Portable intelligent line checking and insulation detection comprehensive tester

Abstract

The application discloses a portable intelligent line calibration and insulation detection comprehensive tester, which can test the two ends of a multi-core cable in three forms of connector-connector, connector-loose wire and loose wire-loose wire. The tester comprises a box body, a man-machine interaction unit, a test interface, a test circuit module, a power module, a converter, a voice box, a test pen and an MCU processing unit. The box body has a convenient structure. The man-machine interaction unit is used for displaying test results and receiving operation instructions. The test circuit module is connected with the test interface. The converter is a test accessory used for connecting interfaces during test signal conversion. The voice box is connected with the MCU processing unit and is used for reporting test results. The test pen is used for connecting the test circuit module and a terminal to be tested. The test circuit module comprises a line calibration test circuit unit and an insulation test circuit unit. The power module is used for providing power support for the tester. The comprehensive tester has the beneficial effects of faster detection operation, more intelligent man-machine interaction and more abundant functions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail vehicle cable detection, in particular to a portable intelligent line checking and insulation detection comprehensive tester which can check and test the multi-core cable lines of locomotives, subways, urban railways, high-speed railways and bullet trains. BACKGROUND

[0002] In the process of electrical equipment construction, the core wires of the multi-core cable need to be checked to determine whether they are the same cable, whether the core wires in the cable are connected or disconnected, and whether the connection position of the core wires is correct. In the early stage, at least two technicians are needed to operate at both ends of the cable using a walkie-talkie and a multimeter. In the operation, the core wires at one end of the cable are connected through a common line, and the multimeter is used to measure the connection or disconnection of the core wires at the other end of the cable. In this process, the multimeter is used, and each point is manually connected to determine the connection or disconnection of the core wires and the corresponding cables on both sides. When checking the cable of a rail vehicle, a special person is usually arranged to arrange the connection table due to the large number of cables. This method requires many people with electrical basis, and the communication between the personnel is complicated, the test operation is more, and the efficiency is low.

[0003] In view of the above problems, some people in the prior art have proposed a special cable checking instrument, which uses a combination of an electric array and a light-emitting diode to simultaneously check the multiple core wires in the cable. For example, the utility model patent with the patent name of a cable checking detector and the application number of 2017206757283 discloses a line checking detector box, which is provided with a plurality of line checking visible rows. Each line checking visible row includes a start end connection terminal, a self-checking display lamp, a line checking display lamp and an end connection terminal. It also discloses a line checking detection circuit board, which includes a plurality of parallelly connected line checking display circuits. Each line checking display circuit includes a first voltage dividing resistor Rln, a self-checking display diode DSln and a line checking display diode DS2n connected in series. The line checking display diode DS2n is connected in parallel with a second voltage dividing resistor R2n at both ends. The first voltage dividing resistor Rln and the self-checking display diode DSln are connected with the start end connection terminal. The self-checking display diode DSln and the line checking display diode DS2n are connected with the end connection terminal. According to the above structure, the indicator light can quickly determine whether the tested cable is the same cable and whether it is good and conductive during line checking. The inventor of the patent found through practice that the above-mentioned patent application only solves part of the problems, and the operation is still more complicated during testing. Moreover, the function is relatively single, the multi-row indicator light display is low in intelligentization, and the user is prone to visual fatigue after long-term use.

[0004] The inventor of the present patent application has further searched and found that an application named digital line calibrator and a method for realizing line calibration by using the digital line calibrator, application number 201110207178X discloses a structure of adding LED or LCD display screen on the basis of the above patent, which further improves the intelligentization of display, but the convenience of test operation and function expansion are not further optimized.

[0005] In summary, there is still a lack of a line calibration tester which is more convenient in detection operation, more intelligent in man-machine interaction and more abundant in functions. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a portable intelligent line calibration and insulation detection comprehensive tester which is more convenient in detection operation, more intelligent in man-machine interaction and more abundant in functions.

