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针对航天电子产品特殊的应用环境,为优化航天仪表产品人机交互方式,研究了基于现场可编程门阵列(FPGA)+数字信号处理(DSP)架构的星载高分辨率红外触摸屏的设计与实现方法。在介绍了星载红外触摸屏系统整体架构的基础上,详细阐述了星载红外触摸屏的硬件设计、FPGA设计、图形用户界面(GUI)设计以及基于拉格朗日插值的DSP算法设计。针对星载红外触摸屏的特殊用途,分析了星载红外触摸屏的可靠性设计;对装配完成后的星载红外触摸屏进行了系统性能测试。测试结果表明,该系统简单可靠、工作稳定、屏幕分辨率高,可以满足航天仪表产品的特殊需求。
Aiming at the special application environment of aerospace electronic products, in order to optimize the human-computer interaction mode of aerospace instrument products, the design and implementation of high-resolution satellite touch screen based on field programmable gate array (FPGA) + digital signal processing (DSP) method. Based on the introduction of the overall structure of the satellite-based infrared touch screen system, the hardware design, FPGA design, GUI design and DSP algorithm design based on Lagrange interpolation are described in detail. According to the special purpose of the satellite-based infrared touch screen, the reliability design of the satellite-based infrared touch screen is analyzed. The performance of the satellite-based infrared touch screen after assembly is tested. The test results show that the system is simple and reliable, stable, high resolution screen, to meet the special needs of aerospace instrumentation products.