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工业电视系统摄像点和监控点较分散,图像传输距离远。对于工业电视,采用基带传输价比最高。在重工业企业中,各类电气电子设备布置集中,电磁环境非常复杂,实际使用中工业电视视频信号基带传输方式受到电磁辐射干扰的情况较为普遍,干扰对图像观看效果影响较大。根据视频信号频段电磁环境的测试情况,分析采用同轴电缆进行视频基带传输时辐射干扰的产生原理,提出抑制辐射干扰的措施,有十分现实的意义。
Industrial television camera and monitoring points more dispersed, image transmission distance. For industrial television, baseband transmission cost-effective. In heavy industrial enterprises, the layout of various types of electrical and electronic equipment is centralized and the electromagnetic environment is very complicated. In actual use, the baseband transmission mode of industrial television video signals is interfered by electromagnetic radiation, and the interference greatly affects the image viewing effect. According to the testing situation of the electromagnetic environment in the frequency band of the video signal, it is very realistic to analyze the generation principle of radiating interference when using the coaxial cable for video baseband transmission and put forward the measures to suppress the radiation interference.