Rotary Knob Angle Encoder for Car Wash Control Units
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Solution Overview
Problem
Existing car wash control units are costly to design and equip due to the need for customization based on varying wash programs and functions across different car washes, leading to high equipment costs.
Innovation Solution
A modular operating unit with a transparent housing, a manually operated rotary knob, an axis of rotation, an angle sensor, and magnetic locking units, allowing for adaptable and user-friendly selection of wash programs, with a display unit and LED backlighting for program indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control units are designed specifically for each car wash with customized wash programs, then the available wash programs and functions can be specifically developed for each car wash, but the equipment costs increase correspondingly high
Solution Approach 1:
The patent employs a universal control unit that can be used across multiple car wash installations. The control unit achieves versatility through software configuration rather than hardware customization, allowing the same physical device to adapt to different wash program requirements. This is implemented through a microcontroller that can be programmed with various wash profiles and parameters, eliminating the need to manufacture custom control units for each car wash while maintaining the ability to provide specifically tailored wash programs.
2Adaptability or versatility
If control units are customized for different car wash configurations, then specific wash programs can be implemented, but the design and equipping process becomes more complex and costly
Solution Approach 1:
The control unit is segmented into modular functional components that can be independently configured. The system divides wash program customization into separate parameter sets (water flow, temperature, brush speed, timing) that can be individually adjusted through software without affecting the overall hardware architecture. This modular approach allows complex wash programs to be built from simple, standardized building blocks, reducing design complexity while maintaining versatility.
Solution Approach 2:
The patent implements versatility through parameter changes rather than structural modifications. The control unit stores multiple wash programs as sets of adjustable parameters (duration, intensity, sequence) that can be selected and modified through the user interface. This allows the same hardware to adapt to different car wash configurations by changing software parameters, significantly reducing device complexity compared to hardware customization.
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 robust, reliable, and cost-effective selection of wash programs, adaptable to different car wash configurations, while providing user-friendly operation and flexible programming.
Implementation Method 1
an angle sensor is operatively connected to the axis of rotation for determining an absolute angle of the rotary knob, and that the selected positions can be detected with the angle sensor
Implementation Method 2
the selection positions can be predefined by mechanical and/or magnetic locking units
Implementation Method 3
the transparent outer wall being backlit with a light source, the light source preferably consisting of an LED strip arranged in an edge region of the transparent outer wall
Data Source
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AI summary
An operating unit (1) is specified, comprising a housing (4) with at least one transparent outer wall (5) and a rotary knob (6) which can be manually operated from outside the housing (4) and is rotatable to predefinable selection positions. The operating unit (1) according to the invention is characterized in that a rotary axis is provided in the housing (4) and extends through the transparent outer wall (5), the rotary knob (6) is attached to the outer end of which an angle encoder is operatively connected to the rotary axis for determining an absolute angle of the rotary knob (6), and the selection positions can be detected with the angle encoder.