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Solution Overview
Problem
Existing soil cultivation devices face challenges in reliably determining the type of soil using detection devices, particularly due to high technical effort and equipment requirements for optical measuring devices, and the need for optimal measurement conditions, which limits their effectiveness.
Innovation Solution
An automatically movable soil cultivation device employs a frictional resistance element asymmetrically arranged relative to its wheels, causing a force imbalance that results in a speed difference when transitioning between different soil types, allowing for soil type identification based on the resulting drift and speed comparison.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical measuring devices are used to detect soil type, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex optical measuring devices with a mechanical detection approach. A friction element contacts the floor surface and experiences different frictional forces depending on the floor type (carpet vs. hard floor). This mechanical friction-based detection substitutes the need for cameras and image processing systems, significantly reducing device complexity while maintaining soil type detection capability.
2Measurement precision
If optical measuring devices are used to detect soil type, then measurement precision is improved, but ease of operation worsens due to lighting requirements
Solution Approach 1:
The mechanical friction-based detection system operates independently of ambient lighting conditions. The friction element experiences force based purely on the mechanical interaction with the floor surface, eliminating the need for controlled lighting environments required by optical systems. This makes the detection device easier to operate across various lighting conditions.
3Productivity
If frictional resistance element is arranged asymmetrically, then productivity is improved through simpler detection, but measurement precision may worsen due to drift effects
Solution Approach 1:
The friction element is deliberately arranged asymmetrically relative to the device's centerline, creating an offset that generates a drift force when friction occurs. This asymmetry is intentional and useful: the resulting drift causes the device to naturally pivot or adjust its orientation, which can be detected and used to infer floor type. The asymmetric design simplifies the detection mechanism while providing measurable effects for soil type identification.
Solution Approach 2:
The system uses feedback from the drift caused by asymmetric friction to determine floor type. Sensors detect the directional drift or orientation changes resulting from the asymmetric friction force, and this feedback information is processed to identify whether the device is on carpet or hard floor. The feedback mechanism transforms the potential precision issue into a useful detection signal.
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
This solution enables reliable soil type identification without the need for complex optical systems, allowing for adaptive processing adjustments, such as adjusting fan power or cleaning methods based on detected soil types, improving operational efficiency and effectiveness.
Implementation Method 1
the frictional resistance element is in contact with the surface during normal operation of the soil cultivation device, i.e. during cultivation of a surface. Thus, due to the frictional resistance, the frictional resistance element is subject to an application of force
Data Source
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AI summary
The invention relates to an automatically movable soil treatment device (1), in particular a cleaning robot, with a soil treatment element (2), at least two motor-driven wheels (3, 4) and a detection device for identifying the type of soil on a surface to be treated. In order to achieve optimum recognition of the soil type in a simple manner, it is proposed that the detection device has a frictional resistance element (6) which contacts the surface during movement in such a way that a force resulting outside of a reference axis (7) on the soil cultivation implement (1st ) acts, the reference axis (7) being oriented parallel to a main direction of movement (8) of the soil cultivation implement (1), which is predetermined by the orientation of the wheels (3, 4), and in relation to a direction perpendicular to the reference axis (7) in the middle between the wheels (3, 4) is aligned. Furthermore, a method for operating an automatically movable soil treatment device (1) is proposed.