LKJ external interface signal measurement simulation device

Abstract

The utility model discloses an LKJ external interface signal measurement simulation device, belongs to the technical field of signal measurement simulation, and solves the technical problem that the current LKJ equipment external interface signal is lack of special measurement and simulation generation equipment. The device comprises a tablet computer, a DC24V power supply interface, a DC24V to DC15V module, a current measurement module, a voltage acquisition module, a voltage division module, an analog output module, a voltage amplification module, an input connector and an output connector, and the tablet computer is in signal connection with the voltage acquisition module and the analog output module. The DC24V power supply interface is electrically connected with the DC24V to DC15V module, the current measurement module, the analog output module and the voltage amplification module, the voltage acquisition module is electrically connected with the current measurement module, the voltage division module, the input connector and the output connector, the input connector is electrically connected with the current measurement module and the voltage division module, and the output connector is electrically connected with the voltage division module and the voltage amplification module.

Description

Technical Field

[0001] The utility model relates to the technical field of signal measurement simulation, and more specifically, to an LKJ external interface signal measurement simulation device. Background Art

[0002] The LKJ equipment is the train operation monitoring device, referred to as LKJ, which is a component of my country's train operation control system. It can be used to prevent trains from overrunning signals and speeding accidents, and assist locomotive drivers to improve their operating capabilities. It is one of the important driving equipment.

[0003] At present, there are the following shortcomings in measuring the LKJ external interface signal: 1. The current LKJ device external interface signal lacks dedicated measurement and simulation generation equipment, and the existing equipment cannot achieve accurate measurement and signal simulation; 2. The current measurement method is backward, and the judgment of related faults is not accurate enough; 3. The current measurement efficiency is low, and it is impossible to complete rapid measurement and then diagnose faults; 4. The current measurement uses a multimeter, and the waveform of the signal cannot be observed, and the use of an oscilloscope or other equipment cannot be used in the narrow space of the train. Utility Model Content

[0004] The technical problem to be solved by the utility model is aimed at the above-mentioned deficiencies in the prior art. The purpose of the utility model is to provide a LKJ external interface signal measurement simulation device.

[0005] The technical solution of the utility model is: an LKJ external interface signal measurement simulation device, comprising a tablet computer, a DC24V power supply interface, a DC24V to DC15V module, a current measurement module, a voltage acquisition module, a voltage divider module, an analog output module, a voltage amplification module, an input connector, and an output connector, wherein the tablet computer signal is connected to the voltage acquisition module and the analog output module, the DC24V power supply interface is electrically connected to the DC24V to DC15V module, the current measurement module, the analog output module, and the voltage amplification module, the voltage acquisition module is electrically connected to the current measurement module, the voltage divider module, the input connector, and the output connector, the input connector is electrically connected to the current measurement module and the voltage divider module, and the output connector is electrically connected to the voltage divider module and the voltage amplification module.

[0006] As a further improvement, it also includes a tablet charging interface electrically connected to the tablet computer and a data transmission interface signal-connected to the tablet computer.

[0007] Furthermore, the data transmission interface is a USB2.0 or USB3.0 interface, and the tablet computer is connected to the voltage acquisition module and the analog output module via a USB2.0 or USB3.0 signal line.

[0008] Furthermore, it also includes a DC24V to DC5V module electrically connected to the DC24V power supply interface.

[0009] Furthermore, the model of the current measurement module is INA296x, and the model of the voltage amplification module is TL084.

[0010] Furthermore, it also includes a chassis, in which the tablet computer, DC24V power supply interface, DC24V to DC15V module, current measurement module, voltage acquisition module, voltage divider module, analog output module, voltage amplification module, input connector, and output connector are installed.

[0011] Furthermore, a rotatably connected box cover is provided on the top of the chassis, and the box cover is fastened to the chassis by buckles, and a handle is provided on one side of the chassis.

[0012] Furthermore, the chassis is provided with a lower base plate, a flat panel support plate, and an upper panel from bottom to top, respectively; the DC24V power supply interface, DC24V to DC15V module, current measurement module, voltage acquisition module, voltage divider module, analog output module, and voltage amplification module are installed on the lower base plate; the tablet computer is installed on the flat panel support plate; the input connector and output connector are installed on the upper panel; and the upper panel is provided with a flat panel observation window aligned with the tablet computer.

