THE IMAGE TRANSMISSION SYSTEM WITH IMPEDANCE TRANSFORMER

摘要

An image transmission system with an impedance transformer is provided to match impedance on an image transmission line by varying impedance matching resistance on a parallel transmission line of a host in the image transmission system from a cleaning robot within an LNG(Liquefied Natural Gas) pipe to the host. An image signal transmission part converts image signals, outputted from a plurality of cameras through a transmission line having the first resistance, into video signals having a type of a parallel transmission signal matched with the second resistance. The first resistor having the second resistance is connected between a ground terminal and a positive video signal line of the image signal transmission part. The second resistor having the second resistance is connected between the ground terminal and a negative video signal line of the image signal transmission part. A variable resistor circuit is connected in series between the positive and negative video signal lines. A receiver is connected between the video signal lines to receive the video signals. An impedance converter includes the third resistor connected between the ground terminal and an output signal line of the receiver.