System, method and equipment for adjusting time sequence of adjacent stations based on PLC (Programmable Logic Controller)

Abstract

The invention relates to the technical field of time sequence adjustment, and particularly discloses a PLC-based adjacent station time sequence adjustment system, method and equipment, and the system comprises an adjacent station access module, a stability index evaluation module, a stable state judgment module and an adjacent station adjustment module. Accessing and marking adjacent stations as a first station and a second station by utilizing a shift register of the PLC through an adjacent station access module; the stability index evaluation module collects equipment operation data of a first station in real time based on a PLC input and output interface in a first stability evaluation time period, and evaluates equipment execution stability indexes; the stable state judgment module extracts stable duration according to the index and a timer of the PLC, and judges whether the first station is stable or not; the adjacent station adjusting module is used for adjusting the time sequence of the adjacent stations or stably repairing the first station through the PLC according to the stable state of the first station, so that intelligent time sequence adjustment and stable control are realized, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of timing adjustment, and in particular to a PLC-based adjacent workstation timing adjustment system, method and equipment. Background Art

[0002] In modern industrial automation production lines, especially assembly line operations, the timing coordination of adjacent workstations directly impacts the efficiency, stability, and product quality of the entire production line. As the core control device for industrial automation, PLCs (Programmable Logic Controllers) are widely used in production line logic control and timing management due to their high reliability, strong anti-interference capabilities, and flexible programming. They significantly improve production line stability, efficiency, and adaptability, and are an indispensable component of modern intelligent manufacturing systems.

[0003] For example, the invention patent with announcement number CN117170329A discloses a control method for a GIS shell assembly production line. It involves first establishing a main line consisting of multiple conveyor lines. Several workstations are arranged around the main line along the assembly sequence of the GIS shell, including a dynamic side processing station and a static side processing station. Each of the dynamic side processing station and the static side processing station is provided with a branch line. Several turning mechanisms are provided on each main line, and several load-bearing devices are provided on the main line and each branch line. The main control background primarily controls the proximity switches and control panels at each workstation to achieve the movement of the conveyor lines and the operation of the load-bearing devices at each workstation. The main control background also effectively connects the production of GIS shells between two adjacent workstations through control of the main control background. The assembly method, in which the main line and branch lines are coordinated, is also operated under the control of the relevant equipment of the main control background.

[0004] For example, invention patent publication number CN106406260B discloses a transmission control method, device, and system for a production line. At least two product transmission devices are installed between adjacent workstations on the production line. The method includes detecting whether the product transmission device on the upper workstation side of the adjacent product transmission devices is activated; if the product transmission device on the upper workstation side is activated, a start signal is sent to the product transmission device on the lower workstation side.

[0005] Combining the above technical solutions, it is found that the existing workstation timing adjustment solutions are mostly based on fixed workstation sequences and preset processes, lack the adaptability of workstation timing adjustment, and the timing coordination logic of existing technologies in complex scenarios is not perfect, which reduces the real-time and coordination of workstation timing adjustment. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a PLC-based adjacent workstation timing adjustment system, method and device, which can effectively solve the problems involved in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: In the first aspect, the present invention provides a PLC-based adjacent workstation timing adjustment system, including: an adjacent workstation access module, which is used to access the sequential control of the adjacent workstation through the PLC shift register, and mark the adjacent workstations in sequence as the first workstation and the second workstation; a stability index evaluation module, which is used to collect the equipment operation data of the first workstation in real time based on the PLC input and output interface during the first stability evaluation period, and evaluate the equipment execution stability index of the first workstation; a stable state judgment module, which is used to extract the stability duration of the first workstation based on the equipment execution stability index of the first workstation and the PLC timer, and determine whether the first workstation is in a stable state; an adjacent workstation adjustment module, which is used to adjust the timing of the adjacent workstation through the PLC when the first workstation is in a stable state, and to perform stability repair on the first workstation through the PLC when the first workstation is in an unstable state.

[0008] As a further solution, it is determined whether the first workstation is in a stable state. The specific determination process is: the equipment execution stability index of the first workstation is extracted in real time, and verified with the predefined stable interval. The timer collects the stable duration when the equipment execution stability index of the first workstation belongs to the stable interval during the first stable evaluation period, and records it as the stable duration of the first workstation; the stable duration of the first workstation is compared with the predefined stable continuous adaptation time. If the stable duration of the first workstation is greater than or equal to the stable continuous adaptation time, it is determined that the first workstation is in a stable state, and the timing of the second workstation is adjusted. If the stable duration of the first workstation is less than the stable continuous adaptation time, it is determined that the first workstation is not in a stable state, and the first workstation is stabilized and repaired.

[0009] As a further solution, the timing of adjacent workstations is adjusted. The specific adjustment process is as follows: extract the execution status of the second workstation, where the execution status includes idle state and busy state; when the execution status of the second workstation is in idle state, collect the current execution time of the process of the first workstation, perform difference processing on the preset default completion time of the process of the first workstation and the current execution time of the process of the first workstation, obtain the remaining execution time of the process of the first workstation, match it to obtain the start waiting time of the second workstation, that is, after the start waiting time, the jump instruction of the PLC is used to control the second workstation. The second workstation starts automatically and is used to take over the process task of the first workstation. At the same time, the remaining process execution time of the first workstation and the start-up waiting time of the second workstation are differenced to obtain the collaborative time deviation of the adjacent workstations, and the process execution rate correction of the first workstation is obtained by matching. The real-time process execution rate of the first workstation is collected and added to the process execution rate correction of the first workstation to obtain the process execution adaptation rate of the first workstation, which is used to configure the execution rate of the next process task of the first workstation; when the execution status of the second workstation is in a busy state, the waiting state of the adjacent workstation is determined.

[0010] As a further solution, the waiting status of adjacent workstations is determined. The specific determination process is: collect the waiting amount of the process task of the second workstation. If the waiting amount of the process task of the second workstation is not zero, it is determined that the first workstation does not need to wait. Based on the jump instruction of the PLC, the first workstation is controlled to put the current workpiece into the process task waiting queue of the second workstation for execution, and the waiting amount of the process task of the second workstation is extracted. The process execution adaptation rate of the second workstation is matched and used to configure the next process execution rate of the second workstation; if the process task waiting amount of the second workstation is zero, the equipment execution data of the second workstation is collected, the equipment execution stability index of the second workstation is determined, the process time correction factor of the second workstation is matched, the default process execution time of the second workstation is extracted, and the second workstation is matched. The process duration correction factor of the workstation is data coupled to obtain the process correction execution time of the second workstation, the current process execution time of the second workstation is collected, the process correction execution time of the second workstation is subtracted from the current process execution time of the second workstation to obtain the remaining process execution time of the second workstation, and the difference is processed with the remaining process execution time of the first workstation to obtain the process waiting deviation of the adjacent workstation, and the waiting status of the adjacent workstation is continuously determined; the equipment execution data of the second workstation, including the speed following error of the second workstation, the acceleration fluctuation rate of the second workstation and the current harmonic distortion rate of the second workstation, are normalized respectively to obtain the normalized processing results, and the normalized processing results are weighted and aggregated in turn to obtain the equipment execution stability index of the second workstation.

