CN111898716B - Method and system for automatically matching and tracking iron frame number and ladle number based on RFID (radio frequency identification) identification technology - Google Patents
Method and system for automatically matching and tracking iron frame number and ladle number based on RFID (radio frequency identification) identification technology Download PDFInfo
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- CN111898716B CN111898716B CN202010762831.8A CN202010762831A CN111898716B CN 111898716 B CN111898716 B CN 111898716B CN 202010762831 A CN202010762831 A CN 202010762831A CN 111898716 B CN111898716 B CN 111898716B
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- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a method for automatically matching and tracking a iron frame number and a ladle number based on an RFID (radio frequency identification) identification technology, which only aims at the maximum value and the minimum value in effective data to judge the running state of the iron frame, greatly improves the operation speed, has the identification and matching accuracy rate of over 99 percent, accurately tracks the state of each link of a ladle, provides basic original data for analyzing the ladle of a blast furnace, and also provides a system for the method for automatically matching and tracking the iron frame number and the ladle number based on the RFID identification technology.
Description
Technical Field
The invention relates to the technical field of RFID (radio frequency identification), in particular to a method and a system for automatically matching and tracking a iron frame number and a ladle number based on an RFID technology.
Background
The core of the new molten iron supply technology developed in the steel industry in recent years is that the same ladle is used for tapping the blast furnace, transporting the molten iron, desulfurizing the molten iron in a steelmaking workshop and adding the molten iron into a converter, and the ladle is not poured in the middle. In order to monitor the position and state of a ladle in real time, an RFID identification technology is introduced and applied to a one-pot process, and a dynamic monitoring method and a monitoring system for the position of a molten iron transportation vehicle in a patent document CN101574977B disclose that an RFID automatic vehicle identification system reads vehicle information and transmits corresponding information to determine the real-time position of the vehicle on a railway track topological structure and display the content on a terminal; patent document CN106225892A discloses a crane molten steel metering method and system, wherein an RFID identifier is arranged at a converter tapping position, whether the crane is arranged at the converter tapping position or not is identified through an RFID radio frequency technology, and a computer reads the tag number of an RFID tag on the crane through the RFID identifier. However, the RFID identification technology applied to the one-pot technology still has a large problem, because of the small space of the site or the design of the running lines of the ladle, when two running lines of the ladle are close, the condition that the information collected by the identifier is interfered can occur, the identifier can collect the information of the ladle on the two lines at the same time, or collect invalid data, and the traditional mode is to process the data one by one according to the sequence of the collected cards, so that the processing speed is low, and once abnormal data or interference data are difficult to filter out, the identification accuracy is low and the effect is not ideal. The above problems seriously affect the normal operation of the production process of one can, so it is necessary to provide a method and a system for automatically matching and tracking the iron frame number and the ladle number based on the RFID identification technology, which can avoid signal interference.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a method and a system for automatically matching and tracking a iron frame number and a ladle number based on an RFID (radio frequency identification) identification technology, which can analyze and filter data by the method based on the RFID identification technology, thereby solving the problem that the identification of an RFID tag in a production flow of one can is interfered to influence the production of one can.
