A control system for starting and stopping a vehicle display screen with built-in UPS

Abstract

The invention discloses a control system for starting and stopping a vehicle-mounted display screen with a built-in UPS, and relates to the technical field of network signals of rail transit trains. The structure thereof comprises a DU system, wherein three pins are arranged at the power port of the DU system, wherein the first pin is connected to the negative pole of a power supply module, the second pin is connected to the positive pole of the power supply module and a backup power supply module, and the third pin is connected to a signal judgment module, wherein the signal judgment module is connected in series with the positive pole of the power supply module; wherein the power supply module is connected to a preparation power circuit, and the backup power supply module and the signal judgment module are connected to a permanent power circuit. The system logic in the invention is more perfect, and the circuit working state is more reliable. An application program can judge the state that a device should be in at this time by monitoring the device hardware information of an FT port, so as to realize the startup, shutdown or switching of the hardware device to a UPS power supply state.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit train network signals, and in particular to a vehicle-mounted display screen start-stop control system with a built-in UPS. Background Art

[0002] The UPS available on the market are mainly divided into two categories and three forms: one is the backup type, the other is the online type, and the other is the online interactive type which is between the two. It is mainly composed of a rectifier, an inverter, a battery pack and a switching switch. Here we mainly discuss the UPS's internal battery power failure detection and switching function through a switching switch after the vehicle loses power in an emergency.

[0003] At present, UPS applications can be divided into two categories: one is UPS power system equipment for information equipment; the other is UPS power system equipment for industrial power. For example, UPS power supply, as an important peripheral of computer information system, can protect computer data in the event of sudden power outage and prevent instantaneous power outage from causing harm to users.

[0004] Although most UPS circuits on the market are safe and stable, their working methods are not flexible enough. They serve as another load power supply module besides the external power supply, which is the backup type among the three types of UPS. The external power supply first passes through the UPS circuit, and is output to the load circuit after rectification and inversion. When the external power supply is cut off, the UPS continues to supply power. However, since the circuit has no other logical control, there may be some defects, such as the situation that the external power supply has power but it is still powered by the battery, or the load is directly started by the battery when there is no external power supply.

[0005] To this end, the present invention discloses a control system for starting and stopping a vehicle-mounted display screen with a built-in UPS. Compared with the prior art, the system logic in the present invention is more complete and the circuit working state is more reliable. The application can monitor the device hardware information of the FT port to determine the state the device should be in at this time, thereby realizing the startup, shutdown or switching of the hardware device to the UPS power supply state. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a control system for starting and stopping a vehicle-mounted display screen with a built-in UPS. Compared with the prior art, the system logic in the present invention is more complete and the circuit working state is more reliable. The application can monitor the device hardware information of the FT port to determine the state the device should be in at this time, thereby realizing the startup, shutdown or switching of the hardware device to the UPS power supply state.

[0007] The present invention is implemented by the following technical scheme: a control system for starting and stopping a vehicle-mounted display screen with a built-in UPS, the structure of which includes a DU system, wherein three pins are arranged at the power port of the DU system, the first pin is connected to the negative pole of the power supply module, the second pin is connected to the positive pole of the power supply module and the backup power supply module, and the third pin is connected to the signal judgment module, and the signal judgment module is connected in series with the positive pole of the power supply module;

[0008] Among them, the power supply module is connected to the preparation power circuit, and the backup power supply module and the signal judgment module are connected to the permanent power circuit.

[0009] Preferably, the backup power supply module consists of a second switch and a first diode connected in series.

[0010] Preferably, the signal determination module comprises a break-before-make switching contact point relay and a third switch.

[0011] Preferably, the DU system is powered by a preparation circuit, and the DU system outputs a start-up enable signal to access the permanent circuit.

[0012] Preferably, the state of the DU system is adjusted according to the state of the vehicle, and the DU system includes the following states: when the vehicle is awakened, the vehicle's standby circuit is energized, and at this time, the DU system starts normally;

[0013] When the vehicle is dormant, the normally closed contact of the break-before-make switching contact point relay is opened, and the DU system reads that the FT state is 0, then executes the shutdown command to shut down the DU system;

[0014] When the vehicle has no sleep signal and the vehicle standby circuit loses power unexpectedly, the DU system will continue to work using its UPS until its UPS runs out of power or it receives a shutdown command;

[0015] Under emergency maintenance conditions, the vehicle is not awakened, and the vehicle standby circuit has no power. The DU system works for a period of time with the help of its own UPS. The second switch is closed first. At this time, the DU system has external power supply, so that the DU can start normally. After the hardware driver of the DU is started, the second switch is disconnected, and the DU system will be powered by its own UPS until the UPS is exhausted or receives a shutdown command.

