Arrangement method of cobweb-like sensor array and application of cobweb-like sensor array in concrete health monitoring

A sensor array and concrete technology, which is applied to the deployment of a cobweb-like sensor array to monitor the health of concrete, can solve problems such as difficulty in providing effective information on concrete structures, failure to reflect changes in concrete structural defects, waste of human and material resources, etc. The method is flexible and changeable, the error is small, and the effect of improving the accuracy and precision

Active Publication Date: 2020-06-09
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sensors for concrete structure monitoring are still deployed based on years of on-site construction experience of engineers and other technicians. The determination of the layout points has huge blindness and redundancy. Realize the positioning and judgment of damage, but cannot reflect the real situation of concrete structure defect changes, resulting in waste of human and material resources

Method used

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  • Arrangement method of cobweb-like sensor array and application of cobweb-like sensor array in concrete health monitoring
  • Arrangement method of cobweb-like sensor array and application of cobweb-like sensor array in concrete health monitoring
  • Arrangement method of cobweb-like sensor array and application of cobweb-like sensor array in concrete health monitoring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 Shown is a schematic diagram of the structure of the bionic spider web, wherein the bionic spider web is composed of multiple horizontal and vertical lines. Wherein, the central position surrounded by the innermost horizontal line is the central area 3 , outside the central area, the quadrilateral surrounded by two adjacent horizontal lines and vertical lines is the predation area 4 . The intersection of each horizontal line and vertical line is a grid point, and each predation area has 4 grid points.

[0035] The spiderweb-like sensor array of the present invention is composed of an ultrasonic sensor and an acoustic emission sensor. The ultrasonic sensor 1 is arranged at the center of the bionic spiderweb, that is, the central area, and one or more ultrasonic sensors are arranged at the center. The acoustic emission sensor 2 is arranged at the grid point position of the bionic spider web, and each prey area is defined as an array unit, and at least one ...

Embodiment 2

[0037] The cobweb-like sensor array described in Example 1 is laid out on a concrete slab with a size of 500×500 mm and the surface is intact. The distance between adjacent horizontal lines of the imitation spider web sensor array is 200mm, and the angle between each vertical line is 90 degrees, forming a bionic spider web composed of two horizontal lines and two vertical lines, as figure 2 shown. A total of 1 ultrasonic sensor is used in the spider web-like sensor array, and the ultrasonic sensor is set at the center of the bionic spider web. Set in order from near to far. Each acoustic emission sensor is connected with a computer with signal processing function.

[0038] The sound wave is emitted by the ultrasonic sensor, and the sound wave signal is received by the acoustic emission sensors on the innermost circle and the outermost circle on the same longitudinal line. The resulting sound waves are shown in image 3 shown. It can be seen from the figure that the signa...

Embodiment 3

[0040] The cobweb-like sensor array described in Example 1 is laid out on a well-surfaced concrete road. The distance between adjacent horizontal lines of the cobweb-like sensor array is 300mm, and the angle between each vertical line is 45 degrees. The arrangement of sensors is as follows: figure 1 Described, form the bionic spider web that is made of two horizontal lines and eight vertical lines. A total of 1 ultrasonic sensor is used in the spider web-like sensor array, and the ultrasonic sensor is set at the center of the bionic spider web. Set in order from near to far. Each acoustic emission sensor is connected with a computer with signal processing function. At the same time, a comparative experiment was designed, in which 16 acoustic emission sensors were pressed Figure 5 The grid-shaped sensor array layout shown is arranged sequentially on the concrete pavement with a good surface, and the interval between each acoustic emission sensor is 300mm, and each acoustic ...

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Abstract

The invention discloses an arrangement method of a cobweb-like sensor array and application of the cobweb-like sensor array in concrete health monitoring. According to the invention, bionic knowledgeis applied, by referring to the functional principle of cobwebs, an ultrasonic sensor and an acoustic emission sensor are arranged according to a cobweb structure, and the cobweb-like sensor array isformed; the array arrangement method is flexible, variable, small in sensor use amount, large and comprehensive in monitoring area, accurate in positioning, small in errors, low in technical requirements for operators and convenient to implement, and through combination of the ultrasonic technology and the acoustic emission technology, detection of inherent defects on the surface of concrete can be achieved, and long-term monitoring of dynamic defects of the concrete can also be achieved.

Description

technical field [0001] The invention relates to a spider-web-like source location method based on ultrasonic technology, in particular to a method for laying out a spider-web-like sensor array, and a method for monitoring concrete health by using the arranged spider-web-like sensor array for source location. It belongs to the technical field of engineering non-destructive testing. Background technique [0002] Concrete is the most widely used construction material in civil engineering fields such as national infrastructure, transportation, and water conservancy. However, the service environment of concrete materials and structures is often relatively harsh. Under the coupling effect of multiple damage factors, damage accumulation will inevitably occur during the service period of decades or even hundreds of years, resulting in the mechanical properties of concrete structures. Different degrees of cracking and durability will eventually reduce the safety and service life of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/14
CPCG01N29/14G01N2291/015G01N2291/011G01N2291/0232G01N2291/0289G01N2291/106
Inventor 徐东宇张文康胡燕高广鹏程新
Owner UNIV OF JINAN
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