CN103532874B - The implementation method of LNG tank case monitor in real time in railway transport course - Google Patents
The implementation method of LNG tank case monitor in real time in railway transport course Download PDFInfo
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- CN103532874B CN103532874B CN201310448619.4A CN201310448619A CN103532874B CN 103532874 B CN103532874 B CN 103532874B CN 201310448619 A CN201310448619 A CN 201310448619A CN 103532874 B CN103532874 B CN 103532874B
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Abstract
The implementation method of LNG tank case monitor in real time in railway transport course, it relates to the monitoring method of the liquid hazardous substance of a kind of train box storage of bulk transport tank, wirelessly transmits the monitoring method of data in particular to LNG tank case in railway transport course. The wireless instrument arranged on LNG tank case, drover's car has in Surveillance center radio receiver and computer, it is characterized in that: drover's car arranges in Surveillance center the identical radio receiver of two covers, two different input terminuss of its output terminal access computer, computer arranges LNG tank case database, the data buffer memory of n data packet, supervisory system can be deposited, wireless instrument timed sending detection data, Surveillance center receives data back zone divided data and replys, and wireless instrument is according to the time regulation time basic point receiving response. Adopting technical scheme provided by the invention, wireless instrument enters order state very soon, can receive detection data more reliably under complicated environment, and two cover receiving equipments can backup each other, it is to increase the reliability of system.
Description
Technical field
The present invention relates to the monitoring method of the liquid hazardous substance of a kind of train box storage of bulk transport tank, in railway transport course, wirelessly transmit the monitoring method of data in particular to LNG tank case.
Background technology
In recent years, the development of LNG tank formula freight container was very fast, it may also be useful to tank case, by sea route, transport by road LNG, has become main mode and the means of transport at present. Transportation by railroad is cheap, safe and reliable, but transportation by railroad LNG tank case is country is prohibited, and major cause is that in the security of tank box structure and transportation, the feasibility of tank case monitoring also can not meet the requirement that railway security runs.
Along with the development of national economy, no matter all parts of the country are produce or life, the dependence of Sweet natural gas is increasing, it is necessary to research and design goes out supervisory system and the monitoring method of the liquid hazardous substance of a kind of railway box storage of bulk transport tank, makes railway bulk transport LNG tank case become possibility.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of monitoring method, in railway transport course, it is achieved to the real-time detection of the safe state of LNG tank case, meets the safety requirements of railway bulk transport LNG tank case.
For achieving the above object, the technical solution used in the present invention is: the implementation method of LNG tank case monitor in real time in railway transport course, the radio receiver that the method relies on LNG tank case on the wireless instrument and drover's car that arrange in Surveillance center and computer realize, it is crucial that: drover's car arranges in Surveillance center the identical radio receiver of two covers, the antenna of two cover receiving equipments is placed on different positions, and two cover receiving equipment output terminal access computer two different input terminuss, computer arranges LNG tank case database, the data buffer memory of n data packet can be deposited, supervisory system, supervisory system comprises data sink module and signal processing module, monitoring method comprises the following steps:
A, the ID of wireless instrument and the mapping table of LNG tank case are set in LNG tank case database, the supervisory system in start-up simulation machine,
B, startup wireless instrument, wireless instrument timing acquiring data, and stored in transmit queue after data are packed; When arrive transmission time interval time, wireless instrument takes out data packet from transmit queue and sends, data packet comprise wireless instrument ID, detection data, the time stamp,
C, when computer receives the data packet that receiving equipment transmits, data sink module judges that data are whether correct, if mistake, abandons; If correct, judge the number of data packet in buffer memory, if existing n data packet, by first stored in data packet remove, by the port identification code of the data packet that receives and reception data stored in buffer memory; If less than n data packet, by the data packet that receives and the port identification code that receives data stored in buffer memory,
D, signal processing module scans data buffer memory, during if there is untreated data packet, judge whether consistent with untreated data packet of the ID of wireless instrument in all processed data packets in buffer memory and time stamp, if unanimously, this data packet is marked as processed; If inconsistent, carry out processing according to the ID of wireless instrument and the mapping table of LNG tank case by the data in data packet and store data, this data packet is marked as processed; Sending reply data bag, reply data bag comprises the ID code of wireless instrument,
After E, wireless instrument receive reply data bag, judging the ID code of wireless instrument in data packet, if mated with ID code itself, being then time basic point by the set of time receiving reply data bag.
Each wireless instrument has a unique ID code, and each LNG tank case arranges several wireless instruments. The ID of wireless instrument and the mapping table of LNG tank case are set, it is possible to obtain corresponding LNG tank case from the ID of wireless instrument, computer can be identified.