[0007] To solve the above technical problem, the technical solution provided by the present application is as follows: a portable intelligent line calibration and insulation detection comprehensive tester, which comprises a box body, a man-machine interaction unit, a test interface, a test circuit module, a power module, a converter, a voice box, a test pen and an MCU processing unit; the box body is a convenient structure for assembling various functional components and accessories of the tester; the man-machine interaction unit is signal connected with the test circuit module and is used for displaying test results and receiving operation instructions; the test circuit module is connected with the test interface; the converter is a test signal conversion interface accessory; the voice box is signal connected with the MCU processing unit and is used for prompting test results; the test pen is a detachable accessory and is used for connecting the test circuit module and the measured terminal; the test circuit module comprises a line calibration test circuit unit and an insulation test circuit unit; and the power module is used for providing power support for the tester.

[0008] As a preferred, the line calibration test circuit unit comprises a plurality of electronic switches, the opening and closing of each electronic switch is controlled by the program built in the MCU processing unit, and different test functions are formed by the combination of the opening and closing of the electronic switches.

[0009] As a preferred, the converter of the line calibration test circuit unit can output 64-way test signals and is connected with the connector of the measured multi-core cable, and the other end of the connector of the measured multi-core cable is connected with the test interface of the MCU processing unit, so that up to 64-core cables can be calibrated by the combination of the electronic switches; the test circuit is used for testing the multi-core cable with connectors at both ends.

[0010] As preferred; the line testing circuit unit further comprises a testing circuit composed of a testing pen and a current limiting resistor, one end of the testing line core is connected to the testing interface, and the other end is connected to the testing pen led out by the MCU processing unit, and the testing line is used for testing the multi-core cable with one end of the connector and the other end of the scattered line, and simultaneously provided with a voice box.

[0011] As preferred; the line testing circuit unit further comprises a testing circuit composed of two testing pens and a current limiting resistor, one end of the testing line core is connected to the testing pen led out by the MCU processing unit, and the other end is connected to the testing pen led out by the testing interface, and the testing line is used for testing the multi-core cable with both ends of the scattered line, and two scattered ends are respectively provided with a voice box.

[0012] As preferred; the power module is built-in with a voltage boosting unit for boosting the voltage to 500V DC, the insulation testing circuit unit comprises two groups of electronic switches, one end of the first group of electronic switches is connected to the positive pole of the 500V DC voltage output by the power module, and the other end is connected to the testing interface; one end of the second group of electronic switches is connected to the negative pole of the 500V DC voltage output by the power module, and the other end is connected to the testing interface, and the electronic switches in each group are connected in parallel.

[0013] As preferred; the man-machine interaction unit is a tablet computer with a touch function.

[0014] As preferred; it further comprises a self-input line table, and the self-input line table is a testing line table of various detection vehicles which can be inputted by the operator in the tablet computer testing program.

[0015] As preferred; the testing interface comprises a row plug interface and a single interface.

[0016] After the above structure is adopted, the application has the following beneficial effects: 1, comprehensive testing function: in the line testing, in addition to the usual connector-connector line testing, connector-scattered line and scattered line-scattered line line testing can also be realized; in the insulation testing, in addition to the line-ground testing, line-line insulation testing function can also be realized. 2, convenient testing: portable, small size, easy operation; 3, saving labor cost: 2 people can replace the original 3 people to complete the testing operation; 4, improving the safety guarantee coefficient: avoiding the secondary wiring error caused by manual testing; 5, realizing the secondary development function of the wiring table: various vehicle wiring tables can be inputted into excel and stored freely; 6, realizing the big data management: the testing data report can be sent to the upper computer through wifi, which is convenient for unified management.

[0017] In summary, the application provides a portable intelligent line testing and insulation testing comprehensive tester which is faster in detection operation, more intelligent in man-machine interaction and more rich in function. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the principle of connector-to-connector calibration testing corresponding to the portable intelligent calibration and insulation testing instrument of this invention.

