Radar Displacement Detection Using Reference Member
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Solution Overview
Problem
Conventional radar apparatus systems face decreased detection accuracy due to positional displacement, which complicates the configuration of comparing acceleration sensor detection values between the vehicle body and the radar apparatus.
Innovation Solution
A simple configuration using a reference member, displacement sensor, and determining means to detect positional changes of the radar apparatus relative to the vehicle body, or a connecting member with strain sensors to determine positional changes, allowing direct detection of displacement without complex comparisons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If acceleration sensors are provided on both the vehicle body and the radar apparatus to detect positional displacement, then the detection accuracy can be improved, but the device complexity increases
Solution Approach 1:
The invention extracts the detection function from the radar apparatus itself and relocates it to the vehicle body. By providing the acceleration sensor only on the vehicle body and using the radar apparatus merely as a reference object, the patent eliminates the need for a second sensor while maintaining the ability to detect positional displacement accurately.
Solution Approach 2:
The invention introduces the vehicle body as an intermediary between the sensor and the radar apparatus. Instead of directly sensing the radar apparatus's position, the system senses the vehicle body's motion and combines it with radar image analysis to infer the radar apparatus's displacement, thereby simplifying the overall configuration.
2Reliability
If multiple sensors and comparison mechanisms are used to determine positional displacement, then the reliability of detection can be improved, but the ease of operation deteriorates
Solution Approach 1:
The invention makes the radar apparatus serve dual purposes: it functions both as the detection target and as part of the detection system by providing reference markings. The radar apparatus's own imaging capability is used to detect its positional displacement, eliminating the need for separate detection systems and reducing operational complexity.
Solution Approach 2:
The invention enables the radar apparatus to perform multiple functions simultaneously: it transmits and receives radar waves for object detection, and also serves as a reference object for detecting its own positional displacement through image analysis of its reflected signals.
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 enhances detection accuracy by directly determining positional displacement with a single sensor, reducing the influence of detection errors and simplifying the configuration, while also providing accurate notifications of positional changes to the user.
Implementation Method 1
The displacement sensor detects a displacement of the radar apparatus with respect to the reference member
Implementation Method 2
The strain sensor detects a strain of the connecting member itself
Data Source
AI summary
A determination unit that determines a positional change of a radar apparatus mounted on a vehicle including a vehicle body is provided with a reference member, a displacement sensor and displacement determining means. The reference member is fixed to the vehicle body and disposed such that at least a part of the reference member is adjacent to the radar apparatus. The displacement sensor detects a displacement of the radar apparatus with respect to the reference member. The determining means determines whether or not a position of the radar apparatus has changed with respect to the vehicle body, based on the displacement detected by the displacement sensor.