A cable detection method and device

Abstract

The invention discloses a cable detection method and device. The method includes: generating a signal reflection coefficient diagonal matrix by using the signal reflection coefficient; performing IFFT processing on the matrix; determining the IFFT data time-frequency matrix; using a preset size The window performs frequency interception on the IFFT data corresponding to each signal time point to obtain IFFT data within the preset frequency range corresponding to each signal time point; according to the preset data magnification, the preset frequency corresponding to each signal time point Amplify the IFFT data within the range; obtain the corresponding relationship between the IFFT amplified data and the cable distance; obtain the cable detection result. Use the window of preset size to perform frequency interception on the IFFT data corresponding to each signal time point, prevent the remote detection results from showing noise characteristics, amplify the IFFT data within the preset frequency range corresponding to each signal time point, and compensate for energy loss and improve the accuracy of the detection results.

Description

Technical field [0001] The present invention relates to the field of cable testing, and more particularly to a cable detection method and apparatus. Background technique [0002] With the continuous development of communication technology, the cable is becoming more and more, the cable layout is increasing, in order to ensure normal communication transmission, the cable needs to be regularly detected. Cable detection is mainly measured at one end of the cable detection instrument, thereby discovered whether there is a problem such as connection interruption, poor contact or shielding failure in a few hundred meters, and help cable maintenance personnel quickly positioned to the cable. There is a problem with problems. [0003] Traditional cable detection methods can get normal cable detection results when the cable length is shorter, such as figure 1 The cable detection results showing the results of the cable detection method, the cable detection method can be found that the ca...

AI Technical Summary

Problems solved by technology

[0004] Using the traditional cable detection method, for a long cable, as the cable length increases, the high-frequency part of the signal transmitted in the cable attenuates rapidly, and the data of the high-frequency part can no longer reflect the remote The condition of the cable, and the high-frequency part of the signal at the far end of the cable has been submerged in the noise, and the obtained remote detection results will show noise characteristics

Images