CN218728696U - Subway system human-computer interaction equipment - Google Patents
Subway system human-computer interaction equipment Download PDFInfo
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- CN218728696U CN218728696U CN202223160016.8U CN202223160016U CN218728696U CN 218728696 U CN218728696 U CN 218728696U CN 202223160016 U CN202223160016 U CN 202223160016U CN 218728696 U CN218728696 U CN 218728696U
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Abstract
A man-machine interaction device of a subway system comprises a core board circuit assembly, a core board circuit assembly and a control circuit assembly, wherein the core board circuit assembly comprises a processor circuit, an EMMC circuit, a DDR4 memory circuit and an integrated coding and decoding circuit; the EMMC circuit carries out flash memory on information of a subway system; the DDR4 memory circuit is used as a memory of the man-machine interaction equipment of the subway system; the integrated coding and decoding circuit is used for carrying out audio decoding and is matched with a loudspeaker to realize sound prompt and warning; the bottom board circuit component comprises a power supply module, a voltage reduction circuit, an audio amplification circuit and an Ethernet transceiving chip circuit; the power module converts the circuit from 24V to 12V, and the voltage reduction circuit converts the voltage from 12V to 5V and from 5V to 3.3V; the audio amplification circuit amplifies audio signals to achieve early warning and alarming of a man-machine interaction system, and the Ethernet transceiving chip circuit is used for obtaining signals of hardware equipment of the subway system. The utility model discloses circuit structure is stable high-efficient more, and the operation safety of subway system is ensured in the high-speed transmission of information.
Description
Technical Field
The utility model relates to a human-computer interaction equipment especially relates to a subway system human-computer interaction equipment.
Background
With the development of cities and the acceleration of life pace of people, subways gradually become common transportation means in people's lives, and the safety of subways not only relates to the national property safety, but also more importantly relates to the life safety of people, so that the safety of subways plays an important role in the development of human lives.
However, the existing research shows that when a subway fire occurs, due to the problems of closed space, numerous personnel, difficult fire extinguishment and the like, the fire extinguishment is difficult, the fire extinguishment time is further delayed, and irreparable loss is caused to the society and individuals, so that a subway monitoring system is very important.
The subway system is relatively complicated, comprises numerous devices such as a subway water mist system, a detector, a pipeline pressure sensor and a liquid level sensor, acquires information of the devices to display the information to a subway driver, and has a vital significance on the operation safety of the subway, so that a human-computer interaction device applied to a subway cab is needed to be designed.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a subway system human-computer interaction equipment realizes the collection, the demonstration and the interaction of subway system equipment information to ensure the safety of subway operation.
In order to achieve the above object, the present invention provides the following technical solutions: a man-machine interaction device of a subway system comprises a panel and a rear shell, wherein a man-machine interaction screen is integrated on the panel, and a core board circuit assembly and a bottom board circuit assembly are integrated in the rear shell;
the core board circuit component comprises a processor circuit, an EMMC circuit, a DDR4 memory circuit and an integrated coding and decoding circuit; the EMMC circuit is electrically connected with the processor circuit and is used for flashing information of a subway system; the DDR4 memory circuit is electrically connected with the processor circuit, and the DDR4 memory circuit is used as a memory of the man-machine interaction equipment of the subway system; the integrated coding and decoding circuit is electrically connected with the processor circuit and is used for carrying out audio decoding and realizing sound prompt and warning by matching with a loudspeaker;
the bottom plate circuit component comprises a power supply module, a voltage reduction circuit, an audio amplification circuit and an Ethernet transceiving chip circuit; the power module is electrically connected with the voltage reduction circuit, the power module is used for converting power supply voltage and converting the circuit from 24V to 12V, and the voltage reduction circuit is used for converting the voltage from 12V to 5V and converting the voltage from 5V to 3.3V; the audio amplification circuit and the Ethernet transceiver chip circuit are electrically connected with the voltage reduction circuit, the audio amplification circuit is used for amplifying audio signals to achieve early warning and alarming of a man-machine interaction system, and the Ethernet transceiver chip circuit is used for acquiring signals of hardware equipment of a subway system.
