Dual Depth Camera Module Blind Spot Elimination
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Solution Overview
Problem
Conventional dual depth camera modules suffer from blind spots due to limitations in angle of view and minimum effective distance, which can lead to missed object detection, especially when objects suddenly appear within the camera's range.
Innovation Solution
The dual depth camera module is designed with the first and second depth cameras positioned at specific angles relative to each other and the ground, allowing them to face each other and cover areas opposite their mounting sides, effectively increasing the field of view to almost 180° and addressing blind spots by imaging areas that would otherwise be inaccessible.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two depth cameras are linearly disposed to improve accuracy of distance maps, then measurement precision is improved, but blind spots are generated due to minimum effective distance
Solution Approach 1:
The patent transitions from linear arrangement (1D) to angular/intersecting arrangement (2D spatial configuration). By positioning cameras at angles to each other rather than in a straight line, the system creates overlapping fields of view that eliminate blind spots while maintaining measurement precision through multi-angle depth mapping.
Solution Approach 2:
The patent employs asymmetric positioning of the two depth cameras, where cameras are placed at different angular orientations rather than symmetric linear positions. This asymmetric configuration allows each camera to cover different spatial zones, with their combined fields of view eliminating blind spots that would exist in symmetric linear arrangements.
2Area of moving object
If two depth cameras are intersected to have different viewpoints to overcome limitation in angle of view, then angle of view is improved, but blind spots cannot be coped with due to minimum effective distance
Solution Approach 1:
The patent extends the coverage from simple angular viewing to three-dimensional spatial coverage by positioning cameras at specific angles and heights. This dimensional approach allows the intersecting camera views to create overlapping detection zones that eliminate blind spots in the space between cameras, not just expand the horizontal angle of view.
Solution Approach 2:
The patent pre-configures the camera positions and angles during system design to anticipate and eliminate blind spots before they occur. By carefully selecting the angular separation and positioning of cameras, the system proactively ensures complete coverage of the detection area, preventing blind spots from forming in the first place.
3Reliability
If cameras are positioned to face each other at specific angles, then blind spots are eliminated and coverage is improved, but device complexity increases
Solution Approach 1:
The patent uses angular positioning in the horizontal plane and vertical inclination to achieve blind spot elimination. By utilizing both horizontal angular separation and vertical angle adjustments, the system creates comprehensive coverage with relatively simple camera mounting structures, avoiding the need for complex mechanical positioning systems.
Solution Approach 2:
The patent optimizes specific parameters such as the angle between cameras, the height difference between camera positions, and the inclination angles of each camera. By carefully selecting these geometric parameters, the system achieves complete coverage while maintaining a simple and compact device structure that does not require complex adjustment mechanisms.
Data Source
AI summary
A dual depth camera module provided in a mobile robot is provided. In the dual depth camera module, a first depth camera and a second depth camera each have a turned shape at a first angle to face each other with respect to an extending line in a proceeding direction of a mobile robot, and the first depth camera and the second depth camera each have an inclined shape at a second angle to face each other in a direction opposite a surface of the ground with respect to a vertical extending line in the proceeding direction of the mobile robot.