Automatic detection system and method for cable sequence

Abstract

The invention discloses a cable sequence automatic detection system and method, the system comprises a sending device and a detection device, the sending device and the detection device each comprise a main control board, an interface conversion board, a 485 communication module and a wireless communication module, one end of the interface conversion board of the sending device is connected with a main control board interface of the sending device through a signal sending board, and the other end of the interface conversion board of the sending device is connected with a 485 communication module. The other end of the interface conversion board of the sending device is connected with one end of the interface conversion board of the detection device, and the other end of the interface conversion board of the detection device is connected with the main control board interface of the detection device through the signal detection board. By using the main control board, the signal sending board and the signal detection board, full automation of data transmission, signal sending, signal detection, result collection and logic judgment is realized; the display touch screen is adopted to display the test result, and the interface conversion board is adopted to adapt to joints of various models and specifications, so that full-automatic test is realized, the test result is displayed, the operation steps are simplified, the test time is saved, and the test efficiency is improved.

Description

Technical Field

[0001] The present invention relates to a detection system, and in particular to an automatic detection system and method for cable line sequence. Background Art

[0002] The basic test principle of cable sequence, on / off and short circuit is to build a circuit loop and use a test tool or method with sound, light and numerical display functions to show the on / off status of the circuit to the tester. Taking the process of measuring the cable with the on / off block of a general multimeter as an example, the cable to be tested is first divided into the test end and the loop end. The whole test process requires two testers to cooperate with each other. One tester operates the multimeter at the test end to give a test signal and check the on / off finger of the multimeter; the other tester uses a wire to build a test loop at the loop end and cooperates with the tester at the test end to complete the test; the personnel at both ends first select the shielding layer of the cable to be tested as the common ground of the loop, and then the testers at both ends cooperate with each other to complete the test in sequence according to the core sequence number of the connecting wire and the tester at the test end records the test results. Since manual inspection itself has the characteristics of low standardization, high error rate and low efficiency, its inspection efficiency and accuracy are greatly affected by the professional and technical proficiency of the personnel, especially when the number of cores in the cable increases, manual inspection requires personnel to frequently manually switch the cable cores connected by the multimeter probe or wire, and the workload increases exponentially, further reducing the inspection efficiency.

[0003] The prior art discloses a utility model patent with the authorization announcement number CN 215894897 U and the name of the marine aviation plug wiring tester. However, the instrument still has the following deficiencies in terms of cable connector specification adaptability and detection process automation:

[0004] (1) The test process requires manual operation and interpretation and summary

[0005] The instrument provides a switch for each core of the cable to be tested. During the test, the tester turns on each switch at the test end in the agreed order, and observes and records the lighting of the indicator lights at the auxiliary test end to determine the cable sequence, on / off, and short circuit conditions. There are many working steps, and the problem of heavy workload in the cable detection process has not been completely solved.

[0006] (2) Long-distance testing requires cooperation of two persons

[0007] If the cable to be tested is long, a single person cannot observe the lighting of the indicator light on the auxiliary test end while operating the test end. In this case, another tester needs to stand by at the auxiliary test end and use intercoms, mobile phones, wired phones and other communication methods to establish communication with the tester at the test end, and provide feedback on the lighting of the indicator light according to the instructions of the tester at the test end. Long-distance clear voice communication is greatly affected by on-site environmental factors, especially when wireless voice communication is used. The noise, intermittent, volume and other factors in the communication process have a great impact on the correct understanding of the communication content, and sometimes repeated confirmation is required, which reduces work efficiency.

[0008] (3) The adaptability of cable connectors needs to be improved

[0009] This instrument is suitable for measuring the line sequence of a specific type of cable, and requires that the aviation plugs at both ends of the cable be of the same type, which limits the use of the instrument. For cables with different types of aviation plugs at both ends, manual methods are still required to measure the line sequence. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide a visual multi-port adapter cable line sequence automatic detection system with reasonable design, convenient use and full-automatic long-distance line sequence measurement. The tester can flexibly select the connector adapter according to the connector models at both ends of the cable to be tested, and only two manual wiring operations are required to complete the full-automatic measurement.

