Bluetooth Sensor Synchronization for Accurate Spatial Location
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Synchronizing wireless sensor measurements across multiple Bluetooth devices is challenging, making it difficult to accurately determine the spatial location of movable objects like a key fob within an automobile.
Innovation Solution
A central device transmits periodic advertisements with synchronized measurement information to coordinate wireless sensor devices, enabling them to perform measurements at the same time and transmit data back to the central device using Bluetooth's Periodic Advertisement with Response (PAwR) feature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wireless sensor devices operate independently without synchronization, then device complexity and communication overhead are reduced, but measurement accuracy for spatial location determination deteriorates
Solution Approach 1:
The system uses periodic advertisements transmitted at regular intervals to trigger synchronized measurements. The central device sends periodic advertisement packets that contain measurement timing information, causing all sensor devices to perform measurements at the same periodic intervals, thereby achieving synchronization without continuous complex coordination
Solution Approach 2:
The periodic advertisement packets include pre-configured measurement timing information and parameters before the actual measurement occurs. This allows sensor devices to prepare and schedule their measurements in advance based on the received timing information, ensuring synchronized execution without real-time complex coordination
2Measurement precision
If physical connections are used to synchronize sensors, then measurement synchronization is achieved, but system cost and installation complexity increase
Solution Approach 1:
The system replaces physical wired connections with wireless Bluetooth communication for synchronization. The central device transmits synchronization commands and measurement timing information wirelessly to sensor devices, eliminating the need for physical connection infrastructure while maintaining synchronized measurement capability
Solution Approach 2:
The periodic advertisement packets serve as an intermediary carrier that transmits synchronization timing and measurement parameters from the central device to sensor devices. This intermediary mechanism enables coordinated synchronization without requiring direct physical connections between devices
Data Source
AI summary
A system and method of performing synchronized measurements using wireless sensor devices is disclosed. A central device transmits a periodic advertisement that includes a special command instructing the wireless sensor devices to perform a measurement. Further, the periodic advertisement also includes measurement timing which defines the time that the measurement is to be performed. Additionally, the periodic advertisement may include measurement parameters, which provide information about the measurement to be performed. A periodic advertisement with response is then used to allow all of the wireless sensor devices to transmit their respective measurement data back to the central device. This may be used to perform one synchronized measurement or a plurality of measurements.