LiDAR Ranging Sensor for Vehicle Passenger Congestion Detection
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Solution Overview
Problem
Existing passenger monitoring systems, such as those disclosed in Patent Literature 1, fail to accurately detect the state of congestion in trains due to a lack of specific configuration and method for counting passengers from received light signals.
Innovation Solution
A passenger monitoring system comprising a ranging sensor that outputs distance information to passengers within a vehicle and a control unit that estimates the state of congestion based on this information, using LiDAR technology to scan and count passengers, thereby providing accurate congestion detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light generating unit and deflection unit are used to receive light signals for passenger counting, then the basic capability of detecting passengers is achieved, but the measurement precision of congestion state detection is insufficient
Solution Approach 1:
The patent replaces complex mechanical/passive light signal processing with active LiDAR ranging sensors that emit and detect light signals to measure distance information. This substitution enables precise passenger counting by directly measuring distances to multiple passengers, transforming the vague light signal reception into quantifiable distance data that can be processed to determine congestion states.
Solution Approach 2:
The patent changes the measurement parameter from simple light signal reception to distance information measurement. By using LiDAR ranging sensors to measure the distance to each passenger, the system transforms qualitative light detection into quantitative distance data, enabling precise calculation of passenger numbers and accurate congestion state detection.
2Reliability
If no specific configuration and method are provided for counting passengers from light signals, then the device structure remains simple, but the reliability of congestion detection deteriorates
Solution Approach 1:
The patent replaces unreliable passive light signal processing with active LiDAR ranging technology. The ranging sensors actively emit light and measure the time of flight to calculate distance, providing reliable and repeatable measurements. This active measurement approach ensures consistent and accurate passenger counting, thereby improving detection reliability.
Solution Approach 2:
The LiDAR ranging sensors perform self-contained distance measurement without requiring complex external processing systems. Each sensor independently measures distances to passengers and provides data that can be directly used for congestion detection, reducing the need for complex signal processing and improving system reliability.
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 effectively detects the state of congestion in trains, allowing for precise monitoring and management of passenger loads, enhancing operational efficiency and passenger experience.
Implementation Method 1
a ranging sensor that is provided in a vehicle and capable of outputting a distance information corresponding to a distance to a passenger in the vehicle
Implementation Method 2
using LiDAR technology to scan and count passengers
Data Source
AI summary
Provided is a passenger monitoring system comprising: a ranging sensor that is provided in a vehicle and capable of outputting a distance information corresponding to a distance to a passenger in the vehicle; and a control unit that estimates a state of congestion of the vehicle based on the distance information.