# How Exoskeletons Stay Safe by Detecting Faulty Sensors > This patent describes a system for exoskeletons that detects when a sensor might be faulty by comparing its readings with other sensors, then switches to a backup and activates a safety mode to prevent harm. - **Patent:** US 12734676 - **Original title:** Sensor suite discrepancy detection system for safe operation of an exoskeleton - **Granted:** 2026 - **Status:** Active - **Times cited:** 0 - **Field:** robotics, medical_devices, wearable_technology, software, mechanical ## What it does This patent describes an exoskeleton with a system to ensure safe operation by detecting sensor problems. It works by comparing the data from a user-operated force moment sensor with at least one torque sensor located in a joint mechanism. If the system identifies a discrepancy between these sensor readings, it can then recruit a substitute sensor from a backup group. After identifying the issue and recruiting a new sensor, a controller activates a specific safety mode and takes a remedial measure to keep the exoskeleton user safe. For example, if a torque sensor in an elbow joint reports zero force while the user's hand sensor shows a strong grip, the system might detect a discrepancy, switch to a backup torque sensor, and then reduce the arm's power to prevent uncontrolled movement. ## What it does NOT cover - Does not cover exoskeleton safety systems that do not compare output data from at least two different types of sensors, like a force moment sensor and a torque sensor. - Does not cover safety systems that only detect sensor failure without recruiting a substitute sensor from a predefined group. - Does not cover exoskeletons that implement safety measures without first identifying a discrepancy between specific sensor types. - Does not cover general mechanical failures in an exoskeleton that are not related to sensor output discrepancies. - Does not cover safety protocols that do not involve executing a 'remedial measure' associated with a 'safety mode'. ## The clever bit The novelty lies in the system's ability to actively compare different types of sensor data (like user-applied force and joint torque) to spot inconsistencies, then dynamically switch to a backup sensor and engage a safety protocol, rather than just relying on a single sensor's self-diagnosis. ## Real-world examples 1. Medical rehabilitation exoskeletons 2. Industrial assist exoskeletons 3. Military load-carrying exoskeletons 4. Powered prosthetic limbs ## Why it matters Exoskeletons are complex machines that directly interact with human bodies, making safety paramount. A malfunction, especially a sensor failure, could lead to serious injury for the user. This system aims to build trust in exoskeleton technology by providing a robust way to detect and respond to sensor errors, which is critical for their widespread adoption in medical, industrial, and military applications. ## Frequently asked questions ### What does How Exoskeletons Stay Safe by Detecting Faulty Sensors cover? This patent describes a system for exoskeletons that detects when a sensor might be faulty by comparing its readings with other sensors, then switches to a backup and activates a safety mode to prevent harm. ### When does this patent expire? This patent is expected to expire on September 15, 2046, when the invention enters the public domain. ### What problem does this patent solve? Exoskeletons are complex machines that directly interact with human bodies, making safety paramount. A malfunction, especially a sensor failure, could lead to serious injury for the user. This system aims to build trust in exoskeleton technology by providing a robust way to detect and respond to sensor errors, which is critical for their widespread adoption in medical, industrial, and military applications. ### What does this patent NOT cover? Does not cover exoskeleton safety systems that do not compare output data from at least two different types of sensors, like a force moment sensor and a torque sensor. **Full plain-English explainer:** https://patentbrief.org/patent/us/12734676/sensor-suite-discrepancy-detection-system-for-safe-operation-of-an-exoskeleton **Original patent:** https://patents.google.com/patent/US12734676 --- _Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._ ## Related patents Semantically similar inventions in the PatentBrief corpus: - [Exoskeleton Shoulder Joint That Adapts to Your Arm's Movement](https://patentbrief.org/patent/us/10814473/mechanism-for-alleviating-the-effects-of-joint-misalignment-between-users-and-we) — This patent describes a shoulder exoskeleton that uses a special slip mechanism to prevent the robot's joints from getting out of sync with a user's natural arm movements, making it more comfortable and effective. - [How an Exoskeleton Joint Moves with a Motor, Screw, and Linkage](https://patentbrief.org/patent/us/11673253/actuator-devices-for-human-exoskeleton-joints) — This patent describes a compact and efficient way to make an exoskeleton joint bend and straighten using a motor, a special screw, and a clever set of levers. - [How a Robotic Exoskeleton Helps Your Shoulder Move](https://patentbrief.org/patent/us/10800031/spherical-parallel-manipulator-architecture-for-shoulder-robotic-exoskeleton) — This patent describes a robotic shoulder exoskeleton using multiple straight-moving actuators arranged in a "spherical parallel manipulator" to assist or rehabilitate arm movements while preventing joint misalignment. - [How Exoskeletons Use Screws and Cables to Move Joints](https://patentbrief.org/patent/us/10702441/ball-screw-and-tensile-member-exoskeleton-joint-actuation-device) — This patent describes a mechanical system for exoskeletons that uses a rotating screw to push a nut, which then pulls cables to make a joint bend or straighten. - [Customizable Robotic Leg Braces and Modular Exoskeletons](https://patentbrief.org/patent/us/11413210/customizable-orthoticprosthetic-braces-and-lightweight-modular-exoskeleton) — This patent describes a lightweight, customizable robotic leg brace system, or exoskeleton, that helps people with leg weakness walk by using special joint motors and braces molded to their body.