Motorised Roller Shutter Intrusion Detection via Coaxial Tube Rotation
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Solution Overview
Problem
Existing motorized shutter devices with intrusion detection systems require expensive linear sensors and cannot achieve complete closure without allowing light passage, making them inefficient for sealing applications.
Innovation Solution
A motorized shutter device with a coaxial motor tube and winding tube system that uses detection means such as gyroscopes or accelerometers to detect rotations of the motor tube, allowing for complete closure and intrusion detection without reassembling the apron, thereby eliminating gaps and ensuring total sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a linear sensor is installed to detect attempted intrusion, then intrusion detection capability is improved, but device cost increases
Solution Approach 1:
The patent replaces the mechanical/optical linear sensor system with an inertial detection system using accelerometers and gyroscopes. These sensors detect attempted intrusion by measuring abnormal acceleration patterns and rotational movements of the shutter curtain, eliminating the need for expensive linear sensors while maintaining intrusion detection capability.
Solution Approach 2:
The patent uses relatively inexpensive accelerometers and gyroscopes instead of costly linear sensors. These inertial sensors provide a cost-effective alternative that maintains detection functionality while significantly reducing device manufacturing cost.
2Reliability
If the curtain is raised to enable detection, then intrusion detection is possible, but complete closure and sealing are compromised
Solution Approach 1:
The patent performs preliminary detection of intrusion attempts by monitoring acceleration and rotation during the curtain lowering process itself, before the curtain reaches its fully closed position. This allows intrusion detection to occur while the curtain remains in a sealed configuration, eliminating the need to raise the curtain for detection purposes.
Solution Approach 2:
The patent replaces the mechanical approach of raising the curtain for detection with an inertial sensing system that detects intrusion attempts through abnormal movement patterns during normal operation, allowing the curtain to remain fully closed and sealed.
3Reliability
If the apron is reassembled to detect intrusion, then detection capability is improved, but device complexity and operation difficulty increase
Solution Approach 1:
The patent enables the shutter system to continuously monitor for intrusion attempts automatically during normal lowering operation without requiring manual reassembly or configuration of detection components. The accelerometers and gyroscopes autonomously detect abnormal movements and trigger alerts, eliminating complex manual setup procedures.
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 effective intrusion detection and complete closure of the shutter without reassembling the apron, preventing light passage and reducing costs associated with linear sensors, thus providing a more efficient and secure sealing solution.
Implementation Method 1
detection means for detecting a rotation of the motor tube
Implementation Method 2
detection means such as gyroscopes or accelerometers to detect rotations of the motor tube
Data Source
Figure 1~2
Figure 3
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AI summary
The invention relates to a motorised closing device (200) for closing a bay, comprising an apron (106), driving means (102) for driving the apron up and down, the driving means comprising a tube (104) for winding the apron and a coaxial motor tube (103), the motor tube being mounted such that it rotates about its axis, the rotation being possible between a first position and a second position, detection means (213) allowing a rotation of the motor tube (103) to be detected, control means (112) for generating a message representing an attempt to open the apron when the detection means detect a rotation of the motor tube, and communication means (120) for transmitting the generated message to a security centre (150), the motorised closing device being suitable for implementing the steps of a method for detecting an attempt to open the apron, three of these steps being to detect (315), by the detection means, a first rotation of the motor tube, then to stop (320) the lowering of the apron (106) so that the motor tube (103) stops in an intermediate position between the first position and the second position, and finally to detect (325), by the detection means, a second rotation of the motor tube.