RU72594U1 - DIGITAL SYSTEM OF REMOTE CONTROL AND MANAGEMENT OF REMOTE OBJECTS - Google Patents

Abstract

The utility model relates to the field of data transmission systems for remote monitoring and control of remote objects using TETRA standard equipment and Ethernet network facilities. A digital system for remote monitoring and control of remote objects operating in the Ethernet network and using TETRA standard radio stations includes a personal computer with appropriate software connected to a local controller, a remote controller connected to a central radio station, and radio controllers associated with object radio stations. Local and remote controllers are interconnected via a 10Base-T electrical interface using TCP / IP protocols, and a personal computer and a local controller, a remote controller and a central radio station, radio controllers and object radio stations are respectively connected via the RS232 interface. The local controller has a volume control, connectors for connecting the tangent, microphone, loudspeaker, RJ-45 for the 10Base-T electrical interface and the RS232 port. Remote controller 3 has 12 lines for connecting sensors and actuators, connectors for connecting audio signals, RJ-45 for 10Base-T electrical interface and two RS232 ports. Each of their radio controllers has 12 lines for connecting sensors and actuators and two RS232 ports. The technical result to which this utility model is directed is to simplify the design of the device while maintaining its functionality.

Description

The utility model relates to the field of data transmission systems for remote monitoring and control of remote objects using TETRA standard equipment and Ethernet network facilities. The digital system for remote monitoring and control of remote objects operating in the Ethernet network is developed on the basis of the latest achievements of microprocessor technology and is a universal solution both for controlling TETRA standard radio stations installed at a considerable distance from the dispatcher’s workstation and for transmitting data and remote monitoring and control of remote objects using a radio controller.

The well-known digital systems Sirus DRC-500, M-160 require a mandatory twisted pair cable between the control panel and the remote controller for communication, in addition, these systems working in their standard do not have the ability to transmit and receive data from other radio stations and, most importantly, the remote control the controls do not possess the information content so necessary for the dispatcher. That is, incoming and outgoing calls are not recorded and not memorized by date and time, received data from sensors connected to the controllers is not archived.

The closest analogue of the claimed utility model is a digital system for remote monitoring and control of remote objects operating on an Ethernet network and using TETRA standard radio stations, including a computer (PC), appropriate software connected to a local controller, and a remote controller connected to a central radio station at least one radio controller associated with at least one

object radio station (WO 2004023830). In this system, the TETRA standard base station with Ethernet architecture is designed as a repeater of the BSR base station. Communication between the BSR and other system devices is done through Ethernet handlers. The physical Ethernet handler acts as an I / O to facilitate communication with the BSR; The TETRA layer is organized within the BSR using 32-bit RISC processors included in the BSR; and internal synchronization for each BSR is based on a synchronization system with an external GPS signal within the BSR. This system has wide functional capabilities, in particular, it can provide the organization of a dispatcher's place in any office of a settlement. And the application as a control panel of a computer and the corresponding interface developed for it, to obtain sufficient information, to record all calls by date and time, including subscriber numbers, data acquisition and archiving. In the case of using pop-ups accompanied by sound signals after receiving a call or an alarm message, the dispatcher was given the opportunity to quickly respond to the event. However, this system has a complex configuration, which ultimately complicates its implementation and reduces the reliability of its operation.

The technical result to which this utility model is directed is to simplify the design of the device while maintaining its functionality. The technical result is achieved by the fact that in a digital system for remote monitoring and control of remote objects operating in the Ethernet network and using TETRA standard radio stations, including a personal computer with appropriate software connected to the local controller, a remote controller connected to the central radio station at least one radio controller associated with at least one object radio station,

characterized in that the local and remote controllers are interconnected via a 10Base-T electrical interface using TCP / IP protocols, and the personal computer and local controller, remote controller and central radio station, radio controller and object radio station, respectively, are interconnected via the RS232 interface.

The remote controller is configured to collect analog data from object radios.

A microphone, speaker and computer are connected to the local controller.

