Display And Control Software Design Of Multi-channel Analog Circuit Parameters Automatic Measurement Systems

Multi-channel signal conditioning circuit is one of the major portion of the water in the acoustic equipment, complete hydrophone is amplified and filtered output signal, the weak signal into a signal suitable for the measurement. The merits of the technical parameters of the signal conditioning circuit seriously affect the performance of underwater acoustic equipment, in order to correct, high-precision,quick and reliable assessment of parameters of signal conditioning circuits, requires development of multi-channel analog circuit parameters automatic measurement system,this paper is to such a display control software system development.Software development is inseparable from the hardware platform support. To receive and collect data to DSP -based processing chip, high-speed communication interface with the computer via USB2.0 complete instructions; multi-channel analog circuit parameters automatic measurement systems to FPGA hardware platform based control chip, the completion signal generation, acquisition upload. Among them, the accuracy of the DAC is 14, the maximum switching frequency is 20MHz.Display and control software will use and language development, and runs on Windows operating systems. This paper first studies of multi-channel analog circuit parameters automatic measurement workflow system, whereby the design of software modules, the next analysis software parameter measurement methods used.The software includes parameter configuration module,data reading module,data management module, functional scheduling module, data processing module, data display module and report generation eight functional modules. Software to coordinate multi-channel analog measurement circuit parameters automatic measurement system, and the results in graphical and text presented to the surveyor.Measurements include amplification gain, consistency and isolation between channels and so on.Finally, the development of software for a comprehensive functional verification,given the system of testing and data analysis,test content amplification gain consistency magnitude , phase coherence , channel isolation ,signal to noise ratio and harmonic distortion indicators. The automatic measurement results are compared with manual measurements to verify the correctness of the results calculated by the software. In addition, the software fully functional, high level of automation and stable operation.