硬X射线低能探测器FPGA仿真测试与数据传输系统的研制

发布时间：2018-06-13 03:05

本文选题：FPGA + 数据传输系统　；参考：《云南大学》2015年硕士论文

【摘要】：硬X射线调制望远镜(HXMT)是我国自主研发的用于外星系X射线波段信息探测的空间望远镜,采用X射线低能段、中能段和高能段的信号直接调制成像。本文针对低能探测器的机箱和电控箱的各模块软件的功能进行了仿真测试研究。同时,研制了专门的数据传输系统,用于在探测器机箱研制阶段进行数据传输。所进行的工作和结果如下： 1、对低能探测器的机箱与电控箱的FPGA程序进行了全面软件测评。测试平台为Libero IDE9.1及内置的Modelsim仿真软件。测试结果表明软件功能基本符合要求。探测器机箱主要功能为采集CCD事例数据、配置DAC与探测器驱动以及配置工作参数等。而电控箱主要功能为接收探测器数据并整理上传、接收指令并注入探测器机箱等。经测试发现探测器机箱的配置探测器驱动的配置时序不符合要求。分析研究后给出了修改方案,经修改后的软件配置驱动功能符合要求。 2、设计了数据传输系统的硬件模块与软件模块。硬件方面,电路采用FPGA作为主控芯片,由于FPGA的并行处理特性,系统实现了高速处理能力。为了保障信号传输的高可靠性,采用低电压差分信号(Low-Voltage Differential Signaling, LVDS)传输模式作为与探测器机箱通信的方式,这是由于LVDS具有这种具有共模抑制能力的I/O技术,可实现高噪声抑制能力。软件方面,程序采用VHDL硬件描述语言编写,实现了能量事例数据及状态量的接收、打包和上传,指令接收及注入,时钟输出等功能。并对程序功能进行了仿真测试,测试结果表明程序可正确完成预期功能。 3、对数据传输系统进行了测试。将程序写入FPGA后进行测试,测试结果表明系统可以正确完成数据传输任务。对数据传输系统供电后,电源模块输出电压稳定,FPGA和LVDS模块均工作正常。可长时间正确的进行科学与工程数据以及温度数据的采集,以及正确接收上位机指令并通过LVDS数据线发送。
[Abstract]:HXMTS (hard X-ray Modulation Telescope) is a space telescope independently developed in China for the detection of X-ray information in the outer galaxies. It uses the signals of low, middle and high energy bands to modulate the images directly. In this paper, the function of each module software of low-energy detector's chassis and electronic control box is simulated and tested. At the same time, a special data transmission system is developed, which is used to transmit data during the development phase of detector chassis. The work and results are as follows: 1. The FPGA program of the low energy detector chassis and the electronic control box is evaluated. The test platform is Libero IDE 9.1 and the built-in Modelsim simulation software. The test results show that the function of the software basically meets the requirements. The main functions of the detector box are to collect CCD case data, configure DAC and detector driver, and configure working parameters. The main functions of the electronic control box are receiving detector data and uploading, receiving instructions and injecting detector chassis. The test results show that the configuration timing of detector drive does not meet the requirements. After analysis and research, the modified scheme is given. The software configuration driver function after the modification meets the requirements. 2. The hardware and software modules of the data transmission system are designed. In the hardware aspect, FPGA is used as the main control chip. Because of the parallel processing characteristic of FPGA, the system realizes the high speed processing ability. In order to ensure the high reliability of signal transmission, Low-Voltage differential signaling (LVDS) transmission mode is adopted as the mode of communication with the detector chassis, which is due to the fact that LVDS has this kind of I / O technology with common mode suppression ability. It can achieve high noise suppression ability. In software aspect, the program is written with VHDL hardware description language, which realizes the functions of receiving, packing and uploading energy event data and state quantity, receiving and injecting instruction, and clock output. The program function is simulated and tested. The test results show that the program can fulfill the expected function correctly. 3. The data transmission system is tested. The program is written into FPGA and tested. The test results show that the system can complete the data transfer task correctly. After supplying power to the data transmission system, the output voltage of the power module is stable and the FPGA and LVDS modules are working normally. It can collect scientific and engineering data and temperature data correctly for a long time, and receive instructions from upper computer correctly and send them through LVDS data line.
【学位授予单位】：云南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN919.3;TN791

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