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CN-120854350-B - Material handling system and abnormal control method thereof

CN120854350BCN 120854350 BCN120854350 BCN 120854350BCN-120854350-B

Abstract

The invention discloses a material handling system and an abnormal control method thereof, wherein the abnormal control method comprises the steps of storing at least one group of passable direction groups which are mutually noninterfere for a target control area in advance, wherein the passable direction groups are one or more driving directions which can be simultaneously authorized to pass by an overhead traveling crane and cannot generate path conflict in the control area when the area controller is in fault, starting temporary take-over control on the control area corresponding to the target area controller in response to the target area controller being in an abnormal state, receiving a passing request of the overhead traveling crane at a stopping point at an entrance of the control area, wherein the passing request comprises the driving direction of the overhead traveling crane, and judging whether the driving direction belongs to a first passable direction group which is activated currently. The abnormal control method of the material handling system not only can effectively relieve the influence on the handling efficiency under abnormal conditions, but also can ensure the timeliness of handling and ensure the stability and the reliability of the material handling system.

Inventors

  • GUO MING
  • WU BIN
  • WANG HONGYU

Assignees

  • 苏州新施诺半导体设备有限公司

Dates

Publication Date
20260512
Application Date
20250717

Claims (10)

  1. 1. An anomaly control method for a material handling system, the method comprising: S100, pre-storing at least one group of non-interfering passable direction groups aiming at a target control area, wherein the passable direction groups are one or more driving directions which can be simultaneously authorized to pass the crown block without generating path conflict in the control area when an area controller fails; s200, responding to the abnormal state of a target area controller, and starting temporary takeover control of a control area corresponding to the target area controller; s300, receiving a passing request of an overhead travelling crane at a stopping point at the entrance of the control area, wherein the passing request comprises the travelling direction of the overhead travelling crane; s400, judging whether the driving direction belongs to a first passable direction group activated currently; If so, S500, sending an authorized passage instruction to the crown block; If not, S600, switching the first passable direction group activated currently to a second passable direction group in response to the preset switching condition, wherein the second passable direction group is a prestored other passable direction group which does not interfere with each other and comprises the affiliated driving direction.
  2. 2. The method of anomaly control of a materials handling system of claim 1, wherein the anomaly condition comprises one or more of: The heartbeat connection between the conveying control system and the target area controller is interrupted or the connection is overtime; the conveying control system receives an error state report from a target area controller; The conveying control system receives abnormal information which is reported by an overhead travelling crane and is associated with a target area controller and is positioned at a stopping point at an entrance of the target control area, wherein the abnormal information comprises information that the overhead travelling crane fails to communicate with the target area controller and/or the overhead travelling crane receives an error response of the target area controller.
  3. 3. The anomaly control method for a materials handling system of claim 1, wherein step S500 comprises: Authorizing the current crown block to pass; Responding to the running direction of the current crown block as a straight running direction, and after authorizing the current crown block to pass, authorizing crown block passing requests in the same straight running direction without waiting for the current crown block to leave the control area; responsive to the direction of travel of the current crown block being a curve direction of travel, after authorizing the current crown block to pass, authorization of a crown block pass request of the same curve direction of travel is performed after confirming that the current crown block has left the control area or has passed a release point of the curve.
  4. 4. A method of anomaly control for a materials handling system as set forth in claim 3, wherein said means for confirming that a current crown block has left the control area or has passed a release point of the curve comprises at least one of: The conveying control system receives the driving-off notification actively sent by the current crown block and And the conveying control system judges whether the current crown block has driven out of the boundary of the control area or passed through the release point of the curve by monitoring the position report information of the current crown block.
  5. 5. The method of anomaly control for a materials handling system of claim 1, wherein the preset switching conditions in step S600 include one or more of the following preset switching conditions: The first passable direction group activated at present does not receive a new passing request within a preset time period; The transfer control system receiving the switching instruction, and And confirming that no crown block exists in the control area currently.
  6. 6. The anomaly control method for a materials handling system of claim 1, further comprising, after step S100: In response to the target area controller being in an abnormal state, the conveying control system sets an overhead travelling crane access limit for an upstream inlet of the control area, wherein the overhead travelling crane access limit is used for preventing a new overhead travelling crane from entering the control area; after the conveying control system confirms that all the crown blocks in the control area are driven away, responding to the target area controller to recover the normal state from the abnormal state, and releasing the crown block entering limit by the conveying control system.
  7. 7. The method of anomaly control for a materials handling system of claim 1, wherein the pre-stored mutually non-interfering passable direction sets are analyzed and determined based on the target control area track layout structure.
  8. 8. A material handling system comprising a handling control system, a plurality of crown blocks running along a track, and a plurality of zone controllers disposed at the intersection and/or the junction of the track, the zone controllers being responsible for controlling the authority of passage of crown blocks within the zone in which they are located, the handling control system comprising a controller for performing the anomaly control method of the material handling system of any one of claims 1 to 7.
  9. 9. The materials handling system as set out in claim 8, wherein said control area comprises a plurality of entrance areas in which are disposed sensing means for communicating with the crown block and a first sensor for confirming entry of the crown block into the control area, and a plurality of exit areas in which are disposed a second sensor for detecting whether the crown block is driving away.
  10. 10. The materials handling system as set forth in claim 9, wherein said entrance area is provided with a stopping point for the crown block to wait, and said exit area is provided with a release point for the crown block to travel away.

