CN116296956A - Hobbing cutter abrasion detection method and device - Google Patents
Hobbing cutter abrasion detection method and device Download PDFInfo
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Abstract
The invention provides a hob abrasion detection method and device, wherein the method comprises the following steps: acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead; determining the instantaneous wear of the hob according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead; the instantaneous wear amount of the hob and the corresponding instantaneous time, the current ring number and the changing time of the hob are used as instantaneous wear amount data of the hob to be written into a database; extracting hob instantaneous wear data from a database according to a preset mode, and determining a data set; determining the minimum number of the abrasion loss according to the data set; determining the current hob abrasion loss from the data set according to the minimum abrasion loss identification number and the data continuous judging result; the data continuity judging result is obtained by judging the data continuity of the data set. The method solves the problems of low engineering practicability, poor calculation accuracy and the like of the existing hob abrasion detection method, and realizes accurate calculation of the hob abrasion loss of the shield machine.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a hob abrasion detection method and device.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
The shield machine construction process can meet various geological conditions, such as sandy gravel stratum, composite stratum and the like, the hard stratum can lead to rapid abrasion of the cutter of the shield machine, even the cutter of the shield machine can be damaged, once a certain cutter on the cutter disc breaks down, the adjacent cutter can be rapidly influenced, the service life of the adjacent cutter is reduced, the whole cutter disc and the tunneling efficiency of the shield machine are further influenced, and the cutter on the cutter disc of the shield machine can be timely replaced when the certain cutter on the cutter disc of the shield machine is worn more or breaks down.
In recent years, with the continuous progress and development of sensing technology and computer technology, many experts and scholars develop a method for calculating the abrasion loss of a cutter, one way is to judge whether a hob reaches a limit abrasion state by installing an upper displacement sensor and a lower displacement sensor, when the hob reaches a set limit abrasion loss value, the method can judge that the hob reaches the limit abrasion loss, and the method cannot judge the abrasion loss of the hob before the hob does not reach the limit abrasion, so that on-site constructors cannot carry out planned cutter replacement and maintenance. In another mode, the hob abrasion loss of the shield machine cannot be accurately calculated by an image recognition method, although the hob image is shot through a camera to further realize the identification of the hob abrasion loss, in the actual tunneling process of the shield machine, the surface of a cutter is often wrapped with slurry or dregs. The existing shield machine hob abrasion detection method has the problems of weak engineering practicability, poor calculation accuracy and the like. Therefore, it is necessary to design a hob abrasion detection method and a hob abrasion detection system which are strong in practicability and high in calculation accuracy.
Therefore, how to provide a new solution to the above technical problem is a technical problem to be solved in the art.
Disclosure of Invention
The embodiment of the invention provides a hob abrasion detection method, which solves the problems of low engineering practicability, poor calculation accuracy and the like of the existing hob abrasion detection method and realizes the accurate calculation of the hob abrasion loss of a shield machine, and the method comprises the following steps:
acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
determining the instantaneous wear of the hob according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
the instantaneous wear amount of the hob and the corresponding instantaneous time, the current ring number and the changing time of the hob are used as instantaneous wear amount data of the hob to be written into a database;
extracting hob instantaneous wear data from a database according to a preset mode, and determining a data set;
determining the minimum number of the abrasion loss according to the data set;
determining the current hob abrasion loss from the data set according to the minimum abrasion loss identification number and the data continuous judging result; the data continuity judging result is obtained by judging the data continuity of the data set.
The embodiment of the invention also provides a hob abrasion detection device, which comprises:
the rotating speed acquisition module is used for acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
the hob instantaneous wear amount determining module is used for determining the hob instantaneous wear amount according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
the hob instantaneous wear amount data writing module is used for writing the hob instantaneous wear amount, the corresponding instantaneous moment, the current ring number and the hob changing moment of the hob into a database as one hob instantaneous wear amount data;
the data set determining module is used for extracting the instantaneous wear amount data of the hob from the database according to a preset mode and determining a data set;
the minimum abrasion loss identification number determining module is used for determining the minimum abrasion loss identification number according to the data set;
the current hob abrasion loss determining module is used for determining the current hob abrasion loss from the data set according to the minimum abrasion loss identification number and the data continuous judging result; the data continuity judging result is obtained by judging the data continuity of the data set.
The embodiment of the invention also provides computer equipment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the hob abrasion detection method is realized when the processor executes the computer program.
The embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the hob abrasion detection method when being executed by a processor.
The embodiment of the invention also provides a computer program product, which comprises a computer program, wherein the computer program is executed by a processor to realize the hob abrasion detection method.
