A hand-held locomotive speed signal path testing device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZIYANG CRRC ELECTRIC LOCOMOTIVE CO LTD
- Filing Date
- 2026-06-02
- Publication Date
- 2026-07-07
Smart Images
Figure CN224471693U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rail transit maintenance equipment technology, and in particular to a handheld locomotive speed signal channel testing device. Background Technology
[0002] The safe operation of railway locomotives relies on three electrical systems: radio system, signaling system, and monitoring system. Among them, the train operation monitoring system is the core device for preventing accidents such as speeding and overstepping signals, and ensuring train operation safety. Like an intelligent navigation system for the locomotive, it can display track data in real time, monitor operating status, and automatically apply emergency braking in dangerous situations such as speeding.
[0003] With technological advancements, monitoring systems have evolved from the LKJ93 series to more automated and intelligent models such as the LKJ2000 and LKJ15. Verifying the speed detection function of the monitoring system is crucial during the commissioning phase after locomotive assembly. The system consists of a speed detection board installed inside the locomotive, connecting cables, an aviation connector (detection end), photoelectric speed sensors installed on the axles, connecting cables, and an aviation plug (output end). During the manufacturing process of circuit soldering and cable crimping, it is difficult to completely avoid process defects such as incomplete soldering, incorrect connections, and missing connections. These defects directly lead to the failure of the speed detection function, posing a serious safety hazard.
[0004] The traditional testing method involves removing the photoelectric sensor while the wheel is stationary and manually rotating it with a crank handle to simulate a speed signal. However, this method has inherent drawbacks such as low efficiency, unstable signal that cannot maintain a constant speed value, and poor test accuracy. Utility Model Content
[0005] To address the aforementioned issues, this invention provides a handheld locomotive speed signal channel testing device that can quickly diagnose the line status before testing and output a stable and accurate speed signal during testing, thus solving problems such as cumbersome testing processes, unstable signals, poor equipment compatibility, and the inability to diagnose line status.
[0006] This utility model provides a handheld locomotive speed signal channel testing device, the specific technical solution of which is as follows:
[0007] The device includes a main body and a connecting unit;
[0008] The main body includes a housing and a power module, a touch screen, a control module, a signal isolation output module, a channel line detection module, and a status indication module integrated on a circuit board, with the circuit board placed inside the housing;
[0009] The connection unit includes a main cable, one end of which is sealed to the outer casing via a waterproof fastening ring, and the other end is fixed with a connection plug.
[0010] Furthermore, the power module includes a rechargeable lithium-ion battery pack, a Type-C charging interface, and a power switch;
[0011] The housing is provided with a charging port and a switch through hole. The connection end of the Type-C charging interface is located at the charging port, and the power switch is located at the switch through hole.
[0012] Furthermore, the power module has a detachable sliding battery compartment between the rechargeable lithium-ion battery pack and the circuit board.
[0013] Furthermore, the signal isolation output module includes a single PWM input terminal and four optocoupler isolation output terminals. The single PWM input terminal is connected to a single I / O port of the control module, and the four optocoupler isolation output terminals synchronously output 15V square wave pulses.
[0014] Furthermore, the channel line detection module includes four detection sub-circuits, which are respectively connected in series between the corresponding optocoupler isolation output terminal and the corresponding core wire of the connection unit. They are used to detect the polarity and circuit continuity status of the 15V power supply introduced by the locomotive monitoring system through the connection unit before the control module drives the optocoupler to output pulses.
[0015] Furthermore, the status indication module includes indicator lights equal to the number of detection loops, which are connected in parallel with the corresponding detection sub-circuits of the channel line detection module to indicate the pre-detection status of each channel.
[0016] Furthermore, the connector is a 14-pin round aviation connector.
[0017] Furthermore, the outer shell is also provided with a lanyard hole for connecting a fall-proof wristband, which meets the fall prevention requirements for high-altitude operations on railway sites.
