Portable intelligent diagnostic apparatus

Abstract

The utility model belongs to the technical field of railway equipment, and particularly relates to a portable intelligent diagnostic instrument which comprises a shell, a mainboard, an interface board and a power supply battery are arranged in the shell, and a touch screen is arranged on the front face of the shell. The mainboard comprises a power supply unit, a core board unit, a network unit, a 4G unit, a positioning unit and an interface unit; the interface board comprises a power supply unit, a communication unit, an acquisition unit and an interface unit and is used for connecting external tested equipment; the power supply battery supplies power to the mainboard, the interface board and the touch screen; and the touch screen is connected with the main board and is used for displaying diagnosis information and receiving user input. According to the portable intelligent diagnostic instrument, multiple functions, high reliability and strong compatibility of the portable intelligent diagnostic instrument are realized, and the maintenance efficiency and the diagnosis precision of field equipment are remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of railway equipment technology, specifically relating to a portable intelligent diagnostic instrument. Background Technology

[0002] In recent years, with the improvement of the intelligence level of rail transit equipment, intelligent diagnostic instruments have played an important role in the maintenance of EMU trains, locomotives, and railcars. Existing diagnostic equipment is mainly based on the traditional DMS (Dynamic Monitoring System for Train Control Equipment) platform, whose hardware architecture was finalized early and has the following technical shortcomings:

[0003] (1) Insufficient interface compatibility

[0004] Existing diagnostic equipment typically only supports specific models of host machines or boards (such as DMS / EOAS) and cannot be adapted to new hardware platforms (such as LSP, GDK and other derivative systems), resulting in the need to carry multiple specialized devices during on-site maintenance, which is inefficient.

[0005] (2) Single communication function

[0006] Traditional equipment relies heavily on wired Ethernet or local serial communication, lacking 4G / 5G remote data transmission capabilities. Fault data cannot be uploaded to the server in real time, delaying maintenance decisions.

[0007] (3) Weak positioning and detection functions

[0008] Existing positioning units typically only support GPS and lack antenna status detection capabilities, making it impossible to determine whether a positioning anomaly in the device under test (such as a vehicle-mounted GNSS terminal) is caused by antenna damage.

[0009] (4) Inefficient power management

[0010] Early designs used linear voltage regulator circuits, which were inefficient, generated a lot of heat, and lacked real-time output voltage monitoring, potentially causing system crashes due to short circuits in external devices.

[0011] (5) Poor scalability

[0012] The motherboard and interface board are fixedly connected, which makes it impossible to flexibly replace the interface modules (such as CAN / RS485 configuration) and makes it difficult to adapt to the testing needs of different vehicle models.

[0013] Therefore, there is an urgent need for a new generation of integrated and intelligent portable diagnostic solutions. Summary of the Invention

[0014] This invention aims to address the significant shortcomings of existing diagnostic equipment in terms of multi-device compatibility, remote maintenance, positioning accuracy, power reliability, and modular expansion. It proposes a portable intelligent diagnostic instrument that, through a highly integrated modular design, achieves multifunctionality, high reliability, and strong compatibility, significantly improving the efficiency of on-site equipment maintenance and diagnostic accuracy.

[0015] To achieve the above objectives, the technical solution adopted is:

[0016] This utility model provides a portable intelligent diagnostic instrument, including a housing. Inside the housing are a motherboard, an interface board, and a power supply battery. A touchscreen is located on the front of the housing. The motherboard includes a power supply unit, a core board unit, a network unit, a 4G unit, a positioning unit, and an interface unit. The interface board includes a power supply unit, a communication unit, a data acquisition unit, and an interface unit, used to connect to an external device under test. The power supply battery provides power to the motherboard, interface board, and touchscreen. The touchscreen is connected to the motherboard and is used to display diagnostic information and receive user input.

