Magnetic Actuation Indicator Using Repulsive Magnet Displacement
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Solution Overview
Problem
Magnetically actuated devices, such as valves, are difficult to determine actuation status without external assistance, and existing non-contact methods often compromise device performance by requiring additional force, making it hard to diagnose functionality and provide clear visual indications.
Innovation Solution
An indicating apparatus with a controllably displaceable stem, core, and plugnut, utilizing an indicating magnet with the same polarity as the plugnut, which is repelled to provide visual indication of actuation, and a guiding arrangement to facilitate movement without affecting device performance, including a container for protection and visibility, and optional sensors for signal generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If a non-contact type transducer with magnetic stem is added to identify actuation, then actuation status can be identified, but more pulling force is required and device performance is adversely affected
Solution Approach 1:
A non-magnetic rod serves as an intermediary mechanical connector between the stem and the indicating magnet assembly. This rod transmits the stem's linear displacement to the indicating magnet without requiring magnetic interaction, thereby eliminating the need for additional magnetic pulling force while still enabling actuation status detection through visual indication.
Solution Approach 2:
The patent replaces the conventional magnetic stem-based indication system with a mechanical rod-based system. Instead of using magnetic fields to transmit motion information (which requires additional pulling force), a non-magnetic mechanical rod directly transmits the stem's position to the indicating magnet, substituting magnetic interaction with direct mechanical coupling that does not affect the actuation force.
2Object-affected harmful factors
If the core and stem are disposed in a thick metal casing, then device is protected, but it is difficult to identify actuation status by manually checking
Solution Approach 1:
The indicating magnet is designed with distinct visual characteristics (such as color or position-based visual cues) that change or move in response to actuation status. When the stem moves to indicate actuation, the indicating magnet shifts position or changes its visual appearance, providing clear visual feedback through the transparent or translucent casing without compromising protection.
Solution Approach 2:
The indication system transitions from hidden internal mechanical movement to visible external visual display. The indicating magnet converts the linear displacement of the stem into a visually observable position change or color change that can be seen through the casing, adding a visual dimension to the actuation status information while maintaining the protective enclosure.
3Loss of information
If visual indication is provided through direct connection, then actuation is indicated, but friction is introduced affecting operation
Solution Approach 1:
The non-magnetic rod acts as a frictionless intermediary that mechanically couples the stem's motion to the indicating magnet without introducing significant friction. Since the rod is non-magnetic and operates in a non-contact manner with the magnetic components, it transmits motion information without the friction that would arise from direct magnetic or mechanical contact between moving parts.
Solution Approach 2:
The patent eliminates friction-prone direct mechanical connections by using a non-magnetic rod that operates independently of the magnetic actuation system. This substitution replaces potential friction sources with a clean mechanical transmission path that does not interfere with the magnetic fields or introduce significant resistance to motion.
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 apparatus provides clear visual and amplified indications of actuation without affecting device performance, offering frictionless and non-contact operation, allowing easy identification of actuation status without compromising the device's functionality.
Implementation Method 1
The electric coil, when energized, induces magnetic field in the plugnut
Implementation Method 2
have the polarity of a side of the indicating magnet being the same as the polarity induced in a side of the plugnut facing the side of the indicating magnet, due to which repulsive force is developed between the plugnut and the indicating magnet
Data Source
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AI summary
The present disclosure relates to the field of indicating apparatuses for magnetically actuated devices. An apparatus (100), disclosed in the present disclosure, provides an indication when a magnetically actuated device is actuated without affecting the device performance. The apparatus (100) comprises a magnet (110, 150), a guiding arrangement (120), and an indication unit (130, 155). The magnet (110, 150) is disposed on a plugnut (55) of an actuation unit (50) which actuates t he device (52). A side (112, 152) of the magnet (110, 150) facing a side (57) of the plugnut (55) has same polarity as that of the side (57) of the plugnut (55). Due to same polarities, when the plugnut (55) is energized, the magnet (110, 150) is repelled by the plugnut (55). The indication unit (130, 155) identifies the displacement of the magnet (110, 150), and provides a visual indication to indicate actuation of the device (52).