Efficient electromagnetic feeder terminal cable automatic test tool

Abstract

The utility model, which belongs to the technical field of cable testing, provides a high-efficiency electromagnetic feeder terminal cable automation test tool comprising a test platform, a test platform, a test platform, and a test platform. A shell metal plate box body; the through hole is formed in the surface of the shell metal plate box body; the box body bolt is in threaded connection with the surface of the shell metal plate box body; the mounting frame is positioned in the shell metal plate box body; the automatic control mainboard comprises a power supply circuit, a single-chip microcomputer interface circuit, a key circuit, a signal input and output interface circuit, a signal feedback circuit, a signal output isolation and feedback circuit and a state display circuit. As the tool has good adaptability, the tool can quickly cope with test tasks of cables of different types and specifications, and thus the test preparation time is remarkably shortened. And through the reserved expansion interface, the test tool can easily realize function upgrading and transformation, so that the whole test equipment always keeps an industry leading level.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cable test technical field, concretely relates to a kind of high-efficiency electromagnetic feeder terminal cable automatic test tool. BACKGROUND

[0002] In power system, feeder terminal cable is the important component of connecting distribution equipment and user. With the acceleration of urbanization and the development of power grid construction, the demand of feeder terminal cable is increasing, and the quality and reliability requirement is also higher and higher.

[0003] The existing cable test tool has the problems of low efficiency, high labor intensity and poor reliability in operation process. In the test process, it is necessary to test whether there is virtual welding, continuous welding and lack of welding by using multimeter and other instruments at both ends of the cable. This manual operation is not only low in efficiency, but also easy to lead to inaccurate test results. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of high-efficiency electromagnetic feeder terminal cable automatic test tool, to solve the problems of low efficiency, high labor intensity and poor reliability of the existing cable test tool in operation process in prior art. In the test process, it is necessary to test whether there is virtual welding, continuous welding and lack of welding by using multimeter and other instruments at both ends of the cable. This manual operation is not only low in efficiency, but also easy to lead to inaccurate test results.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A kind of high-efficiency electromagnetic feeder terminal cable automatic test tool, comprising:

[0007] Shell sheet metal box body;

[0008] Perforation, the perforation is established in the surface of shell sheet metal box body;

[0009] Box bolt, the box bolt is screw thread connection in the surface of shell sheet metal box body;

[0010] Mounting bracket, the mounting bracket is located in shell sheet metal box body;

[0011] Automatic control mainboard, the mainboard includes power supply circuit, single-chip microcomputer interface circuit, key circuit, signal input output interface circuit, signal feedback circuit, signal output isolation and feedback circuit, state display circuit;

[0012] The power supply circuit is used for providing stable working power supply, the single-chip microcomputer interface circuit is used for realizing test control logic, the button circuit is used for receiving operation instructions of a user, the signal input and output interface circuit is used for expanding the number of I / O ports of the single-chip microcomputer, the signal feedback circuit is used for detecting the electrical connection state between cable terminals, the signal output isolation and feedback circuit is used for guaranteeing the safety of the system, and the state display circuit is used for displaying test results.

[0013] As a preferred scheme of the utility model, the power supply circuit includes two parts of power supply modules which are isolated from each other, one part is used for providing 5V DC power supply for the main control board, and the other part is used for providing 5V DC power supply for the test terminal.

[0014] As a preferred scheme of the utility model, the single-chip microcomputer interface circuit adopts STM32F103C8T6 single-chip microcomputer core board, the core board has at least 8 open-out interfaces, 8 open-in interfaces, 4 open-out control interfaces, 4 open-in control interfaces, 1 state display interface and 1 reset interface.

[0015] As a preferred scheme of the utility model, the button circuit includes a ''test'' button and a ''reset'' button, wherein the ''test'' button is used for triggering a test process, and the ''reset'' button is used for resetting a test state, and the signal input and output interface circuit realizes the expansion of I / O ports through a 74HC245 chip, and can meet the test demand of at least 32 terminals.

[0016] As a preferred scheme of the utility model, the signal feedback circuit includes 32 interface terminals, each terminal can independently output test voltage and read feedback voltage, and is used for detecting the continuous welding condition between terminals, and the signal output isolation and feedback circuit adopts optical coupling isolation technology, ensures the electrical isolation between the single-chip microcomputer and external test terminals, and improves the safety and stability of the system.

