Photoelectric Encoder Detection Geometry for Harmonic Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing photoelectric detection units face challenges in achieving high area utilization and efficient shape adjustment, particularly due to the complexity of geometric shapes with acute angles, which complicates manufacturing and harmonic suppression.
Innovation Solution
The geometric shape of the photoelectric detection unit is defined by two edges described by distinct functions, incorporating a tilting function, harmonics filtering function, and midline adjustment function, allowing for a fan-shape-to-rectangle transformation to enhance area utilization and simplify shape adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the geometric shape of the photoelectric detection unit is designed with complex curved edges to suppress harmonic components, then the harmonic suppression effect is improved, but the manufacturing difficulty increases and the shape adjustment efficiency decreases
Solution Approach 1:
The photoelectric detection unit is divided into multiple segments along the transverse direction, with each segment defined by a separate function. This segmentation allows the complex curved shape to be constructed from simpler functional segments, making manufacturing more feasible while maintaining the harmonic suppression effect.
Solution Approach 2:
The patent uses mathematical functions to define the geometric shape parameters of the photoelectric detection unit. By adjusting function parameters rather than redrawing complex curves, the shape can be efficiently modified while maintaining manufacturing feasibility and harmonic suppression performance.
2Reliability
If the geometric shape of the photoelectric detection unit includes acute angles to achieve desired harmonic suppression, then the harmonic filtering performance is improved, but the manufacturing difficulty increases significantly
Solution Approach 1:
The patent performs preliminary shape design using mathematical functions that inherently avoid acute angles. By planning the shape construction beforehand with appropriate function selections, the design achieves harmonic suppression without creating manufacturing-difficult acute angle features.
Solution Approach 2:
The geometric parameters are controlled through function parameters, allowing acute angles to be avoided by selecting appropriate function forms and parameter ranges, thus maintaining harmonic filtering performance while ensuring manufacturing ease.
3Reliability
If multiple separate functions are used to define each segment of the photoelectric detection unit, then the harmonic suppression effect is improved, but the adjustment efficiency decreases due to the need to redefine each function
Solution Approach 1:
The patent employs a unified mathematical framework that can describe the entire photoelectric detection unit shape through coordinated functions. This universal approach allows shape adjustments to be made systematically across all segments simultaneously, improving adjustment efficiency while maintaining harmonic suppression effectiveness.
4Area of stationary object
If the photoelectric detection units are arranged to improve layout density and area utilization, then the area utilization is improved, but the geometric shape complexity increases
Solution Approach 1:
The patent uses mathematical functions with adjustable parameters to define the photoelectric detection unit shapes. By optimizing these parameters, the units can be configured to achieve high area utilization while maintaining manageable geometric complexity through systematic parameter adjustment rather than ad hoc shape design.
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
This approach enables high area utilization and efficient shape adjustment, facilitating easier manufacturing and effective harmonic suppression, resulting in improved performance of photoelectric encoders and motors.
Implementation Method 1
a photoelectric encoder converts mechanical displacements of an output shaft into pulses or digital signals through photoelectric conversion
Data Source
AI summary
The present application discloses a photoelectric detection unit, a photoelectric encoder system, and a motor, where the photoelectric detection unit is configured to detect a scanning light stripes representing a displacement of a grating and convert the scanning light signal into an electrical signal representing the displacement of the grating, the electrical signal generated with the scanning light stripes includes harmonic components, and the geometric shape of the photoelectric detection unit is defined to suppress the harmonic components. The present application provides a photoelectric detection unit, a photoelectric encoder system, and a motor that have high area utilization and a high signal-to-noise ratio and can reduce a measurement error and remove the harmonic components more efficiently.