Isolation lorry is had between LNG tank case and monitoring car, and the car body loading LNG tank case is a lot, therefore LNG tank case distance detection spacing is different, again due to circumstance complication in train travelling process, in order to improve the reliability of transfer, detecting in LNG tank in the wireless transmission system of data and adopt two sets of data receiving equipments, antenna installation is at the different positions of Surveillance center, and the output of every sets of data receiving equipment is connected to the different input terminuss monitoring terminal. Owing to the position of two secondary antenna installations is different, when vehicle runs under complicated environment, two secondary electromagnetic environments residing for antenna are also different, so effectively improve the validity and reliability of transfer. In addition, two cover receiving equipments work simultaneously, it is possible to backup each other.
Adopt two sets of data receiving equipments, there will be the situation simultaneously receiving same data packet, we have employed a kind of like this mechanism: stores the data packet that some amount is processed, when processing the data packet newly arrived, ID and time stamp information according to wireless instrument in data packet compare with the data packet of storage, if having identical, this data packet processed being described, then abandons this bag. Doing so avoids re-treatment data.
Wireless instrument is set to timed sending data, in the initial stage, it is unordered and random that wireless instrument sends the time of data, certain like this can cause the data collision at receiving end, it is therefore desirable to determine to send the different time basic point of data for each wireless instrument, it is determined that after time basic point, wireless instrument is with this basic point computing time, after during the time of arrival of interval, send data packet.
In the present invention, each data packet received is replied by Surveillance center, after wireless instrument receives response, is time basic point by the set of time receiving reply data bag. Because free interval between the response that Surveillance center sends, therefore can ensure that the time basic point of each wireless instrument is different, after all wireless instruments are provided with again, the data of each wireless instrument can send in the different time, and data collision can not occur.
In an experiment, it may also be useful to 10 wireless instruments, each instrument be all 5 minutes send primary information (send 1-10 minute cycle, instrument have function is set online), through 5-10 minute, each wireless instrument just started to send in order successively data.
Adopting technical scheme provided by the invention, wireless instrument enters order state very soon, can receive detection data more reliably under complicated environment, and two cover receiving equipments can backup each other, it is to increase the reliability of system.
Accompanying drawing explanation
Fig. 1 is the schematic layout pattern of equipment in the present invention,
Fig. 2 is the schema of wireless instrument image data,
Fig. 3 is the schema that wireless instrument sends data,
Fig. 4 is the processing flow chart that wireless instrument receives acknowledge signal,
Fig. 5 is the processing flow chart of data sink module,
Fig. 6 is the processing flow chart of signal processing module,
Fig. 7 is another processing flow chart of signal processing module.
Wherein, 1-1 is computer, and 1-2 is the antenna of receiving equipment, and 1-3 is receiving equipment, and 2 is wireless instrument.
Embodiment
In railway transport course, LNG tank case arranges wireless instrument, the Che Zuzhong transporting LNG tank case arranges Surveillance center, Surveillance center arranges the radio receiver that two covers are identical, the antenna of two cover receiving equipments is placed on different positions, and two different input terminuss of the output terminal access computer of two cover receiving equipments. Arranging LNG tank case database in computer, can deposit the data buffer memory of n data packet, supervisory system, supervisory system comprises data sink module and signal processing module.
Starting computer and the wireless instrument of Surveillance center, the method comprises the following steps:
A, the ID of wireless instrument and the mapping table of LNG tank case are set in LNG tank case database, the ID of all wireless instruments that LNG tank case is arranged are corresponded on this LNG tank case, the supervisory system in start-up simulation machine,
B, startup wireless instrument, Starting mode can be that by sending, instruction starts supervisory system. Wireless instrument timing acquiring data, and stored in transmit queue after data are packed; When arrive transmission time interval time, wireless instrument takes out data packet from transmit queue and sends, data packet comprise wireless instrument ID, detection data, the time stamp,
C, when computer receives the data packet that receiving equipment transmits, data sink module judges that data are whether correct, if mistake, abandons; If correct, judge the number of data packet in buffer memory, if existing n data packet, by first stored in data packet remove, by the port identification code of the data packet that receives and reception data stored in buffer memory; If less than n data packet, by the data packet that receives and the port identification code that receives data stored in buffer memory,
D, signal processing module scans data buffer memory, during if there is untreated data packet, judge whether consistent with untreated data packet of the ID of wireless instrument in all processed data packets in buffer memory and time stamp, if unanimously, this data packet is marked as processed; If inconsistent, carry out processing according to the ID of wireless instrument and the mapping table of LNG tank case by the data in data packet and store data, this data packet is marked as processed; Sending reply data bag, reply data bag comprises the ID code of wireless instrument,
After E, wireless instrument receive reply data bag, judging the ID code of wireless instrument in data packet, if mated with ID code itself, being then time basic point by the set of time receiving reply data bag.
