Swinging Door Test System for Magnetic Switch Sensitivity

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Solution Overview

Problem

Magnetic switches used for door or window detection exhibit variability in sensitivity due to differences in magnets and switches, making it challenging to determine the precise door displacement distance that triggers a secondary effect, such as activating an alarm, without manual testing.

Innovation Solution

A swinging door test system with an actuator that opens and closes a door at precise increments, controlled by software to measure the displacement distance at which a magnetic switch activates, using a potentiometer to correlate actuator position with door displacement and verify results automatically.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If magnetic switches are used with different magnets and switches, then the sensitivity varies widely, but this makes it difficult to determine the precise door displacement distance that triggers the secondary effect

Engineering Contradiction:

Improvemagnetic switch sensitivity variationVSAvoiddoor displacement distance measurement

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

A door position indicator (such as a marker or sensor) is introduced as an intermediary element to accurately track and indicate the position of the door during testing. This intermediary provides a clear reference point that allows precise measurement of door displacement distance, resolving the measurement difficulty caused by varying magnetic switch sensitivities

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The manual testing method is replaced with an automated testing system that uses an actuator to open and close the door, combined with electronic sensors and controllers to automatically detect when the magnetic switch triggers the secondary effect. This substitution eliminates operator intervention and provides more precise, consistent measurements

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If manual testing is used to determine door displacement distance, then operator intervention is required, but this reduces testing accuracy and increases variability

Engineering Contradiction:

Improvemanual testing operationVSAvoiddoor displacement distance measurement

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The testing system is designed to be self-operating, where the actuator automatically opens and closes the door, sensors automatically detect the trigger point, and the system automatically records and reports the door displacement distance. This self-service capability eliminates operator intervention entirely, ensuring consistent, repeatable measurements without human error

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system incorporates feedback mechanisms where sensors continuously monitor door position and magnetic switch state, providing real-time data to the controller. When the magnetic switch triggers the secondary effect, the feedback loop immediately captures the door position data, ensuring accurate measurement of the trigger displacement distance

Inventive Principle:

Principle #23Feedback

3Productivity

If the door is opened and closed manually to test magnetic switch sensitivity, then operator time and intervention are required, but this reduces testing efficiency and consistency

Engineering Contradiction:

Improvetesting efficiencyVSAvoidtesting consistency

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The actuator performs periodic opening and closing cycles of the door at controlled intervals, automatically repeating the testing process multiple times. This periodic action allows for efficient data collection across multiple cycles, improving both productivity and reliability through repeated measurements that can be averaged or analyzed for consistency

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The automated testing system maintains continuous operation, with the actuator continuously opening and closing the door without interruption or manual intervention. This continuous useful action maximizes testing productivity while ensuring consistent application of the same testing parameters throughout, eliminating variability introduced by manual operation

Inventive Principle:

Principle #20Continuity of useful action

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 accurately determines the sensitivity of magnetic switches, reducing variability and operator intervention by repeatedly cycling the door opening and closing to measure the exact displacement distance at which the magnetic switch activates, ensuring reliable testing.

Implementation Method 1

Magnetic switches can be used to detect whether a door or window is in an open or closed position by using a magnet to close a circuit

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

An actuator opens and closes a swinging door at precise increments to determine the door displacement distance

Methodology Applied

Scientific EffectMechanical force: Mechanical Force

Data Source

PatentUS11199587B2Swinging door test system

Publication Date: 2021.12.14 THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY

AI summary

The present invention relates to a swinging door test system that can test the accuracy of a balanced magnetic switch installed on a mock door. An actuator opens and closes a door to change the magnetic switch state. Software implementation allows the actuator to be precisely controlled over many cycles to save time and effort.