Testing device for testing RIM module of diesel locomotive

Abstract

The utility model discloses a testing device for testing an RIM module of a diesel locomotive, which comprises the RIM module and a case, a relay module, a resistance measuring unit, a transistor output module, an NPN output module, a switching power supply, a variable voltage power supply module and a display unit are arranged in the case, the RIM module is electrically connected with the input end of the relay module, and the input end of the transistor output module is electrically connected with the input end of the NPN output module. The output end of the relay module is electrically connected with the input end of the resistance measuring unit, the input end of the transistor output module and the input end of the NPN output module, and the output end of the resistance measuring unit is electrically connected with the input end of the NPN output module and the switching power supply. The output end of the transistor output module and the output end of the NPN output module are electrically connected with the display unit, the switching power supply and the NPN output module respectively. According to the testing device, the cost can be effectively reduced, the service life of the RIM module of the HXN5 type diesel locomotive is reasonably prolonged, and it is guaranteed that the RIM module is convenient to maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical maintenance of diesel locomotives, and in particular relates to a testing device for testing a RIM module of a diesel locomotive. Background Art

[0002] The RIM module (full name: Relay Interface Module) of the HXN5 diesel locomotive is manufactured by GE of the United States. This plug-in module lacks both technical support and spare parts supply for my country's locomotive maintenance system, which has brought many restrictions and technical barriers. The main reason for the increased difficulty of independent repair is the lack of necessary maintenance equipment. As the main model, the HXN5 diesel locomotive has always been responsible for the freight traction task of the Beijing-Tong Line. With the normal wear and tear of the locomotive during driving, such as the increase in mileage and the increase in service life, the failure rate of the RIM module of the HXN5 diesel locomotive has also increased, which has a great impact on the stable operation of the locomotive, transportation order and maintenance production.

[0003] Traditionally, the only way to inspect RIM modules is to simply use a multimeter to measure the resistance of each plug one by one, which cannot measure accurate data and parameters, and is inefficient and time-consuming. Moreover, this traditional method cannot meet the needs of maintenance workers to inspect and test RIM modules at the same time, that is, to see the real-time changes of all plug resistances and communication logic at all times. Utility Model Content

[0004] The utility model aims to provide a testing device for testing a RIM module of a diesel locomotive, so as to solve the technical problems existing in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A test device for testing a RIM module of a diesel locomotive, comprising:

[0007] A RIM module and a chassis, wherein a relay module, a resistance measuring unit, a transistor output module, an NPN output module, a switching power supply, a transformer power supply module and a display unit are arranged in the chassis, wherein the RIM module is electrically connected to the input end of the relay module, the output end of the relay module is electrically connected to the input end of the resistance measuring unit, the input end of the transistor output module and the input end of the NPN output module respectively, the output end of the resistance measuring unit is electrically connected to the input end of the NPN output module and the switching power supply respectively, and the output end of the transistor output module and the output end of the NPN output module are electrically connected to the display unit, the switching power supply and the NPN output module respectively.

[0008] Optionally, the RIM module is provided with four sockets, each socket having a plurality of pins, and the testing device also includes four plugs. Each socket of the RIM module is connected and locked with a corresponding plug, and each pin of the RIM module is electrically connected to the input end of the relay module in sequence according to a preset coding sequence, so as to perform resistance voltage division through the relay module.

[0009] Optionally, a relay module and a resistance measuring unit are fixed on the chassis bottom plate, a transistor output module and an NPN output module are fixed on the chassis top plate, a switching power supply, a filter and a transformer power supply module are fixed on the chassis back plate, and the chassis front panel has an inherent display unit, a selection switch and an emergency stop switch.

[0010] Optionally, the filter, emergency stop switch, selection switch and switching power supply are connected in series in sequence.

[0011] Optionally, the resistance measuring unit includes three four-channel milliohmmeters, each of which is connected in sequence, and the input end of each four-channel milliohmmeter is electrically connected to the output end of the relay module, and the output end of each four-channel milliohmmeter is electrically connected to the input end of the NPN output module and the switching power supply.

[0012] Optionally, a status display area, a test result display area, an operation button area, a relay setting area and a system setting area are provided on the display interface of the display unit.

[0013] Optionally, the display unit adopts a touch display screen.

[0014] Optionally, the touch screen adopts an MCGS embedded integrated touch screen, wherein the MCGS embedded integrated touch screen is electrically connected to a switching power supply and a transformer power supply module.

[0015] Optionally, the model of the RIM module is 1006777-903 and 1006777-904.

