Standard motor train unit DI digital input signal fault detection device

Abstract

The application is suitable for the field of railway transportation technology, and provides a standard motor train unit DI digital quantity input signal fault detection device.The device comprises: an input connection module connected with a DI digital quantity input board card of a standard motor train unit providing DI digital quantity input signals; a signal display module connected with the input connection module, used for lighting to prompt when the DI digital quantity input board card has a fault; and a voltage detection module connected with the input connection module, used for detecting voltage polarity and voltage value of the input signals.The input connection module is connected with the DI digital quantity input board card, when the DI digital quantity input board card has a fault, the signal display module lights to prompt, for further detecting a fault position, the voltage detection module is used for detecting voltage polarity and voltage value of the input signals, so that the line fault is more conveniently and accurately judged, and the fault detection efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of railway transportation technology, and in particular relates to a fault detection device for DI digital input signal of a standard EMU. Background Technology

[0002] Each standard EMU (Electric Multiple Unit) is equipped with multiple RIOM (Radio Interconnection and Originator) digital input (DI) boards to collect digital input signals during EMU operation. When an I / O module board or DI input line malfunctions, the first step is to connect a computer to read the signal status of the corresponding DI board's internal input variables. If the signal disappears or the digital signal input status is incorrect, a multimeter is used to test the voltage of the corresponding connector pins on the DI board. Because the pins of the DI board's input connector are small and densely packed, ... Figure 1 As shown, measurements require wrapping a wire around the multimeter probe or using a thin probe. If the two probes are too close together, a short circuit can easily occur. To prevent short circuits during measurement, one person needs to hold the multimeter probes with both hands to measure the voltage polarity and value, while another person holds the plug to be measured. This makes voltage measurement very difficult and time-consuming. Furthermore, to accurately determine if the input circuit wiring and voltage value are correct, multiple measurements of voltage polarity and value are required, making the measurement method cumbersome. Summary of the Invention

[0003] In view of this, the present invention provides a fault detection device for the DI digital input signal of a standard EMU, which aims to solve the problems of difficult and cumbersome detection and long measurement time in the prior art.

[0004] The first aspect of this invention provides a fault detection device for the DI digital input signal of a standard high-speed train, comprising:

[0005] An input connection module that connects to the DI digital input board that provides DI digital input signals on a standard EMU;

[0006] Connected to the input connection module, this is a signal display module used to illuminate an indicator light when the DI digital input board malfunctions.

[0007] A voltage detection module connected to the input connection module for detecting the voltage polarity and voltage value of the input signal.

[0008] Optional, also includes:

[0009] A power module connected with the input connection module, the signal display module and the voltage detection module, and providing power for the input connection module, the signal display module and the voltage detection module;

[0010] A test light module connected with the power module and the signal display module respectively, and used for detecting whether the standard EMU DI digital input signal fault detection device exists fault before input signal fault detection.

[0011] Optionally, the standard EMU DI digital input signal fault detection device further comprises:

[0012] A relay module connected between the test light module and the voltage detection module, and used for interlocking, and the relay module is further connected with the power module.

[0013] Optionally, the standard EMU DI digital input signal fault detection device further comprises:

[0014] A circuit protection module connected with the input connection module and the power module, and used for protecting the standard EMU DI digital input signal fault detection device.

[0015] Optionally, the standard EMU DI digital input signal fault detection device further comprises a housing upper cover and a housing lower cover.

[0016] The housing upper cover and the housing lower cover are buckled to form a cavity accommodating all modules of the standard EMU DI digital input signal fault detection device.

[0017] Optionally, the input connection module is an input connector comprising a plurality of pins, and the pins are male pins.

[0018] A first hole for mounting the input connection module is formed on one side end surface of the housing lower cover.

[0019] Optionally, the input connector comprises a plurality of digital input channels and a plurality of negative channels.

[0020] Optionally, the standard EMU DI digital input signal fault detection device further comprises a power button, a power indicator and a test light button.

[0021] The power button is connected with the power module, and is arranged in a second hole arranged on the housing upper cover.

