Automatic inspection system for medium-frequency switch matrix channel
By designing the automatic inspection system for the IF switch matrix channel, using signal source, power division, gate module and control calculation module, the fast channel fault detection of the 16×32 IF switch matrix is realized, and the time-consuming and labor-intensive in the existing technology is solved. The channel troubleshooting problem significantly saves testing time.
Patent Information
- Application Number
- CN202411493607.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-02-18
AI Technical Summary
When troubleshooting the fault of the IF switch matrix channel, the existing technology needs to manually traverse all channels for inspection, which is time-consuming and labor-intensive, especially for the large-capacity 16×32 IF switch matrix, which takes more than 4 hours.
Design an automatic inspection system for intermediate frequency switch matrix channel, including signal source module, power division module, gate module, switching control module, spectrum meter and control calculation module. Through the control protocol of the control calculation module, the intermediate frequency switch matrix and the gate module synchronize the channel traversal switching according to the preset timing. Each time the switching is switched, the spectrometer data is read, the insertion loss and channel isolation are calculated, and the channel state is judged.
It realizes a quick traversal check of all channels of the IF switch matrix with a maximum capacity of 16×32, detects their working status, judges faults, and gives all test results, which significantly saves manual testing time.
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Figure CN119484339A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field related to automated measurement and installation equipment in the field of satellite communications, and in particular to an automatic inspection system for intermediate frequency switch matrix channels. Background Art
[0002] The intermediate frequency switch matrix is an important part of the shipborne microwave unified measurement and control system. It undertakes the routing selection function of the upstream and downstream intermediate frequency signals and is the throat and bottleneck of the entire system. Once a channel of the intermediate frequency switch matrix fails, the signal will not be connected and the system will not work. Since there are many routing paths in the intermediate frequency switch matrix channel, it is necessary to use a signal source and a spectrum analyzer to traverse and test all channels to troubleshoot channel failures. After the modification of the Yuan 3 ship, the intermediate frequency switch matrix has three types: 16×16, 10×18, and 16×32. Taking the 16×32 intermediate frequency switch matrix as an example, there are a total of 512 channels. If the level and insertion loss of each channel are traversed and checked one by one, assuming that it takes 30 seconds to test and record a channel, it takes 512×30=15360 seconds to troubleshoot the entire intermediate frequency switch matrix, which takes more than 4 hours, which is time-consuming and laborious. Summary of the invention
[0003] The embodiment of the present invention provides an automatic inspection system for intermediate frequency switch matrix channels, which aims to realize rapid traversal inspection of all channels of an intermediate frequency switch matrix with a maximum capacity of 16×32, detect its working status, judge faults, and give all test results. The system can be widely used in intermediate frequency switch matrix inspection tests in microwave unified measurement and control systems, automatically give channel fault information and specific indicators, and greatly save manual testing time.
[0004] The present invention provides an automatic inspection system for intermediate frequency switch matrix channels, comprising a signal source module, a power division module, a gating module, a switching control module, a spectrum analyzer, and a control calculation module, wherein the signal source module is connected to the input end of the power division module, the gating module is connected to the output end of the intermediate frequency switch matrix to be tested, the control calculation module is connected to the switching control module and the spectrum analyzer through a network, the control calculation module is respectively connected to and controls the intermediate frequency switch matrix, the gating module and the spectrum analyzer, under the control protocol of the control calculation module, the intermediate frequency switch matrix and the gating module are synchronously traversed and switched by the control calculation module according to a preset timing, and each time the switching is performed, the control calculation module reads the data of the current spectrum analyzer, calculates the insertion loss and channel isolation of the input and output, and judges the channel state according to the insertion loss and channel isolation of the input and output.
[0005] Optionally, the control calculation module determines the channel state according to the input and output insertion losses, including:
[0006] The signal source module is configured to output a 70MHz intermediate frequency signal with a fixed amplitude of -10dBm. The control calculation module reads the 70MHz signal amplitude output by each channel of the intermediate frequency switch matrix from the spectrum analyzer one by one, and performs a differential operation with the input -10dBm. If the difference is less than 1.5dB, the system displays that the channel is normal; otherwise, it displays a fault.
[0007] Optionally, the control calculation module determines the channel state according to the channel isolation between the input and output, including:
[0008] Statistics are collected on the isolation between the output signal amplitude of the current working channel and its two nearest adjacent output channels without signal input. If the isolation is greater than the preset isolation threshold, the isolation between the channel and other channels farther away also meets the requirements, and the system displays that the channel is normal; otherwise, it displays a fault.
[0009] Optionally, the preset isolation threshold is 50db.
