Motion-Sensing Antenna Control for Lower-Cost SAR Reduction
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Solution Overview
Problem
Existing antenna systems in devices face a challenge in balancing transmission performance with human body radiation exposure, often requiring additional SAR sensors to adjust transmission power, leading to high costs.
Innovation Solution
An antenna control method that utilizes a predetermined network module and an acceleration sensor to monitor screen states, extract sensing data, calculate acceleration variations, and determine motion states to enable or disable electromagnetic wave absorption ratio reduction mechanisms, thereby reducing costs while ensuring reliable control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an additional SAR sensor is added to detect object movement, then antenna transmission power can be adjusted to reduce radiation exposure, but the device cost increases
Solution Approach 1:
The acceleration sensor, originally designed for motion detection functionality, is made multi-functional by using it to detect object proximity and movement for antenna control purposes. This eliminates the need for a dedicated SAR sensor while maintaining the ability to adjust transmission power based on object presence, thereby reducing device cost while addressing radiation exposure concerns
Solution Approach 2:
The system uses the existing acceleration sensor's data processing capabilities to serve the additional function of detecting object movement for antenna power adjustment. By leveraging the sensor's inherent functionality and existing processing units, the system achieves SAR-based control without requiring additional specialized hardware components
2Object-affected harmful factors
If transmission power is reduced to lower electromagnetic absorption ratio, then radiation exposure to human body is reduced, but antenna transmission performance deteriorates
Solution Approach 1:
The antenna transmission power is dynamically adjusted based on real-time detection of object proximity and movement status. The system transitions between different power levels (high power for normal transmission, reduced power when object is detected) to balance transmission performance requirements with radiation exposure reduction, creating a dynamic power control mechanism that adapts to changing conditions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively controls antenna performance by accurately reflecting user usage status, reducing costs, and ensuring reliable antenna control without the need for additional SAR sensors.
Implementation Method 1
calculating an acceleration variation based on the plurality of groups of sensing data; and determining, according to the acceleration variation, a motion state
Data Source
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AI summary
The present application relates to the technical field of the Internet of Things. Disclosed are an antenna regulation and control method and apparatus, and a storage medium and an electronic device. The method comprises: if a screen state is a screen-on state, extracting multiple groups of sensing data of an acceleration sensor according to a corresponding cycle and the number of groups; calculating an acceleration variation; and according to the acceleration variation, obtaining moving and standing states for determining whether to disable a specific-absorption-ratio reduction mechanism. The present application ensures the reliability of antenna regulation and control and reduces the costs of antenna regulation and control.