Valve Torque Sensing With LDC Sensors on Spinning Drive Trains
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Solution Overview
Problem
Conventional torque monitoring systems for valve actuators are complex and difficult to implement effectively, especially when the drive train is spinning, making it challenging to accurately measure torque in valve systems.
Innovation Solution
The use of inductance-to-digital converter (LDC) sensors, which are magnet-free and can wirelessly sense the position of conductive materials, allowing for contactless measurement of torque by determining the displacement of conductive components within the valve system, thereby calculating the output torque based on known stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional torque monitoring systems are used in valve actuators, then torque measurement capability is provided, but system complexity increases and implementation becomes difficult especially when the drive train is spinning
Solution Approach 1:
The patent replaces complex mechanical torque monitoring systems with a magnetic field-based sensing system. LDC sensors detect the position of a magnet attached to the drive train, and torque is calculated from positional changes rather than direct mechanical measurement. This substitution eliminates the need for complex mechanical torque sensors that would be difficult to implement on spinning components.
Solution Approach 2:
The patent introduces a magnet as an intermediary element that couples the spinning drive train to the stationary LDC sensor. The magnet's position serves as an indirect indicator of drive train state, allowing torque measurement without direct contact or complex mechanical linkages between the spinning and stationary components.
2Measurement precision
If torque sensors are placed on spinning drive train components, then direct torque measurement is possible, but sensor retrieval and data access becomes difficult
Solution Approach 1:
Instead of placing the sensor on the spinning component (drive train), the patent inverts the arrangement by placing the magnet on the spinning component and the LDC sensor on the stationary housing. This allows the sensor to remain stationary and easily accessible while still measuring the position of the spinning component through magnetic field detection.
Solution Approach 2:
The magnetic field acts as an intermediary that transfers positional information from the spinning magnet to the stationary LDC sensor without requiring physical connection. This enables easy sensor retrieval and data access while maintaining accurate torque measurement capability.
3Reliability
If complex mechanical systems are used to monitor torque, then torque threshold control is achieved, but device complexity and maintenance requirements increase
Solution Approach 1:
The patent replaces complex mechanical torque monitoring and control systems with an electronic solution using LDC sensors and microcontroller-based processing. The system measures magnetic field position changes and calculates torque electronically, eliminating the need for complex mechanical linkages, gears, and physical torque sensors that would require extensive maintenance.
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 solution provides a resilient and accurate method for monitoring torque in valve systems, reducing the complexity of mechanical systems and enabling predictive maintenance by directly measuring torque without the need for magnets or complex mechanical setups.
Implementation Method 1
The inductance-to-digital converter (LDC) sensor comprises an inductor and is configured to wirelessly sense a position of at least a portion of the conductive material
Data Source
AI summary
Valve systems and related methods include at least one component comprising a conductive material and at least one inductance-to-digital converter (LDC) configured to wirelessly sense a position of the portion of the conductive material.