Cable fault positioning system based on frequency response

The invention discloses an algorithm which is applied to a coaxial cable, extracts cable operation state related information through impedance and phase spectrum data analysis and further realizes cable fault positioning, and belongs to the field of cable fault diagnosis. An impedance analyzer is suitable for an integrated solution for effective impedance measurement and analysis of elements and circuits, and has advantages of wide test frequency range, high test precision and the like. However, the method also has inherent defects that on-site testing cannot be realized and external interference is easily caused. On the basis of a generalized orthogonal theory, an integral transformation algorithm based on a kernel function operator is provided, accurate positioning of a cable fault is achieved, the field portable impedance sweep frequency analyzer is designed according to the algorithm, the position of the cable fault can be accurately positioned, and the field portable impedance sweep frequency analyzer is