Method for determining an open state of an openable panel of a room of a building and associated determining device
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Solution Overview
Problem
Existing methods for determining the opening state of a room's openings, such as windows or doors, are inaccurate and economically unfeasible, especially when temperatures inside and outside the room are equal or slightly different, making it difficult to manage energy consumption effectively.
Innovation Solution
A method using temperature and humidity sensors to calculate absolute humidity and analyze its temporal variations, with thresholds for determining the opening state, allowing for precise detection of open or closed states and enabling control of home automation devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If temperature-based methods are used to detect opening state, then detection can be implemented without dedicated sensors, but detection accuracy deteriorates when indoor and outdoor temperatures are equal or similar
Solution Approach 1:
The patent changes the detection parameter from temperature to absolute humidity. By measuring humidity instead of temperature, the system maintains high detection accuracy regardless of temperature conditions. The control device calculates absolute humidity from relative humidity and temperature measurements, then detects opening state based on humidity variation rates, thereby resolving the accuracy problem when temperatures are similar.
2Measurement precision
If dedicated opening sensors are installed on each window or door, then opening state detection accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes existing temperature and humidity sensors serve multiple functions. These sensors, originally intended for comfort control, are now also used for opening state detection. By analyzing the temporal variation of absolute humidity from these multi-purpose sensors, the system achieves accurate opening detection without requiring additional dedicated sensors, thus reducing device complexity while maintaining precision.
3Use of energy by stationary object
If temperature difference-based detection is used, then energy management can be simplified, but detection reliability deteriorates when no temperature difference exists between inside and outside
Solution Approach 1:
The patent switches from temperature difference as the detection basis to absolute humidity variation rate. This parameter change ensures reliable detection regardless of temperature conditions. The system calculates absolute humidity from sensor data and detects openings by monitoring its temporal changes, maintaining high reliability even when indoor and outdoor temperatures are equal, thus solving the reliability problem while keeping energy management efficient.
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 approach provides a simple, reliable, and precise method for determining the opening state, improving energy management by accurately distinguishing between open and closed states, regardless of temperature differences, and optimizing air renewal rates.
Implementation Method 1
a step of measuring by the humidity sensor the relative humidity of the air inside the room
Implementation Method 2
a step of measuring by the temperature sensor the temperature of the air inside the room
Implementation Method 3
a step of determining, in particular a calculation step, the absolute humidity of the air inside the room from the relative humidity of the air inside the room and the temperature of the air inside the room
Data Source
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Figure 3
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AI summary
Method for determining an opening state of an opening of a room of a building, the room being equipped with the opening, a temperature sensor and a humidity sensor, the method comprising : - a step of measurement by the humidity sensor of the relative humidity of the air inside the room and of measurement by the temperature sensor of the temperature of the air inside the room; - a step of determining, in particular a step of calculating, the absolute humidity of the air inside the room from the relative humidity rate of the air inside the room and the temperature of the air inside the room; - a step of analysis of the temporal evolutions of the interior absolute humidity; and - a step of using the results of the analysis step to determine the opening state of the leaf.