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How Do AGVs, VGVs, AMRs, and ASRS Fit into Warehouse Automation?
Every industry seems to have its own set of acronyms that can quickly confuse outsiders. Within the industrial automation space, that list is substantial and can leave your head spinning. From AOI (automated optical inspection) to ZDT (zero downtime), the list sometimes confuses even those within the industry.
It can get particularly confusing when we’re talking about similar types of products, such as mobile robots and warehouse automation systems. AGV, AMR, ASRS, and VGV are all related technologies, but what makes them distinct from one another and how do they work together? Let’s take a look and provide some clarity.
Cutting Through Acronym Confusion
While all these technologies can improve operational efficiencies and help businesses protect themselves against disruptions such as labor shortages, they are all indeed different.
AGVs (automated guided vehicles) are mobile robots that follow a fixed path, such as magnetic tape, wires, QR codes, or reflectors — though some AGVs leverage machine vision systems for guidance. AGVs are primarily used for transporting materials in warehouse or factory floor environments with high-volume and consistent transport needs. These robots require stable and regulated environments. Robot path changes require physical reconfiguration or software modifications. AGVs offer less flexibility than AMRs, and initial costs for the robot itself are often lower. But implementation costs may be higher with the need for infrastructure changes (installation of magnetic tape, wires, and so on). Reconfiguration also adds cost.
AMRs (autonomous mobile robots) and AGVs perform similar tasks, but instead of following fixed paths, AMRs use technologies such as simultaneous localization and mapping (SLAM), lidar, 3D vision, laser scanners, and onboard computing to navigate warehouse or factory floors. These robots can autonomously avoid obstacles such as people or forklifts and adjust in real time, making them more suitable in dynamic environments where operations change often. These robots typically involve a higher upfront cost and a more rigorous safety validation certification process, but they offer much more flexibility than AGVs.
VGVs (vision-guided vehicles), AGVs, and AMRs perform similar tasks, but VGVs use a hybrid approach: They leverage sensors such as lidar and 3D imaging instead of markers along a fixed path but also typically following a learned path (without the use of additional infrastructure). These robots are less flexible than AMRs but more dynamic than AGVs, offering an option between fixed paths and full autonomy in terms of capabilities, cost, and the difficulty of safety validation.
An ASRS (automated storage and retrieval system) automates the storage and retrieval of goods in a high-density environment. Such systems often leverage several automation technologies, including machine vision, robots, and AI software, to coordinate the movement of goods within a grid structure. Often AMRs are used within an ASRS, moving at speeds of 20+ mph to retrieve or place goods in a storage area.
Total Warehouse Automation
Symbotic’s scalable warehouse automation system contains an ASRS but offers end-to-end automation, including induction, storage, retrieval, box routing and sequencing, case optimization, and pallet-building through AI software and a fleet of advanced AMRs. Simply put: Symbotic systems do not just provide storage and retrieval capabilities; they automate the entire warehouse from receiving to outbound pallets.