Wall-Mounted Controller With Acceleration-Based Anti-Tamper Detection
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Solution Overview
Problem
Wireless controllers can be misplaced, lost, or misappropriated, leading to loss of operational control and unauthorized use, particularly in applications where a traditional wall-mounted switch appearance is desired.
Innovation Solution
A wall-mounted controller equipped with a solid-state acceleration sensor to detect its fixed orientation and prevent wireless communication when removed from its mounting location, featuring anti-tamper modes and calibration mechanisms to ensure proper installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless controllers are made portable and wireless, then ease of operation is improved, but security and anti-tamper capability deteriorate
Solution Approach 1:
The controller dynamically changes its operational state based on detected acceleration patterns. The system transitions between normal operation mode and anti-tamper mode by monitoring acceleration samples, enabling the portable device to adapt its security behavior in response to physical movement conditions.
Solution Approach 2:
The patent replaces traditional mechanical anti-tamper mechanisms (such as physical locks or fixed mounting requirements) with an electronic sensor-based system. The acceleration sensor detects movement and orientation changes to determine if the device has been removed from its mounting location, substituting mechanical security with electronic detection and response.
2Reliability
If acceleration sensing is added for anti-tamper detection, then security is improved, but device complexity increases
Solution Approach 1:
The acceleration sensor serves multiple functions: it detects both the orientation of the controller and movement patterns indicative of removal attempts. By using a single sensor for multiple detection purposes, the system achieves enhanced security functionality without proportionally increasing device complexity.
Solution Approach 2:
The system automatically monitors its own physical state using the acceleration sensor and autonomously determines when anti-tamper measures should be activated. The processor compares acceleration samples against stored reference data and automatically transitions to anti-tamper mode without requiring external intervention or complex configuration systems.
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
Prevents unauthorized removal and misuse by disabling wireless communication when the controller is moved from its installed position, providing secure operation and preventing unauthorized use.
Implementation Method 1
a sensor configured to obtain and store acceleration samples corresponding to an orientation of the controller
Data Source
AI summary
A method of operating a controller includes: obtaining calibration data for a mounting orientation of the controller operating in a calibration mode based on obtaining first acceleration samples from an acceleration sensor; obtaining second acceleration samples from the acceleration sensor when a control switch is activated with the controller operating in a normal operating mode; performing a comparison of the second acceleration samples to the calibration data; based on the comparison, determining whether more than one of the second acceleration samples is not within a specified range; and in response to determining that more than one of the second acceleration samples is not within the specified range, causing the controller to operate in an anti-tamper mode.