Magnetic Window Cleaning Units With Collision-Based Direction Reset
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Solution Overview
Problem
Windows, especially those on tall buildings, are difficult to clean safely due to their exterior surface being harder to access and posing risks during cleaning.
Innovation Solution
A window cleaning apparatus using magnetic forces to attach and move cleaning units on both surfaces of a window, equipped with direction detecting sensors, collision sensing, and offset adjustment mechanisms to ensure safe and efficient cleaning operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual cleaning of exterior window surfaces is performed, then cleaning can be done, but safety risks increase significantly especially on tall buildings
Solution Approach 1:
The patent replaces manual mechanical cleaning operations with an automated window cleaning apparatus that uses magnetic attraction forces. The cleaning units are equipped with motors that automatically move the cleaning elements across the window surfaces, eliminating the need for manual access to dangerous heights while maintaining effective cleaning capability.
Solution Approach 2:
The patent introduces a new dimensional approach by operating cleaning units on both the inner and outer surfaces of the window simultaneously. This dual-sided operation allows the system to clean exterior surfaces from both sides, eliminating the need for external access while achieving complete cleaning coverage through coordinated movement of multiple cleaning units.
2Productivity
If cleaning units move automatically on both window surfaces, then cleaning efficiency improves, but precise position control becomes difficult
Solution Approach 1:
The patent incorporates direction detecting sensors that continuously monitor the movement direction of cleaning units and provide feedback to the control system. When collision sensors detect contact with window frames, the system receives feedback about position deviations and automatically adjusts the movement to maintain precise positioning throughout the cleaning operation.
Solution Approach 2:
The control system pre-establishes movement paths and positions for the cleaning units before operation begins. The offset setting part pre-calculates and stores directional offsets for the sensors based on expected collision points with window frames, allowing the system to proactively compensate for position deviations before they occur during automatic movement.
3Measurement precision
If direction detecting sensors are used for automatic movement control, then positioning accuracy improves, but sensor offset errors accumulate causing navigation deviations
Solution Approach 1:
The patent converts the potentially harmful effect of sensor offset errors into a beneficial calibration mechanism. Collision sensors deliberately detect contacts with window frames, and these collision events are used by the offset setting part to automatically recalibrate and correct directional offsets, transforming navigation errors into opportunities for system self-correction and improved accuracy.
Solution Approach 2:
The system performs self-calibration of directional sensors using collision detection feedback. The offset setting part automatically adjusts sensor offsets based on collision sensor data without external intervention, allowing the system to self-correct positioning errors and maintain accurate navigation throughout operation.
4Reliability
If collision sensing is implemented for safety, then safety improves, but system complexity increases
Solution Approach 1:
The patent merges the collision sensing function with the existing movement control system. The collision sensors are integrated with the direction detecting sensors and control part, allowing both sensing functions to share common processing resources and control logic, thereby reducing overall system complexity while maintaining comprehensive safety monitoring.
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 apparatus allows for safe and efficient cleaning of both inner and outer window surfaces by controlling movement based on detected direction and resetting offsets upon collisions, improving safety and cleaning efficiency.
Implementation Method 1
a magnetic module to generate a magnetic attraction force; a first cleaning unit attached to an inner surface of a window by the magnetic attraction force; a second cleaning unit attached to an outer surface of the window by the magnetic attraction force
Data Source
AI summary
Provided are a window cleaning apparatus including first and second cleaning units which are respectively attached on both surfaces of a window using a magnetic force to move together with each other, and a method for controlling a movement of the window cleaning apparatus. The window cleaning apparatus includes a direction detecting sensor, a control part, a collision sensing part, and an offset setting part. The direction detecting sensor is provided to at least one of the first and second cleaning units to detect a moving direction of the window cleaning apparatus. The control part controls a movement of the window cleaning apparatus, based on the moving direction detected by the direction detecting sensor. The collision sensing part senses a shock to the window cleaning apparatus. The offset setting part sets a direction offset of the direction detecting sensor when the window cleaning apparatus collides with a frame of the window.