Production line vehicle tracking method and system

Abstract

The invention discloses a production line vehicle tracking method and system, and belongs to the technical field of automobile assembly, and the method comprises the steps: carrying out the detection and recognition of a vehicle entering a set area of the head of a production line body, and obtaining the vehicle information; when the vehicle enters a set position point, storing the vehicle information into vehicle queue information; the moving distance of the vehicle is obtained, and the distance information between the vehicle and the set position point is updated in real time; and querying the information of the vehicle entering the current station in the vehicle queue information according to the information of the distance between the vehicle and the set position point and the post configuration information of the corresponding station, and automatically triggering the corresponding process operation. According to the invention, accurate tracking, queue tracking and post mistake proofing of various vehicle positions of a final assembly production line can be satisfied, an effective means is provided for binding of related parameters in a vehicle production process, and powerful data support is provided for later product quality problem analysis and product quality improvement.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile final assembly, and more specifically, to a production line vehicle tracking method and system. Background Art

[0002] In the entire process of automobile manufacturing, the final assembly line is the key link to assemble various parts into a complete car, and vehicle tracking plays an extremely important role in this link, which can be regarded as an important part of the manufacturing process. At present, in terms of vehicle tracking, the method of scanning codes at each workstation is adopted to achieve accurate vehicle tracking. The basic idea is to obtain vehicle-related information by scanning codes when the vehicle passes through different workstations, so as to understand the specific position of the vehicle in the production process and the corresponding process progress. However, this method has exposed many disadvantages in actual application.

[0003] First, when a vehicle arrives at a workstation and needs to be scanned for error prevention, it has to scan the code twice: first, the vehicle itself to obtain the basic identity information of the vehicle, and then the parts. The purpose is to bind the data related to the parts to the vehicle. This is time-consuming and labor-intensive, slowing down the pace of the entire production process. This method is difficult to achieve effective chain interaction with the production line.

[0004] Secondly, when the vehicle is at the workstation and needs to be tightened and error-proofed, it is necessary to scan the vehicle first to identify the specific vehicle, and then start the tightening equipment and bind the relevant data. Since there is an additional scanning and starting procedure, and the whole process is relatively cumbersome, it is easy to be negligent and miss the scan;

[0005] Secondly, when the vehicle needs to be tightened and error-proofed at the workstation, it is necessary to scan the vehicle first, and then start the tightening equipment to bind the data. It is easy to miss a scan. Once a scan is missed, the tightening equipment cannot accurately obtain the corresponding vehicle information and correct process parameters, resulting in the tightening effect not meeting the actual assembly requirements of the vehicle, affecting the assembly quality;

[0006] Furthermore, whether the vehicle is at a station that needs to be refueled (such as a station for refueling fuel, lubricating oil, coolant and other liquids), or at any other equipment that requires vehicle information, the vehicle information must be identified by scanning the code, and then the information is given to the corresponding equipment for data binding. The whole process involves many steps such as scanning codes, information transmission, and data binding, and the links are complicated. The probability of human error is high, which in turn has a serious negative impact on the assembly quality of the vehicle. Summary of the invention

[0007] An object of the present invention is to provide a production line vehicle tracking method and system to solve the problems of poor tracking accuracy, cumbersome operation, data binding errors, and impact on vehicle assembly quality caused by vehicle code scanning tracking on the aforementioned automobile assembly production line.

[0008] According to a first aspect of the present invention, there is provided a production line vehicle tracking method, comprising the following steps:

[0009] Step S100: Detect and identify vehicles entering a set area at the head of the production line to obtain vehicle information;

[0010] Step S200: When a vehicle enters a set position point, the vehicle information is stored in the vehicle queue information;

[0011] Step S300: Acquire the moving distance of the vehicle and update the distance information between the vehicle and the set position point in real time;

[0012] Step S400: Determine the current workstation where the vehicle is located based on the distance information between the vehicle and the set position point, query the vehicle information entering the current workstation in the vehicle queue information, and automatically trigger the corresponding process operation based on the job configuration information of the corresponding workstation.

[0013] Optionally, the step S100 includes:

[0014] Step S101: setting a first detection point at the starting position of the set area at the head of the production line, setting a second detection point at the end position of the set area at the head of the production line, and forming a read-write area between the first detection point and the second detection point;

[0015] Step S102: When the vehicle carrier passes through the first detection point, automatically detect whether there is a vehicle on the vehicle carrier, if not, automatically release it, if yes, trigger the RFID reader to automatically read and write vehicle information;

[0016] Step S103: When the vehicle passes the second detection point, it is automatically released if the vehicle information is read and written successfully. If the vehicle information is read and written failed, the production line is controlled to stop. After the production line stops, the vehicle information is manually triggered to be read and written. After the vehicle leaves the read and write area, the relevant read and write data is cleared.