[0016] Beneficial effects:

[0017] 1) The test device of the present application can effectively reduce costs, reasonably extend the service life of the RIM module of the HXN5 diesel locomotive, and ensure its convenient maintenance. According to the RIM module of the HXN5 diesel locomotive, the test device is used to simulate the locomotive operating conditions of the RIM module, realize the off-vehicle test of the RIM module, effectively reduce the maintenance time, and has great promotion value.

[0018] 2) The HXN5 RIM module test bench provides a single channel resistance measurement circuit for each plug, so that it can continuously and instantly display the measurement results of all plug resistances. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An electrical schematic diagram of a test device for testing a RIM module of a diesel locomotive provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a chassis bottom plate provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of a front panel of a chassis provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of a chassis top plate provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of a chassis backplane provided in an embodiment of the present application;

[0024] Figure 6 This is an operation interface diagram of a full module test of a RIM module provided in an embodiment of the present application;

[0025] Figure 7 An operation interface diagram of a full module test of a 1006777-904 model RIM module provided in an embodiment of the present application;

[0026] Figure 8 A relay test and resistance threshold setting interface diagram provided in an embodiment of the present application;

[0027] Fig. 9 This is an interface diagram of a system settings area provided in an embodiment of the present application.

[0028] Description of Figure Numbers:

[0029] 1. Transistor output module; 2. NPN output module; 3. Relay module; 4. Resistance measurement unit; 5. Display unit; 6. Chassis; 7. Filter; 8. Transformer power supply module; 9. Switching power supply; 10. Selector switch; 11. Emergency stop switch. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] In the present invention, the terms "install", "set", "provided with", "connect", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] Embodiment 1:

[0035] The working principle of the RIM module of the HXN5 diesel locomotive is to control the conversion of air braking force and traction force electrical signals. For example, when the locomotive implements emergency braking, the microcomputer gives instructions to the RIM module. Once the instruction is received, the RIM module starts to execute, and will respond quickly and trigger the corresponding operation to achieve the purpose of cutting off traction force, thereby realizing the emergency braking of the locomotive. This is a process with strict requirements on time and accuracy, and is an important link to ensure the safe operation of the locomotive.

[0036] like Figure 1 As shown, this embodiment provides an electrical schematic diagram of a test device for testing a RIM module of a diesel locomotive, including: a RIM module and a chassis 6, wherein a relay module 3, a resistance measuring unit 4, a transistor output module 1, an NPN output module 2, a switching power supply 9, a transformer power supply module 8 and a display unit 5 are arranged in the chassis 6.

[0037] Wherein, the transistor output module 1 is a 20-channel transistor output module, and the NPN output module 2 is a 32-channel NPN output module; wherein, Figure 2Schematic diagram of the structure of the chassis 6 bottom plate, the chassis 6 bottom plate is fixed with a relay module 3 and a resistance measurement unit 4, Figure 4 is a schematic diagram of the top plate of the chassis 6, on which the transistor output module 1 and the NPN output module 2 are fixed. Figure 5 Schematic diagram of the structure of the back plate of the chassis 6, the back plate of the chassis 6 is fixed with a switching power supply 9, a filter 7 and a transformer power supply module 8, Figure 3 It is a structural diagram of the front panel of the chassis 6, and the front panel of the chassis 6 has a display unit 5, a selection switch and an emergency stop switch 11. The RIM module is electrically connected to the input end of the relay module 3, and the output end of the relay module 3 is electrically connected to the input end of the resistance measuring unit 4, the input end of the transistor output module 1 and the input end of the NPN output module 2 respectively. The output end of the resistance measuring unit 4 is electrically connected to the input end of the NPN output module 2 and the switching power supply 9 respectively, and the output end of the transistor output module 1 and the output end of the NPN output module 2 are electrically connected to the display unit 5, the switching power supply 9 and the NPN output module 2 respectively. Among them, the functions of the transistor output module 1 and the NPN output module 2 are signal conversion and power supply, and the transformer power supply module 8 is DC-DC, which is used to start the boost function.

[0038] As an embodiment of the present application, the RIM module is provided with four sockets, J1, J2, J3 and J4 (refer to Figure 1 ), each socket has several pins. The wiring and connection of the pins of these four sockets in the RIM can be summarized into five types: wire straight-through, 1K / 8K / 9K resistor, diode, relay coil, and relay contact. This test device (test bench) measures the corresponding resistance or voltage value according to the five connection conditions between the pins of the socket to determine whether each connection is normal. At the same time, the test bench will power on the relay to check whether the relay is operating and functioning normally. This test bench uses three dedicated 4-channel milliohm meters to gradually complete the measurement of 48 different parameters in four times.

