Distributed strain sensor system based on pulse telescopic processing technology

Abstract

The invention relates to a distributed strain sensor system based on a pulse stretching treatment technology. The distributed strain sensor system comprises a signal generating and processing module and a sensor distribution module, wherein the signal generating and processing module comprises signal transceiving and processing equipment, a low-noise amplifier, a frequency mixer, a low-pass filter and a computer terminal; the sensor distribution module comprises a first sensor subunit to a nth sensor subunit which are cascaded; the signal transceiving and processing equipment is connected with the sensor distribution module; the sensor distribution module is connected with the low-noise amplifier; the low-noise amplifier and the signal transceiving and processing equipment are respectively connected with the frequency mixer; the frequency mixer is connected with the low-pass filter; the low-pass filter is connected with the signal transceiving and processing equipment; the signal transceiving and processing equipment is connected with the computer terminal. The invention provides the novel distributed strain sensor system which is steady, embedded and low in cost.

Description

technical field [0001] The invention relates to a distributed strain sensor system based on pulse telescopic processing technology. Background technique [0002] Hulls, aircraft propellers and other large structures, once they are built and put into use, their structural conditions will gradually deteriorate with various general continuous loads, occasional overload loads or extremely harsh environmental conditions. Changes in the nature of materials within such a structure can greatly affect the performance of the structure, and it is often impossible to know in advance when failure will occur. Therefore, a monitoring system that can be fast, reliable and does not damage the original structure is extremely important. Strain sensing monitoring technology came into being. The strain changes in various parts of the structure are monitored by strain sensors, and after data processing and parameter analysis, the performance of the structure can be evaluated and the remaining f...

AI Technical Summary

Problems solved by technology

[0004] However, the existing strain sensor systems have the following technical difficulties: (1) the sensors used require multiple metal wires to collect signals

Especially for distributed sensing systems, as the number of sensors increases, the system will become very large and complex

(2) The sensors and metal wires used are easily affected by electromagnetic interference

These limitations make existing technologies bulky, poorly immune to interference, and prone to failure

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