[0017] Optionally, in step S200, the set position point is bound as a starting distance point and used as a starting point for the vehicle to enter the first workstation.

[0018] Optionally, in step S300,

[0019] The step of obtaining the moving distance of the vehicle comprises:

[0020] When the production line is running, the rotation pulse signals of the transmission parts of the production line are collected in real time;

[0021] Calculating the moving distance of the production line body according to the rotation pulse signal;

[0022] The moving distance of the production line body is characterized as the moving distance of the vehicle.

[0023] Optionally, in step S400, the position configuration information includes information of a starting distance point, a warning distance point, and an ending distance point.

[0024] Optionally, the production line vehicle tracking method further includes:

[0025] Step S500: When the vehicle moves from the starting distance point to the warning distance point within the range of the corresponding workstation, determine whether a feedback process operation completion signal is received. If so, control the corresponding workstation to be automatically released. If not, transmit the warning information and display the warning information.

[0026] Optionally, the step S500 further includes:

[0027] When the vehicle moves to the end distance point within the range of the corresponding workstation, it is determined whether a feedback process operation completion signal is received. If so, the corresponding workstation is controlled to be automatically released. If not, the production line is controlled to stop and the stop information is displayed.

[0028] Optionally, when a vehicle leaves a corresponding workstation, the position status information of the corresponding workstation is cleared, and the next vehicle is waiting to enter the workstation, wherein the position status information includes but is not limited to vehicle information and actual distance information of the vehicle.

[0029] According to a second aspect of the present invention, a production line vehicle tracking system is provided, which adopts the production line vehicle tracking method described in the first aspect of the present invention, including a vehicle detection sensor, an RFID reader / writer, an encoder, a PLC and a FAS system (manufacturing execution system), wherein:

[0030] The vehicle detection sensor is provided with at least one, and is arranged at the first detection point or the second detection point of the set area of ​​the production line head, and is used to detect and identify the vehicle entering the set area of ​​the production line head to obtain the arrival status of the vehicle;

[0031] The RFID reader is arranged in the reading and writing area at the head of the production line, and is used to read and write vehicle information;

[0032] The encoder detects signals according to the movement of the vehicle on the production line. When the vehicle enters the set position, the PLC stores the vehicle information in the vehicle queue information and binds the starting distance point. The encoder transmits the detected signal to the PLC, and the PLC counts the pulses to calculate the moving distance of the vehicle, and updates the distance information of the vehicle from the set position in real time.

[0033] The PLC determines the current workstation where the vehicle is located based on the distance information between the vehicle and the set position point, and queries the vehicle information entering the current workstation in the vehicle queue information, and automatically triggers the corresponding process operation based on the job configuration information of the corresponding workstation in the FAS system.

[0034] Optionally, the encoder is arranged in the head area of ​​the production line, and the encoder adopts a centimeter-level absolute value rotary encoder.

[0035] The production line vehicle tracking method and system disclosed in the present invention have the following technical effects:

[0036] By setting a vehicle detection sensor at the first detection point or the second detection point in the set area at the head of the production line, it is possible to accurately determine whether there is a vehicle on the vehicle carrier, avoid invalid operations when there is no vehicle, and promptly trigger the RFID reader to read and write vehicle information, providing a reliable data basis for subsequent production processes; the vehicle information reading and writing results are checked at the second detection point. If the reading and writing is successful, it is released. If it fails, the line is stopped and manual intervention is performed until success, to ensure the integrity and accuracy of the vehicle information and prevent quality problems in subsequent production links due to incorrect or missing information.

[0037] From the moment the vehicle enters the set position (i.e. the starting point of the first workstation), the PLC not only stores the vehicle information, but also binds the distance information to 0cm as the starting distance point, and automatically calculates and updates the distance information from the set position point during the movement of the vehicle. This allows the position of the vehicle on the production line to be accurately grasped. Whether in a single workstation or in the entire production process, the specific position of the vehicle can be clearly known, providing an accurate basis for grasping the timing of equipment operation, ensuring that the corresponding process operation is triggered at the appropriate location, and improving the coordination and accuracy of production.

