Shaft Inclination Measurement With Integrated Bore Magnet Sensor
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Solution Overview
Problem
Existing angle measuring systems for electric motor shafts are inefficient in terms of cost, assembly, and space usage, as they often require multiple components and complex installations.
Innovation Solution
A device comprising a shaft with a bore, a magnet unit attached to the shaft, a housing part with a projection that houses a magnetic field sensor unit, allowing for compact integration and reduced component count by eliminating the need for external connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional angle measuring system with separate housing and sensor components is used, then the measurement function is achieved, but the device complexity and installation space increase
Solution Approach 1:
The patent combines the housing and sensor mounting structure into a single integrated unit. The sensor is directly mounted on the housing interior surface, eliminating the need for separate sensor housings and external connections. This merging reduces component count while maintaining the measurement function through direct magnetic field detection of the rotating magnet.
Solution Approach 2:
The housing serves multiple functions: it provides structural enclosure, mounts the sensor directly on its interior surface, and positions the sensor relative to the rotating magnet. This multi-functionality reduces the need for additional specialized components while achieving both mechanical support and measurement capabilities.
2Ease of manufacture
If external connections and separate sensor housings are used, then the sensor can be replaced or adjusted, but the assembly complexity and installation time increase
Solution Approach 1:
The sensor is integrated directly into the housing structure, eliminating external connections and separate sensor housings. This simplifies assembly to a single integration step and reduces installation time, while the sensor remains accessible for replacement by removing the housing.
Solution Approach 2:
The housing itself serves as the sensor mounting structure, eliminating the need for separate mounting brackets or external housings. The sensor is positioned and secured directly on the housing interior, making the housing self-sufficient for both structural and sensor mounting functions.
3Area of stationary object
If multiple separate components are used for the measuring system, then each component can be optimized independently, but the total installation space increases
Solution Approach 1:
The housing and sensor mounting structure are merged into a single component. The sensor is mounted directly on the housing interior surface, eliminating the need for separate sensor housings, mounting brackets, and external connections. This reduces the total number of parts and minimizes the installation space required for the measuring system.
Solution Approach 2:
The sensor is nested within the housing structure, with the sensor housing or mounting structure contained within or integrated into the main housing. This nested arrangement reduces the overall footprint and installation space while maintaining all necessary functional components.
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 solution enables more efficient and cost-effective angular position measurement with reduced installation space, allowing for compact designs and simplified assembly while maintaining accurate measurement capabilities.
Implementation Method 1
a sensor unit (30) comprising a magnetic field sensor element (31) arranged on a carrier (34)
Data Source
Figure 1~2
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AI summary
The following describes a device for measuring the angular position or rotational movement of a shaft. According to one embodiment, the device comprises a first housing part and a shaft rotatable about an axis of rotation, arranged within the first housing part. The shaft has a bore extending from an end face of the shaft along the axis of rotation into the shaft. The device further comprises a magnetic unit with at least one permanent magnet arranged within the bore and attached to the shaft, a second housing part with a projection extending into the bore along the axis of rotation, and a magnetic field sensor element arranged inside the projection of the second housing part.