As a preferred scheme of the subway system man-machine interaction equipment, the subway system man-machine interaction equipment further comprises a network transformer circuit, wherein the network transformer circuit is electrically connected with the voltage reduction circuit, the network transformer circuit is also electrically connected with the Ethernet transceiver chip circuit, and the network transformer circuit is used for frequency selection, internal and external isolation, impedance matching and filtering of subway system hardware equipment signals.
As the preferable scheme of the man-machine interaction equipment of the subway system, hardware equipment of the subway system comprises a detector, a water mist system valve, a water mist system pipeline pressure sensor and a water mist system liquid level sensor.
As a preferred scheme of the subway system human-computer interaction equipment, the human-computer interaction screen is electrically connected with the processor circuit, and the human-computer interaction screen displays and controls information of the detector, the water mist system valve, the water mist system pipeline pressure sensor and the water mist system liquid level sensor.
As subway system man-machine interaction equipment preferred scheme, the internal connection of back casing has the heat dissipation aluminum sheet, the heat dissipation aluminum sheet is the I shape, the heat dissipation aluminum sheet adopts the heat dissipation aluminium alloy, the heat dissipation aluminum sheet is used for dispelling the heat to nuclear core plate circuit subassembly and bottom plate circuit subassembly.
As an optimal scheme of the man-machine interaction equipment of the subway system, a screen pressing strip is connected between the man-machine interaction screen and the panel; the screen pressing strip comprises a bottom pressing part and an edge pressing part, the bottom pressing part is fixed at the bottom of the man-machine interaction screen, and the edge pressing part is fixed at the edge of the man-machine interaction screen.
As the preferable scheme of the man-machine interaction equipment of the subway system, the processor circuit adopts an RK3568 chip; the EMMC circuit adopts a KLMBG2JETD-B041 chip; the DDR4 memory circuit adopts a K4A8G165WB chip; the integrated coding and decoding circuit adopts an RK809 chip.
As the preferred scheme of man-machine interaction equipment of the subway system, the power module adopts a URB2412LD-30WR3 model; the voltage reduction circuit adopts a SY8113B voltage reduction chip; the audio amplifying circuit adopts an audio power amplifier VA2213; the Ethernet transceiving chip circuit adopts an Ethernet chip RTL8211F; the network transformer circuit adopts a ZXGE-2401-R network transformer.
The utility model has the advantages of as follows: the intelligent interactive screen is provided with a panel and a rear shell, wherein the panel is integrated with an interactive screen, and a core board circuit assembly and a bottom board circuit assembly are integrated in the rear shell; the core board circuit assembly comprises a processor circuit, an EMMC circuit, a DDR4 memory circuit and an integrated coding and decoding circuit; the EMMC circuit is electrically connected with the processor circuit and is used for flashing information of the subway system; the DDR4 memory circuit is electrically connected with the processor circuit, and the DDR4 memory circuit is used as a memory of the man-machine interaction equipment of the subway system; the integrated coding and decoding circuit is electrically connected with the processor circuit and is used for carrying out audio decoding and realizing sound prompt and warning by matching with a loudspeaker; the bottom board circuit component comprises a power supply module, a voltage reduction circuit, an audio amplification circuit and an Ethernet transceiving chip circuit; the power module is electrically connected with the voltage reduction circuit, the power module is used for converting the circuit from 24V to 12V, and the voltage reduction circuit is used for converting the voltage from 12V to 5V and from 5V to 3.3V; the audio amplification circuit and the Ethernet transceiver chip circuit are electrically connected with the voltage reduction circuit, the audio amplification circuit is used for amplifying audio signals to achieve early warning and alarming of a man-machine interaction system, and the Ethernet transceiver chip circuit is used for acquiring signals of hardware equipment of a subway system. The utility model has more stable and efficient circuit structure, high-speed information transmission and fast information conversion, and the system has a memory design and an additional memory design, thus the stored information amount can be larger; the information storage function can be performed under the condition of sudden power failure; the information can be transmitted at high speed through the Ethernet; the fire hazard early warning can be carried out, and the operation safety of a subway system is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is an integrated schematic view of a rear shell and a panel of the man-machine interaction device of the subway system provided in the embodiment of the present invention;
fig. 2 is a schematic view of the inside of a rear shell of the man-machine interaction device of the subway system provided in the embodiment of the present invention;
fig. 3 is the embodiment of the utility model provides an in the embodiment provide a subway system human-computer interaction device circuit frame schematic diagram.
