Adaptive Carrier Frequency Sensing for User Presence Detection
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Solution Overview
Problem
Existing electronic apparatuses face challenges in accurately detecting users due to preset operating radii and angles of sensors like PIR and high power consumption with camera-based detection, leading to inefficiencies in resource usage.
Innovation Solution
An electronic apparatus that adaptively detects users by changing carrier frequencies to match the surrounding space, using communication interfaces to identify objects through reflected signals, and employs microphones to confirm user presence, reducing power consumption and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a PIR sensor is used to detect users, then the electronic apparatus can detect user presence, but the detection accuracy is limited by preset operating radius and angle that cannot reflect surrounding space characteristics
Solution Approach 1:
The patent applies dynamics by making the carrier frequency adjustable rather than fixed. The system dynamically changes the carrier frequency based on the surrounding environment to optimize detection accuracy. The processor controls the communication interface to transmit signals at different carrier frequencies and selects the frequency that provides the best detection performance, making the detection system adaptive to different spatial characteristics.
Solution Approach 2:
The patent changes the physical parameter of carrier frequency to improve detection accuracy. By varying the carrier frequency of the signal transmitted through the communication interface, the system can adapt to different surrounding spaces and achieve better user detection accuracy. The processor determines the optimal carrier frequency by testing different frequencies and selecting the one that provides the best signal reflection characteristics.
2Measurement precision
If a camera is used to detect users, then user identification can be achieved, but power consumption increases and resource usage is inefficient
Solution Approach 1:
The patent replaces the camera-based optical detection system with a communication interface-based electromagnetic signal system. Instead of using a camera to capture images and process visual information, the system uses the communication interface to transmit and receive signals at different carrier frequencies. This substitution significantly reduces power consumption and resource usage while maintaining effective user detection capability.
Solution Approach 2:
The system uses the existing communication interface, which is already part of the electronic apparatus, to perform detection functions. Rather than adding a separate camera system that consumes additional power, the patent makes the communication interface serve dual purposes: both communication and user detection. This self-service approach eliminates the need for additional power-consuming components.
3Measurement precision
If the electronic apparatus transmits signals at multiple carrier frequencies to improve detection accuracy, then user detection becomes more accurate, but the complexity of the detection system increases
Solution Approach 1:
The patent makes the communication interface multi-functional by using it for both communication and detection purposes. The same communication interface that is already present in the electronic apparatus is utilized to transmit signals at different carrier frequencies for user detection. This eliminates the need for separate detection hardware, thereby reducing system complexity while achieving accurate detection through multiple frequency testing.
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 apparatus improves user detection accuracy while optimizing power and resource usage by adaptively adjusting to the environment and using auxiliary sensors like microphones.
Implementation Method 1
a signal generated based on the signal of the first carrier frequency being reflected by a space where the electronic apparatus is disposed
Implementation Method 2
identify that the object is a user based on sound received from the turned-on microphone
Data Source
AI summary
An electronic apparatus is disclosed. The electronic apparatus includes: a communication interface comprising communication circuitry and a processor configured to: control the communication interface to transmit a signal of a first carrier frequency, and based on a signal generated as the signal of the first carrier frequency reflected by a space where the electronic apparatus is disposed not being received through the communication interface within a first threshold time after the signal of the first carrier frequency is transmitted, determine the first carrier frequency as a search carrier frequency; based on the reflected signal being received through the communication interface within the first threshold time after the signal of the first carrier frequency is transmitted, control the communication interface to transmit a signal of a second carrier frequency different from the first carrier frequency; control the communication interface to transmit a signal of the determined search carrier frequency; and identify whether an object is present based on whether a signal is received through the communication interface within a second threshold time after the signal of the search carrier frequency is transmitted.