[0017] According to the portable intelligent diagnostic instrument of this utility model, the power supply unit of the motherboard further includes a battery charging management chip, a power-on / off circuit, a DC-DC step-down circuit, and an indicator light circuit. It supports dual-mode power supply for Type-C interface and lithium battery, with an input voltage range of 9~15VDC. The battery charging management chip converts the 15V input voltage to a 13.2V charging voltage. The power-on / off circuit realizes the power-on and screen-off functions. The DC-DC step-down circuit reduces 13.2V to 5V, 3.8V, and 3.3V. The indicator light circuit includes a charging status indicator and a power operation status indicator.

[0018] According to the portable intelligent diagnostic instrument of this utility model, the core board unit of the motherboard further includes:

[0019] The main control module is equipped with a debugging interface, a programming interface, a reset circuit, and a BOOT configuration circuit.

[0020] The communication interface module provides 15 UART serial ports and 2 gigabit Ethernet interfaces;

[0021] The data acquisition module provides 22 ADC acquisition ports;

[0022] The display communication module includes an LCD display interface, a Bluetooth interface, and a WiFi interface;

[0023] USB to serial circuit, used to read device logs via Type-C interface.

[0024] According to the portable intelligent diagnostic instrument of this utility model, the network unit of the motherboard further includes:

[0025] Two PHY chips, whose input ends are connected to the MAC layer of the core board, and whose output ends are connected to the touch screen and the switching chip respectively;

[0026] The switching chip expands the single gigabit Ethernet port of the core board unit into four Ethernet ports for connecting the device under test and the internal server.

[0027] Multiple network interfaces, including two RJ45 interfaces with transformers, two 6P white socket interfaces, and one double-row staggered socket interface.

[0028] According to the portable intelligent diagnostic instrument of this utility model, the 4G unit of the motherboard further includes:

[0029] The motherboard has a reserved NSB0-S6701-TS50 socket for installing a 4G module;

[0030] The motherboard is equipped with a SIM card slot for installing SIM cards.

[0031] According to the portable intelligent diagnostic instrument of this utility model, the positioning unit of the motherboard further includes:

[0032] The motherboard has a reserved female connector for the positioning module, which is compatible with M8N modules and high-precision positioning modules;

[0033] Antenna detection circuit is used to determine the continuity, short circuit, and open circuit status of an antenna.

[0034] According to the portable intelligent diagnostic instrument of this utility model, the communication unit of the interface board further includes:

[0035] The TAX and SCU communication interfaces use a dual-layer DB9 female port.

[0036] The CAN communication interface uses a single-layer DB9 female port.

[0037] According to the portable intelligent diagnostic instrument of this utility model, the power supply unit of the interface board further includes:

[0038] The isolated step-down module converts the 13.2V input of the motherboard to a 12V output for use by the SCU board;

[0039] The LDO chip generates an isolated 5V to power the acquisition circuit.

[0040] According to the portable intelligent diagnostic instrument of this utility model, the acquisition unit of the interface board further includes:

[0041] An isolated sampling circuit monitors the 12V voltage output from the isolated buck module of the power supply unit.

[0042] The high-voltage divider circuit is used to divide the high voltage of the input TD / KC vehicle control signal to a measurable range of 0-3.3V.

[0043] An optocoupler isolation detection circuit is connected to the output terminal of the high-voltage divider circuit. It controls the optocoupler switch through a reference voltage regulator to achieve pulse category identification.

[0044] The voltage detection circuit connects the voltage-divided signal to the ADC pin of the core board for digital processing.

[0045] According to the portable intelligent diagnostic instrument of this utility model, the interface unit of the interface board further includes one TD / KC vehicle control signal test interface and three DB9 interfaces. The three DB9 interfaces include one with 12V output, one RS485 interface, one RS232 interface and one CAN communication interface. The 12V power supply and RS485 share one DB9 interface.

[0046] The beneficial effects achieved by adopting the above technical solution are:

[0047] (1) Improve equipment compatibility

[0048] This utility model, through its modular interface board design (such as configurable RS485 / CAN interface), is compatible with 7 types of host devices and 23 types of boards, including DMS, EOAS, LSP, and GDK, reducing the number of devices required for on-site maintenance and improving testing efficiency.

[0049] (2) Enhance remote maintenance capabilities

[0050] This utility model integrates a 4G module, which supports real-time uploading of fault data to a cloud server, avoiding the geographical limitations of traditional wired communication and shortening fault response time.

