Fluid Line Connector RFID Securement Detection for Automated Assembly

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Solution Overview

Problem

Existing connector assemblies for fluid lines require physical interaction and visual verification for proper and full engagement, which is inefficient and not suitable for automated or autonomous assembly and inspection processes.

Innovation Solution

The use of RFID technology to detect proper and full securement between connectors through remote detection, eliminating the need for physical interaction and visual verification, utilizing an RFID chip and interrogator to transmit and receive RF signals for automated detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If visual measures such as secondary latches and windows are used to verify proper engagement, then engagement verification is possible, but physical interaction and viewing by assembler or inspector is required

Engineering Contradiction:
Improveengagement verificationVSAvoidphysical interaction requirement
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces mechanical verification systems (secondary latches, visual windows) with an RFID detection system. The RFID chip in the connector body communicates with an interrogator to automatically detect and verify full engagement, eliminating the need for physical interaction or visual inspection by operators.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The connector assembly performs self-verification through the RFID system. The connector body's RFID chip automatically provides engagement status information to the interrogator without requiring external verification actions, enabling the system to verify its own proper engagement.

Inventive Principle:
Principle #25Self-service

2Reliability

If visual measures are employed for engagement verification, then proper connection can be confirmed, but automated or autonomous assembly and inspection processes cannot be used

Engineering Contradiction:
Improveengagement verificationVSAvoidautomated assembly capability
Core Design Contradiction:
ReliabilityVSExtent of automation

Solution Approach 1:

The patent replaces manual visual verification with an automated RFID detection system. The interrogator automatically queries the RFID chip in the connector body and processes the response to determine engagement status, enabling integration with automated assembly and inspection processes without human intervention.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The RFID system provides automated feedback about engagement status. The interrogator receives signals from the RFID chip and can determine whether full engagement has occurred, providing immediate feedback that can be integrated into automated control systems for assembly verification.

Inventive Principle:
Principle #23Feedback

3Extent of automation

If RFID technology is used for remote detection, then automated detection is enabled, but additional detection components are added to the connector assembly

Engineering Contradiction:
Improveautomated detection capabilityVSAvoidconnector assembly structure
Core Design Contradiction:
Extent of automationVSDevice complexity

Solution Approach 1:

The RFID chip serves multiple functions: it provides engagement verification, enables automated detection, and can potentially store additional connector identification or configuration data. This multi-functionality justifies the addition of the RFID component within the connector assembly.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 automated and remote detection of proper and full securement between fluid line connectors, facilitating efficient assembly, inspection, and service in various applications, including automotive, aircraft, and marine fluid lines.

Implementation Method 1

The use of RFID technology to detect proper and full securement between connectors through remote detection, eliminating the need for physical interaction and visual verification, utilizing an RFID chip and interrogator to transmit and receive RF signals for automated detection.

Methodology Applied
Scientific EffectRFID (Radio Frequency Identification): Electromagnetic Induction

Data Source

PatentEP3665412B1Fluid line connector and assembly with securement detection
Publication Date: 2026.03.04 NORMA US HOLDING LLC
  • EP3665412B1 patent drawingFigure 1~2
  • EP3665412B1 patent drawingFigure 3~4

AI summary

A fluid line connector and assembly provides remote securement detection and is hence equipped for initial assembly, subsequent quality inspection, and subsequent service techniques that are automated, robotic, and/or autonomous. The fluid line connector includes a body, a radio-frequency identification (RFID) chip, and a switch. The body has a passage for fluid-flow therethrough. The RFID chip has an antenna for transmitting and receiving radio frequency (RF) signals. The switch interacts with the antenna to enable the antenna to transmit and receive RF signals, and to alternatively disable the antenna from transmitting and receiving RF signals.