The technical aim of the invention is realized by the following technical scheme:
a method for automatically matching and tracking a iron frame number and a ladle number based on an RFID identification technology comprises the following steps,
s1, a plurality of identifiers are arranged on one side of a rail running on an iron stand in the same direction, the same side refers to the side of the rail facing the same direction no matter how the trend of the rail changes, RFID identification cards on two sides of a ladle or the iron stand are encoded into an identification system code, and data represented by the identification system code are stored in a database;
s2, extracting identification system codes of RFID identification cards of all the iron stand acquired by the identifiers within a certain time period, extracting corresponding data in a database according to the acquired identification system codes, reserving the data of identification points with the same azimuth as the azimuth of the identifiers as effective data according to the azimuth of the identifiers, and filtering the data with different azimuth of the identification points of the identifiers as interference data;
s3, using group grouping to the effective data, extracting the maximum value and the minimum value of each group of data, and judging according to the maximum value and the minimum value;
if the maximum value is the same as the minimum value, the group of data does not need to be processed, and the next group of data is skipped to be processed;
if the maximum value and the minimum value are different, acquiring complete line data of the maximum value and complete line data of the minimum value, and acquiring label directions of the maximum value and the minimum value, wherein the label directions represent left and right positions of the RFID identification card on the iron stand or the ladle;
s4, if the directions of the maximum value and the minimum value are the same, indicating that the running direction of the iron stand is unchanged, searching whether an effective ladle label exists between the maximum value and the minimum value, if the effective ladle label does not exist, transferring the data with the identification point smaller than the maximum value to a historical data table for storage, deleting the data with the identification point smaller than the maximum value, indicating the final running direction of the iron stand by the complete line data of the maximum value, judging that the iron stand is over and not carrying the iron ladle, if the effective ladle label exists, transferring the data with the identification point smaller than the minimum value to the historical data table for storage, deleting the data with the identification point smaller than the minimum value, indicating the running direction of the iron stand when the iron stand is firstly carrying the iron ladle by the complete line data of the minimum value, matching the effective ladle with the iron stand, and judging that the iron stand carries the iron stand;
if the directions of the labels of the maximum value and the minimum value are different, the movement direction of the iron stand is changed, and different logic operations can be executed according to whether the requirements of the ladle and the iron stand are tracked or matched;
s5, if the ladle is matched with the iron stand, searching for a ladle number which is effectively scanned between the maximum value and the minimum value in the effective data acquired by the iron stand at the identification point, if the effective ladle is not found, judging that the iron stand is empty, and if the effective ladle is found, judging that the effective ladle is matched with the iron stand and judging that the iron stand carries the ladle;
if the identification point of the identifier only tracks the iron stand, all information of the iron stand passing through the identification point is saved, and the iron stand does not need to be matched with the ladle.
In one embodiment, the complete data of the valid data collected by the identifier at least includes a serial number, a data creation time, an RFID tag ID, an RFID tag IP, a ladle or cradle identification system code, an RFID tag repetition rate, an RFID timestamp, an RFID tag signal strength, a server time, a server IP, and an Oracle database call time.
In one embodiment, the identification system code of the ladle or the iron stand is an 8-bit digital code, wherein the 1 st to 3 rd digits from the left represent the system identification number of the ladle or the iron stand, the 4 th to 6 th digits represent the number of the ladle or the iron stand, the 7 th digits represent the trend of the ladle or the iron stand, and the 8 th digits represent the direction in which the RFID tag is located on the ladle or the iron stand.
In one embodiment, the trend of the ladle or the iron stand is eastward or westward, and the trend of the iron stand is judged according to the 7 th bit digital code of the iron stand identification system in the complete data of the maximum value or the minimum value; the RFID tag is positioned on the ladle or the iron stand in the direction of the south or the north of the ladle or the iron stand, the identifier collects data and judges whether the collected data is the same as the position direction of the identifier according to the 8 th digit encoded by the recognition system of the iron stand, and the direction of the RFID tag on the ladle or the iron stand is the south or the north of the ladle or the iron stand, so that the advancing direction of the iron stand or the ladle is east or west.
In one embodiment, the valid data is arranged from small to large with the RFID's time stamp.
In one embodiment, the effective ladle is determined according to the number of times the ladle identifier collects data, the largest number of times being the effective ladle, and the remaining data being processed as interference data or anomaly data.
The system for automatically matching and tracking the iron frame number and the ladle number based on the RFID identification technology comprises an identification module, a video recording module, an acquisition and analysis module and a data storage module, wherein the acquisition and analysis module adopts the method for automatically matching and tracking the iron frame number and the ladle number based on the RFID identification technology;
the identification module comprises an RFID identification card arranged on the outer side of the iron stand or the ladle and an identifier which is arranged on the operation line and used for identifying and collecting information of the RFID identification card, the RFID identification card records information of the iron stand or the ladle, and the identifier is in communication connection with the collection analysis module;
the video recording module comprises a camera arranged above an operation line and a video recorder in communication connection with the camera, and the video recorder is in communication connection with the data storage module;
the acquisition and analysis module is in communication connection with the data storage module, receives the data acquired by the identifier in real time, filters interference information according to the time sequence of the data acquired by the identifier, analyzes the real-time position of the iron stand or the ladle, and displays dynamic data in real time;
the data storage module includes a server that can run an acquisition analysis program and has an Oracle database.
