Goods-to-Person AMR

Latent Mobile Robot (LMR)

Drives beneath storage pods, lifts them entirely off the floor, and delivers them to ergonomic picking stations — eliminating walking and maximising pick rates without any fixed conveyor infrastructure.

500 kg
Pod Lift Capacity
Pick Rate vs Manual
30%
Floor Space Saving
2 m/s
Max Speed
8 h
Battery Runtime
±10 mm
Positioning Accuracy
Latent Mobile Robot goods-to-person system

What is a Latent Mobile Robot?

A Latent Mobile Robot (LMR) — sometimes called a pod-lifting or sub-drive AGV — is a compact, floor-running robot that slides beneath a freestanding storage pod, engages a central lifting pin, and raises the entire pod 3–5 cm off the floor. It then navigates autonomously to a picking workstation (port), where an operator picks the required SKU. The pod is then returned to storage and the next pod dispatched — all without the operator moving more than 1–2 steps.

Because the pods are free-floating and not attached to any racking, the storage layout can be instantly reconfigured by the Fleet Management System (FMS). No aisles are fixed; robots pack inventory into a dense matrix and open a "virtual aisle" only when retrieval is needed — achieving 30–40% higher storage density vs conventional shelving.

Econocontrol integrates LMR fleets with barcode / QR / RFID pod identification, WMS order-slotting algorithms, and multi-zone picking stations to scale from 5 robots to 500+ in the same facility.

Working Principle

1
Order ReleaseWMS releases a pick order to the FMS. FMS selects the nearest available LMR robot and the target pod location.
2
Pod RetrievalRobot drives beneath the pod, lifts via cam-lock pin, and navigates to the assigned picking port via SLAM + QR grid.
3
Goods-to-Person PickOperator picks the required item guided by put-to-light or screen display. Average pod dwell time: 15–25 s.
4
Pod Return & ReslotFMS sends robot back to an optimised storage slot, prioritising high-velocity SKUs near picking ports for next-order speed.

Key Features

📦

No Fixed Racking

Storage pods stand freely — no bolts, no floor anchors. Full warehouse reconfiguration in hours, not weeks. Ideal for seasonal SKU mix changes.

🧭

SLAM + QR Navigation

Dual-layer navigation: QR code floor grid for ±10 mm docking precision + SLAM LiDAR for open-floor obstacle avoidance with no infrastructure wiring.

Auto Fast-Charge

Robots autonomously dock at charging stations when battery dips below threshold. Opportunity charging between picks keeps uptime above 22 h/day.

🛡️

ISO 3691-4 / PL-d Safety

360° laser safety field, emergency-stop on all faces, and PL-d rated safety PLC. Human-robot shared zones certified to EN ISO 3691-4.

📊

Dynamic Slotting

FMS tracks velocity and re-slots fast-movers closer to picking ports overnight, reducing average travel time 20–35% with no manual intervention.

🔗

WMS / ERP Integration

REST/SOAP API + standard WMS connectors (SAP, Oracle, Manhattan, GreatWall). Real-time inventory feeds — no separate middleware layer required.

Technical Specifications

Robot Unit

Drive Type4-wheel differential drive
Max Speed2.0 m/s (laden) / 2.5 m/s (unladen)
Pod Lift Capacity500 kg
Lift Stroke30–50 mm (cam-lock pin)
NavigationSLAM LiDAR + QR floor grid
Positioning Accuracy±10 mm at pod dock
Robot Dimensions (L×W×H)680 × 600 × 340 mm
Robot Weight75 kg
Battery Capacity48 V / 40 Ah lithium-iron
Runtime per Charge≥ 8 h (standard duty)
Charge Time2 h full; opportunity charging
SafetyISO 3691-4, PL-d, EN 1525
IP RatingIP54
Operating Temperature-10°C to +40°C

System Configuration

Pod Footprint600×600 mm to 1,200×800 mm
Pod Height (max)1,800 mm
Shelves per Pod4–8 adjustable levels
Min Fleet Size5 robots
Max Fleet Size500+ robots per zone
Picking Ports1 port per 8–15 robots
Throughput per Port300–500 picks/h
Floor Flatness RequiredFF ≥ 40 (ASTM E1155)
Grid Sticker Spacing500 mm × 500 mm
CommunicationWi-Fi 802.11 a/b/g/n/ac (5 GHz)
FMS ConnectivityREST API, MQTT, OPC-UA
WMS InterfaceSAP, Oracle, custom adapters

Application Industries

E-commerce fulfilment

E-commerce

Peak-season scalability — add robots in days, not months. Handles high-mix, low-volume B2C order profiles with <30-min SLA fulfilment.

Pharmaceutical warehouse

Pharmaceutical

FEFO-compliant pod slotting with full lot-number traceability. Clean-room rated variants available. Integrates with GxP-validated WMS.

Retail distribution

Retail Distribution

Multi-channel (store replenishment + DTC) from a single pod matrix. Dynamic zone allocation by channel priority at order drop time.

3PL logistics

3PL / Contract Logistics

Tenant-partitioned pod zones, per-client billing metrics via FMS, and rapid client onboarding with preconfigured pod templates.

Frequently Asked Questions

Robot count depends on pick rate target, pod travel distance, and shift pattern. A typical starting configuration: 1 robot per picking port × 8–12 for buffer, plus 1 charger per 6–8 robots. Econocontrol provides a free throughput simulation with your order profile and floor plan before any purchase commitment.
Minimal. The main requirements are a flat floor (FF ≥ 40) and QR sticker installation (self-adhesive, 500 mm grid, applied in 1–2 days for a 2,000 m² zone). No racking is bolted to the floor, no conveyor trenches are cut, and no high-voltage supply is needed beyond standard 3-phase for the charging stations.
Yes. The storage zone (grid area) is a robot-only zone with light-curtain or barrier entry control. Picking ports are human-only zones where pods are presented to operators. The two zones never mix. This separation allows ISO 3691-4 compliance without fully fencing the entire warehouse floor.
The FMS detects a fault and reroutes tasks to other robots within seconds — no manual intervention needed. The faulty robot issues a self-diagnosis log and raises a maintenance alert. Because robots are interchangeable, a spare unit can be swapped by a technician without any software reconfiguration. Mean-time-to-repair is typically under 30 minutes.

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