Magnetic Marker Sensor for Electrical Switch Movement Verification
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Solution Overview
Problem
Conventional methods for checking the switching operation of electrical switches, especially extra-high, high, and medium-voltage switches, are complex and time-consuming due to the difficulty in attaching displacement or angle sensors, particularly in hard-to-reach areas.
Innovation Solution
A method and device using a marking element with a magnetization pattern of magnetic markers that simplifies the detection of movement by determining the relative movement between the marking element and a sensor, allowing for easy attachment and reliable position determination, even in restricted spaces, using a detachable and flexible marking element with a periodically repeating magnetization pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a displacement or angle sensor is installed between the moving switching element and a fixed part of the switch, then the switching process can be verified, but the assembly becomes complex and time-consuming
Solution Approach 1:
The marking element is divided into multiple magnetic markers arranged in a pattern, allowing the sensor to detect position through discrete magnetic field variations rather than requiring a single complex sensor assembly. This segmentation simplifies the overall system while maintaining measurement precision.
Solution Approach 2:
The patent replaces complex mechanical sensor mounting structures with a magnetic field-based detection system. The marking element with magnetic markers creates a magnetic field pattern that the sensor can read without physical contact or complex mechanical attachment, thereby reducing device complexity.
2Measurement precision
If a displacement or angle sensor is installed in hard-to-reach areas, then the switching process can be verified, but the installation becomes time-consuming
Solution Approach 1:
The marking element is designed to be self-contained with integrated magnetic markers, allowing it to be simply attached to the moving switching element without requiring complex installation procedures. The element essentially installs itself through straightforward attachment to the component surface.
Solution Approach 2:
The marking element serves multiple functions: it provides position encoding through magnetic markers, attaches easily to various surfaces, and works with different sensor types. This multi-functionality reduces installation time by eliminating the need for specialized installation procedures for different locations.
3Measurement precision
If multiple optical markers are used for position detection, then the position can be determined accurately, but the application becomes challenging in difficult-to-access areas
Solution Approach 1:
The patent replaces optical markers with magnetic markers, eliminating the need for optical access and lighting. The magnetic field can penetrate materials and work in environments where optical detection would be difficult, thereby improving ease of operation in hard-to-reach areas while maintaining position determination accuracy.
Solution Approach 2:
The patent changes the detection parameter from optical to magnetic. This parameter change allows the marking element to function in environments where optical detection is difficult, such as areas with unfavorable lighting conditions or restricted access, thereby improving ease of operation.
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
Facilitates efficient and easy assembly of the detection system, enabling accurate analysis of the switching process, including speed and braking performance, and automatic evaluation of quality criteria, with the ability to generate warnings for maintenance needs.
Implementation Method 1
A marker element is used that has a magnetization pattern with multiple magnetic markers
Data Source
Figure 1~2
Figure 3~6
AI summary
To verify the switching operation of an electrical switch (1-3), the movement of a movable switching element (1) of the electrical switch (1-3) is detected during the switching operation. For this purpose, a marker element (11) is used, wherein the marker element (11) has a magnetization pattern comprising several magnetic markers. A path length (7) of a relative movement between the marker element (11) and a sensor (12) is determined.