CN115297184A - Data acquisition system for digital twins - Google Patents
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- CN115297184A CN115297184A CN202211207187.3A CN202211207187A CN115297184A CN 115297184 A CN115297184 A CN 115297184A CN 202211207187 A CN202211207187 A CN 202211207187A CN 115297184 A CN115297184 A CN 115297184A
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- H—ELECTRICITY
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- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/04—Protocols for data compression, e.g. ROHC
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- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
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Abstract
The invention discloses a data acquisition system for digital twins, which comprises a data acquisition module, wherein the data acquisition module comprises a state data acquisition unit for acquiring state data of production machinery and an environment data acquisition unit for acquiring environment data of a production workshop; the environment data acquisition unit comprises a partition subunit and an acquisition subunit; the partition subunit is configured to divide the partition subunit into a plurality of sub-regions in a user-defined manner: the acquisition subunit is configured to acquire environment data in the sub-region, and compress the environment data in the same sub-region to obtain compressed environment data. The invention respectively acquires the state data and the environment data by arranging different units, and adopts the steps of firstly acquiring the subareas, then acquiring the environment data in the subareas, then carrying out effective compression processing on the environment data based on the division result of the subareas, and finally transmitting the environment data to the data transmission module. Thereby effectively improving the transmission efficiency of data.
Description
Technical Field
The present invention relates to the field of data acquisition, and in particular to a data acquisition system for digital twinning.
Background
The digital twin is a simulation process integrating multidisciplinary, multi-physical quantity, multi-scale and multi-probability by fully utilizing data such as a physical model, sensor updating, operation history and the like, and mapping is completed in a virtual space, so that the full life cycle process of corresponding entity equipment is reflected.
In the process of production operation management, the traditional manufacturing industry generally stays in a mode of directly displaying data after the data in the production process is obtained. Such a data display manner is not intuitive enough, and is not beneficial for managers to intuitively know the real-time states of various devices and production environments in a workshop in the production process.
With the advent of digital twinning technology, the introduction of digital twinning technology has also begun to manage the operation of production processes by obtaining corresponding data in the production process and mapping the data into virtual space for production management.
The existing data acquisition mode for the digital twin generally adopts the steps of clustering firstly and then acquiring data through the cooperation of a cluster head node and a member node. However, the existing clustering mode is not combined with the actual situation of the acquisition environment, so that after data is acquired, effective data compression cannot be performed, and the transmission efficiency of the data is affected.
Disclosure of Invention
The invention aims to disclose a data acquisition system for a digital twin, which solves the problems that in the existing production operation management process, data is directly displayed, and managers are not facilitated to intuitively know the real-time states of various devices and production environments in a workshop in the production process.
In order to achieve the purpose, the invention adopts the following technical scheme:
a data acquisition system for digital twins comprises a data acquisition module, wherein the data acquisition module comprises a state data acquisition unit and an environment data acquisition unit;
the state data acquisition unit is used for acquiring state data of the production machine;
the environment data acquisition unit is used for acquiring environment data of a production workshop;
the environment data acquisition unit comprises a partition subunit and an acquisition subunit;
the partition subunit is used for dividing the partition subunit into a plurality of sub-areas in the following way:
acquiring historical environmental data of a production workshop, and storing the historical environmental data of the production workshop into a set S;
1 st sub-region acquisition:
s11, obtaining the historical environment data lgtel with the largest value in the set S, deleting the lgtel from the set S by taking the lgtel as reference data, and storing the lgtel in the set U1;
s12, obtaining the historical environment data nrele closest to the reference data from the set S;
s13, judging whether nrele and reference data accord with a set fusion rule, if yes, storing nrele into a set U1 and deleting nrele from a set S, and if not, finishing the acquisition process of the sub-region;
s14, taking the historical environment data nrele as new reference data, and entering S12;
and (4) acquiring a k-th sub-area:
sk1, obtaining the historical environment data with the maximum value in the set S
Will be
As reference data, will
Deleted from the set S, will
Storing the data into a set Uk;
sk2, obtaining the distance from the set SRecent historical environmental data of reference data
；
Sk3, judgment
Whether the reference data accords with the set fusion rule or not, if so, the reference data is subjected to the fusion rule
Store into the set Uk and will
Deleting the sub-region from the set S, if not, ending the sub-region acquisition process;
sk4, judging whether the set S is an empty set, if so, acquiring historical environment data
Entering Sk2 as new reference data, and if not, ending the sub-area division of the production workshop;
the acquisition subunit is configured to acquire the environment data in the sub-region, and compress the environment data of the same sub-region to acquire the compressed environment data.
