Battery Management Unit Design In Geophysical Exploration Data Transmission System

Geophysical exploration measures the distribution of Earth's internal structure and resources through geophysical related instruments.A deeper understanding of the internal structure and resource distribution of the Earth enables human beings to predict a series of geological disasters,and at the same time,it can help us discover resources such as oil,natural gas,and ore,which are of great significance to human development.Humans invented a series of methods for geophysical exploration to calculate underground structures.However,with the deeper and more precise requirements for the calculation of the internal structure of the earth,higher density and higher precision sensors must be deployed,making the data acquisition network increasingly large.Multi-channel transient electromagnetic method has a higher spatial sampling rate and has a higher interpretation accuracy for geological space structure,and has become the development trend of transient electromagnetic method.Transient electromagnetic multi-channel extensions pose a series of challenges to the data transmission system,whether it is the command management of a large number of distributed sensors or the transmission of sensor data.In order to solve the problem of direct management of large-scale data acquisition networks by data centers,with the increase in the number of sensors and bottlenecks,a hierarchical distributed central network must be designed to enable the data center to know every detail of the transmission system.There is no need to directly manage all sensor units of the data transmission system.The data center only needs to manage a limited number of subordinate units,and then these subordinate units can manage the entire data transmission network.The laboratory has designed a set of hierarchical distributed data transmission systems based on the requirements of low-power,high data rates and other aspects of geophysical exploration combined with the topology characteristics of transient electromagnetic methods.The system adopts the sub-regional management method for a large number of distributed data acquisition stations,and assigns certain management capabilities to the sub-station line management unit and battery management unit,so that a subordinate management station manages the data acquisition stations of an area,and the data center only It is necessary to manage a limited number of lower-level management stations,making it possible to manage the massive data acquisition stations,and at the same time enhance the system's scalability and reliability.This data transmission system can realize the command management of sensors and the data transmission of sensors.With the expansion of the data transmission system scale,the originally designed power station can no longer meet the requirements of the data transmission system.The data transmission system puts forward new demands on power station reliability,low power consumption,and data rate.This article addresses the new requirements of data transmission systems for power stations in terms of reliability,low power consumption,data rate,etc.,and realizes low-power mode and low-power wake-up function of power stations,enabling power stations at idle time to enter low power consumption.The mode can be awakened at any time,and the power consumption of the low-power mode power station is only about 13%of the original.For the functions that need to fully utilize the bandwidth of the 100 Mbps Ethernet link,a new data transmission mechanism is designed so that the 100 Mbps Ethernet link of the power supply station can realize full-rate transmission.A new acquisition station clock synchronization mechanism was designed for the need to synchronize 150 acquisition station clock frequencies under a single port of the power station.Solved the problem of the failure of the synchronization scheme caused by the increase of serial acquisition stations.And for the characteristics of the power station itself,to meet the power station link detection,abnormal alarm,relay station and other special needs.