[0013] Furthermore, the lower base plate, the tablet support plate and the upper panel are all made of aluminum plates, and a buffer layer is provided on the surface of the tablet support plate on which the tablet computer is mounted.

[0014] Furthermore, a document bag is provided on the inner top wall of the box cover.

[0015] Beneficial Effects

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The utility model is connected to the external interface of the LKJ device through an input connector and an output connector, and the current signal and the voltage signal output by the LKJ device can be read through a tablet computer, a current measurement module, a voltage acquisition module, and a voltage divider module, which is convenient for analysis. The tablet computer analog output module and the voltage amplification module can also output square wave signals and sine signals to the LKJ device, and the LKJ external interface signal can be effectively simulated and measured, and the measurement accuracy can be effectively guaranteed. The operation is simple and convenient, and the utility model has a high degree of integration and can be conveniently used in narrow spaces on trains. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the circuit principle diagram of the utility model;

[0019] Figure 2It is a schematic diagram of the top view of the chassis in the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the chassis in the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the lower bottom plate of the utility model;

[0022] Figure 5 This is a structural schematic diagram of a flat plate support plate in the utility model;

[0023] Figure 6 It is a structural schematic diagram of the upper panel in the utility model;

[0024] Figure 7 This is a printed film diagram of the upper panel in the utility model;

[0025] Figure 8 This is a schematic diagram of the structure of the document bag in the utility model;

[0026] Fig. 9 This is a circuit diagram of the current measurement module in the utility model;

[0027] Fig.10 This is a circuit diagram of the voltage amplification module in the utility model;

[0028] Fig.11 This is a circuit diagram of the voltage divider module in the utility model.

[0029] Among them: 1-tablet computer, 2-DC24V power supply interface, 3-DC24V to DC15V module, 4-current measurement module, 5-voltage acquisition module, 6-voltage divider module, 7-analog output module, 8-voltage amplification module, 9-input connector, 10-output connector, 11-tablet charging interface, 12-data transmission interface, 13-DC24V to DC5V module, 14-chassis, 15-case cover, 16-buckle, 17-handle, 18-lower bottom plate, 19-tablet tray, 20-upper panel, 21-tablet observation window, 22-file bag, 23-PCB board. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0031] See also Figures 1 to 11, a LKJ external interface signal measurement simulation device, including a tablet computer 1, a DC24V power supply interface 2, a DC24V to DC15V module 3, a current measurement module 4, a voltage acquisition module 5, a voltage divider module 6, an analog output module 7, a voltage amplification module 8, an input connector 9, and an output connector 10. The number of DC24V to DC15V modules 3 is 2. The tablet computer 1 signal is connected to the voltage acquisition module 5 and the analog output module 7. The DC24V power supply interface 2 is electrically connected to the DC24V to DC15V module 3, the current measurement module 4, the analog output module 7, and the voltage amplification module 8. The voltage acquisition module 5 is electrically connected to the current measurement module 4, the voltage divider module 6, the input connector 9, and the output connector 10. The input connector 9 is electrically connected to the current measurement module 4 and the voltage divider module 6. The output connector 10 is electrically connected to the voltage divider module 6 and the voltage amplification module 8. The device also includes a tablet charging interface 11 electrically connected to the tablet computer 1, and a data transmission interface 12 signal connected to the tablet computer 1.

[0032] When performing signal measurement, the tablet computer 1 sends a collection instruction to the voltage collection module 5, the voltage divider module 6, the analog output module 7, and the voltage amplifier module 8. The signals generated by the train speed, diesel revolutions, and pipe pressure sensors are processed by the DC24V to DC15V module 3 circuit and enter the DC24V power supply interface 2 to electrically connect the DC24V to DC15V module 3, the current measurement module 4, the analog output module 7, and the voltage amplifier module 8 to complete the AD conversion and send it to the tablet computer 1 through the USB bus. The tablet computer 1 completes the digital filtering and shaping of the signal and processes and calculates the signal according to the processing mechanism of the LKJ host, presenting the calculation results and the original waveform of the signal to the operator. When performing signal output, the tablet computer 1 sends the output instruction and signal data to the analog output card input connector 9 to complete the AD conversion, and then amplifies it through the voltage amplifier module 8 and outputs it to the LKJ host.

