Machine-Readable Sensor State Detection for Monitoring Devices

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Solution Overview

Problem

Monitoring devices affixed to items to detect environmental conditions face challenges in detection and interpretation, particularly for users with visual impairments or in suboptimal lighting conditions, leading to potential misinterpretation and improper handling of items.

Innovation Solution

Integration of a machine-readable indicium on monitoring devices, enabling assistive detection and interpretation by a computing device using a camera to capture images, decode the indicium, and determine the active state of the sensor, with output notifications for appropriate handling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If visual sensors are used to indicate environmental conditions, then environmental monitoring is enabled, but detection and interpretation becomes challenging for users with visual impairments or in suboptimal lighting conditions

Engineering Contradiction:

Improveenvironmental condition detectionVSAvoidsensor state interpretation

Core Design Contradiction:

ReliabilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent introduces a machine-readable indicium (barcode or QR code) as an intermediary between the sensor state and the user. Instead of relying directly on visual interpretation of sensor appearance, the system encodes sensor state information into a machine-readable format that can be accurately decoded by a computing device, eliminating the need for human visual interpretation while maintaining reliable environmental condition detection

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the mechanical/visual inspection system with an automated optical scanning system. A computing device uses a camera to capture images of the machine-readable indicium and automatically decodes the sensor state information, substituting human visual detection with machine-based optical recognition that is not affected by lighting conditions or visual impairments

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If machine-readable indicium is added to monitoring devices, then accurate detection is enabled for users with visual impairments, but device complexity increases

Engineering Contradiction:

Improvesensor state detectionVSAvoidmonitoring device structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The machine-readable indicium serves multiple functions: it provides accurate sensor state encoding for automated detection, maintains a compact form factor compatible with existing monitoring devices, and can be integrated into the device housing or labeling structure without requiring separate components. This multi-functionality approach minimizes the complexity increase while maximizing the ease of operation benefits

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12462127B2Assistive detection of visual states for monitoring devices

Publication Date: 2025.11.04 ZEBRA TECHNOLOGIES CORP

AI summary

A method in a computing device includes: capturing, via a camera of a computing device, an image of a monitoring device including a sensor, the sensor presenting an active one of a set of predefined visual states; detecting, within the image, a machine-readable indicium disposed on the monitoring device; determining, from the machine-readable indicium, a state detection parameter; selecting, according to the state detection parameter, at least portion of the image containing the sensor and determining the active state presented by the sensor; controlling an output assembly of the computing device to present a handling notification based on the determined active state.