CN109665249B - Database management system and method based on PLC control - Google Patents
Database management system and method based on PLC control Download PDFInfo
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- CN109665249B CN109665249B CN201910036240.XA CN201910036240A CN109665249B CN 109665249 B CN109665249 B CN 109665249B CN 201910036240 A CN201910036240 A CN 201910036240A CN 109665249 B CN109665249 B CN 109665249B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000006854 communication Effects 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000007175 bidirectional communication Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims 1
- 238000007726 management method Methods 0.000 description 58
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
- B65G1/02—Storage devices
- B65G1/04—Storage devices mechanical
- B65G1/0485—Check-in, check-out devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
- B65G1/02—Storage devices
- B65G1/04—Storage devices mechanical
- B65G1/137—Storage devices mechanical with arrangements or automatic control means for selecting which articles are to be removed
- B65G1/1373—Storage devices mechanical with arrangements or automatic control means for selecting which articles are to be removed for fulfilling orders in warehouses
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Warehouses Or Storage Devices (AREA)
Abstract
The invention discloses a material warehouse management system and method based on PLC control, wherein the material warehouse management system comprises a material warehouse, a driving unit, a stacker, a PLC control unit and a management unit, wherein the PLC control unit is respectively connected with the driving unit and the management unit, the PLC control unit drives the stacker to convey materials to the material warehouse through controlling the driving unit, the PLC control unit stores the materials of the material warehouse and transmits operation data of the stacker to the management unit in real time, and the management unit gives an instruction to the PLC control unit through analyzing the data so as to better control the operation of the stacker.
Description
Technical Field
The invention relates to the field of logistics storage, in particular to a material warehouse management system and method based on PLC control.
Background
The stacker is used as core logistics equipment of an automatic stereoscopic warehouse and is also the most important equipment in a logistics warehouse system. In the working process of the stacker, materials are sent out of the stacker for warehouse entry, the state of the stacker is recorded, whether the stacker is provided with materials is monitored, and the stacker is generally sensed by a sensor arranged in the stacker. The sensor is installed at each warehouse location, so that the cost is increased, the installation and the debugging are complex, the stacker is controlled to go to the corresponding warehouse location through the PLC in the warehouse-in and warehouse-out process of materials, the control program quantity is large and complex, and the troubleshooting of the fault problem is difficult.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a material management system based on PLC control, which does not need to install a sensor at each warehouse position and is flexible and convenient to use, and a management method thereof.
In order to achieve the above purpose, the material warehouse management system based on PLC control comprises a material warehouse, a driving unit, a stacker, a PLC control unit and a management unit, wherein the PLC control unit is respectively connected with the driving unit and the management unit, the PLC control unit drives the stacker to convey materials to the material warehouse through controlling the driving unit, the PLC control unit stores the materials of the material warehouse and transmits operation data of the stacker to the management unit in real time, and the management unit gives an instruction to the PLC control unit through analyzing the data so as to better control the operation of the stacker.
Further, the material warehouse is built by aluminum profiles and comprises a plurality of warehouse positions.
Further, the total of the bins is 40 bins, and a 5×8 (column×row) division method is adopted.
Further, a photoelectric sensor is arranged on a grabbing mechanism of the stacker and used for detecting the storage condition of materials in a warehouse, the photoelectric sensor is in wireless connection with a PLC control unit, and the detected material information is transmitted to the PLC control unit for analysis and processing.
Further, the driving unit comprises a servo driving module and a pneumatic driving module, wherein the servo driving module and the pneumatic driving module are connected with the PLC control unit through a field bus, and the servo driving module and the pneumatic driving module are controlled by the PLC control unit so as to control the operation of the stacker and the material taking and discharging.
Further, the servo driving module comprises a servo driver and a servo motor, and the servo motor is arranged at the lower part of the stacker and used for driving the stacker to run on an X axis and a Z axis; the servo driver is connected with the servo motor and the PLC control unit respectively, and the servo driver and the PLC control unit are installed in a control cabinet on the side face of the material warehouse.
Further, the pneumatic driving module is arranged on a Z-axis tray of the stacker so as to control grabbing and unloading of materials.
Further, the PLC control unit is provided with a PROFINET communication interface, and performs communication control with the servo driving module and the pneumatic driving module through the PROFINET communication interface; the PLC control unit is arranged in a control cabinet on the side face of the stock warehouse, counts the stacker state and the stock warehouse state through the stacker warehouse-out and warehouse-in actions, feeds the counted data back to the management unit, and gives an instruction to the control unit according to the data.
