Portable multifunctional single board test tool

Abstract

This invention provides a portable, multifunctional single-board testing fixture, comprising: an interface test box, a host computer, a main control box, a universal test base plate, and test cables. Both the interface test box and the main control box are communicatively connected to the host computer via the test cables. The universal test base plate is equipped with a main control box connector and a board-under-test (BUT) connector, used to connect the main control box and the BUT, respectively. The interface test box includes a digital signal source, an analog signal source, an RS422 signal source, and an HB6096 signal source, and has a built-in matrix splicing system for switching and adjusting the various signal sources within the interface test box. The BUT connectors include a 16-bit internal bus connector, an 8-bit internal bus connector, and an IO control connector. The test cables are compatible with different connector pin definitions, allowing for detachable switching between different connectors. This invention's testing fixture is highly functional, improves testing efficiency, and is small in size, lightweight, and easy to carry.

Description

Technical Field

[0001] This invention relates to the field of avionics and communication technology, specifically to a portable, multifunctional single-board test fixture that integrates an intelligent diagnostic system and intelligent signal simulation. Background Technology

[0002] Flight parameter acquisition systems involve various acquisition boards. Based on signal type, these boards can be categorized as discrete / frequency signal interfaces, analog signal interfaces, bus signal interfaces, host computer interfaces, and audio / video signal interface modules. Flight parameter acquisition systems have numerous interconnecting interfaces on their acquisition boards. Current testing methods, such as "board testing + system testing," present several problems, including: 1) Low board testing efficiency and incomplete interface coverage; some interfaces can only be completed through system testing, leading to greater costs if design flaws are only discovered during system testing; 2) System testing only allows for functional testing, not boundary testing, leaving some reserved functions untested and creating potential problems for subsequent field parameter additions and board borrowing; 3) Communication issues between some boards are difficult to troubleshoot, impacting testing efficiency; 4) Different types of acquisition boards require different signal sources and test cables.

[0003] With the development of intelligent systems, existing data acquisition boards cannot maintain a consistent number of interfaces, the internal bus interaction methods are no longer unique, and the types of signals acquired are no longer singular, with an increasing number of special signal types. Therefore, based on the above analysis, existing testing methods have many shortcomings. To accelerate board debugging, improve overall system testing efficiency, and ensure the adequacy of testing, it is particularly important to develop board-level testing fixtures that can intelligently detect board fault types and locate component faults. Summary of the Invention

[0004] In view of this, the present application provides a portable multifunctional single-board test fixture. This test fixture integrates an intelligent diagnostic system and intelligent signal simulation, which solves the significant problems of existing fixtures being cumbersome and heavy, having a single type of test signal, and being unable to fully test, making the test fixture more portable and intelligent, and meeting the board-level testing needs in the field of avionics and communications.

[0005] This application provides the following technical solution: a portable multi-functional single-board testing fixture, comprising: an interface testing box, a host computer, a main control box, a universal testing baseboard, and testing cables;

[0006] Both the interface test box and the main control box are connected to the host computer via the test cable. The general test base plate is provided with a main control box connector and a test board connector, which are used to connect the main control box and the test board, respectively.

[0007] The interface test box includes a digital signal source, an analog signal source, an RS422 signal source, and an HB6096 signal source. The interface test box also has a built-in matrix splicing system, which is used to switch and adjust the various signal sources in the interface test box.

[0008] The connectors of the board under test include a 16-bit internal bus connector, an 8-bit internal bus connector, and an IO control connector; the test cable is adapted to different connector pin definitions and can switch between different connectors in a detachable manner.

[0009] Furthermore, the host computer is equipped with general test signal source host computer software, which includes excitation simulation software for selecting different types of signal sources and freely combining them through the matrix splicing system built into the interface test box to suit different types of boards under test.

[0010] Furthermore, the matrix splicing system obtains the signal configuration information loaded by the host computer via Ethernet. The matrix splicing system parses the signal configuration information, assigns values ​​to the registers of the underlying driver, and controls the enable terminal of the relay through the registers to recombine and output different input signals from the host computer.

