A fast offline self-test device for a general-purpose matrix switching board

Abstract

This utility model belongs to the technical field of self-testing devices for matrix switching, specifically relating to a fast offline self-testing device for a general-purpose matrix switching board. It integrates the board's power supply, self-test source, switch, level detection, and control display into a slotted module. After inserting the matrix board, it automatically performs a self-test on all selected combinations of the matrix board and provides the self-test results. If a fault is found, it can locate the power distributor / switch node. No special instruments or connecting cables are required, enabling one-click self-testing. It performs continuity self-tests on all routing nodes of the matrix board. The self-test time for one channel can be controlled within 100 milliseconds, and the self-test time for a 16×16 board can be controlled within 25.6 seconds, which is 100 times faster than offline testing using instruments, manual cable connection, and manual recording and judgment.

Description

Technical Field

[0001] This utility model belongs to the technical field of self-testing devices for matrix switching, and particularly relates to a fast offline self-testing device for a general matrix switching board. Background Technology

[0002] Large-scale plug-in matrix switching products consist of several or dozens of pluggable general-purpose matrix switching boards. A failure in any node of any matrix board, especially if the matrix routing system is using that node, will cause a channel selection failure. Matrix manufacturers periodically inspect the matrix boards. This inspection requires removing the boards and performing offline testing. Testing the matrix boards requires a signal generator and spectrum analyzer or network analyzer, as well as dedicated software for DC power supply and serial port control. Testing all switching combinations of the matrix board involves connecting and disconnecting cables, which is time-consuming. For example, a 16×16 board requires 256 tests, each lasting 10 seconds, for a total of 42 minutes. During this testing time, the signal in some matrix channels will be interrupted.

[0003] To address the aforementioned technical issues, this invention designs a portable matrix card self-testing device. It integrates the power supply, self-test source, switch, level detection, and control display of the matrix card into a slotted module. After inserting the matrix card, it automatically performs a self-test on all selected combinations of the matrix card, providing the self-test results. If a fault is found, it locates the power divider / switch section. No special instruments or connecting cables are required, enabling one-button self-testing. The self-test time for one channel can be controlled within 100 milliseconds, and the self-test time for a 16×16 card can be controlled within 25.6 seconds, reducing offline self-test time by 100 times. This invention solves the problem of needing to remove the matrix card for offline testing during matrix card inspection, which requires special instruments and connecting cables. Utility Model Content

[0004] The purpose of this invention is to provide a fast offline self-testing device for a universal matrix switching board, which solves the technical problem in the prior art that the matrix board needs to be removed for offline testing during the inspection of the matrix board, and that special instruments and connecting cables are required for testing.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A fast offline self-test device for a general matrix switching board includes a power adapter, a DC voltage regulator unit, a control and display unit, and a self-test unit. The self-test unit includes a self-test source unit, a 1:N switch unit, an N:1 switch unit, a level detection unit, and a board slot.

[0007] The power adapter is connected to the DC voltage regulator unit, the DC voltage regulator unit is connected to the self-test unit, the self-test unit is connected to the 1:N switch unit, the 1:N switch unit is connected to the board slot through N lines, the board slot is connected to the N:1 switch unit through N lines, the N:1 switch unit is connected to the level detection unit, and the control display unit is connected to the self-test unit.

[0008] The board slot is connected to the matrix board under test.

[0009] Preferably, the self-test source unit generates a constant power signal at the working center frequency, which is sent to one output port of the matrix board under test through the 1:N switch unit and the board slot. After switching, the signal is output from one output port of the matrix board under test, and then sent to the level detection unit through the board slot and the N:1 switch unit.

[0010] Preferably, the control and display unit controls the channel selection relationship of the matrix board under test, as well as the 1:N switch unit and N:1 switch unit, through the serial bus and I / O level, respectively, to select the test channel, read the power level value of the level detection module, compare it with the output power of the self-test source, calculate the level difference, and determine whether the channel of the matrix board is faulty.

