Pressure Gauge Deflection Device for Functional Impairment Detection
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Solution Overview
Problem
Pressure gauges face challenges in detecting functional impairments affecting measuring accuracy and operational safety, particularly due to changes in the pressure sensitivity of the measuring diaphragm, properties of the pressure transmitting fluid, and conditions affecting the isolation diaphragm, which are not easily identifiable without altering the external pressure or considering the medium's properties.
Innovation Solution
A pressure gauge with an electronically activatable deflection device that exerts a constant force on the isolation diaphragm, allowing for controlled detection of functional impairments independent of external pressure and fluid properties, using a magnetic or ferromagnetic diaphragm and electromagnet to assess the diaphragm's deflection and pressure sensor measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hydraulic exciter is used to impress pressure fluctuations on the hydraulic pressure transmission path for detecting functional impairments, then functional impairments of the isolation diaphragm can be identified, but the external pressure acting on the isolation diaphragm and the properties of the medium impair the functional test
Solution Approach 1:
The patent extracts the functional test from the complex environment of external pressure and medium properties by applying the test force directly to the isolation diaphragm, bypassing the hydraulic pressure transmission path and its fluid properties, thus eliminating their interfering influence on the measurement
Solution Approach 2:
The patent introduces a magnetic field as an intermediary to transmit the test force from the electromagnet through the isolation diaphragm to the measuring diaphragm, avoiding direct mechanical contact and eliminating the need for hydraulic fluid transmission, thereby removing the harmful influence of medium properties
2Reliability
If the amplitude of pressure fluctuations is used for functional testing, then the state of the isolation diaphragm can be assessed, but changes in pressure transmission properties of the fluid during operation impair the functional test
Solution Approach 1:
The patent removes the hydraulic pressure transmission path and its variable fluid properties from the functional test by applying the test force directly to the isolation diaphragm, making the test independent of fluid compression, gas bubbles, and temperature effects
Solution Approach 2:
The patent replaces the hydraulic mechanical transmission system with a magnetic field-based force transmission system, where the electromagnet directly acts on the isolation diaphragm through magnetic attraction, eliminating the need for pressure transmission through fluid
3Measurement precision
If pressure gauges are calibrated at regular intervals by removing them from the point of use, then measuring accuracy can be checked, but productivity is reduced due to downtime and intervention in the process
Solution Approach 1:
The patent enables the pressure gauge to perform its own functional self-test during normal operation by activating the electromagnet to apply a known test force to the isolation diaphragm, allowing continuous monitoring without removing the device from service
Solution Approach 2:
The patent performs preliminary functional checks continuously during operation by applying small test forces through the electromagnet, detecting potential impairments before they affect measuring accuracy, thereby preventing the need for corrective downtime
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 early detection of functional impairments in the pressure gauge components without altering the external pressure or considering the medium's properties, ensuring consistent measuring accuracy and operational safety through controlled force application and analysis of pressure changes.
Implementation Method 1
the isolation diaphragm is magnetic or ferromagnetic or is connected to a magnetic or ferromagnetic element, and the deflection device comprises an electronically activatable electromagnet which, when activated, exerts the force deflecting the isolation diaphragm
Data Source
AI summary
Disclosed is a pressure gauge comprising a pressure sensor and a pressure transmitter connected upstream of the pressure sensor and having an isolation diaphragm enclosing a pressure receiving chamber. A hydraulic pressure transmission path is connected to the pressure receiving chamber and is filled with a pressure transmitting fluid that transmits the pressure acting on the outer side of the isolation diaphragm to the pressure sensor The pressure gauge allows functional impairments of the pressure gauge to be detected early without having to change the pressure acting on the outer side of the isolation diaphragm. The pressure transmitter comprises an electronically activatable deflection device which is designed in such a way that, when activated, it exerts a constant force deflecting the isolation diaphragm, on the isolation diaphragm, or on an element connected to the isolation diaphragm.