CN113346604A

CN113346604A - Control system for starting and stopping vehicle-mounted display screen with UPS

Info

Publication number: CN113346604A
Application number: CN202110652348.9A
Authority: CN
Inventors: 王涛
Original assignee: Nanjing Xingdingsheng Electric Equipment Co ltd
Current assignee: Nanjing Xingdingsheng Electric Equipment Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-09-03

Abstract

The invention discloses a control system for starting and stopping a vehicle-mounted display screen with a UPS (uninterrupted power supply), which relates to the technical field of rail transit train network signals and structurally comprises a DU (data acquisition) system, wherein three pins are arranged at the position of a power supply port of the DU system, the first pin is connected with the cathode of a power supply module and a first switch, the second pin is connected with the anode of the power supply module and a standby power module, the third pin is connected with a signal judgment module, and the signal judgment module is connected with the anode of the power supply module in parallel; the power supply module is connected to the preparation circuit, the standby power supply module and the signal judgment module are connected to the permanent circuit, the system logic is more perfect, the circuit working state is more reliable, and the application program can judge the state of the equipment at the moment by monitoring the hardware information of the FT port, so that the hardware equipment is started, shut down or switched to the UPS power supply state.

Description

Control system for starting and stopping vehicle-mounted display screen with UPS

Technical Field

The invention relates to the technical field of rail transit train network signals, in particular to a control system for starting and stopping a vehicle-mounted display screen with a UPS.

Background

The UPSs available on the market are mainly divided into two main categories of three forms: the UPS is mainly used for realizing the power failure detection and switching functions of an internal storage battery through the change-over switch after the vehicle is powered off in an emergency.

The application of UPS in the field can be divided into two categories: one type of information equipment is UPS power system equipment; the UPS power system equipment for the second type of industrial power. For example, the UPS is used as an important peripheral of a computer information system, and can protect computer data under the condition of sudden power failure and prevent damage to users caused by instantaneous power failure.

Although most UPS circuits on the market have higher safety and stability, the working mode is not flexible enough, the UPS circuits are used as another load power supply module outside an external power supply, namely, the UPS circuits belong to a back type of three types of UPS, the external power supply firstly passes through the UPS circuits, is rectified and inverted and then is output to a load circuit, when the external power supply is powered off, the UPS continues to supply power, but partial defects exist because the circuit has no other logic control, and the situation that the external power supply is powered on but is still supplied by a storage battery occurs, or the load is directly started by the storage battery under the situation that the external power supply is not powered on.

Therefore, the invention discloses a control system for starting and stopping a vehicle-mounted display screen with a UPS, compared with the prior art, the system logic is more perfect, the circuit working state is more reliable, and an application program can judge the state of equipment at the moment by monitoring the hardware information of the FT port, so that the hardware equipment is started, shut down or switched to the UPS power supply state.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a control system for starting and stopping a vehicle-mounted display screen with a UPS, compared with the prior art, the system logic is more perfect, the circuit working state is more reliable, and an application program can judge the state of equipment at the moment by monitoring the hardware information of the FT port, so that the hardware equipment is started, shut down or switched to the UPS power supply state.

The invention is realized by the following technical scheme: a control system for starting and stopping a vehicle-mounted display screen with a UPS structurally comprises a DU system, wherein three pins are arranged at the position of a power supply port of the DU system, the first pin is connected with the negative electrode of a power supply module and a first switch, the second pin is connected with the positive electrode of the power supply module and a standby power supply module, the third pin is connected with a signal judgment module, and the signal judgment module is connected with the positive electrode of the power supply module in parallel;

the power supply module is connected to the preparation circuit, and the standby power supply module and the signal judgment module are connected to the permanent circuit.

Preferably, the standby power supply module is composed of a second switch and a first diode connected in series.

Preferably, the signal judgment module comprises a break-before-make switching contact relay and a third switch.

Preferably, the DU system supplies its operation by preparing the electrical loop, and the DU system outputs a start enable signal coupled to the permanent electrical loop.