[0022] The power indicator is connected with the power module, and is arranged in a third hole arranged on the housing upper cover, and the power indicator is arranged around the power button.

[0023] The test light button is connected with the test light module, and is arranged in a fourth hole arranged on the housing upper cover.

[0024] Optionally, the standard EMU DI digital input signal fault detection device further comprises:

[0025] A plurality of indicator lights connected with the signal display module, the plurality of indicator lights are respectively arranged in a plurality of fifth holes arranged on the upper cover of the shell;

[0026] A plurality of voltage test terminals connected with the voltage detection module, the plurality of voltage test terminals are respectively arranged in a plurality of sixth holes arranged on the upper cover of the shell; the plurality of voltage test terminals include a plurality of negative voltage test terminals and a plurality of positive voltage test terminals;

[0027] Wherein, the indicator light, the positive voltage test terminal and the digital quantity input channel are correspondingly arranged.

[0028] Optionally, the device further comprises a fixing device.

[0029] The fixing device is arranged on the side where the input connector is located, and is respectively arranged at the corresponding positions of the upper cover of the shell and the lower cover of the shell.

[0030] Compared with the prior art, the embodiment of the present application has the beneficial effects that: in the embodiment of the present application, the input connection module is connected with the DI digital quantity input board card providing the DI digital quantity input signal on the motor train unit, when the DI digital quantity input board card has a fault, the signal display module connected with the input connection module is lighted, in order to further detect the fault position, the voltage polarity and the voltage value of the input signal are detected by the voltage detection module connected with the input connection module, so that the line fault is more accurately judged, the fault detection efficiency is improved, and the problems of difficult, complicated and long time-consuming fault detection of the DI digital quantity input board card in the prior art are solved, and the present application can further detect the fault of the peripheral line, so that the staff can determine the fault position for maintenance more quickly. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 is a schematic diagram of the DI digital quantity input signal fault detection mode of the prior art;

[0033] Figure 2 is a structural schematic diagram of the standard motor train unit DI digital quantity input signal fault detection device provided by the embodiment of the present application;

[0034] Figure 3 is a structural schematic diagram of the standard motor train unit DI digital quantity input signal fault detection device provided by another embodiment of the present application;

[0035] Figure 4(1) is a schematic diagram of the outer shell structure of the standard EMU DI digital input signal fault detection device provided in the embodiment of the present invention;

[0036] Figure 4(2) is a front view of the housing of the standard EMU DI digital input signal fault detection device provided in the embodiment of the present invention;

[0037] Figure 5(1) is a partial circuit structure diagram of the standard EMU DI digital input signal fault detection device provided in the embodiment of the present invention;

[0038] Figure 5(2) is a partial circuit structure diagram of the standard EMU DI digital input signal fault detection device provided in the embodiment of the present invention. Detailed Implementation

[0039] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0040] To illustrate the technical solution described in this invention, specific embodiments are described below.

[0041] Example 1

[0042] This invention provides a fault detection device for the DI digital input signal of a standard high-speed train, such as... Figure 2 As shown, the standard EMU DI digital input signal fault detection device may include:

[0043] An input connection module 1 is connected to a DI digital input board that provides DI digital input signals on a standard EMU; wherein, the DI digital input board is an input board on the EMU, and the standard EMU DI digital input signal fault detection device is a device for detecting whether there is a fault on the DI digital input board.

[0044] The signal display module 2 is connected to the input connection module 1 and is used to light up an indicator light when the DI digital input board is faulty.

[0045] A voltage detection module 3 connected with the input connection module 1 is used to detect the voltage polarity and voltage value of the input signal. The voltage detection module 3 can further detect the fault of the peripheral circuit connected with the DI digital input board card when the DI digital input board card is normal. For example, when the voltage value detected by the voltage detection module 3 is 0V, it can be accurately determined that the peripheral circuit has a fault.

