Self-powered high-sensitivity bridge stress detection system and detection method

A stress detection, high-sensitivity technology, applied in piezoelectric/electrostrictive or magnetostrictive motors, force measurement, photovoltaic power plants, etc. personal level, etc.

Pending Publication Date: 2021-09-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The labor cost of the existing manual inspection method is too high, and the detection results are limited by the manual personal level, making it difficult to obtain stable detection results
[0006] (2) The existing manual inspection method cannot detect the bridge in real time, and cannot predict the crack risk of the bridge. Due to the particularity of the bridge structure, it is difficult to directly use wired power supply for power supply

Method used

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  • Self-powered high-sensitivity bridge stress detection system and detection method
  • Self-powered high-sensitivity bridge stress detection system and detection method
  • Self-powered high-sensitivity bridge stress detection system and detection method

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Effect test

Embodiment 1

[0100] The self-powered high-sensitivity bridge stress detection method provided by the embodiment of the present invention is as follows: figure 2 As shown, as a preferred embodiment, such as image 3 As shown, the method for converting collected and stored solar energy, bridge vibration energy, and wind energy into electrical energy through the energy conversion module and the energy conversion device provided by the embodiment of the present invention includes:

[0101] S201. Obtain residual energy of various types of energy conversion devices in the bridge stress detection system;

[0102] S202, pre-setting the maximum replacement time interval of the equipment, and determining the earliest replacement time of the equipment;

[0103] S203. Obtain the required power supply of multiple loads of the bridge stress detection system.

[0104] Obtaining the residual energy E(t) of multiple types of energy conversion devices in the bridge stress detection system provided by the...

Embodiment 2

[0116] The self-powered high-sensitivity bridge stress detection method provided by the embodiment of the present invention is as follows: figure 2 As shown, as a preferred embodiment, such as Figure 4 As shown, the method provided by the embodiment of the present invention utilizes the central processing unit to coordinate and control the normal operation of each module of the self-powered high-sensitivity bridge stress detection system through the central control and processing module, and the method for ensuring the detection accuracy of the bridge stress includes :

[0117] S301, calculating an error value according to the input stress data, and calculating an error change rate according to the error value;

[0118] S302, receiving the error value and the error change rate, and using the fuzzy rules to perform adaptive tuning on the PID parameters of the PID controller, and output the change amount of the PID parameters;

[0119] S303, receiving the error value and err...

Embodiment 3

[0130] The self-powered high-sensitivity bridge stress detection method provided by the embodiment of the present invention is as follows: figure 2 As shown, as a preferred embodiment, such as Figure 5 As shown, the method for real-time detection of the stress of the bridge by using the stress detection device through the stress detection module provided by the embodiment of the present invention includes:

[0131] S401, amplifying the initial electrical signal to obtain the excitation electrical signal; sending the excitation electrical signal to the ultrasonic transmitting probe;

[0132] S402. Control the ultrasonic transmitting probe to transmit ultrasonic signals to the bridge, and determine the transmitting time of the ultrasonic signals;

[0133] S403. Control the at least one ultrasonic receiving probe to receive the ultrasonic critical longitudinal wave signal, and determine the receiving time for each ultrasonic receiving probe in the at least one ultrasonic recei...

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Abstract

The invention belongs to the technical field of bridge stress detection, and discloses a self-powered high-sensitivity bridge stress detection system and detection method. The self-powered high-sensitivity bridge stress detection system comprises a comprehensive environment energy acquisition module, an energy collection and storage module, an energy conversion module, a signal processing and sending module, a stress estimation module, a stress detection module, a stress data acquisition module, a data transmission module, a mobile terminal module and a central control and processing module. Solar energy, bridge vibration energy and wind energy are converted into electric energy through the stress detection system, the electric energy is stored through the energy collection and storage module, self power supply of the system is achieved, and the problem of supplying power to the bridge stress detection system through wired power on a bridge is solved; and the stress sensor adopts graphene as a sensitive grid material, so that the capability of sensing the vibration change of the bridge can be improved, and the stress sensor is connected with the mobile terminal module, so that maintenance personnel can conveniently and remotely monitor the safety condition of the bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge stress detection, and in particular relates to a self-powered high-sensitivity bridge stress detection system and a detection method. Background technique [0002] At present, bridge safety is a key issue related to national security, people's lives and property safety. With the development of the economy, bridge construction has become more frequent and the scale of construction has become larger and larger. Due to various reasons, the frequency of bridge accidents has also become higher and higher in recent years, resulting in a greater number of bridge accidents. The factors are also more complicated, partly because of bridge design and construction problems, and partly because of the long service life of the bridge, the bridge needs to bear the load for a long time, and the aging and damage of bridge materials are inevitable. [0003] Routine periodic inspections of bridge inspections include ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/25H02N2/18H02S10/12H02S10/20
CPCG01L1/255H02S10/12H02S10/20H02N2/186Y02E70/30Y02E10/50
Inventor 刘海鹏刘彦苏斌张向永关慧元彭庭睿
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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