In the figure, 1, panel; 2. a rear housing; 3. a human-computer interaction screen; 4. a core board circuit assembly; 5. a backplane circuit assembly; 6. a processor circuit; 7. an EMMC circuit; 8. a DDR4 memory circuit; 9. an integrated codec circuit; 10. a power supply module; 11. a voltage reduction circuit; 12. an audio amplification circuit; 13. an Ethernet transceiver chip circuit; 14. a network transformer circuit; 15. radiating aluminum sheets; 16. and pressing the screen.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Referring to fig. 1, fig. 2 and fig. 3, an embodiment of the present invention provides a subway system human-computer interaction device, which includes a panel 1 and a rear casing 2, wherein the panel 1 is integrated with a human-computer interaction screen 3, and a core board circuit assembly 4 and a bottom board circuit assembly 5 are integrated in the rear casing 2;
the core board circuit assembly 4 comprises a processor circuit 6, an EMMC circuit 7, a DDR4 memory circuit 8 and an integrated coding and decoding circuit 9; the EMMC circuit 7 is electrically connected with the processor circuit 6, and the EMMC circuit 7 is used for carrying out flash memory on information of a subway system; the DDR4 memory circuit 8 is electrically connected with the processor circuit 6, and the DDR4 memory circuit 8 is used as a memory of the man-machine interaction equipment of the subway system; the integrated coding and decoding circuit 9 is electrically connected with the processor circuit 6, and the integrated coding and decoding circuit 9 is used for carrying out audio decoding and is matched with a loudspeaker to realize sound prompt and warning;
the bottom board circuit assembly 5 comprises a power module 10, a voltage reduction circuit 11, an audio amplification circuit 12 and an Ethernet transceiving chip circuit 13; the power module 10 is electrically connected with the voltage reduction circuit 11, the power module 10 is used for converting the circuit from 24V to 12V, and the voltage reduction circuit 11 is used for converting the voltage from 12V to 5V and from 5V to 3.3V; the audio amplification circuit 12 and the Ethernet transceiver chip circuit 13 are both electrically connected with the voltage reduction circuit 11, the audio amplification circuit 12 is used for amplifying audio signals to achieve human-computer interaction system early warning and alarming, and the Ethernet transceiver chip circuit 13 is used for acquiring subway system hardware equipment signals.
In this embodiment, the processor circuit 6 adopts an RK3568 chip as a high-performance low-power consumption quad-core application processor, which has a power consumption control technology, and compared with a conventional chip, the power consumption is reduced by 20% at the same frequency, and the performance is improved by 10% at the same voltage; the processor circuit 6 performs processing analysis of the information, enabling the overall design and execution of circuit functions.
In this embodiment, the EMMC circuit 7 uses a KLMBG2JETD-B041 chip, and the EMMC circuit 7 is a nonvolatile memory, and can store data when powered on or powered off, thereby preserving the integrity of information data to a greater extent. The EMMC circuit 7 designed based on the KLMBG2JETD-B041 chip can perform various information flash memory functions of a subway system and ensure that information can be stored even if the power is off.
In this embodiment, the DDR4 memory circuit 8 adopts a K4A8G165WB chip, the DDR4 memory circuit 8 is a whole system memory design, and the DR4 memory circuit is matched with the EMMC circuit 7, so that the memory and flash memory functions of the circuit are realized, the data storage capability of the circuit is improved to the greatest extent, and the integrity of data is ensured.
In this embodiment, the integrated codec circuit 9 employs an RK809 chip, and the RK809 chip employed by the integrated codec circuit 9 is a Power Management Integrated Circuit (PMIC) integrated codec, integrates a complete audio system, and has the characteristic of high response speed, and cooperates with the processor circuit 6 chip to perform audio decoding analysis, and cooperates with a speaker to implement sound prompt and warning functions.