The hob abrasion detection method and device provided by the embodiment of the invention comprise the following steps: acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead; determining the instantaneous wear of the hob according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead; the instantaneous wear amount of the hob and the corresponding instantaneous time, the current ring number and the changing time of the hob are used as instantaneous wear amount data of the hob to be written into a database; extracting hob instantaneous wear data from a database according to a preset mode, and determining a data set; determining the minimum number of the abrasion loss according to the data set; determining the current hob abrasion loss from the data set according to the minimum abrasion loss identification number and the data continuous judging result; the data continuity judging result is obtained by judging the data continuity of the data set. The invention provides a hob abrasion detection method, which can obtain the current hob abrasion after each ring of tunneling of a shield machine is completed by calculating the hob instantaneous abrasion loss in real time, can timely obtain the abrasion condition of a hob, and solves the problems of low engineering practicability, poor calculation accuracy and the like of the existing hob abrasion detection method, thereby realizing accurate calculation of the hob abrasion loss of the shield machine.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a schematic diagram of a hob abrasion detection method according to an embodiment of the present invention.
FIG. 2 is a flow chart of a hob abrasion detection method according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a process for determining a data set of a hob abrasion detection method according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a process of determining the minimum number of the determined wear amounts in the hob wear detection method according to the embodiment of the present invention.
FIG. 5 is a schematic diagram of a process of determining the current hob abrasion loss in the hob abrasion detection method according to the embodiment of the present invention.
FIG. 6 is a schematic diagram of a computer device for carrying out a hob abrasion detection method embodying the present invention.
Fig. 7 is a schematic diagram of a hob abrasion detection device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings. The exemplary embodiments of the present invention and their descriptions herein are for the purpose of explaining the present invention, but are not to be construed as limiting the invention.
Fig. 1 is a schematic diagram of a hob abrasion detection method according to an embodiment of the present invention, and as shown in fig. 1, the embodiment of the present invention provides a hob abrasion detection method, which solves the problems of poor engineering practicability, poor calculation accuracy, etc. of the existing hob abrasion detection method, and realizes accurate calculation of a hob abrasion loss of a shield machine, and the method includes:
step 101: acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
step 102: determining the instantaneous wear of the hob according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
step 103: the instantaneous wear amount of the hob and the corresponding instantaneous time, the current ring number and the changing time of the hob are used as instantaneous wear amount data of the hob to be written into a database;
step 104: extracting hob instantaneous wear data from a database according to a preset mode, and determining a data set;
step 105: determining the minimum number of the abrasion loss according to the data set;
step 106: determining the current hob abrasion loss from the data set according to the minimum abrasion loss identification number and the data continuous judging result; the data continuity judging result is obtained by judging the data continuity of the data set.
The hob abrasion detection method provided by the embodiment of the invention comprises the following steps: acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead; determining the instantaneous wear of the hob according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead; the instantaneous wear amount of the hob and the corresponding instantaneous time, the current ring number and the changing time of the hob are used as instantaneous wear amount data of the hob to be written into a database; extracting hob instantaneous wear data from a database according to a preset mode, and determining a data set; determining the minimum number of the abrasion loss according to the data set; determining the current hob abrasion loss from the data set according to the minimum abrasion loss identification number and the data continuous judging result; the data continuity judging result is obtained by judging the data continuity of the data set. The invention provides a hob abrasion detection method, which can obtain the current hob abrasion after each ring of tunneling of a shield machine is completed by calculating the hob instantaneous abrasion loss in real time, can timely obtain the abrasion condition of a hob, and solves the problems of low engineering practicability, poor calculation accuracy and the like of the existing hob abrasion detection method, thereby realizing accurate calculation of the hob abrasion loss of the shield machine.
Fig. 2 is a flowchart of a hob abrasion detection method according to an embodiment of the present invention, and as shown in fig. 2, when the hob abrasion detection method according to the embodiment of the present invention is implemented, in one embodiment, the method includes:
acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
determining the instantaneous wear of the hob according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
the instantaneous wear amount of the hob and the corresponding instantaneous time, the current ring number and the changing time of the hob are used as instantaneous wear amount data of the hob to be written into a database;
extracting hob instantaneous wear data from a database according to a preset mode, and determining a data set;
determining the minimum number of the abrasion loss according to the data set;
determining the current hob abrasion loss from the data set according to the minimum abrasion loss identification number and the data continuous judging result; the data continuity judgment result is obtained by carrying out data continuity judgment on the data set.