[0051] (3) Precise positioning

[0052] This invention uses dual-mode positioning (GPS / BDS) + antenna detection to not only verify the positioning accuracy of the vehicle positioning device, but also detect the antenna status (open circuit / short circuit), clearly distinguishing whether the positioning failure originates from the device or the antenna, thus improving the accuracy of troubleshooting.

[0053] (4) Optimize power supply reliability and efficiency

[0054] This invention uses an isolated step-down module (such as VRB1205S-6WR3) and an LDO chip, achieving a conversion efficiency of ≥90%, thus solving the problem of high heat generation in traditional linear voltage regulator circuits. Attached Figure Description

[0055] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. The drawings are merely illustrative of some embodiments of this utility model and are not intended to limit the scope of all embodiments of this utility model.

[0056] Figure 1 This is a schematic block diagram of the portable intelligent diagnostic instrument according to an embodiment of the present utility model;

[0057] Figure 2 This is a schematic block diagram of the motherboard power supply unit according to an embodiment of the present utility model;

[0058] Figure 3 This is a schematic block diagram of the interface board acquisition unit according to an embodiment of this utility model;

[0059] Figure 4 This is a schematic diagram of the overall structure of the portable intelligent diagnostic instrument according to an embodiment of the present invention. Detailed Implementation

[0060] The following description, in conjunction with the accompanying drawings of specific embodiments of the present invention, will provide a clear and complete illustration of exemplary solutions. Unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art.

[0061] like Figure 1 and Figure 4 As shown, this embodiment discloses a portable intelligent diagnostic instrument comprising a casing, within which a motherboard, an interface board, and a power supply battery are housed. A touchscreen is located on the front of the casing. The motherboard includes a power supply unit, a core board unit, a network unit, a 4G unit, a positioning unit, and an interface unit. The interface board is configured with interfaces commonly used in locomotive products for testing, such as TAX, SCU, TD, and KC. The interface board includes a power supply unit, a communication unit, a data acquisition unit, and an interface unit, used for connecting external devices under test. The power supply battery provides power to the motherboard, interface board, and touchscreen. The touchscreen is connected to the motherboard and is used to display diagnostic information and receive user input.

[0062] This portable intelligent diagnostic instrument is used to perform intelligent diagnostics on the dynamic monitoring system for train control and related products, including the Dynamic Monitoring System for Train Control Equipment (DMS), the Train Driver Operation Information Analysis System (EOAS), the Main Locomotive Shunting Operation Safety Auxiliary Protection System (LSP), the Railcar Shunting Operation Safety Auxiliary Protection System (GDK), and seven main units and 23 circuit boards of the new hardware platform.

[0063] The motherboard hardware circuit design is as follows:

[0064] ① Power supply unit

[0065] The power supply unit includes a battery charging management chip, a power on / off circuit, a DC-DC step-down circuit, and an indicator light circuit, supporting dual-mode power supply via Type-C interface and lithium battery.

[0066] The motherboard can be powered by a battery or directly via a Type-C interface for PD power supply. The board internally steps down the input power for use by subsequent stages. The permissible input voltage range is 9~15VDC.

[0067] The motherboard uses a Type-C female port (side-plug Type-C female connector) as the power input interface. The input voltage is configured to a fixed 15V by a voltage chip and resistors. Then, the input voltage is converted to 13.2V by the battery charging management chip to charge the lithium battery. It also supports a battery power indicator pin, which is brought out to the panel for intuitive display using LEDs.

[0068] The stepped-down 13.2V first enters the power-on / off circuit, which is built using PMOS, NMOS, diodes, reset chip and other components. The logic is that when the power button is pressed and held for 3.5 seconds, the whole machine is turned on / off, and when the power button is pressed for 1 second, the screen is turned off / on.

[0069] After passing through the power-on / off circuit, the 13.2V is divided into multiple paths and enters the subsequent stage, such as... Figure 2 As shown.

[0070] (1) It is converted to 5V by SY8104IADC, one of which is used as the main power supply for the core board unit, and the other is used as the power supply for the touch screen.