[0011] As a further solution, the waiting status of adjacent workstations is continuously determined. The specific determination process is: compare the process waiting deviation of the adjacent workstation with the predefined process waiting permission deviation. If the process waiting deviation of the adjacent workstation is less than or equal to the process waiting permission deviation, it is determined that the adjacent workstation needs to wait; when the process waiting deviation of the adjacent workstation is greater than the process waiting permission deviation, it is determined that the first workstation does not need to wait, and the jump instruction based on the PLC controls the first workstation to put the current workpiece into the process task waiting queue of the second workstation for execution. At the same time, according to the process waiting deviation of the adjacent workstation, the process execution rate correction of the second workstation is matched, the real-time process execution rate of the second workstation is collected, and added to the process execution rate correction of the second workstation to obtain the process execution adaptation rate of the second workstation, which is used to configure the next process execution rate of the second workstation.

[0012] As a further solution, the first workstation is stabilized and repaired. The specific repair process is: when the stability duration of the first workstation is continuously less than the stability duration adaptation time, the equipment stability repair of the first workstation is started. The specific repair process is: subtract the stability duration adaptation time from the stability duration of the first workstation to obtain the stability duration deviation of the first workstation, match it to obtain the shock absorber damping force adaptation value, and increase the initial value of the shock absorber damping force to the adaptation value of the shock absorber damping force; based on the PLC input and output interface, extract the workpiece data of the first workstation during the process completion period, and determine the workpiece quality index of the first workstation , based on the conditional judgment instruction of the PLC, it is determined whether the equipment should be repaired again; the workpiece data of the first station during the process completion period, including the molecular uniform orientation degree of the workpiece at the first station, the dielectric constant of the workpiece at the first station, and the ultrasonic attenuation coefficient of the workpiece at the first station; the dielectric reference constant is extracted from the timing adjustment management library; the molecular uniform orientation degree of the workpiece at the first station, the dielectric constant of the workpiece at the first station, and the ultrasonic attenuation coefficient of the workpiece at the first station are normalized respectively to obtain normalized results, and the normalized results are weighted and aggregated in turn to obtain the workpiece quality index of the first station.

[0013] The second aspect of the present invention provides a method for adjusting the timing of adjacent workstations based on PLC, including: accessing the sequential control of adjacent workstations through the shift register of the PLC, and marking the adjacent workstations in sequence as the first workstation and the second workstation; based on the PLC input and output interface during the first stability evaluation period, collecting the equipment operation data of the first workstation in real time, and evaluating the equipment execution stability index of the first workstation; according to the equipment execution stability index of the first workstation and based on the timer of the PLC, extracting the stability duration of the first workstation, and determining whether the first workstation is in a stable state; when the first workstation is in a stable state, adjusting the timing of the adjacent workstations through the PLC, and when the first workstation is in an unstable state, performing stability repair on the first workstation through the PLC.

[0014] The third aspect of the present invention provides an electronic device, characterized in that the electronic device includes a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device is triggered to execute a PLC-based adjacent workstation timing adjustment system.

[0015] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects: (1) The present invention provides a PLC-based adjacent workstation timing adjustment system, which uses the PLC shift register to access and mark adjacent workstations as the first workstation and the second workstation through the adjacent workstation access module; the stability index evaluation module collects the equipment operation data of the first workstation in real time based on the PLC input and output interface during the first stability evaluation period, and evaluates the equipment execution stability index; the stability state judgment module extracts the stability duration based on the index and the PLC timer to determine whether the first workstation is stable; the adjacent workstation adjustment module adjusts the timing of the adjacent workstation or performs stability repair on the first workstation through the PLC according to the stability state of the first workstation, so as to realize intelligent timing adjustment and stability control, thereby improving production efficiency and equipment stability.

[0016] (2) The present invention collects the equipment operation data of the first station and evaluates the equipment execution stability index of the first station, which can help production line supervisors to promptly discover equipment anomalies, take measures in advance, avoid the expansion of equipment failures, and reduce production interruptions caused by sudden failures. By monitoring the equipment operation status in real time and adjusting the equipment operation parameters in a timely manner, the equipment can be prevented from operating in an abnormal state, reducing equipment wear and fatigue, and extending the service life of the equipment. It can ensure that the equipment operates in a stable state, reduce production interruptions or production speed reductions caused by equipment anomalies, and improve overall production efficiency. In addition, stable equipment operation is the basis for ensuring product quality. By evaluating the equipment stability index, the equipment status can be adjusted in a timely manner to avoid product quality problems caused by equipment anomalies.

[0017] (3) The present invention extracts the workpiece data of the first workstation during the process completion period and determines the workpiece quality index of the first workstation. This can not only help production personnel quickly discover quality problems that occur during the production process and take timely measures to adjust and improve them to avoid the production of a large number of defective products, but also ensure that the quality of each workpiece meets the standard requirements through real-time monitoring and determination of workpiece quality, thereby improving the consistency and stability of product quality. By grasping the workpiece quality status in real time, the production process is made more controllable, which helps production management personnel make decisions in a timely manner, adjust production plans and resource allocation, and combine the workpiece quality index with equipment operation data to provide a direct basis for equipment adjustment and optimization, forming a closed-loop control, and further improving equipment stability and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of system module connections of the present invention.

[0020] Figure 2 Schematic diagram of the method steps of the present invention.

[0021] Figure 3 This is the flow chart for determining the stable state of the first workstation.

[0022] Figure 4 Flowchart for timing adjustment of the second workstation. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Reference Figure 1 As shown, the first aspect of the present invention provides a PLC-based adjacent workstation timing adjustment system, comprising: an adjacent workstation access module, a stability index evaluation module, a stable state determination module, an adjacent workstation adjustment module, and a timing adjustment management library. The timing adjustment management library is used to store the dielectric reference constant, preset values of various factors, and preset values of various weight parameters.

[0025] The adjacent workstation access module is connected to the stability index evaluation module, the stability index evaluation module is connected to the stable state judgment module, the stable state judgment module is connected to the adjacent workstation adjustment module, and the stability index evaluation module, the stable state judgment module and the adjacent workstation adjustment module are all connected to the timing adjustment management library.

[0026] The adjacent workstation access module is used to access the sequential control of adjacent workstations through the shift register of the PLC, and mark the adjacent workstations as the first workstation and the second workstation in sequence.