When the hob abrasion detection method provided by the embodiment of the invention is implemented, in one embodiment, the method for acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead comprises the following steps:
acquiring the real-time rotating speed V of the hob through a first rotating speed sensor arranged in the hob barrel 1 ；
Obtaining the cutterhead through a second rotating speed sensor arranged on the cutterheadReal-time rotation speed V 2 。
In order to realize accurate calculation of the abrasion loss of the hob, the embodiment needs to be provided with a rotating speed sensor, wherein a first rotating speed sensor is arranged in a hob barrel, a second rotating speed sensor is arranged on a transmission shaft of a hob, the rotating speed sensor is used for acquiring real-time rotating speed, specifically, the real-time rotating speed of the hob can be acquired through the first rotating speed sensor arranged in the hob barrel, and the real-time rotating speed of the hob can be acquired through the second rotating speed sensor arranged on the hob. Through installing the rotation speed sensor on hobbing cutter section of thick bamboo and blade disc, owing to rotation speed sensor is small, and does not install on the construction face, both can avoid additionally increasing detection device and lead to the reduction of tunneling efficiency, does not influence normal construction face moreover.
When the hob abrasion detection method provided by the embodiment of the invention is implemented, in one embodiment, the method for determining the instantaneous hob abrasion loss according to the real-time hob rotation speed and the real-time hob rotation speed comprises the following steps:
according to the real-time rotating speed V of the hob 1 And real-time rotating speed V of cutter head 2 And determining the instantaneous wear W of the hob through a rotation speed ratio S by combining the theoretical radius R of the hob with the radius R of the tool path.
When the hob abrasion detection method provided by the embodiment of the invention is implemented, in one embodiment, the instantaneous hob abrasion loss is determined according to the following mode:
W＝r×(1-100/S)
S＝(V 1 ×100)/[(V 2 ×R)/r] (1)
wherein W is the instantaneous abrasion loss of the hob; v (V) 1 The real-time rotating speed of the hob is set; v (V) 2 The real-time rotating speed of the cutterhead is set; r is the theoretical radius of the hob; r is the radius of the tool path; s is the rotation speed ratio. Wherein in one example, the instantaneous wear of the hob is rounded in millimeters.
The above-mentioned expression for determining the instantaneous wear of the hob is given as an example, and it will be understood by those skilled in the art that the above-mentioned expression may be modified and other parameters or data may be added according to the need, or other specific expressions may be provided, and these modifications are within the scope of the present invention.
In the embodiment, the instantaneous wear amount W of the hob, the corresponding instantaneous time T, the current ring number N and the changing time T of the hob are used as instantaneous wear amount data of the hob to be written into a database.
Fig. 3 is a schematic diagram of a process of determining a data set of a hob abrasion detection method according to an embodiment of the present invention, and as shown in fig. 3, when the hob abrasion detection method according to the embodiment of the present invention is implemented, in one embodiment, instantaneous hob abrasion loss data is extracted from a database according to a preset manner, and the determining a data set includes:
step 301: when the ring number in the PLC changes, the instantaneous wear data of the hob in the previous ring is extracted from a database, and whether the change of the hob occurs in the previous ring is judged;
step 302: if the cutter changing occurs in the last ring, the instantaneous wear amount data of the hob from the moment of cutter changing to the finishing of the tunneling of the last ring in the last ring is used as a data set, and the value of the wear amount of the cutter before the change of the ring number is equal to zero.
When the hob abrasion detection method provided by the embodiment of the invention is implemented, in one embodiment, the hob abrasion detection method further comprises the following steps: if the tool change does not occur in the previous ring, the instantaneous wear amount data of the hob of the whole ring in the previous ring is used as a data set, and the wear amount of the tool before the change of the ring number is recorded.
In the embodiment, whether the ring number in the PLC (Programmable Logic Controller ) is changed or not is monitored, when the ring number in the PLC is changed, the instantaneous wear amount data of the hob in the previous ring is extracted from a database, the change time t of the hob in the instantaneous wear amount data of the hob is utilized to judge whether the change of the hob occurs in the previous ring, if the change of the hob occurs in the previous ring, a plurality of pieces of instantaneous wear amount data of the hob corresponding to the moment from the moment of changing the hob to the moment when the tunneling of the previous ring is completed are taken as a data set C, and the wear amount m=0 of the hob before the change of the ring number is recorded; if the tool change does not occur in the previous ring, taking the instantaneous wear amount data of a plurality of hob in the whole ring in the previous ring as a data set C, and recording the wear amount m of the tool before the change of the ring number; the cutter abrasion loss before the ring number change can be calculated according to the instantaneous abrasion loss data of the hob in the data set, or can be obtained by direct measurement and record when the tunneling of each ring is finished.
Fig. 4 is a schematic diagram illustrating a process of determining the minimum number of identified wear amounts in the hob wear detection method according to the embodiment of the present invention, and as shown in fig. 4, when the hob wear detection method according to the embodiment of the present invention is implemented, in one embodiment, determining the minimum number of identified wear amounts according to a data set includes:
step 401: removing the abnormal value in the data set through an abnormal value removing algorithm;
step 402: and determining the minimum number of the determined abrasion loss according to the number of the data of the instantaneous abrasion loss of the hob in the removed data set.
