Radar Sensor Antenna Switching for Lower-Energy Detection
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Solution Overview
Problem
Existing radar sensors in vehicles face challenges in achieving energy efficiency while maintaining effective object detection, particularly in varying operational modes.
Innovation Solution
A radar sensor arrangement with a microcontroller that switches between energy-saving and detection modes, utilizing specific control sequences for transmitting and receiving antennas to minimize energy consumption without compromising temporal resolution or detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radar sensor operates in continuous detection mode with all transmitting antennas activated, then the object detection accuracy and temporal resolution are improved, but the energy consumption increases
Solution Approach 1:
The patent implements periodic action by alternating between energy-saving mode and detection mode in time cycles. During energy-saving mode, fewer transmitting antennas are activated or they remain inactive for longer periods. When detection is required, the system switches to detection mode with full antenna activation. This temporal periodic operation resolves the contradiction by providing high detection accuracy only when needed while reducing overall energy consumption through intermittent operation.
Solution Approach 2:
The system dynamically adjusts its operating state by switching between two predefined modes based on detection requirements. The microcontroller controls the transmitting antennas to be fully active in detection mode for high precision object detection, and partially or completely inactive in energy-saving mode. This dynamic adaptability allows the radar sensor to optimize the balance between measurement precision and energy consumption according to real-time operational needs.
2Speed
If the transmitting antennas are activated frequently to improve detection responsiveness, then the temporal resolution is improved, but the energy consumption increases
Solution Approach 1:
The patent applies periodic action by implementing time-based switching between energy-saving mode with reduced antenna activation and detection mode with full antenna activation. This allows the system to maintain the capability for rapid detection when needed while accepting lower responsiveness during energy-saving periods, thereby resolving the contradiction between detection speed and energy consumption through temporal modulation of operational intensity.
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
The solution achieves significant energy savings in radar sensor operation by reducing antenna activation frequency and power usage, while ensuring minimal latency and maintaining effective object detection capabilities.
Implementation Method 1
Radar technology has been known since the early 20th century. It is based on the principle of emitting electromagnetic waves, receiving the echo of the emitted electromagnetic waves, and evaluating the received signal
Data Source
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AI summary
The invention relates to a radar sensor arrangement (1) for object detection. It comprises: - an antenna arrangement (2) with a receiver circuit (5) having a number of receiving antennas (6A, 6B, 6C, 6D) and with a transmitter circuit (3) having a number of transmitting antennas (4A, 4B, 4C), - a central control circuit (7) with a microcontroller (8). The microcontroller (8) is configured to operate the antenna arrangement (2) in one of at least two predefined different operating modes. The invention also relates to a motor vehicle.