In one embodiment, the RFID identification card is a high temperature resistant identification card, and is disposed on an installation portion on the outer side of the iron stand or the ladle, and a heat insulation material is disposed in the installation portion, and because the temperature of the ladle is between 600 ℃ and 1000 ℃, the RFID identification card on the outer side of the ladle follows the ladle to move circularly in the whole production process, so that a heat insulation material is required to be disposed between the ladle and the RFID identification card, and the RFID identification card is prevented from being damaged in a high temperature environment.
In one embodiment, the edge of the identifier is provided with a protective cover, and because the identifier needs to be close to the RFID identification card when information is acquired, the protective cover at the edge of the identifier can effectively prevent impurities at high temperature from falling on the identifier to cause damage to the identifier.
In one embodiment, the identifiers are all arranged on one side of the same orientation of the rail on which the iron stand runs.
The invention has the following beneficial effects:
the invention provides a method capable of simply, conveniently and quickly identifying a hob and a ladle and automatically matching, RFID identification cards on two sides of the ladle and the hob are encoded into an identification system code, data represented by the identification system code is stored in a database, a plurality of identifiers are arranged on one side of a rail running on the hob in the same direction, the same side refers to the fact that no matter how the trend of the rail changes, the identifiers are arranged on one side of the rail facing the same direction, the data of the hob and the ladle collected by all the identifiers at a specific identification point are reserved, the data of the RFID identification cards of the hob or the ladle in the same direction as the identification point are used as effective data, and the rest data are used as interference data for processing; the invention provides a system for a method for automatically matching and tracking a iron frame number and a ladle number based on an RFID identification technology, which can automatically identify the running direction of the iron frame number and the current running direction of the iron frame number or the current running state of the iron frame number, or the current loading state of the iron frame number, and the like, and accurately displays the current running state of the iron frame number or the current loading state of the iron frame number on a real-time analysis frame.
Drawings
Fig. 1 is a schematic view of the movement direction of an iron stand according to the present invention.
Description of the embodiments
The present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1, a plurality of identifiers are arranged on one side of the north of a rail on which the iron stand operates, and information of RFID identification cards close to the identifiers is collected, wherein 1-identifiers, 2-iron stand, 21-south RFID identification cards, 22-north RFID identification cards, 3-ladle, A1, A2 and A3-the identifiers which are operated by the same iron stand on the rail are collected.
A method for automatically matching and tracking a iron frame number and a ladle number based on an RFID identification technology comprises the following steps,
s1, a plurality of identifiers are arranged on one side of a rail running on an iron stand in the same direction, the same side refers to the side of the rail facing the same direction no matter how the trend of the rail changes, RFID identification cards on two sides of a ladle or the iron stand are encoded into an identification system code, and data represented by the identification system code are stored in a database;
s2, extracting identification system codes of RFID identification cards of iron frames collected by all the identifiers in a certain time period, extracting corresponding data in a database according to the collected identification system codes, reserving the data identical to the position and the orientation of the identification points of the identifiers as effective data according to the orientation of the identification points of the identifiers, arranging the effective data according to the RFID time stamp from small to large, wherein the effective data comprises identification system codes, filtering the data different from the identification points of the identifiers as interference data, wherein the identification system codes of the iron frames or the iron frames are 8-bit digital codes, the 1 st to 3 rd digits from left represent the system identification number of the iron frames or the iron frames, the 4 th to 6 th digits represent the number of the iron frames or the iron frames, the 7 th digits represent the trend of the iron frames or the iron frames, since the RFID tag is located on the ladle or the hob in a direction of the south (i.e., left) or north (i.e., right) of the ladle or the hob, the hob or the ladle