Metal Filter Housing Wireless Coupling Across a Partition Wall
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Solution Overview
Problem
Existing filter devices with metal housings face challenges in performing wireless transmission due to the need for slits, which can cause housing failure and reduce design freedom.
Innovation Solution
A filter device design that includes a partitioned metal case with a filtration member and a measurement unit, utilizing magnetic resonance coupling between antenna coils on either side of a metal partition wall to enable wireless transmission across the metal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If slits are provided in the metal housing to enable wireless transmission, then wireless transmission capability is improved, but housing strength and reliability deteriorate due to stress fatigue
Solution Approach 1:
The patent introduces a magnetic field as an intermediary to enable wireless transmission through the metal housing without physical openings. The first antenna coil generates a magnetic field that penetrates the metal housing to induce current in the second antenna coil, serving as a mediator that transfers energy through the barrier without compromising the housing structure.
Solution Approach 2:
The patent replaces the mechanical approach of creating physical slits or openings in the housing with an electromagnetic field-based approach. Instead of mechanically altering the housing structure to enable transmission, the solution uses magnetic resonance coupling to achieve wireless communication and power transfer through the intact metal housing.
2Adaptability or versatility
If slits are provided in the metal housing to enable wireless transmission, then wireless transmission capability is improved, but design freedom is reduced
Solution Approach 1:
The magnetic field acts as an intermediary that enables wireless transmission without requiring any modifications to the housing design. The metal housing remains intact with no slits or openings, preserving full design freedom while achieving the desired wireless transmission capability through the magnetic resonance coupling mechanism.
3Productivity
If antenna coils are positioned across the metal partition wall to enable wireless transmission, then wireless transmission efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the antenna system into two separate coils positioned on opposite sides of the metal partition wall. The first antenna coil is placed in one chamber and the second antenna coil in the other chamber, allowing each coil to be optimized for its specific location while maintaining efficient magnetic coupling across the partition.
Solution Approach 2:
The patent optimizes the local magnetic field distribution by positioning the antenna coils at specific locations relative to the metal partition wall. The coils are configured to create a concentrated magnetic field in the region between them, enhancing transmission efficiency while accounting for the local electromagnetic environment created by the metal partition.
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 efficient wireless transmission and monitoring of liquid properties across metal partitions, enhancing design flexibility and reducing mechanical stress on the housing.
Implementation Method 1
The filter device performs transmission by magnetic resonance coupling between the first antenna coil and the second antenna coil
Data Source
AI summary
A filter device includes: a filter element including a filtration member configured to filter a liquid and an IC tag including a first antenna coil; a filter case in which the filter element is installed; and a measurement unit installed in the filter case and including an antenna including a second antenna coil. The filter device performs transmission by magnetic resonance coupling between the first antenna coil and the second antenna coil. The filter case includes a partition wall that partitions an internal space into a first region provided with the filter element and a second region not provided with the filter element and is made of metal. The measurement unit includes a housing attached to the filter case. While the housing is disposed in the filter case, a tip end of the housing is inserted in the second region.