Touchless Faucet Control Using Multi-Axis Gesture Sensing
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Solution Overview
Problem
Faucets and similar plumbing fixtures often require physical interaction through knobs, levers, or buttons for controlling water flow, which can be cumbersome for users with limited dexterity or specific arrangements.
Innovation Solution
A touchless control system utilizing a control unit with pairs of sensors along orthogonal axes to detect gestures in multiple dimensions, adjusting water flow and temperature based on gesture velocity, enabling operation without physical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If physical knobs, levers, or buttons are used for controlling water flow, then the control mechanism is simple and reliable, but it requires physical touch which is cumbersome for users with limited dexterity
Solution Approach 1:
The patent replaces mechanical control elements (knobs, levers, buttons) with a touchless sensor-based control system. Sensors detect hand gestures and translate them into control signals for water flow and temperature, eliminating the need for physical contact while maintaining reliable control functionality.
Solution Approach 2:
The patent introduces sensors as an intermediary between the user's hand gestures and the plumbing fixture controls. The sensors detect gesture parameters (direction, velocity, duration) and convert them into control commands, serving as a mediator that translates physical gestures into operational changes without requiring direct mechanical interaction.
2Measurement precision
If multiple sensors are used to detect gestures in multiple dimensions, then gesture recognition accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent employs multiple sensors arranged in orthogonal pairs along different axes to detect gestures in three-dimensional space. By measuring hand movement along multiple dimensions (x, y, z axes) and combining these measurements, the system achieves comprehensive gesture recognition with high precision, capturing the full spatial complexity of user gestures.
3Adaptability or versatility
If touchless control is implemented, then user convenience is enhanced for diverse abilities, but the system requires complex sensor arrays and processing
Solution Approach 1:
The patent creates a universal control system that serves multiple user needs and abilities through a single touchless interface. The sensor array can detect various gesture types (wave, point, circle) and interpret them differently to control water flow, temperature, and other fixture functions, making the system adaptable to diverse user preferences and physical capabilities.
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
Enables seamless control of water flow and temperature through plumbing fixtures using gesture recognition, accommodating diverse user abilities and enhancing user convenience.
Implementation Method 1
at least one of the first pair of sensors or the second pair of sensors are time of flight (TOF) sensors
Implementation Method 2
at least one of the first pair of sensors or the second pair of sensors are infrared sensors
Data Source
AI summary
A control unit for a plumbing assembly includes a controller configured to determine a first velocity of a gesture along a first axis and a second velocity of the gesture along a second axis based on input from a plurality of sensors. The controller is configured to adjust an operational state of the plumbing assembly based on the first velocity and the second velocity.