Tamper-Evident Security Device Using Multi-Sensor Signal Evaluation
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Solution Overview
Problem
Existing RFID systems with sensors cannot detect if the security device has been manipulated or removed from its intended support, leading to potential irregularities in monitoring or identification.
Innovation Solution
A security device equipped with sensors that detect movements, accelerations, and material properties of the support, connected to an electronic system for signal evaluation, which triggers actions if deviations from target signals are detected, such as generating signals or storing signal deviations to indicate manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID systems with sensors are used to monitor product characteristics, then monitoring capability is improved, but the ability to detect manipulation or removal of the device is lost
Solution Approach 1:
The security device is divided into multiple independent sensor components (capacitive sensor, inductive sensor, acceleration sensor) that can detect different types of manipulation. Each sensor monitors specific parameters independently, allowing the system to detect removal, replacement, or unauthorized handling of the device from the support object.
Solution Approach 2:
The electronic system continuously receives feedback signals from multiple sensors and compares them against expected values. When deviations are detected (such as changes in capacitance, inductance, or acceleration patterns indicating removal), the system triggers alarm signals or stores the deviation for later analysis, providing real-time detection of manipulation.
2Reliability
If sensors are added to detect manipulation, then security against removal is improved, but device complexity increases
Solution Approach 1:
Multiple sensor types (capacitive, inductive, acceleration sensors) are merged into a single integrated security device that can be attached to the support object. The electronic system consolidates signals from all sensors, combining their monitoring functions into one unified device that provides comprehensive security without requiring separate independent systems.
Solution Approach 2:
The security device is designed with multi-functionality, where the same device structure and electronic system can detect multiple types of manipulation events (removal, replacement, unauthorized handling) using different sensor mechanisms. This universal design allows a single device to perform multiple security functions without requiring separate specialized systems for each detection type.
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 removal or reattachment of the security device, ensuring continuous monitoring and identification of the original support by detecting changes in signals indicative of manipulation, providing a high level of security against tampering.
Implementation Method 1
the sensor is of the capacitive and/or inductive type for detection of the material properties of the support and/or of the security device. Alterations in voltage which are produced by or during the removal of the security device from the support or by the replacement of the support are detected by the sensor
Implementation Method 2
the sensor is of the capacitive and/or inductive type for detection of the material properties of the support and/or of the security device
Implementation Method 3
the sensor for detection of the movements and/or accelerations of the security device relative to the support is an acceleration, magnetic field and/or rotational rate sensor
Implementation Method 4
the sensor for detection of the movements and/or accelerations of the security device relative to the support is an acceleration, magnetic field and/or rotational rate sensor
Data Source
AI summary
The invention relates to a security device with sensors for checking whether the security device (1) is in an undamaged state and checking for the presence of a specified support (9) of the security device (1), said support (9) being an object, in particular a mechanical or electronic component, characterized in that the sensors detect movements and/or accelerations of the security device (1) relative to the support (9) and/or material properties of the support (9) and/or of the security device (1) and are connected to an electronic system (3) for signal evaluation. In a method for using such a security device (1) the state of the security device (1) and the presence of a specified support (9) are ascertained multiple times and in different ways, wherein signals are used which are obtained as actual values and which are compared with specified target values in an electronic system (3). An action is triggered upon a deviation of at least one of the actual values from the target values.