STM32-based distribution automation terminal display module test tool
By designing the STM32 power distribution automation terminal display module test tooling, automated detection of display panels is achieved, solving the problems of low detection efficiency and unstable quality in the existing technology, and improving production efficiency and product quality.
Patent Information
- Application Number
- CN202422476423.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-14
AI Technical Summary
In the existing technology, there is a lack of effective means to detect distribution automation terminal display panels, which leads to quality problems and low efficiency in production, frequent human errors, and difficulty in meeting production and testing standards.
A test fixture for the display module of a power distribution automation terminal based on STM32 is designed. It includes a housing, a transfer switch test area, and a liquid crystal display panel test area. It has built-in STM32 microcontroller circuits, core board circuits, and power supply circuits. The STM32 microcontroller control chip and relay drive circuit are used to realize automatic detection of the display panel.
It improves production efficiency, reduces human errors, ensures product quality, is easy to maintain and manage, can quickly locate problems, reduce scrap rates, and meet testing standards.
Smart Images
Figure CN223362280U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power distribution automation terminals, in particular to a test tool based on an STM32 power distribution automation terminal display module. Background Art
[0002] Distribution automation terminals are intelligent devices installed in distribution networks of 6 kV and above for remote monitoring and control. They offer functions such as data acquisition, control, fault handling, and communication. The technical specifications for distribution automation terminals (DL / T721-202X) cover various requirements, including power supply, structure, communication, and functionality. Structurally, the terminals should feature a modular design, good environmental adaptability, and an adequate level of protection. Regarding communications, distribution automation terminals should support serial and Ethernet communications, include communication monitoring capabilities, and support multiple communication protocols, such as DL / T634.5101 and DL / T 634.5104. In addition to basic data acquisition and control capabilities, the terminals should also include fault handling. The intelligent development of distribution automation terminals is crucial for improving distribution network power supply reliability, enhancing operational efficiency, and reducing operating costs.
[0003] With technological advancements and improved standards, the functionality and performance of distribution automation terminals will continue to improve to meet the development needs of future smart distribution networks. As the market expands, the demand for distribution automation terminals is also increasing. The terminal's display panel, as the window for interaction between people and the terminal, is particularly important. Necessary measures should be taken to inspect it and reduce problems during production. Therefore, there is an urgent need for a device that can detect whether the display panel of a distribution automation terminal meets standards and usage requirements during production. Utility Model Content
[0004] (1) Technical problems solved
[0005] In response to the deficiencies in the prior art, the utility model provides a test fixture for the display module of the STM32 power distribution automation terminal, which has the advantages of improving production efficiency, ensuring product quality, reducing human errors, facilitating maintenance and management, and tracking and solving problems, thereby solving the problems in the background technology.
[0006] (2) Technical solution
[0007] In order to achieve the above advantages of improving production efficiency, ensuring product quality, reducing human errors, facilitating maintenance and management, and tracking and solving problems, the specific technical solutions adopted by this utility model are as follows:
[0008] The test fixture of the display module of the terminal of the STM32 power distribution automation is provided, including a shell, both sides of the shell are provided with a transport port, one side of the transport port is provided with a power socket switch, and the surface of the shell is composed of a transfer switch test area and several LCD panel test areas; wherein, the transfer switch test area includes a transfer switch on / off position indicator light provided on one side of the bottom surface of the shell, and a transfer switch test interface is provided on the top of the transfer switch on / off position indicator light; the LCD panel test area includes an LCD panel test interface provided on the surface of the shell, and a panel selection button switch is provided at the bottom of the LCD panel test interface, and the panel selection button switch is provided at the bottom of the LCD panel test interface. A selection indicator light is provided on one side of the key switch of the board; a test system is provided inside the shell, and the test system is composed of an STM32 single-chip microcomputer circuit, an STM32 core board circuit, a power supply circuit and an open-input and open-output circuit. The output end of the power supply circuit is respectively connected to the input end of the STM32 single-chip microcomputer circuit and the input end of the STM32 core board circuit, the output end of the STM32 single-chip microcomputer circuit and the output end of the STM32 core board circuit are both connected to the input end of the open-input and open-output circuit, and the output end of the open-input and open-output circuit is respectively connected to the input end of the STM32 single-chip microcomputer circuit and the input end of the display panel.
