Bypass Fill Level Measurement With Valve State Validation
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Solution Overview
Problem
Fill level measurement accuracy is compromised in containers with isolating devices, especially when foaming media or strong medium movement occurs, leading to invalid measurements due to closed or partially closed valves, and there is a risk of safety issues if connections are not properly reopened after maintenance.
Innovation Solution
A measuring arrangement with a monitoring device for each container connection that uses radio modules for wireless communication with the measuring instrument, featuring an integrated energy supply and energy harvesting module to ensure continuous operation and accurate measurement validation, including transmission of valve positions and status messages to maintain measurement validity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If isolating devices (ball valves) are used to enable maintenance work on fill level sensors during operation, then the sensor can be completely separated from the process without interrupting it, but the measurement value becomes invalid or negatively influenced when the isolating device is closed or partially open
Solution Approach 1:
A monitoring device is introduced as an intermediary between the isolating device and the fill level sensor. This monitoring device detects the operational state of the isolating device (open/closed) and transmits this information to the evaluation unit, which then validates or invalidates the measurement accordingly. This intermediary system allows the isolating device to remain functional for maintenance purposes while preventing invalid measurements from being accepted.
Solution Approach 2:
The system implements feedback by having the monitoring device continuously monitor the isolating device state and communicate this back to the evaluation unit. The evaluation unit uses this feedback information to determine whether the fill level measurement is valid, creating a closed-loop system that automatically adjusts measurement acceptance based on the isolating device state.
2Reliability
If a bypass arrangement is used to protect the measuring instrument from mechanical effects and foam/wave formation, then the measuring instrument is protected and can rectify measurement difficulties, but additional container connections are required which increase installation complexity
Solution Approach 1:
The monitoring device serves multiple functions: it monitors the isolating device state, communicates with the fill level sensor, and provides validation information to the evaluation unit. By making the monitoring device multi-functional, the system achieves reliable measurement validation without requiring separate dedicated components for each function, thereby reducing overall installation complexity.
Solution Approach 2:
The system replaces complex mechanical bypass arrangements with an electronic monitoring and validation system. Instead of requiring physical bypass tubes and additional container connections, the invention uses electronic sensors and communication systems to monitor and validate measurements, significantly reducing mechanical complexity while maintaining measurement reliability.
3Ease of operation
If isolating valves are used to separate the bypass from the container for maintenance, then work can be carried out on the bypass without emptying the complete container, but there is a safety risk if the container connection is not reopened after maintenance
Solution Approach 1:
The monitoring device provides continuous feedback on the isolating valve state to the evaluation unit. After maintenance work, when the valve is reopened, the monitoring device detects this state change and communicates it to the evaluation unit, which then validates subsequent measurements. This feedback mechanism ensures that the system only accepts measurements when the connection is properly restored, preventing safety issues from unnoticed closed valves.
Solution Approach 2:
The system preemptively prevents safety issues by continuously monitoring the isolating valve state and invalidating measurements when the valve is closed. This preliminary anti-action approach ensures that even if maintenance personnel forget to reopen the valve, the system will not accept invalid measurements, thereby preventing potential safety problems before they can occur.
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
Ensures accurate and reliable fill level measurements by monitoring container connection consistency, reducing human errors and sedimentation-related issues, and allowing for maintenance without disrupting the process, while minimizing installation and cabling efforts.
Implementation Method 1
the energy harvesting module (21) is coupled with the valve (7) in such a way that it generates energy due to a movement of the valve (7)
Data Source
AI summary
A measuring arrangement for measuring a fill level in a bypass of a container with a measuring instrument, in particular a fill level or point level measuring instrument, wherein the bypass is connected to the container by means of at least two container connections, characterized by a monitoring device for monitoring a consistency of the container connections, which is coupled with the measuring instrument.