Preferably, the state of the DU system is adjusted depending on the state of the vehicle, the DU system including the following states;

when the vehicle is awakened, a preparation circuit of the vehicle is powered on, and at the moment, the DU system is normally started;

when the vehicle is in a dormant state, the normally closed contact of the relay is opened, the DU system reads that the FT state is 0, and then a shutdown instruction is executed, and the DU system is closed;

when the vehicle has no dormancy signal and the vehicle standby power loop is accidentally dropped, the DU system continues to work by using the UPS of the DU system until the electric quantity of the UPS of the DU system is exhausted or the DU system receives a shutdown instruction;

under the working condition of emergency maintenance, the vehicle is not awakened, the vehicle standby electric loop is not electrified, the DU system works for a period of time by virtue of the UPS of the DU system, the second switch is closed firstly, and at the moment, the DU system is externally supplied with power, so that the DU can be started normally; and after the hardware drive of the DU is started, the second switch is disconnected, and the DU system supplies power through the UPS of the DU system until the electric quantity of the UPS is exhausted or the DU system receives a shutdown instruction.

The invention discloses a control system for starting and stopping a vehicle-mounted display screen with a UPS, which is compared with the prior art:

compared with the existing working mode of realizing UPS power supply switching by a pure circuit, the switching mechanism based on program monitoring has more perfect logic and more reliable circuit working state, an application program can judge the state of the equipment at the moment by monitoring the equipment hardware information of an FT port, and realize the starting, shutdown or switching to the UPS power supply state of the hardware equipment.

Drawings

FIG. 1 is a schematic circuit diagram of a prior art UPS system;

fig. 2 is a schematic circuit diagram of a control system in an embodiment.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

As shown in fig. 1, the conventional UPS system comprises a rectifier, a storage battery, an inverter, a static switch and a control system, wherein an ac power input by a commercial power is first converted into a regulated dc power, which is then supplied to the storage battery and the inverter, and then converted into a stable, clean and high-quality ac power again by the inverter, such a circuit can eliminate power problems (voltage fluctuation, frequency fluctuation, harmonic distortion and various interferences) that may occur in the power input again, but the defect is also obvious, the operation mode is not flexible enough, the conventional UPS system is used as another load power supply module outside an external power supply, namely, belongs to a back type among three types of UPS, the external power supply is first rectified and inverted by a UPS circuit and then output to a load circuit, when the external power supply is interrupted, the UPS system continues to supply power, but because the circuit has no other logic control, some defects may exist, there are situations where the external power source is powered, but is still powered by a battery. Or the load is directly started by the storage battery under the condition that no external power supply supplies power.

Based on the problems, the invention discloses a control system for starting and stopping a vehicle-mounted display screen with a UPS, which structurally comprises a DU system, wherein three pins are arranged at the position of a power supply port of the DU system, the first pin is connected with the negative pole of a power supply module and a first switch, the second pin is connected with the positive pole of the power supply module and a standby power supply module, the third pin is connected with a signal judgment module, and the signal judgment module is connected with the positive pole of the power supply module in parallel; the power supply module is connected to a preparation circuit, the standby power supply module and the signal judgment module are connected to a permanent circuit, the standby power supply module is composed of a second switch and a first diode which are connected in series, the signal judgment module comprises a break-before-make conversion contact point relay and a third switch, the DU system supplies power for the work of the DU system through the preparation circuit, and the DU system outputs a starting enabling signal to be connected to the permanent circuit.

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:

For convenience of understanding, the present invention discloses a specific embodiment, as shown in a circuit diagram of fig. 2, the embodiment discloses a control system for starting and stopping a vehicle-mounted display screen with a UPS, the control system is composed of an external control circuit and a DU device, a power port of the DU device is composed of three pins, two of which are power supply positive and negative electrodes, and the other is a device hardware information pin, wherein a pin 0V is connected with a power supply 110V negative electrode, and + UB is connected with a 110V external power supply positive electrode and a UPS backup power supply 110V positive electrode, wherein a backup power supply circuit is composed of a switch and a diode to ensure that the external power supply positive electrode does not affect the backup power supply positive electrode, and the device hardware signal pin is externally connected with a signal judgment circuit which is composed of a break before make switching contact relay and a switch and is connected in parallel with the UPS power supply 110V positive electrode to form a circuit.

For the control system in the embodiment, under a normal working condition, the DU device supplies power for the operation of the DU device through 110V standby power of the vehicle, and the starting enabling signal of the DU device is connected to a 110V permanent electric loop of the vehicle.

