JPH0452808A - Method for controlling unmanned truck - Google Patents

Abstract

PURPOSE:To optimize the arrangement of an unmanned truck by applying an inter-queue moving instruction to an idle queue. CONSTITUTION:Respective queues are controlled based upon the queue arrangement schedule results of respective unmanned trucks and the departure information of the trucks, and when an idle queue is generated at the time of outputting a carrier request from a certain unmanned carrier truck, the queue 20 including the truck having the maximum rate of each queue to the regulated number of queuing trucks is selected and an inter-queue moving instruction to the idle queue 10 is applied to the leading truck 15b, so that rearrangement of carrying media can be automatically optimized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an unmanned vehicle rate placement scheduling method in a logistics transportation system using unmanned vehicles.

[Conventional technology]

In a transport system using an unmanned trolley, the unmanned trolley travels along a loop-shaped transport meridian and performs cargo handling during this time. When there is no more cargo handling work to be done, it waits at a predetermined position.

In this case, a small number of unmanned trolleys are used to carry out cargo handling efficiently.
2-50912 Publication) [Problems to be Solved by the Invention] Conventional apparatus schedules for conveyance media are based on a program that analyzes and infers the amount of work that occurs in each queue after a conveyance operation is performed on the conveyance medium. He was giving instructions to move between locations.

In the above-mentioned method, moving between special queues after a transportation task occurs degrades the service for transportation requests, and in a transportation system where transportation tasks occur accidentally, it is difficult to predict the occurrence of transportation tasks using a complicated program, and the system Due to its lack of flexibility, it also had the disadvantage of poor maintainability, such as the need to create programs strictly for each transportation condition under operating conditions with a limited number of unmanned trolleys.

[Means to solve the problem]

In order to achieve the above purpose, the number of queues for each unmanned trolley is managed based on the queue placement schedule results of unmanned trolleys and the departure reports of unmanned trolleys. When this occurs, the queue with the unmanned trolley body that has the largest ratio to the specified number of waiting vehicles in each queue is selected, and the leading unmanned trolley is assigned to wait in the empty queue. This system provides instructions for moving between queues and optimizes the placement of unmanned trolleys.

[For production]

The relocation schedule of unmanned trolleys according to the present invention is performed only when the queue in which the unmanned trolley was waiting at the time of the departure report is empty, so it is difficult to use a transport system where transport work occurs accidentally or due to transport conditions. Even when changes are made, the relocation of unmanned carts is automatically optimized, eliminating the need to create complex programs for each transport condition, thereby improving the maintainability of the system.

〔Example〕

Next, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, 10.20 is a predetermined position (hereinafter referred to as a queue position) where unmanned carts that are not working are waiting. The transport work range of unmanned trolleys at each queue position is A and B.
and some overlap.

25 is an unmanned trolley, 15a and 25a are in transport operation, and 15b and 25b are unmanned trolleys at queue position 10.20.

Here, when the waiting unmanned platform Rinku at the work area 1j queue position 1i10 is in the process of being transported, the queue of the special benefit interest rate 1110 for the work area person becomes the value obtained by subtracting 'm1''.

Here, if the number is zero (empty), it is considered that the transport work range A has a high work frequency. In addition, the unmanned trolley Takumi working in 1 work area A will receive special benefits for those in the work area after the work is completed!
Return to ilO and form a queue.

During this time (when the queue is empty and a new transport work occurs in the transport work area), the unmanned trolleys (2 units) 15 waiting at queue position I in the transport work range B will be used. It's convenient to do so.

Therefore, at the timing when the queue was empty at the start of transportation,
Perform the relocation schedule for the unmanned trolleys shown in Figure 2.

Since the number of queues is counted for each benefit coupon 1, it is determined whether or not the queue is empty when a transport request is made for each queue position (step 81).

If the queue is initially determined or empty, find the maximum queue position for the specified number of waiting cars (0 or more) for each other queue position (
Step 83).

Next, the unmanned cart at the head of the determined queue position is instructed to move toward the position requested for transportation (step 85).

As a result, people can be smoothly transported within the transport work area where the transport INA degree is high.

At this time, if there is only one unmanned cart in the queue for transport work range B, it is necessary not to issue an instruction to move between samurai lines.

Furthermore, when the frequency of transportation decreases, the unmanned carts automatically wait in the queue at a predetermined number, so there is no need to issue a rearrangement instruction again.

As described above, unmanned carts are automatically placed depending on the situation and assigned to the queue, so optimal placement control can be performed.

In the above embodiment, the movement between queues is selected based on the maximum number of queues, but the movement between queues may be selected in consideration of the amount of movement between queues.

Note that the prescribed number of waiting machines may differ depending on the queue position. In this case, selection is made based on the ratio of the number of queues to the specified number of waiting machines.

[Effect of climbing]

As explained above, the present invention performs the relocation schedule of the conveyance medium only based on the status of the conveyance work, and automatically performs the relocation schedule for conveyance media even when the conveyance work occurs accidentally or when the conveyance conditions are changed. The relocation of the transport medium is optimized accordingly.

Furthermore, the present invention eliminates the need to create complicated programs for each transport condition, thereby improving the maintainability of the system.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of an instruction to move between queues according to an embodiment of the present invention, and FIG. 2 is a flowchart of an embodiment of the processing of an instruction to move between queues shown in FIG. A, B...Transportation work range, 10.20...
...Queue position, 15 a, 15 b, 25
a, 25 b-・-Unmanned trolley agent Patent attorney Katsuo Ogawa

Claims (1)

[Claims] 1. In an unmanned trolley control method, the unmanned trolley forms queues at a plurality of specific predetermined positions after a transport operation, and each queue has a specific transport work range. The number of each queue is managed based on the queue placement schedule results and the departure report of the unmanned trolley, and if there is an empty queue at least at the time of request for transportation by an unmanned guided vehicle, the specified waiting time for each queue is performed. A method for controlling an unmanned trolley, comprising: selecting a queue having an unmanned trolley with the largest ratio to the number of vehicles; and instructing the leading unmanned trolley to move between the queues to an empty queue. .