Valve Actuator Wireless Interface Optical Detection
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Solution Overview
Problem
Existing valve actuator control systems face limitations with non-contact mechanical connections, such as magnetic knobs, which require precise distance control and are prone to contamination, leading to reduced functionality and user discomfort due to robust springs and detents, and potential unintended operation modes.
Innovation Solution
A wireless human-machine interface system for valve actuators that includes wireless input devices with force sensors, allowing users to control the actuator without mechanical connections, thereby reducing contamination risks and improving user interaction by detecting applied forces and transmitting signals for actuator control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If magnetic knobs are used for non-contact control input, then protection against fluid contamination is improved, but the distance between magnets and sensors must be tightly controlled which limits functionality
Solution Approach 1:
The patent replaces magnetic field-based detection with optical detection using light-emitting diodes (LEDs) and photodetectors. This substitution allows for a wider range of motion and greater adaptability while maintaining protection against fluid contamination, as optical signals can detect knob position over larger distances compared to magnetic fields.
Solution Approach 2:
The patent changes the detection parameter from magnetic field strength to light intensity. By using LEDs that emit light in response to knob position and photodetectors that measure light intensity, the system achieves greater measurement range and adaptability while eliminating the tight distance control requirements of magnetic sensors.
2Reliability
If robust springs and detents are added to prevent inadvertent knob movement, then reliability is improved, but user effort increases causing discomfort
Solution Approach 1:
The patent replaces mechanical springs and detents with an optical detection system using LEDs and photodetectors. This eliminates the need for robust mechanical components that require strong user forces, allowing users to move knobs with minimal effort while the optical system reliably detects position changes through light intensity variations.
Solution Approach 2:
The optical detection system automatically detects knob position and movement without requiring mechanical assistance from springs or detents. The system self-regulates by measuring light intensity changes caused by knob movement, providing reliable detection without adding mechanical resistance that would increase user effort.
3Measurement precision
If magnetic knobs require movement through a well-defined arc, then measurement precision is improved, but device complexity increases due to design constraints
Solution Approach 1:
The patent replaces arc-based magnetic detection with optical detection using LEDs and photodetectors arranged in arrays. This substitution allows for detection of knob movement in multiple directions and over larger ranges without requiring precise arc constraints, thereby reducing design complexity while maintaining or improving measurement precision.
Solution Approach 2:
The patent transitions from one-dimensional arc-based detection to multi-dimensional detection using arrays of LEDs and photodetectors. By arranging sensors in two-dimensional arrays, the system can detect knob movement in multiple directions simultaneously, eliminating the need for well-defined arcs and reducing design constraints.
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 wireless interface enhances the reliability and usability of valve actuator control systems by preventing contamination, reducing user effort, and minimizing the risk of unintended operation, while maintaining precise control over valve functions.
Implementation Method 1
at least one sensor configured to sense a force applied to the at least one wireless input device by the user
Data Source
AI summary
Valve actuators include a control system and at least one human-machine interface device. Human-machine interface devices include at least one wireless input device operable by a user and at least one sensor configured to sense a force applied to the at least one wireless input device by the user. Valve systems may include such valve actuators. Methods of operating a control system of a valve actuator include sensing a force applied to at least one wireless input device and wirelessly transmitting an electronic signal in response to the applied force.