Further, the management unit is in bidirectional communication with the PLC control unit through the dynamic link library, the states of the stacker and the materials are collected into the database of the management unit, and an instruction is given to the PLC control unit according to the requirements of on-site working conditions so as to control the operation of the stacker; through the management unit, the material inventory information can be analyzed in real time, the work of the stacker is reasonably distributed, and the work efficiency is effectively improved.
The management method of the stock base management system based on PLC control comprises the following steps:
(1) And (5) warehousing: when the stacker is in an initial state, the materials are defaulted to be empty, the management unit performs warehousing according to the types and the quantity of products ordered by the MES system, the stacker grabs the products for warehousing, after the products are placed in corresponding library positions, the PLC control unit sends a warehousing completion signal to the management unit, the management unit stores state data of the library positions into a database of the management unit, and the PLC control unit can read the state of the library stored in the database in real time;
(2) And (5) delivering out of a warehouse: after the warehouse-in is completed, the stacker performs a warehouse-out task according to the next product, after the stacker takes out the product from the warehouse, the PLC control unit sends a warehouse-out completion signal to the management unit, and the management unit stores the state data of the warehouse position into the database thereof to update the state of the warehouse;
(3) Disc library: when the stacker is idle for too long, the quantity of products in the stock warehouse is unknown, the management unit issues a warehouse inventory command, the PLC control unit controls the stacker to inventory materials, the stacker sequentially patrols and examines each warehouse site, and the photoelectric sensor transmits the detected warehouse site storage state to the management unit through the PLC control unit and updates the warehouse inventory command to the management unit.
The invention has the following beneficial effects:
(1) the invention adopts advanced bus control, and is convenient and quick to install, debug, repair and maintain;
(2) according to the invention, the states of the stacker and the material warehouse are collected into the management unit, the management unit reasonably arranges and analyzes the work and the data of the stacker and the material warehouse, and the workload of the PLC control unit is reduced to a certain extent;
(3) the management unit records the state of the collecting warehouse in the database, and controls and manages the warehouse in and out of the warehouse through the type of the product, the warehouse in and out time and the random selection condition, thereby realizing sequential, random and manual warehouse in and out operation control;
(4) the management unit adopted by the invention has the functions of data acquisition and monitoring, and is more flexible and higher in cost performance than the existing SCADA system.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a flow chart of the warehouse entry of the present invention;
FIG. 3 is a flowchart of the present invention;
fig. 4 is a flowchart of the disc library of the present invention.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature's illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "lower" may encompass both an upper and lower orientation. The device may be otherwise positioned (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to 4, the material warehouse management system based on the PLC control of the present invention includes a material warehouse 1, a driving unit, a stacker 5, a PLC control unit and a management unit, wherein the PLC control unit is respectively connected with the driving unit and the management unit, the PLC control unit drives the stacker 5 to convey materials to the material warehouse through controlling the driving unit, the PLC control unit transmits data such as material storage of the material warehouse and operation of the stacker to the management unit in real time, and the management unit gives instructions to the PLC control unit through analyzing the data so as to better control the operation of the stacker.
The material warehouse 1 is arranged at the outer side of the stacker 5 and is constructed by aluminum profiles, and comprises a plurality of warehouse positions 2 so as to store and manage different products, increase or reduce the types of the products, and can be distributed and controlled by a management unit. In this embodiment, the total number of the bins is 40, and a 5×8 (column×row) division method is adopted, so that in practical application, a suitable number of bins can be divided according to factors such as the size of the bins and the type of the stored products.
The grabbing mechanism of the stacker 5 is provided with a photoelectric sensor for detecting the storage condition of materials in the warehouse, the photoelectric sensor is in wireless connection with the PLC control unit, and the detected material information is transmitted to the PLC control unit for analysis and processing.
The driving unit comprises a servo driving module 3 and a pneumatic driving module 4, wherein the servo driving module 3 and the pneumatic driving module 4 are connected with the PLC control unit through a field bus, the servo driving module 3 and the pneumatic driving module 4 are controlled by the PLC control unit to control the operation of the stacker and the material taking and discharging, the servo driving module 3 comprises a servo driver and a servo motor, the servo motor is arranged at the lower part of the stacker 5 and is used for driving the stacker 5 to operate on an X axis and a Z axis, the servo driver is respectively connected with the servo motor and the PLC control unit, and the servo driver and the PLC control unit are arranged in a control cabinet at the side surface of the material warehouse; the pneumatic driving module is arranged on a Z-axis tray of the stacker so as to control grabbing and unloading of materials. In addition, the servo driving module is provided with a PROFINET communication interface which is used for being connected with the PLC control unit, and the PROFINET communication interface has the advantages of high communication speed and stability, so that the installation, the debugging and the maintenance are more convenient and quicker; the servo driving unit adopts Siemens V90 series servo, starts an EPOS function of the servo, and the PLC control unit can directly call the FB284 functional block to control the servo, so that the program quantity can be reduced; the pneumatic driving module is driven by distributed IO provided with a PROFINET communication interface, and the PROFINET communication interface is used for being connected with the PLC control unit.
