Radar Antenna Opposite Direction Radiation Occupant Detection
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Solution Overview
Problem
Existing radar apparatuses face challenges in simultaneously detecting occupants in multiple directions within a vehicle, requiring multiple sensors and increasing installation costs due to limited directional radiation capabilities.
Innovation Solution
A radar apparatus that radiates electromagnetic waves in two opposite directions, allowing for simultaneous detection of occupants in front and rear seats using a single unit, with a circuit that processes reflected signals to distinguish and detect targets in both directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple radar apparatuses are installed to detect occupants in multiple directions, then detection coverage is improved, but installation cost and device complexity increase
Solution Approach 1:
The radar apparatus is designed to perform multiple detection functions in opposite directions using a single device. The antenna system can radiate electromagnetic waves in both forward and backward directions, allowing one radar apparatus to replace multiple separate sensors while maintaining comprehensive detection coverage throughout the vehicle interior.
Solution Approach 2:
The invention extends the detection capability from a single direction to multiple opposite directions by utilizing spatial dimensionality. The antenna is configured to radiate electromagnetic waves in opposite directions (front and back), effectively adding directional dimensionality to the detection coverage without requiring additional sensor units.
2Ease of manufacture
If a single radar apparatus is used to detect occupants in multiple directions, then installation cost is reduced, but signal processing complexity increases
Solution Approach 1:
The signal processing is segmented by direction, with the circuit separately processing first reflected signals from the forward direction and second reflected signals from the backward direction. This segmentation allows the system to handle multiple directional detections independently within a single apparatus, reducing overall processing complexity while maintaining comprehensive coverage.
Solution Approach 2:
The circuit acts as an intermediary that receives and processes reflected signals from opposite directions. It distinguishes between first reflected signals and second reflected signals, applying appropriate processing to each direction's data before generating detection results, thereby simplifying the overall signal processing architecture.
3Productivity
If electromagnetic waves are radiated in opposite directions simultaneously, then detection efficiency is improved, but interference between signals may occur
Solution Approach 1:
The electromagnetic wave radiation is segmented by direction and timing. The antenna radiates first electromagnetic waves in the forward direction and second electromagnetic waves in the backward direction as separate, distinct signals. The circuit correspondingly processes first reflected signals and second reflected signals separately, preventing signal interference while maintaining simultaneous detection capability in both directions.
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
Enables cost-effective installation by reducing the need for multiple sensors while accurately detecting occupants in multiple seats, improving detection accuracy and reliability.
Implementation Method 1
an antenna configured to radiate a first electromagnetic wave in a first radiation angle range including a first direction and radiates a second electromagnetic wave in a second radiation angle range including a second direction opposite to the first direction
Implementation Method 2
a circuit configured to detect a first target in the first direction and a second target in the second direction on the basis of a first reflected signal of the first electromagnetic wave and a second reflected signal of the second electromagnetic wave
Data Source
AI summary
A radar apparatus includes an antenna configured to radiate a first electromagnetic wave in a first radiation angle range including a first direction and radiates a second electromagnetic wave in a second radiation angle range including a second direction opposite to the first direction, and a circuit configured to detect a target in each of the first direction and the second direction on the basis of a first reflected signal of the first electromagnetic wave and a second reflected signal of the second electromagnetic wave, which are received by the antenna.