Cross-line automatic transfer method in workshop

Abstract

The application discloses a workshop cross-line automatic transfer method, a production line is provided with a plurality of workpiece taking and placing points, photoelectric switch sensors are arranged at the workpiece taking and placing points, parking spaces are arranged on one side of the workpiece taking and placing points, magnetic stripe navigation lines are arranged between the parking spaces, and the magnetic stripe navigation lines are matched with a plurality of AGV trolleys, the application integrates a plurality of production lines for the same cooperation and scheduling, thereby improving the utilization rate of the AGV trolleys, reducing the total number of the AGV trolleys and lowering the production cost, the application further predicts the completion time of the workpiece taking and placing points in advance, schedules the AGV trolleys in advance, improves the transfer efficiency, avoids the congestion of the trolleys when the work is busy, disperses the unified parking spaces, and makes the AGV trolleys parked in the parking spaces according to the predicted signals in idle time, thereby shortening the route of the AGV trolleys, improving the energy utilization rate and lowering the production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transfer method, in particular to a workshop cross-line automatic transfer method. BACKGROUND

[0002] Under the complex and changeable industry dynamics of the manufacturing market, the comprehensive implementation of lean production, the transformation of manufacturing industry to digital production, informationization, automation and intelligence has become a future development trend. The existing manual distribution mode under the current manufacturing system is gradually not suitable for lean production. Reducing labor costs and improving automation rate have become the urgent needs of manufacturing industry. The existing AGV car is usually independently prepared for multiple AGV cars on a single production line, which causes more idle time of AGV car, waste of resources, further increase of production cost, in addition, the existing AGV car is usually parked in idle time, generally parked on one side of the production line, when the task is assigned, the AGV car starts from the parking space to execute the task, which reduces the execution efficiency of the AGV car, further improves the working energy consumption of the AGV car, and further causes the congestion of the car, which causes the stagnation of material distribution. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a workshop cross-line automatic transfer method to solve at least one of the above technical problems.

[0004] The technical solution of the present application to solve the above technical problems is as follows: a workshop cross-line automatic transfer method, comprising a plurality of production lines, photoelectric switch sensors, a material management system, a scheduling system, a charging system and AGV cars, the production line is provided with a plurality of workpiece taking and placing points, the photoelectric switch sensor is arranged at the workpiece taking and placing point, one side of the workpiece taking and placing point is provided with a parking space, a magnetic stripe navigation line is arranged between a plurality of parking spaces, the magnetic stripe navigation line is matched with a plurality of AGV cars, the scheduling system is connected with the material management system, the intelligent charging system and the AGV car through signals, and a plurality of photoelectric switch sensors are connected with the material management system through signals.

[0005] Workshop cross-line automatic transfer steps:

[0006] s1: the workpiece taking and placing point has materials, the photoelectric switch sensor senses the signal and transmits the signal to the material management system;

[0007] s2: the material management system transmits the signal to the scheduling system;

[0008] s3: the scheduling system receives the signal, and the scheduling system transmits the taking signal to the AGV car;

[0009] s4: the AGV car moves to the parking space corresponding to the workpiece taking and placing point to take down the materials and place them into the warehouse.

[0010] Further, the execution step of a prediction signal is included:

[0011] s1: The scheduling system collects data of each pick-and-place workpiece point, and predicts the next pick-and-place workpiece point through the average pick-up time interval of the pick-and-place workpiece point;

[0012] s2: The scheduling system sends the prediction signal to the idle AGV;

[0013] s3: The idle AGV moves to the parking space corresponding to the predicted pick-and-place workpiece point and parks to wait;

[0014] s4: The pick-and-place workpiece point sends a signal to the material management system through the material photoelectric switch sensor;

[0015] s5: The material management system sends a pick-up signal to the scheduling system;

[0016] s6: The scheduling system dispatches the AGV of the parking space corresponding to the pick-and-place workpiece point to transport materials, and completes the task.

[0017] Further, the prediction signal is sorted according to the predicted pick-up time sequence, and the priority is arranged according to the pick-up time signal, and the shorter the execution time of the prediction signal, the higher the priority.