[0017] As a preferred scheme of the utility model, the state display circuit includes at least 32 state indicator lamps, and is used for visually displaying the test state of each test terminal, wherein a green lamp is used for indicating a continuous welding state, and a red lamp is used for indicating an open circuit state, the test tool can automatically identify and report the virtual welding, continuous welding, missing welding and miswelding problems of the cable, and the accuracy and efficiency of the test are improved.

[0018] As a preferred scheme of the utility model, the test tool has good adaptability, is suitable for cable tests of various types and specifications, and has reserved expansion interfaces, so that future function upgrading and modification are facilitated.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] 1、The scheme, since the tooling has good adaptability, can quickly respond to different types and specifications of cable test task, thereby significantly shortening the test preparation time. In addition, through the reserved expansion interface, the test tooling can easily realize function upgrade and transformation, so that the whole test equipment always maintains the industry leading level, saves a lot of equipment replacement cost.

[0021] 2、The scheme, through the modular design and adjustable clamp, reduces the skill requirement of the operator, so that the test process is more simple and safe. On the other hand, the reserved expansion interface provides unlimited possibilities for the functional expansion of the test system, so that the enterprise can quickly respond when facing market changes and technological progress, ensure the reliability of the test result, these beneficial effects promote the healthy development of the cable manufacturing industry, improve the product quality, reduce the production cost, bring long-term economic benefits to the enterprise. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation of the present application.

[0023] In the drawings:

[0024] Figure 1 The inside view of the shell sheet metal box body of the present application;

[0025] Figure 2 The cable tooling work flow chart of the present application;

[0026] Figure 3 The automatic control main board principle diagram of the cable tooling of the present application;

[0027] Figure 4 The power supply circuit diagram of the present application;

[0028] Figure 5 The single-chip microcomputer interface circuit diagram of the present application;

[0029] Figure 6 The key circuit diagram of the present application;

[0030] Figure 7 The signal input and output interface circuit diagram of the present application;

[0031] Figure 8 The signal feedback circuit diagram of the present application;

[0032] Figure 9 The test signal input isolation and state display circuit diagram of the present application;

[0033] Figure 10The signal output isolation and feedback circuit diagram of the utility model.

[0034] Figure 11 The cable tool state display lamp plate principle diagram of the utility model.

[0035] In the figure: 1, the shell sheet metal box body, 2, the perforation, 3, the mounting bracket, 4, the box bolt. DETAILED DESCRIPTION

[0036] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0037] Embodiment 1

[0038] Please refer to Figures 1-11 The utility model provides the following technical scheme:

[0039] A kind of high-efficiency electromagnetic feeder terminal cable automatic test tool, comprising:

[0040] Shell sheet metal box body 1;

[0041] Perforation 2, perforation 2 is set up in the surface of shell sheet metal box body 1;

[0042] Box bolt 4, box bolt 4 is screw thread connection in the surface of shell sheet metal box body 1;

[0043] Mounting bracket 3, mounting bracket 3 is located in shell sheet metal box body 1;

[0044] Automatic control mainboard, mainboard includes power supply circuit, single-chip microcomputer interface circuit, button circuit, signal input output interface circuit, signal feedback circuit, signal output isolation and feedback circuit, state display circuit;

[0045] Among them, power supply circuit is used to provide stable working power supply, single-chip microcomputer interface circuit is used to realize test control logic, button circuit is used to receive the operation instruction of user, signal input output interface circuit is used to expand the I / O port quantity of single-chip microcomputer, signal feedback circuit is used to detect the electrical connection state between cable terminal, signal output isolation and feedback circuit is used to guarantee the safety of system, state display circuit is used to display test result.

