Stationary Radar Azimuth Resolution and Movement Detection
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Solution Overview
Problem
Current radar systems require multiple systems to detect both slow and rapid movements in terrain, such as interferometry radar for slow movements and Doppler radar for rapid events, which is complicated and lacks synergy, with independent measurement results that cannot be easily correlated for improved prognosis accuracy.
Innovation Solution
A stationary radar apparatus that includes multiple stationary transmitting and receiving antennas, along with a control and evaluation unit, which generates frequency-modulated signals to emit primary radio waves. This system determines Doppler shifts and speeds from successive primary radio wave chirps and achieves azimuth-resolved data sets by comparing receiving signals from different antennas, allowing for the detection of both slow and rapid movements in a single system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If interferometry radar systems are used to detect slow movements in terrain, then measurement precision for slow movements is improved, but the system cannot detect rapid movements in real time
Solution Approach 1:
The patent combines interferometry radar and Doppler radar into a single integrated system. The radar device includes both interferometry measurement units for slow movement detection and Doppler measurement units for rapid movement detection, allowing simultaneous operation of both measurement modes to resolve the contradiction between detecting slow movements with high precision and detecting rapid movements in real-time
Solution Approach 2:
The integrated radar system performs multiple functions: it can detect both slow terrain movements (interferometry mode) and rapid events like avalanches or rock falls (Doppler mode) using the same hardware platform. The system universally handles different measurement types through a unified signal processing architecture that processes both interferometry and Doppler data
2Adaptability or versatility
If two separate radar systems (interferometry and Doppler) are operated independently to detect both slow and rapid movements, then detection capability for both movement types is improved, but device complexity increases
Solution Approach 1:
The patent merges interferometry radar and Doppler radar into one integrated device. The system uses a single antenna system, shared signal processing hardware, and unified control architecture to perform both interferometry and Doppler measurements, thereby reducing device complexity while maintaining versatility in detecting both slow and rapid movements
Solution Approach 2:
The radar system is designed as a universal platform that can perform multiple measurement functions. The same hardware infrastructure supports both interferometry mode for slow movement detection and Doppler mode for rapid event detection, eliminating the need for separate independent systems and reducing overall complexity
3Adaptability or versatility
If two separate radar systems are used to detect slow and rapid movements, then measurement capability is improved, but loss of information occurs since measurement results are independent and cannot be correlated
Solution Approach 1:
By integrating interferometry and Doppler measurements in a single radar system, the patent enables direct correlation between slow movement data and rapid event data. The unified system captures both measurement types simultaneously from the same terrain area, allowing information fusion and cross-validation that prevents loss of information between independent measurements
4Measurement precision
If interferometry radar systems are used for slow movement detection, then measurement precision for slow movements is improved, but productivity decreases since individual recordings take quite some time
Solution Approach 1:
The radar system uses periodic chirp signal transmission with frequency modulation. By transmitting a sequence of chirps and processing them through FFT operations, the system achieves high-resolution range and azimuth measurements while maintaining efficient periodic operation that improves productivity compared to traditional single-recording interferometry methods
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 system enables real-time detection of rapid movements such as avalanches and rock falls, while also providing high-resolution imaging of the terrain and detecting slow movements, all with a single stationary radar apparatus, improving prognosis accuracy and reducing the complexity of operating multiple systems.
Implementation Method 1
the emitting of first sequences of in each case a plurality of first successive primary radio wave chirps by way of precisely one of the transmitting antennae and from a temporal development of at least one corresponding first receiving signal to determine a Doppler shift and/or speed
Implementation Method 2
the control and evaluation unit is configured to generate a frequency-modulated emitting signal, which initiates the transmitting antenna or in each case at least one of the transmitting antennae into emitting primary radio waves
Data Source
AI summary
A stationary radar device, which apart from a plurality of stationary receiving antennae, includes a plurality of stationary transmitting antennae for emitting primary radio waves. A frequency-modulated emitting signal is generated in two sequences. During the first sequences a plurality of successive first chirps are emitted by one of the transmitting antennae. A Doppler shift or a speed is computed from the temporal development of the respective first receiving signals. The second sequences are intermitted with the first sequences and each include one or more second chirps, wherein the second chirps are produced from different transmitting antennae. The second receiving signals which are effected by the second chirps are evaluated, in order by way of correlation of receiving signals that originate from second chips, which come from different transmitting antennae, to obtain a phase picture that is resolved in the azimuth.