CN112422216A - Tunnel electromechanical system control instruction wireless issuing method based on frequency modulation data broadcasting - Google Patents
Tunnel electromechanical system control instruction wireless issuing method based on frequency modulation data broadcasting Download PDFInfo
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- CN112422216A CN112422216A CN202011287091.3A CN202011287091A CN112422216A CN 112422216 A CN112422216 A CN 112422216A CN 202011287091 A CN202011287091 A CN 202011287091A CN 112422216 A CN112422216 A CN 112422216A
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- 238000005516 engineering process Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
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- 238000010586 diagram Methods 0.000 description 3
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- 238000010295 mobile communication Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/71—Wireless systems
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Abstract
The wireless issuing method of the control instruction of the electromechanical system of the tunnel based on frequency modulation data broadcasting realizes the wireless issuing of the control instruction of the electromechanical system, tunnel management personnel can issue the control instruction in the tunnel management station or the electric substation of the tunnel portal in time and remotely according to the traffic state, the constraint of a wired communication line is eliminated, the reliability and the effectiveness of the intelligent control of the electromechanical system are improved, the reconstruction work amount is small, and the operation is simple and convenient. The method comprises the following steps: (1) standby mode for electromechanical system control command issue; (2) judging whether the wired communication is interrupted due to an emergency reason, if so, executing the step (3), otherwise, executing the step (5); (3) the tunnel related electromechanical system starts to receive a frequency modulation wireless control instruction; (4) wirelessly issuing a control instruction of an electromechanical system through frequency modulation broadcasting; (5) judging whether the wired communication is interrupted due to maintenance, if so, executing the step (3), otherwise, executing the step (6); (6) the electromechanical system controls the frequency modulation wireless release system to be standby as a standby link.
Description
Technical Field
The invention belongs to the technical field of intelligent transportation, and particularly relates to a wireless issuing method of a tunnel electromechanical system control instruction based on frequency modulation data broadcasting.
Background
Fm data broadcasting is a wireless communication technology that sets up channels for data broadcasting using the free portion of the existing fm broadcast spectrum.
The frequency modulation data broadcasting technology is applied to foreign countries earlier. In the beginning of the twentieth century and the fifties, frequency modulation auxiliary communication services were launched in the united states, frequency modulation data broadcasting technology was widely applied to a plurality of fields in europe and a unified technical specification was formed, and data broadcasting suitable for a fixed receiving mode was officially broadcast on a frequency modulation broadcasting station in tokyo in 1988 in japan.
China starts vigorous research, popularization and application of frequency modulation data broadcasting in the 90 s of the twentieth century, and is mainly applied to aspects of broadcast paging, traffic guidance, economic information release, emergency broadcasting and the like. The application of frequency modulation data broadcasting in the subdivision field of tunnel electromechanical system control is not found at present.
Compared with the current mainstream wireless mobile communication technology, the frequency modulation data broadcasting has the advantages of low time delay, strong diffraction capability of a frequency band, no capacity limitation of a broadcasting receiving terminal and the like, and has the advantage of difficult substitution in the aspect of tunnel traffic information release.
The electric system in the tunnel generally comprises power supply and distribution and power monitoring, ventilation and ventilation control, illumination and lighting control, a communication system, a fire-fighting alarm system, a monitoring system and the like, and is an important guarantee for normal operation of tunnel traffic. Along with the increasing abundance and perfection of the functions of the electrical system in the tunnel, the intelligent control system of the electrical system in the tunnel based on the PLC is popularized, wherein the PLC can be remotely monitored and can also work independently. This is important in both the daily operation and the emergency state of the tunnel.
