A Dynamic Regulation Management Method for STK OHCV

Abstract

The present invention relates to the technical field of automated conveying, and particularly to a dynamic adjustment management method for STK OHCV. When receiving the stop / start signal of the OHCV Port, the number of available OHCVs is counted; if there are two or more available OHCVs, it is determined whether the Ports in the InService state on the STK1 side are all in the same direction. If they are all in the same direction, the conveying direction of any one of the OHCV Ports is switched. If they are not all in the same direction, then the direction of the OHCV Port is not switched. The present invention solves the problem that when an OHCV fails or stops / starts, the conveying directions of multiple OHCVs are in the same direction, and the conveying production cannot continue automatically, realizes the function of dynamically adjusting the OHCV, so that the "carrier" can still be transmitted bidirectionally between STKs, greatly reducing the time cost, liberating more human resources, and improving the efficiency of production operations.

Description

Technical Field

[0001] The present invention relates to the technical field of automated conveying, and particularly to a dynamic adjustment management method for STK OHCV. Background Art

[0002] During the production process of FPD (Flat Panel Display), as Figure 1 shown, OHCV (Overhead Conveyor) is a suspended device between STKs (Clean Storage and Conveying Devices) in a cleanroom project, and is responsible for transporting glass panels from one STK to another. During the transportation process, one or several OHCVs often fail. When the remaining normally operating OHCVs have the same transmission direction, or only one OHCV can work, the conveying production cannot continue automatically. As Figure 2 shown, when there are three OHCVs in total, OHCV1 transports from the in - end of STK2 to the out - end of STK1, OHCV2 transports from the in - end of STK1 to the out - end of STK2, and OHCV3 transports from the in - end of STK2 to the out - end of STK1. If OHCV2 suddenly fails and stops, then the remaining two OHCVs, OHCV1 and OHCV3, are both in the direction from STK1 to STK2. At this time, the "carrier" loaded with materials can be transported to STK2 for production, but the empty "carrier" withdrawn from STK2 cannot be transported to STK1 and has to be temporarily stored in STK2. Finally, the empty "carrier" cannot be transported to STK1, MES cannot perform the material calling operation anymore, or STK2 is full of "carriers" due to too many accumulations and cannot perform the conveying production task anymore. When two OHCVs both fail and stop, in the case where only one OHCV can work, the automatic two - way conveying task cannot be continued, seriously affecting production efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a dynamic adjustment management method for STK OHCV, which aims to realize the function of dynamically adjusting OHCV when OHCV fails or stops and restarts, so that the "carrier" can still perform two - way transmission between two STKs.

[0004] To solve the above - mentioned technical problem, the technical solution of the present invention is: a dynamic adjustment management method for STK OHCV, characterized by including the following steps:

[0005] When receiving the stop / restart signal of the OHCV Port, count the number of available OHCVs;

[0006] If there are two or more available, check whether the Ports in the In Service state on the STK1 side are all in the same direction. If they are all in the same direction, switch the conveying direction of any one of the OHCV Ports. If they are not all in the same direction, then do not switch the direction of the OHCV Ports;

[0007] If there is only one available, switch the conveying direction of the OHCV Port at regular intervals.

[0008] As a preferred technical solution, the specific operation steps are as follows:

[0009] Step 1, when receiving the stop / restore signal of the OHCV Port, check how many OHCVs are in the Availability state, and count the OHCVs in the Availability state;

[0010] If the result of the count in Step 1 is greater than 1, it means that at least two OHCVs are in the Availability state. At this time, enter Step 2;

[0011] If the result of the count in Step 1 is equal to 1, it means that only one OHCV is in the Availability state. At this time, enter Step 6:

[0012] Step 2, perform a bitwise OR operation (logical OR operation is also acceptable) on all Port types (in type value is 1, out type value is 0) in the InService state on the STK1 side corresponding to all OHCVs in the Availability state;

[0013] A If the result of the operation in Step 2 is 0, it means that all Ports in the In Service state on the STK1 side corresponding to all OHCVs in the Availability state are in the same direction and are all out-type Ports, and the conveying direction is from STK1 to STK2. At this time, enter Step 3;

[0014] B If the result of the operation in Step 2 is 1, then perform a bitwise AND operation (logical AND operation is also acceptable) on all Port types in the In Service state on the STK1 side corresponding to all OHCVs in the Availability state;

[0015] 1) If the result of the operation is 1, it means that all Ports in the In Service state on the STK1 side corresponding to all OHCVs in the Availability state are also in the same direction and are all in-type Ports, and the conveying direction is from STK2 to STK1. At this time, enter Step 4;

[0016] 2) If the result of the operation is 0, it means there is no OHCV running in the same direction at this time, and then step five is entered.

[0017] Step three: Just set the type of any Port in the In Service state corresponding to the OHCV whose Availability state on the STK1 side is switched to in.