Description

Material handling system and abnormal control method thereof Technical Field The invention relates to the technical field of automatic material conveying systems, in particular to a material conveying system and an abnormal control method thereof. Background In high-end precision industries such as semiconductor manufacturing, an automated material handling system (AMHS for short) is a core infrastructure that ensures efficient and stable operation of a production line. The transport control system (Transport Control System, abbreviated as TCS) is used as a "neural center" of the AMHS of the automated material transport system, and is not only responsible for path planning and driving control of the overhead travelling crane (Overhead Hoist Transport, abbreviated as OHT), but also needs to monitor the running states of the track and peripheral equipment in real time. Under the scene of the strip-type track, an area controller (Zone Control Unit, ZCU for short) for the deployment of the bifurcation and confluence opening areas of the track accurately schedules the material transportation by establishing a communication authorization mechanism with the crown block. In the prior art, when the regional controller ZCU fails abnormally, a strategy of cutting off an upstream passage and manually performing remote intervention is generally adopted, and the crown block in the abnormal region is removed and overhauled. Although this solution can temporarily solve the problem of failure, in the complex network topology of the AMHS of the automated material handling system, if the failure occurs in the central section or in the only path, the material handling chain will be broken directly, resulting in a sudden drop in handling efficiency. In addition, the residence time of the materials on the overhead travelling crane OHT is prolonged, and the scrapping risk caused by environmental factors such as temperature and humidity, cleanliness and the like can be obviously increased. In addition, chinese patent application CN114755992a, entitled transport system and its abnormal control method, proposes a redundant configuration strategy to reduce the fault impact, but a large amount of ZCU hardware and its associated software controller are deployed under the layout of very long tracks of tens of kilometers in the wafer factory. The large-scale redundancy configuration not only greatly increases equipment purchase, installation and maintenance costs, but also aggravates complexity of system management, and forms double challenges for enterprise cost control and operation efficiency improvement. Disclosure of Invention The invention aims to provide a material conveying system and an abnormal control method thereof, which not only can effectively relieve the influence on conveying efficiency under abnormal conditions, but also can ensure timeliness of conveying and ensure stability and reliability of the material conveying system. The invention adopts the following technical scheme: An anomaly control method for a material handling system, for use in a handling control system, the method comprising: S100, pre-storing at least one group of non-interfering passable direction groups aiming at a target control area, wherein the passable direction groups are one or more driving directions which can be simultaneously authorized to pass the crown block without generating path conflict in the control area when an area controller fails; S200, responding to the abnormal state of the target area controller, and starting temporary takeover control of a control area corresponding to the target area controller; s300, receiving a passing request of an overhead travelling crane at a stopping point at the entrance of the control area, wherein the passing request comprises the travelling direction of the overhead travelling crane; s400, judging whether the driving direction belongs to a first passable direction group activated currently; If so, S500, sending an authorized passage instruction to the crown block; If not, S600, switching the first passable direction group activated currently to a second passable direction group in response to the preset switching condition, wherein the second passable direction group is a prestored other passable direction group which does not interfere with each other and comprises the affiliated driving direction. In one embodiment, the abnormal state of the abnormal control method of the material handling system comprises one or more of abnormal states that a heartbeat connection between the handling control system and a target area controller is interrupted or the connection is overtime, the handling control system receives an error state report from the target area controller, the handling control system receives abnormal information related to the target area controller, reported by an overhead crane positioned at a stopping point at an entrance of a target control area, and the abnormal information compris