CN212323709U

CN212323709U - Power-down protection system of railway general controller

Info

Publication number: CN212323709U
Application number: CN202020313025.8U
Authority: CN
Inventors: 曾华鹏; 汤莉; 曹宝文; 王鹏; 俞飞; 彭伟; 刘伟
Original assignee: Tianjin Sino German University of Applied Sciences
Current assignee: Tianjin Sino German University of Applied Sciences
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2021-01-08
Anticipated expiration: 2030-03-13

Abstract

The utility model provides a power-down protection system of general controller of railway, including shell body and the electronic control board of setting inside the shell body, the outside of shell body is equipped with power supply terminal, three-phase electricity terminal, relay terminal, RS-485 interface, power lamp and status light, electronic control board includes STM32 singlechip, be connected with RS-485 communication circuit, relay drive circuit, LED drive circuit, three-phase electricity detection module and power switching electric capacity on the STM32 singlechip, be connected with on power switching electric capacity super capacitor and power switching module and the power switching module and be connected with power sampling module and STM32 singlechip and be connected. The utility model provides a pair of power-down protection system of general controller of railway detects the trouble of controller self key parts and takes the protection action, has improved the security.

Description

Power-down protection system of railway general controller

Technical Field

The utility model relates to a power-down protection system, in particular to power-down protection system of general controller of railway.

Background

With the continuous development of computer technology, the devices on the railway field become more and more intelligent. The original work of manually switching the tracks by a person is completed by related intelligent equipment. The intelligent equipment is widely applied to the railway site, so that on one hand, a large amount of manpower and material resources are saved, on the other hand, the intelligent degree is greatly improved, and the safety problem caused by human factors is eliminated, so that the reliability is improved.

The controller is a core component of intelligent equipment on a railway field, and generally consists of a core circuit and a peripheral circuit based on a single chip microcomputer. The controller detects related signals (such as sensors, switching value input and the like), and finally drives execution devices (such as relays, valves and the like) through calculation of related algorithms to achieve a control or protection result. However, the severe environment of the railway site (such as power grid fluctuation, high temperature, low temperature, vibration, moisture, etc.) may cause adverse effects on the controller and other equipment, leading to system function failure, and further causing serious safety problems. Among the various problems, it is common that the controller is powered abnormally (power down or voltage too low). When such a problem occurs, the controller is subject to complete failure (power failure) or abnormal operation (low voltage), which results in system shutdown and serious safety problems.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a power-down protection system of a railway general controller, which can detect the faults of key parts and take protection actions, thereby improving the safety; the external key components of the controller can be detected, and the reliability is improved.

In order to achieve the above object, the utility model adopts the following technical scheme:

a power-down protection system of a railway general controller comprises an outer shell and an electronic control panel arranged inside the outer shell, wherein a power supply terminal, a three-phase electric terminal, a relay terminal, an RS-485 interface, a power lamp and a state lamp are arranged on the outer side of the outer shell, the electronic control panel comprises an STM32 single chip microcomputer, an RS-485 communication circuit, a relay driving circuit, an LED driving circuit, a three-phase electric detection module and a power supply switching capacitor are connected onto the STM32 single chip microcomputer, a super capacitor and a power supply conversion module are connected onto the power supply switching capacitor, and a power supply sampling module is connected onto the power supply conversion module and connected with the STM32 single;

the terminal of the three-phase electric detection module is connected with a three-phase electric terminal, a wiring terminal of the relay driving circuit is connected with the relay terminal, a circuit of the POWER supply switching capacitor comprises a KBP210G rectifier and a TransBB transformer, a circuit L terminal and a circuit N terminal are arranged on the POWER supply switching capacitor and are connected with a single-phase 220V alternating current circuit, the single-phase 220V alternating current circuit is connected with a KBP210G rectifier after alternating current/direct current conversion and then connected with a TransBB transformer for converting voltage, and a POWER _ LOSS end of the TransBB transformer is connected to an AD input end of an STM32 single chip microcomputer.

