Abstract
IoT-based measurement systems for manufacturing have been widely implemented. As components that can be implemented at low cost, BLE beacons have been used in several systems developed in previous research. In this work, we focus on the Kanban system, which is a measure used in manufacturing strategy. The Kanban system emphasizes inventory management and is used to produce only required amounts. In the Kanban system, the Kanban cards are rotated through the factory along with the products, and when the products change to a different process route, the Kanban card is removed from the products and the products are assigned to another Kanban. For this reason, a single Kanban cannot trace products from plan to completion. In this work, we propose a system that uses a Bluetooth low energy (BLE) beacon to connect Kanbans in different routes but assigned to the same products. The proposed method estimates the beacon status of whether the Kanban is inside or outside a postbox, which can then be computed by a micro controller at low computational cost. In addition, the system connects the Kanbans using the beacons as paired connection targets. In an experiment, we confirmed that the system connected 70% of the beacons accurately. We also confirmed that the system could connect the Kanbans at a small implementation cost.
Highlights
In recent years, the Internet of Things (IoT) has become a widely discussed topic
If a line is bent like the 1st, 6th, 7th, and 9th lines and lacks points like the 9th, 10th, 13th, and 18th lines from the left, there will be estimation errors caused by the failure to receive the Bluetooth wave, lack of communications in the low power wide area (LPWA) network, hardware resetting with continuous duty, and so on
The system is constructed with Bluetooth low energy (BLE) beacons, base-stations, gateways, and servers
Summary
The Internet of Things (IoT) has become a widely discussed topic. IoT is expected to enhance our health maintenance and facilities in daily life, to lead to greater efficiencies, and to find anomalies in industrial processes, among other benefits. Industry 4.0 has rapidly populated in recently ears It connects products, processes, people, and physical systems more efficiently [1]. We focus on providing a product-tracing system that can be introduced at low cost and that does not require workers to take specific actions. This system consists of Bluetooth low energy (BLE) beacons and a low power wide area (LPWA) network. The Kanban system is very efficient for reducing dead stock and inventory management, by indicating how many products are required and processed. The blockchain requires transactions for each section of the products manufactured, but the traditional Kanban system does not have digital information of transactions.
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