[0071] (2) The voltage is converted to 3.8V via SY8104IADC, which is used to power the 4G module and its peripheral circuits.

[0072] (3) The voltage is converted to 3.3V by the SY8113B1ADC to power the motherboard and interface board.

[0073] (4) The voltage is converted to 5V isolation via the VRB1205S-6WR3 isolation module and then to 3.3V isolation via the LDO chip to power the positioning module.

[0074] (5) Supply 13.2V directly to the interface board.

[0075] The indicator light circuit includes a charging status indicator and a power supply status indicator.

[0076] ② Core board unit

[0077] The main control module is equipped with a debugging interface, a programming interface, a reset circuit, a BOOT configuration circuit, and a power decoupling circuit. The BOOT configuration circuit includes Boot configuration, USB_ID configuration, and watchdog enable configuration. The power decoupling circuit: the 5V power output from the power supply unit directly supplies the core board unit, and capacitors, ferrite beads, and other components are added near the input pins for decoupling.

[0078] The communication interface module provides 15 UART serial ports and 2 gigabit Ethernet interfaces, of which 3 UART serial ports are two RS485 communication serial ports and one CAN communication serial port.

[0079] The data acquisition module provides 22 ADC acquisition ports.

[0080] The display communication module includes an LCD display interface, a Bluetooth interface, and a WiFi interface.

[0081] The USB-to-serial circuit is used to read device logs through the Type-C charging interface. The USB-to-serial circuit converts the UART serial port data inside the device into USB signals.

[0082] The status monitoring module features temperature detection and operational status indication. A temperature detection chip is configured to collect the core temperature of the motherboard. A system operation status indicator light is located on the outer panel, illuminating when the core board is fully operational.

[0083] ③ Network Unit

[0084] The network unit is responsible for communication with external devices under test (DUTs) and internal server equipment. Two PHY chips (YT8512H) connect to the core board's MAC layer via the MII interface, converting digital signals into differential analog signals. One of these chips, after a transformer, connects to a switching chip, expanding the single gigabit Ethernet port into four 100Mbps Ethernet ports. Two of these ports connect to the RJ45 connector with its built-in network transformer, used as standard Ethernet ports for connecting internal server equipment. The other two ports, after another transformer, connect to a small power strip, allowing for different interface configurations depending on testing needs. The second port is AC-coupled to the touchscreen network interface. Since the touchscreen interface is an RJ45 with its own network transformer, and space constraints necessitate removing this interface, the network connection between the motherboard and the screen is changed to a pin header and female connector method, with AC coupling also used for network communication.

[0085] The portable smart diagnostic instrument has five network ports, including two RJ45 interfaces with transformers, two 6P white socket interfaces, and one double-row staggered socket interface.

[0086] In this embodiment, the touch screen uses DWIN's Android smart touch screen, which has an independent core, a Wi-Fi module and rich interface resources. It has a user interface connected to the motherboard, including two UART serial ports, power and ground; and a network port (the original built-in RJ45 has been replaced with a pin connector), which intuitively displays test data, battery level and other information.

[0087] ④ 4G unit

[0088] To meet the testing requirements of 4G plug-in boards and devices, a 4G unit is configured. The motherboard has a reserved NSB0-S6701-TS50 socket for installing 4G modules. At the same time, the motherboard is equipped with a SIM card slot for installing SIM cards and also has a reserved eSIM chip.

[0089] ⑤ Positioning unit

[0090] A positioning unit is configured to meet the testing needs of positioning plug-in boards and devices. The portable intelligent diagnostic instrument has the function of detecting the positioning of the device under test, and can also detect the status of the positioning antenna of the device under test.

[0091] The motherboard has a reserved female connector for the positioning module, which can be used to adapt to the M8N module and the high-precision positioning module. It also has an antenna detection circuit, which can determine the continuity, short circuit and open circuit status of the antenna by high and low level.

[0092] The antenna detection circuit includes: a DC bias path that provides operating voltage to the antenna through an inductor; a current sampling module that converts the antenna current into a measurable voltage signal; and a comparator circuit that determines the antenna connection status based on a current threshold.

