Filter Device IC Tag Detection in Metal Housing
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Solution Overview
Problem
Existing filter devices with metal housings face challenges in detecting IC tags due to radio wave reflection and magnetic flux restriction.
Innovation Solution
A filter device design that includes a metal head covering the opening of a filter case, a tubular filtration member, a metal plate with apertures exposing the IC tag, and an antenna unit with a rod-shaped case inserted into the head, allowing the IC tag to be detected even in metal-housed devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal is used for the housing (plate and head), then structural strength and durability are improved, but radio wave reflection and magnetic flux restriction occur, preventing IC tag detection
Solution Approach 1:
The metal plate is segmented by providing multiple apertures that expose portions of the IC tag. This segmentation allows radio waves to pass through the plate to reach the IC tag, overcoming the blocking effect of the continuous metal surface while maintaining the structural integrity of the overall metal housing.
Solution Approach 2:
The apertures in the metal plate act as intermediaries that facilitate radio wave transmission between the antenna and the IC tag. These openings serve as pathways that mediate the interaction between the electromagnetic field and the IC tag, enabling communication despite the presence of the metal housing.
2Ease of operation
If the antenna is placed inside the metal housing, then protection and integration are improved, but radio wave transmission is blocked, preventing IC tag communication
Solution Approach 1:
The antenna unit is nested within the metal head housing, with the antenna section positioned inside the head. This nested arrangement provides protection and integration while the apertures in the plate allow radio waves to penetrate through the metal housing to reach the IC tag, resolving the conflict between enclosure and transmission.
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 reliable detection of IC tags in filter devices with metal housings, facilitating secure operation and management by ensuring accurate communication between the IC tag and the antenna unit.
Implementation Method 1
an antenna section (32) including an antenna (34) configured to communicate with the IC tag (40)
Implementation Method 2
radio waves are reflected by the metal or a magnetic flux otherwise passing through a loop antenna constituting the antenna is restrained from passing through
Implementation Method 3
a magnetic flux otherwise passing through a loop antenna constituting the antenna is restrained from passing through
Data Source
AI summary
A head made of metal is provided covering an opening of a filter case, and a filtration member having a tubular shape is provided in an internal space formed by the filter case and the head. A plate made of metal is provided near the opening of the filter case, and an IC tag is provided between the filtration member and the plate. The head is provided with an antenna unit including an antenna section including an antenna configured to communicate with the IC tag. The antenna unit includes a case having a rod shape and at least partially inserted into the head, the antenna section is provided adjacent to a first end corresponding to one end of the case, the case is provided in the head such that the antenna section is exposed when the head is viewed from a side of the filter case, and the plate is provided with an aperture from which the IC tag is exposed.