Window Security Alarm System with Threshold Distance Detection

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Solution Overview

Problem

Existing security alarm systems for windows and doors lack effective methods to detect unauthorized opening while allowing for ventilation, as they often trigger alarms when the window or door is partially opened, which is undesirable.

Innovation Solution

A security alarm system that uses RFID tags and sensors mounted on windows and doors, allowing for partial opening without triggering an alarm by setting threshold distances, and includes a magnetic field sensor with an indicator light for visual confirmation of correct placement, enabling secure ventilation without false alarms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a security alarm system uses a sensor to detect when a window or door is opened, then security is improved, but the system incorrectly triggers alarms when the window or door is partially opened for ventilation

Engineering Contradiction:

Improvesecurity detection accuracyVSAvoidventilation usability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies parameter changes by introducing a threshold distance parameter that distinguishes between authorized partial opening (for ventilation) and unauthorized full opening. The sensor system measures the opening distance parameter and compares it against the threshold to determine whether to trigger an alarm, thereby resolving the contradiction between security detection accuracy and ventilation usability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system uses feedback by continuously monitoring the position of the window or door through the sensor and providing real-time feedback to the control system. This feedback mechanism allows the system to adjust its response based on the detected opening distance, triggering an alarm only when the threshold is exceeded, thus maintaining both security and ventilation functionality

Inventive Principle:

Principle #23Feedback

2Reliability

If existing security systems trigger alarms on any opening, then security is enhanced, but false alarms occur during legitimate ventilation use

Engineering Contradiction:

Improvesecurity alert accuracyVSAvoidfalse alarm information

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent resolves this contradiction by changing the detection parameter from a binary open/closed state to a continuous distance measurement parameter. By introducing the threshold distance parameter, the system can distinguish between legitimate ventilation openings (below threshold) and security threats (above threshold), eliminating false alarms while maintaining security alert accuracy

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If RFID tags and sensors are mounted on windows and doors with threshold distance detection, then secure ventilation is enabled, but device complexity increases

Engineering Contradiction:

Improveventilation security controlVSAvoidsensor placement and configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent reduces device complexity by using inexpensive, readily available RFID tags and standard magnetic field sensors instead of specialized expensive components. The system leverages common off-the-shelf parts that can be easily configured and replaced, making the complex threshold detection functionality accessible and practical for widespread implementation

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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

The system effectively prevents unauthorized full opening while allowing partial opening for ventilation, providing secure and reliable operation with visual confirmation of sensor placement, thus enhancing security and usability.

Implementation Method 1

a sensor which is capable of detecting the object within a predetermined range

Methodology Applied

Scientific EffectMagnetic field detection: Magnetic Field

Implementation Method 2

a magnetic field sensor with an indicator light for visual confirmation of correct placement

Methodology Applied

Scientific EffectLight emission: Light Emitting Diode

Data Source

PatentUS11763652B2Method of arranging a security alarm system on a window/door and framing, and combination comprising the window/door, framing and security alarm system thereof

Publication Date: 2023.09.19 1010210 B C

AI summary

There is provided a method of arranging a security alarm system on a window/door and framing. The system includes an object and a sensor which is capable of detecting the object within a predetermined range. The method includes positioning a first of the sensor and object on a first of the window/door and framing. The method includes opening the window/door to a threshold distance which facilitates ventilation and inhibits an intruder from passing through the window/door. The method includes positioning a second of the sensor and object along a second of the window/door and framing such that the sensor is able to detect the object as the window/door is opened up to but not past the threshold distance. There is also provided in combination, a window/door, framing extending about the window/door and a security alarm system coupled to the window/door and framing in the manner described above.