RU2558330C2 - System for radio communication with controlled objects - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to electrical and radio engineering and can be used in security systems and systems for monitoring the state of controlled objects. The system includes N≥1 territorially spread-apart receiving stations, from the outputs of which information signals are transmitted via additional links to corresponding inputs of a central surveillance panel, where in each receiving station, an antenna is made in the form of two spaced-apart antenna elements which are connected through antenna amplifiers to the first and second inputs of a two-channel receiver, the first and second outputs of which are respectively connected to the first and second inputs of a digital signal processing unit, the output of which is connected to the input of a secondary digital signal processing unit, the output of which is connected to the input of a data transmitting unit, the output of which is the output of the receiving station.

EFFECT: high stability of operation in dense urban development conditions with high level of industrial noise and interference fading, caused by the multipath effect of signals reflected from urban structures.

3 cl, 6 dwg

Description

The invention relates to electrical engineering, namely, radio communication systems with controlled stationary or moving objects, and, in particular, can be used in security systems and monitoring systems for the status of controlled objects.

Known radio communication systems for transmitting over the air the signals about the state of the controlled objects.

For example, a device is known according to DE patent No. 195063385, which includes a security object equipped with two radio transmitters operating with a mutual frequency spacing, two receivers located at a central monitoring point.

The presence of two radio channels increases the reliability of the object. However, this analogue has the disadvantage that increasing the reliability of protection requires a significant complication of the device and, as a result, often unreasonably high economic costs for its production and operation.

Also known is a radio communication system with a controlled object according to patent RU No. 2165677. The known device consists of a receiving and transmitting parts forming a radio channel. The receiving part is located in the central monitoring station (CMS) and includes a receiving antenna and a radio receiver. The transmitting part is installed on a controlled object (KO) and includes an information source and a carrier frequency generator, the output of which is connected to the input of the balance modulator, the output of which, in turn, is connected to the transmitting antenna through a power amplifier. A disadvantage of the known analogue is the relatively small zone of stable control, the radio communication system provides reliable reception of signals from the CO at the monitoring station at a distance of units of kilometers, and in urban conditions this distance decreases.

The closest analogue (prototype) in technical essence to the claimed one is the well-known radio communication system with controlled objects according to patent RU No. 2391711, IPC Н04В 1/68, G08B 25/0, published on 10.06.2010, bulletin No. 16.

The known radio communication system with controlled objects consists of a central monitoring station (CMS), equipped with a means of visualizing the state of controlled objects (CC), the receiving and transmitting parts. The receiving part is located in the monitoring station and includes a receiver unit connected via an antenna splitter to the receiving antenna and a digital signal processing unit (BTSC). The output of the receivers is connected to the inputs of the visualization tool. The transmitting part is installed on each KO and includes an information source, a carrier frequency modulator, a carrier frequency generator, a balanced modulator, a power amplifier, an adder, a subcarrier frequency generator, a balance voltage generator and a transmitting antenna.

The closest analogue due to the adopted method of forming in the transmitting part of the information signal provides a slight increase in the noise immunity of the radio channel.

The disadvantage of the closest analogue is the relatively small zone of stable and reliable monitoring of the state of the QoS due to regulatory restrictions on the power of the transmitters used on the QoS.

The purpose of the proposed technical solution is to develop a radio communication system with controlled objects, providing an extension of the zone of stable and reliable monitoring of the state of the QoS without increasing the power of the transmitters installed on the QoS.

This goal is achieved by the fact that in the known radio communication system with a CO containing a monitoring station equipped with a means of visualizing the state of a CO with a transmitting device (PrdU) installed on each of them, containing a transmitter (Prd), the output of which is connected to a transmitting antenna, a receiving station (PrmS ), containing a receiver (Prm), the input of which through the first antenna amplifier is connected to the receiving antenna, and a digital signal processing unit (BCOS), whose input is connected to the Prm output, N≥1 territorially spaced Prms are additionally introduced, from the outputs of which information signals are transmitted via additional communication channels to the corresponding inputs of the monitoring station. In each PrMS, the receiving antenna is made in the form of two spatially separated antenna elements, which, respectively, through the first and additionally introduced second antenna amplifiers are connected to the first and second inputs of the two-channel Prm, the first and second outputs of the two-channel Prm are connected respectively to the first and second inputs of the BCOS. The output of the BSCOS is connected to the input of the secondary digital signal processing unit (BSCOS). The output of the BVCOS is connected to the input of the data transmission unit (BPU), the output of which is the output of the PrMS. In addition, a satellite navigation receiver (SPS) is additionally introduced into each control unit, the output of which is connected to the “coordinate” input of the control controller, the information output of which is connected to the input of the control unit, and an interface matching unit (BSI). P≥1 information inputs and K≥1 BSI control outputs are connected respectively to the P state sensors KO and to the actuators and indicators placed on the KO. The BSI information signal bus is connected to the information inputs / outputs of the control controller. BTsOS consists of an analog-to-digital converter (ADC), the first and second inputs of which are the first and second inputs of the BTsOS, the ADC output is connected to the input of a digital filter, the output of which is connected to the input of a digital signal processor (DSP), the output of which is the output of the BTsOS.

