RF Cavity Resonance Sensor for Real-Time Process Monitoring
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Solution Overview
Problem
Current process control systems face limitations such as time delays in sample analysis, restricted parameter monitoring, high complexity and cost due to multiple sensors, indirect and inaccurate measurement of state variables, difficulty in detecting faults, and sensor fouling, especially in systems where direct interaction with the material is required.
Innovation Solution
A radio frequency-based sensing and control system utilizing cavity resonance and waveguide measurements for direct in-situ monitoring of process state variables, enabling fast and accurate feedback control without the need for physical contact, capable of monitoring various parameters including composition, distribution, and physical or chemical properties of materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sample extraction and analysis is used to monitor process parameters, then measurement information is obtained, but time delay and measurement variability occur
Solution Approach 1:
The patent replaces mechanical sample extraction and laboratory analysis systems with an in-situ electromagnetic sensing system. The sensing element emits electromagnetic waves that interact directly with the material in the process stream, eliminating the need for physical sample removal and subsequent analysis, thereby achieving real-time measurement without time delay
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary between the sensor and the material being measured. The sensing element uses electromagnetic waves to probe the material properties in-situ, allowing measurement of parameters such as dielectric constant, conductivity, and composition without direct contact or sample extraction
2Adaptability or versatility
If multiple different sensors are used to measure various system characteristics, then comprehensive parameter monitoring is achieved, but system complexity and cost increase
Solution Approach 1:
The patent implements a universal electromagnetic sensing element that can measure multiple process parameters simultaneously by analyzing different characteristics of the electromagnetic wave interaction with the material. A single sensing element can determine composition, concentration, dielectric properties, and other parameters by processing the reflected or transmitted signal in different ways, eliminating the need for multiple specialized sensors
Solution Approach 2:
The patent exploits changes in electromagnetic wave parameters (frequency, amplitude, phase, polarization) upon interaction with the material to extract multiple process information. By analyzing how the electromagnetic wave characteristics change after interacting with the material, the system can determine various material properties using a single sensing element
3Measurement precision
If conventional sensors are used to indirectly estimate state variables, then measurement is possible, but accuracy and calibration complexity worsen
Solution Approach 1:
The patent replaces indirect mechanical or electrical sensing methods with direct electromagnetic probing. The electromagnetic sensing element directly measures the dielectric properties and composition of the material through its interaction with electromagnetic waves, providing accurate state variable measurement without requiring complex indirect estimation or calibration
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
This system provides real-time, accurate, and non-contact monitoring of process parameters, enabling efficient fault detection and optimization of processes across diverse applications, reducing complexity and cost while improving measurement accuracy and response time.
Implementation Method 1
A sensing and control system and method is disclosed, which utilizes cavity resonance and waveguide measurements to directly monitor process state variables
Implementation Method 2
A sensing and control system and method is disclosed, which utilizes cavity resonance and waveguide measurements to directly monitor process state variables
Data Source
AI summary
A sensing and control system and method is disclosed, which utilizes cavity resonance and waveguide measurements to directly monitor process state variables or detect changes in the state of a system and provide direct in situ feedback control top optimize the process. The same system may be used to monitor a number of different process parameters including the composition, amount, distribution, and physical or chemical properties of a material, or to monitor the state or health of a system or sub-system. The system is broadly applicable to wide range of systems and process including ranging from engines and exhaust systems to production plants.