Train status display device for urban rail transit vehicle

Abstract

The present disclosure relates to a train state display device for urban rail transit vehicles. An integrated PCB circuit board is provided with multiple groups of LED indicator lights and a buzzer on the front side and a voltage stabilizing circuit and control elements on the back side; an aluminum alloy frame is fixed to the driver's console through four corner countersunk holes; a light-transmitting panel covers the outside of the frame and is provided with 20x20mm graphical icons corresponding to the LEDs on the surface; an anti-vibration connector CN1 is used to bolt the vehicle side cable, and the test light button is connected to the PCB through a spring-loaded connector CN2. 1) Circuit integration design: convert 24V to 12V to drive the LED group through the LM317 chip, and drive the buzzer through the LM7805 chip and the NE555 square wave generator; 2) Intelligent interaction logic: layout icons according to safety levels, and trigger the sound and light self-check of the whole device through the test light button; 3) Anti-vibration structure: connector bolt fixation + spring-loaded anti-loose design. The present disclosure integrates 11 indicator lights + buzzer in a space of 0.018 square meters, graphical display reduces the misjudgment rate, one-key maintenance efficiency is improved, and is suitable for subway / light rail / suspended rail and other vehicle models.

Description

Technical Field

[0001] This invention relates to human-machine interaction equipment for rail transit vehicles, and more specifically to a train status display device for urban rail transit vehicles. Background Technology

[0002] In the operation of urban rail transit vehicles, accurately and promptly displaying various train statuses and information to operators and maintenance personnel has become a key issue in ensuring the safe and efficient operation of trains. Currently, traditional train status display methods have many shortcomings, still relying on single indicator lights and buzzers as a single source of information. If the number of signals to be displayed increases, using an indicator light for each signal would excessively waste space on the control panel. Furthermore, since the indicator lights used on locomotives and urban rail vehicles generally have the same shape, it is impossible to intuitively judge the current vehicle status when the indicator light is lit. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a train status display device for urban rail transit vehicles. This device can simultaneously display multiple train status information, including operating status, equipment status, and safety status, conveying the train's current logical conditions. When these conditions are met, the display device can automatically provide audio and visual alerts, facilitating train drivers and maintenance personnel to quickly understand the train's status. It also significantly saves space occupied by components on the control panel, integrating various prompts into a single device for easier future inspection and maintenance.

[0004] The technical solution adopted in this invention is a train status display device for urban rail transit vehicles, comprising: The integrated circuit board (PCB) has multiple LED indicator lights and a buzzer on the front and a voltage regulator circuit, connectors and control components on the back. An aluminum alloy frame is used to fix the PCB and button assembly. Countersunk holes are provided at the four corners of the frame for mounting to the console. The test light button is connected to the PCB via connector CN2. Pressing it activates all LEDs and the buzzer. A light-transmitting panel covers the outside of the frame, and its surface is decorated with graphic icons corresponding to the LEDs; The vibration-damping connector CN1 is used for vehicle-side signal access and is secured with bolts to prevent loosening.

[0005] Preferably, the voltage regulator circuit includes: LED power supply module: Uses LM317 chip to convert 24V input to 12V output, with each channel connected in series with a 62Ω current-limiting resistor and a 1N4148 switching diode; Buzzer driver module: The LM7805 chip converts 24V to 5V, and the duty cycle is adjusted by the NE555 square wave generator to drive the passive buzzer.

[0006] Preferably, the graphical icons are arranged according to safety level: driving safety signals are close to the driver's side, bypass functions are indicated in yellow, and alarm status is indicated in red.

[0007] Preferably, the integrated circuit board (PCB) is a double-sided board, with LED lights and a buzzer arranged on the front side and a voltage regulator chip, connector and square wave generator arranged on the back side. The via diameter is ≥12mil and the power line width is ≥30mil.

[0008] The beneficial effects of the present invention are: (1) The device integrates the signals to be displayed. Taking the suspended rail train as an example, it integrates 11 indicator lights, 1 buzzer and 1 button switch, and occupies an area of ​​only 0.018 square meters (450×40).

[0009] (2) Traditional indicator lights are similar to buttons in both appearance and installation. Most buttons used in rail transit vehicles currently have built-in indicator lights, so it is not possible to visually lock onto the required indicator signal immediately. Furthermore, traditional indicator lights are inconsistent in space and logic. This device can prevent the driver from shifting their attention and judgment between indicator lights in different locations. (3) This device is equipped with a test light button. When the driver or maintenance personnel inspect the vehicle, they do not need to meet the lighting conditions of the corresponding indicator lights in sequence. They can directly light up all indicator lights and buzzers by pressing the test light button. (4) This device can be used in urban rail transit vehicles such as subways, light rails, monorails, and overhead suspended rail trains. Attached Figure Description

[0010] Figure 1 This is an indicator light circuit.

[0011] Figure 2 This is a buzzer circuit.

[0012] Figure 3 This is the schematic diagram of the state board.

[0013] Figure 4 This is a reverse view of the PCB board.

[0014] Figure 5 This is the front of the PCB board.

[0015] Figure 6 This is an assembly rendering.

[0016] Figure 7 This is a screenshot of the panel.

[0017] Figure 8 This is a picture showing the actual installation effect on the vehicle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] To simultaneously display multiple train status information, including operating status, equipment status, and safety status, and to convey the train's current logical conditions, the display device can automatically provide audio and visual alerts when the corresponding conditions are met. This allows train drivers and maintenance personnel to quickly understand the train's status and significantly saves space occupied by components on the control panel. By integrating various prompts into one device, it facilitates future inspection and maintenance.