[0046] The standard EMU DI digital input signal fault detection device is connected with the DI digital input board card providing the DI digital input signal on the EMU through the input connection module. When the DI digital input board card has a fault, the signal display module connected with the input connection module is lighted. In order to further detect the fault position, the voltage polarity and voltage value of the input signal are detected by the voltage detection module connected with the input connection module, so that the line fault can be more accurately determined, the fault detection efficiency is improved, and the problems of difficult, complicated and long time-consuming fault detection of the DI digital input board card in the prior art are solved. Furthermore, the fault of the peripheral circuit can be further detected, so that the staff can quickly determine the fault position for maintenance.

[0047] Optionally, as shown in Figure 3 The standard EMU DI digital input signal fault detection device can further include:

[0048] A power module 4 connected with the input connection module 1, the signal display module 2 and the voltage detection module 3 is used to provide electric energy for the input connection module 1, the signal display module 2 and the voltage detection module 3.

[0049] A test light module 5 connected with the power module 4 and the signal display module 2 is used to detect whether the standard EMU DI digital input signal fault detection device has a fault before the input signal fault detection.

[0050] The test lamp module 5 is a device for detecting whether the standard EMU DI digital quantity input signal fault detection device is normal before input signal fault detection. Optionally, the signal display module 2 on the standard EMU DI digital quantity input signal fault detection device can include a plurality of LED indicator lights. When the power module 4 supplies power, the test lamp module 5 is powered on. If all the LED indicator lights are lit, it means that the standard EMU DI digital quantity input signal fault detection device is normal and there is no fault, and the subsequent input signal fault detection can be performed. If the LED indicator lights are not all lit, it means that the standard EMU DI digital quantity input signal fault detection device itself has a fault, and after maintenance and re-detection by the test lamp module 5, the standard EMU DI digital quantity input signal fault detection device fault is removed before the subsequent input signal fault detection is performed, so as to avoid the input signal display being abnormal due to the device itself fault, resulting in an incorrect detection result.

[0051] Optionally, the test lamp module 5 and the voltage detection module 3 are connected to the relay module 6 for interlocking, and the relay module 6 is further connected to the power module 4.

[0052] When the test lamp module 5 is used, the voltage detection module 3 is disabled, and when the voltage detection module 3 is used, the test lamp module 5 is disabled. The relay module 6 can prevent the test result from being affected by the fact that all the LED indicator lights are lit by pressing the test lamp button by mistake when the standard EMU DI digital quantity input signal fault processing is performed.

[0053] Optionally, as shown in Figure 3 The standard EMU DI digital quantity input signal fault detection device further includes a circuit protection module 7 connected to the input connection module 1 and the power module 4 for protecting the standard EMU DI digital quantity input signal fault detection device.

[0054] The circuit of the circuit protection module 7 includes a corresponding voltage and current limiting protection circuit, which can prevent the internal detection circuit of the standard EMU DI digital quantity input signal fault detection device provided by the present application from being damaged when overvoltage and overcurrent occur due to peripheral circuit faults of the standard EMU DI digital quantity input signal board card.

[0055] The standard EMU DI digital quantity input signal fault detection device can be a separate portable device, and therefore a housing can be provided for placing all the modules of the standard EMU DI digital quantity input signal fault detection device. Optionally, as shown in FIG. 4(1), the housing can include a housing upper cover 81 and a housing lower cover 82.

[0056] The housing upper cover 81 and the housing lower cover 82 are buckled to form a cavity for accommodating all the modules of the standard EMU DI digital quantity input signal fault detection device.

[0057] Optionally, the material of the upper shell cover 81 and the lower shell cover 82 can be ABS plastic, so that the shell is light in weight, easy to disassemble and assemble, and convenient and fast to open and close, has good sealing property, and has waterproof effect, which can protect the internal circuit from being polluted by water and dust, and improve the stability of the standard EMU DI digital quantity input signal fault detection device.

[0058] Optionally, the lower shell cover 82 is internally provided with a foot nut for fixing a corresponding board card of the standard EMU DI digital quantity input signal fault detection device at four corners, and the nut can be made of stainless steel. Meanwhile, the upper shell cover 81 is provided with corresponding fixing bolts at four corners, and the bolts can be made of metal, and can be internally hexagonal countersunk head bolts, and four bolts can be provided.

