Quasi-real-time cable-free network seismograph system based on ultra wide band wireless module

Abstract

The invention relates to a quasi-real-time cable-free network seismograph system based on an ultra wide band wireless module. The system is provided with a display and control central station and multiple groups of acquisition nodes. The display and control central station is provided with a host computer, an ultra wide band wireless module A, an epicenter trigger, an intelligent battery, and a voltage stabilization module A. Each group of acquisition node is provided with a single-chip microcomputer module, an ultra wide band wireless module B, a signal conditioning and data acquisition module, an intelligent battery, and a voltage stabilization module B. All the acquisition nodes are arranged into 14 groups, each group assigns an aggregation node, other acquisition nodes in the group send data to the aggregation node in order, and all the aggregation nodes then send the data to the display and control central station. After being started up, the system can self-organize wireless Internet of Things, and the ultra wide band wireless modules A, B work at 3.1-10.6GHz. The system is small in size, light in weight, low in cost, low in battery power consumption and high in interference resistance. Relative positions of the nodes can be resolved automatically, an error range of the positioning precision is from -1.0cm to 1.0cm, and the synchronization precision is 1[mu]s. The system is suitable for being popularized and applied in the field of geological exploration.

Description

technical field [0001] The present invention relates to a cableless network seismograph system, in particular to a seismograph system that can be used in engineering exploration, petroleum, geology, coal field and other exploration fields, and can synchronously collect, store and transmit artificial or natural seismic data in real time. Quasi-real-time cable-free network seismograph system based on ultra-wideband wireless module. Background technique [0002] Seismic exploration is a technology that uses instruments to observe seismic wave signals on the surface and process and analyze them to obtain underground structure, petrophysical properties and resource information. Instruments that observe seismic waves, including geophones and seismographs, are an integral part of the exploration process. During the underground propagation process of the seismic wave generated by the seismic source, reflection and refraction will occur when it encounters strata with different wave ...

AI Technical Summary

Problems solved by technology

[0007] ⑴. The wireless communication frequency band mostly adopts 2.4GHz, which is susceptible to co-frequency interference due to the widespread application of WIFI;

[0008] ⑵. The communication protocol is complex and needs to run on the main control device with an operating system, and the main control processor needs to be powerful. The disadvantages brought about by this are high cost and high power consumption;

[0009] ⑶. Lack of positioning function, on-site measurement is required; although GPS can be used, the accuracy is poor, although differential GPS can meet the accuracy requirements, but the cost is high, and the amount of equipment for the acquisition node is increased;

[0010] ⑷. Whether it is a wireless sensor network using the TCP / IP protocol or the ZigBee protocol, although it has a networking function, it is more complicated to implement, requires operating system support, and has higher requirements for the main control hardware;

[0011] ⑸. Does not have a synchronization function, and needs to be synchronized by a combination of time service and local clock punctuality, which increases the equipment complexity of the acquisition node, and needs to store a large amount of useless data during the period when the source is not excited (95% is useless data) , higher requirements on storage;

[0012] ⑹. The acquisition nodes of most cable-free storage seismographs cannot return the collected data and working status to the main control computer in real time, nor can they receive the control instructions from the main control computer, and cannot judge the quality of on-site data collection and the status of the instrument

It adopts a three-level network structure of central station + wireless routing station + acquisition station. Each acquisition station is connected to a seismic instrument system with multiple analog geophones. However, this technology has problems such as complex network structure, many devices, and low network transmission efficiency.

[0015] There is also a technology that uses GPS or Beidou positioning, such as the "Low Power Management System and Management Method for Cableless Storage Seismograph" published in China on March 4, 2015, application number: 2014107783271, this technology is preset in the acquisition station The low-power consumption power management module is connected to the single-chip microcomputer, the Beidou module, the acquisition unit, and the GPS positioning unit respectively by the power supply through the switch circuit. It is difficult to control the low power consumption of many seismometers in a large area, but this technology has high costs and increases the amount of equipment unrelated to seismic acquisition (such as handheld terminals, network servers, Beidou host computers) and other problems

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