[0020] This invention integrates indicator lights and buzzers using a PCB circuit board. Through hardware selection, LED indicator lights of appropriate colors can be chosen according to actual needs. When external signal conditions are met, the corresponding LED indicator lights up to provide a notification. A "test light" button is also provided; pressing the button activates all LED indicator lights and buzzers, facilitating maintenance personnel inspection. The status display device is enclosed in an aluminum alloy frame for securing the PCB circuit board and button assembly. The aluminum alloy frame has four countersunk holes for fixed installation with the vehicle's control panel.

[0021] (1) Circuit design The LED circuit uses LM317 voltage regulator chips as voltage conversion components. Each LM317 converts the 24V power supply from the vehicle side to 12V to power each group of LED indicators. Each circuit is equipped with a 1N4148 switching diode to achieve unidirectional conductivity.

[0022] Table 1. Electrical parameters of the LED circuit:

[0023] The buzzer circuit uses the LM7805 voltage regulator chip as a voltage conversion element. The buzzer circuit converts the 24V voltage from the vehicle side to 5V to power the buzzer circuit. When the external conditions are met, the voltage is converted to 5V by the LM7805 and input to the VCC and RST pins of the NE555 chip. By adjusting the potentiometer RP1, the duty cycle of the NE555 is adjusted to output a square wave to power the passive buzzer, enabling the buzzer to oscillate and sound.

[0024] Table 2, Electrical parameters of the buzzer circuit:

[0025] The wiring between the status display device's circuit board and the vehicle side, as well as the connection between the test light button and the circuit board, is achieved through connector CN1. The vehicle-side connector has bolt fixing holes to prevent wires from coming loose due to vehicle vibration. A spring-loaded connector CN2 is used between the test light button and the circuit board. One end of the wire is crimped to the GT pipe post terminal and inserted into the spring-loaded connector, while the other end is crimped to the spring-loaded terminal and inserted into the button's terminal block. This design prevents open circuits or poor contact due to vibration.

[0026] Based on actual needs, a "test light" button was set up. The power supply for the test light button is from the vehicle side. The vehicle side power enters the circuit board through connector CN1, and then enters one end of the button through connector CN2. When the button is pressed, its contacts close and the other end outputs voltage, which powers all the LED lights and buzzers through the Schottky diode 1N5822, thus enabling all LED lights and buzzers to be lit and realizing the inspection and maintenance functions.

[0027] Table 3, Connector Parameters:

[0028] According to the electrical schematic, there are 13 signal interfaces that need to be connected to the outside. One end of the connector needs to be a direct-plug soldering connector female. Since the device is used in rail transit vehicles, a connector with some vibration resistance needs to be selected. The connector has a fixing ear. The female connector is pre-soldered on the PCB board, and the male connector is fastened to it with screws for fixing ears, which can effectively prevent displacement or loosening during vibration.

[0029] According to the state board schematic ( Figure 3 Draw the corresponding PCB circuit board. The layout and package of each component are as follows. The PCB is a double-sided circuit board. The front side of the circuit board houses the LED indicator lights and buzzers, while the back side houses the voltage regulator chips, diodes, connectors, and other components. Double-layer board wiring is used, with vias connecting the components on both sides. M3 mounting holes are provided around the perimeter of the PCB circuit board for connection and fixation to the panel. A through hole is provided on one side for mounting buttons to prevent interference between the button's tail and the PCB board.

[0030] PCB Design Rules: Table 4 shows the safe clearances during the PCB design process.

[0031] The minimum wire width is 10 mil, and the power wire width is 30 mil; the minimum outer diameter of a via is 24 mil, and the minimum inner diameter of a via is 12 mil. Note: 1: CN1 connector; 2: CN2 connector; 3: Square wave generator; 4: LM7805 voltage regulator; 5: LM317 voltage regulator; 6: Switching diode.

[0032] A PVC translucent plastic sheet is attached to the outside of the aluminum alloy frame. When an LED indicator is lit, its icon will transmit the light of the LED beads, thus achieving the indication effect.

[0033] Each icon on this device measures 20×20mm, uses a PVC translucent film with a light transmittance of 85%, and has a frosted surface.

[0034] The names, graphic shapes, and lighting effects of each vehicle status on the suspension vehicle can be seen in the panel effect diagram. Figure 7 Actual loading effect as follows Figure 8 .

[0035] This invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A train status display device for urban rail transit vehicles, characterized in that, include: The integrated circuit board (PCB) has multiple LED indicator lights and a buzzer on the front and a voltage regulator circuit, connectors and control components on the back. An aluminum alloy frame is used to fix the PCB and button assembly. Countersunk holes are provided at the four corners of the frame for mounting to the console. The test light button is connected to the PCB via connector CN2. Pressing it activates all LEDs and the buzzer. A light-transmitting panel covers the outside of the frame, and its surface is decorated with graphic icons corresponding to the LEDs; The vibration-damping connector CN1 is used for vehicle-side signal access and is secured with bolts to prevent loosening.

2. The apparatus according to claim 1, characterized in that, The voltage regulator circuit includes: LED power supply module: Uses LM317 chip to convert 24V input to 12V output, with each channel connected in series with a 62Ω current-limiting resistor and a 1N4148 switching diode; Buzzer driver module: The LM7805 chip converts 24V to 5V, and the duty cycle is adjusted by the NE555 square wave generator to drive the passive buzzer.

3. The apparatus according to claim 1, characterized in that, The graphical icons are arranged according to safety level: driving safety signals are close to the driver's side, bypass functions are indicated in yellow, and alarm status is indicated in red.

4. The apparatus according to claim 1, characterized in that, The integrated circuit board (PCB) is a double-sided board. The front side is equipped with LED lights and a buzzer, while the back side is equipped with a voltage regulator chip, connectors, and a square wave generator. The via diameter is ≥12mil, and the power line width is ≥30mil.

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