Preferably, the acquisition subunit comprises a wireless sensor node and a base station;
the wireless sensor nodes are arranged in each subarea and used for acquiring environmental data in the subareas and sending the environmental data to the base station;
the base station is used for receiving the environment data from each wireless sensor node, compressing the environment data of the same sub-area and obtaining the compressed environment data.
Preferably, the data acquisition system for digital twinning further comprises a data transmission module,
the base station is also used for sending the compressed environment data to a data transmission module.
Preferably, the data transmission module comprises a 5G network or a fiber optic network.
Preferably, the data acquisition system for digital twinning further comprises a digital twinning management module;
and the digital twin management module is used for carrying out operation management on the production workshop by using a digital twin technology based on the state data and the compressed environment data sent by the data transmission module.
Preferably, the digital twin management module comprises a scene restoration unit, a data management unit and a three-dimensional display unit;
the scene restoration unit is used for modeling the production machine and the production workshop to obtain a three-dimensional model of the production machine in the production workshop and a three-dimensional model of the production workshop;
the data management unit is used for carrying out data processing on the state data and the environment data and acquiring the processed data;
the three-dimensional display unit is used for controlling the three-dimensional model of the production machine according to the processed data and changing the state of the three-dimensional model.
Preferably, the state data of the production machine comprises one or more of coordinates, rotation speed, steering angle, voltage, and current.
Preferably, the environmental data of the production plant includes temperature, humidity and suspended matter concentration.
Preferably, the data acquisition system for digital twinning further comprises an early warning module;
the early warning module comprises an early warning unit and a terminal unit;
the early warning unit is used for judging whether an alarm event exists according to the processed data, and if so, sending the alarm event to the terminal unit;
and the terminal unit is used for receiving and displaying the alarm event sent by the early warning unit.
In the process of acquiring the data for carrying out digital twinning on the production workshop, different units are arranged to respectively acquire the state data and the environment data, and in the process of acquiring the environment data, a subregion is acquired firstly, then the environment data in the subregion is acquired, then the environment data is effectively compressed based on the partitioning result of the subregion, and finally the environment data is transmitted to the data transmission module. Thereby effectively improving the transmission efficiency of data.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a diagram of one embodiment of a data acquisition system for digital twinning in accordance with the present invention.
FIG. 2 is a diagram of an embodiment of obtaining sub-regions according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In one embodiment, as shown in fig. 1, the present invention provides a data acquisition system for digital twins, comprising a data acquisition module, the data acquisition module comprising a status data acquisition unit and an environmental data acquisition unit;
the state data acquisition unit is used for acquiring state data of the production machinery;
the environment data acquisition unit is used for acquiring environment data of a production workshop;
the environment data acquisition unit comprises a partition subunit and an acquisition subunit;
as shown in fig. 2, the partition subunit is configured to be divided into a plurality of sub-areas in the following manner:
acquiring historical environmental data of a production workshop, and storing the historical environmental data of the production workshop into a set S;
acquiring a 1 st sub-region:
s11, obtaining the historical environment data lgtel with the largest value in the set S, deleting the lgtel from the set S by taking the lgtel as reference data, and storing the lgtel in the set U1;
s12, obtaining the historical environmental data nrele closest to the reference data from the set S;
s13, judging whether nrele and reference data accord with a set fusion rule, if yes, storing nrele into a set U1 and deleting nrele from a set S, and if not, finishing the acquisition process of the sub-region;
s14, taking the historical environment data nrele as new reference data, and entering S12;
obtaining a k-th sub-area:
sk1, obtaining the historical environmental data with the maximum value in the set S
Will be
As reference data, will
Deleted from the set S, will
Storing the data into a set Uk;
sk2, obtaining the historical environment data nearest to the reference data from the set S
；
Sk3, judgment
Whether the reference data accords with the set fusion rule or not, if so, the reference data is subjected to the fusion rule
Is stored in the set Uk and will
Deleted from the set S ifIf not, the process of obtaining the sub-area is finished;
sk4, judging whether the set S is an empty set, if so, acquiring historical environment data
Entering Sk2 as new reference data, and if not, ending the sub-area division of the production workshop;
the acquisition subunit is configured to acquire the environment data in the sub-region, and compress the environment data of the same sub-region to acquire the compressed environment data.
