Neck-Worn Inertial Sensing for Accurate Behavior Detection
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Solution Overview
Problem
Existing methods for detecting user behaviors in communication settings, such as nodding or head movements, are limited by spatial restrictions and are not suitable for long-term office use due to the need for multiple sensors attached to different body parts.
Innovation Solution
A wearable activity sensor system comprising a first inertial sensor attached to the body and a second inertial sensor attached to the neck, which uses accelerometers, angular velocity sensors, and geomagnetic sensors to detect various behaviors and postures without spatial restrictions, allowing for continuous monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are attached to different body parts to detect user behaviors, then measurement precision is improved, but device complexity and ease of operation deteriorate due to spatial restrictions and difficulty in long-term use
Solution Approach 1:
The patent combines multiple inertial sensors (accelerometer, angular velocity sensor, geomagnetic sensor) into a single integrated sensor device that contacts only the neck. This merging approach maintains comprehensive behavior detection capability while eliminating the need to attach multiple separate sensors to different body parts, thereby reducing device complexity and improving ease of operation for long-term monitoring.
Solution Approach 2:
The sensor device contacts only the neck but performs multiple detection functions by utilizing signals from different inertial sensors. The device can detect nodding, head shaking, facial direction, and posture changes simultaneously, making a single-location sensor system universally capable of detecting various user behaviors without requiring multiple attachment points.
2Measurement precision
If multiple sensors are attached to different body parts to detect user behaviors, then measurement precision is improved, but ease of operation worsens due to the need for multiple attachment points
Solution Approach 1:
The patent merges multiple sensor functions into a single device that contacts only the neck, eliminating the operational burden of attaching multiple sensors to different body parts. The integrated device maintains comprehensive detection capability while significantly improving ease of operation for long-term monitoring.
Solution Approach 2:
The sensor device is designed to be worn like a necklace, allowing users to easily attach and detach it without requiring assistance or complex procedures. This self-service design enables users to independently operate the device for continuous monitoring, greatly improving ease of operation compared to multi-attachment-point systems.
3Ease of operation
If a single sensor contacts only the neck, then ease of operation is improved, but measurement precision may deteriorate due to limited detection scope
Solution Approach 1:
The neck-mounted sensor device achieves multi-functional detection capability by combining signals from accelerometer, angular velocity sensor, and geomagnetic sensor. This allows the single-location device to accurately detect various behaviors including nodding, head shaking, facial direction, and posture changes, maintaining measurement precision despite limited contact points.
Solution Approach 2:
The patent replaces mechanical multi-point attachment systems with a necklace-style wearable that contacts only the neck. By substituting the mechanical constraint of multiple attachment points with the flexibility of neck-mounted sensing, the system maintains ease of operation while using sophisticated signal processing to preserve measurement precision across multiple behavior types.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system accurately detects behaviors like nodding, head shaking, and posture changes, enhancing communication efficiency and psychological safety by providing real-time feedback on user engagement.
Implementation Method 1
a first inertial sensor that contacts a body of a user, a second inertial sensor that contacts a neck of the user
Implementation Method 2
a first inertial sensor that contacts a body of a user, a second inertial sensor that contacts a neck of the user
Implementation Method 3
a first inertial sensor that contacts a body of a user, a second inertial sensor that contacts a neck of the user
Data Source
AI summary
A sensor device includes a first inertial sensor that contacts a body of a user, a second inertial sensor that contacts a neck of the user, and circuitry that presumes a behavior of the user based on a first signal detected by the first inertial sensor and a second signal detected by the second inertial sensor.