CN113884836A - Cable secondary line calibration instrument - Google Patents
Cable secondary line calibration instrument Download PDFInfo
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- CN113884836A CN113884836A CN202111273958.4A CN202111273958A CN113884836A CN 113884836 A CN113884836 A CN 113884836A CN 202111273958 A CN202111273958 A CN 202111273958A CN 113884836 A CN113884836 A CN 113884836A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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Abstract
The invention provides a cable secondary line calibration instrument, which belongs to the technical field of power cable calibration and comprises a host and a slave, wherein the host and the slave are respectively connected with two ends of a cable to be calibrated; the host and the slave comprise machine bodies, wire core wiring modules and wire core display modules; the wire core display module comprises a liquid crystal screen arranged on the machine body; the machine body comprises a first machine body on the host machine and a second machine body on the slave machine; the wire core wiring module comprises a first wiring port arranged on the first machine body and a second wiring port arranged on the second machine body; one end of the cable to be verified is connected to the first wiring port, the other end of the cable to be verified is connected to the second wiring port, information of the cable to be verified is edited through the host computer and sent to the slave computer, and the slave computer receives the information of the cable to be verified and verifies the cable to be verified. The invention can intuitively determine whether the cable to be detected is electrified or not and whether the secondary line of the cable can be calibrated or not, and can quickly and automatically determine the line cores of the secondary line of the cable in large batch.
Description
Technical Field
The invention relates to the technical field of power cable calibration, in particular to a cable secondary line calibration instrument.
Background
In the field of an electric power system, a method commonly adopted in the line calibration work at present is to utilize the on-off of a multimeter (or a lamp) and the assistance of an interphone to perform calibration. The similar products in the current market can only detect whether the lines are smooth or not by adopting a mode of measuring high and low levels to distinguish different lines, but cannot know the name of the line, and cannot effectively identify a live cable, so that certain fault hidden danger can be brought. By consulting and investigating domestic units in the same industry, the fact that most of the units use a universal meter to make and break gears and make and break the spare core on and off is found to determine the correctness of the core. There is no effective means for simply, rapidly and accurately determining the correctness of a plurality of pairs of cable cores in a large batch. The methods are time-consuming, labor-consuming, error-prone and troublesome for engineering construction, and more importantly, the methods are limited by the prohibition of wireless communication in many high-frequency equipment application occasions.
The patent document with publication number CN105606947A discloses a quick secondary cable loop line calibration instrument, which belongs to the field of calibration equipment, and comprises a terminal a and a terminal B, wherein the terminal a and the terminal B are respectively connected to two ends of a secondary loop cable to be tested; the terminal A comprises a pressurization power supply DC1 and n control branches connected in parallel, wherein the n control branches are connected in parallel and then connected with the anode of the pressurization power supply DC1, and the cathode of the control branch is grounded; one end of each control branch is connected with the anode of a voltage supply DC1, and the other end of each control branch is provided with a jointing clamp Ja for connecting any core in the secondary loop cable to be tested; the terminal B comprises n parallel indicating branches, the n parallel indicating branches have the same structure, and each indicating branch comprises a terminal B indicator light Lb and a terminal B forward diode Db connected with the terminal B in series; one end of each indicating branch is grounded, and the other end of each indicating branch is provided with a jointing clamp Jb used for connecting any core in the secondary circuit cable to be tested. Although the line calibration instrument can simplify the line calibration work, namely, the line calibration is completed in a mode of adopting a transmitter-receiver, the receiver can only know whether a certain line is smooth or not, and cannot know the specific name of the line.
The patent with publication number CN208443947U discloses a novel intelligent multifunctional cable calibration instrument based on coding communication, which comprises a host and a slave, the host and the slave are respectively connected to two ends of a multi-core control cable to be tested, a user edits the name of the cable core to be tested on the host side and performs coding processing, then the cable core of the multi-core control cable to be tested is sent to the slave end, the slave can receive the name information of the cable core to be tested, then performs decoding and displays the name of the cable core on the slave screen, the cable calibration personnel display the received name of the cable core on the slave liquid crystal to complete the cable calibration work, and the host and the slave can complete the voice communication function through one wire. The line checking instrument can finish information editing and decoding, but cannot identify high-voltage signals, and has safety risk.
