Multi-channel signal time division multiplexing monitoring system for radar test and use method of multi-channel signal time division multiplexing monitoring system

Abstract

The invention discloses a multi-channel signal time division multiplexing monitoring system for radar testing and a use method, the multi-channel signal time division multiplexing monitoring system comprises a signal processing module, a resource distribution module, a control module and a testing system, the signal processing module is used for receiving at least one to-be-tested signal of a tested product, and classifying and / or conditioning signal amplitude of the to-be-tested signal; the resource allocation module is used for receiving the classified to-be-tested signals, and the output end of the resource allocation module is connected with different to-be-tested signals at different times; the control module is in signal connection with the resource allocation module and is used for controlling the resource allocation module to switch the to-be-tested signal connected with the output end; and the test system is used for receiving the to-be-tested signal transmitted by the resource allocation module and completing a test.

Description

Technical Field

[0001] The present invention relates to the field of testing technology, and in particular to a multi-channel signal time-division multiplexing monitoring system for radar testing and a use method thereof. Background Art

[0002] As radar system functions become increasingly diverse and complex, engineers are also facing huge challenges in radar system testing. During the radar product testing and production stages, there are scenarios where multiple signals need to be tested one by one, or even a variety of different signals need to be monitored simultaneously.

[0003] In the prior art, radar testing technology is mostly carried out manually with corresponding standard instruments. For tests with a large number of products to be tested and complex operations, pure manual operation is inefficient and test resources cannot be fully utilized. Long-term manual operation will cause certain damage to the oscilloscope probe, and improper operation will cause accidental contact between different signals, causing a short circuit to the product under test, which is not conducive to the safety of product testing. Although there are devices and methods for using oscilloscopes for safe measurements in the satellite field, they are limited to the application of one oscilloscope, and more emphasis is placed on test safety. In addition, it is impossible to monitor multi-channel waveform signals, and the utilization rate of expensive instruments such as oscilloscopes is not high.

[0004] Faced with such complex test requirements, existing general-purpose measuring instruments can no longer meet the needs. In order to solve the problem of insufficient utilization and low efficiency of a large number of test resources, improve the efficiency of large-scale data testing, make full use of existing test resources, and avoid waste of test resources, it is imperative to use time-division multiplexing technology to carry out testing. Summary of the invention

[0005] The technical problem solved by the present invention is: in order to streamline the test system, reduce the design cost and improve the test efficiency, the present invention provides a multi-channel signal time-division multiplexing monitoring system for radar testing, so as to realize the miniaturization, universalization and modularization design of the test system and meet the test requirements of radar products in various environments.

[0006] In order to solve the above technical problems, the present invention provides a multi-channel signal time-division multiplexing monitoring system for radar testing, comprising:

[0007] A signal processing module, the signal processing module is used to receive at least one signal to be tested of the product under test, and classify and / or perform signal amplitude conditioning on the signal to be tested;

[0008] A resource allocation module, the resource allocation module is used to receive the classified signals to be tested, and the output end of the resource allocation module is connected to different signals to be tested in a time-sharing manner;

[0009] A control module, the control module being connected to the resource allocation module by signal, and used for controlling the resource allocation module to switch the signal to be tested connected to the output end;

[0010] A test system, wherein the test system is used to receive the signal to be tested transmitted by the resource allocation module and complete the test.

[0011] Preferably, the signal processing module comprises a signal classification unit, and the signal classification unit classifies the signal to be tested into digital electrical signals, analog electrical signals, digital communication signals, and image telemetry signals according to signal types.

[0012] Preferably, the signal processing unit comprises a signal amplitude conditioning unit, which conditions the signal to be measured whose voltage amplitude exceeds a measurement threshold, and adjusts the voltage amplitude of the voltage to be measured to a measurable range by using a proportional attenuation method.

