KR101803438B1 - Multi Function Cable Tester - Google Patents

Abstract

The present invention relates to multi-functional cable testing equipment. According to an embodiment of the present invention, the multi-functional cable testing equipment comprises: a measuring device unit; a signal transferring unit; a relay board; a monitoring unit; software; and an interface unit. The multi-functional cable testing equipment provides reliability of the testing equipment and convenience of a user testing process.

Description

Multi Function Cable Tester {Multi Function Cable Tester}

The present invention relates to a cable test equipment, and in particular, it is a localization of a multi-cable test equipment including an operation program that provides convenience of the user test procedure, The present invention relates to a multifunctional cable test apparatus capable of performing maintenance through a plurality of functional cables.

In general, all electronic devices constituted by an electrical system are basically made of a cable assembly, which can lead to fatal defects such as a slight defect that the display lamp does not turn on when an electric signal line is broken or a short circuit occurs.

Especially, in the major safety fields such as military weapons system, power plant equipment, railway, airline, etc., strict inspection is performed on the electrical characteristics such as poor insulation condition, continuity, open or short of cable assembly .

The cable test equipment consists of various types of connectors and inspects the connection lines and insulation characteristics of a test object (cable assembly) composed of a plurality of individual wires. 2-Wire Test, 4-Wire Test, Offset Setup and Test, Insulation Resistance Test, Measurement Speed, Test Point and Channel.

The cable test equipment basically tests the continuity of cable, open (short) and short (short) by using resistance test function with digital multimeter, and insulation property test is confirmed by insulation resistance test. This test method has the function of selecting the test reference value because it confirms the insulation performance of the cable by increasing the voltage although the current is low. However, it is the degree of universal technology in the basic test concept or contents.

On the other hand, as for the domestic and overseas technology development trends, the cable test equipment market is divided into the product groups such as high voltage, general purpose, and liver. In the case of cables using special connectors such as trains, military equipment and aircraft, We are supplying tester. Products such as Cablescan (USA), Cablest (Canada), Weetek (Germany), and MK test system (UK) are available as standard products, but most of them are high priced and provide operating screen service have. In addition, it is inconvenient to use with the Windows based text type menu structure and it is impossible to support standard report form of user requirement. In addition, it is impossible to support small resistance measurement in 0.1Ω unit, there is a limitation in history management, and the maintenance cost due to the production of interface cable is burdened. In addition, due to the increase of the contact resistance of the connector due to long-term operation, reliability problems arise, technical support is limited, and the price is high, so it is difficult for small-sized companies to purchase.

In Korea, a small number of companies are developing tailor-made products according to user's requirement, but they are assembled and delivered in the form of customizing to the user demand system by importing all foreign equipment and parts. Especially, since it is produced in order form, it is not expensive and standard test (measurement) equipment.

Therefore, the present invention proposes a multi-function cable test equipment for solving the above problem.

An object of the present invention is to provide a signal transfer unit including a measurement unit connected to an external meter, a CPU mother board for controlling switching of any signal connected to the measurement unit, A monitoring unit for providing an intuitive operation screen to a user through a software operation program, and an operating program for operating and controlling the user-editable cable test equipment in the monitoring unit By configuring an interface unit having a GUI (Graphic User Interface) and having software stored in a Firmware ROM (ROM) and a D-SUB Gender Connector, Test, etc., and reliability of the test equipment is ensured through user test procedure editing function and self-diagnosis function We provide multifunctional cable test equipment for efficient maintenance by supplying standardized test equipments as well as cutting budgets by localizing cable test equipments depending on parts imports.

According to an aspect of the present invention for achieving the above object, there is provided a method for testing a connection between a multi-function cable tester and an insulation resistance test, a load resistance between a CAN communication line mounted inside the cable test equipment, A measuring device unit 100 for measuring a characteristic of a capacitor for a noise filter test and a noise removing test for a test object; And a mother board 210 having a CPU for controlling switching of arbitrary signals by providing a switch for switching (connecting and disconnecting) an arbitrary signal to be connected to the measuring apparatus unit, 200); A relay board (300) controlled by a motherboard having a CPU of the signal transfer unit and composed of a total of 16 groups by combining signals of the test object into four relay sequences; A monitoring unit 400 for providing an intuitive operation screen to a user through a software operation program, a menu configuration and a guidance message according to the operation of the cable test equipment; A software 500 having a graphical user interface (GUI) and storing the operating program for operation and control of the cable test equipment, which can be edited by the user, in a firmware ROM (Read Only Memory) And further includes an interface unit 600 having a detachable D-SUB gender connector 610 to solve the contact resistance of the connection connector due to long-time application of the test equipment. It provides multi-functional cable test equipment.