[0018] Furthermore, the control module uses an STC8H series microcontroller to receive touchscreen commands and generate pulse signals of corresponding frequencies.
[0019] Furthermore, the connection unit also includes an interface converter, one end of which is provided with a connection socket adapted to the connection plug, and the other end is provided with a 24-pin square aviation plug.
[0020] The beneficial effects of this utility model are as follows:
[0021] This invention features a handheld, integrated design. A built-in control module generates pulse signals of corresponding frequencies, which are then synchronously output as stable square waves via a signal isolation output module. The signal isolation output module employs a single-channel PWM input and four-channel optocoupler isolation output architecture to achieve electrical isolation between the microcontroller's 5V circuit and the locomotive's 15V circuit. The four synchronous outputs ensure phase consistency of the multi-channel speed signals. An integrated channel line detection module detects the polarity and continuity of the locomotive's 15V power supply before outputting the pulses, and displays this information in real-time via a status indicator module, enabling visualized wiring and allowing for line status assessment without a multimeter. Furthermore, a native 14-pin circular aviation connector, coupled with an independent interface converter, enables rapid diagnosis of the line status before testing. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the device structure.
[0023] Figure 2 This is a schematic diagram of the connection architecture.
[0024] Figure labeling: 1-House, 2-Touch screen, 3-Main cable, 4-Connector plug, 5-Interface converter. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. The components of the embodiments of the present utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0026] In the description of the embodiments of this utility model, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship commonly used when the utility model product is in use. These are only for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0027] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] Example 1
[0029] Embodiment 1 of this utility model discloses a handheld locomotive speed signal channel testing device, such as... Figure 1 As shown, it includes a main body and connecting units;
[0030] The main body includes a shell, and a power module, a touch screen, a control module, a signal isolation output module, a channel line detection module and a status indicator module integrated on a circuit board. The circuit board is placed in the shell, which is an integrally molded engineering plastic box that is larger at the top and smaller at the bottom.
[0031] The control module uses an STC8H series microcontroller and a pluggable memory structure. It is used to receive touch screen commands and generate pulse signals of corresponding frequencies. The execution program is the existing conventional program logic implemented through the microcontroller's I / O ports.
[0032] The connection unit includes a main cable, one end of which is sealed to the top of the housing via a waterproof fastening ring, and the other end is fixed with a connection plug;
[0033] Specifically, the connector is a 14-pin round aviation connector.
[0034] In a preferred embodiment, the power module includes a rechargeable lithium-ion battery pack, a Type-C charging interface, and a power switch;
[0035] The housing is provided with a charging port and a switch through hole. The connection end of the Type-C charging interface is located at the charging port, and the power switch is located at the switch through hole.
[0036] In a preferred embodiment, the power module has a detachable sliding battery compartment between the rechargeable lithium-ion battery pack and the circuit board.
[0037] The front of the housing is also provided with an interactive through hole for setting the touch screen. The touch screen is a 3.2-inch color serial port touch screen. Users can set the speed value to be simulated (1-160km / h) and select the transmission mode through the touch screen, and view the device status and alarm information in real time.
[0038] In a preferred embodiment, the signal isolation output module includes a single PWM input terminal and four optocoupler isolation output terminals. The single PWM input terminal is connected to a single I / O port of the control module, and the four optocoupler isolation output terminals synchronously output 15V square wave pulses.
[0039] The signal isolation output module has a self-resetting fuse and a TVS diode connected in series at the output terminal of each optocoupler to form dual protection against overcurrent and overvoltage.
[0040] In this embodiment, the signal isolation output module adopts a single-channel PWM input and four-channel optocoupler isolation output architecture to achieve electrical isolation between the microcontroller's 5V circuit and the locomotive's 15V circuit.
[0041] Four-channel synchronous output ensures phase consistency of multi-channel speed signals;
[0042] Each circuit is connected in series with a resettable fuse and a TVS diode, forming dual protection against overcurrent and overvoltage, thus improving equipment safety.
