Multi-Unit Optical Sensor Sub-Scanning Resolution
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Solution Overview
Problem
Conventional optical scanning devices face challenges in improving resolution in the sub-scanning direction without increasing detection data obtaining time or decreasing detection distance.
Innovation Solution
The device employs a light source with a plurality of light emitting units and a deflector, paired with an optical detector having multiple light receiving units, allowing simultaneous activation of light emitting units and corresponding light receiving units to enhance resolution in the sub-scanning direction while maintaining efficient data acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional optical scanning device uses a single light emitting unit and a single light receiving unit, then the device complexity is low, but the resolution in the sub-scanning direction cannot be improved
Solution Approach 1:
The light source is divided into multiple light emitting units arranged in the sub-scanning direction, and the optical detector is divided into multiple light receiving units arranged in the sub-scanning direction. Each light emitting unit corresponds to at least one light receiving unit, enabling simultaneous measurement at multiple sub-scanning positions, thereby improving resolution without proportionally increasing device complexity
Solution Approach 2:
The patent transitions from a single measurement point in the sub-scanning direction to multiple measurement points by arranging light emitting and receiving units in the sub-scanning direction. This dimensional expansion allows parallel measurement across multiple positions, improving resolution while maintaining efficient data acquisition
2Measurement precision
If multiple light emitting units and light receiving units are used to improve sub-scanning resolution, then the resolution improves, but the detection data obtaining time increases
Solution Approach 1:
Multiple light emitting units and corresponding light receiving units operate simultaneously to measure light intensity at multiple sub-scanning positions in parallel. This continuous parallel operation eliminates sequential measurement delays, improving resolution while maintaining fast data acquisition speed
Solution Approach 2:
By segmenting the light source and detector into multiple units that operate in parallel, the total measurement time is divided and executed simultaneously across different spatial positions, preventing time accumulation and maintaining efficient data acquisition
3Measurement precision
If multiple light emitting units and light receiving units are used to improve sub-scanning resolution, then the resolution improves, but the detection distance decreases
Solution Approach 1:
Multiple light receiving units simultaneously detect reflected light from the object at different sub-scanning positions, maintaining strong signal levels through parallel detection. This simultaneous multi-point detection improves resolution while preserving detection distance by avoiding sequential signal accumulation
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 configuration enables high-resolution distance data acquisition in the sub-scanning direction without prolonging data obtaining time or reducing detection distance, improving detection accuracy and range.
Implementation Method 1
receives light deflected by the deflector and reflected by an object
Implementation Method 2
a deflector which deflects light from the light source
Data Source
AI summary
An object detecting device includes: a light source which includes a plurality of light emitting units arranged in a sub-scanning direction; a deflector which deflects light from the light source; and an optical detector which includes a plurality of light receiving units arranged in the sub-scanning direction so as to correspond to the plurality of light emitting units, and receives light deflected by the deflector and reflected by an object.