[0009] Furthermore, the STM32 single-chip microcomputer circuit uses the STM32F103C8T6 as the main control chip, and uses 25 I / O ports of the main control chip as input and output; among them, the PA1, PA2 and PA3 pins of the main control chip are used to connect to the first display panel, the PA4, PA5 and PA6 pins are used to connect to the second display panel, the PB15, PA8 and PA9 pins are used to connect to the third display panel, the PA10, PA11 and PA12 pins are used to connect to the fourth display panel, the PB5, PB6, PB7, PB8 and PB9 pins are used for test triggering, the PB0, PB1, PB4 and PB11 pins are used for test selection indication, and the PA7, PB12, PB13 and PB14 pins are used for transfer switch testing.
[0010] Furthermore, the STM32 core board circuit uses STM32H723ZGT6 as the main control chip, and uses the two I / O ports 91 and 92 of the main control chip as the connection with the display panel to be tested through the main board where the single-chip microcomputer is located. The PG6 and PG7 pins of the main control chip are used to connect to the operation indicator light of the liquid crystal display panel, and the GND and VCC pins are used for power supply.
[0011] Furthermore, the power supply circuit includes a power management chip U2, a power management chip U5, a resistor R10, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C15, a capacitor C16, an inductor L1 and a diode D9; wherein the VIN pin of the power management chip U2 is respectively connected to one end of the resistor R10 and one end of the capacitor C5, and the other end of the capacitor C5 is respectively connected to the ON#OFF pin and the GND pin of the power management chip U2 and grounded; the OUT pin of the power management chip U2 is respectively connected to the negative electrode of the diode D9 and one end of the inductor L1, the positive electrode of the diode D9 is grounded, and the other end of the inductor L1 is respectively connected to the FB pin of the power management chip U2, one end of the capacitor C7, one end of the capacitor C6 and the VI pin of the power management chip U5; the GND pin of the power management chip U5 is respectively connected to the other end of the capacitor C6, the other end of the capacitor C7, one end of the capacitor C15 and one end of the capacitor C16 and grounded, and the VO pin of the power management chip U5 is respectively connected to the other end of the capacitor C15 and the other end of the capacitor C16.
[0012] Furthermore, the model of the power management chip U2 is LM2576SX-5.0, and the model of the power management chip U5 is AMS1117-3.3. The diode D9 is an SS54 Schottky diode, and the capacitors C5, C7, and C15 are all electrolytic capacitors.
[0013] Furthermore, the open-input and open-output circuit is composed of 12 groups of relay drive circuits and 5 groups of buttons; the relay drive circuit uses transistors as switches and amplifiers, wherein the base of the transistor is connected to the I / O port of the microcontroller, and a current-limiting resistor is connected in series between the base of the transistor and the I / O port of the microcontroller, the collector of the transistor is connected to a 5V power supply through a relay coil, and a diode is connected in parallel with the coil to provide freewheeling, and the emitter of the transistor is directly grounded; one end of the five groups of buttons are respectively connected to the PB5, PB6, PB7, PB8 and PB9 pins of the main control chip in the STM32 microcontroller circuit, and the other ends are all grounded.
[0014] (3) Beneficial effects
[0015] Compared with the existing technology, the utility model provides a test tool based on the STM32 power distribution automation terminal display module, which has the following beneficial effects:
[0016] (1) The inspection tooling of the present invention has significant advantages in improving production efficiency, ensuring product quality, reducing human errors, facilitating maintenance and management, and tracing and solving problems.
[0017] (2) The present invention uses a detection tool to efficiently and conveniently detect the display panel of the distribution automation terminal, and intuitively feel whether the screen, buttons and indicator lights are normal, thereby significantly improving production efficiency, which is particularly important in mass production.
[0018] (3) The inspection tooling of the present invention can ensure that the product meets all design specifications and manufacturing standards during the production process, and has the characteristics of consistency of inspection means, identifying faults and defects through testing, thereby ensuring the quality and reliability of the product.
