Background analysis:

Some large buoys are often used in the sea for monitoring, measurement, or early warning functions. However, due to the impact of weather and sight, there are often incidents of boats hitting the buoys, ranging from scratches to severe damage. Therefore, a particularly reliable anti-collision protection early warning device is required for large buoys. In the early morning of June 17, 2017, the collision of the USS Fitzgerald guided-missile destroyer and the Philippine freighter in the Sea of Japan became a hit news worldwide, because the US Navy, as the “old driver” at sea, made such a stupid error on the its most advanced destroyer. In fact, how to avoid the collision of large buoys in the vast sea has become an important research topic, especially when there is no road demarcation lines and traffic lights, and when sailing at night or in bad weather. The large buoy anti-collision device composed of Guochuang Micro-magnetic Basic Sensor Array can work in all-weather and all day with high reliability. When the distance of the ship approaching the buoy reaches the early warning range of the large buoy anti-collision device, it will sound an alarm and flash the warning light as an early warning signal.

Product performance:

Because the large buoy of the composite Guochuang Micro-magnetic Basic Sensor Array can measure the magnetic anomaly information of ships at a long distance, the detection distance can reach several hundred meters. Experiments have shown that the detection range of a 30-ton tug is more than 200m, and that of a 50,000-ton freighter (without load) is more than 800m. (Note: The measured data has not been processed with software algorithms. The measured distance will be longer after being processed.)

Principle:

The magnetic anomaly target contains materials with ferromagnetic characteristics (such as iron, cobalt, nickel, etc.), and the magnetic field strength is inversely proportional to the target distance cube, H∝M/R³. We use Guochuang Micro-magnetic Basic Sensor Array to detect the magnetic anomaly information caused by the ferromagnetic target, and determine whether there is ferromagnetic target according to the corresponding model algorithm.

 

Technical solution:

The large buoy anti-collision early warning device using the composite Guochuang Micro-magnetic Basic Sensor detection array can capture the magnetic anomaly information caused by ferromagnetic ships within a certain range, and send out early warnings through light and sound signals to remind the approaching ships to make avoidance. The system can work normally in various environments such as rain, fog, and snow.

 

The main components of the system:

1. The large buoy anti-collision early warning device is composed of micro-magnetic basic sensor array, communication module, digital signal unit, etc.;

2. The micro-magnetic basic sensor array is installed on the suitable position of the large buoy;

3. Related algorithms include: micro-magnetic basic sensor array calibration, installation error calibration, carrier interference suppression, environmental noise suppression, processing of magnetic anomaly targets small signal, etc.;

4. Network data center: collection of data and information such as micro-magnetic basic sensor array data and magnetic anomaly early warning positioning signals;

5. Terminal console: display the working status of the large buoy anti-collision warning device and early warning information.