[0059] Optionally, as shown in FIG. 4(1), the input connection module 1 is an input connector 83 including a plurality of pins, and the pin type of the pins is a male pin, and the input connector 83 has 48 pins; the pin type of the DI digital quantity input board card plug is a female pin, so that the input connector 83 can be connected with the DI digital quantity input board card, to ensure reliable and firm connection with the DI digital quantity input board card plug, and at the same time, the DI digital quantity input signal is introduced into the DI digital quantity input signal fault detection device for signal detection.

[0060] As shown in FIG. 4(1), the lower shell cover 82 is provided with a first hole on one side end face for mounting the input connection module 1, and the input connector 83 is arranged to pass out of the first hole, to facilitate connection with the DI digital quantity input board card.

[0061] Optionally, the input connector 83 includes a plurality of digital quantity input channels and a plurality of negative channels. As shown in FIG. 4(1), the input connector 83 is provided with 16 digital quantity input channels and 4 negative channels.

[0062] Optionally, as shown in FIG. 4(1), the upper shell cover 81 is further provided with a power button 84, a power indicator 85 and a test lamp button 86.

[0063] The power button 84, i.e. the power switch, is connected with the power module 4 and arranged in a second hole provided on the upper shell cover 81, i.e. the power module 4 in the shell is arranged on the upper shell cover 81 through the power button 84, to facilitate power supply to the corresponding equipment through the power button 84.

[0064] Optionally, the power button 84 can be a self-locking button.

[0065] The power indicator 85 is connected with the power module 4, and is arranged in the third hole arranged on the upper cover 81 of the shell. The power indicator 85 is arranged around the power button 84. When the power is turned on, the power indicator 85 is lighted, and when the power is turned off, the power indicator 85 is extinguished.

[0066] The test light button 86 is connected with the test light module 5, and is arranged in the fourth hole arranged on the upper cover 81 of the shell. The test light button 86 is a self-resetting button.

[0067] Optionally, the power button 84 and the test light button 86 can be arranged at any position of the upper cover 81 of the shell, as shown in FIG. 4(1). In order to facilitate the operation of the buttons, the power button 84 and the test light button 86 can be arranged at any edge area of the upper cover 81 of the shell.

[0068] Optionally, the sizes of the second hole, the third hole and the fourth hole can be set according to the sizes of the buttons or the indicator lights to be arranged. In the present application, the sizes are not limited.

[0069] Optionally, the upper cover 81 of the shell further comprises a plurality of indicator lights 87 connected with the signal display module, and the plurality of indicator lights 87 are arranged in a plurality of fifth holes arranged on the upper cover 81 of the shell. Optionally, the plurality of indicator lights 87 can be LED signal lights, and the LED signal light can be an LED (Light Emitting Diode).

[0070] Optionally, the plurality of fifth holes and the third hole correspondingly have mounting seats for the plurality of indicator lights 87 and the power indicator 85. The mounting seats can be made of metal and are used for mounting the plurality of indicator lights 87 and the power indicator 85.

[0071] Optionally, the plurality of indicator lights 87 can be 16, and are connected with 16 digital input channels of the input connector 83 one by one, and are respectively used for indicating whether there is an input signal input in each input channel.

[0072] Optionally, the upper cover 81 of the shell further comprises a plurality of voltage test terminals 88 connected with the voltage detection module 3, and the plurality of voltage test terminals 88 are arranged in a plurality of sixth holes arranged on the upper cover 81 of the shell. The plurality of voltage test terminals 88 comprise a plurality of negative voltage test terminals and a plurality of positive voltage test terminals.