According to another embodiment of the present invention, the measuring apparatus unit 100 may be configured to measure a connectivity test of the cable test equipment, a load resistance and a diode, a noise filter test on a test object, and a capacitor with a digital multimeter, The connection test is performed by a 2-wire test method which can measure from 0.1Ω to 100MΩ, a 4-wire test method which can measure from 0.01Ω to 1MΩ, and an offset application test which can measure from 0.01Ω to 1MΩ , Where the measurement speed is 5 times per second with the 2-Wire test basis.

According to another embodiment of the present invention, a mother board (Mother Board) 210 having the CPU uses a bus and a connector for a Versa Module Eurocard (VME) capable of mounting up to eight relay boards, , A connection resistance measuring unit of the cable test equipment, an input terminal of the insulation resistance measuring unit, a test channel to which a test cable to be tested is connected, and an operation program of the software stored in a ROM (Read Only Memory) And a control power source (+ 5V) used in the relay board itself is a step-down converter (DC-DC step down converter).

According to another embodiment of the present invention, the relay board 300 may be connected to the operating program of the software by a USB (Universal Serial Bus) communication for quick and accurate operation of the relay board according to a selected test procedure In order to extend the number of test points to 512, it is designed in a slot-type structure that supports 64 points per the relay board. The operation states of the relays are displayed to the user through the operation program of the software And a slot-specific ID is assigned to the slot so that the slot can be tested even if it is mounted in any one of the slots. Thus, the slots are assigned to the motherboard having the CPU of the signal transfer unit and processed.

According to another embodiment of the present invention, the operating program of the software may allow the user to edit the channel information of the test object, the signal name, the reference value, and the error for the convenience of editing the test procedure, Test procedure editing function that allows all editing procedures intuitively on one screen, function to call up test procedure created by user in EXCEL environment, test procedure through net search automatically connected test object And a function of editing a document, a document management function, a security function, a communication setting function, and a self-diagnosis function are set in advance.

According to another embodiment of the present invention, the test procedure editing function on the screen allows the user to add a project in the test setting window, add a test object for each project, select a test type, select a test channel, The test procedure can be modified immediately after the setting test. When all the procedures are edited, the test procedure is stored. The test procedure prepared by the EXCEL can be loaded into the test procedure, In the basic test procedure editing window provided in the Excel environment, a function is provided so that the user can easily edit the test procedure for each corresponding item and then retrieve it from the window. The function is performed only once after the initial test object is added To prevent errors due to misuse, and the storage format is to store the fields as comma-delimited text data (Tex t Data and a CSV (Comma Seperated Value) format, which is a text file. In the test procedure by the NET search function, a test object is selected as a slot connected to the cable test equipment, Can be used to edit the 2-Wire test procedure that automatically searches the connected channel information by the test equipment and automatically creates the contents linked to the basic test edit window. Provides the function of outputting in basic form of Excel form of basic format and saving test result to DB, searching by test object and examination date, checking result, The security function is designed to be as open as possible, in order to prevent an unspecified user from accessing the equipment. And the communication setting function is based on the USB communication method. The communication setting function converts communication into RS-232 and RS-485 from the inside of the equipment and connects to the measurement unit and the relay board, And the self-diagnosis function allows the user to check whether there is an abnormality in the cable test equipment through connectivity, insulation resistance test, communication diagnosis, main board diagnosis and self-diagnosis of the relay board at a desired time do.

The multi-functional cable test equipment of the present invention has the following effects.

In the monitoring section, the operation program for operating and controlling the cable test equipment that can be edited by the user is constituted by a GUI (Graphic User Interface) and stored in a firmware ROM (Read Only Memory, ROM) and a D-SUB gender connector (Gender Connector) is configured,

(1) Connectivity and insulation resistance test according to various cable test equipments can be done. Test equipment editing reliability and self-diagnosis function can ensure reliability of test equipment.

