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由于探测器技术的进步以及电子器件的发展,在过去的几年中,研制星敏感器在以下几个方面取得了重大改进:质量轻,功耗低,使用灵活。Jena-Optronik GmbH公司开发了一种智能模块式星及目标跟踪器,即所谓的恒星及空间扩展目标智能敏感器(SETIS)。研制的重点在于提高敏感器的自适应能力,使其能够满足特殊任务的要求。智能模块式星及目标跟踪器可以产生关于几个天体目标的位置信息,或者可以充当一个导航相机。它敏感的目标可以是星或其他扩展目标(如彗星、行星),也可以二者兼而有之。有时要求对星和其他空间扩展目标同时跟踪,或者在跟踪已探测到的目标时又要求搜索新的目标,针对这些设计要求就需要一个功能很强的由硬件实现的数字信号预处理器。星跟踪系统的预处理器应用了先进的抗辐射专用集成电路(ASIC)技术。在ASIC设计中考虑了星跟踪系统预处理中所必需的全部功能,例如:像元缺陷修正,滤波,在线背景估计,阈值设置,目标探测及提取,像元中心确定等。本文描述了它的技术方案及在SETIS的工程模型上进行的首次测试结果。
Due to advances in detector technology and the development of electronic devices, star sensors have undergone major improvements over the past few years in terms of light weight, low power consumption, and flexible use. Jena-Optronik GmbH has developed a smart modular star and target tracker, the so-called star and space expansion target smart sensor (SETIS). Development of the focus is to improve the sensor’s adaptive ability to enable it to meet the requirements of special tasks. Smart modular stars and target trackers can generate positional information about several celestial targets or can act as a navigation camera. Its sensitive target can be a star or other expansion targets (such as comets, planets), or both. Sometimes it requires the simultaneous tracking of stars and other spatially extended targets, or the search for new targets while tracking detected targets, requiring a powerful, hardware-implemented digital signal preprocessor for these design requirements. Star tracking system preprocessor application of advanced anti-radiation ASIC (ASIC) technology. In the ASIC design, all the necessary functions of star tracking system preprocessing are considered, such as pixel defect correction, filtering, online background estimation, threshold setting, target detection and extraction, pixel center determination and so on. This article describes its technical solutions and the results of the first test conducted on the SETIS engineering model.