Collision detection apparatus and cleaning device
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Solution Overview
Problem
Existing collision detection systems in sweeping robots are complex and require improvement for enhanced sensitivity and efficiency in obstacle avoidance.
Innovation Solution
A collision detection apparatus comprising a base, a switch, an elastic assembly, and a movably connected cover with an abutting part that triggers the switch upon collision, allowing for precise reporting of collision events to the robot's processor for obstacle avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex collision detection structures are used, then collision detection capability is improved, but device complexity increases
Solution Approach 1:
The collision detection apparatus is divided into distinct functional modules: a movable cover that contacts obstacles, an elastic assembly that converts mechanical force, and a switch that generates electrical signals. This segmentation allows each component to perform its specific function efficiently while keeping the overall structure manageable and understandable.
Solution Approach 2:
The elastic assembly serves as an intermediary between the cover and the switch. It converts the mechanical collision force into a controlled mechanical displacement that reliably triggers the switch, while also providing buffering and protection. This intermediary mechanism simplifies the overall detection system by decoupling the direct mechanical contact from the electrical signal generation.
2Stability of the object's composition
If the cover is rigidly connected to the base, then structural stability is improved, but collision detection sensitivity decreases
Solution Approach 1:
The cover is designed with movable connections to the base, allowing it to dynamically respond to collision forces. The elastic assembly further enhances this dynamic response by deformable connection, enabling the system to adapt its stiffness based on the collision intensity. This dynamic design maintains structural stability during normal operation while achieving high sensitivity during collision events.
Solution Approach 2:
The elastic assembly changes the mechanical parameters (stiffness, force distribution) based on the collision conditions. During normal operation, the system maintains stable structural parameters, but during collision, the elastic assembly modifies these parameters to amplify the detection signal, thereby achieving both stability and sensitivity.
3Reliability
If the LDS is positioned at the highest position, then navigation capability is improved, but the ability to enter low space deteriorates
Solution Approach 1:
The collision detection function is segmented into a separate cover structure that can be positioned at the front or lower parts of the robot, independent of the LDS position. This allows the LDS to remain at the optimal high position for navigation while the collision detection cover extends to lower positions for entering tight spaces, resolving the height conflict through functional segmentation.
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
The solution provides a simple yet effective collision detection mechanism with high sensitivity and efficiency, enabling the sweeping robot to accurately detect and avoid obstacles while protecting the laser distance sensor and improving aesthetics.
Implementation Method 1
an elastic assembly, disposed in the base, where one end of the elastic assembly is connected with the base, and the other end is connected with the switch
Data Source
AI summary
A collision detection apparatus includes: a base; a switch in the base; an elastic assembly disposed in the base, in which one end of the elastic assembly is connected with the base, and the other end is connected with the switch; and a cover, one side of which is movably connected with the base to move within a set range and is provided with an abutting part, in which the abutting part is clamped with a preset portion of the elastic assembly; under a state that the cover has a collision and moves in a set direction, the abutting part is forced to push the preset portion, so as to drive the other end of the elastic assembly to trigger the switch, and the switch is configured to report a collision event when being triggered.