[0038] In addition, you only need to scan the code once to push accurate vehicle information to the workstation equipment, and you can accurately bind the vehicle-related process parameters to the corresponding vehicle. This avoids the problems of scanning the vehicle code at each workstation in the existing technology, which is inefficient, has poor tracking accuracy, and cannot be linked with the production line.

[0039] According to the vehicle queue information calculated by PLC and the position configuration information of FAS system, the vehicle information entering the current workstation can be automatically queried, and the electric gun and scanning process and other operations can be automatically triggered according to the vehicle moving distance, and the vehicle can be automatically released after completion. The operation of each position is based on accurate vehicle information and precise position triggering, which can effectively realize the online quality error prevention of the position.

[0040] In the FAS system, the starting distance point, warning distance point, and ending distance point information of the job configuration information can be freely defined and sent to the PLC, so that the production line can adapt to the needs of different vehicle models, different production processes, and different layouts.

[0041] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0043] Figure 1 A schematic diagram of a process flow of a production line vehicle tracking method provided by an embodiment of the present invention;

[0044] Figure 2 A schematic diagram of the hardware deployment of a production line vehicle tracking system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0046] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0047] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0048] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0049] The present invention proposes an embodiment of a production line vehicle tracking method. Specifically, Figure 1 and Figure 2 As shown, the following steps are included:

[0050] Step S100: Detect and identify vehicles entering a set area at the head of the production line to obtain vehicle information;

[0051] Specifically, the FID reader in the set area at the head of the production line continuously transmits radio frequency signals of a specific frequency. When a vehicle enters the signal coverage area, the RFID tag pre-installed on the vehicle will receive the signal and respond, transmitting the detailed vehicle information stored in it back to the FID reader. This detailed vehicle information includes the vehicle's unique identification number (VIN), model details, production batch number, and some key technical parameters of the vehicle.

[0052] Step S200: When a vehicle enters a set position point, the vehicle information is stored in the vehicle queue information;

[0053] Specifically, the position point (such as Figure 2 The D point in the figure is bound as the starting distance point and serves as the starting point for the vehicle to enter the first workstation. When the vehicle moves along the production line and arrives at the set position accurately, the FAS system of the production line quickly starts the information storage process, which can organize and quickly store a large amount of vehicle information in an orderly manner and form vehicle queue information. As the vehicle moves, the vehicle queue information will be continuously updated to reflect the real-time position changes of the vehicle in the production line.

[0054] Step S300: Acquire the moving distance of the vehicle and update the distance information between the vehicle and the set position point in real time;

[0055] Specifically, the encoder is installed on the transmission components of the production line, such as the drive shaft of the conveyor belt or the sprocket shaft of the chain. When the vehicle moves on the production line, it will drive these transmission components to rotate. The encoder calculates the moving distance of the vehicle by detecting the rotational movement of the transmission components. The encoder transmits the detected rotation pulse signal to the PLC, and the PLC counts the pulses to calculate the moving distance of the production line, and the moving distance of the production line is characterized as the moving distance of the vehicle. For example, if the encoder generates 2000 pulses per rotation, the vehicle moves 50 cm when the transmission component rotates one circle, and when the number of pulses detected is 4000, it can be calculated that the vehicle has moved 100 cm.

[0056] Step S400: Determine the current workstation where the vehicle is located based on the distance information between the vehicle and the set position point, query the vehicle information entering the current workstation in the vehicle queue information, and automatically trigger the corresponding process operation based on the job configuration information of the corresponding workstation.

[0057] Specifically, as the vehicle continues to move on the production line, the PLC of the FAS system will continuously monitor the distance information of the vehicle from the set position point. Each workstation has its specific position range in the layout of the production line, and the starting distance, ending distance and corresponding job configuration information of each workstation are pre-set in the FAS system. When the real-time distance information of the vehicle indicates that it has entered the effective working range of a certain workstation, the FAS system will immediately query the database of vehicle queue information according to the job configuration information of the current workstation. The job configuration information also contains detailed requirements for the vehicles to be processed by the current workstation, such as specific models, production batch ranges, and process operation steps and process parameter requirements for these vehicles at the current workstation. For example, for an automobile assembly workstation, the job configuration information stipulates that only certain models and vehicles belonging to a specific production batch are assembled with specific parts, and clarifies the process parameters such as the tightening torque and parts installation sequence required for assembly. When the FAS system finds that the vehicle information entering the current workstation meets the job configuration requirements, it will automatically trigger the corresponding assembly operation. For example, instructions are sent to an assembly robot to inform it of the type, location, and assembly parameters of the required parts; or a signal is sent to a filling device to enable it to fill the vehicle with liquid according to the specified filling volume and filling speed.