[0019] Figure 2 This is a block diagram illustrating the principle of connector testing for loose wires in the portable intelligent wire calibration and insulation testing instrument of this invention.

[0020] Figure 3 This is a block diagram illustrating the principle of the portable intelligent wire alignment and insulation testing instrument used in this invention for testing loose wires against loose wires.

[0021] Figure 4 This is a schematic diagram of the principle of connector-to-connector insulation testing corresponding to the portable intelligent cable calibration and insulation testing instrument of this invention.

[0022] Figure 5 This is a block diagram illustrating the principle of the connector used in the portable intelligent wire alignment and insulation testing instrument of this invention for testing the insulation of loose wires.

[0023] Figure 6 This is a block diagram illustrating the principle of the main circuit ground insulation test for the portable intelligent line calibration and insulation testing instrument of this invention. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings.

[0025] This invention discloses a portable intelligent line calibration and insulation testing integrated tester, which includes a housing, a human-machine interface unit, a test interface, a test circuit module, a power supply module, a converter, a voice box, a test pen, and an MCU processing unit. The housing is a convenient structure for assembling the various functional components and accessories of the tester. The human-machine interface unit is signal-connected to the test circuit module and is used to display test results and receive operation commands. The test circuit module is connected to the test interface. The converter is a test signal conversion interface accessory. The voice box is signal-connected to the MCU processing unit and is used to display test results. The test pen is a detachable accessory used to connect the test circuit module to the terminal under test. The test circuit module includes a line calibration test circuit unit and an insulation test circuit unit. The power supply module provides power support for the tester.

[0026] Preferably, the calibration test circuit unit includes several electronic switches, and the on / off state of each electronic switch is controlled by a program built into the MCU processing unit. By controlling various combinations of on / off states of the electronic switches through the program, different test functions can be formed.

[0027] As preferred; the converter of the line testing circuit unit can output 64-way test signals connected with the connector of the multi-core cable to be tested, and the connector at the other end of the multi-core cable to be tested is connected with the MCU processing unit test interface, and the test can be performed on up to 64-core cables through the combination of electronic switches.

[0028] As preferred; the line testing circuit unit further comprises a test circuit composed of a test pen and a current limiting resistor, one end of the wire core to be tested is connected with the test interface, and the other end is connected with the test pen led out by the MCU processing unit, and the test circuit is used for testing the multi-core cable with one end being a connector and the other end being a scattered wire, and a voice box is provided at the same time.

[0029] As preferred; the line testing circuit unit further comprises a test circuit composed of two test pens and a current limiting resistor, one end of the wire core to be tested is connected with the test pen led out by the MCU processing unit, and the other end is connected with the test pen led out by the test interface, and the test circuit is used for testing the multi-core cable with both ends being scattered wires, and a voice box is provided at each of the two scattered wire ends.

[0030] As preferred; the power module is built-in with a voltage boosting unit for boosting the voltage to 500V DC, the insulation testing circuit unit comprises two groups of electronic switch groups, one end of the first group of electronic switches is connected with the positive pole of the 500V DC voltage output by the power module, and the other end is connected with the test interface; one end of the second group of electronic switches is connected with the negative pole of the 500V DC voltage output by the power module, and the other end is connected with the test interface, and the electronic switches in each group are connected in parallel.

[0031] As preferred; the man-machine interaction unit is a tablet computer with touch function.

[0032] As preferred; it further comprises a self-input line table, and the self-input line table is a test line table of various detection vehicles input by the operator in the test program of the tablet computer.

[0033] As preferred; the test interface comprises a row plug interface and a single interface.