[0019] (4) The detection tooling of the present invention can reduce the reliance on manual operation, thereby reducing test misjudgments caused by human factors.
[0020] (5) When a problem is discovered through the tooling, the utility model can quickly locate the source of the problem, facilitate problem tracking and resolution, and reduce product repair and scrap rates. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in 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 paying any creative work.
[0022] Figure 1 This is a structural diagram of a test fixture based on an STM32 power distribution automation terminal display module according to an embodiment of the present utility model;
[0023] Figure 2 This is a schematic diagram of the principle of the test system in the STM32 power distribution automation terminal display module test tool according to an embodiment of the present invention;
[0024] Figure 3 This is a circuit diagram of an STM32 single-chip microcomputer circuit in an STM32 power distribution automation terminal display module test tool according to an embodiment of the present invention;
[0025] Figure 4 It is a circuit diagram of the STM32 core board circuit in the STM32 power distribution automation terminal display module test tool according to an embodiment of the present invention;
[0026] Figure 5 This is a circuit diagram of a power supply circuit in a test tool based on an STM32 power distribution automation terminal display module according to an embodiment of the present invention;
[0027] Figure 6 This is one of the circuit diagrams of the open-input and open-output circuit in the STM32 power distribution automation terminal display module test tool according to an embodiment of the present utility model;
[0028] Figure 7This is the second circuit diagram of the open-input and open-output circuit in the STM32 distribution automation terminal display module test tool according to the embodiment of the present utility model.
[0029] In the picture:
[0030] 1. Housing; 2. Transport port; 3. Power socket switch; 4. Transfer switch on / off position indicator; 5. Transfer switch test interface; 6. LCD panel test interface; 7. Board selection button switch; 8. Selection indicator light. DETAILED DESCRIPTION
[0031] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0032] According to an embodiment of the present utility model, a test tool based on an STM32 power distribution automation terminal display module is provided.
[0033] The purpose of the utility model is to connect the interface of the corresponding display panel through the core board RX / TX and I / O port interface of the terminal, use the core board program to detect whether the display panel screen and the indicator light display are normal, simulate the normal use state of the terminal, and detect multiple display panels by switching the corresponding relays on the tooling mainboard to close or disconnect them. It also adds the function of testing the conversion switch, which can directly display the correctness of the wiring through the indicator light when turning the switch. At the same time, the tooling is designed with a special shell with double-sided carrying ports for easy transportation, and an independent power switch and interface with light for safe use of electricity.
[0034] To achieve the above purpose, the utility model adopts the following technical scheme: 24V to 5V, 3.3V is used as the power supply system, a core board (i.e., STM32 core board circuit) is used as the signal master control, a main board with STM32F103C8T6 welded on it (i.e., STM32 single-chip microcomputer circuit) controls the output and input, and four display board plug-in boards are used as bridges to connect the main board and the display board.