[0013] Preferably, the resource allocation module comprises a two-dimensional matrix switch, the rows of the two-dimensional matrix switch are connected to the test system as output ends, and the columns of the two-dimensional matrix switch are received as input ends by the signals to be tested.

[0014] Preferably, the test system comprises a waveform monitoring module, a voltage acquisition module, a digital communication module, and an image telemetry module, and they are respectively connected to different rows of the two-dimensional matrix switch, wherein:

[0015] The waveform monitoring module is used to realize the electrical signal acquisition and waveform monitoring of the signal to be tested;

[0016] The voltage acquisition module is used to acquire the voltage or resistance of the signal to be measured;

[0017] The digital communication module is used for communication between the product under test and the test system;

[0018] The image telemetry module is used for high-speed transmission of image data.

[0019] Preferably, the waveform monitoring module includes:

[0020] A programmable digital oscilloscope, wherein the input end of the programmable digital oscilloscope is used to receive the signal to be tested, and the number of the input ends is 1 to 4.

[0021] Preferably, the communication protocol adopted by the digital communication module includes any one of RS422, CAN, and 1553B.

[0022] Preferably, the image telemetry module uses high-speed Ethernet to achieve high-speed image data transmission.

[0023] In a second aspect, the present invention provides a method for using the above-mentioned multi-channel signal time-division multiplexing detection system for radar testing, comprising:

[0024] Step S1: Initializing the monitoring system to ensure the normal state of the monitoring system;

[0025] Step S2: After the product under test is powered on, a monitoring item is selected, and resources are allocated to the test system and the signal under test;

[0026] Step S3: According to a predetermined procedure, the control module controls the resource allocation module to sequentially complete the automatic switching between the signal to be tested and the output end of the test system, and complete waveform monitoring and voltage and resistance measurement;

[0027] Step S4: After the test is completed, the power to the product under test is turned off.

[0028] Compared with the prior art, the technical solution provided by the present invention has the following advantages:

[0029] 1. The present invention provides a multi-channel signal time-division multiplexing monitoring system for radar testing, which uses a resource allocation module to realize the function of monitoring and recording a variety of different types of signals, and uses the resource allocation module to switch the configuration of the signal to be tested and the test system, and connects the signal to be tested to the test system. The design is universal and extensible. The monitoring system can be applied to different fields and supports the monitoring of multiple electrical signals. Users only need to configure the ports of the test system to realize a system with new test functions, thereby reducing development and maintenance costs;

[0030] 2. The present invention uses software control to realize automatic switching of test channels, which completely frees testers and reduces the difficulty of operation, thereby comprehensively improving test quality and test efficiency;

[0031] 3. The present invention utilizes time-division multiplexing technology to solve the problem of insufficient utilization and low efficiency of a large number of test resources, improve the efficiency of large-scale data testing, make full use of existing test resources, and avoid waste of test resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a multi-channel signal time-division multiplexing monitoring system for radar testing according to an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the structure of a signal processing unit according to an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the structure of a two-dimensional matrix switch according to an embodiment of the present invention;

[0035] Figure 4 The present invention is a flowchart of a method for using a multi-channel signal time-division multiplexing monitoring system for radar testing according to an embodiment of the present invention.

[0036] The reference numerals are as follows:

[0037] 100-tested product;

[0038] 200-signal processing module; 210-signal classification unit; 220-signal amplitude conditioning unit 220;

[0039] 300-resource allocation module;

[0040] 400-control module;

[0041] 500 - test system; 510 - waveform monitoring module; 520 - voltage acquisition module; 530 - digital communication module; 540 - image telemetry module. DETAILED DESCRIPTION

[0042] The following is combined with Figures 1 to 4 The present invention further describes in detail a multi-channel signal time-division multiplexing monitoring system and a method for using the radar test proposed in the present invention with specific embodiments. According to the following description and claims, the advantages and features of the present invention will become clearer. It should be noted that the drawings are in a very simplified form and are not in precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] refer to Figure 1 This embodiment provides a multi-channel signal time-division multiplexing monitoring system for radar testing, which is composed of a signal processing module 200, a resource allocation module 300, a test system 500 and a control module 400.

