Long-distance broadcast line detection device

Abstract

A long-distance broadcast line detection device disclosed by the long-distance broadcast line detection device comprises a boost module, a line switch module, a detection bias module, a detection switch module, a detection acquisition module and a master control module, the boost module is connected with a broadcast line through the line switch module, the detection bias module is connected with the broadcast line through the detection switch module, the output end of the detection switch module is connected with the input end of the detection acquisition module, and the output end of the detection acquisition module is connected with the main control module. According to the invention, the circuit switch module and the detection switch module drive the broadcast circuit and the detection circuit to be in an open-circuit state during non-operation, so that the circuit is prevented from generating induced electromotive force under the interference of an electromagnetic field and threatening the safety of broadcast equipment.

Description

technical field [0001] The invention relates to the field of public broadcasting, in particular to a long-distance broadcasting line detection device. Background technique [0002] Currently, methods for detecting public address lines include carrier detection, impedance detection, and the like. These detection schemes have a disadvantage: the probability of damage to the components in the detection circuit increases with the increase of the length of the broadcast line, and the detection accuracy is too low, which often leads to misjudgments in the system. Therefore, the length of the existing detectable broadcasting lines is generally within 5 kilometers, and the length of broadcasting lines in some large public places (railway stations, large shopping malls, etc.) often exceeds 5 kilometers, but the frequent replacement of components and the detection accuracy If it is too low, the operation and maintenance cost of the broadcasting system will be too high, and it will no...

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Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a long-distance broadcast line detection device, which can solve the problem that the probability of damage to the components in the detection circuit increases with the increase of the length of the broadcast line, and the detection accuracy is too high. low problem

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