[0010] Optionally, the power division module adopts a 1-to-16 intermediate frequency branch module, and the gating module adopts a 32-to-1 switch module.
[0011] Optionally, the control calculation module adopts Windows data storage mode, where high bytes are stored in high addresses and low bytes are stored in low addresses.
[0012] Optionally, the selection module adopts asynchronous communication mode in combination with ASCII data encoding.
[0013] Optionally, a 70 MHz constant temperature crystal oscillator is integrated inside the signal source module, and a 70 MHz intermediate frequency reference signal with an amplitude of -10 dBm is finally phase-locked and output.
[0014] Beneficial technical effects of the present invention:
[0015] The present invention provides an automatic inspection system for intermediate frequency switch matrix channels, comprising a signal source module, a power division module, a gating module, a switching control module, a spectrum analyzer, and a control calculation module, wherein the signal source module is connected to the input end of the power division module, the gating module is connected to the output end of the intermediate frequency switch matrix to be tested, and the control calculation module is connected to the switching control module and the spectrum analyzer through a network. Under the control protocol of the control calculation module, the intermediate frequency switch matrix and the switch module are synchronously traversed and switched by the control calculation module according to a preset timing sequence. Each time the switching is performed, the control calculation module reads the data of the current spectrum analyzer, calculates the insertion loss and channel isolation of the input and output, and judges the channel state according to the insertion loss and channel isolation of the input and output. It can realize a rapid traversal check of all channels of the intermediate frequency switch matrix with a maximum capacity of 16×32, detect its working state, judge the fault, and give all test results. It can be widely used in the intermediate frequency switch matrix inspection test in the microwave unified measurement and control system, automatically give the channel fault information and specific indicators, and greatly save the manual testing time. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 A schematic diagram of an automatic inspection system for intermediate frequency switch matrix channels provided by the present invention;
[0018] Figure 2 Another schematic diagram of an automatic inspection system for intermediate frequency switch matrix channels provided by the present invention;
[0019] Figure 3 A schematic diagram of inspection results of an automatic inspection system for intermediate frequency switch matrix channels provided by the present invention. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] It should be understood that in various embodiments of the present invention, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
[0022] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.
[0023] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
[0024] refer to Figure 1 , Figure 2 , Figure 3 As shown, an embodiment of the present invention provides an automatic inspection system for intermediate frequency switch matrix channels, including a signal source module 1, a power division module 2, a gating module 3, a switching control module 4, a spectrum analyzer 5, and a control calculation module 6, wherein the signal source module 1 is connected to the input end of the power division module 2, the gating module 3 is connected to the output end of the intermediate frequency switch matrix 7 to be tested, the control calculation module 6 is connected to the switching control module 4 and the spectrum analyzer 5 through a network, and the control calculation module 6 is respectively connected to and controls the intermediate frequency switch matrix 7, the gating module 3 and the spectrum analyzer 5. Under the control protocol of the control calculation module 6, the intermediate frequency switch matrix 7 and the gating module 3 are synchronously traversed and switched by the control calculation module 6 according to a preset timing. Each time the switch is made, the control calculation module 6 reads the data of the current spectrum analyzer 5, calculates the insertion loss and channel isolation of the input and output, and judges the channel state according to the insertion loss and channel isolation of the input and output. The embodiment of the present invention provides an automatic inspection system for the channels of an intermediate frequency switch matrix, which is based on an Ethernet bus and is constructed into a multi-channel data acquisition, analysis and routing control system. It can quickly traverse and inspect all channels of an intermediate frequency switch matrix with a maximum capacity of 16×32, detect its working status, judge faults, and give all test results.
[0025] The control and calculation module 6 has three network cards, which are connected and control the intermediate frequency switch matrix 7, the gating module 3 and the spectrum analyzer 5 respectively. Under the control protocol, the intermediate frequency switch matrix 7 and the gating module 3 are synchronously switched by the control and calculation module 6 according to the established timing. Each time the switching is performed, the control and calculation module 6 reads the current spectrum analyzer reading, calculates the insertion loss and channel isolation of the input and output, determines the channel status, and records and prints it.
[0026] The control calculation module 6 can also be connected and controlled by Ethernet to the intermediate frequency switch matrix 7, the gating module 3 and the spectrum analyzer 5. The intermediate frequency switch matrix 7 is an existing device under test, which adopts serial port to network communication, and the communication protocol adopts the UDP / IP protocol, and communicates in a point-to-point manner. Therefore, the control calculation module 6 uses the existing communication protocol of the 16×32 intermediate frequency switch matrix to control it. According to the control protocol, the control calculation module 6 first initializes the spectrum analyzer and sets the spectrum analyzer parameters, and then controls the intermediate frequency switch matrix 7 and the gating module 3 to select channels in turn, and finally reads the spectrum data and calculates the input and output signal amplitude difference and channel isolation, compares it with the set gain threshold, judges the channel status and displays it on the interface, and when all channels are traversed and switched, the control computer generates a detection report to display the test results and the faulty channel.