[0045] The signal processing module 200 is used to classify and / or adjust the signal amplitude of the test signal of the product under test 100. The signal processing module 200 is located between the product under test 100 and the resource allocation module 300, and classifies the test signal into digital electrical signals, analog electrical signals, digital communication signals, and image telemetry signals according to different signal types.

[0046] refer to Figure 2 The signal processing module 200 includes two parts: a signal classification unit 210 and a signal amplitude conditioning unit 220.

[0047] The signal classification unit 210 classifies the signals to be tested according to the signal characteristics and test requirements, and is mainly divided into four categories, namely: digital electrical signals, analog electrical signals, digital communication signals, and image telemetry signals. The signal classification unit 210 classifies the signals to be tested of various types, so that in the subsequent test process, the signals to be tested of the same type can be selected to be grouped into multiple groups for testing. For example, four signals to be tested of the same type are grouped into one group, with a total of two groups of signals to be tested of the same type. The number of input terminals for receiving the signals to be tested of this type in the test system 500 is four, and a group of signals to be tested of this type can be measured at the same time. The input terminals for receiving the signals to be tested of this type in the test system 500 are time-division multiplexed by the resource allocation module 300, and only two tests are required to complete the test of two groups of signals to be tested of this type (i.e., 8 signals to be tested). Specifically, a junction box can be used to classify the signals to be tested. In addition, the classified test signals can be input into the resource allocation module 300 in sequence according to the signal type. For example, the resource allocation module 300 has 10 input terminals, the first 1 to 4 input terminals can be connected to the first type of test signals, the middle 5 to 6 input terminals are used to connect the second type of test signals, and the last 9 and 10 input terminals are used to connect the third type of test signals.

[0048] The signal amplitude conditioning unit 220 is mainly used to condition the signal to be tested whose voltage amplitude exceeds the measurement threshold, and generally uses a proportional attenuation method to condition the signal to be within the measurable range. For example, the voltage range of the signal to be tested is between 0V and 15V, which has exceeded the measurable range. At this time, the voltage peak is reduced to within 0V to 10V by voltage division, and the voltage value of the signal to be tested can be directly measured by the acquisition card of the test system 500.

[0049] The resource allocation module 300 is used to receive the classified test signals, and the output end of the resource allocation module 300 is connected to different test signals in a time-sharing manner. Figure 3 The resource allocation module 300 includes a two-dimensional matrix switch, which is embedded in a computer case and connected to a test system 500 and a product under test 100 through a dedicated test cable. During testing, the connection position between the signal to be tested and the test system 500 can be changed through software configuration. The rows and columns of the two-dimensional matrix switch are respectively allocated to the test system 500 and the signal to be tested, wherein the rows of the two-dimensional matrix switch are connected to the test system 500 as output terminals, and the columns of the two-dimensional matrix switch are connected to the signal to be tested as input terminals. The number of rows and columns can be appropriately adjusted according to specific test requirements.

[0050] The test system 500 is used to receive the test signal transmitted by the resource allocation module 300 and complete the test. The test system 500 includes a waveform monitoring module 510, a voltage acquisition module 520, a digital communication module 530, and an image telemetry module 540, which are respectively connected to different rows of the two-dimensional matrix switch.

[0051] In this embodiment, the c1-c4 columns of the two-dimensional matrix switch are used as a group of signals to be tested, and the c5-c8 columns are used as a group of signals to be tested for waveform monitoring. The corresponding waveform monitoring module 510 allocates addresses r1-r4 rows on the two-dimensional matrix switch, corresponding to the four channel input terminals of a four-channel oscilloscope. Each row and column of the matrix switch corresponds to a unique physical address. When designing the hardware, each channel of the signal to be tested corresponds to a specific physical address. When compiling the software, the signal address and the physical address are matched one by one to carry out automatic testing. For example, the software address corresponding to the signal to be tested is / PXI1Slot1 / CH1->COM1, and the corresponding physical address is the first column.