is moved in an eastward direction, wherein the numeral 1 indicates the ladle or the hob is moved in an eastward direction, the numeral 5 indicates the ladle or the hob is moved in an eastward direction, the 8 th digit indicates the RFID tag is located on the ladle or the hob, wherein the numeral 1 indicates the RFID tag is located on the south of the ladle or the hob, the numeral 2 indicates the RFID tag is located on the north of the ladle or the hob, the identifier 1 in the A1 position collects the identification system code of the RFID identification card 22 in the north of the hob 2 when the hob 2 is moved to the A1 position, and since the RFID identification card 22 in the north of the hob 2 is on the same side as the identifier 1 in the A1 position, the data represented by valid data is similarly, when the hob 2 is moved to the A2 position or the A3 position, the identifier 1 in the A2 position or the A3 position collects the identification system code of the south RFID identification card 21 of the iron stand, the representative data is effective data, but at the moment, the identifier 1 in the A1 position can collect the identification system code of the north RFID identification card 22 of the iron stand 2, and the data represented by the identifier 1 in the A1 position is interference data and is matched with the data in the database because the identifier 1 in the A1 position and the north RFID identification card 22 of the iron stand 2 in the A2 position or the A3 position are on different sides;
as shown in the following table 1,
table 1 foundry ladle or iron stand number coding rules exemplify: 8-bit identification system code
if the maximum value is the same as the minimum value, indicating that the group of data is interference data, and jumping to process the next group of data without processing the group of data;
if the maximum value and the minimum value are different, acquiring complete line data of the maximum value and complete line data of the minimum value, and acquiring tag directions of the maximum value and the minimum value, wherein the tag directions represent two sides of the RFID identification card on the iron stand or the ladle, and the complete line data of the maximum value and the complete line data of the minimum value at least comprise serial numbers, data creation time, RFID tag ID, RFID tag IP, identification system codes of the ladle or the iron stand, repetition rate of the RFID tag, time stamp of the RFID, RFID tag signal intensity, server time, server IP and Oracle database calling time, and the maximum value (1242061324) and the minimum value (1242061266) of the serial numbers of the iron stand number 777838 are different as shown in the following tables 2 and 3, and continuing to S4;
table 2 full line data for minimum iron frame number 777838
if no valid ladle label exists, transferring the data with the identification point smaller than the maximum value to a historical data table for storage, deleting the data with the identification point smaller than the maximum value from the table, filtering out a lot of interference data and invalid data, using the complete line data of the maximum value to represent the running direction of the iron frame, judging that the iron frame is not loaded with the ladle, namely, the iron frame is in the air and moves to the east (the seventh digit of 77783811 is 1, representing the eastward movement of the iron frame), if the valid ladle label exists, transferring the data with the identification point smaller than the minimum value to the historical data table for storage, facilitating the later analysis and the data integrity, deleting the data with the identification point smaller than the minimum value from the table, filtering out a lot of interference data and invalid data, using the complete line data of the minimum value to represent the running direction of the iron frame when the iron frame is loaded with the ladle first, matching the valid ladle with the iron frame, judging that the iron frame carries the ladle, namely, the iron frame is in the westward movement of 777838 (the seventh digit of the iron frame is 62, representing the westward movement of the iron frame);
if the directions of the labels of the maximum value and the minimum value are different, the moving direction of the complete iron stand is changed, the iron stand enters a specific position and leaves the specific position, for example, a workshop, different logic operations can be executed according to whether the requirements are tracking or matching the ladle and the iron stand, and the operation of S5 is continued;
s5, the directions of the labels of the maximum value and the minimum value are different, the number of the ladle which is effectively scanned is found between the maximum value and the minimum value in the effective data collected by the iron stand at the identification point, if no effective ladle is found, the iron stand is judged to be empty, if the effective ladle is found, the effective ladle is judged to be matched with the iron stand, and the iron stand carrying ladle is judged to leave the specific position.
