Resonant Sensor Reflector Layout for Long-Range State Detection
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Solution Overview
Problem
Conventional detecting systems using electromagnetic waves for state change detection suffer from low accuracy due to attenuation of wave intensity with distance and small changes in resonance peaks, making it difficult to detect state changes with high precision, especially in systems using high-frequency bands.
Innovation Solution
A detecting system comprising a sensor with a metal pattern antenna unit, a back surface reflector, and an isolation layer, where the reader compares reflection characteristics of the sensor with stored data to accurately detect state changes by transmitting and receiving electromagnetic waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If electromagnetic waves in high frequency band are used for miniaturization of sensor, then sensor size is reduced, but detection accuracy drops significantly due to large propagation attenuation factor
Solution Approach 1:
The patent applies resonance phenomenon (electromagnetic vibration) by designing the sensor to resonate at specific frequencies. The sensor includes a resonant structure that amplifies electromagnetic wave interaction, enabling detection despite high frequency attenuation. The resonance enhances the interaction between electromagnetic waves and the sensor, compensating for signal loss over distance.
Solution Approach 2:
The sensor employs composite结构设计 combining conductive materials (for antenna and resonant structures) with substrate materials. This composite approach optimizes both miniaturization and detection performance by selecting materials with appropriate electromagnetic properties to enhance resonance and reduce losses at high frequencies.
2Length of stationary object
If distance between reader and sensor is increased, then detection range is extended, but detection accuracy drops due to inverse fourth power attenuation
Solution Approach 1:
The sensor utilizes resonance to amplify the electromagnetic interaction at the sensor location. By designing the sensor to resonate at the operating frequency, the effective interaction strength is enhanced, allowing detection at longer distances despite the inverse fourth power attenuation of electromagnetic waves in the high frequency band.
Solution Approach 2:
The patent optimizes sensor parameters including resonant frequency, Q-factor, and geometric dimensions to maximize detection range while maintaining accuracy. By tuning these parameters, the sensor achieves optimal performance for extended detection distances, compensating for signal attenuation through enhanced resonance characteristics.
3Ease of manufacture
If conventional sensor structure is used, then manufacturing is simple, but reflected wave intensity is hardly maintained and state detection accuracy is low
Solution Approach 1:
The sensor incorporates a resonant structure that vibrates electromagnetically at specific frequencies. This resonance amplifies the reflected wave intensity, enabling accurate state detection. The resonant design maintains strong reflected signals even with simple manufacturing processes, bridging the gap between ease of manufacture and detection accuracy.
Solution Approach 2:
The sensor design optimizes the electromagnetic 'signature' or reflection characteristics of the sensor structure. By carefully designing the resonant structure geometry and material properties, the sensor produces distinctive and strong reflected wave patterns that enable accurate state detection, similar to how color changes provide visual information.
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 system enables high-accuracy detection of state changes in objects or environmental changes by amplifying resonance phenomena and increasing contrast in reflected wave intensity, improving detection accuracy even at longer distances.
Implementation Method 1
the reader uses a method of detecting a state change in the sensor by receiving reflected waves from the sensor when transmitting electromagnetic waves of a predetermined frequency to the sensor
Implementation Method 2
a back surface reflector that faces the antenna unit via an isolation layer
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A detecting system includes: a sensor (10) that includes an antenna unit (11) formed with a metal pattern, and a back surface reflector (13) that faces the antenna unit (11) via an isolation layer (12); and a reader (20) that transmits electromagnetic waves (Fa) to the sensor (10), receives reflected waves (Fr) from the sensor (10), and compares the reflection characteristics of the sensor (10) detected from the reflected waves (Fr) with the reflection characteristics of the sensor (10) stored in advance, to detect a state change in the sensor (10).