Location-Triggered Analogue Sampling for Noise-Resistant Data Acquisition
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Solution Overview
Problem
Current sampling systems for measuring physiological parameters, such as blood glucose levels, face challenges due to invasive methods, inaccuracies caused by skin variability, and noise introduced by asynchronous data acquisition and motion control, leading to reduced accuracy and repeatability.
Innovation Solution
A signal sample trigger apparatus that generates a trigger signal based on location increment information, allowing for precise synchronization of analogue signal sampling with the scanning system's position, reducing the need for time-based correlation and improving measurement fidelity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If time-based sampling is used for data acquisition, then the sampling process is simple and straightforward, but noise is introduced and accuracy is reduced due to asynchronous data acquisition and motion control
Solution Approach 1:
The system uses a trigger signal that is generated based on location increment information from the scanning system. This trigger signal feeds back to the data acquisition system to synchronize sampling with the scanning position, eliminating the noise introduced by asynchronous operation while maintaining system simplicity
Solution Approach 2:
A trigger signal acts as an intermediary between the scanning system and the data acquisition system. This intermediary synchronizes the two systems without requiring complex direct coordination, thereby improving measurement accuracy while avoiding synchronization complexity
2Measurement precision
If location increment information is used to generate trigger signals, then measurement accuracy is improved by direct association of location with sampled data, but the device complexity increases
Solution Approach 1:
The scanning system generates its own trigger signals using its location increment information. This self-service approach allows the scanning system to directly control the data acquisition timing without external intervention, improving measurement accuracy while keeping the trigger signal generation simple and integrated
3Reliability
If frequent sampling is performed to capture rapid changes in physiological parameters, then measurement completeness is improved, but the amount of data to be processed and stored increases significantly
Solution Approach 1:
Instead of continuous frequent sampling, the system performs partial sampling only when triggered by location increment information. This approach captures sufficient data to represent the physiological parameter changes while significantly reducing the overall data volume that needs to be processed and stored
4Reliability
If precise position and velocity control is implemented in the scanning system, then measurement repeatability is improved, but the device complexity and control requirements increase
Solution Approach 1:
The system replaces complex mechanical position and velocity control with a trigger signal generation approach based on location increment information. This substitution maintains measurement repeatability by ensuring consistent sampling at regular location intervals while avoiding the complexity of precise motion control systems
Data Source
AI summary
A signal sample trigger apparatus (206) comprises an input (302, 304), a processing resource (300, 500) coupled to the input (302, 304), and an output (306) coupled to the processing resource (300, 500). The processing resource (300, 500) is arranged to generate, when in use, a trigger signal (400, 600) in response to location increment information. The location increment information (402, 404, 602, 604) is received via the input (302, 304), and the trigger signal (400, 600) is provided via the output for triggering execution of a sample of an analogue signal.