[0034] Embodiment one, combined with the attached Figure 1 Taking the connector-connector test of 64-core cable as an example, the test principle is as follows: the MCU processing unit sends the test signal into the converter, and at the same time, the program controls the action of the electronic switches K1-K64 to make the test feedback signal sent into the MCU unit for analysis and processing, and the processing result is compared with the test line table to make a logical judgment, so as to determine whether the test line connection is correct or broken.

[0035] The testing method is as follows: one end of the cable to be tested is connected to the connector of the tester, and the other end is connected to the converter led out by the tester. After the connection is completed, click start test on the tester, and the line core connection position can be automatically detected to see if it is normal, if there is a short circuit between them, and if the line core is broken. If the test connection is incorrect, a red "error" is displayed on the test interface, otherwise a black "normal" is displayed.

[0036] Example two, combined with the attached Figure 2 Taking the connector-dispersion line test 64-core cable as an example, the test principle is as follows: when the test pen (DC 5V ground) is connected to A1-A64 of the head of the cable to be tested, +5V (through a current limiting resistor) forms a current loop through B1-A1 and the test pen (DC 5V ground), and the MCU obtains the level signal of the line through the converter. The MCU compares the line with the test connection table to make a logical judgment, thereby determining whether the connection of the cable to be tested is correct and reporting the line number through the voice box.

[0037] The testing method is as follows: one end of the cable to be tested is connected to the connector of the tester, and the other end is connected to the converter led out by the tester. After the connection is completed, click start test on the tester, and the line core connection position can be automatically detected to see if it is normal, if there is a short circuit between them, and if the line core is broken. If the test connection is incorrect, a red "error" is displayed on the test interface, otherwise a black "normal" is displayed.

[0038] Example three, combined with the attached Figure 3 Taking the connector-dispersion line test 64-core cable as an example, the test principle is as follows: when the test pen CA (DC 5V ground), the cable to be tested A1-B1, the test pen CB, and +5V form a current loop, the MCU obtains a level signal. The MCU compares the line with the test connection table to make a logical judgment, thereby determining whether the connection of the cable to be tested is correct and reporting the line number through the voice box.

[0039] The testing method is as follows: when the test pen and the voice box are used at both A and B ends during testing. If the line table A1-B1, A2-B2, A3-B3… are the same line, when the B end test pen CB clicks B2 and the A end test pen CA clicks A2, the A end test pen indicator light is on, and the voice box at both ends issues the voice "this test is A2-B2, next test A3-B3", indicating that the connection is correct. If the A end test pen indicator light is on, or the voice prompt is not "this test is A2-B2, next test…", the connection is incorrect. If the test connection is incorrect, a red "error" is displayed on the test interface, otherwise a black "normal" is displayed.

[0040] Example four, combined with attached Figure 4 Take 64-core cable as an example to test the insulation between lines: when K1, S64 are closed by program control, V+(DC 500V)-K1-(test interface-connector B)-measured line(B1-A1)-Rx(B1 line-B64 line virtual resistance)-measured line(B64-A64)-(connector B-test interface)-S64-Ry-V-forms a current loop, and the VR voltage value is measured, and the insulation resistance value Rx between (B1 line-B64 line) is calculated by VR=500Ry / (Rx+Ry).

[0041] Example five, combined with attached Figure 5 Take 64-core cable as an example to test the insulation between lines and ground: when K1, Kd are closed by program control, V+(DC 500V)-K1-(test interface-connector B)-measured line(B1-A1)-Rd(B1 line-PE line virtual resistance)-PE line-Kd-Ry-V-forms a current loop, and the VR voltage value is measured, and the insulation resistance value Rd of B1 line-PE line is calculated by VR=500Ry / (Rd+Ry).

[0042] Example six, combined with attached Figure 6 Take 64-core cable as an example to test the insulation between main loop and ground: when K1, Kd are closed by program control, V+(DC 2500V)-K1-A1-(test interface-connector B)-main loop line A-Rd(A-PE virtual resistance)-PE-Kd-Ry-V-forms a current loop, and the VR voltage value is measured, and the insulation resistance value Rd of A to ground is calculated by VR=2500Ry / (Rd+Ry). Similarly, the insulation resistance value Rd of B to ground can be calculated.