[0011] Furthermore, the host computer is equipped with an intelligent diagnostic system, which includes a diagnostic unit and a display unit. The diagnostic unit is used to analyze and judge the signal characteristics of the tested board, detect and locate the functional faults of the tested board, and the display unit is used to display the detected fault information.

[0012] Furthermore, the switching signal source includes a switching frequency signal source, and the analog signal source includes a DC analog audio signal source, an AC analog signal source, and an analog output signal source.

[0013] Furthermore, the matrix splicing system is connected to the digital signal source, analog signal source, RS422 signal source and HB6096 signal source via the GJB289A bus.

[0014] Furthermore, it also includes a power conversion box, which is used to convert the power supply voltage and provide the converted power to the universal test base plate.

[0015] Furthermore, the interface test box is also communicatively connected to the universal test base plate via the test cable.

[0016] Furthermore, the interface test box is equipped with a 24V power adapter to power the interface test box.

[0017] Compared with the prior art, the beneficial effects achieved by at least one of the above-mentioned technical solutions adopted in the embodiments of this specification include at least the following: The embodiments of this invention are portable multifunctional single-board test fixtures that integrate intelligent diagnostic systems and intelligent signal simulations. They effectively solve the defects of low single-board testing efficiency, incomplete interface coverage, and the fact that some interfaces can only be tested using the entire machine. At the same time, they greatly reduce the workload of developers, improve work efficiency, and reduce the possibility of errors. Furthermore, the test fixture of this invention is small in size, lightweight, and easy to carry. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the portable single-board testing fixture system according to an embodiment of the present invention;

[0020] Figure 2 This is a block diagram illustrating the internal workings of the DC analog audio signal in an embodiment of the present invention.

[0021] Figure 3 This is a block diagram illustrating the internal workings of the RS422 bus signal in an embodiment of the present invention.

[0022] Figure 4 This is a block diagram illustrating the internal workings of the main control module in an embodiment of the present invention.

[0023] Figure 5 This is a block diagram of the test base plate in an embodiment of the present invention. Detailed Implementation

[0024] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments, providing a clear and complete description of the technical solutions of the present invention. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] like Figures 1-5As shown, this embodiment of the invention provides a portable multifunctional single-board testing fixture, including: an interface testing box, a host computer, a main control box, a universal testing baseboard, a power conversion box, and a test cable;

[0027] Both the interface test box and the main control box are communicatively connected to the host computer via the test cable. The general-purpose test base plate is provided with a main control box connector and a board under test connector, which are used to connect the main control box and the board under test, respectively. The interface test box is also communicatively connected to the general-purpose test base plate via the test cable.

[0028] The interface test box may include a switching frequency signal source, a DC analog audio signal source, an AC analog signal source, an analog output signal source, a power conversion module, an RS422 signal source, and an HB6096 signal source. The interface test box also includes a built-in matrix splicing system for switching and adjusting the various signal sources within the box. The interface test box is equipped with a 24V power adapter. The matrix splicing system is connected to the switching frequency signal source, DC analog audio signal source, AC analog signal source, analog output signal source, RS422 signal source, and HB6096 signal source via a GJB289A bus.

[0029] The connectors of the board under test include a 16-bit internal bus connector, an 8-bit internal bus connector, and an IO control connector; the test cable is compatible with different connector pin definitions, and different connectors can be switched detachably. The power conversion box is used to convert the power supply voltage and provide the converted power to the universal test baseboard.

[0030] In embodiments of the present invention, such as Figure 1 As shown, the switching frequency signal source is based on a SoC platform and can output 80 discrete signals, 1 of which can be specially set, 4 of which are frequency signals and 2 of which are pulse signals.

[0031] The AC analog signal source, based on the SoC platform, can output two 115V AC signals, one AC ratio signal for excitation, two ratio signals, one synchronizer signal for excitation, three sets of output synchronizer signals (X, Y, and Z three-phase signals constitute one set), and four sets of RVDT signals.