(2) Localization of multi-cable test equipment with built-in operation program that provides convenience of user test procedure has a unique effect to be able to maintain the maintenance through equipment standardization as well as budget reduction by assembly of cable test equipment depending on parts import .

1 is a localized photograph of a multi-function cable test equipment according to a preferred embodiment of the present invention;
2 is an overall block diagram of a multi-function cable test equipment according to a preferred embodiment of the present invention.
3 is a block diagram illustrating a measuring apparatus for a multifunctional cable testing apparatus according to a preferred embodiment of the present invention.
4 is a block diagram illustrating a signal transfer unit for a multi-function cable test equipment according to a preferred embodiment of the present invention.
5 is a diagram illustrating a software operation program and monitoring for a multi-function cable test equipment according to a preferred embodiment of the present invention;
6 is a graphical illustration of a screen of a monitoring unit showing a GUI (Graphic User Interface) screen and a guidance message for a multifunctional cable testing apparatus according to a preferred embodiment of the present invention.
7 is a photograph of a monitoring unit showing a net search function for a multi-function cable test equipment according to a preferred embodiment of the present invention.
FIG. 8 is a photograph of a monitoring unit showing a report management function for a multi-function cable test equipment according to a preferred embodiment of the present invention.
FIG. 9 is a photograph of a real part of a monitoring unit showing a self-diagnosis (look-back) function for a multi-function cable test equipment according to a preferred embodiment of the present invention.
10 is a photograph showing a gender connector for a multi-function cable test equipment according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals refer to like elements throughout. Although the same reference numerals are used in the different drawings, the same reference numerals are used throughout the drawings. The prior art should be interpreted by itself. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 to 10, a technical configuration of a multi-function cable tester according to a preferred embodiment of the present invention includes a measuring device unit 100, a signal transfer unit 200, A board 300, a monitoring unit 400, a software 500, and an interface unit 600.

First, FIG. 1 shows a photograph of a multi-function cable tester which is localized by the present applicant.

2 and 3, the measuring apparatus 100 is a means for measuring (or inspecting) characteristics of a cable test apparatus, such as a connectivity test and an insulation resistance test, The load resistance between the resistance test and the CAN communication line mounted inside the cable test equipment, the diode for anti-reverse voltage, the noise filter test for the test object, and the characteristics of the capacitor for noise removal are measured.

In addition, the measurement apparatus unit 100 measures the connectivity test of the cable test equipment, the load resistance, the diode, and the capacitor with a digital multimeter connected to the outside, and the insulation resistance measures the insulation resistance.

The connectivity test of the cable through the measuring apparatus unit 100 according to the embodiment of the present invention is applicable to a 2-wire test method capable of measuring from 0.1? To 100 M ?, a 4-wire test method capable of measuring 0.01? Offset application test that can measure from Ω to 1MΩ can be done. At this time, the measurement speed can be tested 5 times per second on the 2-Wire test basis.

The 2-wire test method is a general method used to measure a resistance in a tester, in which a current flows through a resistor and a voltage is measured across the resistor. At this time, the resistance value of the lead wire is contacted Since the resistance value is less than several Ω, it can be neglected when measuring a high resistance value, but when measuring a low resistance value, an error may be increased. Therefore, 2-Wire method can be used for measurement of high resistance value, but 4-Wire method or Offset method should be used for measurement of low resistance value.

On the other hand, the 4-wire test method measures the voltage across the resistor by applying a constant current to the resistor. Since the measured voltage has a very high impedance, errors due to line resistance and contact resistance do not occur. More accurate measurement is possible.

However, in the case of executing the 4-wire test method, a line and a voltage for measuring the current flowing through the connector for connecting the MF cable tester according to the preferred embodiment of the present invention are measured instead of the 1: 1 wire The line shall be routed separately in the connector for the connection of the cable under test.

Here, the offset refers to the resistance value of the test object (the connector and the cable in the test equipment) added to the resistance value of the test object when measuring the resistance value through the cable test equipment. That is, the concept is to measure only the resistance value of the test object by canceling the resistance value of the test equipment.

Therefore, in the embodiment of the present invention, when the resistance value of the cable test equipment is measured in a short state at both ends of the cable test equipment connected to the test object, the offset value is usually set to 0.25 ± 0.1Ω. When the measured value is stored in the offset table, the value of B-A is set to the resistance value of the test object.

