A simulation signal generating device for routine test of urban rail diesel locomotive

Abstract

The utility model discloses a kind of simulation signal generating device for routine test of urban rail transit diesel locomotive, including controller, display screen, connector and box body;The controller is arranged in the inside of box body, and signal input end is connected with display screen, and signal output end can be connected with locomotive microcomputer control system by connector;The display screen is arranged on the front of box body, and the connector is arranged on the side of box body.This simulation signal generating device can simulate locomotive sensor signal, when microcomputer control system monitors that the signal reaches protection threshold, executes corresponding protection measure, to verify microcomputer control system protection function, completes microcomputer control system protection function routine test.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, and in particular to a simulated signal generating device for routine testing of urban rail transit diesel locomotives. Background Technology

[0002] In actual operation, the microcomputer control system monitors the pressure, temperature, current, voltage, and other status signals of various systems in the locomotive in real time. Once a certain status parameter exceeds the threshold, the microcomputer control system will trigger the protection mechanism and execute corresponding protection measures to protect the equipment.

[0003] For example, invention patent application CN102745206A discloses a locomotive microcomputer control system and control method with integrated alert function. The locomotive microcomputer integrates various switching and analog information of the entire locomotive, and integrates the alert function into the microcomputer system. This makes it easier for the locomotive microcomputer to judge the driver's various actions according to the actual situation, respond to the driver's relevant responses, provide prompts and alarms to the driver, and record alert alarm events in real time. The locomotive microcomputer automatically determines the locomotive's running direction based on two sets of independent pulse trains with a phase difference of 90 degrees output from the speed sensor, so as to provide reverse power protection for the locomotive. After the locomotive microcomputer integrates the alert function, there is no need to add an additional alert device, saving hardware costs, reducing additional wiring procedures and installation space, and reducing the difficulty of system inspection and maintenance.

[0004] For example, invention patent application CN104670248A discloses a microcomputer control system for a diesel locomotive, including a microcomputer screen, a signal conversion screen, and a display. The microcomputer screen includes a central processing unit (CPU), a microcomputer power supply module, a digital output module, a digital input module, an excitation module, an analog expansion module, an analog-to-digital conversion module, a diesel engine speed control module, and a frequency input module. The CPU is used to control and manage various input and output signals of the diesel locomotive, and the excitation module is used to control the magnetic field current of the exciter using PWM. The microcomputer screen and the display communicate via RS232. This invention comprehensively utilizes multiple operating parameters to achieve complex and precise logical control of the operating structure, thereby achieving optimal control of the diesel locomotive system. Furthermore, it has a complete fault warning and protection program, improving the safety of the locomotive system operation.

[0005] For example, utility model patent CN2914441Y discloses an overload protection device for the main generator of an internal combustion locomotive, including a measuring circuit for detecting the output current of the main generator and an overcurrent protection relay installed in the measuring circuit; it also includes a microcomputer control system, traction motor current sensors for measuring the circuit current of each traction motor, and a DC-DC converter for converting the current signal measured by the measuring circuit into a DC voltage signal; the signal output terminals of each traction motor current sensor are connected to the rectified current signal input terminal of the microcomputer control system; the DC voltage signal output terminal of the DC-DC converter is connected to the pre-rectified current signal input terminal of the microcomputer control system; when the main generator overload is detected, the microcomputer control system controls the main generator to unload. At any operating speed, when the main generator is overloaded, it can immediately unload the main generator and issue an alarm through the microcomputer display screen.

[0006] Currently, during the routine factory testing phase of locomotives, it is necessary to test and verify the protection functions of the locomotive's microcomputer control system. Because locomotive protection thresholds are generally set quite high, and because locomotives lack dynamic trial operation conditions, it is difficult to trigger the protection measures of the microcomputer control system. Therefore, locomotive manufacturers typically use the following two methods to conduct testing and verification:

[0007] 1. By modifying the locomotive microcomputer control system software, the protection mechanism is triggered, thereby verifying the protection function of the microcomputer control system.

