A real-time online detection device for cables based on microwave technology

Abstract

The invention belongs to the technical field of microwave transmission lines, and provides a real-time on-line detection device for cables based on microwave technology, including: a detection section casing, two coupling structures, two Bragg reflectors and a vector network analyzer. The detection section casing is made of a metal circle A coupling structure is arranged at both ends of the detection section casing, the vector network analyzer is respectively connected to the two coupling structures through coaxial joints, and a Bragg reflector is respectively connected to the other side of the two coupling structures. The present invention obtains its transmission and reflection characteristics through the interaction of the electromagnetic field in the coaxial transmission line formed by the cable product to be tested and the shell of the detection section, and observes the change of its S parameter to deduce the quality change of the product; The real-time monitoring of parameters can obtain accurate judgment of product inhomogeneity, and provide sensitive measurement of inhomogeneity such as dielectric coefficient change, concentricity change, and product defects.

Description

technical field [0001] The invention belongs to the technical field of microwave transmission lines, and in particular relates to a real-time on-line detection device for cables based on microwave technology. Background technique [0002] In the field of cable production, the quality inspection of products is very important, and the contents of inspection include size inspection, material inspection and electrical performance inspection, etc. There are various methods of quality detection, among which the non-contact real-time on-line detection method is especially suitable for large-scale industrial production, and thus has been widely used. More mature non-contact detection methods include optical detection, ultrasonic detection and electromagnetic detection. [0003] At present, in the field of cable product testing, there are mainly three types of practical real-time online testing methods. The first type is the detection equipment based on image processing disclosed i...

AI Technical Summary

Problems solved by technology

The first method, as the most widely used method, can only detect defects on the surface of the sample; the main problem of the second method is that the resolution is not high, and it is difficult to obtain fine images; There are certain security risks

The above three methods generally have problems such as complicated devices, difficult installation and debugging, and limited application range, and these methods cannot detect the dielectric coefficient of the dielectric layer.

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