[0032] The DC analog audio signal source, based on the SoC platform, can output 4 DC -50V to 50V signals; 60 DC -10V to 10V signals; 4 sinusoidal audio signals; 8 DC -800mV to 800mV signals; 1 signal can be specially configured; and 8 current signals of -40mA to 40mA.

[0033] The RS422 signal source, based on a SoC platform, can output 32 full-duplex RS422 signals with an adjustable baud rate of 9600bps to 921600bps; it also includes two output and two input Harvard code bus signals.

[0034] In addition, the HB6096 signal source built on the SoC platform is a bus signal with a configurable communication rate, including 48 outputs and 8 inputs.

[0035] The interface test box of this invention contains multiple types of excitation signals, which is flexible and can meet the testing requirements of different types of acquisition boards.

[0036] The main control module in the main control box has a 16-bit parallel read / write interface and a time stamp transmission interface.

[0037] The host computer communicates with the interface test box to control the signal transmission of the interface test box; the host computer also communicates with the main control box to receive data from the main control box and send commands to the main control box.

[0038] The interface test box of this invention provides a freely combinable intelligent signal simulation device. Through the built-in matrix splicing system, it can freely combine different types of discrete signals, analog signals, RS422 bus signals, HB6096 bus signals, audio signals, etc., to meet the single board's testing needs for different types of signals and overcome the deficiency of only being able to test a single signal.

[0039] In a specific embodiment of the present invention, the host computer is equipped with general-purpose test signal source host computer software. This software includes excitation simulation software, used to select different types of signal sources and freely combine them through the matrix splicing system built into the interface test box to suit different types of boards under test. The excitation simulation software also includes program loading and configuration loading for the signal source processor. This invention enables the free combination of multiple types of signals through excitation simulation software, allowing for complete testing of the entire board's acquisition function.

[0040] In a specific embodiment of the present invention, the host computer is further provided with an intelligent diagnostic system, which includes a function for testing the functional faults of the single board, a function for accurately locating the faults of components, and intelligent display, etc., for verifying the acquisition function of the single board, troubleshooting components and providing fault warnings, thereby improving the testing efficiency of the single board.

[0041] Specifically, the intelligent diagnostic system includes a diagnostic unit and a display unit. The diagnostic unit is used to analyze and judge the signal characteristics of the tested board, detect and locate the functional faults of the tested board, and the display unit is used to display the detected fault information.

[0042] The test cable in this embodiment of the invention is suitable for transmitting different types of signal sources and can test acquisition boards with diverse and complex signal types, rather than being limited to acquisition boards with single signals. At the same time, the connectors included in the test cable are freely detachable and are suitable for different connector pin definitions, which can realize the universality of the cable and reduce the cost of test fixtures.

[0043] In addition, in one embodiment of the present invention, the main control box is provided with maintenance software for functions such as program loading, configuration loading, data acquisition, display, and local storage of data for the main control box processor.

[0044] Next, in conjunction with the appendix Figure 1-5 The embodiments of the present invention will be further described below.

[0045] like Figure 1 As shown, this portable multi-functional single-board testing fixture consists of an interface test box (including a 24V power adapter), a host computer (including general-purpose test signal source host computer software), a general-purpose test baseboard, a power conversion box (including a 24V power adapter), and test cables (including connectors). The 24V power adapter provides power to the interface test box, which is used to provide different types of signal sources, including digital signals, analog signals, RS422 bus signals, and HB6096 bus signals. The built-in matrix splicing system is configured and loaded via a PC. The interface test box can output different combinations of signal sources; for example, the first 10 output signals can be digital signals, channels 10-20 can be set to analog signals, channels 20-25 can be set to RS422 bus signals, and channels 25-30 can be set to HB6096 bus signals. Depending on the different signals acquired by the test board, the configuration can be modified via PC and loaded into the built-in matrix splicing system of the interface test box to adjust the output signals, including the output signal type and the number of signal channels, all of which can be configured and freely combined.