[0058] In the embodiment of the present invention, step S100 includes:

[0059] Step S101: setting a first detection point at the starting position of the set area at the head of the production line, setting a second detection point at the end position of the set area at the head of the production line, and forming a read-write area between the first detection point and the second detection point;

[0060] Specifically, Figure 2 As shown, the first detection point is Figure 2 A in the second detection point is Figure 2 In the figure, two vehicle detection sensors are deployed at points A and C before the first station (station 01) of the production line (for a plate chain continuous line, only the vehicle detection sensor needs to be deployed at point A, and the vehicle detection sensor at point C can be simulated by an encoder). A read-write area is formed between points A and C, and point C is the stop point for read-write failure. Both vehicle detection sensors use high-precision proximity sensors or detection devices based on visual recognition technology.

[0061] Step S102: When the vehicle carrier passes the first detection point, automatically detect whether there is a vehicle on the vehicle carrier (such as Figure 2 If the vehicle is not detected, it will be automatically released. If the vehicle is detected, the RFID reader will be triggered to automatically read and write the vehicle information.

[0062] Specifically, a vehicle detection sensor is deployed at point A. When a vehicle enters the read-write area, it automatically detects whether there is a vehicle on the vehicle. An RFID reader is deployed between point A and point C to read and write vehicle information. After receiving the vehicle information, the RFID reader will perform a preliminary integrity and accuracy check on the information, such as checking whether the format of the information is correct and whether key data is missing. After the check is passed, the information will be transmitted to the FAS system of the production line.

[0063] Step S103: When the vehicle passes the second detection point, it is automatically released if the vehicle information is read and written successfully. If the vehicle information is read and written failed (for example, due to damage to the RFID electronic tag, reader failure, signal interference, etc.), the production line is controlled to stop. After the production line stops, the vehicle information is manually triggered to be read and written, and the relevant read and write data is cleared after the vehicle leaves the read and write area.

[0064] It should be noted that when a vehicle leaves the read-write area, the read-write data related to the vehicle in the read-write area will be automatically cleared, including temporary cache data and verification data during the read-write process. However, the basic information of the vehicle will be retained in the vehicle queue information of the FAS system so that the vehicle can continue to be tracked and managed in the subsequent production process. Only the specific data related to the operation in the read-write area will be cleared to avoid data redundancy and potential information leakage risks, and also prepare for the next time the vehicle enters the read-write area for information read-write operations.

[0065] In an embodiment of the present invention, in step S400, the post configuration information includes information on the starting distance point, the warning distance point, and the ending distance point. The starting distance point clearly defines the starting boundary of the vehicle entering the effective working range of a specific workstation. The warning distance point is located between the starting distance point and the ending distance point. It is a key position for early warning. Its setting is intended to reserve sufficient processing time for possible process operation delays or abnormal situations. The ending distance point marks the position boundary where the vehicle completes all scheduled process operations at the workstation.

[0066] In an embodiment of the present invention, the production line vehicle tracking method also includes step S500: when the vehicle moves from the starting distance point to the warning distance point within the range of the corresponding workstation, it is determined whether a feedback process operation completion signal is received. If so, the corresponding workstation is controlled to be automatically released; if not, the warning information is transmitted and displayed.

[0067] It should be noted that the warning distance point is set to 70% of the distance of the corresponding workstation range. When the vehicle gradually moves from the starting distance point into the corresponding workstation range until it reaches the warning distance point, the monitoring of the entire production line begins to make judgments and operations. The FAS system will monitor in real time whether the feedback of the process operation completion signal is received. The process operation completion signal comes from the operation feedback of each process equipment or operator at the workstation. For example, at a welding station, when the welding robot completes all the predetermined welding tasks of the welding points, it will send a process operation completion signal to the system, indicating that the welding process of the vehicle at this station has been successfully completed.

[0068] If the FAS system does not receive a process operation completion signal when the vehicle reaches the warning distance point, it indicates that the vehicle may have experienced a delay, failure, or other abnormal situation during the production process at that station. In order to promptly remind relevant personnel and take corresponding measures, the FAS system will immediately transmit warning information to the management system of the entire production line. The warning information includes the vehicle's identification code, current station, unfinished process operation name, expected delay time, etc.