Also, the load resistance test according to an embodiment of the present invention can measure from 0.1? To 100?, And the diode test can measure the forward and reverse characteristics of a general diode or a zener diode. Capacitor test is polarity type and non-polar type. It is possible to measure from 1nF to 10mF. Insulation resistance test can be selected from DC 25V to 1000V. Dwell time and test time indicating delay time or stabilization time before next command execution after position command It is possible to set the test time.

2 and 4, the signal switching unit 200 is a unit for switching (connecting and disconnecting) an arbitrary signal to be connected to the measuring unit, A mother board 210 having a CPU for controlling switching of arbitrary signals by providing switches for connecting and disconnecting signals of the plurality of cable test apparatuses, And controls the arbitrary signal for the measurement item of the unit 100 to be switched by the signal transfer unit.

In other words, in the measurement apparatus 100, the above-described measurement items, that is, the connectivity test of the cable test equipment, the load resistance, the diode, the noise filter test on the test object and the capacitor are measured by the digital multimeter 110, And controls the connection or disconnection of an arbitrary signal measured by the insulation resistance meter 120 to the signal transfer unit 100.

In order to do this, the signals connected to the respective test objects (digital multimeter, insulation resistance meter) should have a characteristic to be switched very quickly at the signal transfer part. In addition, it is necessary to quickly and accurately control the relays of the mother board having the CPU according to the test procedure by immediate communication with the operation program of the software. In addition, the number of test switches shall be at least 256 to 512 points, and the connection lines required for connection of the equipment (signal transfer part of the multi-functional cable test equipment of the invention) and the test object shall have the minimum possible resistance. Also, it should be made in the form of a slot for maintenance. And each relay card should be used regardless of the slot in which it is installed, and the equipment should perform a self-diagnosis function (look-back test) so that the user can check the equipment immediately.

In addition, in the embodiment of the present invention, a mother board 210 having a CPU capable of mounting eight relay boards in a slot form has been specifically developed, And a relay board (300) having a plurality of test points.

2 and 4, a mother board 210 having the CPU has a built-in bus for mounting up to eight relay boards 300, and the connector has a VME (Versa Module Eurocard) connectors were used. The mother board 210 having the CPU has a function of controlling the connection test of the cable test equipment and the test channel connected to the insulation resistance test input and the test cable to be tested as a main board. That is, the control unit 400 has a communication address at the same level as that of the relay board 300 in order to control the operation program of the software 500 stored in a ROM (Read Only Memory). In addition, the step down converter itself and the control power source (+ 5V) used in the relay board employ a step down converter.

The firmware is a software program stored in ROM (Read Only Memory), which refers to a group of microprograms, and therefore has both software and hardware characteristics. Therefore, it can be said that it is in the middle of software and hardware. Due to these characteristics, some of the functions executed by software or hardware are replaced with firmware. In other words, if the function of the software is changed to the firmware, there is a disadvantage that it is not easy to change the program, but since the speed is increased, programs requiring high-speed processing such as a part for controlling the input / output device in the program operating system tend to be replaced with firmware. Conversely, changing the function of the hardware to firmware is slower but it has more flexibility to change than hardware. Therefore, it is easy to use firmware to make a complete product through trial and error, such as when designing a computer. In recent years, software in ROM (for example, boot loader) has been called firmware. The functions of the operating system used by the firmware are capable of processing interrupts and maintaining various data structures and enabling synchronization primitives to control access to shared data and other resources. There are also sub-word operations, context exchange, procedure call and return sequence to make bit manipulation efficient.

2 and 4, the relay board 300 is controlled by a mother board 210 having a CPU of the signal transfer unit 200 and outputs a signal of the test object 700 Which are controlled by a motherboard having a CPU of the signal transfer unit and are composed of a total of 16 groups by combining signals of the test object into four relay sequences.

In addition, since the relay board 300 has 64 test channels built in one relay board and can support 512 test points when all eight boards are mounted on the main board, a total of 256 testable cables Can be tested at one time. At this time, the connection resistance test of the cable test equipment is designed by measuring the small resistance value, designing the circuit so as to have the minimum possible pattern resistance, performing artwork for PCB circuit design and insulation resistance test at DC 1000V , And the pattern width for each signal point is designed so that insulation can be maintained.

