CN113622784A

CN113622784A - Shielding door controller

Info

Publication number: CN113622784A
Application number: CN202010378735.3A
Authority: CN
Inventors: 董磊; 肖庆林; 卢泽泉; 袁钧; 杨鹏; 陈超
Original assignee: Electromechanical Branch Beijing Metro Operation Co ltd; Beijing Jing Rui Rui Mechanical And Electrical Equipment Co ltd
Current assignee: Electromechanical Branch Beijing Metro Operation Co ltd; Beijing Jing Rui Rui Mechanical And Electrical Equipment Co ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2021-11-09

Abstract

The invention discloses a shield door controller, which comprises a single chip microcomputer 1, a single chip microcomputer 2, a logic control circuit, a solid state relay arc extinguishing circuit, a receiving relay group, a train automatic control system, a platform single side unit door, a mechanical relay driving circuit and a redundant power supply, wherein the single chip microcomputer 2 is connected with the logic control circuit; the system comprises a single chip microcomputer 1, a single chip microcomputer 2, a logic control circuit, a solid-state relay arc extinguishing circuit, a mechanical relay driving circuit, a receiving relay group and a train automatic control system (ATC), wherein the single chip microcomputer 1 and the single chip microcomputer 2 are connected, the logic control circuit is respectively connected with the single chip microcomputer 1 and the single chip microcomputer 2, the solid-state relay arc extinguishing circuit is connected with the logic control circuit and is connected with a single-side unit door of a platform, the mechanical relay driving circuit is connected with the logic control circuit and is connected with the single-side unit door of the platform through the solid-state relay arc extinguishing circuit, and the receiving relay group is respectively connected with the automatic train control system (ATC), the single chip microcomputer 1 and the single chip microcomputer 2; the redundant power supply is respectively connected with the single chip microcomputer 1 and the single chip microcomputer 2. And an integrated circuit is adopted in the logic control part to replace the relay control so as to improve the safety.

Description

Shielding door controller

Technical Field

The embodiment of the invention relates to the technical field of shield door systems, in particular to a shield door controller.

Background

With the rapid development of urban rail transit, more and more subway lines adopt a shielded door system. From the perspective of safety, the contact between a platform waiting passenger and a track is isolated by the shielding door, the situation that the passenger falls off a rail running area due to crowding is avoided, and the personal safety of the passenger is guaranteed. Secondly, the shielding door avoids the influence of subway piston wind on the platform temperature, improves the utilization rate of the station air conditioner and plays a role in saving energy; meanwhile, the noise generated when the train enters and exits the station can be reduced to the maximum extent, and the waiting environment of passengers is improved.

The application of the screen door system brings convenience, but in case of failure, the safety of passengers and the operation of trains are greatly influenced. The conventional shielding door controllers (hereinafter referred to as conventional PEDC) in the market all adopt a relay passive switch (relay dry contact) to receive subway number commands, logically control and drive output of opening/closing door. This early design suffered from several drawbacks such as poor safety, stability, low life, poor scalability, etc. With the vigorous development of modern rail transit, the subway passenger flow is increased day by day, the use frequency of a station shield door is increased gradually, the phenomena of high fault rate and poor stability are easy to occur after the traditional PEDC equipment is operated for a long time and for a high frequency, a light person causes inconvenience for the trip of a customer, and the normal operation of the whole subway line is seriously influenced.

