Motorized Extensible Screen Aperture Control via Traction Force
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Solution Overview
Problem
Existing screen control systems, such as motorized Venetian screens and extensible elastic fabrics, face challenges in precisely varying light and air permeability due to the difficulty in modeling the incoming light and energy, requiring multiple sensors and manual adjustments, which result in suboptimal light and thermal comfort.
Innovation Solution
A motorized mechanism that adjusts the traction force on an extensible elastic screen based on setpoint signals from sensors, allowing for precise control of the aperture ratio, using a digital model to connect deformation or traction force to desired light and temperature conditions, and incorporating sensors for feedback and automation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a motorized mechanism is used to control the screen, then the light and air permeability can be precisely controlled, but the device complexity increases
Solution Approach 1:
The patent implements a feedback control system where sensors detect the actual aperture ratio or traction force and compare it with the setpoint value. The controller automatically adjusts the motorized mechanism to minimize the difference between actual and desired values, enabling precise control without requiring complex manual coordination of multiple sensors and actuators.
Solution Approach 2:
The system performs self-regulation by automatically adjusting the screen's traction force based on feedback from sensors and pre-established digital models. The controller autonomously determines the optimal aperture ratio to achieve desired light and thermal comfort conditions, eliminating the need for manual intervention and complex user coordination.
2Measurement precision
If multiple sensors are used to detect light and temperature, then the control accuracy improves, but the device complexity and cost increase
Solution Approach 1:
The patent employs sensors that serve multiple functions: detecting light intensity, temperature, and potentially other environmental parameters. The same sensor data is used by the controller to adjust the screen's aperture ratio for both visual comfort and thermal management, eliminating the need for separate sensor systems for different control objectives.
Solution Approach 2:
The system uses pre-established digital models that relate aperture ratio to light transmission and thermal properties. By changing the aperture ratio parameter, the system simultaneously achieves both light control and thermal comfort, reducing the need for multiple independent sensing and control systems.
3Device complexity
If manual adjustment is required to measure and apply traction force, then the device complexity is reduced, but the control precision and ease of operation deteriorate
Solution Approach 1:
The patent replaces manual mechanical adjustment with an automated motorized mechanism controlled by electronic sensors and a controller. Users simply interact with a simple interface (button, slider, or automated control) rather than manually measuring and applying traction force, dramatically improving ease of operation while maintaining system simplicity through automated control logic.
4Illumination intensity
If the aperture ratio is increased to allow more light, then the illumination intensity improves, but the thermal comfort deteriorates due to increased solar energy entry
Solution Approach 1:
The patent uses digital models that establish the relationship between aperture ratio, light transmission, and solar energy entry. The controller calculates the optimal aperture ratio that satisfies both illumination requirements and thermal comfort constraints, dynamically adjusting this parameter based on real-time sensor feedback and environmental conditions.
Solution Approach 2:
The system dynamically adjusts the aperture ratio in real-time based on changing environmental conditions (sun position, intensity, temperature). Rather than using fixed settings, the controller continuously optimizes the balance between light transmission and thermal gain, allowing the screen to adapt to varying conditions throughout the day.
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 fine-tuned control of light and air permeability, improving thermal comfort and solar protection by maintaining precise traction forces and aperture ratios, reducing manual intervention and enhancing the quality of light and energy management.
Implementation Method 1
an extensible elastic screen allowing more or less light and/or air to pass based on a traction to which it is subjected
Data Source
AI summary
In order to control the light or air permeability of an elastic extensible screen (1) disposed between an area to be protected and an external area, and having a permeability that varies with a pulling force exerted on the screen, a motorized mechanism (3) adjusts the pulling force on the screen in response to a setpoint signal, which can be determined on the basis of one or a plurality of signals from one or a plurality of sensors (12, 14, 15), in particular light sensors.