[0035] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 1-Figure 7As shown, according to the embodiment of the utility model, the test tool based on the STM32 power distribution automation terminal display module includes a shell 1, both sides of the shell 1 are provided with a transfer port 2, one side of the transfer port 2 is provided with a power socket switch 3, and the surface of the shell 1 is composed of a transfer switch test area and a plurality of liquid crystal display panel test areas; wherein, the transfer switch test area includes a transfer switch on / off position indicator light 4 arranged on one side of the bottom surface of the shell 1. In specific application, the transfer switch on / off position indicator light 4 corresponds to the I / O port (HW, FW) in the input and output schematic diagram of the mainboard (i.e., the single-chip microcomputer), and is used to indicate The LCD panel to be tested is selected. A switch test interface 5 is provided on the top of the switch on / off position indicator 4. In specific application, the switch test interface 5 corresponds to the wiring terminal (J20) in the input and output schematic diagram of the main board (i.e., the single-chip microcomputer) and is used to test the switch; the LCD panel test area includes an LCD panel test interface 6 provided on the surface of the housing 1. In specific application, the LCD panel test interface 6 corresponds to J1 (GMD_HX, RUNLED, GZD), J2 (UTX_MCU, URX_MCU) in the single-chip microcomputer circuit schematic diagram. ) corresponds to the current selected LCD panel, and is used to test the currently selected LCD panel. A panel selection key switch 7 is provided at the bottom of the LCD panel test interface 6. In specific applications, the panel selection key switch 7 corresponds to the I / O port (KEY1, KEY, KEY3, KEY4) in the input and output schematic diagram of the mainboard (i.e., the single-chip microcomputer), and is used to select the LCD panel you want to test. A selection indicator light 8 is provided on one side of the panel selection key switch 7. In specific applications, the selection indicator light 8 corresponds to the I / O port (PB0, PB1, PB4, PB11) in the single-chip microcomputer schematic diagram, and is used to select the LCD panel you want to test. After the liquid crystal display panel of test, as having selected indication; The inside of housing 1 is provided with a test system, and the test system is composed of an STM32 single-chip microcomputer circuit, an STM32 core board circuit, a power circuit and an open-input open-output circuit, the output of the power circuit is respectively connected with the input of the STM32 single-chip microcomputer circuit and the input of the STM32 core board circuit, the output of the STM32 single-chip microcomputer circuit and the output of the STM32 core board circuit are both connected with the input of the open-input open-output circuit, and the output of the open-input open-output circuit is respectively connected with the input of the STM32 single-chip microcomputer circuit and the input of display panel.
[0036] In one embodiment, the STM32 single-chip microcomputer circuit uses STM32F103C8T6 as the main control chip, and uses 25 I / O ports of the main control chip as input and output; wherein, the PA1, PA2 and PA3 pins of the main control chip are used to connect to the first display panel, the PA4, PA5 and PA6 pins are used to connect to the second display panel, the PB15, PA8 and PA9 pins are used to connect to the third display panel, the PA10, PA11 and PA12 pins are used to connect to the fourth display panel, the PB5, PB6, PB7, PB8 and PB9 pins are used for test triggering, the PB0, PB1, PB4 and PB11 pins are used for test selection indication, and the PA7, PB12, PB13 and PB14 pins are used for transfer switch testing.
[0037] Specifically, if Figure 3 The schematic diagram of the STM32 microcontroller circuit is shown. As can be seen from the figure, it uses the STM32F103C8T6 as the main control chip. This circuit uses the microcontroller's 25 I / O ports for input and output. The core board and the display panel being tested are connected via the mainboard where the microcontroller resides. Using RX / TX connections, four display panels can be connected simultaneously. PA1 to PA3 connect to the first display panel, PA4 to PA6 connect to the second display panel, PB15, PA8, and PA9 connect to the third display panel, and PA10 to PA12 connect to the fourth display panel. PB5 to PB9 serve as test triggers, PB0, PB1, PB4, and PB11 serve as test selection indicators, and PA7, PB12, PB13, and PB14 serve as transfer switches for testing.
[0038] In one embodiment, the STM32 core board circuit uses STM32H723ZGT6 as the main control chip, and uses the two I / O ports 91 and 92 of the main control chip as the mainboard transfer with the display panel to be detected through the single-chip microcomputer. The PG6 and PG7 pins of the main control chip are used to connect to the operation indicator light of the liquid crystal display panel, and the GND and VCC pins are used for power supply.
[0039] Specifically, if Figure 4 The core board circuit schematic is shown below. As can be seen, the STM32H723ZGT6 serves as the main control chip. This circuit uses the chip's I / O ports 91 and 92 as a transfer to the display panel being tested via the motherboard where the microcontroller resides, using RX / TX connections. Pins 39 and 42 of the chip are connected to the LCD panel's operating indicator light, allowing the panel to illuminate during normal startup to verify the normal operation of the indicator light. The core board is plugged into the motherboard via a socket, and the motherboard's power supply circuit supplies power to the core board via pins 1 and 3, enabling the core board to operate.