In other words, the relay board 300 according to the embodiment of the present invention is specially manufactured as described below in consideration of the above-described contents.

First, the relay board 300 is designed to operate by communicating with an operating program of the software 500 and a universal serial bus (USB) in order to quickly and accurately operate the relay according to a test procedure selected at a high speed.

Also, the relay board 300 is designed to have a slot-type structure supporting 64 points per the relay board 300 in order to extend the test points to 512 test points.

In addition, the relay board 300 is provided with a communication check function capable of immediately displaying a normal operation state of each relay to the user through an operation program of the software 500, Is configured.

The relay board 300 may be mounted on a backplane board or a mother board 210 having a CPU of the signal transfer unit 200 by providing an ID for each slot in order to enable testing even when the relay board 300 is mounted in any slot. To be processed.

In order to minimize the influence of the pattern resistance, the relay board 300 secures the pattern width of the connection test portion of the cable test equipment as wide as possible and processes the thickness of the pattern to 2 (oz) The internal resistance of the body connectors was optimized to about 0.9 Ω by a self-diagnosis (look-back) test.

In addition, the relay board 300 has a connector for connecting a test object to a D-SUB gender connector for maintenance, thereby minimizing an interface connector and a contact resistance generated when the connector is used for a long time.

Referring to FIGS. 2 and 5, the monitoring unit 400 provides an intuitive operation screen to the user through the operation program of the software 500, the menu configuration and the guidance message according to the operation of the cable test equipment.

Referring to FIG. 2 and FIG. 5, the software 500 includes a graphical user interface (GUI) for operating and controlling the operation and control of cable test equipment that can be edited by the user in the monitoring unit, (Read Only Memory, ROM).

6, if the existing product (imported product) is a simple Windows-based UI (User Interface) method, the operation program for the multifunctional cable test equipment according to the embodiment of the present invention can be used conveniently And a GUI (Graphic User Interface) for providing an intuitive operation screen is provided.

Referring again to FIG. 2 and FIG. 5, the software 500 allows the user to easily edit the test information such as the channel information of the test object, the signal name, the reference value, and the error, . To do this, you have to edit the test procedure to edit all procedures intuitively on a single screen, to load the test procedure created in the EXCEL environment, and to automatically test the test procedure (Correction and recording), an efficient report management function, a security function, a communication setting function, and a self-diagnosis function.

All of the test procedure editing functions on one screen, which is an operation program of the software 500 according to the embodiment of the present invention, include a function of adding a project in a test setting window, adding a test object for each project, selecting a test type, , Test channel name, reference value setting, error selection, and offset can be set. After the basic setting, the test can be performed immediately, and the editing is completed when all the procedures are edited.

The retrieval function of the test procedure created by EXCEL, which is the operation program of the software 500 according to the embodiment of the present invention, allows the user to easily edit the test procedure for each corresponding item in the basic test procedure edit window provided in EXCEL A function is provided that can be called up from a later window. However, this function can be operated only once after adding the initial test object, thereby preventing errors in misuse. The storage format is stored in a Comma Seperated Value (CSV) format, which is a text file in which several fields are separated by commas and a text file.

Referring to FIG. 7, in the test procedure creation by the NET search function, which is an operation program of the software 500 according to the embodiment of the present invention, the user connects a normal test object to the test equipment, After selecting Net Search, the test equipment automatically searches for connected channel information and automatically creates the contents linked to the basic test edit window. However, this feature has been made available for editing the 2-Wire test procedure.

Referring to FIG. 8, the efficiency of report management, which is an operational program of the software 500 according to the embodiment of the present invention, is provided to output the basic report form in EXCEL form of the basic form desired by the user, It can be saved in DB and can be searched by various conditions such as test object, test date bottle, etc., and the result can be checked and output when necessary. It is also designed to be open for users to support the desired format.

The security function, which is an operation program of the software 500 according to the embodiment of the present invention, supports a login function and an administrator mode in order to prevent an unspecified user from accessing the equipment. That is, only registered testers are configured to be able to register the test and output the test results. Only the designated administrator who manages the system can register the tester to use it.

