Vehicle informatization production method and vehicle production informatization system

Abstract

The present application provides a vehicle information production method, comprising: generating a production number of a vehicle according to assembly information stored in a production server; setting a vehicle identification code and a radio frequency identification chip storing the production number on any vehicle; reading the radio frequency identification chip and the vehicle identification code to obtain the production number at the head of a conveying line and sending the production number to the production server for data verification; generating a vehicle sequence of the conveying line for a production number that passes the verification; performing vehicle assembly work on the conveying line according to the vehicle sequence; and updating the assembly information in the production server. The present application also provides a vehicle production information system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle manufacturing, in particular to an assembly shop production data information system based on radio frequency identification technology and editable logic control technology. BACKGROUND

[0002] The current automobile industry competition is increasingly fierce, and customers' expectations for automobile products are increasingly high. In order to adapt to the increasingly fierce market competition and seize the opportunity in the market competition, on the one hand, automobile manufacturing enterprises speed up the digital transformation to improve production flexibility and increase product competitiveness; on the other hand, automobile manufacturing enterprises focus on internal improvement and implement paperless lean production to reduce enterprise investment and operating costs. In the current manufacturing industry, the planning decision system, the production execution system and the field control system are independent of each other; for example, the production site uses a vehicle sheet and a quality card, which is printed by a printer connected to the production execution system and pasted on the vehicle body during production; not only wastes manpower and paper, but also cannot respond to changes in time.

[0003] In the current manufacturing industry, the planning decision system, the production execution system and the field control system are independent of each other; for example, the production site uses a vehicle sheet and a quality card, which is printed by a printer connected to the production execution system and pasted on the vehicle body during production; not only wastes manpower and paper, but also cannot respond to changes in time. The present application combines the production execution system and the field control system, obtains real-time production and position information of the vehicle in the production site through the editable logic controller and the information acquisition device, and communicates with the production execution system and the field terminal to make the display screen in the field obtain production data from the production execution system in real time and display, guide the assembly and production quality data storage. Not only saves cost, but also improves the flexibility of the conveying line and the timeliness of information transmission.

[0004] The Chinese national invention "An automobile seat assembly first station information reading and writing system based on RFID technology" (publication number: CN107220776A) is proposed to overcome the problem that in the actual assembly line production environment, high-frequency RFID tags are easily read and written in the complex electromagnetic environment of the workshop, which causes reading and writing failure and thus the entire production line and the timing production system cannot be matched in time. A method for reading and writing verification of automobile assembly line first station tool information is proposed, which improves the reading and writing mode of the information reading and writing system of the assembly product entering the first station, increases data verification after reading and writing of the tag, ensures writing of the tag data, avoids interruption or mismatch of timing production caused by empty writing of the tag, realizes normal operation of the timing production line, and ensures effective and reliable operation of the production. However, this system still does not fundamentally solve the technical problem of RFID tag reading and writing failure, especially when each station of the assembly line needs to provide assembly information to the production server, the tag reading and writing failure will affect the operation of the assembly line. SUMMARY

[0005] The present application provides a vehicle information production method, comprising: obtaining assembly information of a vehicle and saving the information to a production server, and assigning a production number to the vehicle; setting a vehicle identification code and a radio frequency identification chip storing the production number on any vehicle; reading the radio frequency identification chip and the vehicle identification code to obtain the production number at each station of a conveying line; performing vehicle assembly work, sending the production number and assembly status of the vehicle at the current station to the production server to update the corresponding assembly information.

[0006] Further, at each station of the conveying line, if the read data of the radio frequency identification chip is the same as the read data of the vehicle identification code, the read data is taken as the production number of the vehicle at the current station and sent to the production server, otherwise manual operation is requested to obtain the production number.

[0007] Further, at the first station of the conveying line, the read production number is sent to the production server, if the read production number is the same as the production number saved by the production server, data verification is passed, the vehicle sequence of the conveying line is generated according to the production number, otherwise manual operation is requested to obtain the production number.

[0008] Further, after the production server updates the assembly information, the updated assembly information is sent to the terminal at the current station of the vehicle.

[0009] Preferably, the terminal is arranged at each station, and the terminal at any station obtains assembly information according to the production number of the vehicle currently assembled at the station.

[0010] Preferably, the terminal is arranged on each catering vehicle, and when the catering vehicle moves to any station, the terminal obtains assembly information according to the production number of the vehicle currently assembled at the station.