[0040] In one embodiment, the power supply circuit includes a power management chip U2, a power management chip U5, a resistor R10, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C15, a capacitor C16, an inductor L1 and a diode D9; wherein the VIN pin of the power management chip U2 is respectively connected to one end of the resistor R10 and one end of the capacitor C5, and the other end of the capacitor C5 is respectively connected to the ON#OFF pins and the GND pin of the power management chip U2 and grounded; the OUT pin of the power management chip U2 is respectively connected to the cathode of the diode D9 and one end of the inductor L1, the anode of the diode D9 is grounded, and the other end of the inductor L1 is respectively connected to the FB pin of the power management chip U2, one end of the capacitor C7, one end of the capacitor C6 and the VI pin of the power management chip U5; the GND pin of the power management chip U5 is respectively connected to the other end of the capacitor C6, the other end of the capacitor C7, one end of the capacitor C15 and one end of the capacitor C16 and grounded, and the VO pin of the power management chip U5 is respectively connected to the other end of the capacitor C15 and the other end of the capacitor C16. The power management chip U2 is LM2576SX-5.0, and the power management chip U5 is AMS1117-3.3. Diode D9 is an SS54 Schottky diode, and capacitors C5, C7, and C15 are all electrolytic capacitors.
[0041] Specifically, if Figure 5 The power supply circuit schematic is shown below. This circuit design outputs two voltage systems: a 5V circuit system that powers the core board and relays, and a 3.3V system that powers the microcontroller (STM32F103C8T6). The 5V system uses the LM2576SX-5.0 DC-DC power management chip, while the 3.3V system uses the AMS1117-3.3 DC-DC power management chip. A 470uF electrolytic capacitor is added to the power input as a bypass capacitor to provide energy storage and filter out high-frequency signal interference. An SS54 Schottky diode and a 1000uF capacitor are added to the 5V output pin to prevent reverse connection, thereby protecting the downstream load, and to filter out low-frequency signal disturbances, improving system output stability. The input of the 3.3V power supply chip is connected to the output of the 5V power supply chip, and two capacitors, 10uF and 100nF, are added to the output to filter out high-frequency and low-frequency interference, respectively.
[0042] In one embodiment, the open-input and open-output circuits are composed of 12 groups of relay drive circuits and 5 groups of buttons; the relay drive circuit uses transistors as switches and amplifiers, wherein the base of the transistor is connected to the I / O port of the microcontroller, and a current-limiting resistor is connected in series between the base of the transistor and the I / O port of the microcontroller, the collector of the transistor is connected to a 5V power supply through a relay coil, and a diode is connected in parallel with the coil to provide freewheeling, and the emitter of the transistor is directly grounded; one end of the five groups of buttons are respectively connected to the PB5, PB6, PB7, PB8 and PB9 pins of the main control chip in the STM32 microcontroller circuit, and the other ends are all grounded.
[0043] Specifically, if Figure 6-Figure 7 The following is a schematic diagram of a binary input and output circuit, which includes the following two cases:
[0044] 1. LCD panel test:
[0045] 1) In the binary input and output circuit, 12 relays of model G6B-221P-US-DC5 are used, which are driven by 5V voltage.
[0046] 2) Testing a display panel requires driving three relays simultaneously, which integrates six signal lines, namely RX signal line, TX signal line, running light signal line, fault light signal line, core board GND line, and display panel GND line.
[0047] 3) The relay drive circuit uses transistors as switches and amplifiers:
[0048] ①The base of the transistor is connected to the MCU I / O port (PA1, PA2, PA3, PA4, PA5, PA6, PB15, PA8, PA9, PA10, PA11, PA12), and a 1K current limiting resistor is connected in series between them;
[0049] ②The collector is connected to a 5V power supply through the relay coil, and an IN4007 diode is connected in parallel with the coil to provide freewheeling;
[0050] ③The transistor emitter is directly connected to GND.
[0051] 4) There are five buttons in the circuit (KEY1 to KEY5 are connected to PB5 to PB9 respectively), which are used to control the detection selection board. One of the buttons (KEY5) is used to detect the fault warning light on the display panel.