Referring to fig. 1, for a traditional PEDC driving logic circuit, the internal control logic operation of the traditional PEDC is realized by means of linkage of 15 mechanical relays, because the mechanical relays have low working frequency, the opening and closing actions of contacts are generally in the order of tens of milliseconds, and the mechanical contacts of the relays can also shake at the opening/closing moment, and in the operation process, malfunction is easily formed due to reaction lag of a certain relay and shaking of the mechanical contacts, so that the opening/closing of a station shielding door is abnormal, and the normal operation of the shielding door system is influenced. PEDC is directly outputted by a relay passive switch (a dry contact) at a drive output part, that is, an opening/closing command signal and an enable power supply signal sent to a station shield door are directly connected to a load through a mechanical contact of the relay. The electromagnetic lock 'lifting cable' (releasing the mechanical lock of the door when opening the door) action of a single platform unit door requires at least 240mA instantaneous current, and 6 enabling driving units integrated by a single PEDC need to drive 40 unit doors simultaneously, and each driving unit bears 1.6A current on average. The electromagnetic lock coil belongs to inductive load, and the mechanical contacts of the relay often cause arcing discharge among the contacts at the opening/closing moment, organic matters contained in the discharge decomposed gas can cause the contacts to generate black oxides, and poor contact can be caused due to the adhesion of the oxides when electric shock occurs. In addition, the metal of the contact can rust by combining with nitrogen and water (moisture) in the air in the discharging process, the oxidation and rusting phenomena become more serious along with the increase of the service life of the equipment, the service life of the equipment is shortened, and finally the equipment is failed or even scrapped. The relay control system is realized by adopting hardware wiring, a control logic is formed by combining series connection or parallel connection of mechanical contacts of the relay, hysteresis action of a delay circuit and the like, the connection is more and complicated, the function is difficult to change or increase after the system is formed, the flexibility and the expandability are limited, and the relay is used as a power device and can bring extra burden to a power supply system. Based on the defects of the traditional PEDC, the traditional PEDC has the problems of high failure rate, frequent misoperation and short service life of equipment which cannot meet the design requirement.

Disclosure of Invention

Therefore, the invention provides a novel shielding door controller, which aims to solve the problems of poor safety, poor stability, low service life, poor expandability and the like caused by the defects of the circuit design of logic control and opening/closing door driving output because the early shielding door controller adopts a relay passive switch to receive a subway number passing command in the prior art.

In order to achieve the purpose, the design scheme of the invention adopts the integrated circuit to replace the traditional mechanical relay to carry out control logic operation, ensures that the control signal is safer and more reliable, and simultaneously, the arc extinguishing circuit is added on the relay output loop to realize arc extinguishing on the relay contact, protect the relay contact and prolong the service life of equipment.

The specific technical scheme is as follows:

the invention provides a novel shielding door controller which is characterized by comprising a single chip microcomputer 1, a single chip microcomputer 2, a logic control circuit, a solid-state relay arc extinguishing circuit, a receiving relay group, a train automatic control system, a platform single-side unit door, a mechanical relay driving loop and a redundant power supply, wherein the single chip microcomputer is connected with the receiving relay group through a bus; the system comprises a single chip microcomputer 1, a logic control circuit, a solid-state relay arc extinguishing circuit, a mechanical relay driving circuit, a receiving relay group and a train automatic control system (ATC), wherein the single chip microcomputer 1 is connected with the single chip microcomputer 2, the logic control circuit is respectively connected with the single chip microcomputer 1 and the single chip microcomputer 2, the solid-state relay arc extinguishing circuit is connected with the logic control circuit and is connected with a platform single-side unit door, the mechanical relay driving circuit is connected with the logic control circuit and is connected with the platform single-side unit door through the solid-state relay arc extinguishing circuit, and the receiving relay group is respectively connected with the train automatic control system (ATC), the single chip microcomputer 1 and the single chip microcomputer 2; and the redundant power supply is respectively connected with the singlechip 1 and the singlechip 2.

Further, the single chip microcomputer 1 and the single chip microcomputer 2 adopt an automobile-grade chip S9KEAZ 128A.

Further, the mechanical relay is an HDZ-468 relay produced by henschel, germany.

The embodiment of the invention has the following advantages:

the invention adopts an integrated circuit to replace the relay control in the logic control part to improve the safety. And a solid-state relay arc extinguishing circuit is added in a driving output loop to reduce the failure rate of equipment, so that the service life of the controller is prolonged.

The mechanical relay of the novel PEDC integrated circuit is an HDZ-468 series relay produced by Henry Hairman in Germany, and the mechanical service life of the relay is more than 10^7 cycles according to a component data manual, and the electrical service life is more than 10^6 cycles when no sudden change current load exists outside. By taking Shanghai No. 1 line with large passenger flow and high train shift frequency as an example, the Shanghai No. 1 line enables and disables the train to enter and exit from the station in 270 shifts all day and 98550 shifts all year, so that the analysis can be carried out, on the premise of eliminating external factors, the novel PEDC can at least ensure that the fault cannot occur in the first 10 years of the use, and the service life can be further prolonged if the maintenance is proper. This has greatly exceeded the recommended service life of industrial electronic equipment. After the invention is successfully developed, 4 prototype machines are produced, 500000 times of on-site operation of the station is simulated on the shield door prototype machine, and the station is put into actual operation for 13 months without faults and faulty actions. The theory and practice prove that the novel PEDC can completely replace the traditional PEDC, and has lower failure rate and higher reliability.