In general, only when entering and exiting from a ladle repairing room, the iron stand and the ladle are matched, and the other is that the road is only tracked, so that the accuracy of the current statistical analysis is more than 98%, the accuracy of the whole ladle system can be ensured to reach 100% through weighing intervention, and accurate tracking information is provided for other business systems of upper railway logistics.
The system for automatically matching and tracking the iron frame number and the ladle number based on the RFID identification technology comprises an identification module, a video recording module, an acquisition analysis module and a data storage module, wherein the acquisition analysis module adopts the method for automatically matching and tracking the iron frame number and the ladle number based on the RFID identification technology, can automatically identify the running direction of the iron frame number and the currently carried ladle number or empty frame on the iron frame number, tracks the ladle charge, the use condition and the like, displays the ladle charge, the use condition and the like on a picture in real time, and provides accurate information for analyzing the use of the ladle.
The identification module comprises an RFID identification card arranged on the outer side of the iron stand or the ladle and an identifier which is arranged on the running line for identifying and collecting information of the RFID identification card, wherein the RFID identification card records information of the iron stand or the ladle, the identifier is in communication connection with the collecting and analyzing module, and the identifiers are all arranged on one side of a rail running on the iron stand in the same direction;
the video recording module comprises a camera arranged above an operation line and a video recorder in communication connection with the camera, and the video recorder is in communication connection with the data storage module;
the acquisition and analysis module is in communication connection with the data storage module, receives the data acquired by the identifier in real time, filters interference information according to the time sequence of the data acquired by the identifier, analyzes the real-time position of the iron stand or the ladle, and displays dynamic data in real time;
the data storage module includes a server that can run an acquisition analysis program and has an Oracle database.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (10)
1. The method for automatically matching and tracking the iron frame number and the ladle number based on the RFID identification technology is characterized by comprising the following steps,
s1, a plurality of identifiers are arranged on one side of a rail running on an iron stand in the same direction, the same side refers to the side of the rail facing the same direction no matter how the trend of the rail changes, RFID identification cards on two sides of a ladle or the iron stand are encoded into an identification system code, and data represented by the identification system code are stored in a database;
s2, extracting identification system codes of RFID identification cards of all the iron stand acquired by the identifiers within a certain time period, extracting corresponding data in a database according to the acquired identification system codes, reserving the data of identification points with the same azimuth as the azimuth of the identifiers as effective data according to the azimuth of the identifiers, and filtering the data with different azimuth of the identification points of the identifiers as interference data;
s3, using group grouping to the effective data, extracting the maximum value and the minimum value of each group of data, and judging according to the maximum value and the minimum value;
if the maximum value is the same as the minimum value, the group of data does not need to be processed, and the next group of data is skipped to be processed;
if the maximum value and the minimum value are different, acquiring complete line data of the maximum value and complete line data of the minimum value, and acquiring label directions of the maximum value and the minimum value, wherein the label directions represent left and right positions of the RFID identification card on the iron stand or the ladle;
s4, if the directions of the maximum value and the minimum value are the same, indicating that the running direction of the iron stand is unchanged, searching whether an effective ladle label exists between the maximum value and the minimum value, if the effective ladle label does not exist, transferring the data with the identification point smaller than the maximum value to a historical data table for storage, deleting the data with the identification point smaller than the maximum value, indicating the final running direction of the iron stand by the complete line data of the maximum value, judging that the iron stand is over and not carrying the iron ladle, if the effective ladle label exists, transferring the data with the identification point smaller than the minimum value to the historical data table for storage, deleting the data with the identification point smaller than the minimum value, indicating the running direction of the iron stand when the iron stand is firstly carrying the iron ladle by the complete line data of the minimum value, matching the effective ladle with the iron stand, and judging that the iron stand carries the iron stand;
if the directions of the labels of the maximum value and the minimum value are different, the movement direction of the iron stand is changed, and different logic operations can be executed according to whether the requirements of the ladle and the iron stand are tracked or matched;
s5, if the ladle is matched with the iron stand, searching for a ladle number which is effectively scanned between the maximum value and the minimum value in the effective data acquired by the iron stand at the identification point, if the effective ladle is not found, judging that the iron stand is empty, and if the effective ladle is found, judging that the effective ladle is matched with the iron stand and judging that the iron stand carries the ladle;
if the identification point of the identifier only tracks the iron stand, all information of the iron stand passing through the identification point is saved, and the iron stand does not need to be matched with the ladle.