[0052] 5) Connect one end of a key to the MCU I / O port and the other end to GND. Set the pin to pull-up input mode. When a key (KEY1 to KEY5) is pressed, the MCU pin is pulled low, indicating a low input level; otherwise, it is a high input level. The program detects whether the pin is low. When the pin is low, the I / O port connected to the relay pin is controlled to output a high level. Transistor Uc>Ub>Ue (where transistor Uc corresponds to transistor pin 3, transistor Ub corresponds to transistor pin 2, and transistor Ue corresponds to transistor pin 1). The transistor is in the amplified state, the transistor is turned on, the relay contacts are attracted, and the six signal lines are connected. Otherwise, the transistor is in the cut-off state, the transistor is cut off, the relay contacts are separated, and the lines are disconnected.
[0053] 6) After selecting the display panel to be tested, press this button to test whether the alarm is normal.
[0054] 7) J11, J12, J13, and J14 are connected to four display boards for data communication and power supply.
[0055] 2. Transfer switch test:
[0056] The transfer switch is connected to the core board microcontroller through the connector (J20). When the transfer switch is switched, the I / O port potential of HW and FW will be lowered. When the microcontroller detects the voltage change, it outputs 3V voltage through PA7 or PB14 to light up the closed or open position indicator.
[0057] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process is described in detail below.
[0058] 1. Principle of LCD panel testing: By writing a complete program to control the display panel on the core board, plugging the core board into the main board, and using the core board's RX / TX communication circuit to interact with the display board, the normally open contacts of the G6B-221P-US-DC5 relay controlled by the main board are connected in series to the communication circuit. The STM32F103C8T6 main control chip is used to control the opening and closing of the relay, thereby achieving board selection and information transmission. The other two I / O ports of the core board are then enabled to control the fault light and the operation light. When the board selection button is pressed, the corresponding "board selection indicator light" is lit. At this time, the operation buttons on the LCD panel can be operated to perform the test.
[0059] 2. Principle of transfer switch test: Write a complete program to control the display panel on the core board, plug the core board into the main board, use the core board's RX / TX communication circuit to interact with the display board, and connect the core board's I / O to control the closed and open positions with the transfer switch test interface through the main board. When the transfer switch is turned to the open position, the potential of the core board's I / O port that controls the open position will be lowered. At this time, the corresponding open position SOE will be displayed on the screen of the LCD display panel, and a 3V voltage will be output at the other I / 0 port to light up the open position indicator light. The same applies when the transfer switch is turned to the closed position.
[0060] In summary, with the aid of the above-mentioned technical solutions of the present invention, the detection tooling of the present invention has significant advantages in terms of improving production efficiency, ensuring product quality, reducing human errors, facilitating maintenance and management, and tracing and solving problems. By using the detection tooling, the display panel of the distribution automation terminal can be efficiently and conveniently detected, and the screen, buttons and indicator lights can be intuitively felt to be normal, thereby significantly improving production efficiency, which is particularly important in mass production. The detection tooling can ensure that the product meets all design specifications and manufacturing standards during the production process, and has the characteristics of consistency in detection means, and can identify faults and defects through testing, thereby ensuring the quality and reliability of the product. The detection tooling can reduce dependence on manual operation, thereby reducing test misjudgments due to human factors. When a problem is discovered through the tooling, the source of the problem can be quickly located, which facilitates the tracking and resolution of the problem and reduces product repairs and scrap rates.
[0061] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.
[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. Based on the STM32 power distribution automation terminal display module test tooling, it is characterized by: The invention comprises a housing (1), wherein both sides of the housing (1) are provided with a transport port (2), one side of the transport port (2) is provided with a power socket switch (3), and the surface of the housing (1) is composed of a transfer switch test area and a plurality of liquid crystal display panel test areas; The transfer switch test area includes a transfer switch on / off position indicator light (4) provided on one side of the bottom surface of the housing (1), and a transfer switch test interface (5) is provided on the top of the transfer switch on / off position indicator light (4); The liquid crystal display panel test area includes a liquid crystal display panel test interface (6) provided on the surface of the housing (1), a panel selection key switch (7) is provided at the bottom of the liquid crystal display panel test interface (6), and a selection indicator light (8) is provided on one side of the panel selection key switch (7); A test system is provided inside the housing (1), and the test system is composed of an STM32 single-chip microcomputer circuit, an STM32 core board circuit, a power supply circuit, and an open-input open-output circuit. The output end of the power supply circuit is respectively connected to the input end of the STM32 single-chip microcomputer circuit and the input end of the STM32 core board circuit. The output end of the STM32 single-chip microcomputer circuit and the output end of the STM32 core board circuit are both connected to the input end of the open-input open-output circuit. The output end of the open-input open-output circuit is respectively connected to the input end of the STM32 single-chip microcomputer circuit and the input end of the display panel.