[0046] In the embodiment of the utility model, the shell sheet metal box body 1 is the protective shell of the whole test tooling, ensures the safety of internal components, the perforation 2 is convenient for the access and fixed of cable, the box body bolt 4 is convenient for the splicing of shell sheet metal box body 1, the mounting bracket 3 is used for supporting and fixing the automation control mainboard, the power supply circuit adopts 220V AC power supply, the circuit board needs 220 / 5V isolated DC power supply, the main power module converts 220V AC into 5V DC, supplies power for single-chip microcomputer part and peripheral circuit, the terminal part needs another 5V power supply isolated from the main power supply, to ensure the safe and reliable operation, the single-chip microcomputer interface circuit core control unit is responsible for executing test logic and control command, the part of key circuit user interface allows operating personnel to input test parameters or start / stop test process, signal input output interface circuit: expands the I / O port of single-chip microcomputer, supports more kinds of cable test requirements, signal feedback circuit: real-time monitoring the electrical connection state between cable terminals, ensures the accuracy of test data, signal output isolation and feedback circuit: prevents external interference from affecting test results, at the same time protects the test equipment from being damaged, state display circuit: intuitively shows test results and system status to users through LED lamp or other display, solves the problems such as virtual welding, continuous welding and lack of welding in manual test by using universal meter and other instruments, improves the efficiency and reliability of cable test, improves the efficiency of cable test, reduces the time and labor intensity of manual operation, improves the reliability of test, reduces the test error caused by improper manual operation, simple structure, convenient operation, easy to realize industrial standard operation.

[0047] For details, please refer to Figures 1-11 The power supply circuit includes two mutually isolated power modules, one of which is used to provide 5V DC power for the main control board, and the other is used to provide 5V DC power for the test terminal.

[0048] In this embodiment: the first part of the power module is responsible for providing stable 5V DC power for the main control board, among which the input end: access to 220V AC power, transformer: step-down AC power to a safe voltage, rectifier: convert the AC output by the transformer into DC, filter: filter the rectified DC to reduce ripple, voltage regulator: use a voltage regulator chip to stabilize the filtered DC at 5V, output end: connected to the main control board, providing 5V DC power for the main control board, the second part of the power module is used to provide 5V DC power for the test terminal, among which the input end: also access to AC power, which can be shared with the input end of the first part of the power module, transformer: the same as the transformer of the first part of the power module, the output voltage is 12V, rectifier: convert the AC output by the transformer into DC, filter: filter the rectified DC, isolation circuit: use isolation elements such as optocoupler or magnetic coupling to ensure that the power supply of the test terminal is isolated from the power supply of the main control board, improving the safety of the system, voltage regulator: use a voltage regulator chip to stabilize the filtered DC at 5V, output end: connected to the test terminal, providing 5V DC power for the test terminal.

[0049] For details, please refer to Figures 1-11 , the single-chip microcomputer interface circuit uses an STM32F103C8T6 single-chip microcomputer core board, which has at least 8 outgoing interfaces, 8 incoming interfaces, 4 outgoing control interfaces, 4 incoming control interfaces, 1 status display interface, and 1 reset interface.

[0050] In this embodiment: an STM32F103C8T6 single-chip microcomputer core board is used, which has the following interfaces and functions: outgoing interfaces: at least 8 outgoing interfaces for outputting control signals to external devices or circuits. These interfaces can be used to drive relays, switches, or other execution elements to achieve various control operations during cable testing, incoming interfaces: at least 8 incoming interfaces for receiving input signals from external devices or circuits. These interfaces can be used to detect the connection state of the cable, sensor signals, or other feedback information, outgoing control interfaces: 4 outgoing control interfaces for further controlling the output signals of the outgoing interfaces. These interfaces can provide additional control logic to ensure the accuracy and safety of the outgoing signals, incoming control interfaces: 4 incoming control interfaces for controlling the signal processing of the incoming interfaces. These interfaces can be used to configure the electrical characteristics of the input signals, such as pull-up, pull-down, or filtering, status display interface: 1 status display interface for connecting to external display devices such as LED indicator lights or LCD screens to visually display status information during testing, such as test progress, test results, or system failures, reset interface: 1 reset interface for manually or automatically resetting the single-chip microcomputer core board to ensure that the system can recover to the initial state when an exception occurs.

[0051] For details, please refer toFigures 1-11 The key circuit includes a "test" key and a "reset" key, wherein the "test" key is used to trigger a test process, and the "reset" key is used to reset a test state; and the signal input and output interface circuit realizes expansion of I / O ports through a 74HC245 chip, and can meet the test demand of at least 32 terminals.

