Electromagnetic Resonant Coil Sensing for High-Sensitivity Weight Detection
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Solution Overview
Problem
Conventional volume and weight sensors for gas/liquid measurement have limited sensitivity due to their linear nature, and temperature variations affect density calculations, leading to inaccuracies in detecting remaining raw materials.
Innovation Solution
An electromagnetic coupling sensing device utilizing a frequency generation module, first and second resonant modules, and an echo acquisition and processing module, which adjusts to critical coupling for enhanced sensitivity by detecting subtle changes in intrinsic frequency through a coil deformation mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional volume sensors or weight sensors are used for measurement, then the device structure is simple, but the sensitivity is limited due to the linear nature of the sensors
Solution Approach 1:
The patent employs a coil that can vibrate or deform in response to weight changes. This mechanical vibration approach transforms the measurement from a static linear sensor reading to a dynamic response, significantly enhancing sensitivity to weight changes while maintaining a relatively simple structural configuration.
Solution Approach 2:
The invention changes the operating parameter from static linear measurement to dynamic frequency or resonance-based measurement. By monitoring changes in the coil's vibrational characteristics or electromagnetic resonance in response to weight, the system achieves higher sensitivity without proportionally increasing structural complexity.
2Measurement precision
If volume measurement or weight measurement is used for gas/liquid detection, then the measurement method is conventional and simple, but temperature variations affect density calculations leading to inaccuracies
Solution Approach 1:
The patent replaces conventional mechanical or hydrostatic volume/weight measurement systems with an electromagnetic-based measurement system. By using a coil's electromagnetic properties and mechanical deformation in response to weight, the system directly measures weight without requiring density calculations that are sensitive to temperature variations.
Solution Approach 2:
The invention extracts the weight measurement function from the temperature-dependent density calculation process. By directly measuring weight through coil deformation or vibration characteristics, the system eliminates the intermediate step of density calculation that introduces temperature-related errors.
3Measurement precision
If linear sensors are used for raw material detection, then the device structure is simple, but the sensitivity to subtle weight changes is insufficient
Solution Approach 1:
The patent utilizes the coil's ability to vibrate or deform mechanically in response to weight changes. This vibration-based measurement approach provides significantly higher sensitivity to subtle weight changes compared to linear sensors, as the vibrational frequency or amplitude changes can be detected with high precision.
Solution Approach 2:
The invention transitions from static linear sensing to dynamic vibration-based sensing. By monitoring the coil's dynamic response (vibration frequency, amplitude, or resonance characteristics) to weight changes, the system achieves superior detection sensitivity while the coil structure itself remains relatively simple.
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
Improves measurement accuracy and sensitivity by leveraging near-field coupling principles near critical coupling points, minimizing environmental interference, and providing precise detection of weight changes.
Implementation Method 1
The first resonant module generates a primary resonant signal based on the frequency setting signal
Implementation Method 2
The second resonant module couples with the first resonant module through a coupling capacitance to generate a secondary resonant signal based on the primary resonance signal
Implementation Method 3
The coil is capable of carrying a weight to be measured to deform such that an intrinsic frequency of the electromagnetic coupling sensing device changes
Data Source
AI summary
An electromagnetic coupling sensing device includes a frequency generation module, a first resonant module, a second resonant module, and an echo acquisition and processing module. The first resonant module generates a primary resonant signal based on the frequency setting signal generated by the frequency generation module. The second resonant module couples with the first resonant module through a coupling capacitance to generate a secondary resonant signal based on the primary resonance signal. The second resonant module includes a coil. A ferrite is provided in the coil and a height of the coil is higher than the ferrite. The coil is capable of carrying a weight to be measured to deform such that an intrinsic frequency of the electromagnetic coupling sensing device changes. The echo acquisition and processing module collects the secondary resonant signal and outputs a voltage signal changing according to the intrinsic frequency.