The Development Of MTEM Voltage And Current Logger Software

Multi-channel Transient Electromagnetic method (MTEM) must use high power electric generator for power supply. In order to access the performance of the transmitter, we need to monitor and record the transmitter by the full waveform of voltage and current. This paper mainly introduces the design, development and implementation of the pc computer software.The main achievement of the PC software includes data acquisition,waveform display, data storage, data processing and the other functions. In order to make the system with good stability and interactivity, the entire system also have a calibration system, a log management system, exception handling and interface designing system.This kind of Waveform Recorder use USB(chip model CY7C68013) for data transmission’s communication interface. Transmission mode using the Bulk mode.There are three of the USB ports to send data to the host computer, respectively,high-speed voltage data, high-speed current data, low-speed voltage and current data.The other port sends the control commands from the host computer to the lower computer,which transmits the basic data information and the relay cutting command.The real-time acquisition, waveform display and storage function of the host computer are realized by multi-threading. The signal is used to communicate with each other, and the data cache mechanism is realized by the array. In data acquisition,to ensure that the transmission rate to meet the requirements, the way of reading data is asynchronous.The function of replaying is mainly to realize waveform data open, waveform rendering, related data information display,waveform scaling and other functions.According to the definition of the transmission protocol, from the data we saved can be analyzed out the GPS information and frequency information. The calibration system realized by two modes. One is piecewise calibration system, to determine the interval so as to realize the calibration by different peak value, the other is the default system through a linear function to achieve the function of collecting data correction.The whole system uses the log4net library to realize the whole system log management function, and uses the DotNetBar2 library to realize the page beautification and the style unification function.The software in the windows7 system based on Visual Studio2015 development environment for the.NET, Framework4.5 framework, design and development of the whole software design through the top-down direction,through the demand analysis,function and interface design, code implementation, software testing, system testing,field testing, to achieve the final stage to complete and put into use the whole software.The software has been tested for many times, and it has been found that the problem has been improved, and it can meet the requirements of the project task book,and can ensure the stable operation, continuous data collection and good interactive experience.