[0027] PLC-based shift register instructions enable workpiece transfer and processing sequence control between workstations. This is achieved by connecting devices at each workstation (such as sensors and actuators) to the PLC's input / output modules. The size and initial state of the shift register are defined in the PLC program. The number of bits in the shift register is typically determined by the number of workstations and control requirements. Initial data is loaded into the shift register. This initial data can be a signal indicating the arrival of a workpiece at the first workstation. For example, when the input point at the first workstation detects the arrival of a workpiece, the corresponding bit in the shift register is set to 1, indicating that a workpiece is available for processing at that workstation. Shift operations are typically triggered by a timer or an event. After each shift operation, the status of each bit in the shift register is evaluated. If a bit is 1, the corresponding workstation needs to execute a task. The shift register continuously shifts, controlling the actions of each workstation based on the shift results.

[0028] The stability index evaluation module is used to collect the equipment operation data of the first workstation in real time based on the PLC input and output interface during the first stability evaluation period, and evaluate the equipment execution stability index of the first workstation.

[0029] The above-mentioned system, based on the PLC input and output interface, collects the equipment operation data of the first workstation in real time. Specifically, according to the operating characteristics of the equipment at the first workstation and the type of data to be collected, selects appropriate sensors, such as fiber optic sensors, resistance strain gauge sensors, acceleration sensors, laser displacement sensors, etc., and electrically connects the output end of the sensor to the input interface of the PLC. The PLC has an integrated signal filtering circuit that can filter the signal input by the sensor, remove high-frequency noise and interference signals, and improve the quality and stability of the signal. The input interface of the PLC can convert signals of different types and sizes output by the sensor into digital signals suitable for internal processing. During the conversion process, the PLC will quantize, encode, and process the signal to ensure the accuracy and stability of the signal so that it can be correctly identified and processed by the program inside the PLC.

[0030] Specifically, the equipment execution stability index of the first workstation is evaluated. The specific evaluation process is as follows: The equipment operation data of the first station include the linearity of the equipment damping coefficient of the first station, the maximum deviation of the equipment thermal expansion coefficient of the first station, the transient load impact frequency of the equipment at the first station, and the multi-degree-of-freedom coupling amplitude of the first station; among which the linearity of the equipment damping coefficient can be monitored by a fiber optic sensor, the deviation of the equipment thermal expansion coefficient can be monitored by a resistance strain gauge sensor, the transient load impact frequency of the equipment can be monitored by an acceleration sensor, and the multi-degree-of-freedom coupling amplitude can be monitored by a laser displacement sensor.

[0031] Normalize the linearity of the damping coefficient of the equipment at the first station, the maximum deviation of the thermal expansion coefficient of the equipment at the first station, the transient load impact frequency of the equipment at the first station, and the multi-degree-of-freedom coupling amplitude of the first station to obtain normalized results. Then, perform weighted aggregation on the normalized results to obtain the equipment execution stability index of the first station. The specific analysis method is as follows:

[0032] Where, Execute stability indicators for the equipment at the first station, is the normalized value of the linearity of the damping coefficient of the equipment at the first station, is the normalized value of the maximum deviation of the thermal expansion coefficient of the equipment at the first station, is the normalized value of the transient load impact frequency of the equipment at the first station, is the normalized value of the multi-degree-of-freedom coupling amplitude of the first station, The weight parameter corresponding to the linearity of the device damping coefficient predefined in the timing adjustment management library, The weight parameter corresponding to the device thermal expansion coefficient deviation predefined in the timing adjustment management library, The weight parameter corresponding to the equipment transient load impact frequency predefined in the timing adjustment management library, It is used to adjust the weight parameters corresponding to the multi-degree-of-freedom coupling amplitudes predefined in the timing management library.

[0033] It needs to be explained that the linearity of the damping coefficient of the above-mentioned equipment refers to the linear degree of the change of the damping coefficient with the operating state of the equipment (such as speed, load, etc.). Good damping coefficient linearity means that under different operating states, the change of the damping coefficient is uniform and stable, showing a linear relationship; the maximum deviation of the thermal expansion coefficient of the equipment refers to the maximum difference in the thermal expansion coefficients between different components of the equipment; the transient load impact frequency of the equipment refers to the number of transient load impacts of the equipment per unit time. A high impact frequency means that the equipment is frequently subjected to impact loads in a short period of time, which will cause the equipment to bear greater dynamic stress and easily cause vibration and fatigue damage; the multi-degree-of-freedom coupling amplitude refers to the coupling of the vibration intensity of the equipment in each degree of freedom direction, usually expressed by the amplitude of displacement, velocity or acceleration.

[0034] Among them, the weight parameters corresponding to the linearity of the device damping coefficient, the weight parameters corresponding to the deviation of the device thermal expansion coefficient, the weight parameters corresponding to the transient load impact frequency of the device, and the weight parameters corresponding to the multi-degree-of-freedom coupling amplitude are all extracted from the timing adjustment management library, and the mapping relationship can be a one-to-one correspondence or a many-to-one relationship. For example, the linearity of the device damping coefficient, the deviation of the device thermal expansion coefficient, the transient load impact frequency of the device, and the multi-degree-of-freedom coupling amplitude are respectively mapped to the weight parameters corresponding to the linearity of the device damping coefficient, the weight parameters corresponding to the deviation of the device thermal expansion coefficient, the weight parameters corresponding to the transient load impact frequency of the device, and the weight parameters corresponding to the multi-degree-of-freedom coupling amplitude predefined in the timing adjustment management library to form a mapping set. The real-time linearity of the device damping coefficient, the deviation of the device thermal expansion coefficient, the transient load impact frequency of the device, and the multi-degree-of-freedom coupling amplitude are brought into the mapping set to obtain the weight parameters corresponding to the linearity of the device damping coefficient, the weight parameters corresponding to the deviation of the device thermal expansion coefficient, the weight parameters corresponding to the transient load impact frequency of the device, and the weight parameters corresponding to the multi-degree-of-freedom coupling amplitude.

[0035] In this embodiment, a multivariate analysis of the equipment's damping coefficient linearity, equipment thermal expansion coefficient deviation, equipment transient load impact frequency, and multi-degree-of-freedom coupling amplitude is performed, specifically considering the correlation between these parameters. Component dimensional changes caused by the maximum thermal expansion coefficient deviation affect the contact area and pressure between the damping material and the component. Reduced contact area or uneven pressure can weaken the damping effect, leading to reduced damping coefficient linearity and negatively impacting the equipment's operational stability at the first station. High transient load impact frequency means the equipment experiences multiple impacts in a short period of time, which causes the damping system to continuously operate. If the damping coefficient linearity is poor, the damping system cannot effectively dissipate the impact energy, causing it to accumulate in the equipment structure, resulting in greater vibration and stress concentration, significantly reducing the equipment's operational stability at the first station. Transient load impacts generate stress waves in the equipment structure, which, during propagation, induce vibrations in multiple degrees of freedom. At higher impact frequencies, the superposition effect of these stress waves is more pronounced, increasing the multi-degree-of-freedom coupling amplitude and reducing the equipment's operational stability at the first station.

[0036] The stable state determination module is used to extract the stable duration of the first workstation based on the equipment execution stability index of the first workstation and the timer of the PLC to determine whether the first workstation is in a stable state.