When the production workshop is divided into the plurality of sub-areas, the production workshop is not directly divided into the plurality of sub-areas with the same size, and the workshop is possibly irregular, so that the final division result is obtained by adopting a way of dividing the workshop into the sub-areas one by one. Therefore, places with similar values of historical environment data and similar collection distances can be divided into the same sub-area, and after the wireless sensor nodes in the same sub-area are subsequently clustered, because the numerical similarity of the environment data is large, the base station can express the acquired environment data of the member nodes in the same cluster by using smaller byte length when forwarding the data, so that the efficiency of data compression is improved when the cluster head nodes forward the data, and the electric quantity of the cluster head nodes is saved.
In the process of acquiring the sub-region, the reference data is constantly changed, so that the sub-region can extend outwards. And when the historical environment data which is closest to the current time is judged, taking the historical environment data as new reference data, and repeating the previous dividing steps. In addition, the invention continuously deletes the divided environmental data from the set S in the dividing process, so that the dividing speed is faster and faster along with the decrease of the number of elements in the set S in the later period of the dividing, and the dividing speed is effectively improved.
Preferably, for the reference data and the data closest to the reference data, whether the reference data and the data meet the set fusion rule is judged in the following way:
calculating a fusion coefficient:
in the formula (I), the compound is shown in the specification,
the fusion coefficient is expressed as a function of the number of frames,
、
indicating the set fusion weight or weights, and,
represents a preset reference value of the distance,
which represents the reference data, is,
which represents the reference data of the distance to the object,
to represent
Acquisition position of (2) and
the distance between the acquisition positions of (a) and (b),
and
respectively represent
And
the value of (d);
if the fusion coefficient is smaller than the set comparison threshold value, the result indicates that
And
the set fusion rule is met; if the fusion coefficient is greater than or equal to the set comparison threshold value, the fusion coefficient indicates that the fusion coefficient is greater than or equal to the set comparison threshold value
And
and does not accord with the set fusion rule.
The fusion coefficient is mainly calculated from the aspects of numerical values and distances, the closer the numerical values are, the smaller the distances are, the smaller the fusion coefficient is, and the more similar the environments of the areas where the two data are located are, so that the areas with similar environments are effectively divided into the same sub-area.
Preferably, the acquisition subunit comprises a wireless sensor node and a base station;
the wireless sensor nodes are arranged in each subarea and used for acquiring environmental data in the subareas and sending the environmental data to the base station;
and the base station is used for receiving the environment data from each wireless sensor node, compressing the environment data of the same sub-area and obtaining the compressed environment data.
The wireless sensor nodes are arranged in the sub-area in a scattered mode, and the base station can be arranged in the middle of a production workshop.
Preferably, the wireless sensor nodes in the same subregion generate cluster head nodes and member nodes in a clustering manner;
the member nodes are used for acquiring the environmental data of the production workshop and sending the environmental data to the cluster head nodes;
the cluster head node is used for receiving the environment data from the member nodes and sending the environment data to the base station.
Preferably, for the environmental data obtained by the member nodes in the same cluster at the same time, the base station may select one environmental data as the reference data, and then, when representing the obtained data of other member nodes in the same cluster, only the numerical difference between the current data and the reference data needs to be written clearly, and at the same time, the numerical difference can also be represented in a difference manner, thereby implementing the compression processing of the data.
For example, if the base station data acquired by the member node with the number 1705 at the time t is 35 degrees Celsius, the base station data is stored in an array as [1705, t,35]
Then, if the base station data acquired by a member node with the number 1698 at the time t is 36 ℃, the compression is expressed in the form of [ -7,t, +1], so that the byte length in the array is shortened, and the compression purpose is achieved. The compressed data occupies less storage space, so that the data transmission efficiency is higher.
Preferably, the time interval between two adjacent clusters is calculated by the following formula:
where sttm represents the time interval between two clusters, sblk represents the set of wireless sensor nodes in a sub-area,
represents the remaining power of the wireless sensor node q in sblk, nsblk represents the number of wireless sensor nodes in the sub-area, stertf represents a set power variance comparison parameter,
representing the size of the environment data transmitted by the wireless sensor nodes in the sub-area for a set length of time,
indicating the set reference value of the amount of data transmission,
representing a reference time interval.
The time interval changes along with the variance of the electric quantity and the change of the transmitted data quantity, the larger the variance is, the larger the data quantity is, the smaller the time interval is, the power consumption between the wireless sensor nodes can be balanced quickly, and the average working time of the wireless sensor nodes can be prolonged.
