组合式大功率地—井发射系统电流记录器的研制

发布时间：2018-11-15 11:41

【摘要】：组合式大功率地-井发射系统电流记录器是组合式大功率多功能电磁发射系统的子系统部分,主要完成对发射机的电流信号进行采集记录,为了准确记录电流信息,需要对发射电流进行32k Hz和40MHz独立采样,32k Hz采样记录电流和电压的波形信息,40MHz采样记录电流和电压信号的边沿信息,同时需要保证电流和电压的采样精度,采集的时间同步性和低时间漂移特性。电流记录传感器以非接触的方式对发射极电流和电压信号进行采样,操作者通过无线网络进行采集控制和数据传输,同时将高低速两个采样的数据生成文件并存储在SD卡中,文件中除了包含数据信息外还需要加入时间信息,满足后期数据处理的需要。系统设计为了解决大电流、大电压,高低速数据同步采集和高精度、低时间漂移的问题,对电路各个模块等都进行了调研和方案评估,首先传感器是系统是系统性能指标的前提,除了满足基本的指标外选用的传感器可集成性高、安全可靠。ADC电路选择了TI和ADI两家公司生产的数模转换芯片,他们的性能高,方便设计,不需要复杂的外围器件。主控电路采用FPGA+ARM的组合电路,结合FPGA对快速信号处理的优势和ARM丰富的片上接口资源,可以节省我们的设计周期,提高系统的性能。电流记录器还以OCXO设计时钟电路,目的是为整个采集过程提供稳定可靠的时钟源,提高数据采集的精度,降低系统的时间漂移特性。最终设计了由前端高低速电压传感器,高低速电流传感器,高低速ADC采集电路,电源电路,时钟电路,FPGA-ARM核心控制电路,WIFI控制模块,接口电路,以及Surface Pro等硬件设备组成的组合式大功率地-井发射系统电流记录器,电流记录器软件部分利用MFC基础类库编写完成,主要通过网络通信完成对地-井发射机的发射电流及电压进行控制、实时采集、存储、显示和回放,电流记录器完成了系统整体的组装和调试,并进行了基本性能的测试,完成了设计需求。
[Abstract]:The combined high-power ground-well launching system current recorder is the subsystem of the combined high-power multi-function electromagnetic emission system. It mainly collects and records the current signal of the transmitter, in order to record the current information accurately, We need 32 k Hz and 40MHz independent sampling to transmit current, 32k Hz sampling to record the waveform information of current and voltage, 40MHz sampling to record the edge information of current and voltage signal, and to ensure the sampling accuracy of current and voltage. The characteristics of time synchronization and low time drift are obtained. The current recording sensor samples the emitter current and voltage signals in a non-contact manner. The operator collects, controls and transmits the data through the wireless network. At the same time, the data of the high and low speed samples are generated and stored in the SD card. Besides data information, time information should be added to the file to meet the needs of later data processing. In order to solve the problems of high current, high voltage, high low speed data synchronous acquisition and high precision and low time drift, the circuit modules are investigated and evaluated. First of all, the sensor is the premise of the system performance index, besides meeting the basic index, the sensor selected is highly integrated, safe and reliable. The ADC circuit selects the digital-to-analog conversion chip produced by TI and ADI, and their performance is high. Convenient design, no need for complex peripheral devices. The main control circuit adopts the combination circuit of FPGA ARM, combined with the advantages of FPGA in fast signal processing and the abundant on-chip interface resources of ARM, which can save our design cycle and improve the performance of the system. The current recorder also uses OCXO to design the clock circuit, which aims to provide a stable and reliable clock source for the whole acquisition process, improve the accuracy of data acquisition, and reduce the time drift characteristics of the system. Finally, the high and low speed voltage sensor, high low speed current sensor, high and low speed ADC acquisition circuit, power supply circuit, clock circuit, FPGA-ARM core control circuit, WIFI control module, interface circuit are designed. And the combined high-power ground-well launching system current recorder composed of Surface Pro and other hardware equipment. The software part of the current recorder is programmed by the MFC basic class library. The transmission current and voltage of the ground-well transmitter are controlled by network communication, the real-time acquisition, storage, display and playback, and the current recorder completes the whole assembly and debugging of the system, and the basic performance of the system is tested. The design requirements are fulfilled.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.325

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