In the computer of Surveillance center, in data buffer memory, the number of data packet is minimum is 2, maximum is no more than 50, in actual applications, arranges according to the number of LNG tank case.
Another processing mode of step D is: signal processing module scans data buffer memory, during if there is untreated data packet, judge whether consistent with untreated data packet of the ID of wireless instrument in all processed data packets in buffer memory and time stamp, if consistent, then data packet consistent to the data packet processed and comparison is deleted from buffer memory; If inconsistent, carry out processing according to the ID of wireless instrument and the mapping table of LNG tank case by the data in data packet and store data, this data packet is marked as processed; Sending reply data bag, reply data bag comprises the ID code of wireless instrument.
In stepb, data packet also comprises cell voltage data.
When alarm occurs in instrument, wireless instrument sends data packet immediately, without interval computing time.
In order to ensure the integrity that wireless instrument data send, in step D, the reply data bag of transmission comprises whole contents that wireless instrument sends over data packet; In step e, judge the content in reply data bag, from transmit queue, delete corresponding data packet.
Below in conjunction with accompanying drawing, the invention will be further described.
Referring to Fig. 1, Surveillance center arranges computer 1-1, computer 1-1 connect two cover receiving equipment 1-3, receiving equipment 1-3 by antenna 1-2 with, the wireless instrument 2 on LNG tank case connects. Two different input terminuss of the output terminal access computer 1-1 of two cover receiving equipment 1-3.
Arrange the size of data pack buffer in computer according to LNG tank box number, in general, the size of n is identical with LNG tank box number.
Supervisory system in start-up simulation machine and all wireless instruments.
Referring to Fig. 2, when arrive acquisition time time, after wireless instrument image data by data pack, data content comprise wireless instrument ID, detection data, the time stamp and cell voltage data. Packing data is stored in transmit queue. Transmit queue is the data storage zone of a FIFO.
Referring to Fig. 3, when calculating the arrival transmission time according to time basic point, from transmit queue, take out a Packet Generation.
Referring to Fig. 5, when computer receives the data packet that receiving equipment transmits, data sink module judges that whether data are correct, if mistake, abandons; If correct, judge the number of data packet in buffer memory, if data are full in buffer memory, already have n data packet, by first stored in data packet remove, by the port identification code of the data packet that receives and reception data stored in buffer memory; Otherwise, by the data packet that receives and receive data port identification code stored in buffer memory.
Referring to Fig. 6, signal processing module scans data buffer memory, during if there is untreated data packet, judge whether consistent with the current data packet processed of the ID of wireless instrument in all processed data packets in buffer memory and time stamp, if it is consistent, illustrate that two cover receiving equipments receive identical data packet, this data packet is marked as processed; If inconsistent, carry out processing according to the ID of wireless instrument and the mapping table of LNG tank case by the data in data packet and store data, this data packet is marked as processed;
For the data packet that each receives, all sending reply data bag, reply data bag comprises the ID code of wireless instrument. Owing to using two cover receiving equipments, therefore Surveillance center has two cover response apparatus, when sending reply data bag, it is possible to use fixing port, it is possible to use receive the port of this data packet.
Using fixing port to send response, control is simple; The port receiving this data packet is used to send response, it may be determined that the equipment connecting this port is normal operation, it is ensured that gone out by Packet Generation.
Referring to Fig. 4, after wireless instrument receives reply data bag, judge the ID code of wireless instrument in data packet, if mated with the ID code of itself, illustrating that this response is sent to this wireless instrument, be now time basic point by the set of time that receives reply data bag, the time sent from now on started to calculate with this time, judge the content in reply data bag simultaneously, from transmit queue, delete corresponding data packet. Can ensure that all data of wireless instrument can be received like this.
Referring to Fig. 7, another treating processes of signal processing module: scan-data buffer memory, during if there is untreated data packet, judge whether consistent with the current data packet processed of the ID of wireless instrument in all processed data packets in buffer memory and time stamp, if it is consistent, illustrate that two cover receiving equipments receive identical data packet, data packet consistent to the data packet processed and comparison is deleted from buffer memory; If inconsistent, carry out processing according to the ID of wireless instrument and the mapping table of LNG tank case by the data in data packet and store data, this data packet is marked as processed;
For the data packet that each receives, all sending reply data bag, reply data bag comprises the ID code of wireless instrument. Owing to using two cover receiving equipments, therefore Surveillance center has two cover response apparatus, when sending reply data bag, it is possible to use fixing port, it is possible to use receive the port of this data packet.