[0069] In the embodiment of the present invention, step S500 further includes: when the vehicle moves to the end distance point within the range of the corresponding workstation, it is determined whether a feedback process operation completion signal is received, if so, the corresponding workstation is controlled to be automatically released, if not, the production line is controlled to stop, and the stop information is displayed. The stop information display includes displaying the warning information on the monitoring display screen of the production line, the handheld terminal of the operator, and the related sound and light alarm device.

[0070] In an embodiment of the present invention, when a vehicle leaves a corresponding workstation, the job status information of the corresponding workstation is cleared and the next vehicle is waiting to enter the workstation, wherein the job status information includes but is not limited to vehicle information, actual distance information of the vehicle, operation status information, line stop status information, and alarm information.

[0071] In the embodiment of the present invention, the starting distance point, warning distance point, and ending distance point information of the post configuration information can be freely defined in the FAS system and sent to the PLC, so that the production line can adapt to the needs of different vehicle models, different production processes, and different layouts. Specifically, the FAS system has a powerful and flexible user interface, allowing managers to freely set the starting distance point, warning distance point, and ending distance point information of each post according to actual needs. Special configuration files can be established for different vehicle models to record in detail the optimal distance point parameters of each vehicle model at each post.

[0072] The present invention also provides an embodiment of a production line vehicle tracking system, which adopts any of the above production line vehicle tracking methods, and the system includes a vehicle detection sensor, an RFID reader / writer, an encoder, a PLC and a FAS system, wherein:

[0073] At least one vehicle detection sensor is provided, and is arranged at the first detection point or the second detection point in the set area of ​​the production line head, for detecting and identifying the vehicle entering the set area of ​​the production line head to obtain the vehicle's arrival status; wherein, the first detection point and the second detection point are respectively deployed with a vehicle detection sensor (for a plate chain type continuous line, only one of the detection points needs to be deployed with a vehicle detection sensor, and the vehicle detection sensor at the other detection point can be simulated by an encoder), and both vehicle detection sensors use high-precision proximity sensors or detection devices based on visual recognition technology.

[0074] The RFID reader is set in the reading and writing area at the head of the production line to read and write vehicle information;

[0075] The encoder detects signals based on the movement of the vehicle on the production line. When the vehicle enters the set position, the vehicle information is stored in the vehicle queue information through the PLC and bound to the starting distance point. The encoder transmits the detected signal to the PLC, which counts pulses, calculates the moving distance of the vehicle, and updates the distance information of the vehicle from the set position in real time.

[0076] The PLC queries the vehicle information entering the current position in the vehicle queue information based on the distance information between the vehicle and the set position point, and the job configuration information of the corresponding workstation in the FAS system, and automatically triggers the corresponding process operations (such as tightening, scanning, filling, etc.).

[0077] In an embodiment of the present invention, the encoder is arranged in the head area of ​​the production line, and the encoder adopts a centimeter-level absolute value rotary encoder. This has extremely high precision and can achieve a measurement resolution accurate to the centimeter level. The encoder converts the rotation signal of the transmission component on the production line into a pulse signal, and transmits the pulse signal to the PLC. The PLC calculates the moving distance of the vehicle by accurately counting the number of pulses and combining the resolution of the encoder and the transmission ratio of the transmission component and the vehicle movement. The FAS system provides important job configuration information support for the vehicle tracking system. The PLC interacts with the FAS system to obtain the job configuration information of the corresponding workstation in the FAS system. Based on the distance information of the vehicle from the set position point and the vehicle information entering the current position queried from the vehicle queue information, the PLC can perform complex logical judgments. For example, when the vehicle moves to the starting distance point of a certain workstation, the PLC begins to prepare for the process operations required for the workstation; when the vehicle reaches the warning distance point, the PLC determines whether it has received the feedback signal that the process operation of the workstation is completed. If not, it will send a warning message to the system and take corresponding emergency measures; when the vehicle reaches the ending distance point and the process operation is completed, the PLC automatically triggers the release mechanism of the workstation, allowing the vehicle to smoothly enter the next production link.

[0078] The FAS system also has the ability to monitor and analyze the operating status of the entire production line. It can collect real-time operating data from the PLC, such as the vehicle's residence time at each workstation, the execution results of process operations, equipment fault alarm information, etc., thereby providing strong data basis and decision-making support for the continuous improvement and efficient operation of the production line.