[0033] Preferably, the data transmission interface 12 is a USB2.0 or USB3.0 interface, and the tablet computer 1 is connected to the voltage acquisition module 5 and the analog output module 7 via a USB2.0 or USB3.0 signal line.

[0034] The device further comprises a DC24V to DC5V module 13 electrically connected to the DC24V power supply interface 2, and the number of the DC24V to DC5V modules 13 is 2 for backup.

[0035] Preferably, the model of the current measurement module 4 is INA296x, such as Fig. 9 As shown, the model of the voltage amplifier module 8 is TL084. Fig.10 The circuit of the voltage divider module 6 is as shown in Fig.11As shown, voltage division is mainly achieved by connecting two resistors in series. For example, resistor R1 is connected in series with R5 and then connected to both ends of the power supply (i.e., IN1 and GND1). One end of the resistor R1 connected to R5 is used as the output port OUT1 of the voltage division. Fig.11 The figure shows an 8-way voltage divider.

[0036] The maximum input range and output range of the voltage acquisition module 5 are both ±10V, which cannot meet the measurement and simulation requirements of the LKJ external interface signal, so the input and output signals need to be conditioned. The conditioning circuit is mainly divided into two parts. One part is the voltage amplification module 8 amplification circuit, which is implemented by an operational amplifier. The voltage amplification circuit has four channels, which can amplify the three speed signals and one diesel engine speed signal analog output by the voltage acquisition module 5 at a ratio of 1:2. The other part is the current measurement module 4, which is implemented by the principle of resistance voltage division. The voltage attenuation circuit will attenuate the higher voltage diesel engine speed and speed signals at a ratio of 5:1 to meet the input range of the data acquisition card. The circuit schematic is shown in Figure 8-11 shown.

[0037] The analog output module 7 and the voltage acquisition module 5 adopt existing mature products. The analog output module 7 is used to output 4 waveforms, including 3 square waves and 1 sine wave, which are amplified by the voltage amplifier module 8 and output to the LKJ device. The voltage acquisition module 5 reads the 3 square wave and 1 sine wave signals output by the LKJ device through the voltage divider module 6. The voltage acquisition module 5 reads the 2 current signals output by the LKJ device through the current measurement module 4. The DC24V power supply interface 2 supplies power to the DC24V to DC15V module 3, the DC24V to DC5V module 13, the current measurement module 4, the analog output module 7, and the voltage amplifier module 8 respectively.

[0038] The device also includes a chassis 14, a tablet computer 1, a DC24V power supply interface 2, a DC24V to DC15V module 3, a current measurement module 4, a voltage acquisition module 5, a voltage divider module 6, an analog output module 7, a voltage amplification module 8, an input connector 9, and an output connector 10 are installed in the chassis 14.

[0039] A rotatably connected case cover 15 is provided on the top of the case 14 , and the case cover 15 is fastened to the case 14 via a buckle 16 . A handle 17 is provided on one side of the case 14 , so that the device can be conveniently carried.

[0040] Specifically, the chassis 14 is provided with a lower base plate 18, a flat plate support plate 19, and an upper panel 20 from bottom to top. The DC24V power supply interface 2, the DC24V to DC15V module 3, the current measurement module 4, the voltage acquisition module 5, the voltage divider module 6, the analog output module 7, and the voltage amplification module 8 are integrated into the PCB board 23 and then installed on the lower base plate 18. The tablet computer 1 is installed on the flat plate support plate 19, and the input connector 9 and the output connector 10 are installed on the upper panel 20. The upper panel 20 is provided with a flat plate observation window 21 aligned with the tablet computer 1.

[0041] In this embodiment, the lower bottom plate 18, the flat plate support plate 19, and the upper panel 20 are all made of aluminum plates, and a buffer layer is provided on the surface of the flat plate support plate 19 on which the tablet computer 1 is mounted. Preferably, the thickness of the lower bottom plate 18, the flat plate support plate 19, and the upper panel 20 is 2 mm, and the buffer layer is a 5 mm thick EVA material.

[0042] Furthermore, a document bag 22 is provided on the inner top wall of the box cover 15 for placing documents used in the measurement process.

