Acoustic Relative Angle Determination for Intelligent Devices
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Solution Overview
Problem
Current location services for intelligent devices, particularly in small spaces, face challenges with low accuracy and reliability due to the limitations of Global Navigation Satellite System (GNSS) and other technologies like WiFi and Bluetooth, which struggle indoors and in small scenarios.
Innovation Solution
A method and system using sound detection modules in intelligent devices to determine a relative angle by detecting sound signals, calculating the time difference between signal receptions, and using the distance and time difference to calculate the relative angle, without requiring additional hardware, ensuring accurate and reliable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GNSS is used for positioning, then positioning coverage is provided, but positioning accuracy deteriorates and indoor positioning becomes unavailable
Solution Approach 1:
The patent replaces electromagnetic-based positioning systems (GNSS, WiFi, Bluetooth) with an acoustic-based positioning system using sound detection modules. This substitution enables reliable indoor positioning by utilizing sound wave propagation characteristics, achieving both positioning availability and improved accuracy in indoor environments where electromagnetic signals fail.
Solution Approach 2:
The patent changes the fundamental parameter used for positioning from electromagnetic signal strength to sound signal time difference. By measuring the time difference of sound signal arrival at multiple detection modules and converting it to distance differences, the system achieves accurate positioning without relying on electromagnetic signals, thereby resolving the contradiction between availability and accuracy.
2Reliability
If WiFi or Bluetooth technology is used for positioning, then positioning function is provided, but positioning accuracy deteriorates and repeated testing is required
Solution Approach 1:
The patent substitutes WiFi and Bluetooth electromagnetic signal-based positioning with an acoustic positioning system using sound detection modules. This replacement eliminates the need for repeated testing and environmental calibration required by electromagnetic methods, providing both reliable positioning function and improved accuracy through direct sound signal time difference measurement.
3Measurement precision
If additional hardware is added to improve positioning accuracy, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts the sound detection capability from specialized acoustic positioning hardware and integrates it into existing intelligent devices using standard microphones or sound detection modules. This extraction approach achieves high positioning accuracy without adding complex dedicated hardware, as the sound detection modules can be implemented using existing components in smartphones and other intelligent devices.
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 enables accurate and universal relative angle positioning between intelligent devices, ensuring interoperability and compatibility across different manufacturers, and allows for precise angle calculation even in small spaces without the need for extra hardware, enhancing the reliability of location services.
Implementation Method 1
a first sound detection module to detect a first sound signal sent by another intelligent device and directly reaching the first sound detection module
Data Source
AI summary
The present application provides a method, device and system for determining a relative angle between intelligent devices, and intelligent devices. The method is applicable to a first intelligent device. The first intelligent device includes a first sound detection module and a second sound detection module. The relative angle between intelligent devices can be determined quickly, simply, conveniently and accurately.