In the embodiment, abnormal values in the data set are removed through abnormal value removing algorithms such as a box graph algorithm and a clustering algorithm, and then the minimum abrasion loss identification number a is determined according to the number A of the instantaneous abrasion loss data of the hob in the removed data set.
When the hob abrasion detection method provided by the embodiment of the invention is implemented, in one embodiment, abnormal values in a data set are removed through an abnormal value removing algorithm, and the method comprises the following steps:
setting a cutter abrasion loss threshold range, and deleting the instantaneous cutter abrasion loss data which do not fall in the cutter abrasion loss threshold range in the data set;
and judging the abnormal value of the current data set through a box graph algorithm and/or a clustering algorithm, and eliminating the abnormal value from the current data set.
In the embodiment, according to actual operation data, the cutter abrasion loss is generally between 0 and 50mm, so that the cutter abrasion loss threshold range can be set to be 0 to 50mm, the cutter abrasion loss cannot be smaller than 0mm and cannot be larger than 50mm (cutter replacement is carried out before the abrasion loss reaches 50 mm), therefore, whether data in a data set falls within the cutter abrasion loss threshold range can be judged, when the abrasion loss of the data in the last ring of data set is smaller than 0 or larger than 50mm, the data does not fall within the cutter abrasion loss threshold range, abnormal data which are usually caused by various reasons such as a sensor are displayed, when abnormal data which can be judged directly are subjected to abnormal value elimination, the abnormal value can be eliminated by adopting an abnormal value elimination algorithm, and the accuracy of abnormal value elimination can be improved.
When the hob abrasion detection method provided by the embodiment of the invention is implemented, in one embodiment, the minimum abrasion loss identification number is determined according to the following mode:
a＝A×p (2)
wherein a is the minimum number of abrasion loss; a is the number of the instantaneous abrasion loss data of the hob; p is the minimum percent of wear. Specifically, the p value is determined by the site construction working condition, and is generally 1%; when a is more than or equal to 2, the method is reserved, and when a is less than 2, the method is set to be 2.
The above-mentioned expression for determining the minimum number of wear is given as an example, and it will be understood by those skilled in the art that the above-mentioned expression may be modified and other parameters or data may be added according to the need, or other specific expressions may be provided, and these modifications are within the scope of the present invention.
Fig. 5 is a schematic diagram of a process of determining a current hob abrasion loss in the hob abrasion loss detection method according to the embodiment of the present invention, and as shown in fig. 5, when the hob abrasion loss detection method according to the embodiment of the present invention is implemented, in one embodiment, the determining the current hob abrasion loss from the data set according to the minimum number of considered abrasion loss includes:
step 501: rounding the hob instantaneous wear amount data of the data set according to a preset size, calculating the same number of the rounded hob instantaneous wear amount data in the data set, and arranging the rounded hob instantaneous wear amount data in order from small to large;
step 502: judging whether the number of data of the maximum value of the instantaneous wear amount data of the hob in the data set is larger than the minimum identification number of the wear amount;
step 503: if the number of the data of the maximum value of the instantaneous wear amount data of the hob in the data set is not more than the minimum rated number of the wear amount, deleting the instantaneous wear amount data of the hob from the data set, and selecting the instantaneous wear amount data of the hob from the data set again to compare and judge with the minimum rated number of the wear amount until the number of the data of the maximum value of the instantaneous wear amount data of the hob in the data set is more than the minimum rated number of the wear amount;
step 504: judging whether the maximum value of the instantaneous wear amount data of the hob in the data set and other instantaneous wear amount data of the hob except the maximum value meet the data continuity or not based on the fact that the number of the data of the maximum value of the instantaneous wear amount data of the hob in the data set is larger than the minimum identification number of the wear amount;
step 505: if the data continuity is judged not to be met, deleting the maximum value of the instantaneous wear amount data of the hob from the data set, selecting the instantaneous wear amount data of the hob from the data set again, comparing and judging the minimum identification number of the wear amount data of the hob, and outputting the maximum value of the instantaneous wear amount data of the hob in the current data set until the maximum value of the instantaneous wear amount data of the hob in the data set and the instantaneous wear amount data of other hob except the maximum value meet the data continuity;
step 506: judging the maximum value of the instantaneous wear amount data of the hob in the current data set and the wear amount of the cutter before the change of the ring number;
step 507: if the maximum value of the instantaneous wear amount data of the hob in the current data set is larger than the wear amount of the cutter before the ring number is changed, taking the instantaneous wear amount data of the hob in the current data set as the current wear amount of the hob;
step 508: and if the maximum value of the instantaneous cutter abrasion loss data of the cutter in the current data set is smaller than or equal to the cutter abrasion loss before the change of the ring number, taking the cutter abrasion loss before the change of the ring number as the current cutter abrasion loss.
