Auto-Configurable Occupancy Sensing for Battery-Efficient Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Home security systems face inefficiencies due to the need for separate motion and occupancy sensors, which leads to increased battery consumption and inaccurate occupancy detection, especially in high-traffic areas.
Innovation Solution
A single sensor device that can automatically switch between motion and occupancy modes, using passive infrared and thermopile sensors to detect movement and presence, respectively, and transmit signals to security and automation hubs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If occupancy sensors transmit signals every time occupancy is sensed, then occupancy detection accuracy is improved, but battery life deteriorates
Solution Approach 1:
The sensor dynamically adjusts its transmission frequency based on the detected occupancy pattern. In high-traffic areas where occupancy changes frequently, the sensor transmits more often to maintain accuracy. In low-traffic areas, it reduces transmission frequency to conserve battery power, thus resolving the contradiction between accurate occupancy detection and battery life
Solution Approach 2:
The sensor changes the parameter of transmission frequency based on environmental conditions and occupancy patterns. By monitoring the rate of occupancy change and adjusting the transmission interval accordingly, the system optimizes the balance between detection accuracy and power consumption, allowing the same sensor to adapt to different operational scenarios
2Duration of action of moving object
If motion sensors use a preset dwell time to limit transmissions, then battery life is improved, but occupancy detection accuracy deteriorates
Solution Approach 1:
The system replaces the static dwell time mechanism with a dynamic transmission strategy. Instead of forcing a fixed time interval that may miss occupancy events, the sensor intelligently determines when transmissions are necessary based on detected changes in the environment, thus maintaining both battery efficiency and detection accuracy
Solution Approach 2:
The sensor autonomously decides when to transmit based on its own detections of occupancy patterns. By self-managing its transmission schedule according to actual environmental conditions rather than following a rigid preset timer, the system optimizes both power consumption and detection accuracy without external intervention
3Adaptability or versatility
If separate motion sensors and occupancy sensors are used, then detection functionality is improved, but device complexity and cost increase
Solution Approach 1:
A single sensor device is designed to perform both motion detection and occupancy detection functions. By integrating multiple sensing capabilities and intelligent processing algorithms into one unit, the system eliminates the need for separate dedicated sensors, reducing overall system complexity and cost while maintaining full detection functionality
Solution Approach 2:
The single sensor dynamically switches between different detection modes (motion detection mode and occupancy detection mode) based on environmental conditions and operational requirements. This dynamic mode switching allows one sensor to adaptively fulfill the roles of multiple specialized sensors, resolving the contradiction between functionality and complexity
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
Enhances battery life and improves occupancy detection accuracy by optimizing transmission frequency based on mode, reducing the need for multiple sensors and minimizing power consumption.
Implementation Method 1
using passive infrared and thermopile sensors to detect movement and presence
Implementation Method 2
using passive infrared and thermopile sensors to detect movement and presence
Data Source
AI summary
A person-detection device that automatically configures itself as a motion sensor or an occupancy sensor upon receiving a command from a home security panel or home automation hub.