Multimodal Reasoning with Knowledge Graphs

Multimodal Reasoning with Knowledge Graphs

As AI systems become more deeply embedded into industrial environments, engineers increasingly rely on multiple types of data—text, images, sensor logs, equipment manuals, and structured asset databases—to make informed decisions. The challenge is clear: how do we help AI reason across these diverse modalities the way a human expert would?

What Are Knowledge Graphs?

A knowledge graph represents information in a structured, interconnected form—linking entities (equipment, components, materials, documents) through relationships (depends on, causes, located in, connected to). This structure makes it possible for AI to “navigate” knowledge rather than merely recall isolated facts. This connectivity is crucial in industrial settings, where questions rarely involve a single data type:

  • What caused last week’s pressure spike on Train B?
  • Which upstream conditions contribute to high compressor vibrations?
  • Which tags, manuals, and past work orders relate to this alarm?

A multimodal knowledge graph links all relevant sources—text, numbers, images, and simulation outputs—into one coherent structure. AI agents can traverse this structure the same way engineers follow causal chains across documents, diagrams, and historical logs.

Article content
Figure1, Example of a Knowledge Graph Structure, Source: Neo4j Blog-"What is a Knowledge Graph?"

How Multimodal Reasoning Works

Multimodal reasoning goes beyond simply combining images with text. It enables AI to understand how different types of information reinforce or contradict each other.

An equipment tag may point to a sensor trend.That trend may reference a manual specification. That manual may contain a diagram linked to a component. That component may appear in the FMEA knowledge graph.

The power comes from connecting these knowledge pathways.

Modern architectures—such as unified encoders, graph attention networks, and cross-modal transformers—allow AI to embed these modalities into a shared representation. CombFromined with the structure of a knowledge graph, the system doesn't just “store” information; it reasons across it.

This unlocks deeper capabilities: identifying patterns across systems, discovering hidden relationships, and generating insights that would be extremely difficult to surface through traditional search or manual review.

Article content
Figure2. Knowledge Graph&Multimodal knowledge Graph. Source: Chen et al. 2023

Real-World Use Case: Simulation-Aware FMEA Analysis-Knowledge-Graph Driven FMEA

In many plants, Failure-Mode-and-Effects-Analysis (FMEA) knowledge lives in static spreadsheets, isolated databases, or tribal knowledge scattered across teams. When something goes wrong, engineers search through manuals, logs, and work orders, often without a unified view that connects causes, conditions, and historical patterns.

BKOAI’s Simulation-Aware FMEA System integrates these sources into a dynamic knowledge graph that provides real-time, multimodal reasoning for failure analysis.

When an engineer asks a question like: “What is the overheating risk of the main hydraulic pump?”

The system activates a coordinated reasoning process:

  • The knowledge graph retrieves documented failure modes related to overheating.
  • Semantic extraction from manuals surfaces operating limits and procedures.
  • Maintenance logs reveal recurring issues or early-warning patterns.
  • Sensor feeds and simulation outputs show current operating conditions.
  • Predictive models estimate near-term risk levels.

All of this context is merged into a single, explainable narrative generated by an AI agent that navigates the knowledge graph instead of searching isolated systems.

The result is a continuously evolving intelligence layer that transforms FMEA from static documentation into a living, data-driven decision engine.

Article content
Figure3. Conceptual workflow of BKOAI‘s Knowledge-driven FMEA reasoning

Why This Matters for Industrial AI

As plants generate more data—from simulations, real-time sensors, AI assistants, and legacy systems—the ability to unify and reason across modalities becomes essential. Multimodal knowledge graphs provide:

  • richer semantic understanding
  • stronger decision support
  • deeper traceability and explainability
  • scalable integration with agentic systems

At BKOAI, we see MMKGs as the foundation for next-generation industrial intelligence—powering deep search, autonomous analysis, simulation-aware decision making, and cross-system interoperability.