[0052] In the embodiment, the "test" key is used to trigger a test process. When a user presses the "test" key, the single-chip microcomputer interface circuit receives a signal, starts a predetermined test program, and automatically tests the feeder terminal cable. The "reset" key is used to reset a test state. During the test process or after the test is completed, the user can press the "reset" key to clear the current test state and restore the system to an initial state, so as to perform the next test. The 74HC245 chip has a bidirectional transmission function and can enhance the I / O port driving capability of the single-chip microcomputer. The expansion interface can expand sufficient I / O ports through cascading of multiple 74HC245 chips, so as to be connected to at least 32 test terminals. The interface configuration is that the output enable end (OE) and the control end (DIR) of each 74HC245 chip are respectively connected to the single-chip microcomputer interface circuit, and the data transmission direction and the enable state thereof are controlled by the single-chip microcomputer. The data line is that the data input end (A) and the data output end (B) of the 74HC245 chip are respectively connected to the I / O port of the single-chip microcomputer and the test terminal, so as to realize bidirectional transmission of data. The electrical characteristic is that the 74HC245 chip supports TTL level and is compatible with the I / O port of the STM32F103C8T6 single-chip microcomputer, so as to ensure correct transmission of signals.

[0053] For details, please refer to Figures 1-11 The signal feedback circuit includes 32 interface terminals, each of which can independently output a test voltage and read a feedback voltage, and is used to detect a continuous welding condition between the terminals. The signal output isolation and feedback circuit adopts an optical coupling isolation technology, so as to ensure electrical isolation between the single-chip microcomputer and the external test terminals and improve the safety and stability of the system.

[0054] In this embodiment: interface terminals: a total of 32 interface terminals, each terminal is designed to be able to independently output test voltage and read feedback voltage, each interface terminal has the functions of outputting test voltage and reading feedback voltage, and the output and reading operation of each interface terminal can be independently controlled by a single-chip microcomputer, ensuring the flexibility and accuracy of the test, continuous welding detection: by comparing the output voltage and the feedback voltage, it can be judged whether the continuous welding condition between the terminals is good, optocoupler isolator: an optocoupler isolator is used to isolate the signal path between the I / O port of the single-chip microcomputer and the external test terminal, the optocoupler isolator can prevent high voltage or large current from passing through, thereby protecting the single-chip microcomputer from the influence of external circuit abnormalities, the input end of the optocoupler isolator is connected to the I / O port of the single-chip microcomputer, for sending control signals, the output end of the optocoupler isolator is connected to the interface terminal of the signal feedback circuit, for receiving feedback signals, the output end of the optocoupler isolator transmits the received feedback signals back to the single-chip microcomputer, and the single-chip microcomputer judges the test result according to these signals.

[0055] For details, please refer to Figures 1-11 The state display circuit includes at least 32 state indicator lights for visually displaying the test state of each test terminal, wherein the green light is used to indicate the continuous welding state, and the red light is used to indicate the open circuit state, the test tool can automatically identify and report the problems of virtual welding, continuous welding, missing welding and miswelding of the cable, and improve the accuracy and efficiency of the test.

[0056] In this embodiment: at least 32 state indicator lights, each indicator light corresponding to a test terminal, for displaying the test result of the terminal, the indicator light has a green light and a red light, the green light: used to indicate the continuous welding state, that is, when the corresponding test terminal detects a good electrical connection, the green light is on, the red light: used to indicate the open circuit state, that is, when the corresponding test terminal detects that the electrical connection is interrupted or there is a problem, the red light is on, when the single-chip microcomputer receives the feedback signal of the test terminal through the signal feedback circuit, it will control the corresponding state indicator light according to the signal analysis result, if the electrical connection between the test terminals meets the expectation, the single-chip microcomputer will activate the corresponding green indicator light, if the electrical connection between the test terminals does not meet the expectation, the single-chip microcomputer will activate the corresponding red indicator light.

[0057] For details, please refer to Figures 1-11 The test tool has good adaptability and is suitable for testing various types and specifications of cables, and has reserved expansion interfaces for future function upgrade and modification.