[0008] 2. By continuously applying high load through locomotive water resistance test or self-load test, the locomotive's water temperature, oil temperature, current, voltage and other parameters are artificially raised to the threshold required by the microcomputer protection.

[0009] However, both of these methods have certain problems:

[0010] 1. The method of modifying the locomotive microcomputer control system software is highly dependent on the microcomputer system manufacturer. The manufacturer needs to send personnel to the site to modify the software, which takes a long time and seriously affects the production schedule.

[0011] 2. Using locomotive water resistance tests or self-load tests requires maintaining the locomotive diesel engine at high speeds for extended periods. During this time, personnel must be on duty to protect the mechanical and electrical equipment, resulting in high labor intensity. Furthermore, the prolonged high-load operation of the diesel engine leads to high fuel consumption, noise pollution, and low production efficiency due to the extended test duration. Utility Model Content

[0012] To address the aforementioned issues, this invention proposes a simulated signal generating device for routine testing of urban rail transit diesel locomotives. This device can simulate locomotive sensor signals. When the microcomputer control system detects that the signal has reached a protection threshold, it executes corresponding protection measures, thereby verifying the protection function of the microcomputer control system and completing the routine test of the protection function of the microcomputer control system.

[0013] The technical solution adopted in this utility model is as follows:

[0014] A simulated signal generating device for routine testing of urban rail transit diesel locomotives includes a controller, a display screen, a connector, and a housing; the controller is located inside the housing, with its signal input end connected to the display screen and its signal output end connected to the locomotive's microcomputer control system via the connector; the display screen is located on the front of the housing, and the connector is located on the side of the housing.

[0015] Furthermore, the power input terminal of the controller is connected to the locomotive's onboard power supply via a connector.

[0016] Furthermore, the analog signal generator also includes a power switch, which is connected to the controller.

[0017] Furthermore, the power switch is located on the front of the enclosure.

[0018] Furthermore, the controller and the display screen are connected via an RS485 network.

[0019] Furthermore, the plug end of the connector is configured to have a reserved wire.

[0020] Furthermore, several heat dissipation holes are provided at the rear of the enclosure.

[0021] Furthermore, a handle is provided on the top of the box.

[0022] Furthermore, the controller is configured to output a corresponding analog signal based on the analog signal parameter setting value input from the display screen.

[0023] Furthermore, the analog signal parameter settings include the analog signal output channel, signal type, and magnitude.

[0024] The beneficial effects of this utility model are as follows:

[0025] 1) The analog signal generator of this utility model can replace locomotive sensors, send analog signals to the locomotive microcomputer control system, and accurately control parameters such as locomotive pressure, temperature, current, and voltage. It can also quickly verify the correctness of the protection function of the locomotive microcomputer control system.

[0026] 2) The analog signal generating device of this utility model replaces the original test process, bringing many significant advantages: significantly reducing fuel consumption and carbon emissions; significantly improving work efficiency and reducing labor intensity; effectively reducing material consumption costs; and avoiding long-term exposure of debugging personnel to noise and high-temperature environments, reducing the harmful effects on their health. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a simulated signal generating device used for routine testing of urban rail transit diesel locomotives.

[0028] Figure 2 This is a schematic diagram of the structure of a simulated signal generating device used for routine testing of urban rail transit diesel locomotives.

[0029] Reference numerals: 1-Controller, 2-Power switch, 3-Display screen, 4-Connector, 5-Heat vent, 6-Handle. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, specific embodiments are now described. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it; that is, the described embodiments are only a part of, and not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0031] like Figure 1 As shown, this embodiment provides a simulated signal generating device for routine testing of urban rail transit diesel locomotives, including a controller, a display screen, a connector, and a housing; the controller is located inside the housing, and its signal input end is connected to the display screen, while its signal output end can be connected to the locomotive's microcomputer control system via the connector; the display screen is located on the front of the housing, and the connector is located on the side of the housing.

