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Design method of compact warehousing system

A storage system and design method technology, applied in the field of unmanned storage, can solve problems such as system setting differences, and achieve the effect of high throughput efficiency

Active Publication Date: 2021-07-16
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003]At present, in the design of the compact three-dimensional storage system (3D AS / RS), the design of the system size is considered, but at the same time it is necessary to design system settings are different

Method used

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  • Design method of compact warehousing system
  • Design method of compact warehousing system
  • Design method of compact warehousing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] Taking the case of C2 among the 36 cases as an example, the method of this embodiment is further described, and the specific derivation process of the expected time expression is given as follows:

[0109] S1: According to the sub-cases of system division, obtain the volume of the first area of ​​the system, the proportion of the volume of the first area, and the volume of the second area.

[0110]

[0111]

[0112]

[0113] S2: According to the expansion rule of time t, the order of critical time points is obtained as follows:

[0114]

[0115] S3: According to the critical time point, t in the first region can be divided into two key intervals: (a) 0<t≤h, (b) h<t≤b, and different intervals correspond to different shapes of the first region.

[0116] S4: Calculate the expected time of the first area.

[0117] To (a) (b) respectively calculate the volume of each interval, then obtain the probability density function according to the content of operation S10...

Embodiment 2

[0130]Taking the C1 case among the 36 cases as an example, the method of this embodiment is further described, and the specific derivation process of the expected time expression is given as follows:

[0131] S11: According to the process described in operation S105, the constraints and expected pick-up time of sub-case C1 are as follows. And the constraints of updating l and b are obtained according to the replaced constraints.

[0132] Constraint: 2 / l 2 ≥b&l / 2≥b / 2&l / 2≤2 / l 2

[0133]

[0134] Ranges: b≤min(l, 2 / l 2 )

[0135] S22: Make E[T A1 ] Deriving l to obtain the design result of the optimal system size and classification boundary time b.

[0136]

[0137] Based on the value range of l and b, it is not difficult to find that within this range, i.e. E[T A1 ] is an increasing function on l. In order to minimize the expected pickup, the optimal system size and classification boundary time b are:

[0138]

[0139]

[0140]

[0141] S33: Bring the...

Embodiment 3

[0146] see Figure 6 and Figure 7 , where the edge of the dotted line filled with the vertical line indicates that the position of the entrance and exit point is at the midpoint of the system horizontal direction (system A), and the area filled with the edge of the solid line with the left oblique line indicates that the position of the entrance and exit point is not in the horizontal direction of the system. The midpoint case (system B).

[0147] In addition to the previously mentioned parameters, define the following parameters:

[0148] α: distance between two entry and exit points

[0149] I / O1 (I / O2): The entry and exit point of system A (B)

[0150] Indicates the expected pick-up time of system A in area b (area I, II, III or IV in the figure). For example Indicates the expected pick-up time of system A in area I.

[0151] Case 1: The shape of the first area will not be affected by the movement of the entry and exit points

[0152] Such as Figure 6 As shown ...

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Abstract

A design method of a compact warehousing system comprises the steps that the length, the width and the height of the compact warehousing system are converted into time distances; a long middle point of the compact warehousing system is selected as an entrance and exit point, and a three-dimensional coordinate system is established; the compact warehousing system is divided into a first area and a second area based on the three-dimensional coordinate system and the time distances, the first area represents a set of areas with the goods taking time smaller than a preset value, and the second area represents a set of areas with the goods taking time larger than the preset value; on the basis of the first area and the second area, according to the goods demand degree of a user, a plurality of relations between the average goods taking time of all positions in the compact warehousing system and the size of the compact warehousing system are established; and the various relationships are optimized to obtain the size of the compact warehousing system corresponding to the minimum average goods taking time under a classified storage strategy. According to the method, higher throughput efficiency of the compact warehousing system can be realized.

Description

technical field [0001] The invention relates to the technical field of unmanned storage, in particular to a design method of a compact storage system. Background technique [0002] Compact storage systems have been widely used in recent years due to their advantages of increasing space utilization, saving land costs, saving labor and faster response. For a compact storage system, the design of its physical size and control strategy has a great influence on the retrieval efficiency. [0003] At present, in the design of the compact three-dimensional storage system (3D AS / RS), the design of the system size is considered, but the system settings that need to be designed are different. For example, there are four ways to set the storage strategy and the location of the entrance and exit points: first, the random storage strategy + the entrance and exit points are fixed at the lower left corner; second, the random storage strategy + the entrance and exit can be located at the bo...

Claims

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Application Information

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IPC IPC(8): B65G1/04B65G1/137
CPCB65G1/04B65G1/1373
Inventor 梁樑余玉刚余虎余嬖琳
Owner UNIV OF SCI & TECH OF CHINA
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