Optical Positioning Calibration for Multi-Axis Sensor Crosstalk
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Solution Overview
Problem
In optical systems with movable and fixed parts, achieving accurate measurement and positioning becomes challenging due to the crosstalk effect when the movable part moves in multiple dimensions simultaneously, making precise control difficult.
Innovation Solution
The optical system incorporates a driving assembly, first and second sensors, and a control unit to detect movement in different dimensions, with error curves established through external calibration, allowing the control unit to calibrate sensing values and transmit driving signals to achieve precise positioning by reducing crosstalk effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If magnetic elements and sensors are disposed on movable and fixed parts to detect displacement in multiple dimensions, then the positioning capability is improved, but measurement accuracy deteriorates due to crosstalk effect
Solution Approach 1:
The patent divides the sensing system into separate single-dimension sensors, where each sensor is dedicated to detecting displacement in one specific dimension. This segmentation eliminates crosstalk between dimensions, as each sensor only responds to its designated dimension's magnetic field changes, thereby maintaining high measurement accuracy while achieving multi-dimensional positioning capability through combination of multiple independent sensors.
2Adaptability or versatility
If multiple sensors detect magnetic fields in different dimensions simultaneously, then the positioning functionality is improved, but control precision deteriorates due to mutual interference
Solution Approach 1:
The patent applies local quality by configuring each sensor with specific directional sensitivity characteristics. Each sensor is designed to be highly sensitive to magnetic field changes in its designated dimension while being insensitive to changes in other dimensions. This localized optimization of sensing properties allows simultaneous multi-axis detection without mutual interference, maintaining high positioning precision across all dimensions.
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 solution enables accurate and precise positioning of the movable part relative to the fixed part in optical systems, effectively mitigating the crosstalk effect and ensuring precise control across multiple dimensions.
Implementation Method 1
The first sensor generates a first sensing value by detecting the movement of the movable part relative to the fixed part in a first dimension
Implementation Method 2
The second sensor generates a second sensing value by detecting the movement of the movable part relative to the fixed part in a second dimension
Data Source
AI summary
An optical system is provided, including a movable part, a fixed part, a first sensor, a second sensor, and a control unit, wherein an optical element is disposed on the movable part. The first and second sensors detect the movement of the movable part relative to the fixed part in a first dimension and a second dimension, and thus they respectively generate a first sensing value and a second sensing value. The control unit generates an error value according to the first sensing value and an error curve, and then calibrates the second sensing value according to the error value.