Integrated Rotary Scale Positioning for Precise Angle Detection
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Solution Overview
Problem
Existing rotational positioning devices face precision issues due to center deviations and assembly errors, leading to inaccuracies in angle detection and target positioning, and are often bulky and costly due to externally installed encoders.
Innovation Solution
Integrally forming a graduated scale with the rotational member and installing sensors in a housing with defined seats to minimize center deviations, allowing precise angle detection and positioning, while reducing device size and cost by eliminating the need for external encoders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an encoder is externally installed to detect rotation angle, then angle detection function is achieved, but device size increases and cost increases
Solution Approach 1:
The graduated scale is integrally formed with the rotational member, merging the measurement component with the rotating component. This eliminates the need for separate external encoders and adapters, reducing device size while maintaining angle detection precision through the integrated scale structure.
2Measurement precision
If an encoder is externally installed to detect rotation angle, then angle detection function is achieved, but manufacturing cost increases
Solution Approach 1:
The graduated scale is integrally formed with the rotational member, eliminating the need for separate external encoders and adapters. This integration reduces the number of components, simplifies assembly, and lowers manufacturing cost while maintaining angle detection precision.
3Measurement precision
If encoder input shaft is connected to rotational member shaft by coupling, then angle detection is enabled, but center deviation occurs causing detection error
Solution Approach 1:
The graduated scale is directly formed on the rotational member, eliminating the intermediate coupling connection between encoder and rotational member shafts. This direct integration removes the source of center deviation and assembly errors, ensuring high positioning precision while maintaining accurate angle detection.
4Measurement precision
If encoder is externally installed, then rotation detection is achieved, but device complexity increases
Solution Approach 1:
The graduated scale is integrally formed with the rotational member, merging the measurement function into the rotating component itself. This eliminates the need for external encoders, adapters, and coupling mechanisms, significantly simplifying the device structure while maintaining rotation detection precision.
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 high-precision detection of angle changes and accurate positioning of rotational members, improving precision by reducing center deviation errors and compactness, and lowering costs by integrating the graduated scale and sensors within the device.
Implementation Method 1
at least one sensor serving as an angle detector... the sensor detects an angle change amount due to rotation of the rotational member based on the plurality of scale marks
Data Source
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AI summary
Provided is a rotational positioning device capable of positioning a rotational angle at a target angle position with high precision. A rotational positioning device 100 is provided with: a housing 101; a rotational member 102 which is rotatable about a rotational member axial line 103 and at least a part of which is accommodated in the housing 101; and at least one sensor 104 installed in the housing 101. A graduated scale 105 with a plurality of scale marks is formed integrally with the rotational member 102 along the circumferential direction of the rotational member 102. The at least one sensor 104 detects an angle change amount due to rotation of the rotational member 102 on the basis of the plurality of scale marks. The rotational member 102 is positioned at the target angle position on the basis of the angle change amount.