One-driving-four detection instrument expansion box based on matrix circuit

Abstract

The utility model relates to the technical field of automatic testing, and particularly discloses a one-to-four detection instrument expansion box based on a matrix circuit, which comprises an expansion box body, the expansion box body comprises a power supply interface main switch, four Weibo circuits, four product power supplies, a backboard, four matrix boards, a system power supply, a calibration interface board, a test resource board, four branch control switches, four gating indicating lamps and four voltage and current acquisition modules. The test resources of the detector are accurately distributed to the four tested products, the problem of uneven resource distribution of traditional test equipment is solved, each tested product can obtain sufficient and appropriate test resources, the test efficiency is greatly improved, meanwhile, the flexibility of the system is enhanced by adopting an independent power supply control mechanism, and the test cost is reduced. And each path of tested product has independent power supply control and can be flexibly adjusted according to specific requirements, so that not only is the test precision improved, but also conflicts and interferences of test resources are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automated testing, and particularly relates to a one-to-four detection instrument expansion box based on a matrix circuit. Background Art

[0002] With the rapid development of technology, the testing requirements for electronic products are increasing day by day, especially in the aerospace, military, and high-end manufacturing industries. These fields have extremely high requirements for the accuracy, reliability, and automation level of testing equipment. Traditional testing equipment often adopts a single testing architecture and can only test one product under test at a time. This is inefficient when facing large-scale production and complex system testing and cannot meet the needs of rapid iteration and multi-task parallel processing.

[0003] In a multi-channel testing environment, signal interference and crosstalk may affect the testing accuracy and reliability. As the testing load increases, the heat dissipation problem inside the expansion box may become a bottleneck restricting its performance. In addition, the current expansion box products still require manual intervention for setting and adjustment when switching channels, which limits the realization of full automation. Therefore, to solve the above problems, we propose a one-to-four detection instrument expansion box based on a matrix circuit. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a one-to-four detection instrument expansion box based on a matrix circuit, which solves the technical problems that in a multi-channel testing environment, signal interference and crosstalk may affect the testing accuracy and reliability, and as the testing load increases, the heat dissipation problem inside the expansion box may become a bottleneck restricting its performance. In addition, the current expansion box products still require manual intervention for setting and adjustment when switching channels, which limits the realization of full automation.

[0006] (2) Technical Solutions

[0007] To achieve the above objectives, the utility model is realized through the following technical solutions:

[0008] A four-channel detection instrument expansion box based on a matrix circuit, comprising an expansion box body, which includes a main power switch for the power interface, four VIBOs, four product power supplies, a backplane, four matrix boards, a system power supply, a calibration interface board, a test resource board, four branch control switches, four strobe indicators, and four voltage and current acquisition modules. Four DUTs (Devices Under Test) are connected to the expansion box body, and a detector body is provided on the expansion box body. The MCU addresses of the four VIBOs are 0x01, 0x02, 0x03, and 0x04 respectively, and the MCU addresses of the four matrix boards are 0x11, 0x12, 0x13, and 0x14 respectively. The expansion box body uses a 3U aviation chassis as the outer frame, and the inside of the expansion box body uses a standard 19-inch VPX chassis with a depth of 200 mm. The bottom plate of the expansion box body is specially extended to 405 mm. Four 3U10HP panels and two 3U5HP panels are installed on the front panel of the VPX chassis of the expansion box body. The branch control switches are combined with the strobe indicators. Each module in the expansion box body is interconnected through an RS485 communication bus, and the detector body, as the host, periodically polls each module.

[0009] Preferably: The VPX chassis of the expansion box body is not directly connected to the chassis rear panel, but is directly fixed to the aviation chassis and has heat dissipation holes. Physical switches and indicators are integrated on each of the four matrix boards.

[0010] Preferably: The backplane serves as the connection hub for each module in the expansion box. The calibration interface board is used for the calibration and maintenance of the expansion box. A cooling fan and a protective net are installed inside the expansion box body.