In an embodiment, the data in the data set C are rounded in millimeters, the same number of each data in the data set is calculated, and the wear data are ordered from small to large.
Judging whether the number of the data with the largest instantaneous abrasion loss in the data set C is larger than a, if not, deleting the data in the data set until the number of the data with the largest instantaneous abrasion loss in the data set C is larger than a.
When the number of the data with the largest instantaneous abrasion loss in the data set C is larger than a, judging whether the maximum abrasion loss is continuous with other instantaneous abrasion loss data, if not, deleting the data in the data set C, and returning to the previous step until the maximum abrasion loss in the data set C is continuous with other instantaneous abrasion loss data, and outputting the maximum instantaneous abrasion loss in the data set C at the moment; judging the magnitude between the maximum value of the instantaneous wear amount in the data set C and the cutter wear amount m before the ring number change, and taking the data of the instantaneous wear amount of the hob in the current data set C as the current hob wear amount if the maximum value of the instantaneous wear amount data of the hob in the current data set C is larger than the cutter wear amount m before the ring number change; and if the maximum value of the instantaneous cutter abrasion loss data of the hob in the current data set C is smaller than or equal to the cutter abrasion loss m before the change of the ring number, taking the cutter abrasion loss m before the change of the ring number as the current cutter abrasion loss.
Specifically, as the abrasion loss of the hob is only larger and larger along with the tunneling of the shield machine, if the abrasion loss of the current ring is smaller than that of the previous ring, the abrasion loss is obviously not in accordance with logic, if the ring is not changed before the ring number is changed, the abrasion loss m of the cutter before the ring number is changed is recorded, the abrasion loss m is compared with the calculated abrasion loss after the ring number is changed, and the abrasion loss is larger than the abrasion loss of the current ring; if the ring is changed before the ring number is changed, m is recorded as 0, and the calculated wear amount after the ring number is changed is larger than the calculated wear amount, and the calculated wear amount is the current wear amount of the ring.
When the hob abrasion detection method provided by the embodiment of the invention is implemented, in one embodiment, whether the data continuity is met is judged according to the following mode;
judging whether data with a first preset size and a second preset size smaller than the maximum value of the instantaneous wear amount data of the hob exist in the data set, and judging that the data continuity is met if the data with the first preset size and the data with the second preset size exist;
if either the first preset size or the second preset size does not exist, the data continuity is judged not to be met.
In the embodiment, if the first preset size is set to be 1mm and the second preset size is set to be 2mm, the method for judging whether the data set meets the data continuity is to judge whether the data set C has data smaller than the maximum value of the instantaneous wear amount by 1mm and 2 mm. If both exist, the data set is considered to satisfy the data continuity, and if one does not exist, the data is considered to not satisfy the data continuity.
Fig. 6 is a schematic diagram of a computer device for running a hob abrasion detection method according to the present invention, and as shown in fig. 6, an embodiment of the present invention further provides a computer device 600, including a memory 610, a processor 620, and a computer program 630 stored in the memory and capable of running on the processor, where the processor implements the hob abrasion detection method when executing the computer program.
The embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the hob abrasion detection method when being executed by a processor.
The embodiment of the invention also provides a computer program product, which comprises a computer program, wherein the computer program is executed by a processor to realize the hob abrasion detection method.
The embodiment of the invention also provides a hob abrasion detection device, which is described in the following embodiment. Because the principle of the device for solving the problem is similar to that of a hob abrasion detection method, the implementation of the device can refer to the implementation of the hob abrasion detection method, and the repetition is omitted.
Fig. 7 is a schematic diagram of a hob abrasion detection device according to an embodiment of the present invention, and as shown in fig. 7, the embodiment of the present invention further provides a hob abrasion detection device.
When the hob abrasion detection device provided by the embodiment of the invention is implemented, in one embodiment, the hob abrasion detection device comprises:
the rotating speed acquisition module 701 is used for acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
the hob instantaneous wear determination module 702 is configured to determine the hob instantaneous wear according to the hob real-time rotation speed and the cutterhead real-time rotation speed;
the hob instantaneous wear amount data writing module 703 is configured to write the hob instantaneous wear amount, the corresponding instantaneous time, the current ring number and the hob changing time of the hob into a database as one hob instantaneous wear amount data;
the data set determining module 704 is used for extracting the instantaneous wear amount data of the hob from the database according to a preset mode and determining a data set;
the minimum abrasion loss identification number determining module 705 is configured to determine a minimum abrasion loss identification number according to the data set;
the current hob abrasion loss determining module 706 is configured to determine a current hob abrasion loss from the data set according to the minimum abrasion loss identification number and the data continuous determination result; the data continuity judging result is obtained by judging the data continuity of the data set.
