CN-121978588-A - 2M coaxial cable detection method, device and equipment

CN121978588ACN 121978588 ACN121978588 ACN 121978588ACN-121978588-A

Abstract

The embodiment of the application provides a method, a device and equipment for detecting a 2M coaxial cable. The method comprises the steps of responding to the operation of single-end detection of a cable to be detected when an initial test result of double-end detection of the cable to be detected represents that the cable to be detected is in a short-circuit state or an open-circuit state, sending a characteristic pulse signal to the cable to be detected, determining the characteristic pulse signal according to a preset pulse peak value, rectangular pulse under a preset pulse width and a unit pulse sequence, receiving a reflected wave signal fed back by the cable to be detected based on the characteristic pulse signal, determining the voltage amplitude of the reflected wave signal according to the reflected wave signal and the load impedance and the characteristic impedance of the cable to be detected, and determining and displaying the detection result of the cable to be detected according to the voltage amplitude of the reflected wave signal. The method is used for achieving the effect of improving the detection accuracy.

Inventors

Cai Zitong
LIU RUIDONG
LIN ZIYUAN
XIE BOTAO
CAI YAQI
HUANG JINHAO
Xiao Lujing
CHEN YUSHENG
CHEN HAOLIN
CHEN JIANDONG
ZENG MAOSEN
ZHENG XUQI
CHEN LIN
XIE QIONGBO
XIE JIAFENG
CAI JIANXIN
LIAO JIAYONG
ZHENG WEIQI
HUANG DANYU
XU KAI
JIANG ZHIDONG
HUANG KAI
SHEN YISHENG
YAN SHIMING
CHEN YEXIN
ZHENG XUDONG
ZHANG HAI
LIN JUNMIN
CHEN LIBIN
GUO XINGYUAN

Assignees

广东电网有限责任公司揭阳供电局

Dates

Publication Date: 20260505
Application Date: 20260116

Claims (10)

1. A method for detecting a 2M coaxial cable, comprising: When an initial test result of double-head detection of a cable to be tested represents that the cable to be tested is in a short-circuit state or an open-circuit state, responding to the operation of single-head detection of the cable to be tested by a user, and sending a characteristic pulse signal to the cable to be tested, wherein the characteristic pulse signal is determined according to a preset pulse peak value, rectangular pulses under a preset pulse width and a unit pulse sequence; Receiving a reflected wave signal fed back by the cable to be tested based on the characteristic pulse signal; Determining the voltage amplitude of the reflected wave signal according to the reflected wave signal, and the load impedance and the characteristic impedance of the cable to be tested; and determining and displaying the detection result of the cable to be detected according to the voltage amplitude of the reflected wave signal.
2. The method according to claim 1, wherein the method further comprises: acquiring an inner core on-off detection result, an outer core on-off detection result and a core shell insulation detection result of the cable to be detected for double-head detection; Determining a three-dimensional judgment matrix of the cable to be tested according to the inner core on-off detection result, the outer core on-off detection result and the core shell insulation detection result; When the inner core on-off detection result or the outer core on-off detection result in the three-dimensional judgment matrix represents disconnection, or when the core shell insulation detection result in the three-dimensional judgment matrix represents disconnection, an initial test result of double-head detection on the cable to be tested represents that the cable to be tested is in a short circuit state or an open circuit state.
3. The method according to claim 2, wherein the method further comprises: applying a detection power supply signal to one end of the cable inner core to be detected; Sampling and detecting the power supply signal at the other end of the cable core to be detected at a preset sampling frequency to obtain a first sampling result; obtaining an inner core on-off detection result according to the current signal and the power signal in the first sampling result; And/or the number of the groups of groups, Applying a detection power supply signal to one end of the outer core of the cable to be detected; Sampling and detecting the power supply signal at the other end of the outer core of the cable to be detected at a preset sampling frequency to obtain a second sampling result; obtaining the outer core on-off detection result according to the current signal and the power signal in the second sampling result; And/or the number of the groups of groups, And obtaining the insulation detection result of the core shell according to the current communication condition between the inner core and the insulation layer or the current communication condition between the outer core and the insulation layer.
4. The method of claim 1, wherein the characteristic pulse signal satisfies: ; Wherein the said Characterizing a preset pulse width The following steps Characterization period The following steps Characterization to Is centered and has a width of Is a rectangular pulse of (2); The said Characterizing a set of equally spaced transient pulse signals, said Representing the position number of each rectangular pulse in the unit pulse sequence, said Is a time variable.
5. The method of claim 1, wherein determining the voltage amplitude of the reflected wave signal based on the reflected wave signal and the load impedance and the characteristic impedance of the cable under test comprises: Determining the reflection coefficient of the cable to be tested according to the load impedance and the characteristic impedance of the cable to be tested; and determining the voltage amplitude of the reflected wave signal according to the reflected wave signal and the reflection coefficient.
6. The method of claim 5, wherein the reflection coefficient satisfies: ; Wherein the said Characterizing a load impedance, an Characteristic impedance is characterized.
7. The method according to any one of claims 1 to 6, wherein determining and displaying the detection result of the cable under test according to the voltage amplitude of the reflected wave signal comprises: when the voltage amplitude of the reflected wave signal is in a first amplitude range, determining and displaying that the detection result of the cable to be detected is in a short circuit state; when the voltage amplitude of the reflected wave signal is in a second amplitude range, determining and displaying that the detection result of the cable to be detected is in a loaded state; when the voltage amplitude of the reflected wave signal is in a third amplitude range, determining and displaying that the detection result of the cable to be detected is in a normal state; When the voltage amplitude of the reflected wave signal is in a fourth amplitude range, determining and displaying that the detection result of the cable to be detected is a state to be detected, wherein the first amplitude range, the second amplitude range, the third amplitude range and the fourth amplitude range are determined according to a preset pulse peak value.
8. The method of claim 7, wherein the first amplitude range is less than or equal to 0, the second amplitude range is greater than 0 and less than or equal to 1.5, the third amplitude range is greater than 1.5 and less than 3.2, and the fourth amplitude range is greater than or equal to 3.2.
9. A 2M coaxial cable testing device, comprising: The single-head detection unit is used for responding to the operation of single-head detection of the cable to be detected by a user when an initial test result of double-head detection of the cable to be detected represents that the cable to be detected is in a short-circuit state or an open-circuit state, and sending a characteristic pulse signal to the cable to be detected, wherein the characteristic pulse signal is determined according to a preset pulse peak value, rectangular pulses under a preset pulse width and a unit pulse sequence; The receiving unit is used for receiving a reflected wave signal fed back by the cable to be tested based on the characteristic pulse signal; The processing unit is used for determining the voltage amplitude of the reflected wave signal according to the reflected wave signal, the load impedance and the characteristic impedance of the cable to be tested; and the display processing unit is used for determining and displaying the detection result of the cable to be detected according to the voltage amplitude of the reflected wave signal.
10. The 2M coaxial cable detection device is characterized by comprising a memory and a processor; the memory stores computer-executable instructions; the processor executing computer-executable instructions stored in the memory, causing the processor to perform the method of any one of claims 1-8.

