Rotation Detection Using Angular Velocity Sensors

Solution Overview

Problem

Existing rotation detection devices struggle to accurately detect the rotation angle of rotating bodies, such as doors and lids, due to reliance on acceleration sensors which can introduce errors and inaccuracies.

Innovation Solution

The proposed solution involves a rotation detection device equipped with an angular velocity sensor and a processor that calculates the rotation angle before and after a rotation operation, based on the detected angular velocity, to enhance accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If an acceleration sensor is used to detect rotation angle, then the device structure is simple, but the measurement precision deteriorates

Engineering Contradiction:

Improvedevice structureVSAvoidrotation angle detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent replaces the acceleration sensor (mechanical/inertial measurement system) with a magnetic field-based detection system. A magnet is attached to the rotating body and a magnetic sensor detects its position, substituting mechanical acceleration measurement with magnetic field interaction for more accurate rotation angle detection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the detection parameter from acceleration (indirect measurement requiring calculation) to magnetic field position (direct measurement). By detecting the position of a magnet attached to the rotating body through magnetic field interactions, the system directly obtains rotation angle information with higher precision.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If an acceleration sensor is used to detect rotation angle, then the device complexity is low, but the reliability deteriorates

Engineering Contradiction:

Improvedevice structureVSAvoidrotation angle detection accuracy

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent replaces the acceleration sensor (mechanical/inertial measurement system) with a magnetic field-based detection system. A magnet is attached to the rotating body and a magnetic sensor detects its position, substituting mechanical acceleration measurement with magnetic field interaction for more accurate rotation angle detection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If angular velocity sensor is used to calculate rotation angle, then the measurement precision improves, but the device complexity increases

Engineering Contradiction:

Improverotation angle detection accuracyVSAvoiddevice structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent uses magnetic sensors (detecting magnetic field interactions) to replace complex mechanical measurement systems. The magnet and magnetic sensor configuration provides direct position detection without requiring complex calculation from angular velocity data.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the detection parameter from acceleration (indirect measurement requiring calculation) to magnetic field position (direct measurement). By detecting the position of a magnet attached to the rotating body through magnetic field interactions, the system directly obtains rotation angle information with higher precision.

Inventive Principle:

Principle #35Parameter changes

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

This approach allows for more accurate detection of the rotation angle, effectively addressing the limitations of previous technologies and ensuring reliable state determination of rotating bodies.

Implementation Method 1

an angular velocity sensor configured to be attached to a rotating body that rotates and detect an angular velocity of the rotating body

Methodology Applied

Scientific EffectAngular velocity detection: Gyroscope

Data Source

PatentUS20250124751A1Rotation Detection Devices, Method, And Program

Publication Date: 2025.04.17 BITKEY INC

AI summary

A rotation detection device includes an angular velocity sensor attached to a rotating body that rotates and configured to detect an angular velocity of the rotating body, and at least one processor configured to perform a control based on the angular velocity detected by the angular velocity sensor, in which the at least one processor is configured to perform processing for calculating a first angle of the rotating body before a rotation operation is performed on the rotating body and a second angle of the rotating body after the rotation operation is performed on the rotating body based on the angular velocity sensor.