Figure 1 shows a diagram of a telecommunications network in which the claimed digital system for remote monitoring and control of remote objects is used.

Figure 2 shows the interaction diagram of a TETRA standard radio station with an Ethernet controller.

Figure 3 shows a diagram of the formation of all levels.

A digital system for remote monitoring and control of remote objects operating in the Ethernet network and using TETRA standard radio stations includes a personal computer 1 with the appropriate software connected to a local controller 2, a remote controller 3 connected to a central radio station 4, and 5.1 radio controllers .. .5.n associated with the object radio stations 6.1 ... 6.n .. The local and remote controllers 2 and 3 are interconnected via the 10Base-T electrical interface using TCP / IP protocols, and the personnel computer 1 and local controller 2, remote controller 3 and central radio station 4, radio controllers 5.1 ... 5.n and object radio stations 6.1 ... 6.n, respectively, are connected via the RS232 interface.

Local controller 2 has a volume control, connectors for connecting the tangent, microphone, speaker, RJ-45 - for

10Base-T electrical interface and RS232 port. Remote controller 3 has 12 lines for connecting sensors and actuators, connectors for connecting audio signals, RJ-45 for 10Base-T electrical interface and two RS232 ports.

Each of their 5.1 ... 5.n radio controllers has 12 lines for connecting sensors and actuators and two RS232 ports.

The system is able to convert: an analog audio signal, data coming from an RS232 serial port, from an analog to a digital converter, signals from input ports, data to an Ethernet environment and, conversely, from an Ethernet environment, convert to an analog audio signal, data to an RS232 port, signals control data in the digital port - analog converter. The interface specially developed for the dispatcher made it possible to organize group and individual calls, send and receive SDS and status messages, and transmit control signals. Change the operating mode of the radio station from duplex to simplex and vice versa, display the telealarm data on the corresponding window, program the main parameters of all controllers, and constantly monitor the Ethernet network performance. In turn, a radio controller connected to a TETRA standard radio station through the RS232 serial port is able to receive and transmit data through the second RS232 port, transmit signals from input ports, and output control signals.

Conversion is as follows. The stream of output data is valid through the RS232 port from the radio station of Fig. 3 comes to the microprocessor and to the TCP software module (Transmission Control Protocol - transmission control protocol).

The TCP module provides a connection-oriented, reliable byte exchange service for data streams. Connection-oriented service means that the local and remote controllers of FIG. 3 must

start the exchange of data to establish a connection between themselves. Reliable service is provided in TCP on the basis of information documents RFC (Request for Comment) - 793. At the beginning, the TCP software module, if necessary, splits the data stream into segments. When a segment is sent, the TCP module starts the timer and waits for acknowledgment from the receiving side in the form of a receipt. If confirmation does not arrive at the allotted time (timeout) time, the sending of the segment is repeated, that is, retransmission is performed. After receiving the calculation segment and checking the checksum (checksum), the TCP module on the remote controller generates a confirmation (acknowledgment - ACK). If the segment checksum calculated at the reception does not coincide with that recorded in its header, then the segment is discarded and confirmation of its receipt is not sent (it is assumed that the TCP module of the local controller of Fig. 3 will repeat the sending of this segment by timeout). Since TCP segments are transmitted encapsulated in IP (Internet Protocol) - datagrams (RFC 791), the order of receipt of which may not be respected, they may arrive at their destination in the wrong order in which they were sent. In the remote controller of FIG. 3, the TCP module segments, if necessary, are arranged so that the radio station of FIG. 3 receives the data intended for it in the original sequence. Since IP datagrams can still be duplicated during premature retransmission, the receiving party detects such cases and discards duplicate segments. TCP also provides data rate control. Buffer sizes on a TCP connection are limited. The receiving side controls the amount of data sent to it based on the availability of free space in the receiving buffer. Further, IP datagrams are encapsulated in Ethernet frames according to RFC 894 and IEEE 802.3 standard, and an Ethernet controller is transmitted via the microcontroller data bus of Fig. 1, which provides a speed of 10 megabits per second using the 10Base-T standard.