[0011] Preferably, the RF connectors of the board slot and the board under test are BMA blind-plug connectors, and the power supply and control connectors are J30J straight-plug connectors. The board slot includes a connector and a guide groove, and is installed vertically with the self-test device. When the board under test is inserted from top to bottom, the weight of the board itself is used to blindly connect 2*N BMA blind plugs and 1 J30J straight-plug connector, realizing a stable and reliable connection of RF signal and power control. Assembly and disassembly can be achieved without tools. The pressure of the board's own weight and the length of the positioning pin are used to realize a reliable connection of the blind-plug connectors of the matrix board and the slot, and to ensure that the connectors are not overtightened and damaged.

[0012] The beneficial effects of this utility model are as follows:

[0013] This invention comprises a power adapter, a DC voltage regulator unit, a control and display unit, and a self-test unit. The self-test unit includes a self-test source unit, a 1:N switch unit, an N:1 switch unit, a level detection unit, and a board slot. The power adapter is connected to the DC voltage regulator unit, which is connected to the self-test unit. The self-test source unit is connected to the 1:N switch unit, which is connected to the board slot via N lines. The board slot is connected to the N:1 switch unit via N lines, and the N:1 switch unit is connected to the level detection unit. The control and display unit is connected to the self-test unit. The board slot is connected to the matrix board under test. After inserting the matrix board, it automatically performs a self-test on all selected combinations of the matrix board and provides the self-test results. If a fault is found, it locates the power divider / switch node. No special instruments or connecting cables are required, achieving one-click self-testing. It performs continuity self-tests on all routing nodes of the matrix board. The self-test time for one channel can be controlled within 100 milliseconds, and the self-test time for a 16×16 board can be controlled within 25.6 seconds. This is 100 times faster than offline testing that uses instruments, manually connects cables, and manually records judgments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the fast offline self-test device for the universal matrix switching board of this utility model.

[0015] Figure 2 This is a schematic diagram of the working process of the fast offline self-test device for the universal matrix switching board of this utility model.

[0016] Figure 3 These are top and front views of the fast offline self-test device for the universal matrix switching board of this utility model.

[0017] Figure 4 This is an assembly diagram of the fast offline self-test device for the universal matrix switching board of this utility model. Detailed Implementation

[0018] The following is in conjunction with the appendix Figures 1-4 The present invention will be further described in detail below:

[0019] Example 1

[0020] See appendix Figure 1 As shown, a fast offline self-test device for a general matrix switching board includes a power adapter, a DC voltage regulator unit, a control and display unit, and a self-test unit. The self-test unit includes a self-test source unit, a 1:N switch unit, an N:1 switch unit, a level detection unit, and a board slot.

[0021] The power adapter is connected to the DC voltage regulator unit, the DC voltage regulator unit is connected to the self-test unit, the self-test unit is connected to the 1:N switch unit, the 1:N switch unit is connected to the board slot through N lines, the board slot is connected to the N:1 switch unit through N lines, the N:1 switch unit is connected to the level detection unit, and the control display unit is connected to the self-test unit.

[0022] The board slot is connected to the matrix board under test.

[0023] Example 2

[0024] See appendix Figure 3 , 4 As shown.

[0025] The circuit board slot and the board under test use BMA blind-plug connectors for their RF connectors and J30J straight-plug connectors for their power supply and control connectors. The circuit board slot includes a connector and a guide groove and is installed vertically to the self-test device. When the board under test is inserted from top to bottom, the board's own weight is used to blindly connect 2*N BMA blind plugs and 1 J30J straight-plug connector, achieving a stable and reliable connection for RF signals and power control. Assembly and disassembly can be achieved without tools. Furthermore, the pressure of the board's own weight and the length of the positioning pins ensure a reliable connection between the blind-plug connectors of the matrix board and the slot, and ensure that the connectors are not overtightened and damaged.

[0026] Example 3

[0027] See appendix Figure 2 , Figure 2 As shown.

[0028] The self-test source unit generates a constant power signal at the working center frequency, which is sent to one output port of the matrix board under test through the 1:N switch unit and the board slot. After switching, the signal is output from one output port of the matrix board under test, passes through the board slot and the N:1 switch unit, and is sent to the level detection unit. The control and display unit controls the channel selection relationship (a total of N*N connection relationships) of the matrix board under test, as well as the 1:N switch unit and the N:1 switch unit, through the serial bus and I / O level, respectively, to select the test channel, read the power level value of the level detection module, compare it with the output power of the self-test source, calculate the level difference, and determine whether there is a fault in that channel of the matrix board.