[0011] Preferably, the conveying line has first stations and second stations, the terminal is arranged at each first station and each catering vehicle, the terminal at any first station obtains assembly information according to the production number of the vehicle currently assembled at the first station, and when the catering vehicle moves to any second station, the terminal obtains assembly information according to the production number of the vehicle currently assembled at the second station.

[0012] The application further provides a vehicle informatization production system, which adopts the vehicle informatization production method and assembles vehicles on a conveying line, and comprises a production server, a reading device, an information carrier and a terminal device.

[0013] Preferably, the first reading device and the second reading device are arranged on the terminal.

[0014] Preferably, the conveying line has a plurality of stations, and the stations supply assembly parts by means of racks or assembly trolleys. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 1 is a schematic diagram of a vehicle informatization production architecture according to the application.

[0016] Figure 2 Fig. 2 is a schematic diagram of a vehicle informatization production data flow according to the application.

[0017] Figure 3 Fig. 3 is a schematic diagram of one of vehicle informatization production scenes according to the application.

[0018] Figure 4 Fig. 4 is a schematic diagram of another of vehicle informatization production scenes according to the application.

[0019] Figure 5 Fig. 5 is a schematic diagram of a third of vehicle informatization production scenes according to the application.

[0020] Figure 6 Fig. 6 is a network topology diagram of a PLC and MES system interaction scheme according to the application.

[0021] Figure 7A 、 7B Fig. 7 is a schematic diagram of a vehicle sequence according to the application.

[0022] In the drawings, the reference signs are as follows:

[0023] 1: vehicle 11: vehicle identification code

[0024] 12: radio frequency identification chip 2: reading device

[0025] 21: high-frequency camera 22: radio frequency read-write device

[0026] 3: programmable logic controller 4: production execution controller

[0027] 5: cloud server 6: terminal

[0028] 7: conveying line DETAILED DESCRIPTION

[0029] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, and the described embodiments are only one embodiment of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the protection scope of the present application.

[0030] In the initial technical field, information technology (IT) and operation technology (OT) have little intersection, with the advent of the industrial internet era, through the Internet of Things, big data and cloud intelligence, IT and OT can finally communicate, sensors in the OT field acquire data, upload to the cloud center in the IT field to perform big data analysis, and various innovative applications have been derived. It can be said that the industrial internet era has opened up the fusion of IT and OT, and communication technology (CT) also plays a more important role in this process.

[0031] Under this premise, many industrial internet solutions with information-physical network fusion production system as the core will not deviate from the main axis of the fusion of IT, OT and CT in architecture design.

[0032] The main innovation of the present application is to combine information technology and execution technology in the production system; the main principle is to acquire production site data through radio frequency identification technology and high-frequency camera technology, and to communicate with the company production execution system through the programmable logic controller (PLC) in the production site, to match the production data to each terminal in the field with agile response speed, and to obtain big data as the basis for intelligent manufacturing.

[0033] The vehicle information production architecture of the present application is shown in Figure 1 The conveying line 7 carries the vehicle 1 to move, and the assembly information data is collected by the information collection device 2 (such as a high-frequency camera and a radio frequency read-write device), and is sent to the production execution controller (production server VBA) 4 in the form of an electric text through the programmable logic controller (PLC) 3, the production execution controller 4 runs the production execution control system and transmits to each terminal 6 through the network, and also receives the production instruction of the cloud server 5.

[0034] The feature of the present technology is to connect the vertical isolated systems in series to communicate the production data in real time, which has the advantages of low communication delay and system interface data sharing, breaking the bottleneck of the traditional production mode that the production information transmission is not timely and the information system is isolated from the execution system. However, the current communication mode from the execution controller to the terminal is through a wireless network, which has problems such as unstable signal, and will be further optimized in the future relying on the industrial 5G network platform.

[0035] As shown in Figure 2 The present application mainly reads the vehicle identification code 11 by high-frequency camera technology (high-frequency camera 21) and reads the radio frequency identification chip 12 by radio frequency identification technology (radio frequency read-write device 22) to obtain the production data of the vehicle 1 in the production site (conveying line 7), and communicates with the company production execution system (production execution controller 4) through the editable logic controller 3 in the production site to match the production data (assembly information) to each terminal 6 in the site (conveying line) with agile response speed, and upload all data to the cloud server 5 to obtain the basis for intelligent manufacturing through big data.