[0016] The present invention discloses a vehicle-mounted display screen start-stop control system with built-in UPS. Compared with the prior art:

[0017] Compared with the existing pure circuit to achieve UPS power switching working mode, this switching mechanism based on program monitoring has more complete logic and more reliable circuit working status. The application can monitor the device hardware information of the FT port to determine the state the device should be in at this time, and realize the startup, shutdown or switching to UPS power supply state of the hardware device. For the DU system, in addition to the two positive and negative pins of the power supply itself, a hardware input signal is also provided. The application is used to read the state of the signal to control the startup and shutdown of the device, realizing a logic that the load can only be started when there is external power supply, and then switched to UPS power supply. UPS self-start is not allowed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is a circuit diagram of a UPS system in the prior art; FIG. 2 is a circuit diagram of a control system in an embodiment. DETAILED DESCRIPTION

[0019] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiment.

[0020] As shown in Figure 1, the traditional UPS system consists of a rectifier, a battery, an inverter, a static switch and a control system. It first converts the AC power input from the mains into a regulated DC power supply, supplies the battery and the inverter, and then re-converts it into a stable, pure and high-quality AC power supply through the inverter. This circuit can eliminate the power supply problems (voltage fluctuations, frequency fluctuations, harmonic distortion and various interferences) that may occur in the re-input power supply, but the defects are also obvious. Its working mode is not flexible enough. It is another load power supply module outside the external power supply, that is, it belongs to the backup type among the three forms of UPS. The external power supply first passes through the UPS circuit, and is rectified and inverted before being output to the load circuit. When the external power supply is cut off, the UPS continues to supply power. However, since the circuit has no other logic control, there may be some defects, such as the situation where the external power supply is powered but the battery is still used for power supply. Or the load is directly started by the battery when there is no external power supply.

[0021] Based on the above problems, the present invention discloses a control system for starting and stopping a vehicle-mounted display screen with a built-in UPS, the structure of which includes a DU system, wherein three pins are arranged at the power port of the DU system, the first pin is connected to the negative pole of the power supply module, the second pin is connected to the positive pole of the power supply module and the backup power supply module, the third pin is connected to the signal judgment module, and the signal judgment module is connected in series with the positive pole of the power supply module; the power supply module is connected to a preparation power circuit, the backup power supply module and the signal judgment module are connected to a permanent power circuit, the backup power supply module is composed of a second switch and a first diode in series, the signal judgment module includes a break-before-make conversion contact point relay and a third switch, the DU system is powered by the preparation power circuit, and the DU system outputs a start enable signal to be connected to the permanent power circuit.

[0022] The state of the DU system in the present invention is adjusted according to the state of the vehicle, and the DU system includes the following states: when the vehicle is awakened, the vehicle's standby circuit is powered, and at this time, the DU system starts normally;

[0023] When the vehicle is dormant, the normally closed contact of the break-before-make switching contact point relay is opened, and the DU system reads that the FT state is 0, then executes the shutdown command to shut down the DU system;

[0024] When the vehicle has no sleep signal and the vehicle standby circuit loses power unexpectedly, the DU system will continue to work using its UPS until its UPS runs out of power or it receives a shutdown command;

[0025] Under emergency maintenance conditions, the vehicle is not awakened, and the vehicle standby circuit has no power. The DU system works for a period of time with the help of its own UPS. The second switch is closed first. At this time, the DU system has external power supply, so that the DU can start normally. After the hardware driver of the DU is started, the second switch is disconnected, and the DU system will be powered by its own UPS until the UPS is exhausted or receives a shutdown command.

[0026] For ease of understanding, the present invention discloses a specific embodiment, as shown in the circuit diagram of FIG2 , the embodiment discloses a control system for starting and stopping a vehicle-mounted display screen with a built-in UPS, the control system is composed of an external control circuit and a DU device, the power port of the DU device is composed of three pins, two of which are the positive and negative poles of the power supply, and one is the device hardware information pin, wherein the 0V pin is connected to the negative pole of the 110V power supply, +UB is connected to the positive pole of the 110V external power supply and the positive pole of the UPS backup power supply 110V, wherein the backup power supply route is composed of a switch and a diode to ensure that the positive pole of the external power supply will not affect the positive pole of the backup power supply, and the device hardware signal pin is externally connected to a signal judgment circuit, which is composed of a break-before-make conversion contact point relay and a switch, and is connected in parallel with the UPS power supply 110V positive pole into the circuit.

[0027] For the control system in the embodiment, under normal working conditions, the DU device is powered by the vehicle's 110V standby power, and the start-up enable signal of the DU device is connected to the vehicle's 110V permanent power circuit.

