Single Bluetooth Device Indoor Positioning via Mobile Compass

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Solution Overview

Problem

Conventional Bluetooth devices require multiple devices for accurate indoor positioning, leading to increased implementation costs and interference issues, which hinder precise push notification services, especially in environments needing multi-directional positioning.

Innovation Solution

A system utilizing a single Bluetooth device, a server, and a user mobile device with an electronic compass, acceleration sensor, and signal intensity detection module, where the mobile device transmits detection angles and signal intensity to the server to determine relative angles and provide targeted push notifications based on location data and signal variations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If multiple Bluetooth devices are used for positioning, then positioning coverage is improved, but implementation cost increases and signal interference occurs

Engineering Contradiction:

Improvepositioning precisionVSAvoidnumber of Bluetooth devices

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent transitions from using multiple Bluetooth devices in space to using a single Bluetooth device combined with angular measurement in a different dimension. The mobile device's electronic compass and acceleration sensor measure the angle of the Bluetooth signal relative to the device's orientation, adding an angular dimension to the positioning calculation. This allows precise location determination without deploying multiple Bluetooth devices throughout the area.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Measurement precision

If multiple Bluetooth devices are used for positioning, then positioning coverage is improved, but signal interference increases

Engineering Contradiction:

Improvepositioning precisionVSAvoidsignal interference

Core Design Contradiction:

Measurement precisionVSObject-generated harmful factors

Solution Approach 1:

The patent extracts the angular measurement function from the Bluetooth device itself and places it in the mobile device. By using the mobile device's electronic compass and acceleration sensor to measure the angle of the received Bluetooth signal, the system eliminates the need for multiple Bluetooth devices, thereby removing the source of signal interference while maintaining positioning precision.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of manufacture

If a single Bluetooth device is used, then implementation cost is reduced, but positioning precision deteriorates

Engineering Contradiction:

Improveimplementation costVSAvoidpositioning precision

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent changes the measurement parameters from purely distance-based (signal strength) to include angular information. By measuring the angle between the mobile device's forward direction and the Bluetooth device using the electronic compass and acceleration sensor, the system achieves precise positioning with a single Bluetooth device. The server calculates the user's location by combining the known Bluetooth device location, the measured angle, and the signal intensity, providing accurate positioning without requiring multiple devices.

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

Enables precise multi-directional push notification services using a single Bluetooth device, reducing costs and interference, and allowing for accurate user positioning without the need for multiple devices.

Implementation Method 1

The user mobile device has an electronic compass and an acceleration sensor for obtaining a detection angle

Methodology Applied

Scientific EffectElectronic compass sensing: Magnetism

Implementation Method 2

The user mobile device has an electronic compass and an acceleration sensor for obtaining a detection angle

Methodology Applied

Scientific EffectAcceleration sensing: Accelerometer

Implementation Method 3

The user mobile device has a signal intensity detection module for obtaining the intensity of the Bluetooth signal

Methodology Applied

Scientific EffectSignal intensity detection: Electromagnetic Induction

Data Source

PatentUS9788142B2System of location push notification service, user mobile device, and method of location push notification service

Publication Date: 2017.10.10 INSTITUTE FOR INFORMATION INDUSTRY

AI summary

A system of location push notification service is provided. The system comprises a Bluetooth device, a server and a user mobile device. The server stores a location data and a standard angle corresponding to the Bluetooth device. The user mobile device linked to the server via a communication network has an electronic compass and an acceleration sensor for obtaining a detection angle, and a signal intensity detection module for obtaining the intensity of the Bluetooth signal. The user mobile device transmits the detection angle and the intensity of the Bluetooth signal to the server when the user mobile device senses the Bluetooth signal. The server obtains a relative angle of the user mobile device corresponding to the Bluetooth device, and determines a service information pushed from the server to the user mobile device according to the relative angle and variations in the intensity of the Bluetooth signal.