Robot cleaner and method of controlling the same
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional robot cleaners experience deviations in the center of rotation when rotating in place, leading to ineffective cleaning of specific areas due to uneven floor surfaces or differences in mopping cloth moisture content, causing frictional forces to vary and resulting in the robot cleaner cleaning a different position than intended.
Innovation Solution
A robot cleaner design featuring a pair of rotation plates with different rotation speeds, where the plate farther from the origin of rotation rotates faster than the one closer to it, maintaining a shorter distance between the origin and the midpoint of the connection line between the plates, ensuring the robot cleaner stays centered and effectively cleans a specific area without deviating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the robot cleaner rotates in place using a pair of wet-mopping cloths, then it can clean a specific area intensively, but the center of rotation deviates from the origin due to uneven frictional forces
Solution Approach 1:
The control unit continuously monitors the actual position of the center of rotation during rotary traveling and compares it with the intended origin position. When deviation is detected, the system adjusts the rotation speeds of the left and right rotation plates to correct the position, ensuring the center remains at the origin for effective intensive cleaning of the target area.
Solution Approach 2:
The system dynamically changes the rotation speed parameters of the left and right rotation plates based on detected position deviation. By adjusting these speed parameters in real-time, the control unit compensates for uneven frictional forces and maintains accurate positioning at the rotation origin, resolving the contradiction between cleaning intensity and position precision.
2Measurement precision
If the robot cleaner uses different rotation speeds for left and right rotation plates, then it can maintain center position accuracy, but the control system becomes more complex
Solution Approach 1:
The control unit automatically adjusts the rotation speeds of the rotation plates based on position feedback without requiring external intervention or complex mechanical adjustment mechanisms. This self-regulating control system maintains position accuracy while keeping the overall system relatively simple by using electronic control rather than mechanical complexity.
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 prevents the center of rotation from deviating from the origin, allowing the robot cleaner to maintain a smaller radius of travel and intensively clean a particular point without leaving it, ensuring precise and effective cleaning.
Implementation Method 1
travels and cleaning the floor through a frictional force between the mopping cloth and the floor
Data Source
AI summary
Provided is a robot cleaner that includes a body having formed therein a space for accommodating a battery, a water container, and a motor, a pair of rotation plates that have coupled to lower sides thereof, mopping cloths facing a floor surface, and are rotatably disposed on a bottom surface of the body, and a virtual connection line connecting rotation axes of the pair of rotation plates to each other, in which a midpoint of the connection line moves while drawing a trajectory in a closed curve form on the floor surface in rotary traveling, thereby preventing a center of rotation of the robot cleaner from moving away from an origin of rotation.