[0027] The signal source module 1 of the embodiment of the present invention is configured to output a 70MHz intermediate frequency signal with a fixed amplitude of -10dBm. The control calculation module 6 reads the 70MHz signal amplitude output by each channel of the intermediate frequency switch matrix 7 from the spectrum analyzer one by one, and performs a differential operation with the input -10dBm. If the difference is less than 1.5dB, the system displays that the channel is normal; otherwise, it displays a fault.
[0028] The control calculation module judges the channel state according to the channel isolation of the input and output, including: counting the isolation between the output signal amplitude of the current working channel and the two adjacent output channels without signal input, if the isolation is greater than the preset isolation threshold, then the isolation between it and other channels farther away also meets the requirements, then the system displays that the channel is normal; otherwise, it displays a fault. Channel isolation is the difference between the output signal amplitude of the current working channel and the signal amplitude of the remaining output channels without signal input. During calculation, in addition to reading the output signal amplitude of the current working channel, it is also necessary to count the signal amplitude values of the remaining 31 output channels without signal input, and perform difference calculations one by one to obtain the isolation values of the current working channel and other channels. The embodiment of the present invention takes into account that it takes a lot of time to calculate each channel one by one. Since the channel isolation is related to the channel distance, the embodiment of the present invention adopts a simplified calculation method, that is, only counting the output signal amplitude of the current working channel and the isolation between the two adjacent output channels without signal input, if the isolation meets the requirements, then the isolation between it and other channels farther away must also meet the requirements, which greatly reduces the calculation complexity and reduces the system inspection time. Preferably, the preset isolation threshold used in the embodiment of the present invention is 50db. In this process, the time for the control calculation module 6 to switch the 16×32 intermediate frequency switch matrix and the strobe module 3 channels is about 200ms, so the control calculation module 6 detects a channel for about 0.5s, and the theoretical total time for traversing and inspecting all channels of the 16×32 intermediate frequency switch matrix is about 256s, which can greatly shorten the detection time of the intermediate frequency switch matrix.
[0029] The embodiment of the present invention provides an automatic inspection system for the channels of an intermediate frequency switch matrix, wherein the power division module 2 adopts a 1-to-16 intermediate frequency branch module, and the gating module 3 adopts a 32-to-1 switch module. To ensure the uniformity of the data, the control calculation module 6 adopts the Windows data storage method, with the high byte stored in the high address and the low byte stored in the low address. The gating module 3 adopts an asynchronous communication method in conjunction with ASCII data encoding. The signal source module 1 integrates a 70MHz constant temperature crystal oscillator, and finally phase-locks and outputs a 70MHz intermediate frequency reference signal with an amplitude of -10dBm.
[0030] refer to Figure 1 and Figure 2 As shown, the signal source module 1 outputs a 70MHz signal into the 1-to-16 intermediate frequency splitter module, which is then divided into 16 channels and enters the 16×32 intermediate frequency switch matrix. The control and calculation module 6 controls the 16×32 intermediate frequency switch matrix according to a certain timing sequence, traverses all channels in the routing order, and controls the 32-to-1 switch module at the same time, sending each 70MHz signal to the spectrum analyzer for display in turn. At the same time, the control and calculation module 6 reads the spectrum analyzer data, calculates the input and output insertion loss and channel isolation, and displays and prints all 512 channel test results.
[0031] The embodiment of the present invention provides an automatic inspection system for the channels of an intermediate frequency switch matrix. After the software and hardware installation and debugging are completed, a channel inspection test is performed on the 16×32 intermediate frequency switch matrix. Before the test, first input the IP addresses corresponding to the test computer and the spectrum analyzer, set the signal source output amplitude to a single carrier signal of -10dBm, and set the gain threshold to -11dB. That is, when the spectrum analyzer detects that the signal output by the intermediate frequency switch matrix is lower than -11dBm, the test computer determines that the channel is faulty, gives a fault indication on the interface, and displays the faulty channel location in the test results. During the test, multiple input and output channel faults of the 16×32 intermediate frequency switch matrix are randomly simulated. The test results are as follows: Figure 3 As shown, Figure 3 Each square in the figure represents each channel of the 16×32 intermediate frequency switch matrix. Red represents a channel failure, and green represents a normal channel. After all channels are inspected, a test report is generated to display the location and output amplitude values of all faulty channels. From the test results, the embodiment of the present invention provides an intermediate frequency switch matrix channel automatic inspection system that only takes 245 seconds to inspect all 512 channels of the 16×32 intermediate frequency switch matrix, and displays all simulated multiple channel failures on the software interface. The generated test report provides the location and output signal amplitude of the faulty channel, which meets the intermediate frequency switch matrix channel inspection test requirements and achieves the expected goals.
