Elastic Wave Transmission Terminal for Buffer Overflow Control
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Solution Overview
Problem
Existing methods for acquiring and transmitting elastic wave data from structures, such as bridges, are limited by wireless communication constraints, leading to inefficiencies in data transmission and potential overflow of data in the transmission buffer memory, especially when multiple vehicles pass quickly, which can affect the accuracy and completeness of structural soundness evaluations.
Innovation Solution
A transmission terminal system that includes a receiver, communicator, and signal processor to manage data transmission based on the number of data items and elapsed time since detection, using threshold values to control when to start and stop data measurement and transmission, thereby optimizing data transfer and preventing buffer overflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless transmission is used to transmit elastic wave data, then data transmission efficiency is improved, but data loss occurs due to limited transmission speed and buffer overflow
Solution Approach 1:
The system performs preliminary classification of elastic wave data into event-related data (requiring high-priority transmission) and non-event data (lower priority) before transmission. This advance categorization ensures that critical data is transmitted first, preventing data loss due to buffer overflow while maintaining efficient wireless transmission.
Solution Approach 2:
The transmission terminal monitors buffer usage and transmission status in real-time, adjusting transmission priorities and rates based on feedback from the transmission speed and buffer occupancy. This dynamic feedback mechanism prevents buffer overflow by slowing down or prioritizing transmissions based on current system state, thereby reducing data loss while maintaining overall transmission efficiency.
2Loss of information
If all detected elastic wave data is transmitted, then measurement completeness is improved, but transmission time and energy consumption increase
Solution Approach 1:
The system extracts and transmits only the essential event-related data from the complete elastic wave dataset. By identifying and separating critical event data from routine background data, the system achieves measurement completeness for structurally significant events while dramatically reducing total transmission time and energy requirements.
Solution Approach 2:
Instead of transmitting all data uniformly, the system applies partial action by transmitting only the necessary portion (event-related data) at high priority, while handling non-critical data differently. This selective approach ensures measurement completeness for important events without the time penalty of transmitting every data point with equal urgency.
3Measurement precision
If transmission priority is given to event-related data, then data accuracy for structural evaluation is improved, but other data may be lost
Solution Approach 1:
The system segments elastic wave data into distinct categories (event-related and non-event data) with different transmission priorities. This segmentation allows critical event data to be transmitted with high priority for accurate structural evaluation, while non-critical data is handled separately, ensuring both accuracy for important measurements and reduced overall data loss through prioritized handling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively manages data transmission by controlling elastic wave measurement and wireless communication, ensuring efficient data transfer and reducing the risk of buffer overflow, thereby improving the accuracy and completeness of structural evaluations.
Implementation Method 1
a sensor that detects elastic waves generated inside a structure
Data Source
AI summary
According to one embodiment, a measurement system, and a control method capable of improving transmission efficiency of data needed to evaluate a structure. A transmission terminal according to an embodiment includes a receiver, a communicator, and a signal processor. The receiver receives elastic waves output from a sensor configured to detect the elastic waves generated inside a structure. The communicator wirelessly transmits transmission data saved in a transmission buffer memory configured to save transmission data based on the received elastic waves. The signal processor controls elastic wave measurement processing on the basis of the number of items of data saved in the transmission buffer memory and an elapse time from a clock time at which the elastic waves have been detected.