[0037] The above-mentioned PLC-based timer extracts the stable duration of the first workstation. Specifically, it clarifies the conditions for the first workstation to be in a stable state, that is, the equipment execution stability index of the first workstation belongs to the stable range within the first stable evaluation period. The logic is written in the PLC program to determine whether the first workstation meets the stable state conditions. When the first workstation is detected to have entered a stable state, the timer is triggered to start timing. After the timer starts timing, the PLC will accumulate timing according to the preset time unit. During the timing process, the PLC continues to monitor the operating status of the first workstation in real time to ensure that it remains in a stable state. After the stable duration is extracted, or when the stable state of the first workstation is broken, the PLC will stop the timer and save the current timing value of the timer. Ensure that the timer timing accurately reflects the actual stable duration of the first workstation. The PLC timer includes a PLC stable state timer and a PLC process waiting timer.

[0038] In this embodiment, the specific process of determining whether the first station is in a stable state is as follows: Figure 3 As shown, Figure 3 This is a flowchart for determining the stability of the first workstation. The system extracts the stability index of the equipment at the first workstation in real time and verifies it against a predefined stability interval. The PLC's timer also collects the duration of stability when the equipment's stability index falls within the stability interval during the first stability assessment period. If this duration is greater than or equal to the predefined stability adaptation duration, the first workstation is considered stable and timing adjustments can be made to the second workstation. Conversely, if this duration is less than the stability adaptation duration, the first workstation is considered unstable and requires stabilization repair.

[0039] Furthermore, it is determined whether the first station is in a stable state. The specific determination process is as follows: The equipment execution stability index of the first workstation is extracted in real time and verified with the predefined stability interval. The timer collects the stability duration when the equipment execution stability index of the first workstation belongs to the stability interval during the first stability evaluation period, and records it as the stability duration of the first workstation.

[0040] Compare the stable duration of the first workstation with the predefined stable continuous adaptation duration. If the stable duration of the first workstation is greater than or equal to the stable continuous adaptation duration, it is determined that the first workstation is in a stable state, and the timing of the second workstation is adjusted. If the stable duration of the first workstation is less than the stable continuous adaptation duration, it is determined that the first workstation is not in a stable state, and the first workstation is stabilized and repaired.

[0041] By determining whether the first station is stable, abnormal changes in equipment operating status can be promptly detected. When the first station is stable, the second station's timing is promptly adjusted to ensure production continuity and reduce waiting time caused by equipment instability. Accurately determining equipment stability avoids unnecessary production interruptions and improves overall production efficiency. When the first station is unstable, a stabilization repair program is promptly initiated, reducing the probability of equipment failure and extending equipment life. Through real-time monitoring and timely repairs, the equipment can be prevented from operating in an unstable state for a long time, reducing damage caused by equipment anomalies.

[0042] The adjacent workstation adjustment module is used to adjust the timing of the adjacent workstations through PLC when the first workstation is in a stable state, and to stabilize and repair the first workstation through PLC when the first workstation is in an unstable state.

[0043] Specifically, the timing of adjacent workstations is adjusted. The specific adjustment process is as follows: In this embodiment, the specific adjustment process of adjusting the timing of adjacent workstations is as follows: Figure 4 As shown, Figure 4 The timing adjustment flowchart for the second workstation is created by extracting its execution status (idle or busy). If it is idle, the current execution time of the first workstation is collected, the remaining duration of the process is calculated, and the start-up waiting time of the second workstation is determined. The PLC triggers the start. Simultaneously, the coordination time deviation is determined based on the time difference, and the rate correction value of the first workstation is matched to obtain the adapted rate. If it is busy, the waiting status of the adjacent workstation is determined and adjusted accordingly.

[0044] Extract the execution status of the second workstation. The specific execution status can be extracted from the operation log of the second workstation, where the execution status includes idle state and busy state.

[0045] When the execution status of the second workstation is in an idle state, the current execution time of the process of the first workstation is collected, where the current execution time of the process can be extracted from the execution log of the first workstation, and the preset default completion time of the process of the first workstation is subtracted from the current execution time of the process of the first workstation to obtain the remaining execution time of the process of the first workstation, and the start waiting time of the second workstation is matched. That is, after the start waiting time, the second workstation is controlled to start automatically based on the jump instruction of the PLC to take over the process task of the first workstation. At the same time, the remaining execution time of the process of the first workstation is subtracted from the start waiting time of the second workstation to obtain the collaborative time deviation of the adjacent workstations, and the process execution rate correction of the first workstation is matched, and the real-time execution rate of the process of the first workstation is collected, where the real-time execution rate of the process can be extracted from the execution log of the first workstation, and added to the process execution rate correction of the first workstation to obtain the process execution adaptation rate of the first workstation, which is used to configure the execution rate of the next process task of the first workstation.

[0046] The above-mentioned default completion time of the process represents the pre-set reference time required to complete the process, which is used to plan and coordinate the time arrangement of the process.

[0047] The above-mentioned process's current execution duration represents the actual time elapsed from the start of the current process to the present. It reflects the time elapsed since the process reached its current stage and is a real-time updated value. Furthermore, due to the existence of the stable duration, it indicates the time interval during which the equipment reaches and maintains a stable state while executing the corresponding process. Since the process's current execution duration accumulates from the moment it is executed, there is a stable duration within the current execution duration, so the current execution duration is non-zero.

[0048] The remaining duration of an operation is the difference between the predicted completion time and the current execution time. This represents the time required to complete the current operation. It is used to measure the progress of an operation and determine the waiting time for subsequent operations.

[0049] The above matching obtains the start-up waiting time of the second workstation, specifically, matching the remaining execution time of the process of the first workstation with the start-up waiting time corresponding to the predefined remaining execution time interval of each process, determining the specific interval of the remaining execution time of the process of the first workstation, and allocating the start-up waiting time corresponding to the interval to the second workstation to obtain the start-up waiting time of the second workstation.

[0050] The above matching obtains the process execution rate correction value of the first workstation, specifically, matching the collaborative time deviation of adjacent workstations with the process execution rate correction values corresponding to each predefined collaborative time deviation interval, determining the specific interval of the collaborative time deviation of adjacent workstations, and assigning the process execution rate correction value corresponding to the interval to the first workstation to obtain the process execution rate correction value of the first workstation.

[0051] When the execution status of the second workstation is in a busy state, the waiting state of the adjacent workstation is determined.

[0052] By collecting real-time data on the first workstation's equipment execution stability indicators and the current process execution time, we can accurately predict the process completion time and, based on this, determine the startup wait time for the second workstation. This ensures seamless operation between adjacent workstations, reduces unnecessary waiting time, and improves production efficiency. Based on the deviation in the collaborative time between adjacent workstations, we dynamically adjust the process execution rate of the first workstation, streamlining the production process and avoiding bottlenecks or congestion caused by process execution rate mismatches. When the second workstation is idle, reasonable timing adjustments allow it to start and take over the process tasks of the first workstation promptly, reducing equipment idle time and improving equipment utilization.

