基于可編程邏輯電路的相機高精度同步信號研究
發(fā)布時間：2019-05-17 14:15
【摘要】：介紹了一種相機曝光控制實時誤差補償外同步信號產(chǎn)生方法。系統(tǒng)由一系列硬件和軟件組成,硬件包括通用GPS接收設(shè)備、信號接收整理模塊和外同步信號相機電平匹配化模塊;軟件包括設(shè)計在可編程邏輯電路中的外同步信號頻率生成與調(diào)整模塊及外同步信號誤差分析與調(diào)整模塊、外同步信號生成模塊及外同步信號相機邏輯匹配化模塊。GPS接收設(shè)備接收衛(wèi)星信號并實時輸出時間B碼,信號接收整理模塊將時間B碼整理成可編程邏輯器件可以接收的電平信號,可編程邏輯器件通過一系列處理模塊生成目標(biāo)相機的外同步信號,隨后外同步信號相機電平匹配化模塊將外同步信號整理成相機匹配的電平信號來控制相機曝光。實踐證明所提方法可以在不添加額外器件的情況下實現(xiàn)相機曝光時間的實時精確控制,將連續(xù)成像的圖像序列在時間上的精度從通常的數(shù)十微秒級提高到單微秒級。
[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.
【作者單位】： 中國科學(xué)院光電技術(shù)研究所;中國科學(xué)院大學(xué);
【分類號】：TN791
，
本文編號：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.
【作者單位】： 中國科學(xué)院光電技術(shù)研究所;中國科學(xué)院大學(xué);
【分類號】：TN791
，
本文編號：2479157
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