RU2347277C2 - Repeater activation key - Google Patents

Abstract

FIELD: physics; communication.

SUBSTANCE: invention concerns to safety precautions means for railway transportation and can be used for provision of a passenger train with the wireless address signal system and interior communication. The key of repeater activation contains microprocessor, two diodes, condenser, resistors. The condenser which is carrying out a filtration of the feeding voltage is connected to an inlet of a food of the microprocessor. The diodes are connected parallel to the information and synchronising inlet/exit of the microprocessor with possibility of realisation of their protection against overstraining. Resistors are connected to not used inlets of the microprocessor. The microprocessor exit is executed with connection possibility to a repeater and got through a current circuit from an optron and one of resistors on a voltage of a food with maintenance of a galvanic outcome of an exit and a repeater.

EFFECT: provision of a passenger train with the wireless address signal system and interior communication.

1 dwg

Description

The invention relates to the field of railway transport, and in particular to the field of railway safety equipment, and can be used to provide a passenger train with a wireless address emergency alarm and intercom.

This development is intended for use in communication systems on passenger trains of commuter and long-distance for the purpose of organizing communication channels and transmitting alarm signals. The device was developed on the basis of DECT technologies and allows equipping passenger trains with data and telephony devices, preferably taking into account the existing system of flexible formation of the composition of the passenger train, consisting of headquarters and passenger cars.

Known (patent RU 2206177, Н04В 7/26, 2003), an on-board communication network of rolling stock, characterized by the presence of a control and diagnostics panel (wearable console of the head of the train), in each carriage of rolling stock terminal devices (in the form of mobile radiotelephones for staff and passengers, radio sensors and executive devices of the car automation system, miniature video surveillance terminals and other necessary devices), a unified switching unit (in the form of a base station), a digital radio link connecting the onboard communication network and rolling stock with external communication systems, and the connection between the communication terminal devices and the unified communication node, as well as between adjacent unified switching nodes is carried out over the radio channel, while the frequency range and level of the radio signal in the radio channel are selected so that the communication terminal devices only communicate with unified switching unit of the car in which the communication terminal devices are located at the moment, and the control and diagnostic panel is made mobile and communication It is connected via a radio channel with a unified switching unit of the car in which the control and diagnostic panel is currently located.

Known on-board communication network operates as follows.

The control and diagnostic panel (wearable terminal of the train chief) transmits and receives the radio signal at any point of the train through a network of unified switching nodes both when the train head receives the radio signal from the terminal device, and when transmitting the radio signal to the terminal device, including when the passenger speaks via personal mobile phone with a subscriber remote from the train.

A disadvantage of the known on-board system should be recognized as the presence of only one control panel and diagnostics made in the form of a wearable version of the train head, a large number of switching nodes. In addition, the lack of the ability to automatically monitor the condition of the car, especially when replacing the cars included in the passenger train, i.e. the existing system of flexible composition formation.

Also known (patent RU 0046895, 2005) is a passenger train safety and communication control system characterized by the presence of a central control system and DECT base stations, with each base station connected to a central control system, and two antennas connected to each DECT base station via RF connectors installed on the roof of the carriage of at least one alarm transmission device from the railway car alarm systems by generating voice messages for transmission to the conductor the agon and the head of the train, including the DECT radio socket, a voice auto-informant, a portable terminal with a push-button dialer, while the alarm transmission device is connected to the outputs of the car’s emergency and fire alarm systems, at least one portable conductor terminal for receiving signals about accidents and two-way automatic telephone communication , at least one repeater for amplifying radio signals, at least one handset in the service compartment of the conductors, and at least one alarm button and.

The repeater used in the system is designed to organize the radio access zone of wearable subscriber terminals (wearable phones) within a separate passenger carriage with subsequent transmission of information to the DECT base stations of the system. The repeater is usually connected with an RF cable with a wave impedance of 50 Ohms to an RF signal splitter. Each repeater has a high-frequency connector for connecting to an external antenna and a connector for connecting to a 12 V power supply.

A disadvantage of the well-known security and communication control system of a passenger train is the impossibility of its use, subject to the flexible formation of the train, i.e. replacement of cars included in the passenger train.

The technical problem solved by the proposed invention is to develop an improved alarm system and communication of a passenger train.

The technical result obtained by the implementation of the proposed system is to increase the safety of operation of a passenger train while increasing the level of service in a flexible formation of the composition of a passenger train.

To achieve the specified technical result, it is proposed to use a repeater in the specified security and communication control system of the passenger train, which includes an activation key.

The specified repeater activation key is a radio electronic device made in the form of a micro-component assembly with the ability to connect to a repeater that provides two-way automatic telephone communication between the wagon conductor and the train head, as well as with the conductors of other wagons.

