基于可编程逻辑电路的相机高精度同步信号研究
发布时间：2019-05-17 14:15
【摘要】：介绍了一种相机曝光控制实时误差补偿外同步信号产生方法。系统由一系列硬件和软件组成,硬件包括通用GPS接收设备、信号接收整理模块和外同步信号相机电平匹配化模块;软件包括设计在可编程逻辑电路中的外同步信号频率生成与调整模块及外同步信号误差分析与调整模块、外同步信号生成模块及外同步信号相机逻辑匹配化模块。GPS接收设备接收卫星信号并实时输出时间B码,信号接收整理模块将时间B码整理成可编程逻辑器件可以接收的电平信号,可编程逻辑器件通过一系列处理模块生成目标相机的外同步信号,随后外同步信号相机电平匹配化模块将外同步信号整理成相机匹配的电平信号来控制相机曝光。实践证明所提方法可以在不添加额外器件的情况下实现相机曝光时间的实时精确控制,将连续成像的图像序列在时间上的精度从通常的数十微秒级提高到单微秒级。
[Abstract]:A method of generating real-time error compensation external synchronous signal for camera exposure control is introduced in this paper. The system is composed of a series of hardware and software, including general GPS receiving equipment, signal receiving and finishing module and external synchronous signal camera level matching module. The software includes the frequency generation and adjustment module of the external synchronous signal and the error analysis and adjustment module of the external synchronous signal designed in the programmable logic circuit. The external synchronous signal generation module and the external synchronous signal camera logic matching module. The GPS receiving device receives the satellite signal and outputs the time B code in real time. The signal receiving and finishing module arranges the time B code into a level signal that the programmable logic device can receive. The programmable logic device generates the external synchronization signal of the target camera through a series of processing modules. Then the external synchronization signal camera level matching module arranges the external synchronization signal into the camera matched level signal to control the camera exposure. It is proved that the proposed method can realize the real-time and accurate control of camera exposure time without adding additional devices, and the accuracy of continuous imaging image sequence in time can be improved from the usual ten microseconds to the single microsecond.
【作者单位】： 中国科学院光电技术研究所;中国科学院大学;
【分类号】：TN791
，
本文编号：2479157
[Abstract]:A method of generating real-time error compensation external synchronous signal for camera exposure control is introduced in this paper. The system is composed of a series of hardware and software, including general GPS receiving equipment, signal receiving and finishing module and external synchronous signal camera level matching module. The software includes the frequency generation and adjustment module of the external synchronous signal and the error analysis and adjustment module of the external synchronous signal designed in the programmable logic circuit. The external synchronous signal generation module and the external synchronous signal camera logic matching module. The GPS receiving device receives the satellite signal and outputs the time B code in real time. The signal receiving and finishing module arranges the time B code into a level signal that the programmable logic device can receive. The programmable logic device generates the external synchronization signal of the target camera through a series of processing modules. Then the external synchronization signal camera level matching module arranges the external synchronization signal into the camera matched level signal to control the camera exposure. It is proved that the proposed method can realize the real-time and accurate control of camera exposure time without adding additional devices, and the accuracy of continuous imaging image sequence in time can be improved from the usual ten microseconds to the single microsecond.
【作者单位】： 中国科学院光电技术研究所;中国科学院大学;
【分类号】：TN791
，
本文编号：2479157
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