[0039] It should be noted that each four-channel milliohmmeter is connected in sequence, and the input end of each four-channel milliohmmeter is electrically connected to the output end of the relay module 3, and the output end of each four-channel milliohmmeter is electrically connected to the input end of the NPN output module 2 and the switch power supply 9. All measured parameters are displayed on the touch screen. The test device for measuring the RIM module of a diesel locomotive also includes four plugs, each socket of the RIM module is connected and locked with a corresponding plug, and each pin of the RIM module is electrically connected to the input end of the relay module 3 in sequence according to a preset coding sequence, for resistive voltage division through the relay module 3.

[0040] As an embodiment of the present application, the filter 7, the emergency stop switch 11, the selection switch and the switching power supply 9 are connected in series in sequence. The filter 7 is used to process the signal and select, enhance or suppress the frequency of the signal according to a specific frequency response characteristic. If the emergency stop switch 11 fails during the test, the emergency stop switch 11 can be selected to stop the test and protect the entire test device. The switching power supply 9 is used to power the entire test device (test bench). The selection switch is the main switch. When testing the RIM module, the selection switch is turned on. When the test is completed, the selection switch is turned off.

[0041] At the same time, the resistance measurement resolution of this test bench is 0.1mΩ, so it can identify the crimping defects and slight poor contact between the straight-through wires and the pins at both ends in the RIM module. Under normal circumstances, the measurement values ​​of these straight-through wires should be between 10mΩ and 50mΩ, and those greater than 100Ω can be considered defects. However, under normal circumstances, these defects do not affect the normal use of the RIM module. The contact resistance of the relay contact is the same. Its contact resistance will deteriorate after aging, but it generally does not affect its use. For specific circumstances, the user can make their own judgment based on their own experience.

[0042] This HXN5 locomotive RIM module test bench fills the gap of such a test bench and improves the work efficiency of maintenance operations. This design can provide a separate resistance measurement circuit for each plug and socket of the RIM module, so that it can continuously and instantly display the measurement results of all plugs and sockets. This method allows maintenance workers to see the changes in the resistance of all plugs and sockets at all times, meeting the needs of maintenance workers to measure while repairing. The actual use of the test bench has proved that it has stable performance, simple operation, and good application and promotion value.

[0043] Embodiment 2:

[0044] When testing the RIM module of HXN5 diesel locomotive using the test device:

[0045] Step 1: Connect the RIM module to be tested

[0046] First check that the pins of the RIM module are normal and ensure that there are no broken, crooked pins, shrinkage holes, or blocked holes. Then reliably connect and lock the four plugs of the test bench with the four corresponding sockets of the RIM module under test. This is very important. Deformed pins may damage the plugs of the test bench. Turn on the power and wait for the system to start normally.

[0047] Step 2: Operation interface and operation of RIM module full module test

[0048] Turn on the power, then touch the display screen interface 1006777-903 standby test interface, refer to Figure 6This interface is divided into three areas: measurement result display area (table form), status display area, and operation button area.

[0049] 2.1 Status display area:

[0050] It is used to display the different states of the measurement process and the final test conclusions. In standby mode, the status window will display a white "Ready", a yellow "Testing..." during the measurement process, and a green "Passed" if the RIM module under test passes the test, and a red "Failed" if it fails the test.

[0051] 2.2 Measurement result display area:

[0052] The measurement results of various parameters of the RIM module are displayed in a table. The table is divided into 5 columns:

[0053] The "Object" column is the connection between the pins of each socket of the RIM module under test. For example, J1.C-J3.A refers to the connection between the C pin of the J1 socket and the A pin of the J3 socket;

[0054] The "Connection" column shows the type of connection. In summary, there are 5 types: wire through, 1K / 8K / 9K resistor, diode anode to cathode, relay coil, relay contact (open / closed).

[0055] The “Reference Value” column is the numerical range of the measured parameter under normal conditions;

[0056] The "Measured Value" column displays the values ​​of each connection measured by the test bench in blue. If the measured value exceeds the reference value, a red dot "·" warning will be displayed outside the table immediately to the right of the measured value. This warning is used uniformly in all interfaces of this test bench, that is, a red dot "·" is displayed on the left or right side of the measured value to indicate an out-of-tolerance. The leftmost column displays the test steps: a total of 4 steps to complete a measurement. During each measurement, the number of steps will flash in the leftmost column.

