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Time parameters verification of a numerical simulator of an automated store warehouse

Rzydzik Sebastian, Kroczek Piotr

Bulletin of the Polish Academy of Sciences. Technical Sciences

2024

Vol. 72, nr 3

art. no. e149816

The intelligent automated store warehouse (iZMS) research and development project was created to meet the expectations of a modern automatic store. The project concerns the development of the concept and pilot implementation of an automated store warehouse adapted to the autonomous and automatic sales of goods selected by retail chains. One of the aims of the iZMS project is to develop a scalable solution that allows for the simple adaptation of the iZMS to the needs of a potential customer, considering their requirements in terms of the quantity and variety of assortment offered within the iZMS. An important requirement in the use of the iZMS system is minimizing the customer waiting time for purchased products. This problem is related, among others, to the placement of products on the shelves of racks and will be solved in the optimizing process. Running optimization tasks requires a simulator that will mimic the features of a physical device faster than in real time to generate many proposals of the allocation of goods on storage racks in the shortest possible time and choose the best one, guaranteeing the shortest picking time of a representative basket of goods. A numerical simulator was developed to model the physical structures of food storage equipment and then simulate the sales process. Among the results obtained, the most important are the time parameters of individual operations,which will be used to optimize the placement of goods on storage racks. After analyzing the needs resulting from the usage of the iZMS system, we decided to develop a dynamic, deterministic simulator with discrete objects and perform the simulation with a controlled time increment and, in some cases, utilize elements of event-driven simulation, in which the flow of goods is simulated with first-in, first-out (FIFO) queues. Finally, verification of the numerical simulator with a physical model confirmed that it could be employed in optimization processes.

Disposable personal protective equipment vending machine

Samborski Tomasz, Zacharski Andrzej, Zbrowski Andrzej, Mrozek Mirosław, Kozioł Stanisław, Hallenburg Margaret

Technologia i Automatyzacja Montażu

2023

nr 2

33--40

The article presents the concept and structure of a prototype of a vending machine that can dispense disposable personal protection equipment (PPE) or other products with similar physical properties (size, weight) to be used in outpatient clinics, hospitals or beauty parlours, where special and effective protection against pathogens is required, particularly during the pandemic. Due to the difficult-to-predict and unspecified technical and on-site conditions for the installation and use of the device, the authors wanted to achieve autonomy by using a replaceable battery as a power source and large storage capacity of a product rack, at a limited size of the device. The machine operates on a contactless payment system (credit/debit card or NFC mobile payments) – to buy a gown, a customer just has to tap or wave their card on or over the card reader installed in the front wall of the cabinet. Purchased products are dispensed automatically, once the transaction has been approved. The vending machine is also equipped with a removable dispenser to better manage any waste generated. The prototype was comprehensively tested in accordance with the developed verification methodology, in cooperation with an entity interested in implementing the device.

Publikacja przedstawia koncepcję oraz budowę prototypowego urządzenia (automatu vendingowego) do samoobsługowej sprzedaży jednorazowej odzieży ochronnej lub innych produktów o podobnych cechach fizycznych (wymiary, masa) dedykowanego do zastosowań w przychodniach, szpitalach, gabinetach kosmetycznych, gdzie wymagana jest szczególna i skuteczna ochrona przed patogenami, zwłaszcza w okresach nasilonego narażenia epidemicznego. Ze względu na trudne do przewidzenia i nieokreślone warunki techniczne i lokalowe instalacji i użytkowania urządzenia, celem autorów było uzyskanie autonomiczności dzięki zasilaniu elektrycznemu z wymiennego akumulatora i dużej pojemność magazynka urządzenia przy ograniczonych gabarytach. Zastosowano terminal realizujący płatności bezgotówkowe oraz automatyczne wydawanie odzieży po ich zaakceptowaniu. Wbudowano wymienny zasobnik ułatwiający zagospodarowanie powstających odpadów. Wykonany prototyp poddano kompleksowym badaniom zgodnie z opracowaną metodyką weryfikacji, we współpracy z przedsiębiorcą zainteresowanym wdrożeniem rozwiązania.