Disclosure of Invention
In view of this, the present invention provides a cable secondary line calibration apparatus.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the cable secondary line calibration instrument comprises a host and a slave, wherein the host and the slave are respectively connected with two ends of a cable to be calibrated; the host and the slave machines respectively comprise a machine body, a wire core wiring module and a wire core display module;
the wire core display module comprises a liquid crystal screen arranged on the machine body;
the machine body comprises a first machine body on the host machine and a second machine body on the slave machine;
the wire core wiring module comprises a first wiring port arranged on the first machine body and a second wiring port arranged on the second machine body;
one end of the cable to be verified is connected to the first wiring port, the other end of the cable to be verified is connected to the second wiring port, information of the cable to be verified is edited through the host computer and sent to the slave computer, and the slave computer receives the information of the cable to be verified and verifies the cable to be verified;
further, the first body comprises a first shell and a first control system arranged inside the first shell;
the first shell comprises an operation keyboard arranged at the lower part of the liquid crystal screen, a sound pickup hole arranged at the lower end of the first shell, a power switch, a charging interface and a voice button, wherein the power switch, the charging interface and the voice button are arranged on the side surface of the first shell.
Further, the second body comprises a second shell and a second control system arranged inside the second shell;
the structure of the second shell is the same as that of the first shell, and the second shell comprises an operation keyboard arranged at the lower part of the liquid crystal screen, a sound pickup hole arranged at the lower end of the second shell, a power switch arranged on the side surface of the second shell, a charging interface and a voice button.
Further, the first wiring port includes a multiplex transmission port, a voice wiring port, and a ground port.
Further, the second patch port includes a multipath receiving port, a voice patch port, and a ground port.
Further, the host machine edits characters through the operating keyboard, displays the information of the cable to be verified on a liquid crystal display, and sends the information to the slave machine;
and the slave machine receives the information of the cable to be verified, verifies the information and displays a verification result on the liquid crystal screen.
In the installation and construction of electrical equipment, the core wires of the multi-core cable are checked according to a design drawing, and registration is confirmed, so that the method is an indispensable construction process before the cables are connected with wires. Most of the similar products can simplify the line calibration work, namely, the line calibration work is finished in a transmitter-receiver mode. One end of the tested cable is connected to the transmitter by using the numbered wire clamp, and then the other end of the cable is identified one by using the receiver. Although the work is simplified, the receiver can only know whether a certain line is smooth, and cannot know the specific name of the line. For example, the receiving end can only display "1" or "2" or "3", and the line name needs to be checked manually. For example, patent publication No. CN201589833U discloses a microcomputer cable calibration device, which includes a host and a slave, where the host includes a first control module, a first human-machine interface module, and a sending module, the slave includes a second control module, a second human-machine interface module, and a receiving module, the first human-machine interface module and the sending module are connected to the first control module through an input/output port bus, the second human-machine interface module and the receiving module are connected to the second control module through an input/output bus, and the sending module is connected to the receiving module. The patent with publication number CN201819962U discloses a line calibration device for an electric power system, and particularly discloses an intelligent cable calibration instrument. The intelligent cable calibration instrument comprises a host and a slave, and is characterized in that: a host processor is arranged in the host, a host display screen, an input keyboard and a plurality of test ports A which are connected with the host processor are arranged on the surface of the host, a signal indicator lamp A is correspondingly arranged at each test port A, a grounding wire and a power adapter socket are arranged on the host, and a battery bin A is arranged on one side of the host; a slave processor is arranged in the slave, a slave display screen, a signal indicator lamp B and a test port B which are connected with the slave processor are arranged on the surface of the slave, and a battery bin B is arranged on one side of the slave.
The reason why the same kind of products cannot know the name of the line is because of the problem of the communication mode. In the field of a power system, an RS232 communication mode is not suitable for cables with large long-distance interference, and 485 communication needs two wires, so that the work of simplifying wire calibration is not met. Therefore, the same kind of products can only judge the line by adopting high and low level pulses, but the transmitted information amount is small. The invention also adopts a high-low level pulse mode for judgment, but increases the transmitted information quantity, and self-defines codes in the invention, thus characters can be transmitted, and the work of line calibration is simplified to the end. Meanwhile, the line calibration instrument can identify high-voltage signals, and if a line calibration person accidentally receives the live cable from the line calibration instrument, the line calibration instrument can buzz by a buzzer to prompt high voltage of a line, so that personnel safety accidents are prevented, and system risks are reduced. The invention can further simplify the work, and not only can know whether the line is smooth or not, but also can know the specific name of the line. The receiving end can know the line name, such as "XTK 01-023", by simply inputting the compiled line name into the transmitter end.