When the vehicle wakes up, the 110V standby electric loop of the vehicle is powered on, and then the DU device is started normally.

When the vehicle is in a dormant state, the SLR normally closed contact is opened, the DU (application program) reads that the FT state is 0, and then a shutdown command (halt) is executed to close the DU.

When the vehicle has no sleep signal (FT ═ 1), the vehicle 110V prepares for the electrical circuit to drop unexpectedly (fuse disconnection, battery undervoltage, etc.), and the DU device will continue to operate using its UPS until its UPS runs out of charge or it receives a shutdown command (a soft button can be set through the DU interface to send the shutdown command to the device).

Under emergency maintenance conditions, the vehicle is not awake, the vehicle 110V ready electrical loop is dead, and the DU needs to operate for a period of time with its own UPS. It is necessary to close the DUCB2 first to make the DU externally powered (24V-110V) so that the DU can start normally. After the hardware drive of the DU is started (i.e. after a start picture appears on the DU interface), the DUCB2 is disconnected, and the DU supplies power through its own UPS until the UPS runs out of power or receives a shutdown instruction (a shutdown instruction is sent to the device by setting a soft button on the DU interface).

It should be noted that, in the embodiment, the external power supply and control interface of the DU device is an M23 interface, where as shown in fig. 1, + Ub,0V is a positive/negative interface of the external power supply of the DU device, FT is a hard-line input signal of the DU device, the application program can control shutdown of the device by reading a state of the signal, the DU device cannot be self-started by its own UPS, and the UPS can be switched to power supply maintenance operation only after the external power supply is started.

The DU may be initiated in either of the following cases:

when the power supply interface (+ Ub,0V) of the DU is switched from the non-power state to the power-on state, the DU device is started.

When the power supply interface of the DU equipment is always in a power state, the power supply interface of the DU equipment needs to be closed again after being disconnected, and the DU equipment can be started; or the DU device may be activated by giving the FT interface a power-on pulse signal.

DU is either the following, the device may shut down:

no power is supplied outside the DU, and the electric quantity of the UPS is exhausted;

the DU device receives a shutdown instruction (halt).

It should be further noted that the DUCB2 in the embodiment can be replaced by a self-resetting push button switch, but the switch must be maintained for more than 15s to ensure that the DU completes the hardware drive start, and the FTCB, SLR loop can replace the loop function with the SLR signal sent by the network.

Compared with the prior art, compared with the existing working mode of realizing UPS power supply switching by a pure circuit, the switching mechanism based on program monitoring has more perfect logic and more reliable circuit working state, an application program can judge the state of the equipment at the moment by monitoring the equipment hardware information of an FT port, so as to realize the starting, the shutdown or the switching to the UPS power supply state of the hardware equipment, for a DU system, besides two pins of a power supply anode and a power supply cathode, a hardware input signal is also provided, the application program is used for reading the state of the signal to control the starting and the shutdown of the equipment, a logic is realized, a load can be started only under the condition that power is supplied externally, then the load is switched to the UPS power supply, and the UPS self-starting cannot be carried out.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims

1. A control system for starting and stopping a vehicle-mounted display screen with a UPS is characterized by comprising a DU system, wherein three pins are arranged at the position of a power supply port of the DU system, the first pin is connected with the negative electrode of a power supply module and a first switch, the second pin is connected with the positive electrode of the power supply module and a standby power supply module, the third pin is connected with a signal judgment module, and the signal judgment module is connected with the positive electrode of the power supply module in parallel;

2. The system for controlling the start and stop of the vehicle display screen with the UPS of claim 1, wherein the standby power supply module is composed of a second switch and a first diode which are connected in series.

3. The system for controlling the start and stop of the vehicle-mounted display screen with the UPS of claim 2, wherein the signal judgment module comprises a break before make conversion contact point relay and a third switch.

4. The system as claimed in claim 3, wherein the DU system supplies power to the UPS by preparing an electrical circuit, and the DU system outputs a start enable signal to the permanent electrical circuit.

5. The system as claimed in claim 4, wherein the state of the DU system is adjusted according to the state of the vehicle, and the DU system includes the following states;