[0018] Further, when the material management system sends a signal to the scheduling system, the scheduling system detects the pick-up signal and there is no AGV in the work station, the scheduling system sends the pick-up signal to the AGV executing the prediction signal instruction to pick up the goods, and the AGV executing the prediction signal instruction is invalid, and the scheduling system re-issues the prediction signal to the subsequent idle AGV.

[0019] Further, the AGV sends an electric quantity signal to the scheduling system, and when the scheduling system detects that the AGV electric quantity is lower than the safety threshold, the scheduling system sends a charging signal to the AGV to execute the charging command, and the previous pick-up signal instruction and prediction signal instruction are invalid, the scheduling system sends a signal to the intelligent charging system, the intelligent charging system feedbacks an idle charging pile, and the AGV moves to the charging pile and charges.

[0020] Further, the scheduling system collects the power consumption per unit distance, calculates the average power per unit distance, and according to the distance of the pick-up and storage, the electric quantity of the AGV after completing the task can be sufficient to move to the charging pile when the execution command is issued.

[0021] Further, the material management system is connected with the warehouse signal, and can transmit the vacancy of each type of workpiece in the warehouse to the scheduling system, the scheduling system sends a vacancy signal to the AGV, and the AGV puts the material into the vacancy corresponding to the workpiece type.

[0022] The beneficial effects of the present application are:

[0023] The present application improves the utilization rate of AGV trolley, reduces the total number of AGV trolleys, and reduces the production cost by setting the integrated same cooperation scheduling of multiple production lines. The present application also improves the transfer efficiency by predicting the completion time of the workpiece pickup and placement point in advance, scheduling AGV trolleys in advance, avoiding the trolley congestion situation when the work is busy, dispersing the unified parking space, and parking the AGV trolley according to the prediction signal during the idle time, shortening the route of the AGV trolley, improving the energy utilization rate, and reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 The present application is a parking space and workpiece pickup and placement point planning schematic diagram.

[0025] Fig. 2 The present application is a structure signal transmission schematic diagram. DETAILED DESCRIPTION

[0026] The present application will be further described below in conjunction with specific embodiments, which should be understood as merely illustrating the present application and not limiting the scope of the present application. In addition, it should be understood that after reading the content taught by the present application, those skilled in the art can make various modifications or modifications to the present application, and these equivalent forms also fall within the scope defined by the appended claims.

[0027] Example one: see Figs. 1-2The present application is a schematic diagram, including several production lines, photoelectric switch sensors, material management systems, scheduling systems, charging systems, AGV trolleys, the production line is provided with several workpiece taking and placing points, the photoelectric switch sensor is arranged at the workpiece taking and placing point, and the photoelectric switch sensor senses the workpiece and sends a signal when the workpiece taking and placing point is placed with the finished workpiece. One side of the workpiece taking and placing point is provided with a parking space, the parking space is used for parking the trolley, a magnetic stripe navigation line is arranged between the several parking spaces, the magnetic stripe navigation line is matched with the several AGV trolleys, the scheduling system is connected with the material management system, the intelligent charging system and the AGV trolley through a signal, most of the photoelectric switch sensors are connected with the material management system through a signal, after the scheduling system receives the task information from the material management system, the most suitable AGV trolley is assigned to execute the task according to the task demand, the AGV load condition, the AGV idle condition, the distance from the trolley to the task point and whether there is electricity, instead of one trolley to one station, so as to avoid the material distribution stagnation caused by the AGV trolley fault, after the AGV trolley for executing the task is selected, the scheduling system plans the optimal path for the AGV according to the task demand, the workpiece taking point, the workpiece placing point and the real-time position of the selected AGV, the corresponding route is sent to the corresponding AGV trolley, and the condition of the AGV trolley operation and the control of the intersection vehicle are supervised at any time, so that the trolley can quickly complete the task;

[0028] Cross-line automatic transfer steps in the workshop:

[0029] s1: the workpiece taking and placing point exists material, the photoelectric switch sensor senses the signal and transmits the signal to the material management system;

[0030] s2: the material management system transmits the signal to the scheduling system;

[0031] s3: the scheduling system accepts the signal, the scheduling system plans the path, and the scheduling system transmits the taking signal to the corresponding AGV trolley;

[0032] s4: the AGV trolley moves to the parking space corresponding to the workpiece taking and placing point to take down the material and place it into the warehouse.