The PLC control unit comprises an S7-1200PLC with a PROFINET communication interface, and is in communication control with the servo driving module and the pneumatic driving module through the PROFINET communication interface. The PLC control unit is arranged in a control cabinet on the side face of the stock warehouse, the PLC control unit counts the stacker state and the stock warehouse state through the actions of leaving the stacker, entering the warehouse and the like, and feeds the counted data back to the management unit, and the management unit gives instructions to the control unit according to the data, wherein the instructions comprise product selection, warehouse position selection, priority and the like.
The management unit is in bidirectional communication with the PLC control unit through the dynamic link library, the states of the stacker and the materials are collected into the database of the management unit, and instructions are given to the PLC control unit according to the requirements of on-site working conditions so as to control the operation of the stacker. Through the management unit, the material inventory information can be analyzed in real time, the work of the stacker is reasonably distributed, and the work efficiency is effectively improved. The management unit is directly connected with the PLC control unit, analyzes the stock state and gives a command to the PLC control unit.
According to the stock base management system based on PLC control, the management unit collects data sent by the PLC control unit, and then gives an instruction to the PLC control unit to control the stacker to operate efficiently.
The invention also discloses a stock management method based on PLC control, which comprises the following steps:
(1) And (5) warehousing: when the stacker is in an initial state, the materials are defaulted to be empty, the management unit performs warehousing according to the types and the quantity of products ordered by the MES (manufacturing execution system), the stacker grabs the products for warehousing, after the products are placed in corresponding library positions, the PLC control unit sends a warehousing completion signal to the management unit, the management unit stores state data of the library positions into a database of the management unit, and the PLC control unit can read the state of the library stored in the database in real time;
(2) And (5) delivering out of a warehouse: after the warehouse-in is completed, the stacker performs a warehouse-out task according to the next product, after the stacker takes out the product from the warehouse, the PLC control unit sends a warehouse-out completion signal to the management unit, and the management unit stores the state data of the warehouse position into the database thereof to update the state of the warehouse;
(3) Disc library: when the stacker is idle for too long, the quantity of products in the stock warehouse is unknown, the management unit issues a warehouse inventory command, the PLC control unit controls the stacker to inventory materials, the stacker sequentially patrols and examines each warehouse site, and the photoelectric sensor transmits the detected warehouse site storage state to the management unit through the PLC control unit and updates the warehouse inventory command to the management unit.
During the warehouse-in and warehouse-out process of the stacker, the warehouse-in position is selected and given by the management unit, and can be selected according to various modes:
(1) sequentially entering and exiting: selecting a target library bit according to the sequence of the library bit numbers;
(2) and (5) randomly entering and exiting: the management unit randomly selects a target library position;
(3) warehouse-in and warehouse-out according to the running time: if the order requires time urgently, the operation can be performed according to the running time of the stacker to the target storage position, and the most rapid target storage position is selected;
(4) put in and put out according to other requirements: the selection of the designated target bin may be made according to a number of particular requirements.
The invention has the following beneficial effects:
(1) the invention adopts advanced bus control, and is convenient and quick to install, debug, repair and maintain;
(2) according to the invention, the states of the stacker and the material warehouse are collected into the management unit, the management unit reasonably arranges and analyzes the work and the data of the stacker and the material warehouse, and the workload of the PLC control unit is reduced to a certain extent;
(3) the management unit records the state of the collecting warehouse in the database, and controls and manages the warehouse in and out of the warehouse through the type of the product, the warehouse in and out time and the random selection condition, thereby realizing sequential, random and manual warehouse in and out operation control;
(4) the management unit adopted by the invention has the functions of data acquisition and monitoring, and is more flexible and higher in cost performance than the existing SCADA system.
