基于毫米波雷达阵列的波测量系统的设计和实施
Zhijin Qiu1, Yunfei Jiang1, Bo Wang1
1State Key Laboratory of Physical Oceanography, Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266001, China.
Sensors (Basel, Switzerland)
|February 13, 2026
概括
高精度的海洋波观测对于海上安全至关重要. 一个垂直两倾的毫米波雷达阵列 (1V2I-MMWRA) 准确地测量了波浪参数,超过了光谱估计,特别是在台风期间.
科学领域:
- 海洋学 海洋学 海洋学
- 遥感技术 遥感技术 遥感技术
- 海洋工程 海洋工程
背景情况:
- 海洋波对海上安全,海上建设和灾害警告有重大影响.
- 准确的,实时的波浪参数观测对于这些应用至关重要.
- 现有技术需要在各种海洋条件下验证可靠性.
研究的目的:
- 评估一垂直两倾毫米波雷达阵列 (1V2I-MMWRA) 实时海洋波观测的性能.
- 为了比较零交叉方法的精度和波浪参数计算的光谱估计.
- 为了验证1V2I-MMWRA系统的可靠性,特别是在极端天气条件下,如台风.
主要方法:
- 利用1V2I-MMWRA系统收集南中国海的波浪位移时间序列数据.
- 估计的关键波参数包括显著波高度,平均波高度,显著波周期和平均波周期,使用零交叉和光谱估计方法.
- 根据空海界面流量浮标和分析的方向光谱验证了系统性能.
主要成果:
- 与光谱估计相比,零交叉方法显示出更高的精度,所有估计的波参数的根-平均-平方误差 (RMSEs) 较低.
- 光谱估计显示偏差增加,特别是在台风事件期间.
- 定向光谱分析表明,峰值频率和功率光谱密度 (PSD) 随着台风的强度而加剧,波浪方向与现场测量密切匹配.
结论:
- 1V2I-MMWRA系统是高度可靠的观测海洋波的参数,即使在极端条件下,如台风.
- 使用这种雷达阵列,零交叉方法对波参数估计更为精确.
- 1V2I-MMWRA具有低功耗和易于部署的优势,用于海洋观测.
相关概念视频
02:12The Wave Nature of Light
61.7K
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
61.7K
01:10Wave Parameters
9.4K
The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...
9.4K
01:07Reflection of Waves
4.7K
When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...
4.7K
01:20Half wave rectifier
2.5K
A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
2.5K
01:22Full wave rectifier
2.8K
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
2.8K
01:23Brain Waves
4.2K
Brain waves are electrical signals generated by the neurons in the brain, which are regularly monitored to measure mental activities. Brain waves and their frequency ranges can be measured using an electroencephalogram or EEG. There are four main types of brain waves, each with distinct characteristics:
4.2K