The indicated activation key of the repeater (see the drawing) contains a printed circuit board with a microprocessor (IC1) installed on it, an interface circuit for connecting to the repeater and to the ECR (the electronic registration key is also known as KPT - the memory key for the terminal subscriber radio unit), as well as auxiliary the elements are a capacitor (C1), 2 BAV99 diodes, 6 resistors (R1, ..., R6), 1 optocoupler (OKI), while a highly stabilized supply voltage of 3.3 V is connected to the VCC input of IC1 (microprocessor), and also C1, filtering the supply voltage. Diodes are connected in parallel to the information (SDA) and synchronizing (SCL) input / output IC1, they provide overvoltage protection for the SDA and SCL inputs. R1, R2, R3, R5, R6 are connected to the unused inputs of IC1 and are terminators (protective loads of unused inputs). The control output TXD of microprocessor IC1 is configured to connect to a repeater to notify it of the start of transmission of registration data. TXD is connected to the serial circuit of the optocoupler OK1, R4 and the supply voltage is 3.3 V. This circuit is designed for galvanic isolation of TXD and Repeater.

To exchange data between the repeater activation key and the repeater, use the serial port interface with the following protocol parameters:

Data range 0 ... 255 Transmission mode asynchronous Word length 8 bit Transmission speed 1900 bps

The developed device provides reception and recording in the repeater memory of information about the addressee to whom the alarm signals are sent.

The developed activator key has the following technical characteristics:

- electrical characteristics:

Supply voltage 3.3 (continuous) V Working memory 512 kB

- mechanical parameters:

Operating temperature range 0-45 ° C Storage temperature range -50 - + 50 ° С

The repeater activation key is made in the form of a printed circuit board on which an interface microcircuit and auxiliary elements are installed to ensure the operability of the repeater activation key.

The developed repeater activation key is designed to work as part of a communication system and transmit emergency messages of passenger long-distance and commuter trains. The specified security and communication control system for a passenger train consists of two types of functional parts - central and terminal. The central part is located in the staff carriage and represents the central control system (DECT radio controller) with the base stations connected to it. Also in the head car are means for displaying emergency situations occurring in the train, and train signaling systems. The end parts of the system are located in passenger cars (and, possibly, in the locomotive’s cabin) and are devices for collecting and transmitting alarm messages from emergency sensors of the car (and locomotive) via organized radio channels to the central part of the system (terminal subscriber radio unit). The repeater is also part of the terminal block of the system and is responsible for organizing the local radio access zone of user terminals carried by the conductors within a separate passenger car (and locomotive) and transmitting information to the central part of the system.

The subscriber terminal worn by the conductors is configured to receive information determining which radio head controller it will work with.

The terminal worn by the conductors, to the repeater of which the developed key is connected, is able to record identification data characterizing to which car the given wearable terminal is assigned to. This ensures a clear receipt by the radio controller of the headquarters car of emergency information in a specific car that is part of the train.

The repeater activation key is used to temporarily store registration information intended to activate the repeater with subsequent translation of this information into the repeater. Registration information is transmitted to the repeater activation key from the key of the terminal subscriber radio unit. In the current version of the software, the following registration information parameters are entered into the repeater:

- rpn (RPN of the base with which the repeater can synchronize) = 000 ... 255

- rnr (RPN repeater) = 000 ... 255

- mba (range of base stations for repeater synchronization) = 0 ... 8

- rjp (maximum number of repeaters in which a handover can be implemented) = 0 ... 3

- byb (maximum number of talk channels provided by the repeater) = 1 ... 3

The repeater programming procedure is activated after power is supplied to the key, provided that the repeater information is entered into the key of the terminal subscriber radio unit. Also, the initialization procedure is activated at the moment the repeater is connected, which allows you to initialize the repeater at any time. When installing a new key, the repeater will receive the changed identification information corresponding to the system recorded in the new key.

The key of the terminal subscriber radio unit is used to identify terminal devices in the system, which allows you to bind the carriage devices to the head system located in the headquarters carriage. Any car of any railway can be attached to any staff car, as well as to any depot system.

For programming keys and creating backups, two additional devices are used. The first is for key programming, the second for creating backups on a personal computer. The devices have a junction for connecting a personal computer, and all registration procedures are activated from a PC.

A device for programming keys constructively consists of a terminal subscriber radio unit, a device for interfacing with a portable terminal, which includes a repeater, an analog telephone line interface designed to connect a telephone or modem. The mobile phone must also be included in the installation kit, the number of which is equal to the number of keys in the staff car. The procedures for registering and writing identification information into a key can be activated from a telephone set that is in tone dialing mode, or from an analog modem connected to a personal computer. The procedure for registering a tube is activated directly from the tube according to the instruction manual.

Using the developed repeater key allows you to use the known system in conditions of flexible formation of rolling stock.

Claims (1)

The repeater activation key, characterized by the presence of microprocessor IC1, two BAV99 diodes, capacitor C1, resistors R1 ... R6, moreover, a highly-stabilized supply voltage 3.3 V, as well as capacitor C1, filtering the supply voltage, are connected to the VCC input of the microprocessor IC1 , diodes D2 and D3 are connected in parallel to the information and synchronization input / output SDA and SCL of microprocessor IC1 with the ability to protect them from overvoltage, resistors R1, R2, R3, R5, R6 are connected to unused inputs of the microprocessor IC1, the TXD output of microprocessor IC1 is configured to be connected to a repeater, while the TXD output is connected via a serial circuit from an OKI optocoupler and a resistor R4 to a 3.3 V supply voltage with galvanic isolation of the TXD output and the repeater.