Magnetic Sensor Nested in Screw Thread for Manipulation Detection
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Solution Overview
Problem
Existing sensor arrangements for monitoring screw connections lack a compact design and provide only a low level of protection against manipulation, with components requiring a large amount of space.
Innovation Solution
A sensor arrangement featuring a magnetic field sensor and a magnet integrated into a screw connection, allowing for precise detection of changes in relative position between the magnet and sensor, enabling reliable manipulation detection with a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sensor arrangements are used for monitoring screw connections, then manipulation detection is provided, but the components require a relatively large amount of space and only achieve a low level of protection against manipulation
Solution Approach 1:
The magnetic field sensor is integrated into the first component (e.g., threaded tube) while the magnet is integrated into the second component (e.g., cap nut), allowing both sensing elements to be nested within the existing screw connection structure rather than requiring external mounting space
Solution Approach 2:
The patent replaces conventional mechanical sensor arrangements with a magnetic field-based detection system, using a magnet and magnetic field sensor to detect relative position changes, thereby reducing mechanical complexity and space requirements while improving manipulation detection reliability
2Volume of moving object
If the magnetic field sensor and magnet are integrated into the screw connection components, then a compact design is achieved, but precise detection of manipulation must be ensured
Solution Approach 1:
The control unit continuously monitors the magnetic field signal from the magnetic field sensor, compares the detected relative position against stored reference values, and provides feedback to determine whether manipulation has occurred, ensuring high measurement precision even with compact integration
Solution Approach 2:
The system detects manipulation by monitoring changes in magnetic field parameters (strength, direction, position) as the relative position between the magnet and magnetic field sensor changes, allowing precise detection of even small angular deviations (0.1° to 5°) despite compact component integration
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 sensor arrangement achieves high protection against manipulation by detecting angle rotations as small as 0.1° to 5° with high accuracy, ensuring secure monitoring of screw connections while maintaining a compact structure.
Implementation Method 1
The magnetic field sensor (32) and the magnet (34) are arranged and designed in such a way that a change in the relative position between the magnet and the magnetic field sensor can be detected
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
A sensor arrangement (10) for monitoring a screw connection (12) between a first component (14) with an external thread and a second component (18) with an internal thread, wherein the second component (18) with an internal thread is connectable to the first component (14) with an external thread, comprises a magnetic field sensor (32) and a magnet (34). The magnetic field sensor (32) is inserted into the first component (14) with an external thread, and the magnet (34) is integrated into the second component (18) with an internal thread. The magnetic field sensor (32) and the magnet (34) are arranged and configured such that a change in the relative position (40a, 40b) between the magnet (34) and the magnetic field sensor (32) is detectable. The sensor arrangement (10) detects a manipulated state of the screw connection (12) when it detects a change in the relative position (40a, 40b) between the magnet (34) and the magnetic field sensor (32).