The system operates as follows.

The developed dispatcher program interface located in the computer allows you to enter the numbers of radio stations, the name of objects in the phone book and in the main interface window. Transmit or receive a call to a radio station, SDS messages, archive them by date, having its own unique IP address e and time of receipt.

After clicking on the command button of the mouse call, the previously entered number of the radio station from the computer through the RS232 port receives its unique IP address in the local controller of Figures 1, 2. Then, in the microprocessor TCP software module for transferring to the IEEE 802.3 standard, then through the data bus Ethernet controller, from the output of which, using the standard 10Base-T Ethernet network. The remote controller, which also has its own unique IP address, is connected to the Ethernet network and receives information intended for it. This information is converted by the Ethernet controller into a single byte data stream and, through the corresponding bus between them, enters the microprocessor, where it is finally converted from the IEEE 802.3 standard and comes using the RS232 port to a TETRA standard radio station. The radio station forms and sends an individual call. If the object radio station of Fig. 1 answered the call, then the radio station connected to the remote controller generates a corresponding command, which through the RS232 port will go to the remote controller, where in the future similar conversions will take place, that is, converting and transferring data to an Ethernet environment, transferring them to the local controller and to the computer. In the main computer window in the column "Connection Stages" instead of the inscription "Call" appears the inscription "Conversation" with fixing the time and date of the event. Which gives permission to negotiate. That is, when the tangent is pressed, a command is generated to turn on the power amplifier of the central radio station and a command to digitize the analog signal from the microphone output of Fig. 3. The digitized sound is transferred to an Ethernet environment and

Using UDP (User Datagram Protocol), it is transmitted to the remote controller at a speed of 64 kbit / second, where it is converted into an analog signal by a 12-bit digital-to-analog converter to feed the radio's audio input. At the end of the conversation, or if the object radio did not answer after a certain time, and the adoption of the appropriate command, the message “Hang up” will appear in the same column with the date, time of the event and archiving of all stages of the connection.

In the "Remote control alarm" mode, a window is displayed on the computer screen indicating which object the information came from. That is, the name of the object, the number of its radio station, the name of the sensors and controlled equipment. These parameters for each object can be programmed directly from the dispatcher.

The receipt of data in the radio controller or the operation of the sensor will cause the formation of the SDS message in the controller microprocessor to calculate the checksum of the message and transmit the latter using the object radio station to the central radio station and to the remote controller. After counting and checking the checksum, the microprocessor in the remote controller will transmit the corresponding receipt of the object radio station using the central radio station and only then will the microprocessor send data to the remote controller.

If the radio controller does not receive a receipt after 3 seconds, it will make repeated attempts to transmit data after 3, 6, 12, 24 seconds, the alarm will be transmitted until a receipt is received every 24 seconds.

As soon as the computer receives the data, then on the screen, even if the “Telecontrol and alarm” window has been minimized, this window pops up accompanied by sound signals. Informing the dispatcher about the event.

The application of the claimed system in radio communications will allow:

- place the radio station as close as possible to the antenna-feeder path, reducing the length of the coaxial cable and, accordingly, the high-frequency loss of the radio channel, while increasing the radio communication range

- place the place of the radio communication manager in the most convenient and safest place for a person

- the SELEKT-5 software module available in the remote controller and the DTMF tones encoding and decoding module allow you to use the system to control analogue radio stations.

Claims (3)

1. A digital system for remote monitoring and control of remote objects operating in the Ethernet network and using TETRA standard radio stations, including a personal computer with appropriate software connected to a local controller, a remote controller connected to a central radio station, at least one radio controller, associated with at least one object radio station, characterized in that the local and remote controllers are interconnected via an electrical interface 10Base-T using TCP / IP protocols, and a personal computer and a local controller, a remote controller and a central radio station, a radio controller and an object radio station are respectively interconnected via an RS232 interface. 2. The system according to claim 1, characterized in that the remote controller is configured to collect analog data from object radio stations. 3. The system according to claim 1, characterized in that a microphone, a speaker and a computer are connected to the local controller.