detector when the load is in a first operation mode, and performs operation in a second determination mode for determining the presence or absence of a human based on a result of detection performed by the second human detector when the load is in a second operation mode that is different from the first operation mode.