[0033] Specifically, it includes an execution step of predicting a signal:

[0034] s1: the scheduling system collects the data of each workpiece taking and placing point, and predicts the next workpiece taking and placing point through the average taking time interval of the workpiece taking and placing point;

[0035] s2: the scheduling system transmits the prediction signal to the idle AGV trolley;

[0036] s3: the idle AGV trolley moves to the parking space corresponding to the predicted workpiece taking and placing point to park and wait;

[0037] s4: the workpiece picking and placing point exists material, and the photoelectric switch sensor transmits a signal to the material management system;

[0038] s5: the material management system transmits a picking signal to the scheduling system;

[0039] s6: the scheduling system schedules the AGV car of the parking space corresponding to the workpiece picking and placing point to transfer the material, and completes the task.

[0040] Specifically, the prediction signal is sorted according to the predicted picking time sequence, and the priority is arranged according to the picking time signal, and the priority of the prediction signal is higher when the execution time is shorter. When the AGV car has no task, it is parked in the corresponding parking space according to the priority of the prediction signal.

[0041] Specifically, when the material management system sends a signal to the scheduling system, the scheduling system detects the picking signal and there is no AGV car in the station, the scheduling system transmits the picking signal to the AGV car executing the prediction signal instruction to pick up the goods, and the car executing the prediction signal instruction is invalid, and the scheduling system reissues the prediction signal to the subsequent idle AGV car. When selecting an AGV car, the AGV car with the optimal route is selected according to the interval time and route of the AGV car prediction signal instruction, and the picking signal is always prior to the prediction signal.

[0042] Specifically, the AGV car transmits an electric quantity signal to the scheduling system, and when the scheduling system detects that the AGV car electric quantity is lower than the safety threshold, it transmits a charging signal to the AGV car to execute the charging command, and invalidates the previous picking signal instruction and prediction signal instruction. The scheduling system transmits a signal to the intelligent charging system, the intelligent charging system feeds back an idle charging pile, the AGV car moves to the charging pile and charges, and the priority of the charging signal is higher than that of the picking signal.

[0043] Specifically, the scheduling system collects the power consumption per unit distance, calculates the average power per unit distance, and according to the distance of picking and warehousing, the car has sufficient power to move to the charging pile after completing the task when issuing the execution command, avoiding the situation of AGV car paralysis.

[0044] Specifically, the material management system is connected with the warehouse signal, which can transmit the vacancy of each kind of workpiece in the warehouse to the scheduling system, and the scheduling system transmits the vacancy signal to the AGV car, and the AGV car puts the material into the corresponding vacancy of the workpiece type, realizing the function of classified warehousing of different kinds of workpieces.

[0045] In use of the present application, the scheduling system predicts the average completion time, sends a prediction signal to schedule the AGV car to the parking space corresponding to the workpiece pickup and placement point in advance, the production line corresponding to the workpiece pickup and placement point finishes processing a workpiece and places the workpiece on the workpiece pickup and placement point, the photoelectric switch sensor senses the presence of the workpiece on the workpiece pickup and placement point, the scheduling system sends a pickup signal to the AGV car on the parking space, the scheduling system selects the corresponding warehouse space according to the type of the workpiece and transmits it to the AGV car, the AGV car takes down the workpiece and places it on the corresponding space in the warehouse, after the task is completed, the scheduling system transmits the prediction signal of other workpiece pickup and placement points to the AGV car, and the AGV car goes to a new parking space to wait for parking.

