Corner PIR Sensor with Strobe Light for False Alarm Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing security systems based on PIR sensors often suffer from false alarm triggers and are limited by internal mounting, vulnerability to power failures, and lack of external deterrence, requiring improvements for effective outdoor installation and community security integration.
Innovation Solution
A corner articulated PIR detection device with two PIR sensors and a strobe light, mounted externally, using a self-propagating data network for enhanced security, solar power, and a two-stage adhesive fixing system for easy installation, allowing concurrent detection zone triggering and integration into a community security system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PIR sensors are mounted internally within a building, then the alarm system can be activated, but the intruder has already entered the property before any deterrent is initiated
Solution Approach 1:
The detection function is segmented into two separate sensors: one for detecting intruder presence (internal mounting) and another for detecting approach (external mounting with strobe light). This segmentation allows the system to detect both internal intrusion and external approach, resolving the contradiction between reliable detection and effective deterrence.
Solution Approach 2:
The external PIR sensor with strobe light performs preliminary detection of approaching intruders before they enter the building. By detecting the approach in advance and activating the strobe light externally, the system provides early warning and deterrence, preventing the intruder from successfully entering the property.
2Reliability
If conventional alarm systems are hardwired and installed by professionals, then the system is reliable, but the installation complexity and cost increase
Solution Approach 1:
The hardwired mechanical connection system is replaced with a wireless communication system. The external PIR sensor unit communicates with the internal alarm control panel through wireless signals, eliminating the need for physical wiring during installation. This maintains system reliability while dramatically simplifying installation and reducing costs.
Solution Approach 2:
The system enables self-installation by eliminating complex wiring requirements. Users can install the external PIR sensor unit independently using simple adhesive mounting, without requiring professional alarm system installers. The wireless communication handles the connection automatically, making the system self-sufficient and easy to deploy.
3Stability of the object's composition
If conventional alarm systems are powered by the main electrical system, then the system is stable, but the system becomes vulnerable to power failures affecting the structure
Solution Approach 1:
A solar panel is introduced as an intermediary power source between the external PIR sensor and the internal alarm system. The solar panel converts solar energy into electrical energy to power the external detection unit, isolating it from the main electrical system's vulnerabilities. This intermediary power source provides stable operation independent of building power failures.
Solution Approach 2:
The dependency on the main electrical system is replaced with solar energy conversion. Instead of drawing power from the building's electrical system, the external PIR sensor unit is powered by solar panels, eliminating vulnerability to power failures while maintaining stable operation in the external environment.
4Device complexity
If a single PIR sensor is used, then the device is simple, but false alarm triggers occur frequently
Solution Approach 1:
The detection function is divided into two separate PIR sensors: one internal for detecting intruder presence and one external for detecting approach. Each sensor has its own detection zone, and both must be triggered for a valid alarm. This segmentation reduces false alarms by requiring correlated detection events from both sensors while maintaining relative simplicity.
Solution Approach 2:
Two separate PIR sensors are merged into a coordinated detection system where both sensors must detect motion within their respective zones for a valid alarm to be triggered. This merging of detection functions reduces false alarms by requiring consistent detection across multiple sensors while maintaining system simplicity.
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 solution significantly reduces false alarms, provides effective external deterrence through visual and audible alerts, and enables a community security system with geo-coordinate tagging and self-propagating data communication, enhancing security system reliability and user-installability.
Implementation Method 1
passive infrared (PIR) corner motion detection device
Implementation Method 2
PIR sensors... having four IR sensitive elements
Data Source
AI summary
A security detection device and system for reducing false triggers is provided. The security detection device is a corner mount devices that may be mounted on the outside corners of building and structures. The security detection device may further communicate via a communications data network with other security detection devices to a community server to create a shared community alarm system.