Claims (7)
- The implementation method of 1.LNG tank case monitor in real time in railway transport course, the radio receiver that the method relies on LNG tank case on the wireless instrument and drover's car that arrange in Surveillance center and computer realize, it is characterized in that: drover's car arranges in Surveillance center the identical radio receiver of two covers, the antenna of two cover receiving equipments is placed on different positions, and two cover receiving equipment output terminal access computer two different input terminuss, computer arranges LNG tank case database, the data buffer memory of n data packet can be deposited, supervisory system, supervisory system comprises data sink module and signal processing module, monitoring method comprises the following steps:A, the ID of wireless instrument and the mapping table of LNG tank case are set in LNG tank case database, the supervisory system in start-up simulation machine,B, startup wireless instrument, wireless instrument timing acquiring data, and stored in transmit queue after data are packed; When arrive transmission time interval time, wireless instrument takes out data packet from transmit queue and sends, data packet comprise wireless instrument ID, detection data, the time stamp,C, when computer receives the data packet that receiving equipment transmits, data sink module judges that data are whether correct, if mistake, abandons; If correct, judge the number of data packet in buffer memory, if existing n data packet, by first stored in data packet remove, by the port identification code of the data packet that receives and reception data stored in buffer memory; If less than n data packet, by the data packet that receives and the port identification code that receives data stored in buffer memory,D, signal processing module scans data buffer memory, during if there is untreated data packet, judge whether consistent with untreated data packet of the ID of wireless instrument in all processed data packets in buffer memory and time stamp, if unanimously, this data packet is marked as processed; If inconsistent, carry out processing according to the ID of wireless instrument and the mapping table of LNG tank case by the data in data packet and store data, this data packet is marked as processed; Sending reply data bag, reply data bag comprises the ID code of wireless instrument,After E, wireless instrument receive reply data bag, judging the ID code of wireless instrument in data packet, if mated with ID code itself, being then time basic point by the set of time receiving reply data bag.
- 2. the implementation method of LNG tank case monitor in real time in railway transport course according to claim 1, it is characterised in that: the scope of n is greater than 1 to be less than or equal to 50.
- 3. the implementation method of LNG tank case monitor in real time in railway transport course according to claim 1, it is characterised in that: step D is:Signal processing module scans data buffer memory, during if there is untreated data packet, judge whether consistent with the current data packet processed of the ID of wireless instrument in all processed data packets in buffer memory and time stamp, if consistent, then data packet consistent to the data packet processed and comparison is deleted from buffer memory; If inconsistent, carry out processing according to the ID of wireless instrument and the mapping table of LNG tank case by the data in data packet and store data, this data packet is marked as processed; Sending reply data bag, reply data bag comprises the ID code of wireless instrument.
- 4. the implementation method of LNG tank case monitor in real time in railway transport course according to claim 1, it is characterised in that: in step D, it may also be useful to the port of fixing port or reception data packet sends reply data bag.
- 5. the implementation method of LNG tank case monitor in real time in railway transport course according to claim 1, it is characterised in that: in stepb, data packet also comprises cell voltage data.
- 6. the implementation method of LNG tank case monitor in real time in railway transport course according to claim 1, it is characterised in that: when alarm occurs in instrument, wireless instrument sends data packet immediately.
- 7. the implementation method of LNG tank case monitor in real time in railway transport course according to claim 1, it is characterised in that: in step D, the reply data bag of transmission comprises whole contents that wireless instrument sends over data packet; In step e, judge the content in reply data bag, from transmit queue, delete corresponding data packet.
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| WO2019043868A1 (en) * | 2017-08-31 | 2019-03-07 | 石油資源開発株式会社 | Transportation management system for railway transportation of lng tank containers and transportation management device |
| CN109949561A (en) * | 2019-03-29 | 2019-06-28 | 中海石油气电集团有限责任公司 | A kind of LNG tank case data transmission method based on Beidou technology |
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| CN101325511A (en) * | 2008-03-05 | 2008-12-17 | 中科院嘉兴中心微系统所分中心 | Sensing network system for monitoring vehicle-mounted hazardous article and monitoring method |
| US7554442B2 (en) * | 2005-06-17 | 2009-06-30 | Terahop Networks, Inc. | Event-driven mobile hazmat monitoring |
| CN101555991A (en) * | 2009-05-21 | 2009-10-14 | 北京航空航天大学 | Wireless sensor network node device of safety monitoring of natural gas pipe network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7554442B2 (en) * | 2005-06-17 | 2009-06-30 | Terahop Networks, Inc. | Event-driven mobile hazmat monitoring |
| CN101325511A (en) * | 2008-03-05 | 2008-12-17 | 中科院嘉兴中心微系统所分中心 | Sensing network system for monitoring vehicle-mounted hazardous article and monitoring method |
| CN101555991A (en) * | 2009-05-21 | 2009-10-14 | 北京航空航天大学 | Wireless sensor network node device of safety monitoring of natural gas pipe network |
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