[0036] As shown in Figure 3 One of the application scenarios of the production site of the present application is that there is no catering vehicle accessory, and the production site uses shelves, top up or JES to supply parts. Specifically, it includes:

[0037] 1.1 Equipment installation scheme: the terminal is fixedly arranged at each work station, such as the position of the work station where the line-side shelf or line-side steel structure is located. The flat plate only displays unique vehicle information and updates the display interface according to the production number of the vehicle conveyed by the conveying line. The terminal is, for example, a desktop computer, a notebook computer, etc. In all embodiments of the present application, an industrial tablet computer is used, which is referred to as a tablet computer hereinafter.

[0038] 1.2 Vehicle sequence acquisition scheme: each work station of the conveying line is provided with an input source device for acquiring the production number: 1) the high-frequency camera acquires the production number information by scanning the vehicle body identification code, which can be a bar code, a two-dimensional code, or letters, numbers, symbols, etc. that can be identified as production number information; 2) the radio frequency read-write device acquires the production number information by reading the radio frequency identification chip;

[0039] 1.3 Vehicle sequence verification scheme: the PLC acquires the production numbers of the two input sources, compares them, and sends them to the VBA module in the form of a message. The VBA module compares the vehicle sequence received from the PLC with the vehicle sequence in the MES system. If the comparison is correct, the vehicle is released. If it is not correct, an alarm request is initiated to manually scan the vehicle sequence by the worker.

[0040] 1.4 Vehicle sequence transmission scheme: the MES system forms a vehicle sequence for the production number that has passed the VBA verification and transmits it to the subsequent work station in a stack manner.

[0041] 1.5 Terminal Activation Scheme: Each workstation is set with an offset. The PLC is activated by the vehicle body that newly enters the conveyor line. The PLC is triggered by the stack and displayed on the fixed tablet at each workstation.

[0042] like Figure 4 As shown, the second application scenario of this invention in the production site is the supply of parts for a catering cart, where parts are supplied to the production site via catering carts. Specifically, this includes:

[0043] 2.1 Equipment Installation Scheme: The flat panel is installed on the meal delivery carts on each production line and moves synchronously to the logistics area or conveyor line as the meal delivery carts move. The flat panel displays only a unique production number during a single part transport cycle, and the display interface is updated based on the checkpoint at the workstation it reaches.

[0044] 2.2 Vehicle Sequence Acquisition Scheme: Each workstation on the conveyor line is equipped with an input source device to acquire the production number: 1) A high-frequency camera acquires the production number information by scanning the vehicle identification code. The vehicle identification code can be a barcode, a QR code, or an encoding that can identify the production number information, such as letters, numbers, or symbols; 2) An RFID reader acquires the production number information by reading the RFID chip.

[0045] 2.3 Vehicle sequence verification scheme: The PLC obtains the production number from two input sources, and after comparison, sends it to the VBA module in the form of a message. The VBA module compares the vehicle sequence received from the PLC with the vehicle sequence in the MES system. If the verification is successful, the vehicle is released. If it fails, an alarm is triggered to request the processor to manually scan and input the vehicle sequence.

[0046] 2.4 Vehicle Sequence Transfer Scheme: The MES system generates a vehicle sequence for vehicles that have been verified by VBA. After the SC enters the conveyor line and locks onto the conveyor line, it immediately enters the first electronic tag activation point. VBA sends the stored vehicle sequence to the first activated terminal device according to the first-in-first-out principle.

[0047] 2.5 Terminal Activation Scheme: Each meal delivery vehicle is locked to the conveyor line to obtain operating power, and each terminal device moves with the meal delivery vehicle; electronic tags with checkpoint information of the workstation are fixed on the steel structure at the line side, and the terminal devices are connected to RFID readers; each time the vehicle moves to a new workstation, the reader will read and write the checkpoint information in the electronic tag of that workstation and trigger the terminal to update.

[0048] like Figure 5The third production site application scenario is shown: the mixed parts feeding mode of the conveying line, part of the stations use the parts feeding trolley to feed parts, and the production site supplies parts through the parts feeding trolley; part of the stations use the rack, top up or JES to feed parts. Specifically, it includes:

[0049] 3.1 Equipment installation scheme: the equipment in the parts feeding trolley area is installed on each parts feeding trolley and moves synchronously with the movement of the parts feeding trolley to the logistics area or the conveying line. The panel displays only one production number in one cycle and updates the display interface according to the checkpoint reached; the equipment in the non-parts feeding trolley area is installed on the fixed device of each station, such as the rack on the line side and the steel structure on the line side. The panel only displays a unique checkpoint and updates the display interface according to the production number of the vehicle conveyed by the conveying line.

