Electrochromic Glass Feedback Control for Precise Transmittance
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Solution Overview
Problem
Existing methods for adjusting the transmittance of electrochromic glass in buildings are inaccurate and require manual user intervention, leading to poor user experience.
Innovation Solution
A method for controlling electrochromic glass using a processor module that generates adjustment instructions based on second illuminance of ambient light passing through the electrochromic layer, with sensors on either side to detect light intensity and adjust transmittance automatically, including feedback mechanisms to ensure accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a photosensor is mounted on an outer wall to detect solar luminous intensity and adjust transmittance, then the electrochromic glass can automatically adjust transmittance, but the adjustment accuracy is insufficient and cannot reach expected target
Solution Approach 1:
The patent introduces a feedback mechanism where a second photosensor is placed inside the building to detect the actual illuminance after light passes through the electrochromic glass. The processor module continuously compares the detected illuminance with the target illuminance and adjusts the transmittance accordingly. This closed-loop feedback system ensures that the transmittance adjustment accurately reaches the expected target by making real-time corrections based on actual conditions.
Solution Approach 2:
The patent replaces the conventional open-loop control system with an intelligent feedback control system. Instead of simply reacting to external light conditions, the system now actively monitors the actual indoor illuminance and dynamically adjusts the electrochromic glass transmittance to achieve precise control. This substitution of control mechanism fundamentally improves adjustment accuracy.
2Ease of operation
If transmittance adjustment methods are simplified for ease of use, then user operation becomes easier, but the adjustment result cannot accurately meet user expectations
Solution Approach 1:
The patent implements a self-service control system where the electrochromic glass automatically adjusts its own transmittance based on feedback from the indoor photosensor. The system independently monitors the actual illuminance conditions and makes precise adjustments without requiring complex user intervention. This self-regulating mechanism maintains ease of operation while achieving accurate transmittance control that meets user expectations.
3Measurement precision
If manual intervention is required for transmittance adjustment, then adjustment accuracy can be improved, but user experience deteriorates due to poor automation
Solution Approach 1:
The patent employs a closed-loop feedback control system that automatically achieves precise transmittance adjustment without manual intervention. The second photosensor inside the building provides real-time feedback on actual illuminance levels, and the processor module automatically calculates and applies the necessary adjustments to reach the target illuminance. This automated feedback mechanism delivers both high precision and excellent user experience.
Solution Approach 2:
The patent replaces manual adjustment mechanisms with an intelligent automated control system. The system uses photosensors and a processor module to automatically monitor and adjust transmittance based on actual indoor lighting conditions. This substitution eliminates the need for manual intervention while maintaining or improving adjustment accuracy, thereby significantly enhancing user experience.
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
Accurately adjusts transmittance to meet user expectations, reducing glare, energy consumption, and extending the electrochromic device's lifespan by automating the process.
Implementation Method 1
The second sensor is configured to convert an optical signal to an electrical signal and send the electrical signal to the processor module
Implementation Method 2
The electrochromic material can undergo a stable and reversible oxidation-reduction reaction under the action of an applied electric field so that optical properties (transmittance, reflectance and absorptance) of the material change
Data Source
AI summary
A method for controlling an electrochromic glass and an electrochromic glass. The electrochromic glass includes a second sensor, a processor module and an electrochromic layer. The second sensor is configured to convert an optical signal to an electrical signal and send the electrical signal to the processor module (13). The second sensor is disposed on a side of the electrochromic layer facing away from the incidence of ambient light, and a light-sensing surface of the second sensor faces in a direction toward the incidence of the ambient light. The method includes: generating an adjustment instruction based on a second illuminance of ambient light passing through an electrochromic layer, where the adjustment instruction carries a control signal; and transmitting the adjustment instruction to the electrochromic layer so that transmittance of the electrochromic layer is adjusted according to the control signal, thus controlling transmittance of electrochromic glass.