Wireless Access Point Radar for CO2 Sensor Calibration
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Solution Overview
Problem
Existing methods for tracking occupancy in office buildings and enclosed spaces, such as IR sensors, cameras, LiDAR, and CO2 sensors, face limitations including high cost, deployment constraints, and accuracy issues, particularly with CO2 sensors requiring frequent recalibration, leading to uncertain sensor data.
Innovation Solution
A radar-assisted environment monitoring system using a wireless access point with a field of view for detecting sentient beings, coupled with a CO2 sensor, calibrates the CO2 sensor to a default value when no sentient beings are detected within the radar's field of view, utilizing mmWave radar for accurate counting and tracking, and fusing radar and environmental sensor data to minimize uncertainty.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CO2 sensors are used for occupancy detection, then occupancy levels can be tracked, but sensor accuracy drifts over time requiring frequent calibration
Solution Approach 1:
The system uses radar detection results as feedback to automatically adjust CO2 sensor calibration. When radar detects absence of occupants, the system feeds back to reset the CO2 sensor to default values, eliminating drift and reducing the need for manual calibration while maintaining continuous accurate occupancy detection
Solution Approach 2:
Radar technology serves as an intermediary between the CO2 sensor and the occupancy detection system. It provides independent verification of occupant presence that mediates the CO2 sensor's drift, allowing automatic correction without manual intervention and improving overall system reliability
2Measurement precision
If cameras and LiDAR are used for occupancy detection, then detection accuracy improves, but deployment cost and device complexity increase
Solution Approach 1:
The system merges radar technology with existing wireless access points and CO2 sensors into a unified occupancy detection system. This combination achieves accurate occupancy tracking without requiring separate camera or LiDAR installations, reducing device complexity while maintaining precision
Solution Approach 2:
The wireless access point is given multiple functions: it serves as both a network device and a radar-based occupancy detector. This multi-functionality eliminates the need for dedicated occupancy sensors in each location, reducing overall system complexity while maintaining detection accuracy across large areas
3Area of stationary object
If multiple sensors are deployed for large area monitoring, then coverage improves, but system cost and complexity increase
Solution Approach 1:
The system dynamically adjusts the operational state of sensors based on real-time radar detection. When no occupants are detected, the CO2 sensor is reset to default values, allowing the system to adaptively manage sensor resources and maintain accurate coverage across large areas without requiring excessive sensor density
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 provides accurate and cost-effective occupancy tracking by reducing sensor uncertainty through radar-assisted calibration, enabling precise monitoring of sentient beings and minimizing errors in CO2 sensor readings.
Implementation Method 1
providing a radar with a field of view for detecting sentient beings within an area
Implementation Method 2
providing a radar using a wireless communication signal of a wireless access point
Data Source
AI summary
Method and apparatus including a wireless access point system with an environmental sensor adapted to detect an environmental parameter of an area and a wireless access point. The wireless access point includes a wireless communication module adapted to provide a wireless communication signal; a radar module adapted to provide, via the wireless communication signal, a radar with a field of view of or within the area; and an object detection module adapted to determine if one or more sentient beings are present within the field of view, the wireless access point system adapted to calibrate the environmental sensor based on the object detection module determining, for a time duration, an absence of the one or more sentient beings.