[0050] 3.2 Vehicle sequence acquisition scheme: the first station of the conveying line is provided with two devices for acquiring the production number sequence: 1) a camera located at the head of the conveying line acquires the production number information by scanning the barcode on the vehicle body; and 2) a radio frequency read-write device located at the head of the conveying line acquires the production number information by reading and writing the electronic tag carried by the conveying device. The processing mode of the two information acquisition methods is:

[0051] 3.3 Vehicle sequence verification scheme: the PLC acquires the production numbers of the two input sources, compares them, and sends them to the VBA module in the form of a message. The VBA module compares the vehicle sequence received from the PLC with the vehicle sequence in the MES system. If the comparison is correct, the vehicle is released. If the comparison is not correct, an alarm request is initiated, and the worker manually scans the vehicle sequence;

[0052] 3.4 Vehicle sequence transmission scheme: the MES system in the parts feeding trolley area forms a vehicle sequence sequence for the vehicle sequence that has passed the VBA verification; the SC enters the first electronic tag activation point after entering the conveying line and being locked by the conveying line, and the VBA sends the stored vehicle sequence sequence to the terminal device that is activated first according to the first-in-first-out principle; the MES system in the non-parts feeding trolley area forms a vehicle sequence sequence for the vehicle sequence that has passed the VBA verification and transmits it to the subsequent stations in a stack manner;

[0053] 3.5 Terminal activation scheme: each parts feeding trolley in the parts feeding trolley area is locked with the conveying line to obtain running power, and each terminal device moves with the parts feeding trolley; the line side is provided with an electronic tag fixed on the steel structure and having checkpoint information of the station, and the terminal device is connected with a radio frequency read-write device; every time the terminal device moves to a new station, the read-write device reads and writes the checkpoint information in the electronic tag of the station and triggers the terminal to update; each station in the non-parts feeding trolley area is provided with an offset, the PLC is activated by the vehicle body entering the production line, and the fixed terminal is triggered to display by the stack;

[0054] Figure 6 The PLC interacts with the MES system scheme network topology: the PLC collects vehicle production number information through industrial-grade cameras and radio frequency technology equipment, and communicates with the VBA module in the MES, and the function of the VBA module is realized through the first station panel:

[0055] After the PLC and the MES system communicate and reach an agreement, the correct sequence is formed, and the terminal equipment on the station and the serving vehicle is triggered in different ways to display the correct information, wherein:

[0056] For the fixed scheme panel device: the checked vehicle sequence forms a sequence, which is transmitted to the subsequent station through the stack mode, and the terminal equipment fixed in different stations is set to different offset pointers to obtain the correct production sequence number; the terminal equipment of the fixed station does not change the station information, and the production sequence number is switched in order and at a certain beat, as shown in Figure 7A .

[0057] For the SC scheme panel device: the same sequence is used, and the stack mode is transmitted to the serving vehicle entering the station (such as the first station without stack); after the serving vehicle carrying the terminal equipment and the radio frequency receiver enters the first station, the receiver is triggered by the electronic tag of the first station, the corresponding vehicle sequence is obtained by the MES system display module running by the terminal equipment, and the correct production sequence information is displayed; as the serving vehicle moves to the next station, the station information of the terminal changes, and the production number remains unchanged in a serving vehicle cycle, as shown in Figure 7B .

[0058] The present application combines the production execution system with the field control system, obtains real-time production and position information of vehicles in the production field through an editable logic controller and information collection equipment, and communicates with the production execution system and the field terminal, so that the display screen in the field can obtain production data from the production execution system in real time and display, guide the assembly and production quality data storage. Not only saves the cost, but also improves the flexibility of the conveying line and the timeliness of information transmission.