[0073] Optionally, the plurality of voltage test terminals 88 can be made of metal material, externally provided with an insulating protective sleeve, and there are 20 voltage test terminals, of which 16 are positive voltage test terminals and 4 are negative voltage test terminals. The 16 positive voltage test terminals are respectively connected in one-to-one correspondence with the 16 digital quantity input channels, and the 4 negative voltage test terminals are respectively connected in one-to-one correspondence with the 4 negative channels, i.e. the indicator lamp, the positive voltage test terminal and the digital quantity input channel are correspondingly arranged. As shown in FIG. 4(2), the right side of the shell upper cover 81 is provided with 4 negative voltage test terminals, such as Z8, Z16, Z24 and Z32, which are 4 negative voltage test terminals, i.e. the negative electrode GND of the input signal. The middle is provided with 16 positive voltage test terminals, such as B2, B4, B6, B8, B10, B12, B14, B16, B18, B20, B22, B24, B26, B28, B30 and B32, which are 16 positive voltage test terminals, i.e. the positive electrode of the input signal. And one indicator lamp 87 and one positive voltage test terminal constitute a corresponding group, a total of 16 groups, which can form a 4x4 array. It should be noted that the arrangement of the 16 groups of indicator lamps-positive voltage test terminals on the shell upper cover can be set according to the requirements, and the above is only an example.

[0074] Optionally, labels are arranged near the positive voltage test terminals, negative voltage test terminals, indicator lamps, power button, test lamp button and power indicator on the shell upper cover 81 to mark the names of the corresponding devices or corresponding channels.

[0075] Optionally, as shown in FIG. 4(1), it further includes a fixing device 89; the fixing device 89 is arranged on the side where the input connector 83 is located, and is respectively arranged at the corresponding positions of the shell upper cover 81 and the shell lower cover 82. Wherein, the fixing device 89 can be a hook-and-loop fastener, including a hook-and-loop fastener A surface 891 and a hook-and-loop fastener B surface 892, one of which is a hook surface and the other is a loop surface, which can be bonded to fix the standard EMU DI digital quantity input signal fault detection device and the DI digital quantity input board card plug, preventing the standard EMU DI digital quantity input signal fault detection device and the DI digital quantity input board card plug from falling off.

[0076] The connection circuit of the standard motor train unit DI digital input signal fault detection device is shown in FIG. 5(1) and FIG. 5(2). The input connector X1 of the input connection module includes 48 pins. The pin B2 is connected to one end of the fuse F1. The other end of the fuse F1 is connected to one end of the resistor R1 and the first pin of the connector CN7. The pins B4, B6, B8, B10, B12, B14, B16, B18, B20, B22, B24, B26, B28, B30, and B32 of the input connector X1 are connected to one end of the fuses F2-F16 respectively, and the other end of the fuses F2-F16 is connected to one end of the resistors R2-R16 and the other pins of the connector CN7. The sixteenth pin of the connector CN7 is empty. The pins B2, B4, B6, B8, B10, B12, B14, B16, B18, B20, B22, B24, B26, B28, B30, and B32 of the input connector X1 are the positive poles of the input signals. The pins Z8 and Z16 of the input connector X1 are connected to the fourth pin and the thirteenth pin of the relay K9 respectively, and the pins Z24 and Z32 are connected to the fourth pin and the thirteenth pin of the relay K10 respectively. The other pins of the input connector X1 are empty. The pins Z8, Z16, Z24, and Z32 of the input connector X1 are the negative poles of the four input signals.

[0077] The other end of the resistor R1 is connected to the fourth pin of the relay K1, and the other end of the resistor R2 is connected to the thirteenth pin of the relay K1. The sixth pin and the eleventh pin of the relay K1 are connected to the negative pole of the corresponding diode and the corresponding connector in the circuit protection module respectively. The positive pole of the diode is connected to the corresponding resistor and then connected to the fourth pin of the connector CN2. For example, in FIG. 5, the sixth pin of the relay K1 is connected to the negative pole of the diode D3 and the fifth pin of the connector CN3, and the positive pole of the diode D3 is connected to the resistor R17 and then connected to the fourth pin of the CN2. The resistors R17-R32 function as current limiting, and the diodes D3-D18 function as current direction limiting and isolation to prevent high voltage from entering the circuit. The relay module includes ten relays, and the connection mode of the relays K2-K8 is the same as that of the relay K1. The first pins of the relays K1-K10 are connected to the fourth pin of the connector CN2, and the first pins of the relays K1-K5 are also connected to the negative pole of the diode D1, and the positive pole of the diode D1 is grounded. The first pins of the relays K6-K10 are also connected to the negative pole of the diode D2, and the positive pole of the diode D2 is grounded. The sixteenth pins of the relays K1-K10 are connected to the ground, and the eighth and ninth pins of the relays K9 and K10 are grounded.

