Active Radar Object Detection to Reduce False Security Alarms
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Solution Overview
Problem
Existing security systems using passive infrared detectors (PIR) for motion detection often trigger false alarms due to pets or other non-threatening objects, leading to unnecessary power consumption and user nuisance.
Innovation Solution
An apparatus utilizing an active reflected wave detector, such as a radar sensor, to measure wave reflections, process the data to identify objects, and selectively output deterrents like lighting or audio based on predetermined conditions, such as the object being human and within a specific area, thereby reducing false triggers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a passive infrared detector is used to detect motion and trigger deterrents, then motion detection capability is provided, but false alarms increase due to pets or non-threatening objects
Solution Approach 1:
The system segments the detection process into multiple stages: initial motion detection by PIR sensor, followed by secondary identification by the reflected wave detector. This multi-stage segmentation allows the system to filter out false alarms from pets while maintaining sensitivity to human intruders, resolving the contradiction between detection reliability and false alarm reduction.
Solution Approach 2:
The reflected wave detector acts as an intermediary component between the motion sensor and the deterrent output device. It mediates the detection process by providing additional verification of detected objects, enabling the system to distinguish between threats and non-threats, thereby reducing false alarms while maintaining reliable motion detection.
2Reliability
If deterrents are activated for every motion detection event, then security response is provided, but power consumption increases unnecessarily
Solution Approach 1:
The system applies partial action by activating the full security response (deterrents) only when the reflected wave detector confirms a human threat, rather than for every motion event. This selective activation maintains security effectiveness for genuine threats while significantly reducing unnecessary power consumption from false alarm responses.
Solution Approach 2:
The system implements feedback through the reflected wave detector that provides information about the nature of detected objects. This feedback mechanism allows the control logic to make informed decisions about whether to activate deterrents, optimizing the balance between security response effectiveness and power consumption by avoiding unnecessary activations.
3Measurement precision
If the reflected wave detector continuously monitors the environment, then object identification accuracy improves, but power consumption increases
Solution Approach 1:
The reflected wave detector operates periodically rather than continuously, activating only when the PIR sensor detects motion. This periodic operation maintains object identification accuracy when needed while dramatically reducing power consumption during periods when no motion is present, resolving the contradiction between measurement precision and energy usage.
Solution Approach 2:
The PIR sensor performs preliminary motion detection before activating the more power-intensive reflected wave detector. This preliminary action allows the system to prepare for potential threats efficiently, activating high-precision detection only when necessary, thereby maintaining object identification accuracy while minimizing overall power consumption.
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
Reduces false alarms by accurately identifying humans and activating deterrents only when necessary, conserving power and minimizing user inconvenience.
Implementation Method 1
an active reflected wave detector, such as a radar sensor, to measure wave reflections
Data Source
AI summary
An apparatus, method, and system for detecting an object in an environment. The apparatus comprises: a processor configured to: control an active reflected wave detector to measure wave reflections from the environment to accrue measured wave reflection data; process the measured wave reflection data to detect an object in said environment; in response to detection of said object, determine whether a first predetermined condition in respect of the object is met; and if the first predetermined condition is met, control an output device to output a deterrent.