[0011] Another technical problem to be solved by the present invention is to provide an automatic detection method for cable line sequence of visual multi-port adapter with reasonable design, simple operation, high automation and high inspection efficiency in view of the deficiencies in the prior art.

[0012] In order to achieve the above object, the present invention adopts the following technical solutions:

[0013] An automatic detection system for cable sequence, characterized in that the system comprises a sending device and a detection device, wherein the sending device is connected to the detection device by a wired communication module or a wireless communication module;

[0014] The sending device and the detection device both include a main control board, an interface conversion board, a 485 communication module, and a wireless communication module. One end of the interface conversion board of the sending device is connected to the main control board interface of the sending device through a signal sending board, and the other end of the interface conversion board of the sending device is connected to one end of the interface conversion board of the detection device. The other end of the interface conversion board of the detection device is connected to the main control board interface of the detection device through a signal detection board.

[0015] The signal sending board is used to send test signals under the control of the main control board. The signal detection board is used to realize signal detection and result recording under the control of the main control board. The interface conversion board is used to provide connector sockets of various specifications and adapt to different specifications of cable connectors to be tested. The 485 communication module is used to realize wired data transmission and reception, and the wireless communication module is used to realize wireless data transmission and reception.

[0016] The technical problem to be solved by the present invention can also be achieved by the following technical solution. The signal sending board is provided with one 74HC238 chip as a chip selection signal and eight 74HC238 chips. One 74HC238 chip and eight 74HC238 chips together form a 6-64 decoder, which realizes the conversion of the 6-bit binary input of the input terminals B0 to B5 into the output terminals W0 to W 63 The high-level control signal output of the 64 terminals is converted into the high-level test signal output of the terminal by using 16 74HC126 chips as the output drive circuit.

[0017] The technical problem to be solved by the present invention can also be achieved through the following technical scheme, the signal sending board and the main control board are connected through 7 GPIO signal lines, among which 6 signal lines are connected to the B0 to B6 terminals of the signal sending board to control 64 high-level control signal outputs; and 1 signal line is connected to the E terminal of the signal sending board, which serves as an enable control signal to control whether the entire signal sending board is in working state or standby state.

[0018] The technical problem to be solved by the present invention can also be achieved by the following technical solution: the signal detection board uses a 74HC138 as a chip selection signal, and together with 8 74HC251s, it forms a 64-way signal selector; the signal selector leads out 8-way interfaces, wherein T is used to output the level signal of one of the selected channels, and B0 to B6 are used for W0 to W 63 There are 64 signal options in total. The 6-bit binary number corresponds to 64 input terminals. E is used as the enable terminal to control whether the signal detection board is in working state or standby state.

[0019] The technical problem to be solved by the present invention can also be achieved by the following technical solution: the signal detection board is connected to the main control board through an 8-way GPIO interface, and the main control board inputs continuously changing binary digits from 000000 to 111111 to terminals B0 to B6 of the signal detection board; each digit is maintained for a certain period of time. The main control board detects the level state on the T terminal during the duration.

[0020] The technical problem to be solved by the present invention can also be achieved through the following technical solution: the sending device and the detection device also include a display touch screen for providing an interface display and a touch operation environment.

[0021] A method for using the above-mentioned automatic detection system for cable line sequence, characterized in that, when in use, one end of the cable to be tested is used as a signal sending end, connected to the interface conversion board of the sending device; the other end is used as a signal detection end, connected to the interface conversion board of the detection device; a communication relationship between the sending device and the detection device is established between the main control boards of the sending device and the detection device through wired or wireless means; the sending device gives a test signal, and controls the detection device through wired or wireless means to complete signal detection and obtain test results; the sending device compares the test signal with the test result, determines the cable line sequence, on / off, and short circuit conditions, and displays the test results in the form of a list on a display touch screen.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] First, the automation of test signal transmission and detection is achieved by using the main control board, signal transmission board, and signal detection board. The use of the signal transmission board and signal detection board replaces the process of manually establishing and changing the test line in the traditional test method. The data processing and logic judgment capabilities of the main control board can directly give the measurement results, replacing the process of the operator judging the line connection status based on lights, sounds or detection values ​​in the traditional test method;

[0024] Second, by setting up a 485 communication module and a wireless communication module, a wired or wireless communication module is used to transmit test instructions and test results. The present invention uses a wired or wireless communication module to construct a data transmission channel between the signal sending end and the signal detection end. The signal sending end uses the channel to send control instructions to the signal detection end and collect test results, replacing the process in which the operator observes the test status and results of both ends at the same time, or collects and summarizes the test status and results of both ends through telephone, intercom, personnel transmission, etc. in the traditional test method.

