Resonant Sensor Signal Strength Control for Frequency Stability
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Solution Overview
Problem
Existing physical quantity measuring systems face accuracy issues due to changes in resonant frequency caused by excitation intensity and communication distance, leading to inaccurate temperature and physical quantity measurements.
Innovation Solution
A physical quantity measuring device with an excitation signal generation unit, antenna, reception strength detection unit, and excitation control unit that adjusts signal strength by generating burst waves and controlling excitation signal frequency channels to maintain accurate resonant frequency measurements, independent of excitation intensity and communication distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the excitation intensity is increased to improve the signal strength for wireless communication, then the communication reliability is improved, but the resonant frequency shifts and measurement precision deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of excitation signal parameters (frequency and intensity) based on real-time resonance state detection. The system continuously monitors the resonance reverberation signal and adapts the excitation parameters to maintain optimal measurement conditions while ensuring reliable wireless communication, resolving the contradiction between communication reliability and measurement precision.
Solution Approach 2:
The patent changes the parameters of the excitation signal (frequency and intensity) based on the detected resonance state. By adjusting these parameters dynamically, the system maintains accurate resonant frequency measurement while ensuring sufficient signal strength for wireless communication, thus resolving the contradiction between measurement precision and communication reliability.
2Reliability
If the communication distance is reduced to improve signal strength, then the communication reliability is improved, but the excitation intensity increases and causes resonant frequency shift
Solution Approach 1:
The patent employs feedback control where the resonance reverberation signal is detected and used to adjust the excitation signal parameters. This feedback mechanism ensures that even when communication distance varies, the excitation intensity is dynamically adjusted to prevent resonant frequency shift, maintaining measurement precision while ensuring communication reliability.
Solution Approach 2:
The system dynamically adjusts excitation parameters based on the actual communication conditions and resonance state. This dynamic adaptation allows the system to maintain measurement precision across varying communication distances while ensuring reliable signal transmission.
3Loss of information
If the excitation signal strength is increased to ensure reliable wireless communication, then the signal-to-noise ratio is improved, but the resonant frequency varies and measurement accuracy deteriorates
Solution Approach 1:
The patent dynamically changes the parameters of the excitation signal based on the detected resonance state. By adjusting the frequency and intensity parameters adaptively, the system maintains a high signal-to-noise ratio for reliable communication while preventing resonant frequency variation, thus preserving measurement accuracy.
Solution Approach 2:
The system implements dynamic parameter adjustment where the excitation signal characteristics are continuously optimized based on real-time resonance detection. This dynamic approach ensures optimal signal-to-noise ratio without compromising measurement accuracy, resolving the contradiction between information quality and measurement precision.
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 solution ensures high-accuracy measurement of physical quantities by stabilizing the resonant frequency, reducing errors caused by excitation intensity and communication distance variations, thereby improving the precision of temperature and other physical quantity measurements.
Implementation Method 1
a resonator having temperature characteristics affecting a resonant frequency and generating a resonance reverberation signal at a resonant frequency
Implementation Method 2
a sensor-side antenna and a resonator... transmits an excitation signal to the resonator... The resonance reverberation signal is transmitted to the temperature measuring device via the sensor-side antenna
Data Source
AI summary
An excitation signal generation unit generates excitation signals of frequency channels with mutually different frequency bands and transmits the excitation signals via an antenna. Reception signals of the frequency channels received by the antenna are inputted to a reception strength detection unit. The reception strength detection unit detects a resonance reverberation signal from the reception signals and detects the signal strength of the resonance reverberation signal. An excitation control unit controls the excitation signal generation unit to adjust the signal strength of the excitation signal such that the signal strength of the resonance reverberation signal reaches or falls below a level adjustment threshold. Upon the signal strength of the resonance reverberation signal reaching or falling below the level adjustment threshold, a temperature detection unit subjects the resonance reverberation signal to a frequency analysis so as to detect a physical quantity on the basis of a frequency spectral peak.