Robot Cleaner Dust Sensing for Autonomous Dust Box Emptying
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Solution Overview
Problem
Robot cleaners face performance degradation due to dust accumulation, which affects their cleaning efficiency and requires manual intervention for maintenance, leading to inefficiencies and increased operational costs.
Innovation Solution
A cleaning system comprising a robot cleaner with a dust box and a maintenance station that uses air circulation and a brush unit with rotating rollers to effectively discharge dust, and a dust sensing unit to automate the dust removal process, ensuring continuous cleaning performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a robot cleaner operates autonomously for extended periods, then productivity increases, but dust accumulation in the dust box degrades cleaning performance
Solution Approach 1:
The maintenance station enables the robot cleaner to automatically empty its own dust box without human intervention. The system uses a pump unit to generate air circulation that draws dust from the robot's dust box through a suction duct, and a rotating brush unit to agitate and discharge accumulated dust, allowing the robot to maintain cleaning performance autonomously
Solution Approach 2:
The maintenance station performs dust discharge operations in advance before the dust box becomes completely full. The dust sensing unit detects dust accumulation levels and triggers automatic dust discharge when thresholds are reached, preventing performance degradation before it occurs
2Reliability
If manual dust removal is required frequently, then cleaning performance is maintained, but loss of time and operational efficiency decrease
Solution Approach 1:
The system automates the entire dust removal process through the maintenance station, which autonomously detects when dust discharge is needed via the dust sensing unit and executes the discharge operation using the pump unit and brush unit, completely eliminating the need for manual dust box emptying
Solution Approach 2:
The dust sensing unit continuously monitors dust accumulation in the dust box and provides feedback to the control unit, which automatically initiates dust discharge operations when predetermined thresholds are reached, creating a closed-loop system that maintains optimal performance without user intervention
3Productivity
If the brush unit rotates rapidly to discharge heavy dust, then dust removal efficiency increases, but energy consumption increases
Solution Approach 1:
The brush unit's rotation speed is dynamically adjusted based on real-time feedback from the dust sensing unit. The control unit varies the rotation speed according to the type and amount of dust detected, using higher speeds for heavy dust particles that require more agitation and lower speeds for lighter dust, thereby optimizing energy consumption while maintaining effective dust discharge
Solution Approach 2:
The system changes the operational parameters of the brush unit based on dust characteristics. The control unit modifies rotation speed as a variable parameter in response to dust sensing data, adapting the mechanical energy input to match the actual dust discharge requirements rather than operating at constant high speed
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 system maintains the cleaning performance of the robot cleaner by automatically discharging dust, reducing manual intervention, and optimizing energy and material usage through air circulation, thereby enhancing operational efficiency and reducing maintenance costs.
Implementation Method 1
a dust sensing unit including a light emitting unit to transmit light and a light receiving sensor to sense the light transmitted by the light emitting unit
Implementation Method 2
the dust swept into the dust box is suspended in air introduced into the dust box through the opening of the body, and is then discharged through the opening of the body
Implementation Method 3
The air may be introduced into the dust body through a side region of the opening of the body, and may then be outwardly discharged through a central region of the opening of the body
Data Source
AI summary
A robot cleaner includes a body; a driving unit; at least one sensor configured to detect an obstacle; a cleaning unit, the cleaning unit including a brush unit and a fan unit; a dust box to store dust inside of the dust box, the dust box being detachably mounted to the body; and a dust sensing unit including a light emitting unit to transmit light and a light receiving sensor to sense the light transmitted by the light emitting unit, the light emitting unit and the light receiving sensor being fixed on the body and outside of the dust box, and the light emitting unit being configured to transmit light through the inside of the dust box. The driving unit, the at least one sensor, the cleaning unit, the dust box, and the dust sensing unit are positioned on or in the body of the robot cleaner.