[0053] Furthermore, the waiting status of the adjacent workstations is determined. The specific determination process is as follows: The waiting quantity of process tasks at the second workstation is collected, where the waiting quantity of process tasks can be specifically extracted from the monitoring report of the production line. If the waiting quantity of process tasks at the second workstation is not zero, it is determined that the first workstation does not need to wait, and the jump instruction based on the PLC controls the first workstation to put the current workpiece into the process task waiting queue of the second workstation to wait for execution. The waiting quantity of process tasks at the second workstation is extracted, and the process execution adaptation rate of the second workstation is matched to configure the next process execution rate of the second workstation.

[0054] The above matching obtains the process execution adaptation rate of the second workstation, specifically, matching the process task waiting amount of the second workstation with the process execution adaptation rate corresponding to the predefined process task waiting amount interval, determining the specific interval of the process task waiting amount of the second workstation, and allocating the process execution adaptation rate corresponding to the interval to the second workstation to obtain the process execution adaptation rate of the second workstation.

[0055] If the waiting amount of the process task at the second workstation is zero, the equipment execution data of the second workstation is collected, the equipment execution stability index of the second workstation is determined, the process duration correction factor of the second workstation is matched, the default process execution time of the second workstation is extracted, and data is coupled with the process duration correction factor of the second workstation to obtain the corrected process execution time of the second workstation, and the current process execution time of the second workstation is collected, where the current process execution time and the default process execution time can be extracted from the execution log of the second workstation. The corrected process execution time of the second workstation is subtracted from the current process execution time of the second workstation to obtain the remaining process execution time of the second workstation, and the difference is performed with the remaining process execution time of the first workstation to obtain the process waiting deviation of the adjacent workstation, and the waiting status of the adjacent workstation is continuously determined.

[0056] The equipment execution data of the second workstation, including the speed following error, the equipment acceleration fluctuation rate, and the current harmonic distortion rate of the second workstation, are normalized to obtain normalized results. The normalized results are weighted and aggregated in turn to obtain the equipment execution stability index of the second workstation. The specific analysis method is as follows:

[0057] Where, Execute stability indicators for the equipment at the second station, is the speed following error of the second station, is the acceleration fluctuation rate of the equipment at the second station, is the current harmonic distortion rate of the second station, The weight parameter corresponding to the speed following error predefined in the timing adjustment management library, The weight parameter corresponding to the acceleration fluctuation rate predefined in the timing adjustment management library, It is the weight parameter corresponding to the current harmonic distortion rate predefined in the timing adjustment management library.

[0058] The above matching obtains the process duration correction factor of the second workstation, specifically, matching the equipment execution stability index of the second workstation with the process duration correction factor corresponding to the predefined equipment execution stability index interval of each second workstation, determining the specific interval of the equipment execution stability index of the second workstation, and assigning the process duration correction factor corresponding to the interval to the second workstation to obtain the process duration correction factor of the second workstation.

[0059] By collecting and analyzing the waiting time for process tasks at the second workstation in real time, it is possible to promptly determine whether adjacent workstations need to wait, reducing unnecessary waiting time caused by information lag. When a process task is waiting at the second workstation, the first workstation does not need to wait and can directly place the current workpiece in the waiting queue of the second workstation, ensuring the continuity of the production process. Based on the equipment execution stability index and the waiting time for process tasks at the second workstation, the production rhythm is dynamically adjusted to adapt to changes in different production tasks and equipment status. When there is no waiting time for process tasks at the second workstation, the deviation of the process waiting time at adjacent workstations is determined to rationally arrange the process execution rates of the first and second workstations, reducing equipment idle time.

[0060] Specifically, the waiting status of adjacent workstations is continuously determined. The specific determination process is as follows: The process waiting deviation of the adjacent workstation is compared with the predefined process waiting permission deviation. If the process waiting deviation of the adjacent workstation is less than or equal to the process waiting permission deviation, it is determined that the adjacent workstation needs to wait.

[0061] The above determination of whether adjacent workstations need to wait is specifically when the process waiting deviation of the adjacent workstation is a negative value, that is, the remaining execution time of the process at the second workstation is less than the remaining execution time of the process at the first workstation, then the second workstation is determined to be waiting. When the process waiting deviation of the adjacent workstation is a positive value, that is, the remaining execution time of the process at the second workstation is greater than the remaining execution time of the process at the first workstation, then the first workstation is determined to be waiting. When the process waiting deviation of the adjacent workstation is zero, that is, the remaining execution time of the process at the second workstation is equal to the remaining execution time of the process at the first workstation, then the first and second workstations are directly executed alternately without waiting.

[0062] If the process waiting deviation of the adjacent workstations is less than the process waiting definition deviation, then the process execution rate correction value of the first workstation is matched according to the process waiting deviation of the adjacent workstations, the real-time process execution rate of the first workstation is collected, and the process execution adaptation rate of the first workstation is obtained by adding it to the process execution rate correction value of the first workstation, which is used to configure the next process execution rate of the first workstation.

[0063] When the process waiting deviation of the adjacent workstations is greater than the process waiting permission deviation, it is determined that the first workstation does not need to wait. The jump instruction based on the PLC controls the first workstation to put the current workpiece into the process task waiting queue of the second workstation to wait for execution. At the same time, according to the process waiting deviation of the adjacent workstations, the process execution rate correction amount of the second workstation is matched and the real-time process execution rate of the second workstation is collected. The real-time process execution rate can be extracted from the execution log of the second workstation and added to the process execution rate correction amount of the second workstation to obtain the process execution adaptation rate of the second workstation, which is used to configure the next process execution rate of the second workstation.

[0064] The above matching obtains the process execution rate correction amount of the second workstation, specifically, matching the process waiting deviation of the adjacent workstation with the process execution rate correction amount corresponding to each predefined process waiting deviation interval, determining the specific interval of the process waiting deviation of the adjacent workstation, and allocating the process execution rate correction amount corresponding to the interval to the second workstation to obtain the process execution rate correction amount of the second workstation.

[0065] By comparing the process waiting deviation of adjacent workstations with the predefined permissible deviation, it accurately determines whether adjacent workstations require a waiting period, reducing production delays caused by inaccurate information. When the process waiting deviation of adjacent workstations is within the permissible range, it is determined that no waiting is required and the process is directly executed alternately, improving production efficiency. Based on the process waiting deviation of adjacent workstations, the process execution rate of the first or second workstation is dynamically adjusted, making the production process more flexible. It can quickly respond to changes in the production process, such as equipment status and workpiece quality, to timely adjust the production rhythm and minimize production interruptions. By rationally adjusting the process execution rate, equipment idle time is reduced and equipment operation is ensured to be in optimal condition.

