Magnetic Rotary Control Knob for Spark-Free Load Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing control devices for electrical appliances lack a simple and reliable method to select and control electrical loads without direct electrical connections, especially in potentially explosive environments, and often require mechanical fastening or complex sensor arrangements.
Innovation Solution
A control device with a transmitter unit and receiver unit separated by a plate, utilizing a first ring magnet and sensors to detect flux changes for inclination direction and amount, allowing for load selection and control without direct electrical connections, and using flux concentrators to enhance magnetic flux detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a direct electrical connection is used to control electrical loads, then control reliability is improved, but safety in potentially explosive environments deteriorates
Solution Approach 1:
The patent replaces direct electrical connections with a magnetic field-based communication system. The transmitter unit generates magnetic flux that passes through the plate to the receiver unit, enabling control signals to be transmitted without electrical contact. This substitution eliminates the risk of electrical sparks in potentially explosive environments while maintaining reliable control functionality.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary medium to transmit control signals between the transmitter and receiver units. The magnetic flux serves as the mediator that carries information across the plate barrier, allowing control functions to be performed without direct electrical connection and thus preventing ignition hazards in explosive atmospheres.
2Stability of the object's composition
If mechanical fastening is used to secure the transmitter unit, then positioning stability is improved, but ease of removal deteriorates
Solution Approach 1:
The patent replaces mechanical fastening systems with a magnetic positioning system. Magnets in the transmitter unit interact with corresponding magnets or magnetizable material in the plate, creating a magnetic holding force that secures the transmitter unit in position. This allows the unit to be firmly positioned during operation while enabling tool-free removal by overcoming the magnetic force, thus improving both stability and ease of removal.
3Measurement precision
If multiple sensors are arranged densely to detect inclination accurately, then measurement precision is improved, but device complexity deteriorates
Solution Approach 1:
The patent divides the sensor arrangement into two distinct regions: a center region with a first type of sensor and an annular outer region with a second type of sensor. This segmentation allows each sensor type to be optimized for specific detection tasks, achieving accurate inclination measurement through coordinated operation of distributed sensors rather than requiring a dense array of identical sensors, thus reducing overall system 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
Enables simple and reliable selection and control of electrical loads, even in explosive environments, with the ability to operate without mechanical fastening and using non-magnetic materials, while providing precise detection of inclination and rotation through magnetic flux changes.
Implementation Method 1
the flux change caused by an inclination of the first ring magnet can be detected in a simple and reliable way with a small number of sensors
Implementation Method 2
a restoring force for assuming the rest position acts on the transmitter unit by means of a second magnet or a second magnetizable element
Data Source
AI summary
A control device is provided that includes a plate and a control unit. The control unit has a rotary unit designed as a transmitter unit and a receiver unit. The transmitter unit has a top surface and a bottom side, wherein a base is formed on the bottom side in a center region and a first magnetizable element or a first magnet for positioning the transmitter unit at a predefined position over the receiver unit is arranged in the center region. In a rest position the transmitter unit rests with the base on the plate and the axis of rotation extends essentially parallel to the normal of the plate, or the transmitter unit is tilted into an operating position such that the base rests only partially on the plate and the axis of rotation is tilted relative to the normal of the plate.