Compared with the prior art, the invention has the following beneficial effects:
the development of the cable secondary line calibration instrument utilizes the highly intelligent and automatic wire core wiring module and the wire core display module, and the wire core wiring module and the wire core display module have communication functions, so that whether a cable to be tested is electrified or not and whether the cable secondary line calibration can be carried out or not can be visually determined, and the wire cores of the cable secondary lines can be rapidly and automatically determined in a large scale.
(1) The cable secondary line calibration instrument can quickly and accurately test whether the fiber core of the cable to be tested is electrified or not and whether the cable secondary line calibration can be carried out or not;
(2) the cable checking instrument can quickly detect short-circuit faults between cables of all the cables, can quickly detect short-circuit between any two wires, and displays the labels of all the short-circuit cables;
(3) the intelligent communication system has the advantages of simple wiring, reliable equipment, high efficiency, convenience in carrying, high intelligent communication, high accuracy, small workload, no need of simultaneous cooperation of multiple persons and high safety;
(4) the correct use of the secondary line core of the cable can be visually and clearly displayed in a large batch to make judgment.
(5) Can discern high voltage signal, if the line school personnel mistake the line school appearance by accident and receive electrified cable, the line school appearance has bee calling organ to cry, and the suggestion has the line high pressure, prevents that personnel's incident from appearing, reduces the system risk.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a cable secondary line calibration instrument according to the present invention.
FIG. 2 is a schematic diagram of the host according to the present invention.
Fig. 3 is a schematic diagram of a first connection port according to the present invention.
FIG. 4 is a diagram of an editable character on a host LCD panel according to the present invention.
FIG. 5 is a schematic diagram of a slave LCD panel receiving characters according to the present invention.
FIG. 6 is a schematic block diagram of the cable secondary line calibration apparatus of the present invention.
FIG. 7 is a high voltage identification schematic block diagram of the host of the present invention.
Fig. 8 is a functional block diagram of serial data reception from a slave according to the present invention.
The meaning of the respective reference numerals is as follows:
1: first body, 2: first connection port, 3: second connection port, 4: second body, 5: first housing, 6: liquid crystal screen, 7: voice button, 8: operation keyboard, 9: sound pickup hole, 10: power switch, 11: charging interface, 12: voice connection port, 13: a ground port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 8 of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Examples
Referring to fig. 1-3 of the specification, the present embodiment provides a cable secondary line calibration instrument,
the cable secondary line calibration instrument comprises a host and a slave, wherein the host and the slave are respectively connected with two ends of a cable to be calibrated; the host and the slave machines respectively comprise a machine body, a wire core wiring module and a wire core display module;
the wire core display module comprises a liquid crystal screen 6 arranged on the machine body;
the machine body comprises a first machine body 1 on the main machine and a second machine body 4 on the auxiliary machine;
the wire core wiring module comprises a first wiring port 2 arranged on the first machine body 1 and a second wiring port 3 arranged on the second machine body 4;
one end of the cable to be verified is connected to the first wiring port 2, the other end of the cable to be verified is connected to the second wiring port 3, information of the cable to be verified is edited through the host computer and sent to the slave computer, and the slave computer receives the information of the cable to be verified and verifies the cable to be verified.
The first body 1 comprises a first housing 5 and a first control system arranged inside the first housing 5;
the first shell 5 comprises an operation keyboard 8 arranged at the lower part of the liquid crystal screen 6, a sound pickup hole 9 arranged at the lower end of the first shell, and a power switch 10, a charging interface 11 and a voice button 7 which are arranged on the side surface of the first shell. The first wiring port 2 is provided at an upper end portion of the first housing 5.
The second machine body comprises a second shell and a second control system arranged in the second shell;
the structure of the second shell is the same as that of the first shell, and the second shell comprises an operation keyboard arranged at the lower part of the liquid crystal screen, a sound pickup hole arranged at the lower end of the second shell, a power switch arranged on the side surface of the second shell, a charging interface and a voice button.