[0046] The interface test box includes a switching / frequency signal source and a DC analog audio signal source, such as... Figure 2 As shown, there are AC analog signal source, analog output signal source, power conversion module, and RS422 signal source, as follows. Figure 3 As shown, the system includes an HB6096 signal generator, a GJB289A bus, and a built-in matrix splicing system.

[0047] like Figure 2As shown, the DC analog audio signal source, built on a SoC platform, can output 64 channels of large DC analog signals. Of these, 60 channels have a DC voltage range of -10V to 10V, and 4 channels have a DC voltage range of -50V to 50V. It outputs 4 audio signals with a voltage range of 0V to 50V (peak) and a frequency range of 20 to 20kHz. It also outputs 8 small DC signals with a signal range of -800mV to 800mV. One of these small signals can be superimposed with a 0 to 50V common-mode voltage (50V to ground at the negative terminal, and a differential voltage of -800mV to 800mV). Another signal is programmable and can be superimposed with a sinusoidal AC signal, with an adjustable frequency of 0 to 40Hz and an adjustable amplitude of 0 to 800mV. Finally, it outputs 8 current signals ranging from -40mA to 40mA. The audio signals, small signals, and current signals can be externally connected via reserved interfaces. Figure 2 The reserved interfaces shown include small signal voltage interfaces, current interfaces, and audio signal interfaces. These are internally connected via a direct connection. When the interface under test has these circuits, an external DC voltage source, signal generator, or other equipment can be used. Wiring holes are provided on the outside of the test box. For -10V to +10V signals, a one-to-many parallel connection is used to transmit the signal. To prevent crosstalk between analog channels from being undetectable, the analog voltage transmitted by adjacent channels should increase or decrease in a stepwise manner during signal transmission. The test box obtains the transmission configuration information (configuration format to be determined) from the PC via Ethernet and transmits according to the set voltage value based on the configuration information. Voltage test holes are provided on the test box, and calibration settings can be performed via PC maintenance software.

[0048] like Figure 3 As shown, the RS422 signal generator, built on a SoC platform, can output 32 full-duplex RS422 signals with an adjustable baud rate of 9600bps to 921600bps. It also includes two output and two input Harvard code bus signals. Configuration information (configurable format) is obtained from a PC via Ethernet. Based on the configuration information, the generator receives and sends bus data for the corresponding channels according to the set baud rate, transmission period, and verification method. The received bus data can be displayed on the PC in real time (communication format configurable).

[0049] The built-in matrix splicing system can switch and rearrange diverse input signals from the system front end without attenuating the signals. The built-in matrix splicing system obtains the signal configuration information loaded by the PC via Ethernet. By parsing the configuration information, the built-in matrix splicing system assigns values ​​to the registers of the underlying driver and controls the enable terminals of the relays through the registers, thereby achieving the recombination and output of diverse input signals from the front end.

[0050] The main function of the test cable containing the new connector is to transmit the signal output from the interface box to the universal test base plate, such as... Figure 5 As shown, the primary function of this test cable is to transmit various types of signal sources, not limited to a single signal. The connectors included in the test cable are detachable and adaptable to different connector pin definitions, offering versatility. For a universal test baseboard, when the board under test (DUT) is based on a 16-bit backplane bus, the switch board, analog board, and bus board are inserted through connector X1, and the main control box is inserted through connector X4. The main control box's power supply line is connected, and the signal source is connected through the connector. The power supply box is then activated to power both the DUT and the main control box. When the DUT is based on an 8-bit backplane bus, the switch board, analog board, and bus board are inserted through connector X2, and the main control box is inserted through connector X5. The main control box's power supply line is connected, and the signal source is connected through the connector. The power supply box is then activated to power both the DUT and the main control box. When the DUT has no processor, it is inserted through connector X3. The signal source is connected through the connector, and the power supply box is activated to power the DUT.

