Information Terminal Power Control via Human Detection and Position Change
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Solution Overview
Problem
Existing information systems that use human detection sensors for power saving methods turn off the sensor uniformly, leading to missed human detection when a person is nearby, necessitating a more efficient power consumption suppression mechanism.
Innovation Solution
An information terminal equipped with a camera, a human detection unit, and a position change detection unit, with a control unit that performs power control based on the results of human detection and position changes to optimize camera usage and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the human detection sensor is always kept in on-state, then human detection reliability is improved, but power consumption increases
Solution Approach 1:
The sensor operates in dynamic states (on/off) based on detected conditions rather than remaining constantly on, adapting its operational state to actual needs while maintaining detection reliability
Solution Approach 2:
The sensor is activated periodically or conditionally based on detected events (such as sound or motion), rather than operating continuously, reducing power consumption while maintaining detection capability
2Use of energy by moving object
If the sensor is turned off for a predetermined time after detection, then power consumption is reduced, but detection accuracy deteriorates
Solution Approach 1:
The sensor's operational state is dynamically adjusted based on real-time detection conditions and environmental factors, allowing the system to maintain high detection accuracy while optimizing power consumption
Solution Approach 2:
The system uses feedback from multiple sensors (sound, motion, position) to determine when to activate the human detection sensor, ensuring accurate detection while minimizing unnecessary power consumption
3Device complexity
If uniform power control is applied to the sensor, then device complexity is reduced, but adaptability deteriorates
Solution Approach 1:
The control system is segmented into multiple independent components (sound detection unit, motion detection unit, position detection unit, and human detection unit), each handling specific functions to reduce overall system complexity while improving adaptability
Solution Approach 2:
The control mechanism dynamically adjusts sensor operation based on multiple detection parameters (sound, motion, position) rather than applying uniform control, enhancing adaptability to different situations
Data Source
AI summary
[Problems to be solved] To provide an information terminal, a power saving method in the information terminal and a recording medium which records a program which are capable of efficiently suppressing power consumption related to human detection.[Solution] A human detector performs human detection processing using a captured image by a camera and notifies a control unit of the detection result. Various sensors, an RF unit and a position information detector acquire information related to a change in a position of the information terminal and notify the control unit. The control unit performs power control for the camera on the basis of at least one of the human detection processing result and the information related to the change in the position of the information terminal.