[0018] Step four: Just set the type of any Port in the In Service state corresponding to the OHCV whose Availability state on the STK1 side is switched to out.

[0019] Step five: Do not switch the direction of the OHCV Port.

[0020] Step six: Set the interval time M. The transportation direction of the OHCV Port is switched regularly every M minutes. For the transportation that cannot be carried out due to the incorrect transportation direction, the MCS will reject the transportation command request from the MES. Due to the retransmission mechanism of the MES, after M minutes, the MCS switches the direction of the OHCV Port. When the MES reissues the previous non - executable command again, at this time the MCS will receive this transportation command and perform the transportation task.

[0021] As a preferred technical solution, if the result of the statistical count in step one is equal to 1, it means there is only 1 OHCV in the Availability state. At this time, step six is not executed, but step seven is directly entered.

[0022] Step seven: Receive all the transportation commands from the MES and determine the directions of the transportation commands for STK1 and STK2. The determination method is as follows:

[0023] Check the commands whose origin device names are STK1 and STK2, and compare the number of origin names. If the number of origin device names STK1 is greater than STK2, then switch the type of the only In Service Port of STK1 to out, otherwise switch the type of the In Service Port to in.

[0024] During this period, the "wake-up transfer" function will attempt to transfer transfer tasks that can be transferred. After transferring a certain number of transfer tasks, each time an end signal of a transfer task is received, a count statistic is performed. Assuming the count statistic threshold is set to 10, when the count statistic value is greater than or equal to 10, the current command is used to find the corresponding job. If the job is found, wait until the next count of 11 is greater than 10, then use the current command to find the corresponding job. As long as the job is found, repeat the count statistic judgment in step a and the process of using the command to find the corresponding job until the job cannot be found, indicating that the job has been transferred;

[0025] Continue to return to step one, determine how many OHCVs are in the Availability state, and perform a statistical count on the OHCVs in the Availability state; if it is equal to 1, perform step seven again until all jobs have been transferred; if it is greater than 1, return to the normal mode of step two.

[0026] Due to the adoption of the above technical solution, when receiving the stop / start signal of the OHCV Port, the number of available OHCVs is counted; if there are 2 or more available, determine whether the Ports in the In Service state on the STK1 side are all in the same direction. If they are all in the same direction, switch the transfer direction of any one of the OHCV Ports. If they are not all in the same direction, then do not switch the direction of the OHCV Port; The beneficial effect of the present invention is: to solve the problem that when the OHCV fails or stops / starts, it causes the transfer directions of multiple OHCVs to be in the same direction and the transfer production cannot continue automatically, and to realize the function of dynamically adjusting the OHCV, so that the "carrier" can still perform two-way transmission between the STKs. Especially when only one OHCV can work, there is no need to adopt the original manual response method, which greatly reduces the time cost, liberates more human resources, and improves the efficiency of production operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following drawings are only intended to illustrate and explain the present invention and do not limit the scope of the present invention. Among them:

[0028] Figure 1 is a schematic diagram of the normal state of two-way working transmission of OHCV;

[0029] Figure 2 is a schematic diagram of one or two OHCVs transmitting in a single direction when the OHCV fails;

[0030] Figure 3 is a schematic diagram of two-way transmission after correcting the direction for fault one in Embodiment 1 of the present invention;

[0031] Figure 4 It is a schematic diagram of the only remaining OHCV transmission when a fault occurs in the OHCV;

[0032] Figure 5 It is a logic diagram of the solution steps for the second fault in the second embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of the overall architecture of the present invention. Detailed implementation manners

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. In the following detailed description, only some exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those of ordinary skill in the art can recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the accompanying drawings and description are illustrative in nature and are not used to limit the protection scope of the claims.

[0035] Figure 1 It is a schematic diagram of the normal state of the two-way working transmission of the OHCV. In the FPD production process, taking the example that three OHCVs jointly undertake the transportation task between STK1 and STK2 for illustration. Figure 1 It is a schematic diagram of the normal working state. The "carrier" to be transported is transported from the out end to the in end. Therefore, OHCV1 realizes the transportation from STK1 to STK2; OHCV2 realizes the transportation from STK2 to STK1. Similarly, OHCV3 realizes the transportation from STK1 to STK2, realizing the normal two-way transportation of the carrier.

[0036] When the OHCV suddenly fails and restarts, a dynamic adjustment management method for STK OHCV includes the following steps:

[0037] As Figure 6 shown, when receiving the stop / start signal of the OHCV Port, count the number of available OHCVs;

[0038] If there are 2 or more available, determine whether the Ports in the In Service state on the STK1 side are all in the same direction. If they are all in the same direction, switch the transportation direction of any one of the OHCV Ports. If they are not all in the same direction, then do not switch the direction of the OHCV Port;

[0039] If there is only 1 available, switch the transportation direction of the OHCV Port at regular intervals.