[0043] Meanwhile, in specific implementation, in view of the characteristics of multiple user vehicle models and multiple tested wiring tables, the tester is designed with a wiring table secondary development function, and the user only needs to copy various vehicle wiring tables into the sub-file of the program file after compiling them into an excel document, and the system automatically converts them into a test program file, and the user can click the corresponding test program item to perform the test.

[0044] The above describes the present application and its embodiments, which are not restrictive, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired thereby, without departing from the purpose of the present application, without creative design, similar structure and embodiments to the technical solution can be designed, which shall belong to the protection scope of the present application.

Claims

1. A portable intelligent line calibration and insulation testing instrument, characterized in that: It includes a box, a man-machine interaction unit, a test interface, a test circuit module, a power module, a converter, a voice box, a test pen and an MCU processing unit; the box is a convenient structure for assembling various functional components and accessories of the tester; the man-machine interaction unit is signal connected with the test circuit module, for displaying test results and receiving operation instructions; the test circuit module is connected with the test interface; the converter is a test signal conversion interface accessory; the voice box is signal connected with the MCU processing unit, for prompting test results; the test pen is a detachable accessory, for connecting the test circuit module and the terminal to be tested; the test circuit module includes a line calibration test circuit unit and an insulation test circuit unit; the power module is used for providing power support for the tester; the line calibration test circuit unit includes a plurality of electronic switches, the opening and closing of each electronic switch is controlled by the program built in the MCU processing unit, and different test functions are formed by controlling the combination of the opening and closing of the electronic switches; the power module is built in a voltage boosting unit for boosting the voltage to 500V DC, the insulation test circuit unit includes two groups of electronic switch groups, one end of the electronic switches of the first group is connected with the positive pole of the 500V DC voltage output by the power module, and the other end is connected with the test interface; one end of the electronic switches of the second group is connected with the negative pole of the 500V DC voltage output by the power module, and the other end is connected with the test interface, and the electronic switches in each group are connected in parallel; it further includes a self-input line table, the self-input line table is used for the operator to input the test line table of various detection vehicles in the test program of the tablet computer.

2. The portable intelligent line checking and insulation detection comprehensive tester according to claim 1, characterized in that: The converter of the line calibration test circuit unit can output 64 test signals connected with the measured multi-core cable connector, and the other end of the measured multi-core cable connector is connected with the test interface of the MCU processing unit, so that up to 64 core cables can be tested by the combination of the electronic switches; the line calibration test circuit is used for testing the multi-core cable with connectors at both ends. 3.The portable intelligent line checking and insulation detection comprehensive tester according to claim 1, characterized in that: The line calibration test circuit unit further includes a test circuit composed of a test pen and a current limiting resistor, one end of the measured core is connected with the test interface, and the other end is connected with the test pen led out by the MCU processing unit, and the line calibration test circuit is used for testing the multi-core cable with connectors at one end and scattered wires at the other end, and a voice box is provided at the same time.

4. The portable intelligent line checking and insulation detection comprehensive tester according to claim 1, characterized in that: The line calibration test circuit unit further includes a test circuit composed of two test pens and a current limiting resistor, one end of the measured core is connected with the test pen led out by the MCU processing unit, and the other end is connected with the test pen led out by the test interface, and the line calibration test circuit is used for testing the multi-core cable with scattered wires at both ends, and a voice box is provided at each of the two scattered wire ends.

5. The portable intelligent line checking and insulation detection comprehensive tester according to claim 1, characterized in that: The man-machine interaction unit is a tablet computer with touch function.

6. The portable intelligent line checking and insulation detection comprehensive tester according to claim 1, characterized in that: The test interface includes a row plug-in interface and a single interface.

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