When the hob abrasion detection device provided by the embodiment of the invention is implemented, in one embodiment, the rotating speed acquisition module is specifically used for:
acquiring the real-time rotating speed of the hob through a first rotating speed sensor arranged in the hob barrel;
and acquiring the real-time rotating speed of the cutterhead through a second rotating speed sensor arranged on the cutterhead.
When the hob abrasion detection device provided by the embodiment of the invention is concretely implemented, in one embodiment, the hob instantaneous abrasion loss determination module is specifically used for:
and determining the instantaneous wear of the hob by combining the theoretical radius of the hob with the radius of the tool path according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead.
When the hob abrasion detection device provided by the embodiment of the invention is implemented, in one embodiment, the hob instantaneous abrasion loss determination module is further used for determining the hob instantaneous abrasion loss according to the formula (1).
When the hob abrasion detection device provided by the embodiment of the invention is implemented, in one embodiment, the data set determination module is specifically configured to:
when the ring number in the PLC changes, extracting instantaneous wear data of the hob in the previous ring from a database, and judging whether the hob replacement occurs in the previous ring or not;
and if the cutter changing occurs in the last ring, taking the instantaneous wear amount data of the hob from the moment of cutter changing to the finishing stop of the tunneling of the last ring in the last ring as a data set, and enabling the value of the wear amount of the cutter before the change of the ring number to be equal to zero.
When the hob abrasion detection device provided by the embodiment of the invention is implemented, in one embodiment, the data set determination module is further used for: and if the tool changing does not occur in the last ring, taking the instantaneous wear amount data of the hob of the whole ring in the last ring as a data set, and recording the wear amount of the tool before the ring number is changed.
When the hob abrasion detection device provided by the embodiment of the invention is concretely implemented, in one embodiment, the abrasion loss minimum identification number determination module is specifically used for:
removing the abnormal value in the data set through an abnormal value removing algorithm;
and determining the minimum number of the determined abrasion loss according to the number of the data of the instantaneous abrasion loss of the hob in the removed data set.
When the hob abrasion detection device provided by the embodiment of the invention is implemented, in one embodiment, the abrasion loss minimum identification number determination module is further used for:
setting a cutter abrasion loss threshold range, and deleting the instantaneous cutter abrasion loss data which do not fall in the cutter abrasion loss threshold range in the data set;
and judging the abnormal value of the current data set through a box graph algorithm and/or a clustering algorithm, and eliminating the abnormal value from the current data set.
In a specific implementation of the hob abrasion detection device provided by the embodiment of the invention, in one embodiment, the abrasion loss minimum identification number determination module is further used for determining the abrasion loss minimum identification number according to the formula (2).
When the hob abrasion detection device provided by the embodiment of the invention is implemented, in one embodiment, the current hob abrasion amount determination module is specifically used for:
rounding the hob instantaneous wear amount data of the data set according to a preset size, calculating the same number of the rounded hob instantaneous wear amount data in the data set, and arranging the rounded hob instantaneous wear amount data in order from small to large;
judging whether the number of data of the maximum value of the instantaneous wear amount data of the hob in the data set is larger than the minimum identification number of the wear amount;
if the number of the data of the maximum value of the instantaneous wear amount data of the hob in the data set is not more than the minimum rated number of the wear amount, deleting the instantaneous wear amount data of the hob from the data set, selecting the instantaneous wear amount data of the hob from the data set again, and comparing and judging the instantaneous wear amount data of the hob with the minimum rated number of the wear amount until the number of the data of the maximum value of the instantaneous wear amount data of the hob in the data set is more than the minimum rated number of the wear amount;
judging whether the maximum value of the instantaneous wear amount data of the hob in the data set and other instantaneous wear amount data of the hob except the maximum value meet the data continuity or not based on the fact that the number of the data of the maximum value of the instantaneous wear amount data of the hob in the data set is larger than the minimum identification number of the wear amount;
if the data continuity is judged not to be met, deleting the maximum value of the hob instantaneous wear amount data from the data set, selecting hob instantaneous wear amount data from the data set again, comparing and judging the minimum identification number of the wear amount data until the maximum value of the hob instantaneous wear amount data in the data set and other hob instantaneous wear amount data except the maximum value meet the data continuity, and outputting the maximum value of the hob instantaneous wear amount data in the current data set;
judging the maximum value of the instantaneous wear amount data of the hob in the current data set and the wear amount of the cutter before the change of the ring number;
if the maximum value of the instantaneous wear amount data of the hob in the current data set is larger than the wear amount of the cutter before the ring number is changed, taking the instantaneous wear amount data of the hob in the current data set as the current wear amount of the hob;
and if the maximum value of the instantaneous cutter abrasion loss data of the cutter in the current data set is smaller than or equal to the cutter abrasion loss before the change of the ring number, taking the cutter abrasion loss before the change of the ring number as the current cutter abrasion loss.
