Dual-Communicator Sensor Transmission for Accurate Time Estimation
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Solution Overview
Problem
Existing wireless transmission methods for structural health monitoring face challenges in maintaining time estimation accuracy due to the need for data compression and the difficulty in transmitting large amounts of waveform data, especially when dealing with multiple sensors and long transmission periods.
Innovation Solution
A sensor system with a transmission terminal that uses two communicators operating at different frequencies to separately transmit time information and waveform data wirelessly, allowing for accurate time estimation by correlating data based on event sensing times and transmission times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If waveform data is transmitted wirelessly using a single communicator, then data transmission is simplified, but time estimation accuracy deteriorates due to interference and synchronization issues
Solution Approach 1:
The transmission terminal divides the transmission function into two separate communicators: one dedicated to transmitting time information and another dedicated to transmitting waveform data. This segmentation prevents interference between time-critical and data-intensive transmissions, maintaining time estimation accuracy while managing system complexity.
Solution Approach 2:
The patent introduces an event identifier as an intermediary element that links time information and waveform data across the two separate communicators. This intermediary enables accurate correlation and time estimation without requiring direct simultaneous transmission of both data types through the same channel.
2Quantity of substance
If data compression is applied to waveform data, then transmission bandwidth is reduced, but time estimation accuracy deteriorates due to loss of detailed waveform information
Solution Approach 1:
The system separates time information transmission from waveform data transmission, allowing waveform data to be compressed or transmitted at lower priority without affecting time estimation accuracy. The dedicated time information channel ensures precise timing data is transmitted without compression losses.
Solution Approach 2:
The patent extracts time information from the waveform data and transmits it separately through a dedicated communicator. This extraction allows the main waveform data to be compressed or transmitted at reduced bandwidth while the critical time information maintains full precision through separate transmission.
3Device complexity
If multiple sensors transmit data simultaneously through a single communicator, then system complexity is reduced, but time synchronization deteriorates due to communication conflicts
Solution Approach 1:
The system segments the communication channel into two separate communicators, allowing multiple sensors to transmit time information and waveform data simultaneously without conflicts. This segmentation eliminates communication collisions and ensures reliable time synchronization even with multiple concurrent transmissions.
Data Source
AI summary
According to one embodiment, a sensor system, a transmission terminal, and a transmission method that can curb a decrease in time estimation accuracy are provided. The sensor system includes one more sensors, one or more transmission terminals, and a collection apparatus. The one or more transmission terminals include a first communicator and a second communicator. The first communicator transmits first transmission data including time information to be used for time estimation to the collection apparatus in a wireless manner. The second communicator transmits second transmission data including information acquired on the basis of the physical quantity sensed by the one or more sensors to the collection apparatus at a frequency different from a frequency used by the first communicator in a wireless manner. The collection apparatus includes a reception time determiner and a time information processor. The reception time determiner determines a plurality of reception times of a plurality of pieces of first transmission data transmitted from the first communicator. The time information processor performs the time estimation on the basis of the plurality of pieces of first transmission data and the plurality of reception times.