However, most of the intelligent control systems of the electrical systems in the tunnels and the tunnel management control systems currently use optical fiber communication, and an economical and reasonable standby communication route form is lacked, especially when the primary optical fiber route needs to be overhauled or is interrupted due to an emergency, although a new communication route can be established by using a 2G, 3G, 4G or 5G network of a mobile communication operator to perform wireless issuing of a control instruction, the wireless issuing based on the type of communication instruction depends on a communication network base station in the tunnel with a short distance nearby, so that the comprehensive cost is high, and most of the base stations still rely on a wired communication line to realize communication with a previous-level network node. When the wire communication is interrupted due to an emergency occurring in the tunnel, the communication capability is often lost.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method overcomes the defects of the prior art, and provides a wireless issuing method of the control instruction of the electromechanical system of the tunnel based on frequency modulation data broadcasting, which realizes the wireless issuing of the control instruction of the electromechanical system, tunnel management personnel can issue the control instruction in the tunnel management station or the tunnel entrance substation in a long-distance manner according to the traffic state, thereby further getting rid of the constraint of a wired communication line, improving the reliability and effectiveness of the intelligent control of the electromechanical system, and having small reconstruction workload and simple operation.
The technical solution of the invention is as follows: the wireless issuing method of the control instruction of the tunnel electromechanical system based on frequency modulation data broadcasting comprises the following steps:
(1) standby mode for electromechanical system control command issue;
(2) judging whether the wired communication is interrupted due to an emergency reason, if so, executing the step (3), otherwise, executing the step (5);
(3) the tunnel related electromechanical system starts to receive a frequency modulation wireless control instruction;
(4) wirelessly issuing a control instruction of an electromechanical system through frequency modulation broadcasting;
(5) judging whether the wired communication is interrupted due to maintenance, if so, executing the step (3), otherwise, executing the step (6);
(6) the electromechanical system controls the frequency modulation wireless release system to be standby as a standby link.
The invention arranges an electromechanical system control instruction wireless frequency modulation adapter in a related monitoring system in a tunnel management unit or a tunnel entrance substation, modulates the electromechanical system control instruction to a frequency modulation broadcast signal subcarrier of a specified frequency point, and realizes the release of a corresponding control instruction through the existing tunnel frequency modulation broadcast system; a frequency modulation data broadcast receiving module is configured at the equipment end of the tunnel electromechanical system, a control instruction is demodulated and restored from a frequency modulation broadcast signal subcarrier of a specified frequency point and then is sent to an I/O module of the existing PLC of the electromechanical system, so that the control instruction is transmitted to a control module of the electromechanical system; therefore, the wireless issuing of the electromechanical system control instruction is realized, tunnel management personnel can remotely issue the control instruction in time at a tunnel management station or a tunnel entrance substation according to the traffic state, the constraint of a wired communication line is further eliminated, the reliability and effectiveness of intelligent control of the electromechanical system are improved, the engineering quantity is small, and the operation is simple and convenient.
Drawings
Fig. 1 is a flowchart of an implementation of a method for wirelessly issuing control commands for a tunnel electromechanical system based on frequency modulation data broadcasting according to the present invention;
FIG. 2 is an overall architecture diagram of the present invention;
FIG. 3 is a functional block diagram of a transmitting end of the present invention;
fig. 4 is a receiving end functional block diagram of the present invention.
Detailed Description
As shown in fig. 1, the method for wirelessly issuing control commands of a tunnel electromechanical system based on frequency modulation data broadcasting comprises the following steps:
(1) standby mode for electromechanical system control command issue;
(2) judging whether the wired communication is interrupted due to an emergency reason, if so, executing the step (3), otherwise, executing the step (5);
(3) the tunnel related electromechanical system starts to receive a frequency modulation wireless control instruction;
(4) wirelessly issuing a control instruction of an electromechanical system through frequency modulation broadcasting;
(5) judging whether the wired communication is interrupted due to maintenance, if so, executing the step (3), otherwise, executing the step (6);
(6) the electromechanical system controls the frequency modulation wireless release system to be standby as a standby link.