BVCOS consists of an electronic computer (computer) with installed special software, the input and output of which are respectively the input and output of the BVCOS.

The specified new set of essential features of the claimed radio communication system with controlled objects due to the spatial diversity of the PrMS and the transmission of information signals from the QoS on the state of the QoS from the outputs provides an extension of the zone of stable and reliable monitoring of the state of the QoS without increasing the normative maximum radiation power of the transmitters installed on KO. In addition, due to the use of two antenna elements spatially spaced at the PrMS, the interference fading of the received Prm signals in urban conditions is achieved due to the multipath signals reflected from urban buildings.

The claimed radio communication system with KO is illustrated by drawings, which show:

Figure 1 is a General structural diagram of a radio communication system;

Figure 2 - structural diagram of the monitoring station;

Figure 3 is a structural diagram of PrMS;

4 is a structural diagram of a transmitting device;

5 is a block diagram of the algorithm of the radio communication system with KO;

6 is a structural diagram of BTsOS.

The claimed radio communication system with KO, shown in figure 1, consists of a monitoring station 1, N≥1 PrMS 2_one-2_N, set of KO 3_one, 32, ..., each of which is equipped with PrdU 4. The outputs of Prms 2 additional communication channels 5 are connected to the inputs of the monitoring station1. Additional communication channels 5 can be implemented via cable (wired, fiber optic) lines or using additional communication channels, for example, radio relay.

Station 1, the structural diagram of which is shown in figure 2, is designed to receive status signals of controlled objects from various subsystems, including PrMS, their subsequent processing, recording in a database and visualization at automated workstations of operators. Station 1 consists of the following nodes: integrating node 1.1, central module 1.2, database 1.3, visualization module 1.4. All nodes of the monitoring station 1 are interconnected via a local area network (LAN) 1.5, which provides two-way transmission of information between nodes.

The integrating node 1.1 is intended for receiving messages from various PrMS, decoding them, bringing them into a single format and transmitting them to the central module 1.2 for further processing. The integrating module can be implemented on the basis of a server built on the x86 platform with installed special software.

The central module 1.2 is designed to receive information about the state of the QoS from the integrating node 1.1, process it in accordance with the specified settings and rules, write to the database 1.3 and transfer it to the visualization module 1.4. The central module can be implemented on the basis of a server built on the x86 platform with installed special software.

Database 1.3 is intended for structured storage of data received from the central module and subsequent delivery to the visualization module 1.4. The database can be implemented on the basis of a server built on the x86 platform with installed special software.

The visualization module is designed to visualize information about the state of the QoS on the monitor screen in text and / or graphical form. As a visualization module, an automated workstation (AWS) of an operator can be used, including a computer, a monitor, manipulators (keyboard, mouse) and special software.

PrMS 2, the structural diagram of which is shown in Fig. 3, is designed to receive radio signals from Prd 4 installed on the QoS, process them, decode and transmit the monitoring station 1. PrMS 2 consists of two spatially separated antenna elements 2.1 and 2.2, which are respectively the first 2.3 and second 2.4 antenna amplifiers are connected to the first and second inputs of the two-channel receiver 2.5. The first and second outputs of the two-channel receiver 2.5 are connected respectively to the first and second inputs of BTsOS 2.6, the output of which is connected to the input of BTsOS 2.7. The output of the BVCOS is connected to the input of the BPD 2.8, the output of which is the output of Prms 2.

As antenna elements 2.1 and 2.2, for example, asymmetric vertical vibrators tuned to the working frequency band can be used.