[0025] The device of the present invention can greatly shorten the work efficiency of ship line sequence inspection when inspecting welding results or using faults, when detecting cable line sequence, short circuit, and open circuit, reduces the requirements for personnel's professional skills, and has certain economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural principle diagram of the automatic detection system for cable sequence of the present invention;

[0027] Figure 2 The following is a detection principle diagram of the automatic detection method of cable line sequence of the present invention;

[0028] Figure 3 This is the design schematic diagram of the signal sending board;

[0029] Figure 4 This is the design schematic diagram of the signal detection board. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Reference Figure 1-4 , an automatic detection system for cable sequence, the system comprising a sending device and a detection device,

[0032] The sending device consists of a display touch screen, a main control board, a signal sending board, an interface conversion board, a 485 communication module, and a wireless communication module. The display touch screen provides an interface display and a touch operation environment. The signal sending board sends test signals under the control of the main control board. The interface conversion board provides connector sockets of various specifications to adapt to different specifications of cable connectors to be tested. The 485 communication module realizes wired data transmission and reception. The wireless communication module realizes wireless data transmission and reception.

[0033] The detection device consists of a display touch screen, a main control board, a signal detection board, an interface conversion board, a 485 communication module, and a wireless communication module. The display touch screen provides an interface display and a touch operation environment. The signal detection board realizes signal detection and result recording under the control of the main control board. The interface conversion board provides connector sockets of various specifications to adapt to different specifications of cable connectors to be tested. The 485 communication module realizes wired data transmission and reception. The wireless communication module realizes wireless data transmission and reception.

[0034] When in use, one end of the cable to be tested is used as the signal sending end and connected to the sending device; the other end is used as the signal detection end and connected to the detection device. The communication relationship between the sending device and the detection device is established by wired or wireless means. The sending device gives a test signal and controls the detection device to complete signal detection and obtain test results by wired or wireless means. The sending device compares the test signal with the test result, determines the cable sequence, on / off, and short circuit, and displays the test result in the form of a list on the display touch screen.

[0035] During the test, if conditions permit, wired communication is preferred to establish data communication between the sending device and the detection device. If the cable to be tested is long, wireless communication can also be used to establish data communication between the sending device and the detection device.

[0036] Reference Figure 3The design principle of the signal transmission board is that the signal transmission board first uses a 74HC238 chip as a chip select signal, and 8 74HC238 chips, numbered ① to ⑧, as the decoding result output terminals, together forming a 6-64 decoder. The decoder realizes the conversion of the 6-bit binary input of the input terminals B0 to B5 into the output terminals W0 to W 63 Then 16 74HC126 chips are used as output drive circuits to convert the 64 high-level control signals output by the decoder into high-level test signal outputs of the terminals.

[0037] The signal transmission board is connected to the main control board through 7 GPIO signal lines. Among them, 6 signal lines are connected to the B0 to B6 terminals of the signal transmission board to control the output of 64 high-level control signals. There is also a signal line connected to the E terminal of the signal transmission board, which is used as an enable control signal to determine whether the entire signal transmission board is in working state or standby state.

[0038] Reference Figure 4 The design principle of the signal detection board is that the signal detection board uses a 74HC138 as a chip select signal, and together with 8 74HC251s, it forms a 64-way signal selector. The signal selection leads to 8-way interfaces, where T is used to output the level signal of one of the selected channels, and B0 to B6 are used for W0 to W 63 There are 64 signal options in total. The 6-bit binary number corresponds to 64 input terminals. E is used as the enable terminal to control whether the signal detection board is in working state or standby state.