[0011] (III) Beneficial Effects

[0012] First, by introducing a matrix circuit, the precise allocation of the detector's test resources to four DUTs is achieved, solving the problem of uneven distribution of resources in traditional test equipment. This enables each DUT to obtain sufficient and appropriate test resources, greatly improving the test efficiency. At the same time, the adoption of an independent power control mechanism enhances the flexibility of the system. Each DUT has an independent power control and can be flexibly adjusted according to specific requirements, not only improving the test accuracy but also reducing the conflicts and interferences of test resources.

[0013] Second, the expansion box body also has prominent advantages. Its modular design concept makes each module independent, facilitating maintenance and upgrading. When a module fails, it can be quickly located and replaced without affecting the normal operation of other modules, significantly shortening the equipment maintenance time. At the same time, the reserved expansion interfaces enable the equipment to have strong scalability. According to actual needs, more test resources or functional modules can be easily added to adapt to changing test requirements and enhance the adaptability and flexibility of the equipment. Description of the Drawings

[0014] The above description is only an overview of the technical solution of the present utility model. In order to better understand the technical means of the present utility model and implement it in accordance with the content of the specification, the following will be described in detail with reference to the preferred embodiments of the present utility model and the accompanying drawings.

[0015] Figure 1 It is a structural diagram of the expansion box of the present utility model;

[0016] Figure 2 It is a structural diagram of the matrix board detection link of the present utility model;

[0017] Figure 3 It is a system structural diagram of the mainframe polling of the present utility model.

[0018] Legend description: 1. Expansion box; 11. Total power switch of the power interface; 12. Weibo; 13. Product power supply; 14. Backplane; 15. Matrix board; 16. Product under test; 17. System power supply; 18. Calibration interface board; 19. Test resource board; 2. Detector body. Detailed implementation manners

[0019] By providing an expansion box for a one-to-four detection instrument based on a matrix circuit in the embodiments of the present application, the technical problems that in a multi-channel test environment, signal interference and crosstalk may affect the test accuracy and reliability, as the test load increases, the heat dissipation problem inside the expansion box may become a bottleneck restricting its performance, and in addition, the current expansion box products still require manual intervention for setting and adjustment when switching channels, which restricts the realization of full automation are effectively solved.

[0020] Embodiment

[0021] According to Figure 1 and Figure 2 As shown, the technical solution in the embodiments of the present application effectively solves the technical problems that in a multi-channel test environment, signal interference and crosstalk may affect the test accuracy and reliability, as the test load increases, the heat dissipation problem inside the expansion box may become a bottleneck restricting its performance, and in addition, the current expansion box products still require manual intervention for setting and adjustment when switching channels, which restricts the realization of full automation. The general idea is as follows:

[0022] In view of the problems existing in the prior art, the utility model provides a one-to-four detection instrument expansion box based on a matrix circuit, which includes an expansion box body 1. The expansion box body 1 includes a power interface main switch 11, four Weibos 12, four product power supplies 13, a backplane 14, four matrix boards 15, a system power supply 17, a calibration interface board 18, a test resource board 19, four branch control switches, four strobe indicators and four voltage and current acquisition modules. Four tested products 16 are connected to the expansion box body 1, and a detector body 2 is arranged on the expansion box body 1. The MCU addresses of the four Weibos 12 are 0x01, 0x02, 0x03 and 0x04 respectively, and the MCU addresses of the four matrix boards 15 are 0x11, 0x12, 0x13 and 0x14 respectively. The expansion box body 1 uses a 3U aviation chassis as the outer frame to provide necessary mechanical protection. The inside of the expansion box body 1 uses a standard 19-inch VPX chassis with a depth of 200 mm. The bottom plate of the expansion box body 1 is specially lengthened to 405 mm to meet the installation requirements of key components such as power modules and Weibos. Four 3U10HP panels and two 3U5HP panels are installed on the front panel of the VPX chassis of the expansion box body 1, and a cable extractor is equipped to improve the convenience of use and maintenance. The branch control switch is combined with the strobe indicator. Each module in the expansion box body 1 is interconnected through an RS485 communication bus. The detector body 2, as the host, periodically polls each module to ensure the accuracy of data transmission and the stability of the system. The matrix circuit is the core design, responsible for the power-on management, status detection and test resource switching of the product, ensuring that only one tested product is connected to the detector test resources during the test process. Each product circuit is configured with an independent power supply unit to independently control its power-on and power-off, enhancing the flexibility of the system and the test accuracy. The branch control switch is combined with the strobe indicator to achieve precise control and status display of the power-on process of the tested product, forming a series relationship with the virtual switch in the upper computer software.

