Valve Actuator Torque Sensing via Integrated Strain Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for monitoring valve actuator torque are inaccurate and impractical, particularly in harsh environments, due to indirect measurement methods and the challenges of integrating load cells, which are exposed to ambient conditions and require additional time and effort.
Innovation Solution
A torque-sensing system integrated within the actuator housing, using strain gauges to directly measure deformation of the torque and drive modules, providing real-time torque measurements protected from harsh conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If load cells are used to measure torque, then torque measurement capability is provided, but the system becomes exposed to harsh ambient conditions and requires additional installation time and effort
Solution Approach 1:
The torque sensing system is merged with the actuator housing, integrating the sensor element directly into the existing structure. This eliminates the need for separate load cells and their associated mounting hardware, while protecting the sensor from harsh conditions through the housing enclosure.
Solution Approach 2:
The actuator housing serves as an intermediary protective barrier between the sensor element and the harsh ambient environment. The housing shields the sensor from direct exposure to corrosive substances, moisture, and other harmful factors while still allowing the sensor to detect deformation of the torque module.
2Measurement precision
If load cells are used to measure torque, then torque measurement capability is provided, but additional installation time and effort are required
Solution Approach 1:
The torque sensing system is integrated into the actuator housing as a unified component, eliminating the need for separate load cell installation. The sensor element is pre-positioned within the housing to detect deformation of the torque module, reducing installation to a single integrated unit.
Solution Approach 2:
The actuator housing itself serves the dual function of structural enclosure and sensor mounting platform. The housing's existing structure is utilized to position and protect the sensor element, eliminating the need for additional mounting hardware and installation steps required by separate load cells.
3Device complexity
If indirect measurement methods are used, then system complexity is reduced, but measurement accuracy deteriorates
Solution Approach 1:
The patent replaces indirect mechanical measurement methods with direct strain detection using a sensor element. The sensor directly measures deformation of the torque module, providing accurate torque data without complex mechanical linkages or calculation systems.
Solution Approach 2:
The sensing function is extracted from separate external components (load cells) and integrated directly into the actuator's torque transmission path. The sensor element is positioned to directly detect strain in the torque module, eliminating the need for indirect measurement and complex signal processing.
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 offers accurate, real-time torque monitoring, reducing maintenance costs and enabling early detection of potential issues, suitable for use in various environments without additional installation time or effort.
Implementation Method 1
the sensor element is configured to detect a deformation of at least one of the torque module or the force-transfer element along an axis that extends transverse to the central axis during operation of the drive module to apply a torque to the torque module
Data Source
AI summary
An actuator for a valve can include a torque module and a drive module that is configured to transmit rotational force from the torque module to a valve member (e.g., to selectively open and close the valve by rotating a flow control element thereof). A torque-sensing system can include a sensor element configured to detect a deformation of at least one of the torque module or the drive module, to monitor torque applied by the actuator to the valve.