Wireless Intrusion Sensor Check-In Rate for Tamper Detection
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Solution Overview
Problem
Security systems with infrequent check-ins from wireless sensors can fail to report alarm conditions if sensors are tampered with, leading to extended delays in detection and increased false alarms.
Innovation Solution
Adaptable supervision rates for wireless security sensors, dynamically adjusting from a normal to a higher frequency upon receiving an alarm, ensuring timely confirmation of sensor status and reducing delays in reporting tampering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless security sensors check-in infrequently with the security panel, then battery life is extended and system complexity is reduced, but the system may fail to detect tampering timely and produce false alarms
Solution Approach 1:
The system dynamically adjusts the check-in rate of wireless sensors based on their operational state. When a sensor detects an alarm condition, its check-in rate automatically increases from a normal lower rate to a higher rate, allowing the system to quickly detect tampering while maintaining battery efficiency during normal operation
Solution Approach 2:
The system changes the temporal parameter (check-in rate) of sensor communications based on detected conditions. Upon receiving an alarm from a sensor, the system transitions the sensor from a low-check-in mode to a high-check-in mode, thereby adjusting the detection frequency parameter to match security requirements
2Reliability
If wireless security sensors check-in frequently with the security panel, then tampering detection is improved, but battery life is reduced and system complexity increases
Solution Approach 1:
The system implements dynamic check-in rate adjustment where sensors operate at different frequencies based on their state. During normal operation, sensors check in infrequently to conserve battery. When an alarm condition is detected, the check-in rate increases automatically, providing high detection reliability only when security threats are present
Solution Approach 2:
The system uses periodic check-ins at variable intervals rather than continuous monitoring. The period between check-ins is dynamically adjusted based on sensor alarm status, creating an energy-efficient periodic communication pattern that maintains security when needed and conserves battery during normal conditions
Data Source
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AI summary
Supervisory signals from a first wireless security sensor are received at a first supervisory rate that repeatedly confirms that the first wireless security sensor remains operatively coupled to a security system controller. A first security sensor alarm is received from the first wireless security sensor and in response, the first supervisory rate is changed to a second, higher, supervisory rate. Supervisory signals are received from the first wireless security sensor at the second supervisory rate that repeatedly confirms that the first wireless security sensor remains operatively coupled to the security system controller. When a second security sensor alarm is received from the first wireless security sensor within a predetermined period of time after the first security sensor alarm, an alarm condition detection alarm is issued from the security system controller.