[0039] The signal detection board is connected to the main control board through an 8-way GPIO interface. The main control board inputs continuously changing binary digits from 000000 to 111111 to the B0 to B6 terminals of the signal detection board. Each digit is kept for a certain time. The main control board detects the level state on the T terminal during this duration.

[0040] Reference Figure 2 The principle of the detection method of the present invention is:

[0041] The signal transmitting end uses 64 signal transmitting terminals to sequentially maintain a high-level test signal. When a certain signal transmitting terminal of the signal transmitting end maintains a high-level signal, the signal transmitting end sends a short message of "signal transmitting terminal number" through wired or wireless communication, and transmits the number of the transmitting terminal of the current signal transmitting end maintaining a high level to the signal detecting end. The signal detecting end traverses 64 signal receiving terminals, which is called a round of signal detection. During the detection process, the signal detecting end records the relationship between the current high-level terminal number of the signal transmitting end and the terminal number of the signal detecting end with a high-level signal as a connected state, otherwise it is a disconnected state. When the signal detecting end completes a round of signal detection, it sends a short message of "a round of signal detection is completed" to the signal transmitting end through wired or wireless communication. After receiving the short message, the signal transmitting end releases the high-level state of the current signal transmitting terminal and sets the next signal transmitting terminal to a high-level state. Then the number of the signal transmitting terminal in the level state is notified to the signal detecting end, and the signal detecting end completes a round of signal detection and records the results. When the last signal sending terminal of the signal sending end is in a high level state and receives the short message "One round of signal detection completed" sent by the signal detection end, the signal sending end sends a short message "Detection completed" to the signal receiving end. After receiving the message, the signal receiving end returns the test results of this test record to the signal sending end. The signal sending end determines the internal line connectivity of the cable to be tested based on the test results and displays them in a list on the display touch screen.

[0042] exist Figure 2 In the example, when the terminal numbered W0 of the signal transmitting end maintains a high level, the signal transmitting end transmits the terminal number W0 to the signal detecting end. The signal detecting end detects W0 to W0 in sequence when it is known that the terminal W0 of the current signal transmitting end is at a high level. 63 Whenever a high level appears, the connection relationship between the signal transmitting end W0 and the terminal number of the signal detecting end where the high level appears is recorded as connected. Figure 2 The connection relationship is that W0 at the signal sending end and W0 at the signal detection end are connected.

[0043] When the terminal numbered W1 at the signal sending end maintains a high level, according to Figure 2 The connection relationship between the signal detection end and W1 can detect a high level. At this time, it can be determined that a short circuit fault occurs on the side of the cable under test connected to the signal detection end.

[0044] When the signal sending terminal number W2 maintains a high level, according to Figure 2 The signal detection end does not detect a high level, and thus it is determined that there is no connection relationship between W2 of the signal sending end and all terminals of the signal detection end.

[0045] When the signal sending terminal number W3 maintains a high level, according to Figure 2 The signal detection end did not detect a high level. After checking the wiring diagram of the cable to be tested, it was found that W3 of the signal sending end should be connected to W3 of the signal detection end. Based on this, it can be determined that the connection or soldering point is broken.

[0046] In actual testing, the number of cores of the cable to be tested can be set at the signal transmitting end and the signal detecting end, and the number of cores at the signal transmitting end and the signal detecting end can be different. For example, the number of cores at the signal transmitting end is N, and the number of cores at the signal detecting end is M. Then the signal transmitting end only needs to keep the transmitting terminal W0 to the transmitting terminal W N-1 is high level, the signal detection end detects terminals W0 to W in turn M-1 The maximum value of N and M here is 64.

[0047] The present invention has the following advantages:

[0048] First, the present invention uses a signal transmission board and a signal detection board to replace the process of manually establishing and changing the test line in the traditional test method. The data processing and logic judgment capabilities of the main control board can directly give the measurement results, replacing the process in the traditional test method where the operator judges the line connection status based on lights, sounds or detection values.

[0049] Second, this solution uses wired or wireless communication modules to build a data transmission channel between the signal sending end and the signal detection end. The signal sending end uses this channel to send control instructions to the signal detection end and collect test results, replacing the traditional test method in which the operator observes the test status and results of both ends at the same time, or collects and summarizes the test status and results of both ends through telephone, intercom, and personal communication.