[0051] The main control box is designed for compatibility. By loading different software, it can communicate with the board under test via both a 16-bit and an 8-bit backplane bus, and can also directly control the board under test via I / O. The hardware block diagram of the main control box is as follows. Figure 4 As shown, when the board under test is a 16-bit backplane bus board, the main control box communicates with the carrier board through connector 1; when the board under test is an 8-bit backplane bus board, the main control box communicates with the carrier board through connector 2; when the board under test is a board without a CPU, the main control box communicates with the carrier board through connector 3.

[0052] In testing boards without CPUs, considering the inconsistency in the PL port orientation settings of SoCs for different types of conditioning boards, to avoid device damage caused by IO port conflicts, a 33Ω resistor needs to be connected in series with each control line when designing the external ports of the main control box.

[0053] The intelligent diagnostic system records signal characteristics such as voltage, current, and resistance of the test board, extracting significant feature values ​​from minute local components to establish fault parameters, build a fault model, and use intelligent recognition algorithms for calculation, identification, and judgment to further determine the fault type. This improves the efficiency of functional circuit testing on the test board and accurately locates faulty components. Simultaneously, it can also perform precise verification of functional circuits through logical judgment and test the boundary values ​​of the test board, effectively improving the testability of the single board.

[0054] The test fixture of this invention has scalability in the number of signal sources, which can meet future needs and effectively solve the defects of low single-board testing efficiency, incomplete interface coverage, and the fact that some interfaces can only rely on whole-system testing. This test fixture greatly improves the testing efficiency of single boards, reduces the hardware troubleshooting time of developers, improves the testing efficiency of the whole system, and is small in size, light in weight, and easy to carry.

[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A portable multifunctional single-board testing fixture, characterized in that, include: Interface test box, host computer, main control box, general test base plate, test cable; Both the interface test box and the main control box are connected to the host computer via the test cable. The general test base plate is provided with a main control box connector and a test board connector, which are used to connect the main control box and the test board, respectively. The interface test box includes a digital signal source, an analog signal source, an RS422 signal source, and an HB6096 signal source. The interface test box also has a built-in matrix splicing system, which is used to switch and adjust the various signal sources in the interface test box. The connectors of the board under test include a 16-bit internal bus connector, an 8-bit internal bus connector, and an IO control connector; the test cable is compatible with different connector pin definitions and can switch between different connectors in a detachable manner. The host computer is equipped with general test signal source host computer software, which includes excitation simulation software for selecting different types of signal sources and freely combining them through the matrix splicing system built into the interface test box to suit different types of boards under test. The matrix splicing system obtains the signal configuration information loaded by the host computer via Ethernet. The matrix splicing system parses the signal configuration information, assigns values ​​to the registers of the underlying driver, and controls the enable terminal of the relay through the registers to recombine and output different input signals from the host computer.

2. The portable multifunctional single-board testing fixture according to claim 1, characterized in that, The host computer is equipped with an intelligent diagnostic system, which includes a diagnostic unit and a display unit. The diagnostic unit is used to analyze and judge the signal characteristics of the board under test, detect and locate the functional faults of the board under test, and the display unit is used to display the detected fault information.

3. The portable multifunctional testing fixture according to claim 1, characterized in that, The switching signal source includes a switching frequency signal source, and the analog signal source includes a DC analog audio signal source, an AC analog signal source, and an analog output signal source.

4. The portable multifunctional testing fixture according to claim 1, characterized in that, The matrix splicing system is connected to the digital signal source, analog signal source, RS422 signal source and HB6096 signal source via GJB289A bus.

5. The portable multifunctional single-board testing fixture according to claim 1, characterized in that, It also includes a power conversion box, which is used to convert the power supply voltage and provide the converted power to the universal test base plate.

6. The portable multifunctional single-board testing fixture according to claim 1, characterized in that, The interface test box is also communicatively connected to the universal test base plate via the test cable.

7. The portable multifunctional single-board testing fixture according to claim 1, characterized in that, The interface test box is equipped with a 24V power adapter to power the interface test box.

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