[0040] The specific operation steps are as follows:

[0041] Step 1: When receiving the start / stop signal of the OHCV Port, determine how many OHCVs are in the Availability state, and count the OHCVs in the Availability state;

[0042] If the result of the count in Step 1 is greater than 1, it means that at least two OHCVs are in the Availability state. In the case shown, Figure 2 proceed to Step 2;

[0043] If the result of the count in Step 1 is equal to 1, it means that only one OHCV is in the Availability state. In the case shown, Figure 4 proceed to Step 6:

[0044] Step 2: Perform a bitwise OR operation (logical OR operation is also acceptable) on all Ports of type InService on the STK1 side corresponding to all OHCVs in the Availability state (the in type value is 1, and the out type value is 0);

[0045] A If the result of the operation in Step 2 is 0, it means that all Ports of type In Service on the STK1 side corresponding to all OHCVs in the Availability state are in the same direction and are all Ports of type out. The transfer direction is from STK1 to STK2. Proceed to Step 3;

[0046] B If the result of the operation in Step 2 is 1, then perform a bitwise AND operation (logical AND operation is also acceptable) on all Ports of type InService on the STK1 side corresponding to all OHCVs in the Availability state;

[0047] 1) If the result of the operation is 1, it means that all Ports of type In Service on the STK1 side corresponding to all OHCVs in the Availability state are also in the same direction and are all Ports of type in. The transfer direction is from STK2 to STK1. Proceed to Step 4;

[0048] 2) If the result of the operation is 0, it means that there are no OHCVs running in the same direction. Proceed to Step 5;

[0049] Step 3: Just change the type of any one Port of type InService corresponding to the OHCV with the Availability state on the STK1 side to in; As shown in Figure 3As shown, at this time, only OHCV1 and OHCV3 are in the In Service state and in the same direction. Therefore, for the Port corresponding to OHCV1 whose Availability state on the STK1 side is switched, the type of the Port in the In Service state can be set to in. By switching the conveying direction of OHCV1, two-way conveying can be achieved.

[0050] Step 4: Just set the type of any one of the Ports in the In Service state corresponding to the OHCV whose Availability state on the STK1 side is switched to out;

[0051] Step 5: Do not switch the direction of the OHCV Port;

[0052] Step 6: Set the interval time M. Assume M = 10 minutes. The conveying direction of the OHCV Port is switched regularly every 10 minutes. For conveyances that cannot be carried out due to incorrect conveying directions, the MCS will reject the conveyance command request from the MES. Since the MES has a retransmission mechanism, after 10 minutes, the MCS switches the direction of the OHCV Port. When the MES reissues the previously unexecutable command, the MCS will receive this conveyance command and perform the conveyance task.

[0053] If the result of the statistical count in Step 1 is equal to 1, it means that only 1 OHCV is in the Availability state. At this time, Step 6 is not executed, but directly proceed to Step 7;

[0054] Step 7: As Figure 5 shown, this solution is an enhanced version of Step 6. Because in Step 6, it is assumed that there is no conveyance task from STK1 to STK2 at this time, and the direction of the OHCV has just been switched to the direction from STK1 to STK2. To convey from STK2 to STK1, one has to wait for the next OHCV direction switch after 10 minutes to perform the conveyance task. This wastes waiting time and lacks flexibility.

[0055] Step 7 is to receive all conveyance commands from the MES and determine the directions of the conveyance commands for STK1 and STK2. The determination method is as follows:

[0056] Check the commands whose origin device names are STK1 and STK2, and compare the number of origin names; if the number of origin device names STK1 is greater than STK2, then switch the only In Service type of STK1 to out; if the number of origin device names STK1 is less than STK2, then switch the only In Service type of STK1 to in;

[0057] During this period, the "wake-up transfer" function attempts to transfer transfer tasks that can be transferred. After transferring a certain number of transfer tasks, each time an end signal of a transfer task is received, a count statistic is performed. Assuming the count statistic threshold is set to 10, when the count statistic value is greater than or equal to 10, the current command is used to find the corresponding job. If the job is found, wait until the next count of 11 is greater than 10, then use the current command to find the corresponding job again. As long as the job is found, repeat the process of count statistic judgment and use the command to find the corresponding job until the job cannot be found, indicating that the job has been transferred successfully;

[0058] Continue to return to Step 1 to determine how many OHCVs are in the Availability state and perform a count statistic on the OHCVs in the Availability state; if it is equal to 1, perform Step 7 again until all jobs have been transferred successfully; if it is greater than 1, return to the normal mode of Step 2.

