Solenoid Valve Stroke Velocity Acceleration Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solenoid valves lack the ability to predict and prevent malfunctioning in real-time, relying on position sensors that provide feedback only after the valve has deviated from its intended position, leading to potential risks and damages.
Innovation Solution
A solenoid valve with a control unit that analyzes the stroke, velocities, and accelerations of the valve element, using a position sensor to determine movement behavior and compare it to reference values, allowing for early detection of potential failures and maintenance planning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a position sensor is used to monitor valve element position, then the valve position can be detected, but the feedback always runs one step behind the actual situation and cannot predict malfunctioning
Solution Approach 1:
The patent applies preliminary action by calculating velocity and acceleration from position measurements before actual malfunction occurs. The control unit continuously computes derivatives of position data to detect abnormal movement patterns that precede valve failure, enabling predictive maintenance rather than reactive response.
Solution Approach 2:
The patent introduces velocity and acceleration as intermediary parameters between position detection and malfunction prediction. These derived parameters serve as mediators that reveal underlying mechanical issues (friction, binding, wear) before they manifest as complete valve failure, bridging the gap between simple position sensing and reliable failure prediction.
2Ease of operation
If feedback control is implemented to adjust valve opening, then the valve can be accurately positioned, but it still cannot predict future malfunctioning
Solution Approach 1:
The patent implements feedback by continuously monitoring velocity and acceleration patterns and comparing them against expected operational ranges. When abnormal patterns are detected (indicating increased friction, binding, or wear), the system generates warnings or alarms, providing feedback about impending failures before they affect valve positioning accuracy.
Solution Approach 2:
The patent applies dynamics by transitioning from static position monitoring to dynamic movement analysis. By examining velocity and acceleration characteristics during valve operation, the system captures transient behavioral patterns that reveal mechanical degradation, enabling prediction of future positioning issues before they occur.
3Productivity
If the valve element movement is monitored continuously, then real-time position data is available, but the system cannot detect friction or binding issues
Solution Approach 1:
The patent applies parameter changes by transforming position data into velocity and acceleration parameters through mathematical differentiation. This parameter transformation reveals subtle changes in valve element movement characteristics that indicate friction or binding, making these previously undetectable issues measurable through standard position sensing infrastructure.
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
Enables predictive maintenance, increasing the Safety Integrity Level (SIL) from SIL3 to SIL4 by providing real-time feedback on the health status and failure modes of the valve, reducing downtime and ensuring reliable operation.
Implementation Method 1
An electrical coil for generating a magnetic field is provided for moving the valve element between a first (closed) end position and a second (open) end position
Implementation Method 2
A position sensor is provided for detecting axial positions of the valve element inside the bore
Data Source
Figure 1~2
Figure 3~4
AI summary
A solenoid valve comprises a housing 2 having an axial bore 7 which is in flow connection with at least an inlet port and an outlet port 3, 5, a valve element 8 which is moveable to and fro in the axial direction of the bore 7, an electrical coil 13 for generating a magnetic field for moving the valve element 8 between a first end position, in which it lies sealing against a seat 9' in order to disconnect said inlet and outlet port 3, 5 from each other, and a second end position, in which it lies at a distance from said seat 9' in order to create a flow opening for connecting said inlet and outlet port 3, 5 with each other, and a position sensor 17 for detecting axial positions of the valve element 8 in the axial direction of the bore 7. A control unit C is provided for determining stroke, velocities and/or accelerations of the valve element 8 in the axial direction of the bore 7 as a function of the detected axial positions during movements of the valve element 8 between its first and second end positions.