Multi-Sensor Module Synchronization for Accurate Measurement Timing
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Solution Overview
Problem
Existing sensor modules fail to synchronize measurement data from multiple sensor devices accurately, leading to temporal deviations in data acquisition and transmission, which affects the accuracy of measurements such as posture information and movement data in applications like vehicle navigation.
Innovation Solution
A sensor module design that includes a microcontroller and interface circuits for multiple sensor devices, utilizing an external synchronization signal to synchronize data acquisition and transmission, ensuring that measurement data from all devices is acquired and transmitted at a common timing, thereby reducing temporal fluctuations and improving data accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement data is transmitted in data transmission order without synchronization, then device complexity is reduced, but measurement precision deteriorates due to temporal deviations
Solution Approach 1:
An external synchronization signal is introduced as an intermediary to coordinate the transmission timing of measurement data from multiple sensor devices. The synchronization signal serves as a mediator that aligns the data transmission moments across different devices, ensuring temporal consistency without requiring complex internal synchronization mechanisms within each device.
Solution Approach 2:
The system employs periodic synchronization signals to establish regular intervals for data transmission. By using periodic external synchronization signals, the system ensures that measurement data from multiple sensor devices is transmitted at synchronized time points, creating a rhythmic and predictable data acquisition pattern that improves measurement precision.
2Reliability
If data acquisition timing is not synchronized across multiple sensor devices, then ease of operation is improved, but reliability deteriorates due to temporal fluctuations in measurement data
Solution Approach 1:
The external synchronization signal acts as a mediator that coordinates data acquisition timing across multiple sensor devices. This intermediary signal ensures that all devices acquire and transmit data at synchronized moments, improving reliability and consistency of measurement data without requiring complex inter-device communication or coordination protocols.
Solution Approach 2:
The system performs preliminary synchronization by establishing external synchronization signal timing before data acquisition begins. This preliminary action ensures that all sensor devices are pre-aligned to the same timing reference, so that when data acquisition occurs, temporal consistency is already guaranteed, improving reliability without adding operational complexity during actual measurement.
Data Source
AI summary
A sensor module includes a first sensor device that outputs first measurement data from a first measurement circuit receiving a signal from a first sensor element and performing a measurement process, a second sensor device that outputs a second measurement circuit receiving a signal from a second sensor element and performing a measurement process, and a microcontroller that receives the first measurement data and the second measurement data, in which the first sensor device includes a first terminal that is used for input of an external synchronization signal or a synchronization signal which is a signal based on the external synchronization signal, and input or output of a communication signal, and the second sensor device includes a second terminal that is used for input of the synchronization signal, and input or output of the communication signal.