Antenna amplifiers 2.3 and 2.4 are designed for pre-selection and amplification of signals received from KO 3. As the antenna amplifiers 2.3 and 2.4 can be used commercially available amplifiers Radial AGS-19V.

The two-channel receiver 2.5 is designed for selection and amplification of signals received from KO 3, transfer of the spectrum to an intermediate frequency (IF), and transmission of signals to BTsOS. A dual receiver based on the commercially available ICOM IC-R8500 modules can be used as a two-channel receiver.

BTsOS 2.6 is intended for digitization of signals, their quadrature filtering, spectrum transfer to zero frequency, calculation of spectral power.

The block diagram of BTsOS 2.6, shown in Fig.6, consists of two analog-to-digital converters 2.6.1 and 2.6.2, the inputs of which are inputs of BTsOS 2.6, and the outputs of which are connected to the corresponding inputs of two quadrature filters 2.6.3 and 2.6.4 . The outputs of the quadrature filters 2.6.3 and 2.6.4 are connected to the input of the digital signal processor (DSP) 2.6.5, the output of the DSP is the output of the BCOS 2.6.

As BTsOS can be used commercially available module ADP160QPCI.

BVCOS 2.7 is designed to isolate a message in each frequency channel, decode it and transmit it to BAP 2.8.

BVCOS 2.7 can be implemented on the basis of a computer built on the x86 platform with installed special software.

BPD 2.8 is intended for the transmission of processed data to the data channel between the PRMS 2 and the monitoring station 1.

As a BDT, a modem or a network card can be used, the type of which is determined by the physical interface for connecting to the data channel.

PrdU 4 is intended for monitoring the sensors of the state of KO 3, controlling actuators and indicators, determining the current position of KO 3 and transmitting information about the state of KO 3 to Prms 2.

PrdU 4, the structural of which is shown in figure 4, consists of Prd 4.1, the output of which is connected to a transmitting antenna 4.5, SNP 4.2, the output of which is connected to the input "coordinates" of the control controller 4.3, and BSI 4.4, P≥1 information inputs and K ≥1 of the control outputs of which are connected respectively to P state sensors KO 3 and to the actuators and indicators located on KO 3 (not shown in Fig. 4). The bus of information signals BSI 4.4 is connected to the information inputs / outputs of the control controller 4.3, the information output of which is connected to the input of the transmitter 4.1.

SNP 4.2 is designed to determine the location through one of the segments of the global navigation satellite system (GNSS) GPS / GLONASS 6 (see figure 1).

As a SPS, one of the commercially available satellite navigation receivers, for example, GEOS1M, can be used.

The control controller 4.3 is designed to process the received signals from SNP 4.2 and BSI 4, generate the corresponding control signals received through BSI 4.4 to the actuators and indicators, as well as to generate a data packet for Prd 4.1. A commercially available Atmel ATMega 32 microcontroller can be used as a control controller.

BSI 4.4 is designed to coordinate the electrical interface of the control controller 4.3 and the electrical interfaces for connecting the sensors of the state of KO 3 and actuating elements and indicators of KO.

BSI can be performed using commercially available electronic components (resistors, capacitors, transistors, solid state relays, diodes, etc.). The specific implementation scheme will be determined by the types of electrical interfaces of the selected control controller 4.3 and connected status sensors, actuators and indicators KO 3.

Prd 4.1 is designed to emit signals about the state of KO 3 into the air, which receive PrMS 2 of the general system.

Prd 4.1 can be performed on the basis of the commercially available ADF4360 module.

The claimed device operates as follows.

Preliminarily, for each KO 3 (both movable and stationary), a PRDU 4 is installed. To the information inputs of the PRDU 4 are connected the object's state sensors installed on the KO (ignition switch, door limit switches, motion sensor, temperature, fuel level, etc. for moving objects; fire detector, door opening, etc. for stationary objects).

The BSI 4.4 outputs controlling K are connected to KO 4 actuators and indicators (status indicator, engine blocking relay, etc.). Further, the claimed system operates according to an algorithm, a structural diagram of which is shown in FIG. 5

Signals about the initial state of the object and the coordinates of the location of the object are recorded in the control controller 4.3. According to the installed program, the control controller 4.3 periodically “polls” the status of the connected sensors and determines the current location of the TO 4. In case of a change in the state of one or more sensors or changes in the current location of the TO 4 relative to the initial one, a control signal is generated in the control controller according to the established algorithm to bring it to the appropriate position relevant actuators or indicators. At the same time, the control controller 4.4 generates an information signal about a change in the state of KO 3, the coordinates of its location, and the state of the sensors. The generated information signal is fed to the modulating input Prd 4.1, from the output of which a high-frequency signal modulated by the information signal is transmitted to the air using a transmit antenna 4.5.

