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PLC (programmable logic controller) programming method for automatic stereoscopic warehouse system based on Petri net

A technology for automated warehouses and three-dimensional warehouses, which is applied in the field of designing programmable logic controller programs based on Petri nets, and can solve problems such as algorithms that have not yet been formed.

Inactive Publication Date: 2015-05-13
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] 3. For the research on the transformation method from Petri net to PLC ladder diagram program, it is usually to give a Petri net model for a specific example, and then convert it into a ladder diagram. A complete and unified algorithm has not yet been formed. The actual results of the existing Application has certain limitations

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  • PLC (programmable logic controller) programming method for automatic stereoscopic warehouse system based on Petri net
  • PLC (programmable logic controller) programming method for automatic stereoscopic warehouse system based on Petri net
  • PLC (programmable logic controller) programming method for automatic stereoscopic warehouse system based on Petri net

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Embodiment Construction

[0049] The present invention will be further described below through specific embodiments.

[0050] In order to set forth the specific content of the present invention, we need to provide following basic concepts:

[0051] 1. Ordinary Petri net

[0052] Ordinary Petri net is a triplet N(P,T,F), P is a place set; T is a transition set; Represents the set of directed arcs between places and transitions; m: P→Z represents the identity, m(p) refers to the number of tokens in place p, m 0 is the initial identification; · t and t · Respectively represent the input place set and output place set of transition t; if Then transition t is enabled under the label m, denoted as m[t>; if t fires, remove a token from each of its input places, and add a token to each of its output places , get the successor mark m', denote as m[t>m'.

[0053] 2. Automated three-dimensional warehouse system

[0054] A typical automated three-dimensional warehouse system includes two workflows, wareho...

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Abstract

The invention discloses a PLC (programmable logic controller) programming method for an automatic stereoscopic warehouse system based on a Petri net, wherein the PLC programming method comprises the following steps: 1) establishing an object Petri network model for ex-warehouse process of the automatic warehouse system; 2) establishing a closed Petri net model of the automatic warehouse system; 3) converting the closed Petri network model into a PLC ladder-chart program. Compared with an expansion Petri net, the common Petri net is relatively simple in semantics, simple in excitation condition, relatively visual and luminous in net model, easy to analyze, and has universal relevance, a manure analyzing tool and theoretical basis.

Description

technical field [0001] The invention relates to the field of outbound procedures of an automated three-dimensional warehouse system, in particular to a method for designing its Programmable Logic Controller (PLC) program based on Petri nets. Background technique [0002] With the continuous development of automation technology, automated three-dimensional warehouses have gradually entered factories. It can not only reduce labor force, but also save time and cost. It is considered a revolutionary breakthrough in logistics technology. The automated three-dimensional warehouse is a complex integrated automation system, which uses technologies such as programmable logic controllers (programmable logical controller, PLC), sensors and position control, and has the functions of automatic extraction and storage of goods. , stacker, conveyor and automatic guided vehicle (automated guided vehicle, AGV) and other equipment constitute the material transmission line, which closely connec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
CPCG05B19/056G05B2219/13004Y02P90/02
Inventor 宴来成陈珑倪会娟邵辉罗继亮
Owner HUAQIAO UNIVERSITY
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