[0093] ⑥ Interface Unit

[0094] Type-C female port: Uses U264-141N-4BAC10, which has power supply and serial communication functions.

[0095] USB-A female port: Uses USB-226-BRY, which supports the USB 2.0 protocol and is used in HOST mode.

[0096] Core board debugging interface: using Xifei 2.0mm pitch 302-2SMS-10PS.

[0097] Button interface: In order to ensure the versatility of handheld devices, in addition to the touch screen, corresponding function buttons are reserved to prevent touch failure.

[0098] Core board programming interface, core board BOOT configuration interface, network interface, SIM card interface, positioning interface, touch screen user interface, interface board interface, DDU network interface and battery interface.

[0099] The hardware circuit design of the interface board is as follows:

[0100] ① Power supply unit

[0101] The interface board draws power from the motherboard, including 13.2V output from the power-on / off circuit and 3.3V output from the DC-DC step-down circuit.

[0102] The power supply unit includes an isolated step-down module and an LDO chip. The board processes the 13.2V input, using the isolated step-down module to convert the 13.2V input from the motherboard to a 12V output for use by the SCU board; simultaneously, the LDO chip generates an isolated 5V to power the acquisition circuit.

[0103] ② Communication unit

[0104] The communication unit in this embodiment includes two RS485 channels, one for TAX communication and one for SCU communication; and one CAN communication channel. All of the above chips are communication modules with built-in isolated power supplies to meet the mutual isolation requirements between ports. At the same time, ESD, gas discharge tube, varistor and other protections are provided at the external interface.

[0105] The TAX and SCU communication interfaces use a double-layer DB9 female port. The CAN communication interface uses a single-layer DB9 female port.

[0106] ③ Acquisition Unit

[0107] like Figure 3 As shown, the acquisition unit includes an isolation sampling circuit, a high-voltage divider circuit, an optocoupler isolation detection circuit, and a voltage detection circuit.

[0108] An isolated sampling circuit monitors the 12V voltage output from the isolated buck module of the power supply unit.

[0109] The high-voltage divider circuit is used to divide the high voltage of the input TD / KC vehicle control signal to a measurable range of 0-3.3V.

[0110] The optocoupler isolation detection circuit is connected to the output of the high-voltage divider circuit. It controls the optocoupler switch through the reference voltage regulator to achieve pulse category identification.

[0111] The voltage detection circuit connects the voltage-divided signal to the ADC pin of the core board for digital processing.

[0112] The purpose of setting up the acquisition unit to collect the isolated 12V output from the power supply unit is to monitor the power supply stability in real time and perform overcurrent protection.

[0113] ④ Interface Unit

[0114] The interface unit includes one TD / KC vehicle control signal test interface and three DB9 interfaces. The three DB9 interfaces include one with 12V output, one RS485 interface, one RS232 interface and one CAN communication interface. The 12V power supply and RS485 share one DB9 interface.

[0115] The workflow is as follows:

[0116] After the power supply unit supplies power to each module, the core board unit starts a self-test; the interface board connects to the device under test, and the isolated 12V power supply supplies power to the device under test; it collects TD / KC vehicle control signals and performs voltage division processing, and can also inject simulated operating condition signals into the device under test; the core board unit compares the collected data with the standard values ​​to generate a diagnostic report, and the data is uploaded to the server through the 4G module / network port; the touch screen displays the diagnostic results in real time.

[0117] The preferred embodiments for implementing this utility model have been described in detail above. However, it should be understood that these embodiments are merely illustrative and not intended to limit the scope, application, or construction of this utility model in any way. The scope of protection of this utility model is defined by the appended claims and their equivalents. Those skilled in the art can make numerous modifications to the foregoing embodiments under the teachings of this utility model, and all such modifications fall within the scope of protection of this utility model.

Claims

1. A portable intelligent diagnostic apparatus, characterized by comprising: The application relates to a device for diagnosing and testing external equipment, which comprises a shell, a mainboard, an interface board and a power supply battery, wherein the front surface of the shell is provided with a touch screen; the mainboard comprises a power supply unit, a core board unit, a network unit, a 4G unit and an interface unit; the interface board comprises a power supply unit, a communication unit, an acquisition unit and an interface unit, and is used for connecting external equipment to be tested; the power supply battery provides power supply for the mainboard, the interface board and the touch screen; the touch screen is connected with the mainboard and is used for displaying diagnosis information and receiving user input.

