Design And Implementation Of Tele-explosive Communication System

Remote explosion system is an important equipment in petroleum exploration that mainly used for the excitation of the seismic source and the start of data acquisition.At present,foreign explosive products are relatively mature and commercialized,but there is no commercial remote explosion equipment with independent intellectual property rights in China.In order to meet the needs of localization of remote explosion system,the design and research of the hardware and software of remote explosion system are carried out based on extensive reference to the design and function of foreign remote explosion systems.Part of the circuit has been improved on the hardware and the system function has been realized.The software has also been optimized.Finally,test of the remote explosion system has been completed.Specifically,the main innovative work is as follows:1.Aiming at the project indicators?the functions and performance that the remote explosion system needs to meet,the overall design of the hardware and software of the remote explosion system is carried out.In this overall design,the architecture of hardware is ARM + FPGA.This architecture combines the advantages of operating system available on ARM and a large number of interfaces on FPGA,so that the designed hardware platform is not only convenient for the implementation and upgrade of hardware and software systems,but also has the following advantage:the abundant clock resources on FPGA can improve the time synchronization accuracy between devices;Software can use a combined architecture of multi-process and multi-thread.Different functions are implemented in different threads,and different working modes are implemented in different processes.2.After completing the overall design of the hardware system,some of the hardware circuits are implemented.First,design the circuit frame according to the function.And then select components reasonably according to power consumption and temperature and other indicators.Finally,the circuit is realized by referring to the data sheet of the corresponding component,such as LCD display circuit?backlight circuit?serial port expansion circuit? resistance and voltage measurement circuit,etc.The test result after the realization of the hardware circuit shows that these hardware circuits can work normally and stably.3.On the completed system hardware platform,the functions of the remote explosion system are implemented in software.Because FPGA has rich clock resources and period of ARM-side driver development is long.Therefore,the functions that require high time accuracy or the corresponding driver functions need to be written when they are implemented on the ARM side are implemented on the FPGA,including power supply voltage and detonator resistance measurement functions and audio sending function.At the same time,the operating system can be used on ARM,which facilitates the development and expansion of software,so the rest of the functions are implemented on the ARM side,including the transplantation of linux system,the realization of serial port expansion function,the realization of bluetooth read-write device parameter function,the realization of GPS time service positioning function,the realization of LCD display device parameter function,the realization of software system based on linux operating system.In addition,for the problem of data storage on the remote explosion system,an algorithm for effectively saving data on remote explosion system is also proposed,which solves the problem of data inconsistency and the problem that theoretically unlimited data cannot be saved under limited storage capacity.4.After completing development of system function,this article verifies each function module individually first.By observing the waveform displayed by the oscilloscope and the printing information of the linux system,it is proved that each functional module completed in this article can work normally and stably and meet the project requirement that the measurement error of detonator resistance cannot exceed ±10%.Then the overall test of the remote explosion system is carried out.The test is conducted in a laboratory environment.The test process simulates the oil exploration process in wild.During the test,the software system completed in this paper can run normally and stably.