[0079] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings, but the above is only a preferred embodiment of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched into a variety of equivalent schemes by those skilled in the art without departing from or changing the design ideas and technical effects of the present invention; therefore, the present invention is not limited to the scope of implementation shown in the drawings, and all changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification and drawings, should be within the protection scope of the present invention.

Claims

1. A production line vehicle tracking method, characterized in that: The following steps are involved: Step S100: Detect and identify vehicles entering a set area at the head of the production line to obtain vehicle information; Step S200: When a vehicle enters a set position point, the vehicle information is stored in the vehicle queue information; Step S300: Acquire the moving distance of the vehicle and update the distance information between the vehicle and the set position point in real time; Step S400: Determine the current workstation where the vehicle is located based on the distance information between the vehicle and the set position point, query the vehicle information entering the current workstation in the vehicle queue information, and automatically trigger the corresponding process operation based on the job configuration information of the corresponding workstation.

2. The production line vehicle tracking method according to claim 1, characterized in that: The step S100 includes: Step S101: setting a first detection point at the starting position of the set area at the head of the production line, setting a second detection point at the end position of the set area at the head of the production line, and forming a read-write area between the first detection point and the second detection point; Step S102: When the vehicle carrier passes through the first detection point, automatically detect whether there is a vehicle on the vehicle carrier, if not, automatically release it, if yes, trigger the RFID reader to automatically read and write vehicle information; Step S103: When the vehicle passes the second detection point, it is automatically released if the vehicle information is read and written successfully. If the vehicle information is read and written failed, the production line is controlled to stop. After the production line stops, the vehicle information is manually triggered to be read and written. After the vehicle leaves the read and write area, the relevant read and write data is cleared.

3. The production line vehicle tracking method according to claim 1, characterized in that: In step S200, the set position point is bound as a starting distance point and used as a starting point for the vehicle to enter the first workstation.

4. The production line vehicle tracking method according to claim 1, characterized in that: In step S300, obtaining the moving distance of the vehicle includes: When the production line is running, the rotation pulse signals of the transmission parts of the production line are collected in real time; Calculating the moving distance of the production line body according to the rotation pulse signal; The moving distance of the production line body is characterized as the moving distance of the vehicle.

5. The production line vehicle tracking method according to claim 1, characterized in that: In step S400, the position configuration information includes information of a starting distance point, a warning distance point, and an ending distance point.

6. The production line vehicle tracking method according to claim 5, characterized in that: Also includes: Step S500: When the vehicle moves from the starting distance point to the warning distance point within the range of the corresponding workstation, determine whether a feedback process operation completion signal is received. If so, control the corresponding workstation to be automatically released. If not, transmit the warning information and display the warning information.

7. The production line vehicle tracking method according to claim 6, characterized in that: The step S500 further includes: When the vehicle moves to the end distance point within the range of the corresponding workstation, it is determined whether a feedback process operation completion signal is received. If so, the corresponding workstation is controlled to be automatically released. If not, the production line is controlled to stop and the stop information is displayed.

8. The production line vehicle tracking method according to claim 7, characterized in that: When the vehicle leaves the corresponding workstation, the position status information of the corresponding workstation is cleared, and the next vehicle is waiting to enter the workstation, wherein the position status information includes but is not limited to vehicle information and actual distance information of the vehicle.

9. A production line vehicle tracking system, characterized in that: The production line vehicle tracking method according to any one of claims 1 to 8 comprises a vehicle detection sensor, an RFID reader / writer, an encoder, a PLC and a FAS system, wherein: The vehicle detection sensor is provided with at least one, and is arranged at the first detection point or the second detection point of the set area of ​​the production line head, and is used to detect and identify the vehicle entering the set area of ​​the production line head to obtain the arrival status of the vehicle; The RFID reader is arranged in the reading and writing area at the head of the production line, and is used to read and write vehicle information; The encoder detects signals according to the movement of the vehicle on the production line. When the vehicle enters the set position, the PLC stores the vehicle information in the vehicle queue information and binds the starting distance point. The encoder transmits the detected signal to the PLC, and the PLC counts the pulses to calculate the moving distance of the vehicle, and updates the distance information of the vehicle from the set position in real time. The PLC queries the vehicle information entering the current workstation in the vehicle queue information according to the distance information of the vehicle from the set position point and the job configuration information of the corresponding workstation in the FAS system, and automatically triggers the corresponding process operation.

10. The production line vehicle tracking system according to claim 9, characterized in that: The encoder is arranged in the head area of ​​the production line, and the encoder adopts a centimeter-level absolute value rotary encoder.

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