When the hob abrasion detection device provided by the embodiment of the invention is implemented, in one embodiment, the current hob abrasion amount determination module is further used for judging whether the data continuity is met according to the following mode;
judging whether data with a first preset size and a second preset size smaller than the maximum value of the instantaneous wear amount data of the hob exist in the data set, and judging that the data continuity is met if the data with the first preset size and the data with the second preset size exist;
if either the first preset size or the second preset size does not exist, the data continuity is judged not to be met.
In summary, the method and the device for detecting the hob abrasion provided by the embodiment of the invention comprise the following steps: acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead; determining the instantaneous wear of the hob according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead; the instantaneous wear amount of the hob and the corresponding instantaneous time, the current ring number and the changing time of the hob are used as instantaneous wear amount data of the hob to be written into a database; extracting hob instantaneous wear data from a database according to a preset mode, and determining a data set; determining the minimum number of the abrasion loss according to the data set; determining the current hob abrasion loss from the data set according to the minimum abrasion loss identification number and the data continuous judging result; the data continuity judgment result is obtained by carrying out data continuity judgment on the data set. The invention provides a hob abrasion detection method, which can obtain the current hob abrasion after each ring of tunneling of a shield machine is completed by calculating the hob instantaneous abrasion loss in real time, can timely obtain the abrasion condition of a hob, and solves the problems of low engineering practicability, poor calculation accuracy and the like of the existing hob abrasion detection method, thereby realizing accurate calculation of the hob abrasion loss of the shield machine.
According to the technical scheme, the data acquisition, storage, use, processing and the like all meet the relevant regulations of national laws and regulations, and various types of data such as personal identity data, operation data, behavior data and the like related to individuals, clients, crowds and the like acquired by the method are authorized.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (15)
1. A hob abrasion detection method, comprising:
acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
determining the instantaneous wear of the hob according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
the instantaneous wear amount of the hob and the corresponding instantaneous time, the current ring number and the changing time of the hob are used as instantaneous wear amount data of the hob to be written into a database;
extracting hob instantaneous wear data from a database according to a preset mode, and determining a data set;
determining the minimum number of the abrasion loss according to the data set;
determining the current hob abrasion loss from the data set according to the minimum abrasion loss identification number and the data continuous judging result; the data continuity judging result is obtained by judging the data continuity of the data set.
2. The method of claim 1, wherein obtaining the real-time rotational speed of the hob and the real-time rotational speed of the cutterhead comprises:
acquiring the real-time rotating speed of the hob through a first rotating speed sensor arranged in the hob barrel;
and acquiring the real-time rotating speed of the cutterhead through a second rotating speed sensor arranged on the cutterhead.
3. The method of claim 1, wherein determining the instantaneous wear of the hob based on the real-time rotational speed of the hob and the real-time rotational speed of the cutterhead comprises:
and determining the instantaneous wear of the hob by combining the theoretical radius of the hob with the radius of the tool path according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead.
4. A method according to claim 1 or 3, characterized in that the instantaneous wear of the hob is determined in such a way that:
W＝r×(1-100/S)
S＝(V 1 ×100)/[(V 2 ×R)/r]
wherein W is the instantaneous abrasion loss of the hob; v (V) 1 The real-time rotating speed of the hob is set; v (V) 2 The real-time rotating speed of the cutterhead is set; r is the theoretical radius of the hob; r is the radius of the tool path; s is the rotation speed ratio.
5. The method of claim 1, wherein extracting hob instantaneous wear data from the database in a predetermined manner, determining the data set, comprises:
when the ring number in the PLC changes, extracting instantaneous wear data of the hob in the previous ring from a database, and judging whether the hob replacement occurs in the previous ring or not;
and if the cutter changing occurs in the last ring, taking the instantaneous wear amount data of the hob from the moment of cutter changing to the finishing stop of the tunneling of the last ring in the last ring as a data set, and enabling the value of the wear amount of the cutter before the change of the ring number to be equal to zero.
6. The method as recited in claim 5, further comprising: and if the tool changing does not occur in the last ring, taking the instantaneous wear amount data of the hob of the whole ring in the last ring as a data set, and recording the wear amount of the tool before the ring number is changed.
7. The method of claim 1, wherein determining the minimum number of identified wear values based on the data set comprises:
removing the abnormal value in the data set through an abnormal value removing algorithm;
and determining the minimum number of the determined abrasion loss according to the number of the data of the instantaneous abrasion loss of the hob in the removed data set.