[0043] The channel line detection module includes four detection sub-circuits, which are respectively connected in series between the corresponding optocoupler isolation output terminal and the corresponding core wire of the connection unit. They are used to detect the polarity and circuit continuity status of the 15V power supply introduced by the locomotive monitoring system through the connection unit before the control module drives the optocoupler to output pulses.
[0044] In this embodiment, four detection sub-circuits are connected in series between the corresponding optocoupler output terminal and the connection unit. The LED indicator lights up only when the power polarity of the corresponding channel is correct and the connection is normal, realizing the visualization of the wiring. The operator can intuitively judge the line status without a multimeter.
[0045] The status indication module includes indicator lights equal to the number of detection loops, which are connected in parallel with the corresponding detection sub-circuits of the channel line detection module to indicate the pre-detection status of each channel. The lights are illuminated only when the polarity of the corresponding channel is correct and the loop is conducting.
[0046] The housing is provided with lamp through holes that are the same number and compatible with the number of indicator lights, and each indicator light is located at the lamp through hole.
[0047] The outer shell is also equipped with a lanyard hole for connecting a fall-proof wristband, which meets the fall prevention requirements for high-altitude operations on railway sites.
[0048] In a preferred embodiment, the connection unit further includes an interface converter. One end of the interface converter is provided with a connection socket adapted to the connection plug, and the other end is provided with a 24-pin square aviation plug. The internal circuitry is adapted to the speed channel definitions of the LKJ2000 and LKJ15 systems.
[0049] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A handheld locomotive speed signal channel testing device, characterized in that, Includes the main body and connecting units; The main body includes a housing and a power module, a touch screen, a control module, a signal isolation output module, a channel line detection module, and a status indication module integrated on a circuit board, with the circuit board placed inside the housing; The connection unit includes a main cable, one end of which is sealed to the outer casing via a waterproof fastening ring, and the other end is fixed with a connection plug.
2. The handheld locomotive speed signal channel testing device according to claim 1, characterized in that, The power module includes a rechargeable lithium-ion battery pack, a Type-C charging interface, and a power switch. The housing is provided with a charging port and a switch through hole. The connection end of the Type-C charging interface is located at the charging port, and the power switch is located at the switch through hole.
3. The handheld locomotive speed signal channel testing device according to claim 2, characterized in that, The power module has a detachable sliding battery compartment between the rechargeable lithium-ion battery pack and the circuit board.
4. The handheld locomotive speed signal channel testing device according to claim 1, characterized in that, The signal isolation output module includes a single PWM input terminal and four optocoupler isolation output terminals. The single PWM input terminal is connected to a single I / O port of the control module, and the four optocoupler isolation output terminals synchronously output 15V square wave pulses.
5. The handheld locomotive speed signal channel testing device according to claim 4, characterized in that, The channel line detection module includes four detection sub-circuits, which are respectively connected in series between the corresponding optocoupler isolation output terminal and the corresponding core wire of the connection unit.
6. The handheld locomotive speed signal channel testing device according to claim 5, characterized in that, The status indication module includes indicator lights, the same number as the number of detection loops, which are connected in parallel with the corresponding detection sub-circuits of the channel line detection module.
7. The handheld locomotive speed signal channel testing device according to claim 1, characterized in that, The connector is a 14-pin round aviation connector.
8. The handheld locomotive speed signal channel testing device according to claim 1, characterized in that, The outer casing is also provided with a lanyard hole.
9. The handheld locomotive speed signal channel testing device according to claim 1, characterized in that, The control module uses an STC8H series microcontroller.
10. The handheld locomotive speed signal channel testing device according to any one of claims 1-7, characterized in that, The connection unit also includes an interface converter, one end of which is provided with a connection socket adapted to the connection plug, and the other end is provided with a 24-pin square aviation plug.