[0059] The present application has the following advantages:

[0060] 1. The present application combines information technology and execution technology to help enterprises realize full-digital production mode of workshop-level production assembly information in the production system, saving paper;

[0061] 2. Through the deployment of the workshop-level system and the hardware laying of the station level, various data can be quickly collected, laying a solid foundation for the creation of enterprise big data platform;

[0062] 3. Real-time record and archive production quality information, through the retrieval mode to facilitate subsequent data query work;

[0063] 4. Avoid the loss of paper production card, or the missing caused by not uploading, resulting in the loss of vehicle production quality data;

[0064] 5. Real-time update of optional parts information, ensure low delay transmission of changes, ensure that the parts assembled by the processing person are highly consistent with the system;

[0065] The description and application of the present application are illustrative, and are not intended to limit the scope of the present application to the embodiments described above. Variations and modifications of the embodiments disclosed herein are possible and are contemplated by the inventor. Substitutions of elements from one embodiment to another are also contemplated as is changes in the arrangement of elements. It will be apparent to those skilled in the art that other implementations of the application can be developed using the concepts disclosed herein, and are therefore intended to fall within the scope of the application. Accordingly, while the present application is susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in order to illustrate the application's principles and applications. The embodiments disclosed herein are intended to be illustrative only and not limiting of the scope of the application. Numerous other embodiments can be devised and will be understood by those skilled in the art that can, in fact, be made without departing from the spirit and scope of the present application. Accordingly, the disclosure of specific implementations recited herein are intended to be illustrative, not restrictive, of the scope of the application. Thus, the scope of the present application should be determined by the appended claims and their legal equivalents rather than by the description contained herein.

Claims

1. A vehicle informatization production method characterized by, The method comprises: acquiring assembly information of a vehicle and saving the information to a production server, and assigning a production number to the vehicle; providing a vehicle identification code and a radio frequency identification chip on each vehicle, the vehicle identification code and the radio frequency identification chip storing the production number of the vehicle, and providing an electronic tag at each station, the electronic tag storing checkpoint information of the station; performing vehicle assembly, reading the vehicle identification code by using a first reading device, reading the radio frequency identification chip by using a second reading device, acquiring the production number, reading the electronic tag by using a radio frequency reader, and acquiring the checkpoint information; sending the production number and the assembly status of the vehicle at the current station to the production server to update the corresponding assembly information, and sending the updated assembly information to a terminal; the radio frequency reader is arranged on the terminal; when assembly parts are supplied by a trolley, the terminal is arranged on each trolley; when the trolley moves to any station, the terminal acquires the assembly information according to the production number of the vehicle currently assembled at the station and the checkpoint information of the station; or, when the conveying line has a first station and a second station, and the first station supplies assembly parts by a rack and the second station supplies assembly parts by a trolley, the terminal is arranged on each first station and each trolley; the terminal of any first station acquires the assembly information according to the production number of the vehicle currently assembled at the station and the checkpoint information of the station; when the trolley moves to any second station, the terminal acquires the assembly information according to the production number of the vehicle currently assembled at the station and the checkpoint information of the station.

2. The vehicle informatization production method according to claim 1, characterized in that, At each station of the conveying line, if the read data of the radio frequency identification chip is the same as the read data of the vehicle identification code, the read data is taken as the production number of the vehicle at the current station and is sent to the production server, otherwise, manual operation is requested to acquire the production number.

3. The vehicle informatization production method according to claim 2, characterized in that, At the first station of the conveying line, the read production number is sent to the production server; if the read production number is the same as the production number saved by the production server, data verification is passed, and the vehicle sequence of the conveying line is generated according to the production number, otherwise, manual acquisition of the production number is requested.

4. The vehicle informatization production method according to claim 1, characterized by, When assembly parts are supplied by a rack, the terminal is arranged on each station, and the terminal of any station acquires the assembly information according to the production number of the vehicle currently assembled at the station.

5. A vehicle production information system, which adopts the vehicle information production method according to any one of claims 1-4 to perform vehicle assembly on a conveying line, the system comprising: a production server for storing assembly information of a vehicle and a production number assigned according to the assembly information; a reading device arranged at each station of the conveying line for reading a production number and sending the production number to the production server, the reading device comprising a first reading device for reading a vehicle identification code and a second reading device for reading a radio frequency identification chip; an information carrier arranged on the vehicle and the station, comprising a vehicle identification code recording a production number and a radio frequency identification chip, and an electronic tag recording checkpoint information of the station; a terminal device arranged at each station of the conveying line and each trolley for receiving assembly information of a vehicle at the current station from the production server and displaying the information.

6. The vehicle production informatization system according to claim 5, wherein The station comprises a first station supplying assembly parts in a rack and a second station supplying assembly parts in the trolley.

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