The communication setting function, which is an operation program of the software 500 according to the embodiment of the present invention, is based on the USB communication method and converts communication through RS-232 and RS-485 in the equipment, So that the measured result data can be collected. If the user arbitrarily inserts the USB port in another position, the communication port number should be changed and set again.

In other words, when the program is started by turning on the multi-function cable test equipment according to the embodiment of the present invention, the operation program of the software tries to communicate with the equipment, outputs a communication reset message when a failure occurs, In order to communicate with a computer, you can set up and save the 'COM Port' at the connection point of the computer body to which the serial communication line is connected.

Referring to FIG. 9, the self-diagnosis function, which is an operation program of the software 500 according to the embodiment of the present invention, is a self-diagnostic function for checking self- The self-diagnosis function is performed using the jig.

In the self-diagnosis function according to the embodiment of the present invention, the user can use the equipment while checking the reliability of the cable test equipment, and the result of the self-diagnosis test is also managed as a history, It is possible. In this way, it is possible to immediately identify the cause of an error, so that immediate technical support is possible.

The self-diagnostic test items, which are the operating programs of the software 500 according to the embodiment of the present invention, include a basic communication function through communication with each measurement unit, a function of a standard resistance measurement of 1? In case of connectivity, 100V, 250V, and 500V, and resistance characteristics of channels for all relay cards can be diagnosed.

The self-diagnostic test method, which is an operation program of the software 500, performs self-diagnosis of the connectivity test measurement unit, the insulation resistance test measurement unit, the communication diagnosis, the main board diagnosis, and the relay board.

In the case of the connection resistance measuring part, a 10 Ω 1% resistance is connected between 1 and 2 pins of an arbitrary output terminal # 1 slot and a resistance of 1 Ω 1% and between 3 and 4 pins, If the measured resistance value is within 5%, it is judged as normal and the normal lamp is displayed.

In the case of the insulation resistance measuring unit, the output voltage of the insulation resistance measurement unit is returned from the relay card to the loop, and the function of the connection resistance measurement unit is switched to DC-V to measure the output voltage of the insulation resistance measurement unit returned. If the voltage is measured within ± 10% of the set voltage, the function of the insulation resistance measuring part is judged to be normal.

In the above communication diagnosis, when the communication between the PC and the CableMaster is started within 10 seconds, the normal lamp is turned on for the communication function, and the communication lamp is not turned on if communication is not started within the set time.

The main board diagnosis includes a plurality of relay boards mounted on the mother board. The mother board has a built-in function of the mother board. The relay boards have address numbers of the same level as the boards. The relay board, the connectivity resistance meter, : 1 Controls the relay to be connected. At this time, the relays in the motherboard are connected to each other to test normal operation, and if the normal operation is confirmed, the corresponding lamp is turned on.

In the relay board diagnosis, each relay card has a built-in 64 relays, and a self-diagnosis jig is connected to an external output connector and then tested. Since all the output pins of the relay board are connected in 1-2, 3-4, and 5-6 formulas, they can be diagnosed by using the self-diagnosis jig. When the lamp is normally operated, the corresponding lamp is turned on.

Referring to FIGS. 2 and 10, the interface unit 600 is a means for connecting cables between the cable test equipment and the test object 700, so that the contact resistance of the connector increases as the cable test equipment is used for a long time In order to solve this problem, a detachable D-SUB connector (Gender Connector) 610 is provided and designed to be replaceable after a predetermined period of use.

Referring to FIG. 10, since the gender connector 610 can be separated and replaced, the gender connector 610 is not affected by the generation of contact resistance. Repeated detachment and tightening of the test equipment and interface cable at each test may result in a decrease in tightness between the interface connector and the test equipment connector (increased contact area and frequent discharge or pulsing) . Therefore, in order to solve this problem by replacing the gender when the tightness between the connectors is not normal, the gender between the relay board and the interface cable of the test equipment is adopted, It is possible.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Measuring device part 110: Digital multimeter
120: Insulation resistance meter 200: Signal transfer unit
210: mother board with CPU
300: Relay board 400: Monitoring part
500: software 600: interface unit
610: Gender Connector
700: test object

Claims (6)

