Pressure-Sensing Door Control for Airtight Room Sealing

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Solution Overview

Problem

Existing doors to sealed rooms often fail to maintain airtightness due to worn seals or pressure imbalances, making it difficult to predict when maintenance is needed and ensuring proper sealing.

Innovation Solution

A door operation management system using sensors to measure internal and external air pressures, generating control signals to adjust door operation, and predicting maintenance needs based on pressure differences and usage history.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional door sealing systems are used, then the door structure remains simple, but the reliability of maintaining airtightness deteriorates due to worn seals and pressure imbalances

Engineering Contradiction:
Improvedoor sealing reliabilityVSAvoiddoor control system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The system continuously monitors air pressure differences across the door and provides feedback to the control unit. When the pressure difference exceeds predefined thresholds, the system automatically generates control signals to adjust door operation or alert users, ensuring reliable sealing without requiring complex manual intervention systems

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The door control system automatically monitors sealing conditions through integrated sensors and adjusts door operation autonomously based on pressure differential data. The system self-regulates by generating control signals when sealing issues are detected, reducing the need for external maintenance intervention while maintaining reliable sealing

Inventive Principle:
Principle #25Self-service

2Reliability

If manual monitoring of door sealing is used, then the system complexity is low, but the ability to predict maintenance needs deteriorates

Engineering Contradiction:
Improvemaintenance prediction capabilityVSAvoidmonitoring system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

Sensors continuously measure air pressure differences and feed this data to the control unit, which analyzes trends to predict when sealing components will fail. The system provides early warning feedback before actual failure occurs, enabling proactive maintenance scheduling

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system performs preliminary analysis of pressure differential trends and generates maintenance alerts before sealing failures actually occur. By predicting future sealing degradation based on current data patterns, the system enables planned maintenance actions that prevent failures before they impact room sealing

Inventive Principle:
Principle #10Preliminary action

3Reliability

If no automated control is implemented, then the system remains simple, but the ability to ensure proper sealing under varying conditions deteriorates

Engineering Contradiction:
Improvedoor sealing functionVSAvoiddoor operation automation
Core Design Contradiction:
ReliabilityVSExtent of automation

Solution Approach 1:

The system uses pressure differential sensors to continuously monitor sealing conditions and automatically adjusts door operation based on real-time feedback. When pressure differences indicate sealing degradation, the control unit generates signals to reinforce door sealing or alert users, ensuring reliable sealing function

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The door control system autonomously monitors sealing performance and self-regulates door operation based on pressure differential data. The system automatically generates control signals to maintain sealing integrity without requiring external automation systems, achieving reliable sealing with minimal automated intervention

Inventive Principle:
Principle #25Self-service

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

Ensures reliable door sealing by automatically adjusting operations and predicting maintenance, enhancing airtightness and user experience while optimizing energy use.

Implementation Method 1

at least a first sensor device configured to obtain at least a first air pressure data based on the air pressure on the inside of a door and at least a second air pressure data based on the air pressure on the outside of the door

Methodology Applied
Scientific EffectAir pressure measurement:

Data Source

PatentUS12499716B2System and method for controlling the operation of a door
Publication Date: 2025.12.16 ASSA ABLOY ENTRANCE SYST AB
  • US12499716B2 patent drawing
  • US12499716B2 patent drawing
  • US12499716B2 patent drawing

AI summary

A system, method and computer program product for controlling the operation of a door (1) to a room, the method comprising (S1) obtaining at least a first air pressure data (1ap) based on an air pressure on the inside of the door (1), (S2) obtaining at least a second air pressure data (2ap) based on the air pressure on the outside of the door (1), and (S5) determining at least a first air pressure difference data (1apdd) based on the difference between the at least first air pressure data (1ap) and the at least second air pressure data (2ap), and in a determination that the at least first air pressure difference data (1apdd) is outside of a predefined value, or a predefined value interval, generate a control signal (CS) for controlling the operation of the door (1).