CN202404191U

CN202404191U - Cable checking device

Info

Publication number: CN202404191U
Application number: CN2012200266919U
Authority: CN
Inventors: 蔡智慧; 杜长军; 李明
Original assignee: Beijing Electric Power Corp
Current assignee: State Grid Corp of China SGCC; Beijing Electric Power Corp
Priority date: 2012-01-19
Filing date: 2012-01-19
Publication date: 2012-08-29
Anticipated expiration: 2022-01-19

Abstract

The utility model provides a cable checking device, for solving the problems in the prior art that the cable checking operation is complicated with low efficiency and low accuracy and is seriously influenced by construction environments. The cable checking device comprises a tester and a feedback device, the tester applies an excitation signal to cable core lines to be tested; after the excitation signal passes through the feedback device, voltage values of two ends of different cable core lines and a common terminal are different, line numbers corresponding to the cable core lines can be determined according to different voltage values. Therefore, the efficiency and accuracy of the cable checking operation are improved, and the cable checking operation is simple and easy and is hardly influenced by the construction environments.

Description

Cable core checking device

Technical Field

The utility model relates to an electrical measurement technical field relates to a cable core line ware especially.

Background

In the construction of the secondary loop control cable of the transformer substation, cable alignment is an important process. At present, the following tools are commonly used for cable alignment: the telephone, the interphone, the universal meter and the like are matched with each other by two or more persons when the line is aligned, the consistent signal of the line is agreed in advance, one person and the other person are matched in a coordinated mode, the construction environment is required to be quiet when the line is aligned, however, noise of many construction sites is high, and the efficiency and accuracy of the line alignment work are greatly limited.

In view of the above problems in the related art, no effective solution has been proposed so far.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cable core line ware to solve among the prior art cable core line operation complicacy, efficiency and rate of accuracy are low, and receive the big problem of construction environment influence.

In order to achieve the above object, according to one aspect of the present invention, there is provided a cable core device.

The utility model discloses a cable core line ware includes: comprises a tester and a feedback device; wherein the feedback device comprises: a plurality of matching resistors which have the same resistance value and are sequentially connected in series; a plurality of numbered jointing clamps and a plurality of bolt crimping terminals, wherein the first end of each bolt crimping terminal is connected with the first end of each matching resistor in a one-to-one mode, the second end of each bolt crimping terminal is connected with the clamp handle terminal of each jointing clamp, and the second end of the resistor with the free second end, which is positioned at the end part, in the plurality of matching resistors in series serves as a common end; the tester is used for measuring the voltage from the free end of each cable core to the common end when each cable core of the tested cable is clamped on the jointing clamp, and determining the label of the jointing clamp corresponding to the free end of the cable core which is clamped and participates in the measurement according to the value of the voltage and the corresponding relation between the preset value and the label of the jointing clamp.

Further, the tester has a test probe for contacting the cable core to apply a voltage to the cable core.

Further, the tester includes: the power supply is connected with the test probe through a resistor and is used for applying voltage to the cable core; the input end of the signal conditioning and A/D conversion circuit is connected with the test probe and used for generating a digital signal according to the measured voltage; the micro-processing circuit is connected with the signal conditioning and A/D conversion circuit and is used for processing the digital signal so as to obtain the wire number of the cable core wire to be measured; and the wire number output circuit is connected with the micro-processing circuit and is used for outputting the wire number of the tested cable core wire.

Further, the wire number output circuit is provided with an LED display circuit, and the LED display circuit is connected with the output end of the micro-processing circuit and is used for displaying the wire number of the tested cable core wire.

Furthermore, the wire number output circuit is provided with a voice prompt circuit which is connected with the second output end of the micro-processing circuit and used for outputting the wire number of the tested cable core wire in a voice mode.

Through the technical scheme of the utility model, adopt the cable core line ware including tester and feedback ware, the tester applys an excitation signal on the cable core line that is surveyed, and this signal makes the different cable core lines different with the voltage value at public wiring end both ends after passing through the feedback ware, confirms the line number that the cable core line corresponds according to the voltage value of difference. The problem of among the prior art cable core line operation complicated, efficiency and rate of accuracy are lower, and receive the construction environment influence greatly is solved, and then improved cable core line's efficiency and rate of accuracy, make the core line become simple easy to operate, and receive the construction environment influence less.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this application, illustrate embodiments of the invention, and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic view of an operating principle of a cable core device according to an embodiment of the present invention;

fig. 2 is a schematic diagram of components of a tester according to an embodiment of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1 is a schematic view of an operating principle of a cable core device according to an embodiment of the present invention, as shown in fig. 1, the cable core device mainly includes: a plurality of matching resistors 11 which have the same resistance value and are connected in series in sequence; a plurality of numbered jointing clamps 13 and a plurality of bolt crimping terminals 12, wherein a first end of each bolt crimping terminal 12 is connected with a first end of each matching resistor 11 in a one-to-one mode, a second end of each bolt crimping terminal 12 is connected with a clamping handle terminal of each jointing clamp 13, and a second end of the resistors with free second ends in the end parts in the plurality of matching resistors 11 in series is used as a common end 15; the tester 14 is configured to measure a voltage from the free end 172 of each cable 171 to the common end 15 when the plurality of cable cores 171 of the cable 17 to be tested are respectively clamped on the jointing clamp 13, and determine the label of the jointing clamp 13 corresponding to the free end 172 of the cable core 171 involved in the measurement according to the value of the voltage and a preset corresponding relationship between the value and the label of the jointing clamp 13, so as to confirm the corresponding relationship between the two ends of each cable core 171.