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 structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a diagram of a conventional PEDC driver logic circuit;

FIG. 2 is a circuit diagram of a novel shielded gate controller provided by the present invention;

FIG. 3 is a logic flow diagram of the operation of the novel shield door controller provided by the present invention;

FIG. 4 is a single chip microcomputer control circuit provided by the present invention;

fig. 5 is an arc extinguishing circuit of the solid-state relay provided by the invention.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2, a circuit diagram of the novel shielded gate controller provided by the invention comprises a single chip microcomputer 1, a single chip microcomputer 2, a logic control circuit, a solid-state relay arc extinguishing circuit, a receiving relay group, a train automatic control system, a platform single-side unit door, a mechanical relay driving loop and a redundant power supply; the system comprises a single chip microcomputer 1, a logic control circuit, a solid-state relay arc extinguishing circuit, a mechanical relay driving circuit, a receiving relay group and a train automatic control system (ATC), wherein the single chip microcomputer 1 is connected with the single chip microcomputer 2, the logic control circuit is respectively connected with the single chip microcomputer 1 and the single chip microcomputer 2, the solid-state relay arc extinguishing circuit is connected with the logic control circuit and is connected with a platform single-side unit door, the mechanical relay driving circuit is connected with the logic control circuit and is connected with the platform single-side unit door through the solid-state relay arc extinguishing circuit, and the receiving relay group is respectively connected with the train automatic control system (ATC), the single chip microcomputer 1 and the single chip microcomputer 2; and the redundant power supply is respectively connected with the singlechip 1 and the singlechip 2.

Further, preferably, the relay adopts an HDZ-468 series relay produced by Henshele in Germany, and the singlechip 1 and the singlechip 2 adopt automobile-grade chips S9KEAZ 128A; the mechanical relay adopts an HDZ-468 relay produced by Henshele in Germany.

Referring to fig. 3, it is a flow chart of the operation logic of the screen door controller provided in the present invention. In the operation process of the equipment, when an opening/closing command sent by an ATC (automatic transfer control) is received, the command is simultaneously sent to the single chip microcomputer 1 and the single chip microcomputer 2 through a receiving relay group and a signal acquisition circuit, an operation result is given after the logic operation of the two single chip microcomputers, and after the comparison operation result of the circuits is judged to be consistent through a logic control circuit, a mechanical relay driving circuit and a solid state relay arc extinguishing circuit are sequentially driven to output a control command to a single-side platform DCU (digital control unit) so as to control the opening/closing of the shielding door.

Referring to fig. 4, the single chip microcomputer circuit provided by the invention adopts a dual-redundancy single chip microcomputer for logic control, and the single chip microcomputer adopts an automobile-grade S9KEAZ128A chip as a main control single chip microcomputer. After the system is powered on, the single chip microcomputer system starts to work, and the single chip microcomputers SWD _ DIO and SWD _ CLK are signal lines of a burner and are responsible for burning and simulation debugging of a single chip microcomputer program; the RESET signal is a RESET signal of the singlechip and is externally connected with a standard resistance-capacitance RESET circuit. The single chip microcomputer adopts an 8M clock crystal oscillator as a clock. The INPUT pins 1-10 are INPUT signal pins and are responsible for acquiring door opening, door closing and locking signal closing commands sent by a shield door signal system (ATC) and reading control feedback signals. OUTPUT 1-9 are OUTPUT signal pins and are responsible for driving arc extinguishing solid-state relays, mechanical relays and double single-chip microcomputer synchronous pulse signal OUTPUT. The whole single chip microcomputer system adopts 5V power supply and is powered by isolation voltage stabilization voltage.

Referring to fig. 5, the invention provides a solid-state relay arc extinguishing circuit. Solid-state relay arc extinguishing circuit is the arc extinguishing circuit who is given first place to solid-state relay, and the solid-state relay model is that Crydom produces: CX240D5R, the control voltage is 3-15 VDC, and the load voltage is 12-280 VAC. The maximum load current 5A.

The invention integrates 6 paths of solid relay arc extinguishing circuits, and one path of the 'enabling signal arc extinguishing circuit' is taken at present for explanation in order to explain the working principle of the circuit.