[0078] The sixth pin and the eleventh pin of the relay K9 are connected with the first pin of the connector CN3 and CN4 respectively, and the sixth pin and the eleventh pin of the relay K10 are connected with the first pin of the connector CN5 and CN6 respectively.

[0079] The first pin of the connector CN1 is grounded, the second pin is connected with the positive power supply, and is also connected with the first pin of the connector CN2, the fifth pin of the connector CN2 is grounded, and the second pin and the third pin are connected in series with the resistance R33.

[0080] One end of the power button of the power module is connected with the positive power supply, and the other end of the power button is connected with the second pin of the connector CN2', one end of the test lamp button of the test lamp module is connected with the positive power supply, and the other end of the test lamp button is connected with the fourth pin of the connector CN2', the positive end of the power indicator lamp is connected with the third pin of the connector CN2', and the negative end of the power indicator lamp is grounded. When the power button is pressed, CN2' is powered on, and the power indicator lamp is lit.

[0081] The positive ends of the LED light emitting diodes LED1-LED16 of the signal display module are respectively connected with corresponding connectors, for example, the positive ends of the light emitting diodes LED1-LED4 are respectively connected with the second pin, the third pin, the fourth pin and the fifth pin of the connector CN3', and the negative ends of the light emitting diodes LED1-LED4 are connected with the first pin of the connector CN3'; the positive ends of the light emitting diodes LED5-LED8 are respectively connected with the second pin, the third pin, the fourth pin and the fifth pin of the connector CN4', and the negative ends of the light emitting diodes LED5-LED8 are connected with the first pin of the connector CN4'; the positive ends of the light emitting diodes LED9-LED12 are respectively connected with the second pin, the third pin, the fourth pin and the fifth pin of the connector CN6', and the negative ends of the light emitting diodes LED9-LED12 are connected with the first pin of the connector CN6'; the positive ends of the light emitting diodes LED13-LED16 are respectively connected with the second pin, the third pin, the fourth pin and the fifth pin of the connector CN5', and the negative ends of the light emitting diodes LED13-LED16 are connected with the first pin of the connector CN5'.

[0082] The positive voltage test terminals of the plurality of voltage test terminals connected with the voltage detection module are respectively connected with corresponding pins of the connector CN7', for example, the voltage test terminal B2 is connected with the first pin of the connector CN7', the voltage test terminal B4 is connected with the second pin of the connector CN7', and so on. Four negative voltage test terminals of the voltage test terminals are respectively connected with the first pin of the connector CN3', CN4', CN5' and CN6'.

[0083] It should be noted that the connector CN2 and the connector CN2' are respectively a male connector and a female connector matched with each other, and the connector CN3 and the connector CN3' are respectively a male connector and a female connector matched with each other, the connector CN4 and the connector CN4' are respectively a male connector and a female connector matched with each other, the connector CN5 and the connector CN5' are respectively a male connector and a female connector matched with each other, the connector CN6 and the connector CN6' are respectively a male connector and a female connector matched with each other, and the connector CN7 and the connector CN7' are respectively a male connector and a female connector matched with each other. In this way, the input connector is connected to the relay and the voltage test terminal through the fuse, the relay is connected to the indicator lamp, and 16 digital input channels and 4 negative channels are formed.