8. The method of claim 7, wherein outliers in the dataset are culled by an outlier culling algorithm comprising:
setting a cutter abrasion loss threshold range, and deleting the instantaneous cutter abrasion loss data which do not fall in the cutter abrasion loss threshold range in the data set;
and judging the abnormal value of the current data set through a box graph algorithm and/or a clustering algorithm, and eliminating the abnormal value from the current data set.
9. The method according to claim 1 or 7, wherein the minimum number of identified wear values is determined as follows:
a＝A×p
wherein a is the minimum number of abrasion loss; a is the number of the instantaneous abrasion loss data of the hob; p is the minimum percent of wear.
10. The method of claim 5 or 6, wherein determining the current amount of hob wear from the data set based on the minimum number of identified amounts of wear comprises:
rounding the hob instantaneous wear amount data of the data set according to a preset size, calculating the same number of the rounded hob instantaneous wear amount data in the data set, and arranging the rounded hob instantaneous wear amount data in order from small to large;
judging whether the number of data of the maximum value of the instantaneous wear amount data of the hob in the data set is larger than the minimum identification number of the wear amount;
if the number of the data of the maximum value of the instantaneous wear amount data of the hob in the data set is not more than the minimum rated number of the wear amount, deleting the instantaneous wear amount data of the hob from the data set, selecting the instantaneous wear amount data of the hob from the data set again, and comparing and judging the instantaneous wear amount data of the hob with the minimum rated number of the wear amount until the number of the data of the maximum value of the instantaneous wear amount data of the hob in the data set is more than the minimum rated number of the wear amount;
judging whether the maximum value of the instantaneous wear amount data of the hob in the data set and other instantaneous wear amount data of the hob except the maximum value meet the data continuity or not based on the fact that the number of the data of the maximum value of the instantaneous wear amount data of the hob in the data set is larger than the minimum identification number of the wear amount;
if the data continuity is judged not to be met, deleting the maximum value of the hob instantaneous wear amount data from the data set, selecting hob instantaneous wear amount data from the data set again, comparing and judging the minimum identification number of the wear amount data until the maximum value of the hob instantaneous wear amount data in the data set and other hob instantaneous wear amount data except the maximum value meet the data continuity, and outputting the maximum value of the hob instantaneous wear amount data in the current data set;
judging the maximum value of the instantaneous wear amount data of the hob in the current data set and the wear amount of the cutter before the change of the ring number;
if the maximum value of the instantaneous wear amount data of the hob in the current data set is larger than the wear amount of the cutter before the ring number is changed, taking the instantaneous wear amount data of the hob in the current data set as the current wear amount of the hob;
and if the maximum value of the instantaneous cutter abrasion loss data of the cutter in the current data set is smaller than or equal to the cutter abrasion loss before the change of the ring number, taking the cutter abrasion loss before the change of the ring number as the current cutter abrasion loss.
11. The method of claim 10, wherein determining whether data continuity is satisfied is performed in the following manner;
judging whether data with a first preset size and a second preset size smaller than the maximum value of the instantaneous wear amount data of the hob exist in the data set, and judging that the data continuity is met if the data with the first preset size and the data with the second preset size exist;
if either the first preset size or the second preset size does not exist, the data continuity is judged not to be met.
12. A hob abrasion detection device, comprising:
the rotating speed acquisition module is used for acquiring the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
the hob instantaneous wear amount determining module is used for determining the hob instantaneous wear amount according to the real-time rotating speed of the hob and the real-time rotating speed of the cutterhead;
the hob instantaneous wear amount data writing module is used for writing the hob instantaneous wear amount, the corresponding instantaneous moment, the current ring number and the hob changing moment of the hob into a database as one hob instantaneous wear amount data;
the data set determining module is used for extracting the instantaneous wear amount data of the hob from the database according to a preset mode and determining a data set;
the minimum abrasion loss identification number determining module is used for determining the minimum abrasion loss identification number according to the data set;
the current hob abrasion loss determining module is used for determining the current hob abrasion loss from the data set according to the minimum abrasion loss identification number and the data continuous judging result; the data continuity judging result is obtained by judging the data continuity of the data set.
13. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 11 when executing the computer program.
14. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the method of any of claims 1 to 11.
15. A computer program product, characterized in that the computer program product comprises a computer program which, when executed by a processor, implements the method of any of claims 1 to 11.
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| CN116907398A (en) * | 2023-09-15 | 2023-10-20 | 湖南浩拓机电科技有限公司 | Hob abrasion loss detection method and intelligent hob |
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| CN116907398A (en) * | 2023-09-15 | 2023-10-20 | 湖南浩拓机电科技有限公司 | Hob abrasion loss detection method and intelligent hob |
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