As an improvement, the RS-485 communication circuit comprises a TD301D485 chip, the TXD end and the RXD end of the TD301D485 chip are respectively connected with a serial port sending and receiving pin of an STM32 single chip microcomputer, one IO port of the STM32 single chip microcomputer controls the TD301D485 chip through RS485 ENA, and the TD301D485 chip is connected with +3.3V for power supply.

As an improvement, the three-phase electric detection module includes two optical couplers TLP627-2, and the three-phase electric detection module is connected to a A, B, C phase of three-phase electric power through a J2 plug terminal, wherein

pins

1 and 2 of the optocoupler TLP627-2 are connected to an a phase,

pins

3 and 4 are connected to a B, C phase, and

pins

6 and 8 are output pins of the optocoupler and are connected to pins CHECK1 and CHECK2 of an STM32 singlechip.

As an improvement, the relay terminal is connected with an execution device such as a motor or an electromagnetic valve used for starting or stopping the external connection.

The utility model has the advantages that:

the utility model can detect the fault of the key part of the controller and take the protection action, thereby improving the safety; key components outside the controller can be detected, and reliability is improved; the super capacitor arranged in the controller ensures that the controller has enough time to take emergency protection action after the power supply is cut off, thereby improving the reliability; the key circuit of the controller adopts a redundancy design, so that the reliability of the product is improved; the reserved input/output port improves the expansibility of the product; the power supply lamp and the status lamp can indicate a certain type of fault, and fault diagnosis is facilitated for a user.

Drawings

FIG. 1 is a schematic structural diagram of an outer casing according to the present invention;

FIG. 2 is a schematic diagram of an electronic control board system according to the present invention;

FIG. 3 is a schematic circuit diagram of a power detection and switching module according to the present invention;

FIG. 4 is a power supply detection flow diagram of the present invention;

FIG. 5 is a flow chart of an anti-glitch filtering algorithm;

FIG. 6 is a schematic diagram of an RS-485 communication circuit of the present invention;

FIG. 7 is a timing diagram illustrating the communication according to the present invention;

FIG. 8 is a schematic diagram of a three-phase detection circuit of the present invention;

FIG. 9 is a schematic circuit diagram of a core control module of the single chip microcomputer according to the present invention;

reference symbol comparison table:

the device comprises a shell 1, a power supply terminal 2, a three-phase electric terminal 3, a relay terminal 4, an RS-485 interface 5, a power supply lamp 6 and a status lamp 7.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

In order to make the content of the present invention more clearly understood, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the attached drawings in the embodiment of the present invention.

As shown in fig. 1-9, a power-down protection system of a railway general controller comprises an outer shell 1 and an electronic control board arranged inside the outer shell 1, wherein a power supply terminal 2, a three-phase power terminal 3, a relay terminal 4 and an RS-485 interface 5 are arranged on the outer side of the outer shell 1, the electronic control board comprises an STM32 single chip microcomputer, the STM32 single chip microcomputer is connected with an RS-485 communication circuit, a relay driving circuit, an LED driving circuit, a three-phase power detection module and a power switching capacitor, the power switching capacitor is connected with a super capacitor and a power conversion module, and the power conversion module is connected with a power sampling module and connected with the STM32 single chip microcomputer;

the terminal of the three-phase electric detection module is connected with a three-phase electric terminal 3, a wiring terminal of the relay driving circuit is connected with a relay terminal 4, a circuit of the POWER supply switching capacitor comprises a KBP210G rectifier and a TransBB transformer, a circuit L terminal and a circuit N terminal of the POWER supply switching capacitor are connected with a single-phase 220V alternating current circuit, the single-phase 220V alternating current circuit is connected with a KBP210G rectifier after alternating current/direct current conversion and then connected with a TransBB transformer conversion voltage, and a POWER _ LOSS end of the TransBB transformer is connected to an AD input end of an STM32 single chip microcomputer.

Including the TD301D485 chip in the RS-485 communication circuit, the serial ports that the TXD and the RXD end of TD301D485 chip connect STM32 singlechip respectively send and receive the pin, an IO mouth of STM32 singlechip passes through RS485 ENA control TD301D485 chip, be connected with +3.3V on the TD301D485 chip and supply power.

