Positioning and information transmission method of hydrological monitoring device in signal-free area

A positioning and information transmission method of a hydrological monitoring device in a signal-free area, comprising:

• step 1:
• acquiring, by a data acquisition device flowing down along a water flow in a signal-free area in a tunnel or river channel, information about water level, water quality and waves through a sensor carried by the data acquisition device;
• step 2:
• denoising the acquired information by using an algorithm model and filtering out data, and storing the data;
• step 3:
• arranging, in the signal-free area, magnetic beacons based on a coverage area of a single magnetic beacons and physical features of the signal-free area in the river channel or tunnel affecting magnetic-beacon placement;
• step 4:
• triggering, in a case that the hydrological monitoring device enters a coverage area of a magnetic beacon, a communication protocol between the hydrological monitoring device and the magnetic beacon, recording position information and time information of the hydrological monitoring device, and repeatedly performing step 4 in a case that the hydrological monitoring device enters a coverage area of a next magnetic beacon;
• step 5:
• transmitting, based on a wireless communication protocol between the magnetic beacon and the hydrological monitoring device, position information and time information that are recorded by different magnetic beacons, and obtaining dynamic position information of the hydrological monitoring device based on a principle of time difference of arrival;
• step 6:
• integrating, by a data processing module carried by the hydrological monitoring device, the time information, the position information, and the acquired information about the water level, the water quality and the waves to obtain an integrated information, packaging, and transmitting the integrated information to the magnetic beacon;
• and
• step 7:
• dividing methods for connecting the magnetic beacons with a backend terminal into a wired transmission method and a wireless transmission method, and transmitting the integrated information transmitted by the hydrological monitoring device to the backend terminal, to realize positioning and information transmission of the hydrological monitoring device in the signal-free area.