[0052] The waveform monitoring module 510 includes a programmable digital oscilloscope. The input end of the programmable digital oscilloscope is used to receive the signal to be tested. The number of input ends is 1 to 4, and the number of input ends is appropriately adjusted according to specific test requirements.

[0053] The voltage acquisition module 520 is embedded in the computer case, and the signal input terminal is the voltage or resistance signal to be acquired through the resource allocation module 300. Figure 3 In this embodiment, the C9 column on the two-dimensional matrix switch can correspond to the signal to be tested that needs to measure voltage or resistance, and the physical address of the corresponding voltage or resistance test system 500 is assigned to the R5-R6 rows on the two-dimensional matrix switch. The two-dimensional matrix switch switches channels through software. When a test channel is connected, the voltage or resistance value of the signal to be tested can be read. Then the R5-R6 rows can automatically switch to the channel of the next signal to be tested. When the number of signals to be tested is large, the advantage is particularly obvious.

[0054] The digital communication module 530 can adopt communication protocols such as RS422, CAN (IOS international standardized serial communication protocol, Controller Area Network), 1553B, etc. Due to different communication methods, the corresponding single group signal quantity will also be different. The address of the signal to be measured for communication is allocated in the column direction of the two-dimensional matrix switch, corresponding to rN, and arranged in sequence. The physical address of the corresponding test system connection is allocated in the row direction of the two-dimensional matrix switch, corresponding to cN, and arranged in sequence.

[0055] The image telemetry module 540 is used for high-speed image signal transmission, which is generally implemented by high-speed Ethernet. Since the image telemetry function is almost an indispensable part in complex radar systems, the image telemetry signal can be directly analyzed and drawn after the data transmitted through Ethernet is drawn, so usually the monitoring is only used to determine whether the received and sent data is normal, and is not used for image display and monitoring.

[0056] In summary, the method of allocating non-overlapping time slices to multiple channels realizes the time-division multiplexing of test resources. When it is the turn of a certain signal to be tested, the signal to be tested is connected to the channel and the test operation is performed. At the same time, the connection between other signals to be tested of the same type and the channel is cut off. After the test is completed, the channel is connected to the next signal to be tested of the same type through the time-division multiplexing switch (i.e., the two-dimensional matrix switch), which effectively improves the utilization efficiency of the test system 500.

[0057] The control module 400 is used to execute the automated test program, switch the channels of the two-dimensional matrix switch according to the test process, connect the signal to be tested and the test system 500 in sequence, and realize waveform monitoring or voltage and resistance measurement.

[0058] refer to Figure 4 The present invention is used for time-division multiplexing monitoring of multi-channel radar signals, and mainly includes the following steps:

[0059] S1. Initialization of various test hardware resources. Before the radar signal test, each monitoring system must first be initialized to ensure the normal state of the monitoring system so that subsequent testing work can proceed normally.

[0060] S2. After the radar product under test is powered on, resources can be allocated to the test system and the signal to be tested according to the selected monitoring items. When it comes to waveform monitoring, the test channel, range, refresh frequency, etc. of the oscilloscope need to be set first. Since the digital oscilloscope can only display 4 signals at the same time, the signals that need to be displayed simultaneously are allocated to the same group, and the signals that do not need to be displayed simultaneously are allocated to different groups.

[0061] S3. According to the established procedures, the matrix switch positions are automatically switched, waveform monitoring and voltage and resistance measurements are completed, and the test results are uploaded to the computer for subsequent query and processing.

[0062] S4. After the test is completed, the tested product and the test system are powered off.

