阅读说明：本技术 一种预应力混凝土安全壳结构损伤识别系统和方法 (System and method for identifying structural damage of prestressed concrete containment ) 是由 叶苏疏 颜彦 于晓梅 任飞其 王波 于 2020-12-25 设计创作，主要内容包括：本发明公开了一种预应力混凝土安全壳结构损伤识别系统和方法,所述系统包括声拾取传感器、通用数据采集设备、结构损伤识别软件；所述声拾取传感器具有较宽的频响范围和高灵敏度,可直接输出电压信号,与所述通用数采设备相匹配；所述通用数据采集设备具有同步处理多通道电压信号的功能；所述结构损伤识别软件整合了针对预应力混凝土安全壳的损伤识别算法,通过读取所述通用数据采集设备信号计算输出损伤类型与损伤具体位置。本发明能够实时、准确地识别出预应力安全壳的结构损伤类型与损伤具体位置,为预应力安全壳寿命评价工作提供基础数据。(The invention discloses a prestressed concrete containment structure damage identification system and a method, wherein the system comprises an acoustic pickup sensor, a universal data acquisition device and structure damage identification software; the acoustic pickup sensor has a wider frequency response range and high sensitivity, can directly output a voltage signal and is matched with the general data acquisition equipment; the universal data acquisition equipment has the function of synchronously processing multi-channel voltage signals; the structural damage identification software integrates a damage identification algorithm for the prestressed concrete containment, and calculates and outputs damage types and damage specific positions by reading signals of the universal data acquisition equipment. The method can accurately identify the structural damage type and the specific damage position of the prestressed containment vessel in real time, and provides basic data for the life evaluation work of the prestressed containment vessel.)

1. A prestressed concrete containment structure damage identification system is characterized by comprising an acoustic pickup sensor, a universal data acquisition device and structure damage identification software;

the acoustic pickup sensor has a wider frequency response range and high sensitivity, can directly output a voltage signal and is matched with the general data acquisition equipment;

the universal data acquisition equipment has the function of synchronously processing multi-channel voltage signals;

the structural damage identification software integrates a damage identification algorithm for the prestressed concrete containment, and calculates and outputs damage types and damage specific positions by reading signals of the universal data acquisition equipment.

2. A prestressed concrete containment structure damage identification method is characterized by comprising a prestressed concrete containment structure damage identification system;

the method comprises the steps that a plurality of sound pickup sensors are arranged on the surface of a prestressed concrete containment shell, the sound pickup sensors capture sound signals of specific frequency bands emitted when different materials of the prestressed concrete containment shell are damaged, the sound signals are collected to the universal data collection equipment, and the damage type and the specific damage position are calculated and output through the structural damage recognition software.

Technical Field

The invention relates to the technical field of identification of structural damage of a prestressed concrete containment, in particular to the technical field of identification of structural damage through acoustic signals.

Background

The existing monitoring method of the prestressed concrete containment mainly comprises the steps of arranging a sensor on the surface of the prestressed concrete containment to acquire displacement, strain and temperature data of the containment during a pressure test, and then manually judging the state of a structure. The monitoring method has a large demand on the number of sensors, and the type and specific position of the structural damage cannot be accurately identified.

Disclosure of Invention

The invention provides a prestressed concrete containment structure damage identification system and method based on an acoustic pickup technology according to the defects of the prior art.

A prestressed concrete containment structure damage identification system comprises an acoustic pickup sensor, a universal data acquisition device and structure damage identification software;

the acoustic pickup sensor has a wider frequency response range and high sensitivity, can directly output a voltage signal and is matched with the general data acquisition equipment;

the universal data acquisition equipment has the function of synchronously processing multi-channel voltage signals;

the structural damage identification software integrates a damage identification algorithm for the prestressed concrete containment, and calculates and outputs damage types and damage specific positions by reading signals of the universal data acquisition equipment.

The invention also provides a prestressed concrete containment structure damage identification method, which comprises a prestressed concrete containment structure damage identification system;

the method comprises the steps that a plurality of sound pickup sensors are arranged on the surface of a prestressed concrete containment shell, the sound pickup sensors capture sound signals of specific frequency bands emitted when different materials of the prestressed concrete containment shell are damaged, the sound signals are collected to the universal data collection equipment, and the damage type and the specific damage position are calculated and output through the structural damage recognition software.

The method can accurately identify the structural damage type and the specific damage position of the prestressed containment vessel in real time, and provides basic data for the life evaluation work of the prestressed containment vessel.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments in order to make the above objects, features and advantages more apparent and understandable.

The implementation method comprises the following steps: a series of sound pickup sensors are arranged on the surface of the prestressed concrete containment shell, the sound pickup sensors are connected into a universal data acquisition device, the sound pickup sensors are used for capturing sound signals of specific frequency bands emitted when different materials (concrete, prestressed tendons and steel linings) of the prestressed concrete containment shell are damaged after a monitoring system is started, the captured sound signals are acquired to the universal data acquisition device, and finally, structural damage identification software displays damage types and damage specific positions.

The acoustic pickup sensor needs to have a wide frequency response range and high sensitivity, can directly output a voltage signal, and can be matched with general data acquisition equipment for use.

The general data acquisition equipment needs to have the function of synchronously processing multi-channel voltage signals.

The structural damage identification software integrates a damage identification algorithm for the prestressed containment vessel, and can directly output the damage type and the specific damage position.

After the prestressed concrete containment vessel is installed, the structural damage type and the specific damage position of the prestressed concrete containment vessel can be accurately identified in real time, and basic data are provided for life evaluation work of the prestressed containment vessel.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations. The foregoing examples or embodiments are merely illustrative of the present invention, which may be embodied in other specific forms or in other specific forms without departing from the spirit or essential characteristics thereof. The described embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention should be indicated by the appended claims, and any changes that are equivalent to the intent and scope of the claims should be construed to be included therein.