Vehicle Size Measurement Accuracy via Multi-Position Sensor Analysis

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Solution Overview

Problem

Existing vehicle detection systems face challenges in accurately measuring vehicle size due to varying measurement accuracy across different positions within a large detectable area, leading to inconsistent results with radar and camera sensors.

Innovation Solution

An information generation device and method that obtain multiple measurements of a vehicle's size from different positions, detect the accuracy of each measurement, and determine the vehicle size based on the highest accuracy result, allowing for accurate vehicle type determination and traffic flow measurement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a single sensor is used to detect vehicles in a large area, then the installation cost is reduced, but the measurement accuracy of vehicle size varies depending on position

Engineering Contradiction:

Improveinstallation costVSAvoidvehicle size measurement accuracy

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent divides the vehicle size measurement task into multiple independent measurements taken at different positions. Instead of relying on a single measurement that may be inaccurate due to position, the system performs multiple measurements and selects the most accurate one, effectively segmenting the measurement process to overcome positional accuracy variations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the parameter of measurement position by moving the sensor to multiple different positions around the vehicle. By varying the positional parameter and evaluating accuracy at each position, the system identifies the optimal measurement position, thereby resolving the contradiction between using a single sensor and maintaining measurement accuracy.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If multiple sensors are installed to ensure measurement accuracy across all positions, then the measurement accuracy is improved, but the installation cost increases

Engineering Contradiction:

Improvevehicle size measurement accuracyVSAvoidinstallation cost

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

Instead of installing multiple sensors simultaneously (excessive action), the patent performs multiple measurements sequentially using a single sensor (partial action). The system takes more measurements than the minimum single measurement, but uses the same hardware resource, thereby achieving high accuracy without the cost of multiple sensors.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If measurements are taken at multiple positions, then the reliability of vehicle size determination is improved, but the measurement time increases

Engineering Contradiction:

Improvevehicle size determination reliabilityVSAvoidmeasurement time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent incorporates feedback by evaluating the accuracy of each measurement result and using this information to select the most accurate measurement. The system measures multiple times, evaluates each result's accuracy, and feeds this information back to determine the final vehicle size, thereby ensuring reliability while managing measurement time through intelligent selection.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20220398850A1Information generation device, information generation method, and non-transitory computer-readable storage medium

Publication Date: 2022.12.15 SUMITOMO ELECTRIC INDUSTRIES LTD

AI summary

An information generation device includes: a measurement unit configured to obtain a plurality of measurement results by performing a measurement of a vehicle size with respect to a same traveling vehicle a plurality of times; a detection unit configured to detect an accuracy of each of the plurality of measurement results; and a determination unit configured to determine a vehicle size of the traveling vehicle from the plurality of measurement results on the basis of the accuracies.