Symmetrical double pair communication cable of IP video monitoring system

摘要

A useful model is in the electrical field, which can be used to establish IP video monitoring system and other information systems, and the transmission speed is not more than 100 megabits / second. Communication distance over 100m;The essence of the technical solution is a symmetrical dual pair IP video monitoring cable.From the same single copper conducting core,Step by step rotation in a nearly elliptical shell,Gapless envelope cable,Ring dielectric insulation,At that moment,2. The conductor core of the single wire copper wire is enclosed in the dielectric, and each group is composed of two pairs of turns;Twist step by step in the range,part13-14mm and 15-16mm,A the diameter of the conductive core steam increases to 0.7-0.8 mm. The ratio of the diameter of copper conductor core to the diameter of circular dielectric insulation,And the relative permittivity of circular dielectric insulation material is selected from the wave resistance condition of torque pair.;The implementation of the proposed technical solution will increase the communication distance. In addition to the main results achievedFor IP video observation system, the relative cost of double pair cable and 100 ohm wave impedance is also decreasing.