Intrusion Detection Sensor Nodes RSS Activation Modes
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Solution Overview
Problem
Current intrusion detection systems are not energy efficient and lack effective methods to differentiate between normal and abnormal movements, leading to unnecessary power consumption and potential false alarms.
Innovation Solution
A wireless network of sensor nodes that collect changes in received signal strength (RSS) and switch between partial and full activation modes, with a base station issuing messages for event notifications, activation, and termination, allowing for efficient energy use and accurate detection of abnormal movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the intrusion detection system operates in full activation mode to continuously monitor and detect intrusions, then the detection accuracy and reliability are improved, but the energy consumption increases significantly
Solution Approach 1:
The system dynamically switches between full activation mode and low power mode based on detected conditions. Sensor nodes operate in low power mode during normal conditions and transition to full activation mode when motion is detected, allowing the system to maintain detection reliability while minimizing energy consumption during prolonged idle periods
Solution Approach 2:
The system uses periodic motion detection triggers to activate full monitoring. Instead of continuous operation, the system periodically checks for motion and only activates full detection capabilities when motion is detected, creating a rhythm of high and low power states that reduces overall energy consumption while maintaining security
2Use of energy by moving object
If the system operates in low power mode to conserve energy, then the power consumption is reduced, but the detection speed and responsiveness to intrusions decreases
Solution Approach 1:
Motion sensors continuously operate in low power mode to detect motion in advance. When motion is detected, the system preliminarily activates full detection mode before a potential intrusion is confirmed, ensuring rapid response while keeping the system in energy-saving mode during normal conditions
3Measurement precision
If the system continuously monitors all sensor nodes to detect abnormal movements, then the detection precision is improved, but the false alarm rate increases due to inability to differentiate normal and abnormal movements
Solution Approach 1:
The system uses feedback from multiple sensor nodes to distinguish between normal and abnormal movements. When motion is detected, the base station sends activation messages to neighboring sensor nodes to verify the event. The feedback loop allows the system to confirm whether detected motion is genuine intrusion or normal activity, reducing false alarms while maintaining detection precision
Solution Approach 2:
The monitoring area is divided into multiple zones with individual sensor nodes. Each node independently monitors its zone and reports to the base station. This segmentation allows the system to focus detection resources on specific areas where motion is detected rather than continuously monitoring all zones at full capacity, improving precision while reducing false alarms
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 reduces power consumption by using low power modes for normal conditions and increases accuracy in detecting intrusions, triggering alarms only when necessary, thereby enhancing energy efficiency and reducing false alarms.
Implementation Method 1
collect changes in received signal strength (RSS) at a site
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
The intrusion detection system includes a base station and a plurality of sensor nodes communicatively coupled to the base station. The intrusion detection system may be connected to other client devices via a server or a network. The base station sets at least one of the sensor nodes into either a partial system activation mode or full system activation mode. The base station triggers an alarm event including information to a stakeholder in the event an abnormal movement or behavior is detected. The base station transmits a message to the sensor node and deactivates the sensor node. The sensor node return to low power mode.