[0058] In the embodiment: test tool adopts modular design, each test component can be quickly replaced or adjusted according to different cable types and specifications, without complex reconfiguration, through the reserved expansion interface, the test tool can easily upgrade the hardware, such as adding new test functions, improving test accuracy or increasing test speed, software upgrade can be carried out through online update or local installation, to ensure that the test tool can keep up with the latest technology development and test standard, the modular design of the test tool makes the modification process more simple, users can replace or upgrade specific modules according to actual needs, without changing.

[0059] The working principle and use process of the utility model: when using the test tool to test the cable, first, the cable to be tested is connected into the shell sheet metal box body 1 through the perforation 2, and is fixed through the mounting frame 3, then, the operator can set the test parameters such as voltage, current, etc. through the key circuit, and start the test process. The single-chip microcomputer interface circuit applies corresponding electric signal to the cable according to the preset test logic control signal input-output interface circuit, and monitors the response of the cable through the signal feedback circuit. After the test is completed, the signal output isolation and feedback circuit ensures that all electric energy is safely disconnected, and finally the state display circuit displays the test result, and informs the user whether the cable is qualified.

[0060] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A high efficiency electromagnetic feeder termination cable automated test fixture, characterized by, The utility model relates to a kind of test tool for cable, including: Shell sheet metal box (1); Perforation (2), the perforation (2) is opened in the surface of shell sheet metal box (1); Box bolt (4), the box bolt (4) is threadedly connected in the surface of shell sheet metal box (1); Mounting bracket (3), the mounting bracket (3) is located in shell sheet metal box (1); Automatic control mainboard, the mainboard includes power supply circuit, single-chip microcomputer interface circuit, button circuit, signal input-output interface circuit, signal feedback circuit, signal output isolation and feedback circuit, state display circuit; Wherein, the power supply circuit is used to provide stable working power supply, the single-chip microcomputer interface circuit is used to realize test control logic, the button circuit is used to receive the operation instruction of user, the signal input-output interface circuit is used to expand the I / O port quantity of single-chip microcomputer, the signal feedback circuit is used to detect the electrical connection state between cable terminal, the signal output isolation and feedback circuit is used to guarantee the safety of system, the state display circuit is used to show test result.

2. The high efficiency electromagnetic feeder termination cable automated test fixture of claim 1, wherein: The power supply circuit includes two parts of mutually isolated power supply module, one part is used to provide 5V DC power supply for main control board, and another part is used to provide 5V DC power supply for test terminal.

3. The high efficiency electromagnetic feeder termination cable automated test fixture of claim 2, wherein: The single-chip microcomputer interface circuit uses STM32F103C8T6 single-chip microcomputer core board, and the core board has at least 8 outgoing interfaces, 8 incoming interfaces, 4 outgoing control interfaces, 4 incoming control interfaces, 1 state display interface and 1 reset interface.

4. The high efficiency electromagnetic feeder termination cable automated test fixture of claim 3, wherein: The button circuit includes "test" button and "reset" button, wherein, "test" button is used to trigger test process, "reset" button is used to reset test state, the signal input-output interface circuit realizes the expansion of I / O port through 74HC245 chip, and can meet the test demand of at least 32 terminals.

5. The high efficiency electromagnetic feeder termination cable automated test fixture of claim 4, wherein: The signal feedback circuit includes 32 interface terminals, each terminal can independently output test voltage and read feedback voltage, and is used to detect the continuous welding condition between terminals, the signal output isolation and feedback circuit uses optical coupling isolation technology, to ensure the electrical isolation between single-chip microcomputer and external test terminal, improve the safety and stability of system.

6. The high efficiency electromagnetic feeder termination cable automated test fixture of claim 5, wherein: The state display circuit includes at least 32 state indicating lamps, for directly showing the test state of each test terminal, wherein green lamp is used to indicate continuous welding state, and red lamp is used to indicate open-circuit state, the test tool can automatically identify and report cable false welding, continuous welding, lack of welding, wrong welding problem, improve the accuracy and efficiency of test.

7. The high efficiency electromagnetic feeder termination cable automated test fixture of claim 6, wherein: The test tool has good adaptability, and is suitable for cable test of various types and specifications, and reserved expansion interface is convenient for future function upgrade and modification.

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