本文给出一种基于STM32F03控制电路的替代设计方案.该控制电路可用于实现对具有RS422通信方式的设备进行控制的功能,该电路具有3路RS422通信接口,可同时控制3个不同的设备进行工作.方案采用ARM芯片HWD32F103替代STM32F103,采用接口芯片SM3490替代ADM2582.文章阐述了控制电路的原理及软件控制流程,总结了电路调试过程中出现的问题及解决措施.该电路经过工程验证,具有可靠性高,功能性能良好的特点.该电路选用的器件均为国内研发生产,是基于STM32F103控制电路进行自主研发设计时一个不错的选择方案.

针对传统ViBe算法不能及时反映场景变化,动态场景适应性差等问题,提出一种改进的ViBe算法.改进内容包括:采用随机选取背景样本和24邻域法获取初始背景,可以加速"鬼影"消融;结合大津法(OTSU)和均匀性度量法的平均自适应阈值计算方法,可以提高算法对树叶晃动、水波纹和光照变化等环境的适应性,最大限度保留有效像素;更新阶段引入自适应更新因子,可以有效减少被误判的概率,从而增强算法的鲁棒性;最后通过形态学处理和滤波使目标更加完整.采用标准数据集视频对改进算法进行了测试和对比分析,改进算法相对于KDE算法、GMM算法和传统ViBe算法各项指标均有大幅度提高,精确度分别提高30.44％、40.72％和20.95％,错分比分别降低了43.28％、40.59％和29.43％.

In order to satisfy the requirement that the vehicular electro-optical reconnaissance sys-tem can quickly share target information to relevant auxiliary weapon system real-timely in wild environment,a method for sharing target information of different photoelectric platforms,as well as the error analysis of this method are presented.By introducing the informations such as the attitude angle of auxiliary weapon platform and the attitude angle of EO reconnaissance plat-form,the method can transmit the target information detected by EO reconnaissance system to auxiliary weapon system precisely in real time.In order to verify the correctness of the method, through the modeling analysis,it is concluded that the method can realize the sharing of target information.The error of the method is analyzed by simulation test,results show that the target information after conversion by the method can improve by about 3.5 min terms of accuracy compared with the direct use of the collected target information.

A software correction method is proposed to reduce the tracking position error caused by the gyro temperature excursion in inertial stabilization systems with position loop. The theoretical foundation of the software correction method and the implementation process of the software correction are presented. The verification experiment for the correction method was carried out. The experiment result shows that the correction program can completely correct the excursion in the case of no vibration, and can still correct the excursion in the case of vibration, but with a code error of 1～2.

The root-cause for the synchronous error of multiple axes of the vehicle panoramic sight platform was found after analysis with the geometric method.Since the synchronous error is caused by the windage angle produced in the working process of the optoelectronic platform,the method to correct the angular deviation at any distance is proposed.The experiment for solving the problem was implemented.The experiment indicates that the method is valid.

介绍了基于TMS320DM642的图像处理系统,给出了系统的输入输出及数据处理部分的设计。利用TMS320DM642提供的专用视频端口通过EDMAs传输数据使视频的获取及输出变得非常简单,同时TMS320DM642支持的视频驱动IOM设计模式大大简化了视频输入输出驱动设计的工作量,设计简单、设计周期短,是图像处理系统较为理想的选择。