In this embodiment, the power module 10 is of a URB2412LD-30WR3 type; the power module 10 has the characteristics of high efficiency and low power consumption, and can input under-voltage protection, output short circuit, overvoltage, overcurrent protection and the like.
In this embodiment, the voltage-reducing circuit 11 adopts a SY8113B voltage-reducing chip. The power module 10 converts the circuit from 24V to 12V, and then converts the circuit from 12V to 5V and from 5V to 3.3V through the voltage reduction circuit 11. The voltage is converted into a circuit applicable voltage of 3.3V, and then the circuit is connected with an Ethernet transceiving chip circuit 13, so that high-speed transmission of Ethernet data can be performed; meanwhile, the voltage reduction circuit 11 is also connected with the audio amplification circuit 12, so that the amplification of audio signals can be realized, a loudspeaker is pushed to sound, and the sound prompt effects of early warning, alarming and the like of a human-computer interaction system are implemented.
In this embodiment, the audio amplifying circuit 12 adopts the audio power amplifier VA2213, and the audio power amplifier VA2213 has the advantages of high efficiency, low distortion, and the like.
In this embodiment, the ethernet transceiver chip circuit 13 adopts an ethernet chip RTL8211F. The selected Ethernet transceiver chip circuit 13 has the characteristics of high-speed transmission and has the functions of polarity correction, adaptive equalization, crosstalk elimination, echo elimination, timing recovery, error correction and the like.
In this embodiment, the system further includes a network transformer circuit 14, the network transformer circuit 14 is electrically connected to the voltage-reducing circuit 11, the network transformer circuit 14 is also electrically connected to the ethernet transceiver chip circuit 13, and the network transformer circuit 14 is used for performing frequency selection, internal and external isolation, impedance matching and filtering on hardware device signals of the subway system.
Specifically, the network transformer circuit 14 employs a ZXGE-2401-R network transformer. The ZXGE-2401-R network transformer can be used for frequency selection, internal and external isolation, impedance matching, in-band filtering and the like of signals, and meanwhile, the network transformer with a specific model can realize the simultaneous transceiving function of network transmission, so that the transmission rate can be greatly improved, and timely response is realized.
In this embodiment, the hardware device of the subway system includes a detector, a water mist system valve, a water mist system pipeline pressure sensor and a water mist system liquid level sensor. The man-machine interaction screen 3 is electrically connected with the processor circuit 6, and the man-machine interaction screen 3 displays and controls information of the detector, the water mist system valve, the water mist system pipeline pressure sensor and the water mist system liquid level sensor.
Specifically, the man-machine interaction screen 3 is installed on an operation table of a subway cab, the core circuit component and the bottom board circuit component 5 are installed in the rear shell 2 at the back of the man-machine interaction screen 3, information collected by all items can be transmitted through an Ethernet bus, and the detected information can be displayed on the man-machine interaction screen 3 and command control can be achieved through conversion processing and execution of the information through a hardware circuit.
The temperature monitoring device can be connected with the detectors through the Ethernet bus, can check the temperature value of each detector, can set early warning temperature and alarm temperature, and can display the real-time temperature of the early warning temperature and the alarm temperature.
The water mist control system can be connected with a valve, a temperature sensor, a liquid level sensor, a pipeline pressure sensor and the like of the water mist system, and displays the state of the valve, the temperature information of the water mist system, the liquid level information and the pipeline pressure.
Wherein, the open-close state of the water mist system valve can be manually set through the man-machine interaction screen 3, and the fault information of the detector, the valve, the temperature sensor, the liquid level sensor, the pipeline pressure sensor and other equipment can be checked.
In the embodiment, the inside of the rear shell 2 is connected with a heat dissipation aluminum sheet 15, and the heat dissipation aluminum sheet 15 is used for heat dissipation of the man-machine interaction equipment of the subway system; a screen pressing strip 16 is connected between the man-machine interaction screen 3 and the panel 1, the screen pressing strip 16 comprises a bottom pressing part and an edge pressing part, the bottom pressing part is fixed at the bottom of the man-machine interaction screen 3, and the edge pressing part is fixed at the edge of the man-machine interaction screen 3.
