Radar Signal Control via Angular Power and Pulse Width Adjustment
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Solution Overview
Problem
Conventional radar systems face challenges in effectively displaying weak echoes and responding to radar beacons due to fixed transmission power and pulse width, which leads to increased noise and degraded detection accuracy.
Innovation Solution
A radar apparatus that adjusts transmission signal power and pulse width based on the target object's location, allowing for differentiated transmission within specific angular ranges to emphasize weak echoes and prevent noise interference, while using non-modulated pulses to avoid interfering with nearby wireless equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the reception gain is increased to observe weak echoes, then the target object is displayed clearly, but the noise increases and the viewability of the image degrades
Solution Approach 1:
The patent applies local quality by differentiating transmission signal parameters based on angular direction. Specifically, the transmission power and pulse width are adjusted according to the target's angular position, allowing optimized signal characteristics for each directional sector rather than using uniform parameters across all directions.
Solution Approach 2:
The patent implements parameter changes by dynamically modifying transmission power and pulse width based on detected target characteristics and angular position. The system changes these parameters in response to target detection results, enabling adaptive optimization of signal strength and duration to enhance weak echo detection while controlling noise levels.
2Reliability
If the pulse width of the transmission signal is shortened to obtain radar beacon response, then the beacon response can be obtained, but the detection accuracy of the target object significantly degrades
Solution Approach 1:
The patent applies segmentation by dividing the transmission signal into different pulse width configurations based on angular ranges. Different angular sectors are assigned different pulse widths - longer pulse widths for general target detection and shorter pulse widths for radar beacon response - allowing both functions to coexist without mutual interference.
Solution Approach 2:
The patent implements dynamics by making the pulse width adjustable and changeable based on the detected target type and angular position. The system dynamically switches between different pulse width settings according to operational requirements, enabling adaptation between detection modes for different target types.
3Area of stationary object
If the transmission signal is transmitted to all directions, then complete coverage is achieved, but the transmission power is wasted in directions where obstacles constantly exist
Solution Approach 1:
The patent applies local quality by assigning different transmission characteristics to different angular directions. Directions with constant obstacles are assigned reduced or zero transmission power, while directions without obstacles receive full transmission power, optimizing energy utilization based on local environmental conditions.
Solution Approach 2:
The patent implements partial action by transmitting signals only in necessary angular directions rather than omnidirectionally. The system determines the minimum required angular coverage based on obstacle detection and transmits only within those angular ranges, avoiding unnecessary energy expenditure in directions where transmission is ineffective.
Data Source
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AI summary
Provided is a radar apparatus (1) capable of suitably transmitting a transmission signal according to a target object existing around the radar apparatus (1), and suitably displaying one of the target object therearound, a response signal of a radar beacon etc. The radar apparatus (1) includes a determining module (22, 24b, 54, 28) configured to determine one of a target object and an area, an angular range setting module (25) configured to set an angular range centering on the position of the radar apparatus (1) to include the one of the target object and the area determined by the determining module (22, 24b, 54, 28), and a transmission signal controlling module (27) configured to change a waveform of the transmission signal to be different between a direction within the angular range and a direction outside the angular range.