Vehicle Object Detection Device Distance Correction
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Solution Overview
Problem
Existing distance measurement methods for vehicles face challenges in environments unsuitable for laser distance measurement, leading to low compatibility and reliability.
Innovation Solution
An object detection device for vehicles that combines a first detection unit, such as a millimeter wave sensor, with a second detection unit, like a stereo camera, to calculate and correct distance measurements, enhancing accuracy and compatibility across various environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser distance measuring means is used to measure distance to feature points extracted from images, then distance measurement accuracy is improved, but compatibility for distance measurement in various environments deteriorates
Solution Approach 1:
The patent combines multiple detection units with different detection principles (image capturing means for optical detection and multiple types of distance measuring means including laser and non-laser methods) into a single object detection device. This merging allows the system to leverage the high precision of laser measurement while compensating for environmental limitations through alternative detection methods, thereby achieving both accuracy and compatibility.
Solution Approach 2:
The object detection device is designed with multi-functional capability by incorporating both image capturing means and multiple distance measuring means that can operate in different environments. The system can switch between or combine different measurement methods (laser, non-laser, image-based) depending on environmental conditions, making it universally applicable across various scenarios while maintaining measurement precision.
2Measurement precision
If only laser distance measuring means is used, then distance measurement accuracy is improved, but reliability in environments unsuitable for laser measurement deteriorates
Solution Approach 1:
The patent changes the detection parameters by incorporating multiple types of distance measuring means with different operating characteristics. When laser measurement becomes unreliable due to environmental factors, the system can switch to non-laser distance measuring methods or image-based depth estimation, thereby maintaining reliability while preserving accuracy through parameter adaptation.
Solution Approach 2:
The system prepares multiple detection units and measurement methods in advance to cushion against potential failures or unsuitability of any single method. By having alternative distance measuring means ready, the system can compensate for laser measurement failures before they occur, ensuring continuous reliable operation in varying environments.
Data Source
AI summary
The present invention provides a object detection device for vehicle capable of performing distance measurement more reliably than in the past and having high compatibility for distance measurement. The present invention provides an object detection device 100 for vehicle including a first detection unit 10, a second detection unit 20, an error quantity calculation unit 30, a correction quantity calculation unit 40, and a distance correction unit 50. The error quantity calculation unit 30 compares the distances D1 and D1′ of the same object detected by the first detection unit 10 and the second detection unit 20 to calculate the error quantity ΔD. The correction quantity calculation unit 40 calculates the correction quantity CAt based on the error quantity ΔD. The distance correction unit 50 corrects the distances D1′ and D2′ of the object detected by the second detection unit 20 based on the correction quantity CAt.