[0066] Furthermore, the first station is stabilized and repaired. The specific repair process is as follows: When the stable duration of the first workstation is continuously less than the stable duration adaptation time, the equipment stable repair of the first workstation is started. The specific repair process is: subtract the stable duration adaptation time from the stable duration of the first workstation to obtain the stable duration deviation of the first workstation, match it to obtain the shock absorber damping force adaptation value, and adjust the initial value of the shock absorber damping force to the adaptation value of the shock absorber damping force.

[0067] The above matching obtains the shock absorber damping force adaptation value, specifically, matching the stable duration deviation of the first workstation with the shock absorber damping force adaptation value corresponding to each predefined stable duration deviation interval, determining the specific interval of the stable duration deviation of the first workstation, and obtaining the shock absorber damping force adaptation value corresponding to the interval.

[0068] Based on the PLC input and output interface, the workpiece data of the first station during the process completion period is extracted, the workpiece quality index of the first station is determined, and based on the conditional judgment instruction of the PLC, it is determined whether the equipment should be repaired again.

[0069] The workpiece data of the above-mentioned first station during the process completion period include the molecular uniform orientation degree of the workpiece at the first station, the dielectric constant of the workpiece at the first station, and the ultrasonic attenuation coefficient of the workpiece at the first station, among which the molecular orientation degree can be obtained through ultrasonic anisotropy analysis, the dielectric constant can be monitored by a high-frequency dielectric analyzer, and the ultrasonic attenuation coefficient can be monitored by a pulse reflection ultrasonic flaw detector.

[0070] The dielectric reference constant is extracted from the timing adjustment management library. The molecular uniform orientation degree of the workpiece at the first station, the dielectric constant of the workpiece at the first station, and the ultrasonic attenuation coefficient of the workpiece at the first station are normalized to obtain normalized results. The normalized results are weighted and aggregated in turn to obtain the workpiece quality index of the first station. The specific analysis method is as follows:

[0071] Where, is the workpiece quality index of the first station, is the molecular uniform orientation degree of the workpiece at the first station, is the dielectric constant of the workpiece at the first station, is the dielectric reference constant, is the ultrasonic attenuation coefficient of the workpiece at the first station, The weight parameter corresponding to the uniform orientation of molecules predefined in the timing adjustment management library is The weight parameter corresponding to the dielectric constant predefined in the timing adjustment management library, The weight parameter corresponding to the ultrasonic attenuation coefficient predefined in the timing adjustment management library.

[0072] It needs to be explained that the above-mentioned uniform molecular orientation refers to the uniformity of the spatial arrangement of molecular chains inside the workpiece; the dielectric constant is a physical quantity used to measure the degree of polarization of a substance, reflecting the ability of the workpiece material to store electrical energy in an electric field; the ultrasonic attenuation coefficient refers to the degree to which the energy of ultrasonic waves is attenuated due to absorption, scattering, etc. when propagating inside the workpiece, and is closely related to the microstructure and defects of the material.

[0073] The weight parameters corresponding to the molecular uniform orientation degree, the weight parameters corresponding to the dielectric constant, and the weight parameters corresponding to the ultrasonic attenuation coefficient are all extracted from the timing adjustment management library, and the mapping relationship can be a one-to-one correspondence or a many-to-one relationship. For example, the molecular uniform orientation degree, the dielectric constant, and the ultrasonic attenuation coefficient respectively form a mapping set with the weight parameters corresponding to the molecular uniform orientation degree, the weight parameters corresponding to the dielectric constant, and the weight parameters corresponding to the ultrasonic attenuation coefficient preset in the timing adjustment management library. The real-time molecular uniform orientation degree, dielectric constant, and ultrasonic attenuation coefficient are brought into the mapping set to obtain the weight parameters corresponding to the molecular uniform orientation degree, the weight parameters corresponding to the dielectric constant, and the weight parameters corresponding to the ultrasonic attenuation coefficient.

[0074] In this example, a multivariate analysis of molecular uniformity, dielectric constant, and ultrasonic attenuation coefficient was conducted, specifically considering the correlation between these parameters. A higher molecular uniformity means more molecules are aligned along the electric field direction, resulting in a greater degree of orientation polarization and, within a certain range, a higher dielectric constant. This results in higher workpiece quality at the first station. Furthermore, molecular uniformity also affects the ultrasonic attenuation coefficient, with a higher molecular uniformity reducing the ultrasonic attenuation coefficient. This is because the uniform orientation of the molecular chains reduces the scattering and reflection of ultrasonic waves during propagation, which also reflects the higher quality of the workpiece at the first station.

[0075] If the stability duration of the first workstation is consistently less than the adaptation duration, the stabilization repair program is immediately initiated, quickly restoring the equipment's stability by adjusting the shock absorber damping force. By matching the stability duration deviation with a predefined range, the shock absorber damping force adaptation value is precisely adjusted to ensure optimal equipment operation. Through real-time monitoring and feedback, product quality issues caused by equipment instability are reduced, improving product consistency and pass rates. Promptly repairing equipment instability reduces production interruptions and improves overall production efficiency. Based on the workpiece quality index, the repair strategy is dynamically adjusted to avoid over- or under-repair and optimize production time.

[0076] Specifically, the process of determining whether to repair the equipment is as follows: The workpiece quality index of the first station is compared with the workpiece quality reference index. If the workpiece quality index of the first station is greater than or equal to the workpiece quality reference index, it is determined that there is no need to correct the equipment stability repair, and the first station will put the current workpiece to the second station.

[0077] If the workpiece quality index of the first workstation is less than the workpiece quality reference index, the workpiece quality index of the first workstation is proportionally processed with the workpiece quality reference index to obtain the proportion of the workpiece quality index of the first workstation, and the shock absorber damping force adjustment factor is matched to obtain the shock absorber damping force adjustment factor. The shock absorber damping force adaptation value and the shock absorber damping force adjustment factor are data coupled. Specifically, the shock absorber damping force adaptation value is multiplied by the shock absorber damping force adjustment factor to obtain the shock absorber damping force correction value, which is used to reconfigure the equipment shock absorber of the first workstation.

[0078] The above-mentioned proportion processing specifically performs difference processing on the workpiece quality index of the first station and the workpiece quality reference index to obtain the workpiece quality index deviation of the first station, and performs ratio processing on it with the workpiece quality reference index to obtain the proportion of the workpiece quality index of the first station.

[0079] The above matching obtains the shock absorber damping force adjustment factor, specifically, matching the workpiece quality index ratio of the first workstation with the shock absorber damping force adjustment factor corresponding to the predefined workpiece quality index ratio interval, determining the specific interval of the workpiece quality index ratio of the first workstation, and obtaining the shock absorber damping force adjustment factor corresponding to the interval.