[0043] The device has three functions: LKJ equipment sensor signal generation, acquisition, and analysis and processing. When acquiring signals, the external sensor of the LKJ equipment is connected to the input aviation plug of the device. The relevant signal is modulated by the conditioning module of the device and becomes a standard signal for acquisition. It is collected by the data acquisition card and transmitted to the host computer, where the signal is restored and analyzed and finally presented to the operator. When the signal occurs, the output aviation plug of the device is connected to the LKJ host. The operator sets the output parameters in the host computer and generates the output signal according to the output parameters. The signal is sent to the data acquisition card, modulated into a sensor signal by the conditioning module, and finally sent to the LKJ host for analysis.

[0044] The device is a portable device that can be used directly on the train. It changes the current situation where the LKJ host board needs to be taken back to the maintenance base for testing to confirm the fault. Its signal acquisition and signal generation functions can help operators quickly check whether the fault is located at the sensor end or at the LKJ host end, which can effectively reduce the time for troubleshooting.

[0045] The above are only preferred implementations of the utility model. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the utility model, which will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A LKJ external interface signal measurement simulation device, characterized in that: The tablet computer (1) comprises a DC24V power supply interface (2), a DC24V to DC15V module (3), a current measurement module (4), a voltage acquisition module (5), a voltage divider module (6), an analog output module (7), a voltage amplification module (8), an input connector (9), and an output connector (10); the tablet computer (1) is signal-connected to the voltage acquisition module (5) and the analog output module (7); the DC24V power supply interface (2) is electrically connected to the DC24V to DC15V module (3), the current measurement module (4), the analog output module (7), and the voltage amplification module (8); the voltage acquisition module (5) is electrically connected to the current measurement module (4), the voltage divider module (6), the input connector (9), and the output connector (10); the input connector (9) is electrically connected to the current measurement module (4) and the voltage divider module (6); and the output connector (10) is electrically connected to the voltage divider module (6) and the voltage amplification module (8).

2. The LKJ external interface signal measurement simulation device according to claim 1, characterized in that: It also includes a tablet charging interface (11) electrically connected to the tablet computer (1) and a data transmission interface (12) signal-connected to the tablet computer (1).

3. The LKJ external interface signal measurement simulation device according to claim 2, characterized in that: The data transmission interface (12) is a USB2.0 or USB3.0 interface, and the tablet computer (1) is connected to the voltage acquisition module (5) and the analog output module (7) via a USB2.0 or USB3.0 signal line.

4. The LKJ external interface signal measurement simulation device according to claim 1, characterized in that: It also includes a DC24V to DC5V module (13) electrically connected to the DC24V power supply interface (2).

5. The LKJ external interface signal measurement simulation device according to claim 1, characterized in that: The model of the current measurement module (4) is INA296x, and the model of the voltage amplification module (8) is TL084.

6. A LKJ external interface signal measurement simulation device according to any one of claims 1 to 5, characterized in that: It also comprises a chassis (14), wherein the tablet computer (1), the DC24V power supply interface (2), the DC24V to DC15V module (3), the current measurement module (4), the voltage acquisition module (5), the voltage division module (6), the analog output module (7), the voltage amplification module (8), the input connector (9), and the output connector (10) are installed in the chassis (14).

7. The LKJ external interface signal measurement simulation device according to claim 6, characterized in that: A rotatably connected box cover (15) is provided on the top of the box (14); the box cover (15) is fastened to the box (14) via a buckle (16); and a handle (17) is provided on one side of the box (14).

8. The LKJ external interface signal measurement simulation device according to claim 6, characterized in that: The chassis (14) is provided with a lower base plate (18), a flat plate support plate (19), and an upper panel (20) from bottom to top, respectively; the DC24V power supply interface (2), the DC24V to DC15V module (3), the current measurement module (4), the voltage acquisition module (5), the voltage divider module (6), the analog output module (7), and the voltage amplification module (8) are installed on the lower base plate (18); the tablet computer (1) is installed on the flat plate support plate (19); the input connector (9) and the output connector (10) are installed on the upper panel (20); and the upper panel (20) is provided with a flat plate observation window (21) aligned with the tablet computer (1).

9. The LKJ external interface signal measurement simulation device according to claim 8, characterized in that: The lower base plate (18), the flat panel support plate (19), and the upper panel (20) are all made of aluminum plates, and a buffer layer is provided on the surface of the flat panel support plate (19) on which the tablet computer (1) is mounted.

10. The LKJ external interface signal measurement simulation device according to claim 7, characterized in that: The inner top wall of the box cover (15) is provided with a document bag (22).

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