[0028] When the vehicle wakes up, the vehicle's 110V standby circuit is energized and the DU equipment starts normally.

[0029] When the vehicle is dormant, the SLR normally closed contact opens, and the DU (application) reads that the FT status is 0, then executes the shutdown command (halt) to shut down the DU.

[0030] When the vehicle has no sleep signal (FT=1), and the vehicle's 110V standby circuit loses power unexpectedly (fuse blown, battery undervoltage, etc.), the DU device will continue to work using its UPS until its UPS runs out of power or it receives a shutdown command (a soft button can be set on the DU interface to send a shutdown command to the device).

[0031] In emergency maintenance conditions, the vehicle is not awake, the vehicle's 110V standby circuit is out of power, and the DU needs to work with its own UPS for a period of time. You need to close DUCB2 first to allow the DU to have external power supply (24V~110V) so that the DU can start normally. After the DU's hardware driver is started (that is, after the startup screen appears on the DU interface), disconnect DUCB2, and the DU will be powered by its own UPS until the UPS runs out of power or receives a shutdown command (you can set a soft button on the DU interface to send a shutdown command to the device).

[0032] It is worth noting that the external power supply and control interface of the DU device in the embodiment is an M23 interface, where, as shown in FIG1 , +Ub,0V is the positive and negative interface of the external power supply of the DU device, and FT is the hard-line input signal of the DU device. The application can control the shutdown of the device by reading the status of the signal. The DU device cannot be self-started by its own UPS, and can only switch to UPS power supply to maintain operation after being started with external power supply.

[0033] DU can be activated in any of the following situations:

[0034] When the power supply interface (+Ub, 0V) of the DU is switched from the off state to the powered state, the DU device starts.

[0035] When the power supply interface of the DU device is always powered, the power supply interface of the DU device needs to be disconnected and then closed again, and the DU device can be started; or the DU device can be started by giving a power-on pulse signal to the FT interface.

[0036] DU The device can be shut down in any of the following situations: There is no external power supply to the DU and the UPS is exhausted;

[0037] The DU device receives a shutdown command (halt).

[0038] It should be further explained that the DUCB2 in the embodiment can be replaced by a self-reset button switch, but the switch must be able to maintain for more than 15 seconds to ensure that the DU completes the hardware drive startup, and the FTCB and SLR loops can use the SLR signal sent by the network to replace the loop function.

[0039] In summary, compared with the existing technology, compared with the existing pure circuit to achieve UPS power switching working mode, this switching mechanism based on program monitoring has more complete logic and more reliable circuit working state. The application can monitor the device hardware information of the FT port to determine the state the device should be in at this time, and realize the startup, shutdown or switching to UPS power supply state of the hardware device. For the DU system, in addition to the two positive and negative pins of the power supply itself, it also provides a hardware input

[0040] Input signal, use the application to read the signal status to control the start and shutdown of the device, implement a logic, the load can only be started when there is external power supply, and then switch to UPS power supply, UPS self-start is not allowed.

[0041] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A vehicle-mounted display screen start-stop control system with built-in UPS, characterized in that: It includes a DU system, wherein three pins are arranged at the power port of the DU system, the first pin is connected to the negative pole of the power supply module, the second pin is connected to the positive pole of the power supply module and the backup power supply module, and the third pin is connected to the signal judgment module, and the signal judgment module is connected in parallel with the positive pole of the backup power supply module; wherein the power supply module is connected to the preparation power circuit, and the backup power supply module and the signal judgment module are connected to the permanent power circuit; The backup power supply module is composed of a second switch and a first diode connected in series; The signal determination module includes a break-before-make switching contact point relay and a third switch; The state of the DU system is adjusted according to the state of the vehicle, and the DU system includes the following states: when the vehicle is awakened, the vehicle's standby circuit is energized, and at this time, the DU system starts normally; When the vehicle is dormant, the normally closed contact of the break-before-make switching contact point relay is opened, and the DU system reads that the FT state is 0, then executes the shutdown command to shut down the DU system, and FT is a hard-line input signal of the DU system; When the vehicle has no sleep signal and the vehicle standby circuit loses power unexpectedly, the DU system will continue to work using its UPS until its UPS runs out of power or it receives a shutdown command; Under emergency maintenance conditions, the vehicle is not awakened, and the vehicle standby circuit is out of power. The DU system works for a period of time with the help of its own UPS. The second switch is closed first. At this time, the DU system has external power supply, so that the DU can start normally. After the hardware driver of the DU is started, the second switch is disconnected, and the DU system will be powered by its own UPS until the UPS runs out of power or receives a shutdown command. The DU system is powered by a preparation circuit, and the DU system outputs a start-up enable signal to access the permanent circuit.

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