[0046] In use of the present application, the scheduling system predicts the average completion time, sends a prediction signal to schedule the AGV car to the parking space corresponding to the workpiece pickup and placement point in advance, the production line corresponding to the workpiece pickup and placement point finishes processing a workpiece and places the workpiece on the workpiece pickup and placement point, the photoelectric switch sensor senses the presence of the workpiece on the workpiece pickup and placement point, the scheduling system sends a pickup signal to the AGV car on the parking space, the scheduling system selects the corresponding warehouse space according to the type of the workpiece and transmits it to the AGV car, the AGV car takes down the workpiece and places it on the corresponding space in the warehouse, after the task is completed, the scheduling system transmits the prediction signal of other workpiece pickup and placement points to the AGV car, and the AGV car goes to a new parking space to wait for parking.

[0047] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A workshop cross-line automated transfer method, comprising a plurality of production lines, photoelectric switch sensors, material management systems, dispatch systems, charging systems, AGV trolleys, characterized in that: The production line is provided with a plurality of workpiece taking and placing points, the photoelectric switch sensor is arranged at the workpiece taking and placing point, a parking space is arranged on one side of the workpiece taking and placing point, a magnetic stripe navigation line is arranged between a plurality of parking spaces, a plurality of AGV trolleys are arranged in cooperation with the magnetic stripe navigation line, the scheduling system is connected with the material management system, the intelligent charging system and the AGV trolley through signals, and most of the photoelectric switch sensors are connected with the material management system through signals; Cross-line automatic transfer steps in the workshop: S1: the photoelectric switch sensor senses the signal and transmits the signal to the material management system when the workpiece taking and placing point has materials; S2: the material management system transmits the signal to the scheduling system; S3: the scheduling system accepts the signal, and transmits the taking signal to the AGV trolley; S4: the AGV trolley moves to the parking space corresponding to the workpiece taking and placing point, takes down the materials and places them into the warehouse; The AGV trolley transmits the power signal to the scheduling system, and when the scheduling system detects that the AGV trolley power is lower than the safety threshold, the scheduling system transmits the charging signal to the AGV trolley to execute the charging command, and cancels the previous taking signal instruction and the predicted signal instruction, the scheduling system transmits the signal to the intelligent charging system, the intelligent charging system feeds back the idle charging pile, the AGV trolley moves to the charging pile and charges, the scheduling system collects the power consumption per unit distance, calculates the average power per unit distance, and according to the distance of taking and storing, the power of the trolley after completing the task can be sufficient to move to the charging pile when the execution command is issued; The execution steps of a prediction signal include: S1: the scheduling system collects data of each workpiece taking and placing point, and predicts the next workpiece taking and placing point according to the average taking time interval of the workpiece taking and placing point; S2: the scheduling system transmits the prediction signal to the idle AGV trolley; S3: the idle AGV trolley moves to the parking space corresponding to the predicted workpiece taking and placing point and stops to wait; S4: the photoelectric switch sensor transmits the signal to the material management system when the workpiece taking and placing point has materials; S5: the material management system transmits the taking signal to the scheduling system; S6: the scheduling system schedules the AGV trolley at the parking space corresponding to the workpiece taking and placing point to transfer the materials, and completes the task.

2. The method of claim 1, wherein: The prediction signal is sorted according to the predicted taking time sequence, and the priority is arranged according to the taking time signal, and the priority of the prediction signal is higher when the execution time is shorter.

3. The method of claim 2, wherein: When the material management system transmits the signal to the scheduling system, and the scheduling system detects the taking signal and there is no AGV trolley at the workpiece taking and placing point, the scheduling system transmits the taking signal to the AGV trolley executing the predicted signal instruction to take the goods, and the AGV trolley executing the predicted signal instruction is cancelled, and the scheduling system reissues the predicted signal to the subsequent idle AGV trolley.

4. The method of claim 1, wherein: The material management system is connected with the warehouse, and can transmit the vacancy of each type of workpiece in the warehouse to the scheduling system, the scheduling system transmits the vacancy signal to the AGV trolley, and the AGV trolley puts the materials into the vacancy corresponding to the workpiece type.

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