Electromagnetic Transducer Rod-Membrane Coupling for Automation
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Solution Overview
Problem
Existing electromechanical transducer units, particularly those using piezoelectric elements, face efficiency limitations and mechanical stress issues at high temperatures, while electromagnetic units lack force transmission, leading to reduced efficiency and increased energy requirements.
Innovation Solution
An electromechanical transducer unit with a membrane and three rods secured perpendicularly to a base, where the rods are connected to magnets and a coil, allowing for efficient mechanical oscillations via a magnetic field, minimizing energy requirements and suitable for high-temperature applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If piezoelectric elements are used in electromechanical transducer units, then mechanical stress resistance is improved, but efficiency decreases and high-temperature operation becomes problematic
Solution Approach 1:
The transducer unit is divided into separate functional components: a vibration generator for exciting mechanical oscillations and a vibration receiver for detecting oscillations. This segmentation allows independent optimization of each component, enabling the use of piezoelectric elements for mechanical stress resistance while maintaining efficiency through proper magnetic field coupling in the receiver
Solution Approach 2:
A magnetic field serves as an intermediary between the electrical excitation signal and the mechanical oscillations of the measurement rod. The magnetic field couples the coil to the rod without requiring direct mechanical contact, eliminating force transmission losses and improving efficiency while allowing piezoelectric elements to handle mechanical stress
2Use of energy by moving object
If electromagnetic transducer units are used, then efficiency is improved, but force transmission capability decreases
Solution Approach 1:
The transducer unit is divided into separate functional components: a vibration generator for exciting mechanical oscillations and a vibration receiver for detecting oscillations. This segmentation allows independent optimization of each component, enabling the use of piezoelectric elements for mechanical stress resistance while maintaining efficiency through proper magnetic field coupling in the receiver
Solution Approach 2:
The direct mechanical force transmission system is replaced with a magnetic field-based excitation system. The coil generates a magnetic field that interacts with the measurement rod to produce mechanical oscillations without requiring physical force transmission through mechanical contact, thereby improving efficiency
3Use of energy by moving object
If direct force transmission connection is used, then efficiency is improved, but mechanical stress and high-temperature reliability worsen
Solution Approach 1:
A magnetic field serves as an intermediary between the electrical excitation signal and the mechanical oscillations of the measurement rod. The magnetic field couples the coil to the rod without requiring direct mechanical contact, eliminating force transmission losses and improving efficiency while allowing piezoelectric elements to handle mechanical stress
Solution Approach 2:
The direct mechanical force transmission system is replaced with a magnetic field-based excitation system. The coil generates a magnetic field that interacts with the measurement rod to produce mechanical oscillations without requiring physical force transmission through mechanical contact, thereby improving efficiency and high-temperature reliability
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 solution achieves increased efficiency and extended temperature range operation by optimizing the connection of rods to the membrane, reducing energy consumption, and providing a robust mechanical resonator system.
Implementation Method 1
a coil having a core and secured within the housing above the magnets, wherein the coil is suppliable with an electrical alternating current signal, wherein the coil is embodied to produce a magnetic field, which magnetic field causes the rods by means of the magnets to execute mechanical oscillations
Implementation Method 2
a magnetic field, which magnetic field causes the rods by means of the magnets to execute mechanical oscillations
Implementation Method 3
a membrane displaceable to execute mechanical oscillations, at least three rods secured to the membrane perpendicularly to a base area of the membrane
Data Source
AI summary
The present disclosure includes an electromechanical transducer unit for a field device of automation technology including a membrane having a base area and displaceable to execute mechanical oscillations, three rods secured to the membrane perpendicular to the base area, a housing, wherein the rods extend into the housing, three magnets, each secured to one of the rods opposite the membrane, and a coil having a core and secured within the housing adjacent the magnets, the coil embodied to produce a magnetic field that causes the rods to execute mechanical oscillations. The rods are secured to the membrane such that oscillations of the membrane result from the oscillations of the rods. At least one of the rods is secured to the base area where the second derivative of the deflection of the membrane from a rest position as a function of the site on the base area is essentially zero.