Preferably, the data acquisition system for digital twinning further comprises a data transmission module,
and the base station is also used for sending the compressed environment data to the data transmission module.
Preferably, the status data acquisition unit is used for sending the status data of the production machine to the data transmission module.
Preferably, the data transmission module comprises a 5G network or a fiber optic network.
Preferably, the data acquisition system for digital twinning further comprises a digital twinning management module;
the data transmission module is also used for sending the state data and the compressed environment data to the digital twin management module;
and the digital twin management module is used for carrying out operation management on the production workshop by using a digital twin technology based on the state data and the compressed environment data sent by the data transmission module.
The state data and the environment data obtained in the production process are displayed by adopting a digital twin technology, so that managers can intuitively know the real-time states of various machines and the real-time states of the environment, and the accuracy of commands of production commands made by the managers is improved.
Preferably, the digital twin management module comprises a scene restoration unit, a data management unit and a three-dimensional display unit;
the scene restoration unit is used for modeling the production machine and the production workshop to obtain a three-dimensional model of the production machine in the production workshop and a three-dimensional model of the production workshop;
the data management unit is used for carrying out data processing on the state data and the environment data and acquiring the processed data;
the three-dimensional display unit is used for controlling the three-dimensional model of the production machine according to the processed data and changing the state of the three-dimensional model.
And (3) digitally and truly restoring the field process/environment, including modeling workshops, production lines and main equipment and manufactured products. And integrating a real-time rendering engine, and acquiring the workshop production operation state in real time in a 3D scene. And rapidly positioning various alarm information to a 3D scene, and timely acquiring the operation risk. The 3D + digital interactive presentation can realize image cognition and data accurate positioning, accelerate the thinking transition of managers and lay a foundation for subsequent function expansion.
And the two modes of flow modeling and fine modeling are combined, the production lines/equipment of each workshop of the factory are restored in a 3D mode, and the production process of each workshop is completely presented. Modeling in a flow way: restoring production lines of all workshops according to the production process flow, and completely reproducing the production process of each workshop of the factory by the virtual world; and (3) refining modeling: the key working sections/stations of each workshop finely restore the action process of the robot, so that the real restoration of welding of different products, spraying of different colors and assembly of different parts is realized.
The data processing comprises error repair, elimination of error data and the like. The acquired data can be integrated, cleaned, processed and stored, and a basis is provided for digital twin display of the data.
Preferably, the three-dimensional display unit is further configured to display the environmental data of the production shop in a three-dimensional model of the production shop.
In addition, the three-dimensional display unit can display a monitoring graph, a trend graph and the like in the model.
Preferably, the controlling the three-dimensional model of the production machine based on the processed data to change the state of the three-dimensional model includes:
and judging whether the state of the production machine in the production workshop changes or not according to the acquired coordinates, and if so, presenting the change in the corresponding three-dimensional model.
When the three-dimensional model is produced, different models can be generated for different states of the production machine, and when the states are changed, only the corresponding models need to be replaced.
Preferably, the state data of the production machine comprises one or more of coordinates, rotation speed, steering angle, voltage, and current.
The corresponding state data of different production mechanical locks are different, for example, for a mechanical arm, the corresponding state data are coordinates of each component of the mechanical arm, the rotating speed, the voltage, the current and the like of a motor.
Preferably, the environmental data of the production plant includes temperature, humidity and suspended matter concentration.
Preferably, the environmental data of the production plant may also include the concentration of various hazardous gases, such as hydrogen, carbon monoxide, etc.
Preferably, the data acquisition system for digital twinning further comprises an early warning module;
the early warning module comprises an early warning unit and a terminal unit;
the early warning unit is used for judging whether an alarm event exists according to the processed data, and if so, sending the alarm event to the terminal unit;
and the terminal unit is used for receiving and displaying the alarm event sent by the early warning unit.
For example, when the processed data is environmental data of a production workshop, whether an alarm event exists can be judged by judging whether the environmental data exceeds a set numerical range. The alarm event includes the event occurrence location, time, event type, etc.
After an alarm event is detected, the corresponding position in the three-dimensional model can be changed to prompt the occurrence of the alarm event. For example, by changing the color of the production machine.