[0057] 2.3 Operation button area:

[0058] There are 4 buttons in the operation button area of ​​the RIM module full module test interface:

[0059] 1) Start / Pause button:

[0060] In the standby (status: ready) state, press this button to start the detection of the RIM module. The test bench will gradually complete all parameter measurements in 4 steps and display the measured values ​​in the table; if the test bench is already in the "testing..." state, that is, in one of the 4 steps, press the start / pause button at this time, the test will pause and stay at the step being measured. The measured values ​​of this step in the table will also be continuously updated in the table in real time. This function is used to realize the "what you see is what you get" viewing of measurement results while repairing; if the test bench is in the above-mentioned pause state, press the button again to resume the next measurement step and finally complete this round of measurement.

[0061] 2) Reset clear button:

[0062] Used to reset and clear the last measurement results, and the system will immediately return to standby mode. If the system is in "Testing...", pressing this button will terminate the current round of measurement and return the system to standby mode. This operation requires 1-3 seconds of response time.

[0063] 3) 903 / 904 switch:

[0064] This button is used to switch between two different RIM modules, that is, between 1006777-903 and 1006777-904. The test interface of 904 RIM is basically the same as that of 903, except that the display table of measurement results has several more rows because 904 has more connections. For specific interface, refer to Figure 7 .

[0065] 4) Relay & Setting Button:

[0066] Clicking this button will enter the relay test and resistance threshold setting interface to measure and test the PCS relay in the RIM module separately. This interface also includes the setting function of the resistance reference value threshold for wire straight-through and contact closure.

[0067] Step 3: Relay test and resistance threshold setting interface and operation

[0068] This interface is divided into 4 areas: relay test area, status display window, operation button area, system setting area, refer to Figure 8 The relay test area includes the relay action animation diagram and two test value display areas: the contact value area and the diode / coil value area.

[0069] 3.1 Status display window

[0070] The status display window is the same as the operation interface of the RIM module full module test, which is used to display the different states of the measurement process and the final test conclusions. In standby mode, the status window will display white "Ready", yellow "Measure diode...", "Measure coil...", "Measure contact..." during the measurement process, and green "Pass" if the relay passes the test, and red "Fail" if it fails the test.

[0071] 3.2 Operation button area

[0072] There are 4 buttons in the operation button area of ​​the relay test and resistance threshold setting interface:

[0073] 1) Single button:

[0074] In the standby (status: ready) state, if you press this button, the relay detection will be started. The test bench will measure in 4 steps: the forward voltage of the diode connected to the E and C pins of the J2 socket, the resistance of the relay coil connected to the E and C pins of the J2 socket, the contact resistance when the contacts connected to the V and W pins of the J4 socket are closed after the relay is powered on, and the insulation resistance when the relay contacts are open when the power is off. After the first two steps are completed, the forward voltage of the diode and the resistance of the relay coil are displayed in the diode / coil value area; if the forward voltage of the diode is less than 0.2V or the resistance of the relay coil is less than 100 ohms, it is judged that the coil is short-circuited or the diode is broken down. At this time, the status display window directly reports "failure" and no longer proceeds to the next two steps. If the measured values ​​of the diode and coil are normal, continue to the next two steps; after the next two steps are completed, the contact resistance when the contacts are closed and whether the contacts are disconnected normally when they are opened are displayed in the contact value area. If the resistance when the contacts are closed is greater than the set reference value or there is a sticking short circuit after the contacts are opened, it is judged as a failure.

[0075] 2) Multiple button presses:

[0076] After pressing the button multiple times, the system will cycle the relay on and off according to the set "Relay Test Times", and detect whether the contact resistance of the contacts is normal and whether they are separated normally after power failure. A maximum of 5000 cycles can be set. At the beginning of the first measurement, as with a single measurement, the diode forward voltage and relay coil resistance need to be measured first. If the diode forward voltage is less than 0.2V or the relay coil resistance is less than 100 ohms, it is judged as a coil short circuit or a diode breakdown. At this time, the status display window directly reports "failure" and no longer performs all subsequent tests. If the diode and coil measurement values ​​are normal, the relay will be cycled on and off according to the set test times. The table in the contact value area shows the contact resistance when the contacts are closed each time they are powered on and whether they are disconnected normally when the contacts are opened when the power is off, as well as the number of measurements. The number of measurements is displayed as "current number / total number", for example, "3 / 5" means that the total number is 5 times, and the third measurement is currently in progress. If a measurement fails in multiple measurements, the system will stop and no subsequent tests will be performed. The "number of measurements" can be used to determine the number of times a test has failed.