2. The test fixture based on the STM32 power distribution automation terminal display module according to claim 1, characterized in that: The STM32 single-chip microcomputer circuit uses STM32F103C8T6 as the main control chip, using 25 I / O ports of the main control chip as input and output; Among them, the PA1, PA2 and PA3 pins of the main control chip are used to connect the first display panel, the PA4, PA5 and PA6 pins are used to connect the second display panel, the PB15, PA8 and PA9 pins are used to connect the third display panel, the PA10, PA11 and PA12 pins are used to connect the fourth display panel, the PB5, PB6, PB7, PB8 and PB9 pins are used for test triggering, the PB0, PB1, PB4 and PB11 pins are used for test selection indication, and the PA7, PB12, PB13 and PB14 pins are used for switching switch testing.
3. The STM32 distribution automation terminal display module test tool according to claim 1, characterized in that: The STM32 core board circuit uses STM32H723ZGT6 as the main control chip, and uses the two I / O ports 91 and 92 of the main control chip as the mainboard transfer with the detected display panel through the single-chip microcomputer. The PG6 and PG7 pins of the main control chip are used to connect to the operation indicator light of the liquid crystal display panel, and the GND and VCC pins are used for power supply.
4. The STM32 distribution automation terminal display module test fixture according to claim 1, characterized in that: The power supply circuit includes a power management chip U2, a power management chip U5, a resistor R10, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C15, a capacitor C16, an inductor L1 and a diode D9; The VIN pin of the power management chip U2 is connected to one end of the resistor R10 and one end of the capacitor C5 respectively, and the other end of the capacitor C5 is connected to the ON#OFF pin and the GND pin of the power management chip U2 respectively and grounded; The OUT pin of the power management chip U2 is respectively connected to the cathode of the diode D9 and one end of the inductor L1, the anode of the diode D9 is grounded, and the other end of the inductor L1 is respectively connected to the FB pin of the power management chip U2, one end of the capacitor C7, one end of the capacitor C6, and the VI pin of the power management chip U5; The GND pin of the power management chip U5 is respectively connected to the other end of the capacitor C6, the other end of the capacitor C7, one end of the capacitor C15 and one end of the capacitor C16 and is grounded, and the VO pin of the power management chip U5 is respectively connected to the other end of the capacitor C15 and the other end of the capacitor C16.
5. The STM32 distribution automation terminal display module test fixture according to claim 4 is characterized in that: The model of the power management chip U2 is LM2576SX-5.0, and the model of the power management chip U5 is AMS1117-3.
3.
6. The STM32 distribution automation terminal display module test fixture according to claim 4, characterized in that: The diode D9 is an SS54 Schottky diode, and the capacitors C5, C7, and C15 are all electrolytic capacitors.
7. The STM32 distribution automation terminal display module test tool according to claim 1, characterized in that: The binary input and output circuit is composed of 12 groups of relay drive circuits and 5 groups of buttons; The relay drive circuit uses a transistor as a switch and amplifier tube, wherein the base of the transistor is connected to the I / O port of the single-chip microcomputer, and a current-limiting resistor is connected in series between the base of the transistor and the I / O port of the single-chip microcomputer. The collector of the transistor is connected to a 5V power supply through a relay coil, and a diode is connected in parallel with the coil to provide freewheeling. The emitter of the transistor is directly grounded; One end of the five groups of buttons are respectively connected to the PB5, PB6, PB7, PB8 and PB9 pins of the main control chip in the STM32 single-chip microcomputer circuit, and the other ends are all grounded.