The first patch port includes a multiplex transmission port, a voice patch port 12, and a ground port 13.
The second wiring port comprises a multipath receiving port, a voice wiring port and a grounding port.
With reference to the accompanying drawings of the specification and fig. 4-5, the host machine edits characters through the operation keyboard, displays information of the cable to be verified on a liquid crystal screen, and sends the information to the slave machine;
and the slave machine receives the information of the cable to be verified, verifies the information and displays a verification result on the liquid crystal screen.
As an optimized manner of this embodiment, the first connection port includes 8 transmission ports, and the second connection port includes 8 reception ports, where the 8 th port is a reception port.
Referring to fig. 6 in the specification, each of the first control system and the second control system includes a CPU, and a signal transmitting circuit and a signal receiving circuit connected to the CPU. The CPU adopts an STM32F407VGT6 chip, has 168MHz main frequency and 1MBflash space and has 192KB on-chip RAM.
The first control system and the second control system are both powered by 4000mAH (milliampere) of 8.4V lithium batteries, the endurance time is longer than 24 hours, and the battery management unit is used for realizing management functions of battery charging and discharging and the like, is also used for voltage conversion, and provides a power supply for a digital circuit, an analog circuit and a liquid crystal part.
After the user edits each line name, the CPU presses down a running key, the CPU sends the ASCII code of each loop to the FPGA once through a bus, the FPGA carries out parallel-serial conversion on data, and check bytes are added to the data to be sent to 1-8 output ports.
The slave receives serial data sent by the host through the 8 th port, and the CPU analyzes and verifies the serial data.
As an optimization way of the embodiment, the first control system further comprises a high voltage identification module. Referring to the attached figure 7 of the specification, the high voltage identification schematic diagram of one path is the same as that of the other seven paths, the high voltage identification module comprises a bidirectional optical coupler, resistors RS and Ru, and the RS is connected with an output terminal; the 3 feet and 4 feet of the bidirectional optocoupler are grounded, the 2 feet of the bidirectional optocoupler are connected with the RS, the 6 feet of the bidirectional optocoupler are connected with the Ru and the CPU, and the CPU is connected with the buzzer. Before the cable is aligned, J1 is not closed, serial data and a port are disconnected, if a high-voltage alternating current or direct current signal larger than 50V exists at the port, a TLP184 optical coupler is switched on, VSpy1 is changed into low level, after the CPU detects the low level, the high voltage of the port is judged, the serial number of the port with the high voltage is displayed on a liquid crystal screen, and a buzzer prompts a maintainer to perform wiring inspection. Because the input end of the port is provided with the series resistor RS, the resistance impedance is 20K/2W, and the live cable is connected to the port and cannot influence a live loop. The line checking instrument can detect whether each output port has high voltage before starting testing, if a certain port has high voltage, the J1 relay cannot be closed, and high-voltage alarming is carried out.
Referring to the attached figure 8 of the specification, the second control system further comprises a live detection module, and the live detection principle block diagram of the slave machine is the same as that of the high-voltage identification module of the host machine. The electrified detection module comprises a bidirectional optical coupler, resistors RS1 and RS2, two resistors Ru, an MOS (metal oxide semiconductor) tube and a bidirectional stabilizing tube; the 3 pins of the bidirectional optocoupler are grounded, the 1 pin is connected with the resistor RS2, the 6 pin is connected with the resistor Ru, the D end of the MOS tube is connected with the other resistor Ru, the G end of the MOS tube is connected with the resistor RS1, and the S end of the MOS tube is grounded; the bidirectional stabilizing tube is respectively connected to the D end and the G end of the MOS tube.
The serial data analysis receiving part of the slave machine adopts an MOS tube scheme, if the cable connected to the input terminal of the slave machine is provided with a high-voltage signal, the slave machine can detect that VSpy1 is in a low level, a buzzer of the slave machine can be started, the liquid crystal can prompt a high-voltage danger mark, the MOS is not damaged due to the fact that the GS end of the MOS tube is provided with the bidirectional voltage stabilizing diode, the safety of the slave machine is guaranteed, and in addition, the current limiting resistor RS1 guarantees that the slave machine cannot cause adverse effects on a power transmission line. When the slave receives a normal high level signal, the MOS is switched on, S1 outputs a low level, the slave receives a low level signal, the MOS tube is switched off, S1 outputs a high level, the slave analyzes and verifies data through the monitored high and low level signals, and line name information is displayed on the liquid crystal.