[0032] The present invention provides an automatic inspection system for intermediate frequency switch matrix channels, comprising a signal source module, a power division module, a gating module, a switching control module, a spectrum analyzer, and a control calculation module, wherein the signal source module is connected to the input end of the power division module, the gating module is connected to the output end of the intermediate frequency switch matrix to be tested, and the control calculation module is connected to the switching control module and the spectrum analyzer through a network. Under the control protocol of the control calculation module, the intermediate frequency switch matrix and the switch module are synchronously traversed and switched by the control calculation module according to a preset timing sequence. Each time the switching is performed, the control calculation module reads the data of the current spectrum analyzer, calculates the insertion loss and channel isolation of the input and output, and judges the channel state according to the insertion loss and channel isolation of the input and output. It can realize a rapid traversal check of all channels of the intermediate frequency switch matrix with a maximum capacity of 16×32, detect its working state, judge the fault, and give all test results. It can be widely used in the intermediate frequency switch matrix inspection test in the microwave unified measurement and control system, automatically give the channel fault information and specific indicators, and greatly save the manual testing time. An automatic inspection system for intermediate frequency switch matrix channels in an embodiment of the present invention can be widely used in intermediate frequency switch matrix inspection tests in a microwave unified measurement and control system, automatically providing channel fault information and specific indicators, greatly saving manual testing time, and having great promotion and application value on base measurement ships.
[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. An automatic inspection system for intermediate frequency switch matrix channels, characterized in that: The intermediate frequency switch matrix channel automatic inspection system includes a signal source module, a power division module, a gating module, a switching control module, a spectrum analyzer, and a control calculation module, wherein the signal source module is connected to the input end of the power division module, the gating module is connected to the output end of the intermediate frequency switch matrix to be tested, the control calculation module is connected to the switching control module and the spectrum analyzer through a network, the control calculation module is respectively connected to and controls the intermediate frequency switch matrix, the gating module and the spectrum analyzer, and under the control protocol of the control calculation module, the intermediate frequency switch matrix and the gating module are synchronously traversed and switched by the control calculation module according to a preset timing, and each time the switch is switched, the control calculation module reads the data of the current spectrum analyzer, calculates the insertion loss and channel isolation of the input and output, and determines the channel status according to the insertion loss and channel isolation of the input and output.
2. The automatic inspection system for intermediate frequency switch matrix channels according to claim 1 is characterized in that: The control calculation module determines the channel state according to the insertion loss of the input and output, including: The signal source module is configured to output a 70MHz intermediate frequency signal with a fixed amplitude of -10dBm. The control calculation module reads the 70MHz signal amplitude output by each channel of the intermediate frequency switch matrix from the spectrum analyzer one by one, and performs a differential operation with the input -10dBm. If the difference is less than 1.5dB, the system displays that the channel is normal; otherwise, it displays a fault.
3. The automatic inspection system for intermediate frequency switch matrix channels according to claim 1 is characterized in that: The control calculation module determines the channel state according to the channel isolation of the input and output, including: Statistics are collected on the isolation between the output signal amplitude of the current working channel and its two nearest adjacent output channels without signal input. If the isolation is greater than the preset isolation threshold, the isolation between the channel and other channels farther away also meets the requirements, and the system displays that the channel is normal; otherwise, it displays a fault.
4. The automatic inspection system for intermediate frequency switch matrix channels according to claim 3 is characterized in that: The preset isolation threshold is 50db.
5. The automatic inspection system for intermediate frequency switch matrix channels according to claim 1 is characterized in that: The power division module adopts a 1-to-16 intermediate frequency branch module, and the gating module adopts a 32-to-1 switch module.
6. The automatic inspection system for intermediate frequency switch matrix channels according to claim 1 is characterized in that: The control calculation module adopts Windows data storage mode, where high bytes are stored in high addresses and low bytes are stored in low addresses.
7. The automatic inspection system for intermediate frequency switch matrix channels according to claim 1 is characterized in that: The strobe module adopts asynchronous communication mode and ASCII data encoding.
8. The automatic inspection system for intermediate frequency switch matrix channels according to claim 1 is characterized in that: The signal source module integrates a 70MHz constant temperature crystal oscillator inside, and finally phase-locks and outputs a 70MHz intermediate frequency reference signal with an amplitude of -10dBm.