[0080] When the workpiece quality index reaches or exceeds the reference index, no further repair is determined, reducing unnecessary resource waste and improving production efficiency. When the workpiece quality index falls below the reference index, the damping force adjustment factor is calculated by calculating the workpiece quality index ratio and matching it to fine-tune the damping force, helping to improve workpiece quality in a targeted manner. Based on real-time feedback on workpiece quality, the damping force is dynamically adjusted to optimize the equipment's operating status, thereby improving overall production quality. Timely and accurate repair decisions reduce equipment downtime awaiting repairs and increase equipment utilization.

[0081] It should be explained that the embodiment of the present invention also includes a PLC feedback correction module, specifically: The equipment execution stability index of the first station and the workpiece quality index of the first station are weighted and aggregated to obtain the process execution effectiveness of the first station, which is then verified with the predefined process execution adaptation effectiveness: If the process execution effectiveness of the first workstation is greater than or equal to the process execution adaptation effectiveness, a pre-start signal is sent in advance to the equipment at the second workstation according to the preset standard signal sending speed and preset standard signal control strength of the PLC.

[0082] If the process execution effectiveness of the first workstation is less than the process execution adaptation effectiveness, the process execution effectiveness of the first workstation is matched with the signal sending speed adjustment amount corresponding to each predefined process execution effectiveness interval, and the specific interval of the process execution effectiveness of the first workstation is determined to obtain the signal sending speed adjustment amount corresponding to the interval, and the standard signal sending speed is subtracted from the signal sending speed adjustment amount, which is used for the PLC to send a signal to slow down the execution rate to the second workstation; at the same time, the process execution effectiveness of the first workstation is differenced with the process execution adaptation effectiveness to obtain the process execution effectiveness deviation of the first workstation, and matched with the signal control strength compensation amount corresponding to each predefined process execution effectiveness deviation interval, and the specific interval of the process execution effectiveness deviation of the first workstation is determined to obtain the signal control strength compensation amount corresponding to the interval, and the standard signal control strength is added to the signal control strength compensation amount, which is used for the PLC to correct the control signal of the second workstation in real time, thereby improving the control accuracy of the PLC over the second workstation.

[0083] The specific analysis method for the effectiveness of the process execution of the first station is as follows:

[0084] Where, The effectiveness of the process execution of the first station, Execute stability indicators for the equipment at the first station, is the workpiece quality index of the first station, The weight parameters corresponding to the device execution stability indicators predefined in the timing adjustment management library are The weight parameter corresponding to the workpiece quality index predefined in the timing adjustment management library.

[0085] It should be explained that the PLC feedback correction module can adjust the signal control of the second station in real time according to the effectiveness of the process execution of the first station, so that the production system can quickly adapt to various changes in the production process, such as fluctuations in equipment status. In addition, through real-time monitoring and feedback, the PLC can intelligently optimize the production process, reduce production problems caused by unreasonable parameter settings, and improve production flexibility and adaptability. When the process execution effectiveness of the first station is high, the PLC can send a pre-start signal to the second station in advance, reducing the waiting time of the second station, making the production process more compact, and improving overall production efficiency. The PLC feedback correction module ensures that the equipment at the second station operates in the optimal state by correcting the control signal in real time, improving the accuracy and stability of the production process, and thus improving product quality. In addition, the PLC feedback correction module forms a closed-loop control by monitoring the effectiveness of the process execution of the first station in real time, ensuring the stability of the production process and the consistency of product quality.

[0086] Reference Figure 2 As shown, the second aspect of the present invention provides a method for adjusting the timing of adjacent workstations based on PLC, including: accessing the sequential control of adjacent workstations through the shift register of the PLC, and marking the adjacent workstations in sequence as the first workstation and the second workstation.

[0087] During the first stability evaluation period, based on the PLC input and output interface, the equipment operation data of the first workstation is collected in real time to evaluate the equipment execution stability index of the first workstation.

[0088] According to the equipment execution stability index of the first workstation and based on the PLC timer, the stability duration of the first workstation is extracted to determine whether the first workstation is in a stable state.

[0089] When the first workstation is in a stable state, the PLC is used to adjust the timing of the adjacent workstations. When the first workstation is in an unstable state, the PLC is used to stabilize and repair the first workstation.

[0090] The third aspect of the present invention provides an electronic device, characterized in that the electronic device includes a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device is triggered to execute a PLC-based adjacent workstation timing adjustment system.

[0091] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the present invention, they should all fall within the scope of protection of the present invention.

Claims

1. A PLC-based adjacent workstation timing adjustment system, characterized in that: include: The adjacent workstation access module is used to access the sequential control of the adjacent workstations through the shift register of the PLC, and mark the adjacent workstations as the first workstation and the second workstation in sequence; A stability index evaluation module is used to collect equipment operation data of the first workstation in real time based on the PLC input and output interface during a first stability evaluation period, and evaluate the equipment execution stability index of the first workstation; a stable state determination module, configured to extract the stability duration of the first workstation based on the stability index of the equipment at the first workstation and a PLC timer, and determine whether the first workstation is in a stable state; The adjacent workstation adjustment module is used to adjust the timing of the adjacent workstations through PLC when the first workstation is in a stable state, and to stabilize and repair the first workstation through PLC when the first workstation is in an unstable state.

2. The PLC-based adjacent workstation timing adjustment system according to claim 1, characterized in that: The specific process of determining whether the first station is in a stable state is as follows: The equipment execution stability index of the first workstation is extracted in real time and verified with the predefined stability interval. The timer collects the stability duration of the equipment execution stability index of the first workstation within the stability interval during the first stability evaluation period, and records it as the stability duration of the first workstation; Compare the stable duration of the first workstation with the predefined stable continuous adaptation duration. If the stable duration of the first workstation is greater than or equal to the stable continuous adaptation duration, it is determined that the first workstation is in a stable state, and the timing of the second workstation is adjusted. If the stable duration of the first workstation is less than the stable continuous adaptation duration, it is determined that the first workstation is not in a stable state, and the first workstation is stabilized and repaired.

3. The PLC-based adjacent workstation timing adjustment system according to claim 1, characterized in that: The timing adjustment of adjacent workstations is carried out as follows: Extracting the execution status of the second workstation, where the execution status includes an idle state and a busy state; When the execution status of the second workstation is in an idle state, the current execution time of the process of the first workstation is collected, and the difference between the preset default completion time of the process of the first workstation and the current execution time of the process of the first workstation is processed to obtain the remaining execution time of the process of the first workstation, and the start waiting time of the second workstation is obtained by matching. That is, after the start waiting time, the second workstation is controlled to start automatically based on the jump instruction of the PLC to take over the process task of the first workstation. At the same time, the remaining execution time of the process of the first workstation and the start waiting time of the second workstation are processed to obtain the collaborative time deviation of the adjacent workstations, and the process execution rate correction of the first workstation is obtained by matching. The real-time process execution rate of the first workstation is collected and added to the process execution rate correction of the first workstation to obtain the process execution adaptation rate of the first workstation, which is used to configure the execution rate of the next process task of the first workstation; When the execution status of the second workstation is in a busy state, the waiting state of the adjacent workstation is determined.