[0023] The VPX chassis of the expansion box body 1 is not directly connected to the chassis rear panel, but is directly fixed on the aviation chassis and has heat dissipation holes. Physical switches and indicators are integrated on each of the four matrix boards 15. In cooperation with the upper computer software, it realizes dual remote and local control to ensure the transparency and response speed of the test process. The backplane 14 serves as the connection center of each module in the expansion box, providing a stable and reliable signal transmission channel; the calibration interface board is used for the calibration and maintenance of the expansion box to ensure the accuracy and consistency of test data. The calibration interface board 18 is used for the calibration and maintenance of the expansion box. A heat dissipation fan and a protective net are installed in the expansion box body 1 to effectively prevent dust from entering and ensure the stable operation of the equipment in a high-temperature environment, extending the service life of the equipment.

[0024] Working principle:

[0025] When conducting the one - to - four test, the extended box 1 is used to replace the original product under test 16. The test resources of the detector body 2 are accessed, and then through the matrix circuit in the extended box 1, the test resources are allocated to the four products under test 16. The extended box 1 has four independent power supplies, which can be controlled and monitored by the detector body 2. The detector body 2 is connected to the extended box 1 by a cable, and the products under test 16 are connected to the extended box 1 through their respective test cables. The detector body 2 is responsible for outputting the detection tasks and simultaneously controlling the extended box 1. The extended box 1 is responsible for tasks such as simultaneous power - on maintenance, status detection, and test resource switching of the four products under test 16.

[0026] The extended box consists of four Weibos 12, four matrix boards 15, four branch control switches, four strobe indicators, four voltage - current acquisition modules, four product power supplies 13, a system power supply 17, a backplane 14, a calibration interface board 18, a test resource board 19, a power interface master switch 11, and other parts.

[0027] In the structural design of the extended box 1, a 3U aviation chassis is selected as its outer frame. This aviation chassis provides the necessary mechanical protection and is suitable for use in various environments. The internal core structure uses a standard 19 - inch VPX chassis with a depth of 200mm. This chassis has modularity and scalability, which is beneficial to the hardware implementation of the extended box 1. To adapt to specific hardware installation requirements, the bottom plate of the VPX chassis is specially extended to 405mm, which provides sufficient installation space for key components such as power modules and Weibos 12. Four 3U10HP panels and two 3U5HP panels are installed on the front panel of the VPX chassis to maximize the use of space while maintaining the compact arrangement of the modules. To improve functions and enhance the user experience, all the above - mentioned panels are equipped with ejectors, which improves use and maintenance and reduces operation risks. In addition, supplementary panels for power sockets and cooling fans are also installed on the chassis.

[0028] In the hardware design of the extended box 1, power supply and test resource allocation are mainly considered. In the design of the hardware architecture, the core of the design is the branch matrix board 15, which is not only responsible for managing the power - on process of the products but also ensures that during the test process, the selected product under test 16 can be accurately connected to the test resources of the detector body 2. This design strategy allows each product path to be configured with an independent power supply unit, thus providing each product under test 16 with the ability to independently control its power - on and power - off. The independent control mechanism enhances the flexibility of the system and the accuracy of the test process. During the execution stage of the test operation, the branch matrix board 15 ensures that at any moment, only all the test pins of one product under test 16 are connected to the detector body 2, while the other products under test 16 remain in the disconnected state. This mechanism effectively avoids test resource conflicts and interferences, ensuring the accuracy and reliability of the test data.

