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Integrated three-axis acquisition and storage device for low-frequency environment vibration signals

A vibration signal and storage device technology, applied in the direction of using electrical devices, measuring devices, instruments, etc., can solve the problems of wide frequency band range, inability to apply ultra-low frequency weak environmental vibration signal collection, and lack of low frequency resolution, etc., to achieve integrity Good, avoid wire equipment connection and wiring, and have a wide range of applications

Pending Publication Date: 2021-01-08
尹涛
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The paper "Design of a Three-axis Vibration Sensor" published by Jiang Zhiguo, Chen Yuling, Shi Yanfeng and others ("Sensors and Microsystems", Volume 34, No. 5, 2015, 106-109) only designed a three-axis sensor, without Other ancillary equipment, and its frequency band range is too wide, does not have low-frequency resolution, and cannot be applied to ultra-low frequency weak environmental vibration signal collection

Method used

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  • Integrated three-axis acquisition and storage device for low-frequency environment vibration signals
  • Integrated three-axis acquisition and storage device for low-frequency environment vibration signals
  • Integrated three-axis acquisition and storage device for low-frequency environment vibration signals

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Embodiment

[0049]In order to verify the actual application performance of the device, the device was used to measure the vibration response signal of a long-span steel structure footbridge in Wuhan under environmental excitation according to the above operation steps. The measurement point was selected near the middle of the bridge and the sampling The frequency was set to 125Hz, and the continuous recording was carried out for about 12 minutes, and the complex modal indicator function (CMIF) analysis was performed on the three-channel measurement data exported by the device. The analysis results are as followsFigure 4Shown. It can be clearly seen from the figure that the low-frequency components of the signal are quite rich, the low-frequency peak energy is clear, and the signal-to-noise ratio is high, revealing the excellent low-frequency sensitivity and resolution of the device, indicating that the device can be a large-scale civil engineering structure Long-term health monitoring and seism...

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Abstract

The invention discloses an integrated three-axis acquisition and storage device for low-frequency environment vibration signals. The device is assembled in a modular manner, and each functional part is relatively independent. The device is packaged into an integral structure, is internally provided with a plurality of sensors, integrates three-axis sensing, acquisition, storage and power supply, and is used for realizing synchronous acquisition of weak environment vibration signals in three orthogonal directions. The device has the advantages of being small in size, light in weight, movable and portable, the single device can independently complete the whole process of data collection at the designated measuring point of a structure, no human intervention is needed except for moving the measuring point in the testing process, complex wire equipment connection wiring and consumption of a large number of related human resources in the field testing process are effectively avoided, and meanwhile, the equipment can realize unattended long-term monitoring under the condition of an external power supply.

Description

Technical field[0001]The invention belongs to the technical field of civil engineering, relates to environmental signal monitoring, and specifically relates to an integrated three-axis acquisition and storage device for low-frequency environmental vibration signals.Background technique[0002]Large-scale civil engineering structures (such as long-span bridges, super high-rise buildings, etc.) are susceptible to fatigue damage due to various factors during the service period. When the damage accumulates to a certain degree, it may cause the overall or partial damage of the structure and lead to catastrophic The accident occurred, causing heavy casualties and huge economic and property losses. Therefore, it is urgent to implement the health status monitoring of large-scale civil engineering structures in order to effectively assess their safety status in time.[0003]The data collection and storage system is the core component of the overall structural health monitoring system. Obtaining ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H11/08
CPCG01H11/08
Inventor 尹涛
Owner 尹涛
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