Further, the state signals of CO 3 transmitted to the air are received by Prms 2 using two antenna elements 2.1 and 2.2, from the output of which they go to the inputs of the first 2.3 and second 2.4 antenna amplifiers for preliminary selection and amplification, followed by transmission to the inputs of the two-channel receiver 2.5. In a two-channel receiver 2.5, the signals received on each channel are filtered, amplified, and converted to an intermediate frequency. From the outputs of the two-channel receiver 2.5, the signals are fed to the inputs of BTsOS 2.6, where the analog signals are digitized, filtered and transferred to the zero frequency, then in the DSP 2.6.5, the discrete Fourier transform is performed on the received signals, the spectral power of the signals in each frequency channel is calculated, the channel with highest signal strength. The use of a two-element receiving antenna and further processing of the received signals through two channels can improve the quality of signal reception in the conditions of interference fading with multipath signal propagation, which takes place in urban conditions of the system. Digitization of the signals at an intermediate frequency, followed by quadrature processing, transferring the spectrum to zero frequency and performing a fast Fourier transform makes it possible to increase the signal-to-noise ratio and, consequently, increase the range of PrMS 2. The resulting array of processed digital signals in the form of a time-frequency matrix on the state of the QoS 3 served on BVCOS 2.7. In BVCOS 2.7 emit messages about the state of KO 3 in each frequency channel, decode and transmit them via additional communication lines to the input of the integrating node 1.1 of monitoring station 1 (see figure 2). The use of BVCOS 2.7 allows you to increase system performance, expand the range of operating frequencies and increase system throughput 1.

Then, on the integrating unit 1.1, the monitoring station 1 receives messages from different PrMS 2, combines them and brings them into a single format with further transmission to the central module 1.2. On the central module 1.2, messages are processed in accordance with the specified settings and rules, written to the database 1.3 and transferred to the visualization module 1.4. Using visualization module 1.4, information about the current state of KO 3 serves as the basis for the system operators to make management decisions.

Thus, in the claimed system, through the use of a combination of spatially separated receiving stations, receiving signals to a pair of separated antenna elements and their further processing through two independent receiving paths, more stable and reliable monitoring is achieved at the controlled objects, in a wider monitoring zone and with a relatively small power of transmitters installed at controlled facilities, which confirms the possibility of achieving the formulated technical result when working with declared system.

Claims (3)

1. A radio communication system with monitored objects, comprising a central monitoring station equipped with a means of visualizing the states of monitored objects (QoS), each QoS has a transmitting device containing a transmitter, the output of which is connected to the antenna, a receiving station containing a receiver, the input of which is through an antenna amplifier connected to the antenna, and a digital signal processing unit, the input of which is connected to the output of the receiver, characterized in that N≥1 territorially spaced receivers are additionally introduced stations, from the outputs of which information signals are transmitted via additional communication channels to the corresponding inputs of the central monitoring console, and in each receiving station, the antenna is made in the form of two spatially separated antenna elements, which are connected through antenna amplifiers to the first and second inputs of a two-channel receiver, the first and the second outputs of which are connected respectively to the first and second inputs of the digital signal processing unit, the output of which is connected to the input of the secondary digital In the process of signal processing, the output of which is connected to the input of the data transmission unit, the output of which is the output of the receiving station, a satellite navigation receiver is additionally introduced into each transmitting device, the output of which is connected to the “coordinate” input of the control controller, the information output of which is connected to the transmitter input, and an interface matching unit, P≥1 information inputs and K≥1 control outputs of which are connected respectively to P state sensors and K actuators and indicators tori located on the controlled object, and the bus of information signals of the block matching interfaces is connected to the information inputs / outputs of the control controller. 2. The system according to claim 1, characterized in that the digital signal processing unit consists of an analog-to-digital converter, the first and second inputs of which are the first and second inputs of the block, the output of the analog-to-digital converter is connected to the input of the digital filter, the output of which is connected to the input of a digital signal processor, the output of which is the output of the unit. 3. The system according to claim 1, characterized in that the secondary digital signal processing unit consists of an electronic computer, the input of which is the input of the unit, and the output of which is the output of the unit.

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