[0029] The workflow of the fast offline self-test device for the universal matrix switching board of the present invention is as follows: Figure 2As shown, firstly, the matrix board under test is inserted into the fast offline self-test device of the general matrix switching board, the self-test process is started, the input channel m and the output channel n are set, m=1, n=1, the channel relationship of the matrix board under test is controlled (m→n), the corresponding switch selection is controlled, then the power level value is read and compared with the power of the self-test source unit, the self-test result of the matrix board under test channel is judged and displayed and recorded, and it is judged whether n>N. If not, n=n+1 and the channel relationship of the matrix board under test is re-controlled; if yes, iteratively execute m=m+1, n=1, and judge whether m>N again. If yes, all N*N channels of the board have completed self-test, and it is judged whether the matrix board under test has a fault. If there is a fault, the channel selection relationship is listed.

[0030] The fast offline self-test device for universal matrix switching boards of the present invention is designed with portability and miniaturization in mind. It consists of a commercial power adapter, a self-test device host, and a board guide slot. It can be assembled and disassembled without tools. By utilizing the pressure of the board's own weight and the length of the positioning pin, it can achieve a reliable connection between the blind plug and unplug connectors of the matrix board and the slot, while ensuring that the connectors are not damaged due to excessive tightness.

[0031] In summary, by integrating the power supply, self-test source, switch, level detection, and control display of the matrix board into a slotted module, the system automatically performs self-tests on all selected combinations of the matrix board after the matrix board is inserted, providing the self-test results. If a fault is found, the fault is located at the power divider / switch node. No special instruments or connecting cables are required, enabling one-click self-testing. The system performs continuity self-tests on all routing nodes of the matrix board, with the self-test time for one channel controlled within 100 milliseconds and the self-test time for a 16×16 board controlled within 25.6 seconds. This is 100 times faster than offline testing using instruments, manual cable connections, and manual recording of judgments.

Claims

1. A fast off-line self-test device for a general matrix switching board card, characterized by, It includes a power adapter, a DC voltage regulator unit, a control and display unit, and a self-test unit. The self-test unit includes a self-test source unit, a 1:N switch unit, an N:1 switch unit, a level detection unit, and a board slot. The power adapter is connected to the DC voltage regulator unit, the DC voltage regulator unit is connected to the self-test unit, the self-test unit is connected to the 1:N switch unit, the 1:N switch unit is connected to the board slot through N lines, the board slot is connected to the N:1 switch unit through N lines, the N:1 switch unit is connected to the level detection unit, and the control display unit is connected to the self-test unit. The board slot is connected to the matrix board under test.

2. The fast off-line self-checking device for a general matrix switching board card according to claim 1, wherein, The self-test source unit generates a constant power signal at the working center frequency, which is sent to one output port of the matrix board under test through the 1:N switch unit and the board slot. After switching, the signal is output from one output port of the matrix board under test, and then sent to the level detection unit through the board slot and the N:1 switch unit.

3. The fast off-line self-checking device for a general matrix switching board card according to claim 1, wherein, The control and display unit controls the channel selection relationship of the matrix board under test, as well as the 1:N switch unit and N:1 switch unit, through the serial bus and I / O level, respectively, to select the test channel, read the power level value of the level detection module, compare it with the output power of the self-test source, calculate the level difference, and determine whether the channel of the matrix board is faulty.

4. The fast offline self-test device for a universal matrix switching board according to claim 1, characterized in that, The circuit board slot and the board under test use BMA blind-plug connectors for their RF connectors and J30J straight-plug connectors for their power supply and control connectors. The circuit board slot includes a connector and a guide groove and is installed vertically to the self-test device. When the board under test is inserted from top to bottom, the board's own weight is used to blindly connect 2*N BMA blind plugs and 1 J30J straight-plug connector, achieving a stable and reliable connection for RF signals and power control. Assembly and disassembly can be achieved without tools. Furthermore, the pressure of the board's own weight and the length of the positioning pins ensure a reliable connection between the blind-plug connectors of the matrix board and the slot, and ensure that the connectors are not overtightened and damaged.

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