[0032] It should be noted that the output signals of sensors used in urban rail diesel locomotives, such as those for temperature, pressure, and current, are generally divided into voltage-type and current-type. The locomotive's microcomputer control system performs calculations based on the detected current or voltage, converting it into actual values. When the actual value reaches a protection threshold, protective measures are executed. In this embodiment, the analog signal output channel, signal type, and magnitude can be set via a display screen. The controller outputs the corresponding analog signal to the microcomputer control system based on the set values. The microcomputer control system calculates the measured value based on the detected current or voltage. When this value reaches the protection threshold, the protection function is executed, thereby verifying the protection function of the microcomputer control system.

[0033] Preferably, the power input terminal of the controller is connected to the locomotive's onboard power supply via a connector.

[0034] Preferably, the analog signal generator further includes a power switch connected to the controller. More preferably, the power switch is located on the front of the enclosure.

[0035] Preferably, the controller and the display screen are connected via an RS485 network to achieve data interaction.

[0036] Preferably, the connector's plug end is configured with a reserved wire, which can quickly realize the wiring for power supply to the device and signal input to the locomotive's microcomputer control system.

[0037] Preferably, several heat dissipation holes are provided at the rear of the enclosure to facilitate heat dissipation of the internal electrical components.

[0038] Preferably, a handle is provided on the top of the housing to facilitate the movement of the analog signal generator.

[0039] In summary, the analog signal generator of this embodiment has the following characteristics:

[0040] 1) This analog signal generator can replace locomotive sensors and send analog signals to the locomotive microcomputer control system to accurately control parameters such as locomotive pressure, temperature, current, and voltage. It can also quickly verify the correctness of the protection function of the locomotive microcomputer control system.

[0041] 2) This analog signal generator can replace the original test process, bringing many significant advantages: significantly reducing fuel consumption and carbon emissions; significantly improving work efficiency and reducing labor intensity; effectively reducing material consumption costs; and avoiding prolonged exposure of debugging personnel to noise and high temperature environments, reducing the harmful effects on their health.

[0042] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A simulation signal generating device for routine test of a diesel locomotive for urban rail transit, characterized in that, It includes a controller, a display screen, a connector, and a housing; the controller is located inside the housing, with its signal input end connected to the display screen and its signal output end connected to the locomotive microcomputer control system via a connector; the display screen is located on the front of the housing, and the connector is located on the side of the housing.

2. The analog signal generating device for routine test of a diesel locomotive for urban rail transit according to claim 1, characterized in that, The power input terminal of the controller is connected to the locomotive's onboard power supply via a connector.

3. The analog signal generator for routine test of a diesel locomotive for urban rail transit according to claim 2, characterized in that, It also includes a power switch, which is connected to the controller.

4. The analog signal generating device for routine test of a diesel locomotive for urban rail transit according to claim 3, characterized in that, The power switch is located on the front of the enclosure.

5. The analog signal generating device for routine test of a diesel locomotive for urban rail transit according to claim 1, characterized in that, The controller and the display screen are connected via an RS485 network.

6. The analog signal generating device for routine test of a diesel locomotive for urban rail transit according to claim 1, characterized in that, The connector's plug end is configured to have a reserved wire.

7. The analog signal generating device for routine test of a diesel locomotive for urban rail transit according to claim 1, characterized in that, Several heat dissipation holes are provided at the rear of the enclosure.

8. The analog signal generating device for routine test of a diesel locomotive for urban rail transit according to claim 1, characterized in that, A handle is provided on the top of the box.

9. The simulation signal generating device for routine test of urban rail internal combustion locomotive according to any one of claims 1-8, characterized in that, The controller is configured to output a corresponding analog signal based on the analog signal parameter settings input from the display screen.

10. The analog signal generating device for routine test of a diesel locomotive for urban rail transit according to claim 9, characterized in that, The analog signal parameter settings include the analog signal output channel, signal type, and magnitude.

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