As shown in fig. 5, after the system is put into use, when an opening/closing command comes, "input power enable L1", is firstly loaded on the normally

open contacts

7 and 8 of the mechanical relay U77, and when the system determines that an opening/closing enable signal needs to be output through logic operation, the single chip microcomputer firstly controls the mechanical relays U77, U78 and U76 to be attracted, and after the contacts of the safety relay are completely closed. At this time, an input power enable L1 signal is loaded to the PORT1 end of the solid-state relay, after a specific delay time (accurate delay time is calculated according to an electrical principle), the single chip microcomputer drives the solid-state relay to be opened through the CONTROL1 and the CONTROL2, and an input power enable L1 signal is output through the solid-state relay to form an output enable power L1 to drive the DCU to open/close the door. Similarly, when the door opening/closing command is finished, the single chip microcomputer drives the solid-state relay to close through the CONTROL1 and the CONTROL2, the load connection is disconnected, and after a specific delay time, the attraction state of the mechanical relays U77, U78 and U76 is released.

The logic control part of the circuit of the invention is realized by an integrated circuit, the logic control of the integrated circuit is stronger than the logic safety of a mechanical relay, and meanwhile, the safety is further strengthened by adopting a multiplexing technology, wherein:

the power supply part adopts a double-path redundant power supply for supplying power and is divided into a main power supply and a standby power supply, once the main power supply fails, the main power supply can be automatically switched to the standby power supply, and the work of the single chip microcomputer is not influenced.

The control part adopts the multiplexing control of the dual-redundancy singlechip, and only when the logical operation results of the master singlechip and the slave singlechip are completely the same, the command can be executed, so that the logical operation error caused by the fault of a single singlechip is prevented. Meanwhile, a pulse synchronization technology is adopted in a drive logic control part circuit, and misoperation caused by peripheral signal interference is prevented. The invention adds an arc extinguishing circuit which takes a solid relay as a core at a drive output part. The solid relay has no mechanical component, fast sucking speed, long service life and no noise in operation. The interior of the device is composed of bidirectional thyristors, no contact point, no electric arc, no spark, safety and reliability.

When the drive is output, the singlechip firstly controls the mechanical relay to switch on the contact, and after the contact of the mechanical relay is completely switched on, the solid-state relay is switched on to drive and output.

According to the working principle, the novel PEDC can effectively solve the problems of oxidation and damage of the contact of the traditional PEDC relay. The failure rate of the equipment can be obviously reduced, and the service life of the equipment is prolonged.

The invention adopts the singlechip to replace the relay to realize logic control, theoretically, as long as the storage space is enough, the control logic number of the singlechip can be infinitely expanded, the change and the expansion of the control logic can be realized only by changing the refreshing software without changing a hardware circuit, the invention can flexibly adjust according to the practical application requirements of users, the singlechip is composed of a medium-large scale integrated circuit, the power is low, and no extra burden is brought to a power supply system.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A shield door controller is characterized by comprising a single chip microcomputer 1, a single chip microcomputer 2, a logic control circuit, a solid state relay arc extinguishing circuit, a receiving relay group, a train automatic control system, a platform single-side unit door, a mechanical relay driving circuit and a redundant power supply; the system comprises a single chip microcomputer 1, a logic control circuit, a solid-state relay arc extinguishing circuit, a mechanical relay driving circuit, a receiving relay group and a train automatic control system (ATC), wherein the single chip microcomputer 1 is connected with the single chip microcomputer 2, the logic control circuit is respectively connected with the single chip microcomputer 1 and the single chip microcomputer 2, the solid-state relay arc extinguishing circuit is connected with the logic control circuit and is connected with a platform single-side unit door, the mechanical relay driving circuit is connected with the logic control circuit and is connected with the platform single-side unit door through the solid-state relay arc extinguishing circuit, and the receiving relay group is respectively connected with the train automatic control system (ATC), the single chip microcomputer 1 and the single chip microcomputer 2; and the redundant power supply is respectively connected with the singlechip 1 and the singlechip 2.

2. The controller according to claim 1, wherein the single chip microcomputer 1 and the single chip microcomputer 2 adopt a chip S9KEAZ128A of automobile grade.

3. The controller of claim 1, wherein the mechanical relay is an HDZ-468 relay manufactured by henschel, germany.