Description

2M coaxial cable detection method, device and equipment Technical Field The present application relates to the field of cable detection technologies, and in particular, to a method, an apparatus, and a device for detecting a 2M coaxial cable. Background In power communication, the 2M cable is responsible for carrying key services including cross-market protection channels, dispatching data network channels, automation channels and the like, and the joint manufacture needs fine operation to ensure that the welding points are full and firm. The cold joint may cause poor contact between the inner conductor and the cable head, and the irregular shape of the welding point may cause short circuit between the inner conductor and the outer shell, because the 2M cable has a smaller aperture. The existing method uses a universal meter to detect the core wire connectivity and insulation of the 2M cable. Firstly, the universal meter is adjusted to an ohm range, 2M head inner cores at two ends are contacted through a red and black meter pen, the resistance is close to 0 ohm (or a beep is generated), so that the core wire is well communicated, and otherwise, a joint or a cable needs to be checked. Secondly, when the connectivity of the shielded wire is checked, the meter pen contacts the shells at the two ends, the normal resistance is close to 0 ohm, and otherwise, the broken circuit is required to be repaired. And finally, testing the insulativity of the core wire and the coil, wherein the meter pen is respectively arranged between the inner core and the outer shell, the high resistance value indicates good insulation, and the low resistance value indicates short circuit. However, because the 2M coaxial cable inner core aperture is small, especially the CC3 specification interface, the existing method is easy to cause poor contact and mistouch the shell because the diameter of the probe is larger than the inner core aperture when in use, and the result is inaccurate and different interface types are difficult to adapt, so that the problem of poor detection effect caused by inaccurate detection exists. Disclosure of Invention The embodiment of the application provides a detection method, a device and equipment for a 2M coaxial cable, which are used for achieving the effect of improving the detection accuracy. In a first aspect, an embodiment of the present application provides a method for detecting a 2M coaxial cable, including: When an initial test result of double-head detection of the cable to be tested represents that the cable to be tested is in a short-circuit state or an open-circuit state, responding to the operation of single-head detection of the cable to be tested by a user, sending a characteristic pulse signal to the cable to be tested, wherein the characteristic pulse signal is determined according to a preset pulse peak value, rectangular pulses under a preset pulse width and a unit pulse sequence; receiving a reflected wave signal fed back by the cable to be tested based on the characteristic pulse signal; Determining the voltage amplitude of the reflected wave signal according to the reflected wave signal and the load impedance and the characteristic impedance of the cable to be tested; And determining and displaying the detection result of the cable to be detected according to the voltage amplitude of the reflected wave signal. In one possible embodiment, the method further comprises: Acquiring an inner core on-off detection result, an outer core on-off detection result and a core shell insulation detection result of a cable to be detected for double-head detection; determining a three-dimensional judgment matrix of the cable to be tested according to the inner core on-off detection result, the outer core on-off detection result and the core shell insulation detection result; When the inner core on-off detection result or the outer core on-off detection result in the three-dimensional judgment matrix represents disconnection, or when the core shell insulation detection result in the three-dimensional judgment matrix represents disconnection, the initial test result of double-head detection of the cable to be tested represents that the cable to be tested is in a short circuit state or an open circuit state. In one possible embodiment, the method further comprises: applying a detection power signal to one end of the cable core to be detected; Sampling and detecting a power signal at the other end of the cable core to be detected at a preset sampling frequency to obtain a first sampling result; Obtaining an inner core on-off detection result according to the current signal and the power signal in the first sampling result; And/or the number of the groups of groups, Applying a detection power supply signal to one end of the outer core of the cable to be detected; Sampling and detecting a power signal at the other end of the outer core of the cable to be detected at a preset sampling frequency to obtain a