[0077] 3) Reset button:

[0078] Used to reset and clear the last measurement results, and the system will immediately return to standby mode. If the system is testing, pressing this button will stop the measurement and return the system to standby mode. This operation may take 1-3 seconds to respond.

[0079] 4) Back button:

[0080] Click this button and the system will jump to the RIM module full module test interface (903 type), which is the standby interface after booting up.

[0081] 3.3 System Settings Area

[0082] The system setting area can set 4 system parameters, and the set parameters can be permanently saved by clicking the "Save Settings" button. Fig. 9. The next time the test bench is restarted, these saved parameters will be displayed in the window. Cable resistance threshold setting: The resistance value of the straight-through cable inside the RIM module is between 10mΩ and 20mΩ according to its cable model and length. The value entered when setting this threshold must be in the range of 100mΩ to 1000mΩ. Considering the contact resistance between the test bench plug and the RIM module socket pin, the normal measured value should be between 10mΩ and 50mΩ, and the recommended threshold value is 200mΩ. Relay contact contact resistance threshold setting: The relay contact of the RIM module is connected between the V and W pins of the J4 socket. When the relay contact is closed, considering the superposition of the cable resistance and the contact resistance between the pins, the resistance value of the contact should be around 70mΩ. The threshold setting range limited by this test bench is 100mΩ to 1000mΩ, and the value entered when setting must be in this range. As the relay ages, the contact resistance of the contacts increases, and the recommended threshold value is 500mΩ. Relay test times setting: "Multiple" is the number of times to test the relay, which can be set from 1 to 5000 times.

[0083] In order to expose the dynamic quality problems of the relay, this test bench is set to power on and off the relay multiple times, as well as power on and close for a long time. "Each closing time" setting: When the relay is powered on once or multiple times, this "Each closing time" is the time the relay is powered on continuously, in seconds. The setting range is 1 to 30 seconds.

[0084] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A test device for testing a RIM module of a diesel locomotive, characterized in that: include: A RIM module and a chassis, wherein a relay module, a resistance measuring unit, a transistor output module, an NPN output module, a switching power supply, a transformer power supply module and a display unit are arranged in the chassis, wherein the RIM module is electrically connected to the input end of the relay module, the output end of the relay module is electrically connected to the input end of the resistance measuring unit, the input end of the transistor output module and the input end of the NPN output module respectively, the output end of the resistance measuring unit is electrically connected to the input end of the NPN output module and the switching power supply respectively, and the output end of the transistor output module and the output end of the NPN output module are electrically connected to the display unit, the switching power supply and the NPN output module respectively.

2. The test device for testing the RIM module of a diesel locomotive according to claim 1, wherein the RIM module is provided with four sockets, each of which has a plurality of pins, characterized in that: It also includes four plugs, each socket of the RIM module is connected and locked with a corresponding plug, and each pin of the RIM module is electrically connected to the input end of the relay module in sequence according to a preset coding sequence, so as to perform resistance voltage division through the relay module.

3. The testing device for testing the RIM module of a diesel locomotive according to claim 1, characterized in that: The chassis bottom plate is fixed with a relay module and a resistance measuring unit, the chassis top plate is fixed with a transistor output module and an NPN output module, the chassis back plate is fixed with a switching power supply, a filter and a transformer power supply module, and the chassis front panel has an inherent display unit, a selection switch and an emergency stop switch.

4. The testing device for testing the RIM module of a diesel locomotive according to claim 3, characterized in that: The filter, the emergency stop switch, the selection switch and the switching power supply are connected in series in sequence.

5. The testing device for testing the RIM module of a diesel locomotive according to claim 3, characterized in that: The resistance measuring unit includes three four-channel milliohm meters, each of which is connected in sequence, and the input end of each four-channel milliohm meter is electrically connected to the output end of the relay module, and the output end of each four-channel milliohm meter is electrically connected to the input end of the NPN output module and the switching power supply.

6. The testing device for testing the RIM module of a diesel locomotive according to claim 3, characterized in that: The display interface of the display unit is provided with a status display area, a test result display area, an operation button area, a relay setting area and a system setting area.

7. The testing device for testing the RIM module of a diesel locomotive according to claim 6, characterized in that: The display unit adopts a touch display screen.

8. The testing device for testing the RIM module of a diesel locomotive according to claim 7, characterized in that: The touch display screen adopts an MCGS embedded integrated configuration touch display screen, wherein the MCGS embedded integrated configuration touch display screen is electrically connected to a switching power supply and a transformer power supply module.

9. The testing device for testing the RIM module of a diesel locomotive according to claim 1, characterized in that: The models of the RIM modules are 1006777-903 and 1006777-904.

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