Claims (8)
1. The material warehouse management system based on the PLC control is characterized by comprising a material warehouse, a driving unit, a stacker, a PLC control unit and a management unit, wherein the PLC control unit is respectively connected with the driving unit and the management unit, the PLC control unit drives the stacker to convey materials to the material warehouse through controlling the driving unit, the PLC control unit stores the materials of the material warehouse and transmits operation data of the stacker to the management unit in real time, and the management unit gives an instruction to the PLC control unit through analyzing the data to control the operation of the stacker; the state of the stacker and the material warehouse is collected in a management unit, the management unit reasonably arranges the stacker and the material warehouse and analyzes data, so that the workload of the PLC control unit is reduced; the state of the collection warehouse is recorded in a database, and the control and management of the warehouse in and out are carried out through the type of the product, the warehouse in and out time and the random selection condition, so that the control of the sequential, random and manual warehouse in and out operation is realized;
in the warehouse-in and warehouse-out process of the stacker, the warehouse-in position is set through the management unit, and the stacker is selected according to the following modes:
(1) sequentially entering and exiting: selecting a target library bit according to the sequence of the library bit numbers;
(2) and (5) randomly entering and exiting: the management unit randomly selects a target library position;
(3) warehouse-in and warehouse-out according to the running time: if the order requires time urgently, selecting the most rapid target warehouse location according to the running time of the stacker to the target warehouse location;
(4) put in and put out according to other requirements: selecting and designating target library positions according to some special requirements;
the PLC control unit is provided with a PROFINET communication interface and is in communication control with the servo driving module and the pneumatic driving module through the PROFINET communication interface; the PLC control unit is arranged in a control cabinet on the side face of the stock warehouse, counts the stacker state and the stock warehouse state through the stacker warehouse-out and warehouse-in actions, feeds the counted data back to the management unit, and gives an instruction to the control unit according to the data;
the management unit is in bidirectional communication with the PLC control unit through the dynamic link library, the states of the stacker and the materials are collected into the database of the management unit, and an instruction is given to the PLC control unit according to the requirement of the on-site working condition so as to control the operation of the stacker; through the management unit, the material inventory information is analyzed in real time, the work of the stacker is reasonably distributed, and the work efficiency is effectively improved.
2. The stock house management system based on PLC control according to claim 1, wherein the stock house is built by aluminum profiles and comprises a plurality of stock sites.
3. The stock base management system based on the PLC control according to claim 2, wherein the total number of the stock bases is 40, and a 5×8 partition mode is adopted.
4. The stock warehouse management system based on the PLC control according to claim 1, wherein the grabbing mechanism of the stacker is provided with a photoelectric sensor for detecting the storage condition of materials in the stock position, the photoelectric sensor is in wireless connection with the PLC control unit, and the detected material information is transmitted to the PLC control unit for analysis and processing.
5. The stock warehouse management system based on the PLC control according to claim 1, wherein the driving unit comprises a servo driving module and a pneumatic driving module, the servo driving module and the pneumatic driving module are connected with the PLC control unit through a field bus, and the servo driving module and the pneumatic driving module are controlled by the PLC control unit to control the operation of the stacker and the material taking and unloading.
6. The stock library management system based on the PLC control according to claim 5, wherein the servo driving module comprises a servo driver and a servo motor, and the servo motor is arranged at the lower part of the stacker and used for driving the stacker to operate on an X axis and a Z axis; the servo driver is connected with the servo motor and the PLC control unit respectively, and the servo driver and the PLC control unit are installed in a control cabinet on the side face of the material warehouse.
7. The PLC control based material warehouse management system of claim 5, wherein the pneumatic drive module is mounted on a stacker Z-axis pallet to control the gripping and unloading of material.
8. A method of library management based on PLC control for implementing a library management system based on PLC control according to any one of claims 1-7, said method steps being as follows:
(1) And (5) warehousing: when the stacker is in an initial state, the materials are defaulted to be empty, the management unit performs warehousing according to the types and the quantity of products ordered by the MES system, the stacker grabs the products for warehousing, after the products are placed in corresponding library positions, the PLC control unit sends a warehousing completion signal to the management unit, the management unit stores state data of the library positions into a database of the management unit, and the PLC control unit can read the state of the library stored in the database in real time;
(2) And (5) delivering out of a warehouse: after the warehouse-in is completed, the stacker performs a warehouse-out task according to the next product, after the stacker takes out the product from the warehouse, the PLC control unit sends a warehouse-out completion signal to the management unit, and the management unit stores the state data of the warehouse position into the database thereof to update the state of the warehouse;
(3) Disc library: when the stacker is idle for too long, the quantity of products in the stock warehouse is unknown, the management unit issues a warehouse inventory command, the PLC control unit controls the stacker to inventory materials, the stacker sequentially patrols and examines each warehouse site, and the photoelectric sensor transmits the detected warehouse site storage state to the management unit through the PLC control unit and updates the warehouse inventory command to the management unit.
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| CN112173530A (en) * | 2019-07-01 | 2021-01-05 | 江苏卡邦电气科技股份有限公司 | Automatic material taking system and method thereof |
| CN110436105B (en) * | 2019-08-23 | 2021-06-01 | 郑州航空工业管理学院 | Intelligence commodity circulation storage warehouse |
| CN113788263B (en) * | 2021-10-14 | 2023-05-02 | 北京京东乾石科技有限公司 | Method and system for inspecting stored objects in three-dimensional warehouse |
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