[0059] The present invention solves the problem that when an OHCV fails or stops and restarts, multiple OHCVs have the same transfer direction and the transfer production cannot continue automatically, and realizes the function of dynamically adjusting the OHCV, so that the "carrier" can still perform two-way transmission between STKs. Especially when only one OHCV can work, there is no need to adopt the original manual response method, which greatly reduces the time cost, liberates more human resources, and improves the efficiency of production operations.

[0060] Only some exemplary embodiments of the present invention have been described by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dynamic adjustment management method for STK OHCV, characterized in that, It includes the following steps: When receiving the start / stop signal of the OHCV Port, count the number of available OHCVs; If there are two or more available ones, judge whether all the Ports in the In Service state on the STK1 side are in the same direction. If they are all in the same direction, switch the conveying direction of any one of the OHCV Ports. If they are not all in the same direction, then do not switch the direction of the OHCV Port; If there is only one available one, switch the conveying direction of the OHCV Port at regular intervals; The specific operation steps are as follows: Step 1: When receiving the start / stop signal of the OHCV Port, judge how many OHCVs are in the Availability state, and count the OHCVs in the Availability state; If the result of the counting in Step 1 is greater than 1, it means that at least two OHCVs are in the Availability state. At this time, enter Step 2; If the result of the counting in Step 1 is equal to 1, it means that only one OHCV is in the Availability state. At this time, enter Step 6: Step 2: Perform a bitwise OR operation (logical OR operation is also acceptable) on all the Port types (in type value is 1, out type value is 0) in the In Service state on the STK1 side corresponding to all the OHCVs in the Availability state; A. If the result obtained from the operation in Step 2 is 0, it means that all the Ports in the In Service state on the STK1 side corresponding to all the OHCVs in the Availability state are in the same direction and are all out-type Ports, and the conveying direction is from STK1 to STK2. At this time, enter Step 3; B. If the result obtained from the operation in Step 2 is 1, then perform a bitwise AND operation (logical AND operation is also acceptable) on all the Port types in the In Service state on the STK1 side corresponding to all the OHCVs in the Availability state; 1) If the result obtained from the operation is 1, it means that all the Ports in the In Service state on the STK1 side corresponding to all the OHCVs in the Availability state are also in the same direction and are all in-type Ports, and the conveying direction is from STK2 to STK1. At this time, enter Step 4; 2) If the result obtained from the operation is 0, it means that there are no OHCVs running in the same direction at this time. At this time, enter Step 5; Step 3: Just switch the type of any one of the Ports in the In Service state corresponding to the OHCV in the Availability state on the STK1 side to in; Step 4: Just switch the type of any one of the Ports in the In Service state corresponding to the OHCV in the Availability state on the STK1 side to out; Step 5: Do not switch the direction of the OHCV Port; Step 6: Set the interval time M. The transportation direction of the OHCV Port is switched regularly every M minutes. For transportation that cannot be performed due to incorrect transportation direction, the MCS will reject the transportation command request from the MES. Since the MES has a retransmission mechanism, after M minutes, the MCS switches the direction of the OHCV Port. When the MES resends the previous non - transportable command, the MCS will receive this transportation command and perform the transportation task.

2. The dynamic adjustment management method for STK OHCV according to claim 1, characterized in that, If the result of the statistical count in Step 1 is equal to 1, it means that only 1 OHCV is in the Availability state. At this time, Step 6 is not executed, but directly proceed to Step 7. Step 7: Receive all transportation commands from the MES and determine the directions of the transportation commands for STK1 and STK2. The determination method is as follows: Check the commands whose origin device names are STK1 and STK2 in the transportation command, and compare the number of origin names. If the number of origin device names of STK1 is greater than that of STK2, it means that the transportation tasks of STK1 are more than those of STK2. At this time, switch the only In - Service Port type of STK1 to out. Otherwise, switch the In - Service Port type of STK1 to in. During this period, the "wake - up transportation" function will attempt to transport the transportation tasks that can be carried out. After transporting a certain number of transportation tasks, a count statistic is performed each time an end signal of a transportation task is received. Suppose the count statistic threshold is set to 10. When the count statistic value is greater than or equal to 10, use the current command to find the corresponding job. If the job is found, wait until the next count of 11 is greater than 10, and then use the current command to find the corresponding job. As long as the job is found, repeat the above process of count statistic judgment and using the command to find the corresponding job until the job cannot be found, which means the job has been transported. Continue to return to Step 1, determine how many OHCVs are in the Availability state, and perform a statistical count on the OHCVs in the Availability state. If it is equal to 1, then proceed to Step 7 again. Again, check the commands whose origin device names are STK1 and STK2 in the transportation command, and compare the number of commands with origin names of STK1 and STK2 to determine how to switch the direction type of the Port, and count the number of transportation tasks. After exceeding the threshold and the job transportation is completed, return to Step 1 again to check the number of OHCVs in the Availability state. Repeat this cycle until it is detected that the number of OHCVs in the Availability state is greater than 1, then return to the normal mode of Step 2.

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