Specifically, heat dissipation aluminum sheet 15 plays the radiating effect of human-computer interaction equipment, specifically dispels the heat to core plate circuit subassembly 4 and bottom plate circuit subassembly 5 that are connected through the paster connector, increase of service life, and screen layering 16 plays the fixed and guard action in edge of human-computer interaction screen 3.
It should be emphasized that the processor circuit 6, the EMMC circuit 7, the DDR4 memory circuit 8, the integrated codec circuit 9, the power module 10, the voltage reduction circuit 11, the audio amplification circuit 12, the ethernet transceiver chip circuit 13, and the network transformer circuit 14 designed in the technical solution all belong to the existing models, the technical solution performs combined design and application on the hardware circuit as needed, and does not involve improvement of the method, the method itself that depends on belongs to the existing technology, for example, fire alarm information, various fault information display, and the priority is always fire alarm information; various past data information can be selected and inquired according to the date; when fire alarm information and fault information exist, the function of automatic sound prompt is realized; the staff can carry out the amortization setting to the system after receiving the information.
To sum up, the utility model is provided with a panel 1 and a rear shell 2, wherein the panel 1 is integrated with an man-machine interaction screen 3, and a core board circuit component 4 and a bottom board circuit component 5 are integrated in the rear shell 2; the core board circuit assembly 4 comprises a processor circuit 6, an EMMC circuit 7, a DDR4 memory circuit 8 and an integrated coding and decoding circuit 9; the EMMC circuit 7 is electrically connected with the processor circuit 6, and the EMMC circuit 7 is used for carrying out flash memory on information of a subway system; the DDR4 memory circuit 8 is electrically connected with the processor circuit 6, and the DDR4 memory circuit 8 is used as a memory of the man-machine interaction equipment of the subway system; the integrated coding and decoding circuit 9 is electrically connected with the processor circuit 6, and the integrated coding and decoding circuit 9 is used for carrying out audio decoding and is matched with a loudspeaker to realize sound prompt and warning; the bottom board circuit component 5 comprises a power module 10, a voltage reduction circuit 11, an audio amplification circuit 12 and an Ethernet transceiving chip circuit 13; the power module 10 is electrically connected with the voltage reduction circuit 11, the power module 10 is used for converting the circuit from 24V to 12V, and the voltage reduction circuit 11 is used for converting the voltage from 12V to 5V and from 5V to 3.3V; the audio amplification circuit 12 and the Ethernet transceiver chip circuit 13 are both electrically connected with the voltage reduction circuit 11, the audio amplification circuit 12 is used for amplifying audio signals to achieve human-computer interaction system early warning and alarming, and the Ethernet transceiver chip circuit 13 is used for acquiring subway system hardware equipment signals. The utility model discloses an ethernet bus can be connected with the detector, can look over each detector temperature value to can set up early warning temperature, can show its real-time temperature. The water mist display device can be connected with a valve, a temperature sensor, a liquid level sensor, a pipeline pressure sensor and the like of a water mist system to display the state of the valve, the temperature information of the water mist system, the liquid level information and the pipeline pressure. The open-close state of the water mist system valve can be manually set through the man-machine interaction screen 3, and fault information of equipment such as a detector, a valve, a temperature sensor, a liquid level sensor and a pipeline pressure sensor can be checked. The utility model has more stable and efficient circuit structure, high-speed information transmission and fast information conversion, and the system has a memory design and an additional memory design, thus the stored information amount can be larger; the information storage function can be performed under the condition of sudden power failure; the information can be transmitted at high speed through the Ethernet; the fire hazard early warning can be carried out, and the operation safety of a subway system is ensured.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. The man-machine interaction equipment of the subway system is characterized by comprising a panel (1) and a rear shell (2), wherein a man-machine interaction screen (3) is integrated on the panel (1), and a circuit component (4) of a core board and a circuit component (5) of a bottom board are integrated in the rear shell (2);