[0084] When the standard motor train set DI digital input signal fault detection device provided by the application is used for fault detection, the following steps can be performed:

[0085] (1) First, check whether the appearance and the identification on the corresponding channel are complete. After determining that they are complete, turn on the power supply (i.e., press the power button), the corresponding power indicator light is on, then press the test lamp button, and the 16 LED light-emitting diodes on the standard motor train set DI digital input signal fault detection device are all powered, indicating that the standard motor train set DI digital input signal fault detection device is normally reliable and has no fault, and the subsequent DI digital input signal fault processing operation can be performed.

[0086] (2) Connect the input connector of the standard motor train set DI digital input signal fault detection device with the DI digital input signal board card plug, and after the connection is firm and reliable, the input connector of the standard motor train set DI digital input signal fault detection device and the DI digital input signal board card plug establish electrical connection, and the input signals of all DI digital input signal input channels on the DI digital input signal board card plug are input into the standard motor train set DI digital input signal fault detection device.

[0087] (3) The standard motor train set DI digital input signal fault detection device is connected to the DI digital input signal fault board card through the Velcro A and B two sides of the fixing device, so that the Velcro is firmly connected to the DI digital input signal fault board card.

[0088] (4) Determine the LED light-emitting diode corresponding to the fault channel, and check whether the LED light-emitting diode is on. If the LED light-emitting diode is not on, it can be judged that the peripheral circuit has a fault and the DI digital input signal board card is normal. If the LED light-emitting diode is on, it can be judged that the DI digital input signal board card has a fault and the peripheral circuit is normal.

[0089] ⑤ When a fault occurs in the peripheral circuit, a multimeter can be used to check the voltage polarity and value of the faulty channel to further inspect the peripheral circuit. If the multimeter displays 0V, the peripheral circuit fault can be accurately identified. After identifying the peripheral circuit fault, disconnect the standard EMU DI digital input signal fault detection device from the DI digital input signal board connector, and disconnect the power supply to the standard EMU DI digital input signal fault detection device, then turn it off.

[0090] The standard EMU digital input signal fault detection device can be used during the debugging of the peripheral circuits of the standard EMU digital input circuit to detect the peripheral circuits of the DI digital input board. This prevents damage to the DI digital input signal board due to overvoltage or overcurrent caused by faults in the peripheral circuits, thus protecting the DI digital input signal board. The detection steps are as follows:

[0091] Steps 1-3 are the same as steps 1-3 in the fault detection process described above, and will not be repeated here.

[0092] (4) Operate the peripheral circuitry of the DI digital input signal board to activate the corresponding input signal. According to the electrical design logic of the standard EMU, the LED light-emitting diode of the corresponding channel on the standard EMU DI digital input signal fault detection device will light up. At the same time, check whether the label number of the LED light-emitting diode on this channel is consistent with the number of the signal input channel in the design circuit. If they are inconsistent, it indicates that the wiring of the peripheral circuitry of the DI digital input signal board is incorrect. After verifying and modifying the wiring of the peripheral circuitry of the DI digital input signal board, verify again using the standard EMU DI digital input signal fault detection device until the indicator light status of the LED light-emitting diode of the corresponding channel is consistent with the DI digital input signal.

[0093] (5) Use a multimeter to test the voltage polarity and voltage value of the input channel corresponding to the fault detection device for the DI digital input signal of the standard EMU, and check whether it conforms to the voltage polarity and voltage value of the corresponding channel of the DI digital input board.

[0094] (6) After verifying that the input signals of all channels of the DI digital input signal board are correct according to the above steps, disconnect the standard EMU DI digital input signal fault detection device from the DI digital input signal board plug, disconnect the power supply of the DI digital input signal fault detection device, and turn it off.