2. The method for automatically matching and tracking a ladle number with a ladle number based on an RFID identification technology according to claim 1, wherein the complete data of the valid data collected by the identifier at least comprises a serial number, a data creation time, an RFID tag ID, an RFID tag IP, a ladle or ladle identification system code, an RFID tag repetition rate, an RFID timestamp, an RFID tag signal strength, a server time, a server IP and an Oracle database call time.
3. The method for automatically matching and tracking the iron ladle number and the iron ladle number based on the RFID identification technology according to claim 2, wherein the identification system code of the iron ladle or the iron ladle is an 8-bit digital code, wherein the 1 st to 3 rd digits from the left represent the system identification number of the iron ladle or the iron ladle, the 4 th to 6 th digits represent the number of the iron ladle or the iron ladle, the 7 th digits represent the trend of the iron ladle or the iron ladle, and the 8 th digits represent the direction in which the RFID tag is positioned on the iron ladle or the iron ladle.
4. The method for automatically matching and tracking the iron frame number and the ladle number based on the RFID identification technology according to claim 3, wherein the trend of the ladle or the iron frame is eastward or westward, and the trend of the iron frame is judged according to the 7 th bit digital code of the iron frame identification system in the complete data of the maximum value or the minimum value; the RFID tag is positioned on the ladle or the iron stand in the direction of the south or the north of the ladle or the iron stand, the identifier collects data and judges whether the collected data is the same as the position direction of the identifier according to the 8 th digit coded by the identification system of the iron stand.
5. The method for automatically matching and tracking a iron stand number with a ladle number based on an RFID identification technology according to any one of claims 1-4, wherein valid data are arranged from small to large according to the time stamp of the RFID.
6. The method for automatically matching and tracking a iron frame number with a ladle number according to the RFID identification technology of claim 1, wherein the effective ladle is determined according to the number of times the ladle identifier collects data, the largest number of times is the effective ladle, and the rest of the data is processed as interference data or abnormal data.
7. The system for automatically matching and tracking the iron frame number and the ladle number based on the RFID identification technology comprises an identification module, a video recording module, an acquisition and analysis module and a data storage module, and is characterized in that the acquisition and analysis module adopts the method for automatically matching and tracking the iron frame number and the ladle number based on the RFID identification technology according to any one of claims 1-6;
the identification module comprises an RFID identification card arranged on the outer side of the iron stand or the ladle and an identifier which is arranged on the operation line and used for identifying and collecting information of the RFID identification card, the RFID identification card records information of the iron stand or the ladle, and the identifier is in communication connection with the collection analysis module;
the video recording module comprises a camera arranged above an operation line and a video recorder in communication connection with the camera, and the video recorder is in communication connection with the data storage module;
the acquisition and analysis module is in communication connection with the data storage module, receives the data acquired by the identifier in real time, filters interference information according to the time sequence of the data acquired by the identifier, analyzes the real-time position of the iron stand or the ladle, and displays dynamic data in real time;
the data storage module includes a server that can run an acquisition analysis program and has an Oracle database.
8. The system for automatically matching and tracking the iron frame number and the ladle number based on the RFID identification technology according to claim 7, wherein the RFID identification card is a high-temperature resistant identification card and is arranged on an installation part on the outer side of the iron frame or the ladle, and a heat insulation material is arranged in the installation part.
9. The system for automatically matching tracking iron stand number with ladle number based on RFID identification technology as recited in claim 8, wherein said identifier edge is provided with a protective cover.
10. The system for automatically matching and tracking a hob number with a ladle number based on an RFID identification technology according to claim 9, wherein the identifiers are all arranged on one side of the same orientation of the rail on which the hob runs.
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