Ultrasonic Road Surface Detection Using Reference Echo Comparison
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Solution Overview
Problem
Existing object detection and movable body control devices are susceptible to limitations in accurately detecting objects and road surface conditions using ultrasonic waves, particularly in varying frictional resistance scenarios.
Innovation Solution
An object detection device equipped with transmission and reception units that transmit ultrasonic waves and receive reflected waves, generating echo information to calculate distances and detect changes in road surface frictional resistance by comparing echo information with reference data, enabling accurate object and road surface condition assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If ultrasonic waves are transmitted and received to detect objects and road surface conditions, then object detection capability is provided, but measurement precision deteriorates due to inability to accurately detect frictional resistance changes
Solution Approach 1:
The system performs preliminary actions by storing reference echo information under known road surface conditions before actual detection. This pre-stored reference data enables subsequent comparison with current echo information to accurately detect frictional resistance changes, resolving the measurement precision issue.
Solution Approach 2:
The system implements feedback by continuously comparing current echo information with stored reference echo information. This comparison provides feedback on road surface condition changes, enabling accurate detection of frictional resistance variations that were previously undetectable.
2Measurement precision
If echo information is compared with reference data to detect road surface changes, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The ultrasonic detection device performs multiple functions: it detects both object distance and road surface frictional resistance conditions using the same transmission and reception units. This multi-functionality improves detection accuracy without requiring separate dedicated systems, thus avoiding increased device complexity.
Solution Approach 2:
The system uses its own echo information from normal object detection operations to also detect road surface conditions. By utilizing the existing detection signals for dual purposes, the system achieves improved measurement precision without adding separate detection hardware or increasing overall device 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
The device effectively detects changes in road surface frictional resistance and objects, enhancing the control of movable bodies by providing reliable real-time data for improved safety and navigation.
Implementation Method 1
a transmission and reception unit configured to transmit a transmission wave from a movable body moving on a road surface and receive a reflected wave from an object
Implementation Method 2
generate road surface information regarding a change in the road surface based on a difference between echo information indicating a change over time in an intensity of the reflected wave
Data Source
AI summary
An object detection device includes: a transmission and reception unit configured to transmit a transmission wave from a movable body moving on a road surface and receive a reflected wave from an object; and a generation unit configured to generate road surface information regarding a change in the road surface based on a difference between echo information indicating a change over time in an intensity of the reflected wave received by the transmission and reception unit and reference echo information indicating a predetermined change over time in an intensity of a reflected wave from the road surface.