The invention arranges an electromechanical system control instruction wireless frequency modulation adapter in a related monitoring system in a tunnel management unit or a tunnel entrance substation, modulates the electromechanical system control instruction to a frequency modulation broadcast signal subcarrier of a specified frequency point, and realizes the release of a corresponding control instruction through the existing tunnel frequency modulation broadcast system; a frequency modulation data broadcast receiving module is configured at the equipment end of the tunnel electromechanical system, a control instruction is demodulated and restored from a frequency modulation broadcast signal subcarrier of a specified frequency point and then is sent to an I/O module of the existing PLC of the electromechanical system, so that the control instruction is transmitted to a control module of the electromechanical system; therefore, the wireless issuing of the electromechanical system control instruction is realized, tunnel management personnel can remotely issue the control instruction in time at a tunnel management station or a tunnel entrance substation according to the traffic state, the constraint of a wired communication line is further eliminated, the reliability and effectiveness of intelligent control of the electromechanical system are improved, the engineering quantity is small, and the operation is simple and convenient.
Preferably, as shown in fig. 2, the electromechanical system control instruction wireless fm adapter is disposed in a tunnel management unit or a related monitoring system in a tunnel portal substation, data of the electromechanical system control instruction is encoded and modulated on a subcarrier of a frequency modulation broadcast designated frequency point, and then a radio frequency signal is output by a fm broadcast transmitter with a subcarrier interface in the existing tunnel fm broadcast system, thereby realizing transmission and coverage of the wireless signal; the tunnel electromechanical system equipment side is provided with a frequency modulation data broadcast receiving module, demodulates the frequency modulation broadcast signal subcarrier of the appointed frequency point and restores a control instruction, and then sends the control instruction to an I/O module of the existing PLC of the electromechanical system, so that the control instruction is transmitted to the electromechanical system control module.
Preferably, as shown in fig. 3, the electromechanical system control instruction wireless fm adapter applies software radio technology, takes FPGA as a core, and adopts a digital signal processing algorithm to modulate the electromechanical system control instruction to a frequency point specified fm broadcast signal subcarrier. In order to make the control command of the tunnel electromechanical system better adapt to the channel transmission characteristic of the method, differential encoding is needed to overcome the problem that the carrier phase is fuzzy when a receiving end demodulates, and code bit synchronization is more favorably extracted through biphase encoding. While these processes are done on the subcarrier frequency basis.
Preferably, as shown in fig. 4, the FM data broadcast receiving module uses an FM radio chip as a core, configures a peripheral auxiliary circuit, and demodulates an electromechanical system control instruction from a frequency modulation subcarrier at a specified frequency point. The sub-carrier demodulated from the tunnel frequency modulation broadcast signal is recovered and synchronously demodulated, and the obtained signal is subjected to low-pass filtering, so that biphase decoding and differential decoding can be better performed on the signal, and the processed data can be input to an I/O (input/output) module of a tunnel electromechanical system (PLC). While these processes are all done based on clock recovery of the subcarrier frequency.
The invention adopts a typical sending and receiving framework of frequency modulation broadcasting, and can be standby as a standby mode for the control instruction release of an electromechanical system while not influencing the broadcasting of normal frequency modulation broadcasting programs in a normal running state of a tunnel; the invention can realize the wireless issuing of the control instruction of the electromechanical system under the conditions of the communication line maintenance of the electromechanical system in the tunnel and the interruption of the wired communication line of the electromechanical system in the tunnel caused by some emergency situations, such as landslide, traffic jam, traffic accident, fire and the like.