[0063] The overall task of the test system is to coordinate the modules in the system to complete the automatic test of the tested product, monitor the voltage and current test values ​​in real time, and judge it as an abnormal situation when the feedback measurement value exceeds a certain range. At this time, the power supply is cut off through the software. The test results are monitored in real time to ensure the safety of the tested product during the test process, improve the efficiency and accuracy of the signal detection in the tested product, and realize the effective use of the test system.

[0064] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes and modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims. Obviously, a person skilled in the art may make various changes and modifications to the invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A multi-channel signal time-division multiplexing monitoring system for radar testing, characterized in that: include: A signal processing module, the signal processing module is used to receive at least one signal to be tested of the product under test, and classify and / or perform signal amplitude conditioning on the signal to be tested; A resource allocation module, the resource allocation module is used to receive the classified signals to be tested, and the output end of the resource allocation module is connected to different signals to be tested in a time-sharing manner; A control module, the control module being connected to the resource allocation module by signal, and used for controlling the resource allocation module to switch the signal to be tested connected to the output end; A test system, wherein the test system is used to receive the signal to be tested transmitted by the resource allocation module and complete the test.

2. The multi-channel signal time-division multiplexing monitoring system for radar testing as claimed in claim 1, characterized in that: The signal processing module includes a signal classification unit, and the signal classification unit classifies the signal to be tested into a digital electrical signal, an analog electrical signal, a digital communication signal, and an image telemetry signal according to the signal type.

3. The multi-channel signal time-division multiplexing system for radar testing as claimed in claim 1, characterized in that: The signal processing unit includes a signal amplitude conditioning unit, which conditions the signal to be measured whose voltage amplitude exceeds the measurement threshold, and adjusts the voltage amplitude of the voltage to be measured to a measurable range by using a proportional attenuation method.

4. The multi-channel signal time-division multiplexing monitoring system for radar testing as claimed in claim 2, characterized in that: The resource allocation module includes a two-dimensional matrix switch, wherein the rows of the two-dimensional matrix switch are connected to the test system as output terminals, and the columns of the two-dimensional matrix switch are received as input terminals by the test signal.

5. The multi-channel signal time-division multiplexing monitoring system for radar testing as claimed in claim 4, characterized in that: The test system includes a waveform monitoring module, a voltage acquisition module, a digital communication module and an image telemetry module, and they are respectively connected to different rows of the two-dimensional matrix switch, wherein: The waveform monitoring module is used to realize the electrical signal acquisition and waveform monitoring of the signal to be tested; The voltage acquisition module is used to acquire the voltage or resistance of the signal to be measured; The digital communication module is used for communication between the product under test and the test system; The image telemetry module is used for high-speed transmission of image data.

6. The multi-channel signal time-division multiplexing monitoring system for radar testing as claimed in claim 5, characterized in that: The waveform monitoring module comprises: A programmable digital oscilloscope, wherein the input end of the programmable digital oscilloscope is used to receive the signal to be tested, and the number of the input ends is 1 to 4.

7. The multi-channel signal time-division multiplexing system for radar testing as claimed in claim 5, characterized in that: The communication protocol adopted by the digital communication module includes any one of RS422, CAN, and 1553B.

8. The multi-channel signal time-division multiplexing monitoring system for radar testing as claimed in claim 5, characterized in that: The image telemetry module uses high-speed Ethernet to achieve high-speed image data transmission.

9. The method for using the multi-channel signal time-division multiplexing detection system for radar testing according to any one of claims 1 to 8, characterized in that: include: Step S1: Initializing the monitoring system to ensure the normal state of the monitoring system; Step S2: After the product under test is powered on, a monitoring item is selected, and resources are allocated to the test system and the signal under test; Step S3: According to a predetermined procedure, the control module controls the resource allocation module to sequentially complete the automatic switching between the signal to be tested and the output end of the test system, and complete waveform monitoring and voltage and resistance measurement; Step S4: After the test is completed, the power to the product under test is turned off.

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