[0050] Third, the present invention uses an interface conversion board to convert interfaces of various specifications, and can support line sequence detection of cables with different types of aviation plugs at both ends.

[0051] Fourth, the present invention uses a main control board with data processing and logic analysis capabilities and a wired or wireless communication module to achieve full automation of data transmission, signal transmission, signal detection, result collection, and logic judgment; a display touch screen is used to display the test results. An interface conversion board is used to adapt to connectors of various models and specifications; only one wiring is required at the signal transmission end and one wiring is required at the signal detection end to achieve full automatic testing and display test results, which greatly simplifies the operation steps, saves test time, and improves test efficiency.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic detection system for cable sequence, characterized in that: The system includes a sending device and a detection device, wherein the sending device is connected to the detection device by a wired communication module or a wireless communication module; The sending device and the detection device both include a main control board, an interface conversion board, a 485 communication module, and a wireless communication module. One end of the interface conversion board of the sending device is connected to the main control board interface of the sending device through a signal sending board, and the other end of the interface conversion board of the sending device is connected to one end of the interface conversion board of the detection device. The other end of the interface conversion board of the detection device is connected to the main control board interface of the detection device through a signal detection board. The signal sending board is used to send test signals under the control of the main control board. The signal detection board is used to realize signal detection and result recording under the control of the main control board. The interface conversion board is used to provide connector sockets of various specifications and adapt to different specifications of cable connectors to be tested. The 485 communication module is used to realize wired data transmission and reception, and the wireless communication module is used to realize wireless data transmission and reception.

2. The automatic detection system for cable sequence according to claim 1, characterized in that: The signal transmission board first uses a 74HC238 chip as a chip selection signal, and eight 74HC238 chips, numbered ① to ⑧, as decoding result output terminals, together forming a 6-64 decoder, which realizes the conversion of the 6-bit binary input of the input terminals B0 to B5 into the output terminals W0 to W 63 The high-level control signal output of the 64 terminals is converted into the high-level test signal output of the terminal by using 16 74HC126 chips as the output drive circuit.

3. The automatic detection system for cable sequence according to claim 1, characterized in that: The signal sending board is connected to the main control board through 7 GPIO signal lines, among which 6 signal lines are connected to the B0 to B6 terminals of the signal sending board to control 64 high-level control signal outputs; and 1 signal line is connected to the E terminal of the signal sending board, which serves as an enable control signal to determine whether the entire signal sending board is in working state or standby state.

4. The automatic detection system for cable sequence according to claim 1, characterized in that: The signal detection board uses a 74HC138 as a chip selection signal, and together with 8 74HC251s, it forms a 64-way signal selector; the signal selector leads out 8-way interfaces, among which T is used to output the level signal of one of the selected channels, and B0 to B6 are used for W0 to W 63 There are 64 signal options in total. The 6-bit binary number corresponds to 64 input terminals. E is used as the enable terminal to control whether the signal detection board is in working state or standby state.

5. The automatic detection system for cable sequence according to claim 1, characterized in that: The signal detection board is connected to the main control board through an 8-way GPIO interface. The main control board inputs continuously changing binary digits from 000000 to 111111 to terminals B0 to B6 of the signal detection board; each digit is maintained for a certain time, and the main control board detects the level state on the T terminal within the duration.

6. The automatic detection system for cable sequence according to claim 1, characterized in that: The sending device and the detecting device also include a display touch screen for providing an interface display and a touch operation environment.

7. An automatic detection method using the automatic detection system for cable sequence according to any one of claims 1 to 6, characterized in that: The method is as follows: when in use, one end of the cable to be tested is used as a signal sending end, connected to the interface conversion board of the sending device; the other end is used as a signal detection end, connected to the interface conversion board of the detection device; the main control boards of the sending device and the detection device establish a communication relationship between the sending device and the detection device through a wired or wireless method; The sending device sends a test signal and controls the detection device to complete signal detection and obtain test results through wired or wireless means; The sending device compares the test signal with the test result, determines the cable sequence, continuity, and short circuit conditions, and displays the test result in a list on the display touch screen.

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