Optical Scanning Object Detection Device With Rotating Mirror
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Solution Overview
Problem
Existing object detection systems face challenges in achieving a wide detection area with high resolution and low cost, particularly in providing effective detection over 180° while maintaining a simple configuration and avoiding noise and complexity associated with multiple light sources and receiving elements.
Innovation Solution
The optical scanning type object detection device employs two light emitting/receiving units and a rotating mirror unit with slanted reflection planes, allowing for a wide detection area exceeding 180° by scanning laser beams across multiple reflection planes, enabling effective detection with a relatively simple and cost-effective configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple light sources and light receiving elements are arranged to increase scan lines and detection range, then detection coverage is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent combines light emitting and light receiving functions into integrated units, where each unit contains both a light source and light receiving elements. This merging reduces the total number of separate components needed while maintaining comprehensive detection coverage through the rotating mirror system.
Solution Approach 2:
The patent employs a rotating mirror unit that dynamically changes the scanning direction and coverage area. By rotating the mirror, a single light emitting/receiving unit can cover multiple scan lines and a wide detection area exceeding 180°, eliminating the need for multiple static units.
2Area of stationary object
If multiple light sources and light receiving elements are arranged to increase scan lines and detection range, then detection coverage is improved, but cost increases significantly
Solution Approach 1:
The patent combines light emitting and light receiving functions into integrated units, where each unit contains both a light source and light receiving elements. This merging reduces the total number of separate components needed while maintaining comprehensive detection coverage through the rotating mirror system.
Solution Approach 2:
The patent employs a rotating mirror unit that dynamically changes the scanning direction and coverage area. By rotating the mirror, a single light emitting/receiving unit can cover multiple scan lines and a wide detection area exceeding 180°, eliminating the need for multiple static units.
3Measurement precision
If contact type rotary connectors are used to power and control multiple light sources and light receiving elements, then detection capability is improved, but noise generation and configuration complexity increase
Solution Approach 1:
The patent extracts the power supply and control connections from the rotating scanning unit and relocates them to the stationary housing. The rotating mirror unit and light emitting/receiving units operate wirelessly or through contactless interfaces, eliminating noisy mechanical connectors from the rotating assembly.
Solution Approach 2:
The patent replaces mechanical rotary connectors with non-contact power and data transmission methods. This substitution eliminates the noise and reliability issues associated with sliding contacts while maintaining the ability to power and control the rotating scanning 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
This solution allows for accurate object detection over a wide area of 360° with improved resolution and reduced complexity, enhancing detection efficiency and cost-effectiveness by using a dual light emitting/receiving unit setup with strategically aligned reflection planes.
Implementation Method 1
a beam flux emitted from the light source is reflected on the mirror unit and is scanned according to rotation of the mirror unit
Implementation Method 2
a portion of a beam flux scattered by an object in the beam flux emitted from the light source is reflected on the mirror unit and, after that, is received by the light receiving portion
Implementation Method 3
the beam flux emitted from the light source is reflected on the mirror unit and is scanned according to rotation of the mirror unit
Data Source
AI summary
An object detection device includes a first optical transceiver that generates a first beam flux and receives a scattered portion of the first beam flux, a second optical transceiver that generates a second beam flux and receives a scattered portion of the second beam flux, and a mirror unit that rotates around a rotation axis. The first beam flux is reflected by the mirror unit and is scanned based on the rotation of the mirror unit, and the scattered portion of the first beam flux is generated by scattering of the first beam flux by an object. The scattered portion of the first beam flux is reflected by the mirror unit before being received by a light receiving portion of the first optical transceiver, and the second beam flux is reflected by the mirror unit and is scanned based on the rotation of the mirror unit.