Winding Shaft Force Sensing for Fault Detection in Sun Shades
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Solution Overview
Problem
Existing sun protection devices, such as venetian blinds and awnings, lack a reliable and efficient method to detect disturbances caused by wind forces or obstacles, which complicates the operation and maintenance of these systems.
Innovation Solution
A sensor is positioned between the mounting device and the winding shaft to directly detect forces generated by disturbances, allowing for the motor drive to be controlled based on these detected forces, thereby preventing malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensor is positioned between the mounting device and the winding shaft to detect forces, then the reliability of disturbance detection is improved, but the device complexity increases
Solution Approach 1:
A sensor is introduced as an intermediary element between the mounting device and the winding shaft to detect forces. This sensor acts as a mediator that translates mechanical forces into detectable signals, enabling reliable disturbance detection while maintaining a relatively simple overall device structure through the use of a single strategic sensing point.
2Measurement precision
If multiple sensors are used to detect forces in venetian blinds with tilting tapes, then the measurement precision is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts the essential detection function to a single critical location - the force between the mounting device and the winding shaft. By taking out only the most critical force measurement point, the system achieves sufficient measurement precision for safety operations without the complexity of multiple sensors distributed throughout the venetian blind structure.
3Reliability
If sensors are installed in tilting tapes to detect malfunctions, then the reliability of malfunction detection is improved, but the ease of manufacture decreases due to space requirements and sensor quantity
Solution Approach 1:
The invention merges the malfunction detection function with the existing structural connection between the mounting device and the winding shaft. By combining the force detection at this critical junction point with the malfunction detection requirement, the system achieves reliable malfunction detection without requiring separate sensor installations in space-constrained areas like tilting tapes.
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 provides a simple and versatile means to detect and respond to wind-related disturbances and obstacles, ensuring the sun protection device operates safely and efficiently.
Implementation Method 1
A sensor is positioned between the mounting device and the winding shaft to directly detect forces generated by disturbances
Data Source
Figure 1
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AI summary
The sun protection device (1) according to the invention comprises a mounting device (8), a winding shaft (6) rotatably mounted thereon, at least one cover element (4, 5, 14, 15), a motor drive (10), a control unit (11), and at least one sensor (18) that detects forces. The sensor (18) is arranged between a transmission device (17), which rests against a rotating bearing surface (16) that rotates with the winding shaft (6) but is not rotatable about the shaft axis, and a connection (20) from the at least one sensor (18) to the mounting device (8). Due to its arrangement, the sensor (18) detects forces acting between the winding shaft (6) and the mounting device (8) that can be attributed to disturbances caused by wind or obstacles.