The three-phase electric detection module comprises two paths of optical couplers TLP627-2, the three-phase electric detection module is connected to a A, B, C phase of three-phase electricity through a J2 plug terminal,

pins

1 and 2 of an optocoupler TLP627-2 are connected to an A phase,

pins

3 and 4 are connected to a B, C phase, and

output pins

6 and 8 of the optocoupler are connected to CHECK1 pins and CHECK2 pins of an STM32 singlechip.

The relay terminal 4 is connected to an external actuator such as a motor or a solenoid valve for starting or stopping.

The outer shell 1 is provided with a power lamp 6 and a status lamp 7.

In the device use, the device is realized based on the STM32 singlechip, and the STM32 singlechip can detect self supply voltage to judge self power supply state, in case detect the power supply unusual, then automatic switch to stand-by power supply work (super capacitor), carry out emergency simultaneously and handle (if break relevant relay), save necessary information and report to the police. The STM32 single chip microcomputer is connected with a three-phase detection terminal, so that whether the railway three-phase electric equipment is in phase failure or not can be identified; the power supply conversion module can convert a 220V power supply into voltage required by the controller; the power supply sampling module can sample the input power supply and detect whether the power supply is abnormal or not; the power supply switching module is used for switching the power supply of the controller to the super capacitor once the power supply is abnormal; the relay output terminal can control peripheral equipment; the communication terminal can send the information of power supply abnormity to the main equipment or the server based on the interface of RS-485; a super capacitor is integrated in the controller, and when the power supply of the controller is disconnected, the super capacitor can supply power to enable the controller to complete emergency protection actions.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A power-down protection system of a railway general controller comprises an outer shell (1) and an electronic control panel arranged inside the outer shell (1), and is characterized in that a power supply terminal (2), a three-phase terminal (3), a relay terminal (4) and an RS-485 interface (5) are arranged on the outer side of the outer shell (1), the electronic control panel comprises an STM32 single chip microcomputer, an RS-485 communication circuit, a relay driving circuit, an LED driving circuit, a three-phase electric detection module and a power supply switching capacitor are connected onto the STM32 single chip microcomputer, a super capacitor and a power supply conversion module are connected onto the power supply switching capacitor, and a power supply sampling module is connected onto the power supply conversion module and connected with the STM32 single chip microcomputer;

the terminal of the three-phase electric detection module is connected with a three-phase electric terminal (3), a wiring terminal of the relay driving circuit is connected with a relay terminal (4), a circuit of the POWER supply switching capacitor comprises a KBP210G rectifier and a TransBB transformer, a circuit L terminal and a circuit N terminal of the POWER supply switching capacitor are connected with a single-phase 220V alternating current circuit, the single-phase 220V alternating current circuit is connected with a KBP210G rectifier after alternating current/direct current conversion and then connected with a TransBB transformer conversion voltage, and a POWER _ LOSS end of the TransBB transformer is connected to an AD input end of an STM32 single chip microcomputer.

2. The system for power down protection of a railway general purpose controller as claimed in claim 1, wherein: including the TD301D485 chip in the RS-485 communication circuit, the serial ports that the TXD and the RXD end of TD301D485 chip connect STM32 singlechip respectively send and receive the pin, an IO mouth of STM32 singlechip passes through RS485 ENA control TD301D485 chip, be connected with +3.3V on the TD301D485 chip and supply power.

3. The system for power down protection of a railway general purpose controller as claimed in claim 1, wherein: the three-phase electric detection module comprises two paths of optical couplers TLP627-2, the three-phase electric detection module is connected to a A, B, C phase of three-phase electricity through a J2 plug terminal, pins 1 and 2 of an optocoupler TLP627-2 are connected to an A phase, pins 3 and 4 are connected to a B, C phase, and output pins 6 and 8 of the optocoupler are connected to CHECK1 pins and CHECK2 pins of an STM32 singlechip.

4. The system for power down protection of a railway general purpose controller as claimed in claim 1, wherein: the relay terminal (4) is connected with an external execution device such as a motor or an electromagnetic valve for starting or stopping.

5. The system for power down protection of a railway general purpose controller as claimed in claim 1, wherein: the shell body (1) is provided with a power lamp (6) and a status lamp (7).