The invention respectively acquires the state data and the environmental data by arranging different units in the process of acquiring the data for carrying out digital twinning on the production workshop,
in the process of acquiring the environment data, the sub-region is firstly acquired, then the environment data in the sub-region is acquired, then the environment data is effectively compressed based on the dividing result of the sub-region, and finally the environment data is transmitted to the data transmission module. Thereby effectively improving the transmission efficiency of data.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. A data acquisition system for digital twinning is characterized by comprising a data acquisition module, wherein the data acquisition module comprises a state data acquisition unit and an environment data acquisition unit;
the state data acquisition unit is used for acquiring state data of the production machinery;
the environment data acquisition unit is used for acquiring environment data of a production workshop;
the environment data acquisition unit comprises a partition subunit and an acquisition subunit;
the partition subunit is used for dividing the partition subunit into a plurality of sub-areas in the following way:
acquiring historical environmental data of a production workshop, and storing the historical environmental data of the production workshop into a set S;
acquiring a 1 st sub-region:
s11, obtaining historical environment data lgteel with the largest value in the set S, deleting the lgteel from the set S by taking the lgteel as reference data, and storing the lgteel into a set U1;
s12, obtaining the historical environment data nrele closest to the reference data from the set S;
s13, judging whether nrele and reference data accord with a set fusion rule, if so, storing nrele into a set U1 and deleting nrele from the set S, otherwise, ending the acquisition process of the sub-region;
s14, taking the historical environment data nrele as new reference data, and entering S12;
and (4) acquiring a k-th sub-area:
sk1, obtaining the historical environmental data with the maximum value in the set S
Will be
As reference data, will
Deleted from the set S, will
Storing the data into a set Uk;
sk2, obtaining the historical environment data nearest to the reference data from the set S
；
Sk3, judgment
Whether the reference data accords with the set fusion rule or not, if so, the reference data is subjected to fusion
Is stored in the set Uk and will
Deleting the sub-region from the set S, if not, ending the acquisition process of the sub-region;
sk4, judging whether the set S is an empty set, if so, acquiring historical environment data
Entering Sk2 as new reference data, and if not, ending the sub-area division of the production workshop;
the acquisition subunit is configured to acquire environment data in the sub-region, and compress the environment data in the same sub-region to obtain compressed environment data.
2. A data acquisition system for digital twinning as claimed in claim 1, wherein the acquisition subunit includes a wireless sensor node and a base station;
the wireless sensor nodes are arranged in each subarea and used for acquiring environmental data in the subareas and sending the environmental data to the base station;
and the base station is used for receiving the environment data from each wireless sensor node, compressing the environment data of the same sub-area and obtaining the compressed environment data.
3. The data acquisition system for digital twinning as claimed in claim 2, further comprising a data transmission module,
the base station is also used for sending the compressed environment data to a data transmission module.
4. A data acquisition system for digital twinning as claimed in claim 3, wherein said data transmission module comprises a 5G network or a fibre optic network.
5. A data acquisition system for digital twinning as claimed in claim 3, further comprising a digital twinning management module;
and the digital twin management module is used for carrying out operation management on the production workshop by using a digital twin technology based on the state data and the compressed environment data sent by the data transmission module.
6. The data acquisition system for digital twins as claimed in claim 5, wherein the digital twins management module comprises a scene restoration unit, a data management unit and a three-dimensional presentation unit;
the scene restoration unit is used for modeling the production machine and the production workshop to obtain a three-dimensional model of the production machine in the production workshop and a three-dimensional model of the production workshop;
the data management unit is used for carrying out data processing on the state data and the environment data and acquiring the processed data;
the three-dimensional display unit is used for controlling the three-dimensional model of the production machine according to the processed data and changing the state of the three-dimensional model.
7. The data acquisition system for digital twinning as claimed in claim 1, wherein the status data of the production machine includes one or more of coordinates, rotational speed, steering angle, voltage, current.
8. The data acquisition system for digital twinning as claimed in claim 1, wherein the environmental data of the production plant includes temperature, humidity and aerosol concentration.
9. The data acquisition system for digital twins as claimed in claim 6, further comprising an early warning module;
the early warning module comprises an early warning unit and a terminal unit;
the early warning unit is used for judging whether an alarm event exists according to the processed data, and if so, sending the alarm event to the terminal unit;
and the terminal unit is used for receiving and displaying the alarm event sent by the early warning unit.
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Denomination of invention: A Data Acquisition System for Digital Twins Effective date of registration: 20230525 Granted publication date: 20221213 Pledgee: Bank of China Limited by Share Ltd. Guangzhou Panyu branch Pledgor: Networks Technology Co.,Ltd. Registration number: Y2023980041774 |