The invention has the following remarkable advantages:
1. the wireless issuing of the control instruction of the electromechanical system is realized, and a tunnel manager can issue the control instruction in a tunnel management station or a tunnel entrance substation in time and remotely according to the traffic state, so that the constraint of a wired communication line is further eliminated;
2. the relatively mature frequency modulation broadcasting technology is adopted, the requirements of the traffic industry are combined, the control instruction of the electromechanical system is issued in a wireless mode, the reliability and effectiveness of intelligent control of the electromechanical system are improved, and the method has the advantages of small modification engineering amount, simplicity and convenience in operation and the like.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiment according to the technical spirit of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (4)
1. A tunnel electromechanical system control instruction wireless issuing method based on frequency modulation data broadcasting is characterized in that: the method comprises the following steps:
(1) standby mode for electromechanical system control command issue;
(2) judging whether the wired communication is interrupted due to an emergency reason, if so, executing the step (3), otherwise, executing the step (5);
(3) the tunnel related electromechanical system starts to receive a frequency modulation wireless control instruction;
(4) wirelessly issuing a control instruction of an electromechanical system through frequency modulation broadcasting;
(5) judging whether the wired communication is interrupted due to maintenance, if so, executing the step (3), otherwise, executing the step (6);
(6) the electromechanical system controls the frequency modulation wireless release system to be standby as a standby link.
2. The method for wirelessly issuing control commands of a tunnel electromechanical system based on frequency modulation data broadcasting according to claim 1, wherein: the electromechanical system control instruction wireless frequency modulation adapter is arranged in a related monitoring system in a tunnel management unit or a tunnel entrance substation, data of electromechanical system control instructions are coded and modulated on subcarriers of specified frequency points of frequency modulation broadcasting, and then radio frequency signals are output by a frequency modulation broadcasting transmitter with a subcarrier interface in the existing tunnel frequency modulation broadcasting system, so that the transmission and the coverage of wireless signals are realized; the tunnel electromechanical system equipment side is provided with a frequency modulation data broadcast receiving module, demodulates the frequency modulation broadcast signal subcarrier of the appointed frequency point and restores a control instruction, and then sends the control instruction to an I/O module of the existing PLC of the electromechanical system, so that the control instruction is transmitted to the electromechanical system control module.
3. A method according to claim 2, wherein the method comprises the following steps: the electromechanical system control instruction wireless frequency modulation adapter adopts a software radio technology, takes an FPGA as a core, and adopts a digital signal processing algorithm to modulate an electromechanical system control instruction to a frequency modulation broadcast signal subcarrier with a specified frequency point.
4. A method according to claim 3, wherein said method comprises: the FM data broadcast receiving module takes an FM radio chip as a core, is provided with a peripheral auxiliary circuit and demodulates an electromechanical system control instruction from a frequency modulation subcarrier of a designated frequency point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011287091.3A CN112422216A (en) | 2020-11-17 | 2020-11-17 | Tunnel electromechanical system control instruction wireless issuing method based on frequency modulation data broadcasting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011287091.3A CN112422216A (en) | 2020-11-17 | 2020-11-17 | Tunnel electromechanical system control instruction wireless issuing method based on frequency modulation data broadcasting |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291738A (en) * | 2011-08-11 | 2011-12-21 | 大连理工大学 | Data monitoring system based on wireless sensor network and gateway equipment thereof |
| CN102739456A (en) * | 2012-07-13 | 2012-10-17 | 西南交通大学 | Wired and wireless hot backup redundancy multi-master communication method, and field gateway module |
| CN202871089U (en) * | 2012-09-15 | 2013-04-10 | 海宁伊满阁太阳能科技有限公司 | General intelligent signal-lamp control system |
| KR20180043462A (en) * | 2016-10-20 | 2018-04-30 | 대보정보통신 주식회사 | System for Remote Monitoring Tunnel Radio |
-
2020
- 2020-11-17 CN CN202011287091.3A patent/CN112422216A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291738A (en) * | 2011-08-11 | 2011-12-21 | 大连理工大学 | Data monitoring system based on wireless sensor network and gateway equipment thereof |
| CN102739456A (en) * | 2012-07-13 | 2012-10-17 | 西南交通大学 | Wired and wireless hot backup redundancy multi-master communication method, and field gateway module |
| CN202871089U (en) * | 2012-09-15 | 2013-04-10 | 海宁伊满阁太阳能科技有限公司 | General intelligent signal-lamp control system |
| KR20180043462A (en) * | 2016-10-20 | 2018-04-30 | 대보정보통신 주식회사 | System for Remote Monitoring Tunnel Radio |
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