Object Detector Triangulation Accuracy via Velocity Feedback

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing object detection systems using triangulation calculation with multiple sensors are susceptible to detecting virtual images when multiple objects or moving objects are present, leading to inaccurate location detection.

Innovation Solution

An object detector that performs triangulation calculation using first and second distance information from direct and indirect waves, and includes a prohibition processing unit to prevent calculation when the difference between velocity information from direct and indirect waves exceeds a predetermined range, ensuring accurate object location detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If triangulation calculation is performed using direct waves and indirect waves from multiple sensors, then object location detection capability is improved, but detection accuracy deteriorates when multiple objects or moving objects are present due to virtual image detection

Engineering Contradiction:

Improveobject location detection capabilityVSAvoiddetection accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The system calculates velocity information from both direct waves and indirect waves, then uses this velocity feedback to determine whether triangulation calculation should be performed. When velocity difference exceeds a threshold, the system feedback-prohibits triangulation calculation, thereby preventing virtual image detection and maintaining measurement precision while preserving location detection capability.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system changes the parameter used for triangulation calculation based on velocity information. By comparing velocity values derived from direct and indirect waves, the system dynamically adjusts whether to perform triangulation calculation or not, thereby adapting to different object scenarios (stationary vs. moving) and avoiding virtual image detection.

Inventive Principle:

Principle #35Parameter changes

2Area of stationary object

If multiple two-sensor combinations are set for triangulation calculation, then detection coverage is improved, but the likelihood of detecting virtual images increases when objects are moving

Engineering Contradiction:

Improvedetection coverageVSAvoiddetection reliability

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The system uses velocity information as feedback to control triangulation calculation across multiple sensor combinations. When velocity difference exceeds the threshold, the system prohibits triangulation calculation for all combinations, thereby maintaining detection reliability for moving objects while preserving the expanded detection coverage provided by multiple sensor combinations.

Inventive Principle:

Principle #23Feedback

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

This approach improves detection accuracy by preventing low-accuracy triangulation calculations and curbing the detection of virtual images, thereby enhancing the reliability of object location determination.

Implementation Method 1

transmitting transmitted waves such as ultrasonic waves and millimeter waves and receiving reflected waves from the object

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Implementation Method 2

first distance information calculated on the basis of direct waves

Methodology Applied

Scientific EffectTime of flight: Time of Flight

Implementation Method 3

first velocity information indicating a velocity of an object calculated on the basis of the direct waves

Methodology Applied

Scientific EffectDoppler effect: Doppler Effect

Data Source

PatentUS11709263B2Object detector

Publication Date: 2023.07.25 AISIN CORP

AI summary

An object detector includes: a triangulation calculation unit that performs triangulation calculation for detecting a location of an object based on first distance information calculated based on direct waves in which transmitted waves transmitted from a first transmission and reception unit are reflected by an object and received by the first transmission and reception unit, and second distance information calculated based on indirect waves in which transmitted waves transmitted from a second transmission and reception unit arranged in a location different from the first transmission and reception unit are reflected by an object and received by the first transmission and reception unit; and a prohibition processing unit that prohibits triangulation calculation when a difference between first velocity information indicating a velocity of an object calculated based on the direct waves and second velocity information indicating a velocity of an object calculated based on the indirect waves exceeds a predetermined range.