Biological Signal Synchronization Using Wireless Trigger Sampling
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Solution Overview
Problem
Existing biological signal measurement systems face challenges in reliably synchronizing stimulation signals and biological signals due to communication delays between devices, which hinders accurate data analysis.
Innovation Solution
A biological signal measurement system that includes a biological signal measurement apparatus and a data analysis apparatus, utilizing a trigger signal obtaining portion, a synchronous sampling portion, and wireless communication to synchronize and sample trigger signals and biological signals, ensuring synchronization even in the presence of communication delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If wireless communication is used between the biological signal measurement apparatus and the data analysis apparatus, then data transmission capability is improved, but synchronization accuracy between stimulation signal and biological signal deteriorates due to communication delays
Solution Approach 1:
The system performs preliminary actions by having the measurement apparatus generate and send a trigger signal corresponding to the stimulation signal before the actual biological signal measurement. This trigger signal serves as a reference that allows the data analysis apparatus to synchronize the biological signal with the stimulation signal timing, compensating for wireless communication delays.
Solution Approach 2:
A trigger signal acts as an intermediary between the stimulation signal and the biological signal. The trigger signal is sent through the wireless communication channel to establish a time reference, allowing the system to compensate for communication delays and maintain synchronization accuracy without requiring the biological signal itself to be transmitted through the delayed channel.
2Adaptability or versatility
If separate devices are used for stimulation signal generation and biological signal measurement, then device functionality is improved, but synchronization reliability deteriorates due to independent timing generation
Solution Approach 1:
The system implements feedback by having the measurement apparatus send back a trigger signal that corresponds to the stimulation signal timing. This feedback mechanism allows the data analysis apparatus to adjust and synchronize the timing of the biological signal with the stimulation signal, ensuring reliable synchronization despite using separate devices with independent timing generation.
Solution Approach 2:
The measurement apparatus performs a preliminary action by generating and transmitting a trigger signal that establishes the timing reference before the biological signal analysis is performed. This preliminary timing establishment enables reliable synchronization between the stimulation and biological signals across separate devices.
Data Source
AI summary
A biological signal measurement system includes a biological signal measurement apparatus and a data analysis apparatus. The data analysis apparatus generates a stimulation signal and wirelessly transmits the stimulation signal to the measurement apparatus. The measurement apparatus measures a biological signal of a subject responding to the stimulation. The measurement apparatus acquires a trigger signal corresponding to the stimulation signal, and utilizes a synchronous sampling circuit to synchronize and sample the trigger signal and the biological signal, generating a synchronously sampled data set. The measurement apparatus transmits the synchronously sampled data set to the data analysis apparatus. The data processing apparatus performs data processing on the received biological signal and trigger signal within the synchronously sampled data set to time-align the biological signal with the trigger signal.