CN109813803B

CN109813803B - An Ultrasonic Detection Method Based on Polar Coordinate Method

Info

Publication number: CN109813803B
Application number: CN201910163655.3A
Authority: CN
Inventors: 贾碧原; 廖涛; 刘全; 李志明; 陈亮宏
Original assignee: Nanjing Institute of Technology
Current assignee: Nanjing Institute of Technology
Priority date: 2019-03-05
Filing date: 2019-03-05
Publication date: 2021-08-13
Anticipated expiration: 2039-03-05
Also published as: CN109813803A

Abstract

An ultrasonic detection method based on the polar coordinate method. A polar coordinate system is established on both sides of the building, and then the point to be detected (ρ1, θ1) and the corresponding point coordinates (ρ2, θ2) are determined respectively. The diameter and angle are the same to achieve point-to-point docking, which can realize the accurate docking of the ultrasonic detector probe, reduce the possible deviation in operation, reduce the error of the detection data and the impact on the evaluation of the building structure.

Description

Ultrasonic detection method based on polar coordinate method

Technical Field

The invention belongs to the field of building structure detection, and particularly relates to an ultrasonic detection method based on a polar coordinate method.

Background

The building structure detection is a detection work implemented for evaluating the engineering quality of a civil engineering structure or identifying the performance of an existing structure, and the ultrasonic method is one of several detection methods, and under the premise of not damaging the structure, the damage and the defect in the building structure are evaluated to determine whether the structure is safe and reliable. In the process of detecting the structure by using an ultrasonic method, the probe of the ultrasonic detector can not be accurately butted due to deviation possibly occurring at the detection position in operation, so that the error of detection data is caused, and the evaluation of the internal state of the building structure is easily influenced.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide an ultrasonic detection method based on a polar coordinate method, so that the position deviation possibly occurring in operation is effectively reduced, the accurate butt joint of probes of an ultrasonic detector is realized, and the precision of detecting structural damage by the ultrasonic method is improved.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: an ultrasonic detection method based on a polar coordinate method comprises the following steps:

s1: and applying the polar coordinate system to a required building structure, setting the two sides of the wall body as an A side and a B side, respectively taking the wall corner as a polar coordinate origin O, and taking the intersection line of the wall corner and the ground as an OX axis to establish the polar coordinate system.

S2: determining a position point to be detected on the side A of the wall body, pulling an ultrasonic detector probe to the position point to be detected, connecting one end of a lead with the ultrasonic detector probe, and arranging the other end of the lead on an original point O of a wall corner, reading out the length rho of the lead and an included angle theta of an OX axis which is the intersection line of the lead, the wall corner and the ground, wherein the length rho is the polar diameter in a polar coordinate, and determining the coordinates (rho 1, theta 1) of the position point to be detected in the established polar coordinate system.

S3: in a B-side polar coordinate system of the wall body, selecting the length rho of a lead of an ultrasonic detector in the B-side polar coordinate system relative to a probe of the ultrasonic detector according to the position point (rho 1, theta 1) to be detected in the step S2, wherein the lead is fixed at an origin O relative to one end of the probe of the ultrasonic detector, and then rho is a polar diameter in the polar coordinate system, and rotating the lead around the origin O to enable an included angle between the lead and a polar axis OX to be theta so as to obtain corresponding point coordinates (rho 2, theta 2).

S4: and carrying out accurate butt joint ultrasonic detection through ultrasonic detector probes positioned at symmetrical points on two sides of the wall body to obtain a detection result.

Preferably, the conducting wire is provided with scales.

Preferably, the polar coordinate system is axisymmetrically distributed on two sides of the wall.

Preferably, protractors are further arranged on two sides of the corner.

(III) advantageous effects

The ultrasonic detection method based on the polar coordinate method can realize accurate butt joint of the probe of the ultrasonic detector, reduce possible deviation in operation and reduce errors of detection data and influence on building structure evaluation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic representation of the use of the present invention;

FIG. 2 is an XY-plane wall in a three-dimensional perspective view;

FIG. 3 is a schematic cross-sectional view of a wall;

in the drawings, the components represented by the respective reference numerals are listed below:

1-ultrasonic detector probe, 2-wire.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: an ultrasonic detection method based on a polar coordinate method is characterized in that: the ultrasonic detection method based on the polar coordinate method comprises the following steps:

S2: determining a position point to be detected on the side A of the wall body, pulling the ultrasonic detector probe 1 to the position point to be detected, connecting one end of a lead 2 with the ultrasonic detector probe 1, and arranging the other end of the lead on the wall corner original point O, reading out the length rho of the lead 2 and the included angle theta of the lead 2, the wall corner and the ground, which is the OX axis, wherein the length rho is the polar diameter in the polar coordinate, and determining the coordinates (rho 1, theta 1) of the position point to be detected in the established polar coordinate system.

S3: in a B-side polar coordinate system of the wall, selecting a length ρ of a 2 ultrasonic detector wire in the B-side polar coordinate system relative to the ultrasonic detector probe 1 according to the to-be-detected position point (ρ 1, θ 1) in step S2, where ρ is a polar diameter in the polar coordinate system when one end of the wire 2 relative to the ultrasonic detector probe 1 is fixed to an origin O, and rotating the wire 2 around the origin O to make an included angle between the wire 2 and a polar axis OX be θ, so as to obtain a corresponding point coordinate (ρ 2, θ 2).

S4: and carrying out accurate butt joint ultrasonic detection through the ultrasonic detector probes 1 positioned at the symmetrical points on the two sides of the wall body to obtain a detection result.

In this embodiment, be equipped with the scale on the wire 2, be convenient for directly read the polar diameter, the polar coordinate system is axisymmetric distribution in wall body both sides, ensures that the ultrasonic detector probe butt joint of both sides is accurate, the corner both sides still are equipped with the protractor and are convenient for directly read out the contained angle between wire 2 and the polar axis.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An ultrasonic detection method based on a polar coordinate method is characterized in that: the ultrasonic detection method based on the polar coordinate method comprises the following steps: s1: applying a polar coordinate system to a required building structure, setting two sides of a wall body as an A side and a B side, respectively taking a wall corner as a polar coordinate origin O, and taking an intersection line of the wall corner and the ground as an OX axis, and establishing the polar coordinate system; s2: determining a position point to be detected on the side A of a wall body, pulling an ultrasonic detector probe (1) to the position point to be detected, connecting one end of a lead (2) with the ultrasonic detector probe (1), and arranging the other end of the lead on a wall corner original point O, reading out the length rho of the lead (2) and the included angle theta of an OX axis which is the intersection line of the lead (2) with a wall corner and the ground, wherein the length rho is the polar diameter in a polar coordinate, and determining the coordinates (rho 1, theta 1) of the position point to be detected in the established polar coordinate system; s3: in a B-side polar coordinate system of the wall body, selecting (2) the length of an ultrasonic detector wire relative to an ultrasonic detector probe (1) in the B-side polar coordinate system to be rho according to the position point to be detected (rho 1, theta 1) in the step S2, fixing one end of the wire (2) relative to the ultrasonic detector probe (1) at an origin O, wherein rho is the polar diameter in the polar coordinate system, and rotating the wire (2) around the origin O to enable the included angle between the wire (2) and the polar axis OX to be theta to obtain corresponding point coordinates (rho 2, theta 2); s4: carrying out accurate butt joint ultrasonic detection through ultrasonic detector probes (1) positioned at symmetrical points on two sides of a wall body to obtain a detection result; scales are arranged on the lead (2); the polar coordinate systems are distributed on two sides of the wall in an axisymmetric manner; and protractors are further arranged on two sides of the corner.