2. The portable intelligent diagnostic apparatus according to claim 1, wherein The power supply unit of the mainboard comprises a battery charging management chip, a switch-on / off circuit, a DCDC voltage reduction circuit and an indicator light circuit, supports Type-C interface and lithium battery dual-mode power supply, and has an input voltage range of 9-15VDC; the battery charging management chip converts the 15V input voltage into a 13.2V charging voltage; the switch-on / off circuit realizes the functions of switch-on and screen-off; the DCDC voltage reduction circuit reduces the 13.2V voltage into 5V, 3.8V and 3.3V; and the indicator light circuit comprises a charging state indicator light and a power supply working state indicator light.

3. The portable intelligent diagnostic apparatus according to claim 1, wherein The core board unit of the mainboard comprises: a main control module which is configured with a debugging interface, a burning interface, a reset circuit and a BOOT configuration circuit; a communication interface module which provides 15-way UART serial ports and 2-way gigabit Ethernet interfaces; a data acquisition module which provides 22-way ADC acquisition ports; a display communication module which comprises an LCD display interface, a Bluetooth interface and a WiFi interface; a USB-to-serial port circuit which is used for reading device logs through a Type-C interface.

4. The portable intelligent diagnostic apparatus according to claim 1, wherein The network unit of the mainboard comprises: two-way PHY chips, the input ends of which are connected with the core board MAC layer, and the output ends of which are connected with the touch screen and a switching chip respectively; a switching chip which expands the single-way gigabit network port of the core board unit into four-way network ports, and is used for connecting the equipment to be tested and an internal server; multi-type network interfaces which comprise two-way RJ45 interfaces with transformers, two-way 6P small white socket interfaces and a double-row staggered socket interface.

5. The portable intelligent diagnostic apparatus according to claim 1, wherein The 4G unit of the mainboard comprises: a mainboard reserved NASB0-S6701-TS50 seat which is used for mounting a 4G module; a mainboard configured SIM card seat which is used for mounting a SIM card.

6. The portable intelligent diagnostic apparatus according to claim 1, wherein The positioning unit of the mainboard comprises: a mainboard reserved positioning module female seat which is adapted to M8N modules and high-precision positioning modules; an antenna detection circuit which is used for judging the pass, short circuit and open circuit states of the antenna.

7. The portable intelligent diagnostic apparatus of claim 1, wherein The communication unit of the interface board comprises: TAX communication interfaces and SCU communication interfaces which adopt double-layer DB9 female ports; CAN communication interfaces which adopt single-layer DB9 female ports.

8. The portable intelligent diagnostic apparatus according to claim 2, wherein The power supply unit of the interface board comprises: an isolation voltage reduction module which converts the 13.2V input of the mainboard into 12V output, and is used for the SCU interface board; an LDO chip which generates isolated 5V for the acquisition circuit.

9. The portable intelligent diagnostic apparatus according to claim 8, wherein, The acquisition unit of the interface board comprises: an isolation sampling circuit which monitors the 12V voltage output by the isolation voltage reduction module of the power supply unit; a high-voltage voltage division circuit which is used for dividing the input TD / KC vehicle control signal high voltage into a measurable range of 0-3.3V; The light coupling isolation detection circuit is connected with the output end of the high-voltage voltage dividing circuit, controls the light coupling switch through a reference voltage stabilizing tube, and realizes pulse type identification. The voltage detection circuit inputs the divided voltage signal into the core board ADC pin for digital processing.

10. The portable intelligent diagnostic apparatus of claim 1, wherein, The interface unit of the interface board comprises one TD / KC control vehicle signal test interface and three DB9 interfaces, the three DB9 interfaces comprise one 12V output, one RS485 interface, one RS232 interface and one CAN communication interface, and the 12V power supply and the RS485 share one DB9 interface.

Images