Agglomerate fog meteorological radar detection system and detection method thereof

Abstract

The invention discloses a detection system and a detection method for all-weather and all-time detection of sudden agglomerate fog weather on an expressway by using microwave radio frequency signals, and particularly relates to an agglomerate fog weather radar detection system. The system comprises an antenna unit, a microwave link unit and a baseband processing unit; the antenna unit comprises a transmit-receive integrated antenna, a transition assembly and an orthogonalizer; the microwave link unit comprises a receiving and transmitting channel module, a power amplifier module, a frequency control module, a receiving front end and a circulator, and a receiving and transmitting integrated chip is arranged in the receiving and transmitting channel module. The agglomerate fog meteorological target is strong in burstiness, low in reflectivity and difficult to accurately monitor, and particularly lacks all-weather and all-time detection means. The system can work all weather and all day long, is not influenced by external environment change, accurately detects the agglomerate fog target and the vehicle target in the radar detection range in real time, measures the speed of the vehicle, and has the advantages of long detection distance, strong anti-interference capability, high precision and the like.

Description

technical field [0001] The invention relates to the technical field of fog weather radar detection, in particular to a fog weather radar detection system and a detection method thereof. Background technique [0002] Fog weather radar is a kind of radar that uses microwave radio frequency signals to detect sudden fog weather on highways all-weather and all-weather. At present, the monitoring of fog at home and abroad is mainly based on visibility monitoring or optical sensors. There are mainly the following technologies : 1. Transmissive visibility monitoring technology, disadvantages: ① Sensitive to temperature drift or mechanical displacement interference, with large errors; ② Cannot monitor uneven fog (fog); ③ Separate installation and maintenance are difficult. 2. Disadvantages of diffuse visibility monitoring technology: ①The sampling range is small, and the atmosphere is assumed to be uniform; ②Limited by the installation density, it cannot monitor cloudy fog. 3. Camer...

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Problems solved by technology

[0002]Fog weather radar is a kind of radar that uses microwave radio frequency signals to detect sudden fog weather on highways all-weather and all-weather. Monitoring is mainly based on visibility monitoring or optical sensors. There are mainly the following technologies: 1. Transmissive visibility monitoring technology. Disadvantages: ① sensitive to temperature drift or mechanical displacement interference, with large errors; ② unable to monitor uneven fog (group fog) ;③ Split installation and maintenance are difficult

2. Scattering visibility monitoring technology has disadvantages: ①The sampling range is small, and the atmosphere is assumed to be uniform; ②Limited by the installation density, it cannot monitor cloudy fog

3. Camera-type visibility monitoring technology has disadvantages: ① Poor accuracy; ② Cannot work around the clock; ③ Cannot monitor fog

4. Disadvantages of optical radar visibility monitoring technology: ① high equipment price; ② vulnerable to other meteorological environments and strong light interference, and cannot work around the clock

5. Meteorological monitoring station, disadvantages: ①The monitoring range is too wide. Due to the suddenness and locality of the fog, the coverage area of ​​the fog cannot be accurately monitored.

[0003] In summary, the cloudy weather targets have strong suddenness and low reflectivity, making it difficult to monitor accurately, especially the lack of all-weather and all-weather detection means

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