Vehicle Radar Sensor Inspection Using Terahertz Scanning
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Solution Overview
Problem
Existing vehicle radar systems face assembly errors due to small radar cover sizes, leading to reduced sensor precision and potential failure of advanced driver assistance systems (ADAS), necessitating a method for accurate inspection and correction of radar sensor mounting.
Innovation Solution
A system utilizing a terahertz wave scanner to photograph scan images at multiple positions, matching them to detect three-dimensional coordinates, and adjusting the radar sensor angle based on assembly tolerance, ensuring precise alignment and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a small size radar cover is used to improve vehicle appearance, then the aesthetic quality is improved, but assembly error occurs and sensor precision is reduced
Solution Approach 1:
The patent applies preliminary action by performing radar sensor inspection and angle correction before vehicle delivery. The system detects assembly errors in the radar sensor mounting position and angle, then automatically corrects them by adjusting the sensor's mounting angle based on the detected deviation, ensuring precision is restored before the vehicle leaves the factory.
Solution Approach 2:
The patent replaces manual inspection and mechanical adjustment methods with an automated system using radar signals for detection and electronic control for correction. The inspection system uses radar transmission and reception to detect mounting errors, and the correction is achieved through electronic actuation of the radar sensor's mounting angle, substituting mechanical measurement and adjustment with automated sensing and control.
2Device complexity
If manual inspection methods are used for radar mounting, then the inspection process is simple, but inspection accuracy is insufficient and cannot detect subtle assembly errors
Solution Approach 1:
The patent introduces an intermediary radar signal as a mediator between the inspection system and the radar sensor. Instead of direct visual or manual measurement, the system transmits radar signals through the radar cover and grille to detect mounting position and angle indirectly. This intermediary approach allows precise detection of assembly errors that would be invisible to manual inspection methods.
3Productivity
If radar inspection is performed late in the production process, then earlier production steps can proceed quickly, but correction becomes more difficult and time-consuming
Solution Approach 1:
The patent applies self-service by enabling the radar sensor to self-diagnose and self-correct its mounting errors. The inspection system detects the actual mounting position and angle, calculates the deviation from the correct position, and automatically adjusts the sensor's mounting angle to compensate for the error. This automated self-correction eliminates the need for manual rework and can be performed quickly at the end of the production line.
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
Improves recognition accuracy and precision of the radar sensor, enhancing the performance of ADAS by correcting assembly errors and reducing workload on inspection lines.
Implementation Method 1
a scan portion configured to photograph the radar sensor at a plurality of scan positions using a terahertz wave
Implementation Method 2
a conventional radar is mounted in a bumper of the front portion of the vehicle, and transmits and receives a radar signal through a radar cover formed on the grille
Data Source
AI summary
The present disclosure provides a system and method for a vehicle radar inspection. A system for inspecting an assembled state of a radar sensor mounted in a vehicle may include a center portion configured to align the vehicle to a reference inspection position; a mobile terminal configured to connect with an external source of communication; a scan portion configured to photograph the radar sensor at a plurality of scan positions using a terahertz wave; and a server configured to match a plurality of scan images photographed by the scan portion, to detect a three-dimensional coordinate of the radar sensor, to transmit a sensor correction value through the mobile terminal, wherein the sensor correction value is determined based on an assembly tolerance that compares with a design plan of the vehicle, and to correct a sensor angle value of the radar sensor.