4. The PLC-based adjacent workstation timing adjustment system according to claim 3, characterized in that: The specific determination process of the waiting status of adjacent workstations is as follows: The waiting amount of the process tasks of the second station is collected. If the waiting amount of the process tasks of the second station is not zero, it is determined that the first station does not need to wait. Based on the jump instruction of the PLC, the first station is controlled to put the current workpiece into the process task waiting queue of the second station for execution. The waiting amount of the process tasks of the second station is extracted and matched to obtain the process execution adaptation rate of the second station, which is used to configure the next process execution rate of the second station; If the waiting amount of the process task of the second workstation is zero, the equipment execution data of the second workstation is collected, the equipment execution stability index of the second workstation is determined, the process duration correction factor of the second workstation is matched, the default process execution time of the second workstation is extracted, and data is coupled with the process duration correction factor of the second workstation to obtain the corrected process execution time of the second workstation, the current process execution time of the second workstation is collected, the corrected process execution time of the second workstation is subtracted from the current process execution time of the second workstation to obtain the remaining process execution time of the second workstation, and the difference is performed with the remaining process execution time of the first workstation to obtain the process waiting deviation of the adjacent workstation, and the waiting status of the adjacent workstation is continuously determined; The equipment execution data of the second workstation, including the speed following error of the second workstation, the acceleration fluctuation rate of the second workstation, and the current harmonic distortion rate of the second workstation, are normalized to obtain normalized results. The normalized results are weighted and aggregated in turn to obtain the equipment execution stability index of the second workstation.

5. The PLC-based adjacent workstation timing adjustment system according to claim 4, characterized in that: The specific determination process of continuously determining the waiting status of adjacent workstations is as follows: Compare the process waiting deviation of the adjacent workstation with the predefined process waiting tolerance. If the process waiting deviation of the adjacent workstation is less than or equal to the process waiting tolerance, it is determined that the adjacent workstation needs to wait. When the process waiting deviation of the adjacent workstations is greater than the process waiting permission deviation, it is determined that the first workstation does not need to wait. The jump instruction based on the PLC controls the first workstation to put the current workpiece into the process task waiting queue of the second workstation to wait for execution. At the same time, according to the process waiting deviation of the adjacent workstations, the process execution rate correction of the second workstation is matched, the real-time process execution rate of the second workstation is collected, and added to the process execution rate correction of the second workstation to obtain the process execution adaptation rate of the second workstation, which is used to configure the next process execution rate of the second workstation.

6. The PLC-based adjacent workstation timing adjustment system according to claim 1, characterized in that: The first station is stabilized and repaired, and the specific repair process is as follows: When the stability duration of the first station is continuously less than the stability duration adaptation duration, the equipment stability repair of the first station is started. The specific repair process is: subtract the stability duration adaptation duration from the stability duration of the first station to obtain the stability duration deviation of the first station, match it to obtain the shock absorber damping force adaptation value, and adjust the initial value of the shock absorber damping force to the shock absorber damping force adaptation value; Based on the PLC input and output interface, the workpiece data of the first station during the process completion period is extracted, the workpiece quality index of the first station is determined, and based on the conditional judgment instruction of the PLC, it is determined whether the equipment should be repaired; The workpiece data of the first station during the process completion period includes the molecular uniform orientation degree of the workpiece at the first station, the dielectric constant of the workpiece at the first station, and the ultrasonic attenuation coefficient of the workpiece at the first station; Extracting a dielectric reference constant from a timing adjustment management library; The molecular uniform orientation degree, dielectric constant and ultrasonic attenuation coefficient of the workpiece at the first station are normalized respectively to obtain normalized results, and the normalized results are weighted aggregated in turn to obtain the workpiece quality index of the first station.

7. The PLC-based adjacent workstation timing adjustment system according to claim 6, characterized in that: The specific process of determining whether to repair the equipment is as follows: Compare the workpiece quality index of the first station with the workpiece quality reference index. If the workpiece quality index of the first station is greater than or equal to the workpiece quality reference index, it is determined that no correction is needed for the equipment stability repair, and the first station puts the current workpiece to the second station. If the workpiece quality index of the first workstation is less than the workpiece quality reference index, the workpiece quality index of the first workstation is proportionally processed with the workpiece quality reference index to obtain the proportion of the workpiece quality index of the first workstation, and the shock absorber damping force adjustment factor is matched to obtain the shock absorber damping force correction value. The shock absorber damping force adaptation value and the shock absorber damping force adjustment factor are data-coupled to obtain the shock absorber damping force correction value, which is used to reconfigure the equipment shock absorber of the first workstation.

8. The PLC-based adjacent workstation timing adjustment system according to claim 1, characterized in that: It also includes a PLC feedback correction module, specifically: The equipment execution stability index of the first station and the workpiece quality index of the first station are weighted and aggregated to obtain the process execution effectiveness of the first station, which is then verified with the predefined process execution adaptation effectiveness: If the process execution effectiveness of the first station is greater than or equal to the process execution adaptation effectiveness, a pre-start signal is sent in advance to the equipment at the second station according to the preset standard signal sending speed and preset standard signal control strength of the PLC; If the process execution effectiveness of the first workstation is less than the process execution adaptation effectiveness, the process execution effectiveness of the first workstation is matched with the signal sending speed adjustment amount corresponding to each predefined process execution effectiveness interval, and the specific interval of the process execution effectiveness of the first workstation is determined to obtain the signal sending speed adjustment amount corresponding to the interval, and the standard signal sending speed is subtracted from the signal sending speed adjustment amount, so as to be used by the PLC to send a signal to slow down the execution rate to the second workstation; at the same time, the process execution effectiveness of the first workstation is differenced with the process execution adaptation effectiveness to obtain the process execution effectiveness deviation of the first workstation, and matched with the signal control strength compensation amount corresponding to each predefined process execution effectiveness deviation interval, and the specific interval of the process execution effectiveness deviation of the first workstation is determined to obtain the signal control strength compensation amount corresponding to the interval, and the standard signal control strength is added to the signal control strength compensation amount, so as to be used by the PLC to correct the control signal to the second workstation in real time.

9. A method for the PLC-based adjacent workstation timing adjustment system according to any one of claims 1 to 8, characterized in that: include: The sequential control of adjacent workstations is accessed through the PLC shift register, and the adjacent workstations are marked as the first and second workstations in sequence; During the first stability evaluation period, based on the PLC input and output interface, the equipment operation data of the first workstation is collected in real time to evaluate the equipment execution stability index of the first workstation; According to the equipment execution stability index of the first workstation and based on the PLC timer, the stability duration of the first workstation is extracted to determine whether the first workstation is in a stable state; When the first workstation is in a stable state, the PLC is used to adjust the timing of the adjacent workstations. When the first workstation is in an unstable state, the PLC is used to stabilize and repair the first workstation.

10. An electronic device, characterized in that: The electronic device comprises a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device is triggered to execute the system according to any one of claims 1 to 8.

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