摄像机工作原理维及修知识介绍.ppt

摄像机工作原理及维修知识介绍 VCC-6588PC 深圳新望明洋电子技术有限公司 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 1、CCD电路部分CA-1 CCD 水平驱动:驱动CCD水平扫描 垂直驱动:驱动CCD垂直扫描 主要作用:驱动感光元件CCD获取光信号,并将光信号输出到处理电路部分 CCD信号输出 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 2、微处理器及DSP处理部分CA-2 主要作用:光信号转换成数字信号及对数字信号进行亮度,色度方面的处理 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 2.1 IC251:CCD信号输入,放大及AGC处理及模拟/数字信号转换 CCD信号输入 AGC信号,时钟,数据输入 主要作用: 这一部分相当于CCD与DSP,CPU与DSP主处理电路之间的桥梁,接收CCD 和CPU发送来的信号,并进行检测,放大,AGC的处理后转换成数字信号给DSP进行处理 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 2.2 IC211三洋DSP主芯片处理部分 DSP处理是三洋摄像机的一大特点,也是三洋摄像机与其他品牌摄像机的最大 区别,其对色度信号及亮度信号的分开处理能使监视效果达到最佳状态 Y/C分离电路 Y信号处理 色彩信号编码处理 内置色彩电 路信号输入 扫描控制器:水平垂直的 扫描信号 线锁定相位信号的输入,并输出给 CCD的垂直驱动电路 外部控制端口 CPU 通讯 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 2.3 IC214:Y/C信号合成及视频阻抗匹配电路 主要作用:将色度信号及亮度信号合成,并通过75欧匹配电路保证输出的信号稳定 视频输出 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 2.4 IC241:微处理器 复位电路 晶震电路:产生5MHZ的信号驱动CPU工作 AGC增益信号输出给IC251 外部控制信号输 出给CPU处理:调 节镜头的光圈值, 以及通过调节可 调电阻改变红色 及蓝色信号的增 益值,外部6个拨码 开关的信号 输出数据给存储器 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 2.5 IC243:数据存储器EEPROM 从微处理器获取 信号并储存 VCC-6585PC调节增益值就是通过改写存储器的数值来完成的 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 3. 外部控制部分CA-3 镜头光圈 调节开关 线锁定同步相 位可调节开关 拨码开关 镜头驱 动部分 红色可 调开关 蓝色可 调开关 主要作用: 通过改变控制信号给CPU,使CPU输出信号给DSP图像处理电路 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 4. 电源部分CA-4 主要作用:是整个摄像机工作的动力供应部分,输入的DC12V/AC24V通过电源部分的 处理,输出15V,7.0V,5V,3.3V,12VDC的电源,保证各部分的正常工作 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 5. 电源电路 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 6.摄像机各主要部分故障的分析 6.1 CCD及CCD电路部分故障 出现的现像: 无图像,黑屏,图像有条纹 6.2 DSP处理器部分故障 出现的现象: 图像亮度,颜色方面有问题,具体表现可能是图象亮度太亮,太暗并 不可调节,颜色混乱不正常,甚至出现彩色变黑白,严重的无图像 6.3 微处理器CPU故障 出现的现像: 摄像机图像偏暗,摄像机拨码开关不起作用,色彩及相位开关不起 作用.摄像机增益不可调 6.4 存储器故障 出现的现像: 所有摄像机的设置在断电后重新上电不起作用 6.5 电源部分故障 出现的现像: 电源指示灯不亮,无图像 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 1. 7. 三洋摄像机实际维修中常见问题及原因 7.1 无图像 故障部分是电源电路,主要原因 室外雷击人为误操作 静电 视频输出部分故障,主要原因 室外雷击 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. THE E