As an optimized way of this embodiment, the first control system and the second control system further include a voice module, an LED lighting module, and the like.
The invention has the following advantages:
(1) the instrument is small and light. Can be "held" on the hand.
(2) The liquid crystal screen can display the line name.
(3) And (5) voice communication.
(4) And (5) short circuit detection.
(5) And (4) LED illumination.
(6) The master and the slave can be switched with each other.
(7) The connection is simple, and the operation is simple.
(8) And prompting the live of the cable.
(9) The lithium battery supplies power, does not need an external power supply, has low power consumption and can be charged.
The invention can be used in a field with a severe environment, wherein the 'field with the severe environment' refers to a field which may have noise, large high-frequency interference and no wireless communication permission, and the traditional line calibration method and other similar products need two persons to carry out voice communication, so that the working efficiency is greatly reduced under the situation. The invention can detect the smooth circuit and know the circuit name even without voice communication because of the circuit name editing function.
The invention can be used by a single person, and the 'single use state' means that only one person is needed by a person for calibrating the cable on the electric field, the person can firstly use the host to connect one end of the cable and edit characters to send the characters, then walk to the other end of the cable, and use the slave to detect the cable one by one, and know whether the cable is smooth and the name of the line from the screen to finish the cable calibration.
In the description of the present invention, it is to be understood that relational terms such as "a," "an," "two," and the like may be used solely to separate one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. Cable secondary line school line appearance, including host computer and follow machine, its characterized in that: the host and the slave are respectively connected with two ends of the cable to be checked; the host and the slave machines respectively comprise a machine body, a wire core wiring module and a wire core display module;
the wire core display module comprises a liquid crystal screen arranged on the machine body;
the machine body comprises a first machine body on the host machine and a second machine body on the slave machine;
the wire core wiring module comprises a first wiring port arranged on the first machine body and a second wiring port arranged on the second machine body;
one end of the cable to be verified is connected to the first wiring port, the other end of the cable to be verified is connected to the second wiring port, information of the cable to be verified is edited through the host computer and sent to the slave computer, and the slave computer receives the information of the cable to be verified and verifies the cable to be verified.
2. The cable secondary line calibrator of claim 1, wherein: the first machine body comprises a first shell, a first bobbin display module arranged on the first shell and a first control system arranged in the first shell;
the first shell comprises an operation keyboard arranged at the lower part of the liquid crystal screen, a sound pickup hole arranged at the lower end of the first shell, a power switch, a charging interface and a voice button, wherein the power switch, the charging interface and the voice button are arranged on the side surface of the first shell.
3. The cable secondary line calibrator of claim 2, wherein: the second machine body comprises a second shell and a second control system arranged in the second shell;
the structure of the second shell is the same as that of the first shell, and the second shell comprises an operation keyboard arranged at the lower part of the liquid crystal screen, a sound pickup hole arranged at the lower end of the second shell, a power switch arranged on the side surface of the second shell, a charging interface and a voice button.
4. The cable secondary line calibrator of claim 3, wherein: the first wiring port comprises a multipath sending port, a voice wiring port and a grounding port.
5. The cable secondary line calibrator of claim 4, wherein: the second wiring port comprises a multipath receiving port, a voice wiring port and a grounding port.
6. The cable secondary line calibrator of claim 5, wherein: the host machine edits characters through the operation keyboard, displays the information of the cable to be verified on a liquid crystal display and sends the information to the slave machine;
and the slave machine receives the information of the cable to be verified, verifies the information and displays a verification result on the liquid crystal screen.
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| CN202111273958.4A CN113884836A (en) | 2021-10-29 | 2021-10-29 | Cable secondary line calibration instrument |
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| CN202111273958.4A CN113884836A (en) | 2021-10-29 | 2021-10-29 | Cable secondary line calibration instrument |
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| CN207281218U (en) * | 2017-08-24 | 2018-04-27 | 国网青海省电力公司检修公司 | A kind of wire |
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