Hemispherical Smart Sensor for Road Lighting Detection
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Solution Overview
Problem
Current road lighting systems lack expandability, interoperability with heterogeneous devices, and effective sensor detection range, leading to inefficient energy use and safety concerns due to sensor errors and vibration-induced dimming issues.
Innovation Solution
An integrated smart sensor device combining motion, noise, optical, and vibration sensors with ZigBee or Bluetooth communication, capable of real-time data transmission to control systems and emergency vehicles, and self-diagnosis of lighting components, with a hemispherical infrared sensor configuration for enhanced detection zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sensor is used for motion detection, then the device complexity is reduced, but the sensor detection range is limited to about 50 degrees
Solution Approach 1:
The patent divides the detection system into multiple sensors arranged in a hemispherical configuration. Each sensor covers a specific angular sector, and together they provide 360-degree horizontal and vertical coverage, resolving the limitation of single-sensor detection range while maintaining manageable complexity through modular arrangement.
Solution Approach 2:
The hemispherical sensor array serves multiple functions simultaneously: it provides omnidirectional motion detection, enables accurate object localization through triangulation, and maintains a compact form factor. This multi-functional design achieves expanded detection coverage without proportionally increasing device complexity.
2Adaptability or versatility
If multiple sensors are integrated with communication modules, then the interoperability and expandability are improved, but the device complexity increases
Solution Approach 1:
The integrated smart sensor device incorporates multiple communication protocols (ZigBee, Bluetooth, WiFi) and standardized interfaces that enable it to function as a universal node in heterogeneous IoT networks. This allows the device to interoperate with diverse systems (streetlights, emergency vehicles, smartphones) without requiring custom integration for each partner system, thus improving adaptability while managing complexity through standardization.
Solution Approach 2:
The device includes real-time status monitoring and self-diagnosis capabilities that provide feedback on operational conditions, connection states, and sensor performance. This feedback mechanism enables automatic adjustment and troubleshooting, reducing the operational complexity of managing multiple integrated components and communication protocols.
3Reliability
If sensor detection range is expanded to 360 degrees, then the road safety is improved, but the energy consumption increases
Solution Approach 1:
The sensor system employs periodic scanning and event-triggered detection rather than continuous monitoring of all sensors at full power. When motion is detected in one sector, the system activates nearby sensors to track the object's trajectory, while distant or inactive sectors enter low-power mode. This periodic operation maintains 360-degree safety coverage while significantly reducing average energy consumption compared to continuous full-array operation.
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 integrated smart sensor device expands detection range, enhances safety by interlocking with heterogeneous devices, optimizes energy use, and provides real-time monitoring and self-correction capabilities, addressing sensor errors and vibration-induced issues.
Implementation Method 1
a passive infrared sensor that detects movement of an object to generate movement information of the object
Data Source
AI summary
An integrated smart sensor device, which is installed on one of a fixing pole standing on a ground or a bottom surface of facility, a fixing arm extending from the fixing pole in a horizontal direction, or a lighting device installed on the fixing arm and in which a plurality of sensors are installed, according to an embodiment of the present invention includes: a base; a main substrate which is disposed on one surface of the base and on which a plurality of electric components are mounted; a sensor substrate disposed on one surface of the main substrate; an infrared sensor assembly mounted on the sensor substrate and including a plurality of infrared sensors configured to detect movement of an object; a housing coupled to an edge of the base to accommodate the main substrate and the sensor substrate; a lens cover coupled to one side of the housing and having a hemispherical shape in which a plurality of lens arrays are provided; and a hemispherical divider disposed between the lens cover and the infrared sensor assembly so that infrared rays passing through the plurality of lens arrays are focused to be divided to the plurality of infrared sensors.