[0095] The standard motor train unit DI digital quantity input signal fault detection device is connected with a DI digital quantity input board card providing DI digital quantity input signals on the motor train unit through an input connection module, and detects whether the DI digital quantity input board card has a fault. When the DI digital quantity input board card has a fault, a signal display module connected with the input connection module is lighted. In order to further detect the fault position, a voltage detection module connected with the input connection module detects the voltage polarity and voltage value of the input signal, so that the line fault can be more accurately judged, the fault detection efficiency is improved, and the problems of difficult, complicated and long time-consuming fault detection of the DI digital quantity input board card in the prior art are solved. Moreover, the present application can further detect the fault of the peripheral line, so that the staff can quickly determine the fault position for maintenance. Moreover, each signal input channel of the standard motor train unit DI digital quantity input signal fault detection device corresponds to a voltage test terminal and an indicator, and the voltage test terminal has a terminal mark, so that the signal input is one-to-one corresponding, so that whether the signal of the input channel is correct or not can be judged through the indicator of the corresponding channel, and the voltage test terminal is provided to facilitate the staff to measure the voltage polarity and voltage value of the input signal.

[0096] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A standard motor train unit (DI) digital input signal fault detection device, characterized in that, The application relates to a standard motor train unit DI digital quantity input signal fault detection device. The device comprises an input connection module connected with a DI digital quantity input card provided with an input signal on a standard motor train unit, which is used to introduce the input signal into the standard motor train unit DI digital quantity input signal fault detection device; a signal display module connected with the input connection module, which is used to light up when the DI digital quantity input card has a fault; and a voltage detection module connected with the input connection module, which is used to detect the voltage polarity and voltage value of the input signal when the DI digital quantity input card has a fault. The device further comprises an upper housing cover and a lower housing cover. The upper housing cover and the lower housing cover are fastened to form a cavity for accommodating all modules of the standard motor train unit DI digital quantity input signal fault detection device. The device further comprises a plurality of indicator lamps connected with the signal display module, which are arranged in a plurality of fifth holes arranged on the upper housing cover; and a plurality of voltage test terminals connected with the voltage detection module, which are arranged in a plurality of sixth holes arranged on the upper housing cover, wherein the plurality of voltage test terminals comprise a plurality of negative voltage test terminals and a plurality of positive voltage test terminals. The indicator lamps, the positive voltage test terminals and the digital quantity input channels are correspondingly arranged, and labels are arranged near the indicator lamps, the plurality of positive voltage test terminals and the plurality of negative voltage test terminals on the upper housing cover to indicate the corresponding channels. The device further comprises a power module connected with the input connection module, the signal display module and the voltage detection module, which is used to provide electric energy for the input connection module, the signal display module and the voltage detection module; and a test lamp module connected with the power module and the signal display module, which is used to detect whether the standard motor train unit DI digital quantity input signal fault detection device has a fault before input signal fault detection. The device further comprises a relay module connected between the test lamp module and the voltage detection module, which is further connected with the power module. The device further comprises a circuit protection module connected with the input connection module and the power module, which is used to protect the standard motor train unit DI digital quantity input signal fault detection device. The input connection module is an input connector comprising a plurality of pins, and the pins are male pins.

2. The standard DMU DI digital input signal fault detection apparatus of claim 1, wherein, A first hole for mounting the input connection module is arranged on one side of the lower housing cover. The input connector comprises a plurality of digital quantity input channels and a plurality of negative channels. The device further comprises a power button, a power indicator lamp and a test lamp button.

3. The standard DMU DI digital input signal fault detection apparatus of claim 2, wherein, The power button is connected with the power module and arranged in a second hole arranged on the upper housing cover. The power indicator lamp is connected with the power module and arranged in a third hole arranged on the upper housing cover, and the power indicator lamp is arranged around the power button.

4. The standard DMU DI digital input signal fault detection apparatus of claim 2, wherein, The test lamp button is connected with the test lamp module and arranged in a fourth hole arranged on the upper housing cover. The device further comprises a fixing device.

5. The standard DMU DI digital input signal fault detection apparatus of claim 1, wherein, The fixing device is arranged on one side of the input connector and arranged at corresponding positions of the upper housing cover and the lower housing cover. ​ 6. The standard DMU DI digital input signal fault detection apparatus of claim 5, wherein, ​ 7. The standard DMU DI digital input signal fault detection apparatus of claim 2, wherein, ​ ​ ​ ​ 8. The standard DMU DI digital input signal fault detection apparatus of claim 5, wherein, ​ ​

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