A load resistance between a CAN communication line mounted inside the cable test equipment, a diode for preventing reverse voltage, a noise filter test for a test object, and noise (100) for measuring a component characteristic of a capacitor for removing noise;
And a mother board 210 having a CPU for controlling switching of arbitrary signals by providing a switch for switching (connecting and disconnecting) an arbitrary signal to be connected to the measuring apparatus unit, 200);
A relay board (300) controlled by a motherboard having a CPU of the signal transfer unit and composed of a total of 16 groups by combining signals of the test object into four relay sequences;
A monitoring unit 400 for providing an intuitive operation screen to a user through a software operation program, a menu configuration and a guidance message according to the operation of the cable test equipment;
A software 500 having a graphical user interface (GUI) and storing the operating program for operation and control of the cable test equipment, which can be edited by the user, in a firmware ROM (Read Only Memory) Lt; / RTI &
The interface unit 600 further includes a detachable D-SUB gender connector 610 to solve the contact resistance of the connector when the contact resistance of the connector is increased for a long time.
The measurement apparatus unit 100 measures a connection test of the cable test equipment, a load resistance and a diode, a noise filter test for a test object, and a capacitor by using a digital multimeter, and the insulation resistance is measured by connecting an insulation resistance meter,
The connectivity test runs a 2-wire test method that can measure from 0.1Ω to 100MΩ, a 4-wire test method that can measure from 0.01Ω to 1MΩ, and an offset application test that measures from 0.01Ω to 1MΩ. - Multifunctional cable test equipment which is capable of 5 tests per second as a test standard.
delete The method according to claim 1,
The Mother Board 210 having the CPU uses a bus and a connector for a Versa Module Eurocard (VME) that can mount up to eight relay boards,
A connection test of the cable test equipment, an input terminal of the insulation resistance measurement unit, a test channel to which a test cable to be tested is connected, and an operation program of the software stored in a firmware ROM (Read Only Memory) And having a communication address at the same level as the relay board,
And a control power source (+ 5V) used in the relay board itself is a step-down converter (DC-DC Step Down Converter).
The method of claim 3,
The relay board 300 operates according to a selected test procedure by communicating with an operating program of the software and a universal serial bus (USB) for quick and accurate operation of the relay board,
In order to extend the test point to 512 points, it is designed as a slot type structure supporting 64 points per the relay board,
And an inspection function for displaying the operation status of each relay to the user through the operation program of the software. The ID is assigned to each slot so that the test can be performed even if the module is mounted in any one slot and assigned to the mother board having the CPU of the signal transfer unit So that it can be used as a cable.
The method according to claim 1,
The operating program of the software allows the user to edit the channel information of the test object, the signal name, the reference value, and the error for convenience of editing the test procedure,
Test procedure editing function that allows all editing procedures intuitively on one screen, function to call up test procedure created by user in EXCEL environment, test procedure through net search automatically connected test object , A function of editing a test report, a report management function, a security function, a communication setting function, and a self diagnosis function are set in advance.
6. The method of claim 5,
The test procedure editing function on the screen allows the user to add a project in the test setting window, add a test object for each project, select a test type, select a test channel, name a test channel, set a reference value, After the setting is completed, the test can be immediately performed and the correction can be performed. When the editing of all the procedures is completed, the storing is performed,
The retrieval function of the test procedure created by the EXCEL is provided with the function of allowing the user to easily edit the test procedure for each corresponding item in the basic test procedure editing window provided in the Excel environment,
The above function can be operated only once after the initial test object is added so as to prevent an error due to misuse. The storage format includes a text data in which fields are separated by a comma and a CSV (Comma Seperated Value) format,
In the test procedure by NET search function, when a user selects a slot connected to the cable test equipment, the test equipment automatically searches connected channel information when a user performs a net search, Can be used to edit the 2-Wire test procedure,
The report management function provides a function of outputting in a basic report format of an Excel form of a basic format desired by the user, and storing the test results in a DB, and searching for each test subject and test date is possible, It is designed as an open type that can support the output and user's desired form,
The security function supports a login function and an administrator mode in order to prevent an unspecified user from accessing the device,
The communication setting function is based on a USB communication method. The communication setting function converts communication through RS-232 and RS-485 in the apparatus and connects the measuring apparatus and the relay board to collect measured result data.
Wherein the self-diagnosis function allows the user to check whether there is an abnormality in the cable test equipment through connectivity, insulation resistance test, communication diagnosis, main board diagnosis and self-diagnosis of the relay board at a desired point of time. Test equipment.

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