Tester 14 may have

test probes

181, 182 for contacting free end 172 of cable core 171 of cable 17 and common terminal 15, respectively, to apply a voltage to cable core 171. Fig. 2 is a schematic diagram of components of a tester according to an embodiment of the present invention. As shown in fig. 2, the tester includes: the power supply is connected with the test probe through a resistor and is used for applying voltage to the cable core; the input end of the signal conditioning and A/D conversion circuit is connected with the test probe and used for generating a digital signal according to the measured voltage; the micro-processing circuit is connected with the signal conditioning and A/D conversion circuit and is used for processing the digital signal so as to obtain the wire number of the cable core wire to be measured; and the wire number output circuit is connected with the micro-processing circuit and is used for outputting the wire number of the tested cable core wire.

The wire number output circuit can be provided with an LED display circuit which is connected with the output end of the micro-processing circuit and is used for displaying the wire number of the tested cable core wire. The wire number output circuit can be provided with a sound prompt circuit which is connected with the second output end of the micro-processing circuit and used for outputting the wire number of the tested cable wire in a voice mode.

The signal conditioning and ad conversion circuit of the present invention can be composed of two amplifiers, wherein the a/D converter in the a/D conversion circuit can adopt a serial data converter max 147.

The cable core line ware of this embodiment can also possess and open circuit and short circuit detection function, appears the condition of no signal output of line number circuit in the testing process and can confirm that the cable core line of surveying is the broken string, simultaneously, if the line number output of the many cable core lines of line number circuit has appeared in the testing process is when the same, then can confirm this many cable core line short circuits.

Specifically, when in use, the jointing clamp with the mark is respectively clamped on a cable core wire to be checked, the power supply circuit applies an excitation signal on the other end of any cable core wire through the test probe, the signal enters the feedback device through the cable core wire and the jointing clamp with the mark, passes through the matching resistor in the feedback device and then returns to the tester through the common wiring terminal, the signal conditioning and A/D conversion circuit converts the signal into a digital signal and outputs the digital signal to the microprocessing circuit, different wire numbers corresponding to different voltage values are preset in the microprocessing circuit, the signal of the wire number corresponding to the cable core wire is determined according to the different voltage values, the signal is output to the LED display circuit and the sound prompting circuit through the first output end and the second output end of the microprocessing circuit, the LED display circuit can display the wire number corresponding to the tested cable core wire, meanwhile, the voice prompt circuit can carry out voice announcement in a voice output mode.

The embodiment of the utility model provides an adopt the cable core line ware including tester and feedback ware, the tester exerts an excitation signal on the cable core line that is surveyed, and this signal makes the different cable core lines different with the magnitude of voltage at public wiring end both ends after passing through the feedback ware, confirms the line number that the cable core line corresponds according to the magnitude of voltage of difference. The problem of among the prior art cable core line operation complicated, efficiency and rate of accuracy are lower, and receive the construction environment influence greatly is solved, and then improved cable core line's efficiency and rate of accuracy, make the core line become simple easy to operate, and receive the construction environment influence less.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cable core device is characterized by comprising a tester and a feedback device; wherein,

the feedback device comprises:

a plurality of matching resistors which have the same resistance value and are sequentially connected in series;

a plurality of numbered jointing clamps and a plurality of bolt crimping terminals, wherein the first end of each bolt crimping terminal is connected with the first end of each matching resistor in a one-to-one mode, the second end of each bolt crimping terminal is connected with the clamp handle terminal of each jointing clamp, and the second end of the resistor with the free second end, which is positioned at the end part, in the plurality of matching resistors in series serves as a common end;

the tester is used for measuring the voltage from the free end of each cable core to the common end when each cable core of the tested cable is clamped on the jointing clamp, and determining the label of the jointing clamp corresponding to the free end of the cable core which is clamped and participates in the measurement according to the value of the voltage and the corresponding relation between the preset value and the label of the jointing clamp.

2. The cable core grip of claim 1, wherein said tester has a test probe for contacting a core of said cable under test to apply a voltage to said core.

3. The cable core as claimed in claim 2, wherein the tester comprises:

the power supply is connected with the test probe through a resistor and is used for applying voltage to the cable core;

the input end of the signal conditioning and A/D conversion circuit is connected with the test probe and used for generating a digital signal according to the measured voltage;

the micro-processing circuit is connected with the signal conditioning and A/D conversion circuit and is used for processing the digital signal so as to obtain the line number of the cable core to be measured;

and the wire number output circuit is connected with the micro-processing circuit and is used for outputting the wire number of the measured cable core.

4. The cable core checker according to claim 3, wherein the wire number output circuit has an LED display circuit connected to an output terminal of the microprocessor circuit for displaying the wire number of the cable core to be checked.

5. The cable core checker according to claim 3, wherein the wire number output circuit has an audio prompt circuit connected to the second output terminal of the microprocessor circuit for outputting the wire number of the cable core under test in voice.