[0029] In the design of the control and display system, each line of the matrix board 15 is equipped with physical switches and indicator lights to achieve precise control of the power-on process of the product under test 16 and status display. These switches are in series with the virtual switches in the host computer software, ensuring that the product can only be powered on when both the physical switch and the software switch are in the on state. In addition, the branch indicator lights on the matrix board 15 are responsible for the function of displaying the test status in real time, and can intuitively reflect the current gating state of the software, that is, clearly indicate the specific branch under test and its corresponding product under test 16. This design enables the operator to quickly identify and monitor each link in the test process, thereby optimizing the transparency and response speed of the test process.

[0030] In the field of system control communication design, an efficient and reliable communication protocol is adopted to ensure seamless data exchange between the expansion box 1 and the detector body 2. Each module in the expansion box 1 is interconnected through a single RS485 communication bus, which simplifies the wiring complexity and improves the stability and expandability of the system. In this communication architecture, each module has a unique address identifier, thus ensuring the accuracy of data transmission and avoiding the possibility of address conflicts. Specifically for address allocation, the four microcontroller units (MCUs) of Weibohao 12 are respectively assigned addresses 0x01, 0x02, 0x03, and 0x04, and the MCUs of the four matrix boards 15 respectively correspond to addresses 0x11, 0x12, 0x13, and 0x14. In addition, the system adopts a host polling communication mechanism, that is, the detector body 2 serves as the host and periodically sends query signals to each module in the expansion box. Each module responds to the corresponding request according to the address. This polling method not only ensures the orderliness of communication, but also improves the response speed and data processing efficiency of the system.

Claims

1. A one-to-four detection instrument expansion box based on a matrix circuit, comprising an expansion box body (1), wherein the expansion box body (1) comprises a power interface main switch (11), four webers (12), four product power supplies (13), a backplane (14), four matrix boards (15), a system power supply (17), a calibration interface board (18), a test resource board (19), four branch control switches, four selection indicator lights and four voltage and current acquisition modules, characterized in that: Four test products (16) are connected to the expansion box (1), and a detector body (2) is arranged on the expansion box (1). The MCU addresses of the four Weibo (12) are 0x01, 0x02, 0x03 and 0x04 respectively, and the MCU addresses of the four matrix boards (15) are 0x11, 0x12, 0x13 and 0x14 respectively. The expansion box (1) adopts a 3U aviation chassis as an outer frame, and the interior of the expansion box (1) adopts a standard 19-inch VPX chassis with a depth of 200 mm. The bottom plate of the expansion box (1) is specially lengthened to 405 mm. Four 3U10HP panels and two 3U5HP panels are installed on the front panel of the VPX chassis of the expansion box (1). The branch control switch is combined with a selection indicator light. The modules in the expansion box (1) are interconnected through an RS485 communication bus, and the detector body (2) acts as a host to periodically poll the modules.

2. The one-to-four detection instrument expansion box based on matrix circuit according to claim 1 is characterized in that: The VPX chassis of the expansion box (1) is not directly connected to the chassis rear panel, but is directly fixed on the aviation chassis, and has heat dissipation holes.

3. The one-to-four detection instrument expansion box based on matrix circuit according to claim 2 is characterized in that: Physical switches and indicator lights are integrated on the four matrix boards (15).

4. The one-to-four detection instrument expansion box based on matrix circuit according to claim 3 is characterized in that: The backplane (14) serves as a connection hub for each module in the expansion box.

5. The one-to-four detection instrument expansion box based on matrix circuit according to claim 4 is characterized in that: The calibration interface board (18) is used for calibration and maintenance of the expansion box.

6. The one-to-four detection instrument expansion box based on matrix circuit according to claim 5, characterized in that: A cooling fan and a protective net are installed in the expansion box (1).

Images