the core board circuit assembly (4) comprises a processor circuit (6), an EMMC circuit (7), a DDR4 memory circuit (8) and an integrated coding and decoding circuit (9); the EMMC circuit (7) is electrically connected with the processor circuit (6), and the EMMC circuit (7) is used for flashing information of a subway system; the DDR4 memory circuit (8) is electrically connected with the processor circuit (6), and the DDR4 memory circuit (8) is used as a memory of the man-machine interaction equipment of the subway system; the integrated coding and decoding circuit (9) is electrically connected with the processor circuit (6), and the integrated coding and decoding circuit (9) is used for carrying out audio decoding and is matched with a loudspeaker to realize sound prompt and warning;
the bottom board circuit assembly (5) comprises a power module (10), a voltage reduction circuit (11), an audio amplification circuit (12) and an Ethernet transceiving chip circuit (13); the power module (10) is electrically connected with the voltage reduction circuit (11), the power module (10) is used for performing power supply voltage conversion on the circuit, and the voltage reduction circuit (11) is used for performing voltage reduction conversion; the audio amplification circuit (12) and the Ethernet transceiver chip circuit (13) are electrically connected with the voltage reduction circuit (11), the audio amplification circuit (12) is used for amplifying audio signals to realize early warning and alarming of a man-machine interaction system, and the Ethernet transceiver chip circuit (13) is used for acquiring signals of hardware equipment of a subway system;
the frequency selection circuit is characterized by further comprising a network transformer circuit (14), wherein the network transformer circuit (14) is electrically connected with the voltage reduction circuit (11), the network transformer circuit (14) is also electrically connected with the Ethernet transceiver chip circuit (13), and the network transformer circuit (14) is used for frequency selection, internal and external isolation, impedance matching and filtering of subway system hardware equipment signals;
the subway system hardware equipment comprises a detector, a water mist system valve, a water mist system pipeline pressure sensor and a water mist system liquid level sensor;
the human-computer interaction screen (3) is electrically connected with the processor circuit (6), and the human-computer interaction screen (3) displays and controls information of the detector, the water mist system valve, the water mist system pipeline pressure sensor and the water mist system liquid level sensor;
the heat dissipation aluminum sheet (15) is connected to the inside of the rear shell (2), the heat dissipation aluminum sheet (15) is in an I shape, the heat dissipation aluminum sheet (15) is made of a heat dissipation aluminum section, and the heat dissipation aluminum sheet (15) is used for dissipating heat of the core board circuit assembly (4) and the base board circuit assembly (5);
the screen pressing strip (16) is connected between the man-machine interaction screen (3) and the panel (1), the screen pressing strip (16) comprises a bottom pressing part and an edge pressing part, the bottom pressing part is fixed at the bottom of the man-machine interaction screen (3), and the edge pressing part is fixed at the edge of the man-machine interaction screen (3).
2. A metro system human-computer interaction device according to claim 1, wherein said processor circuit (6) employs a RK3568 chip; the EMMC circuit (7) adopts a KLMBG2JETD-B041 chip; the DDR4 memory circuit (8) adopts a K4A8G165WB chip; the integrated coding and decoding circuit (9) adopts an RK809 chip.
3. A metro system human-computer interaction device according to claim 2, wherein said power supply module (10) is of the type URB2412LD-30WR 3; the voltage reduction circuit (11) adopts a SY8113B voltage reduction chip.
4. A subway system man-machine interaction device as claimed in claim 3, wherein said audio amplifier circuit (12) is an audio power amplifier VA2213, and said ethernet transceiver chip circuit (13) is an ethernet chip RTL8211F.
5. A subway system human-computer interaction device as claimed in claim 4, wherein said network transformer circuit (14) employs a ZXGE-2401-R network transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223160016.8U CN218728696U (en) | 2022-11-28 | 2022-11-28 | Subway system human-computer interaction equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223160016.8U CN218728696U (en) | 2022-11-28 | 2022-11-28 | Subway system human-computer interaction equipment |
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| Publication Number | Publication Date |
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| CN218728696U true CN218728696U (en) | 2023-03-24 |
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| CN202223160016.8U Active CN218728696U (en) | 2022-11-28 | 2022-11-28 | Subway system human-computer interaction equipment |
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