KR20140022636A - A indentor with a functional sensor, indentation tester and analysis system using the indentor - Google Patents

Abstract

The present invention relates to a functional indenter, an indentation test device using the same, an indentation test method, an analyzing system and method using the functional indenter. More specifically, the functional indenter for an indentation test comprises: an indenter pressed to a sample at a specific load while being in contact with the sample; and an ultrasonic sensor arranged in one side of the indenter, applying ultrasonic waves to the indenter, and receiving the ultrasonic waves reflected from the sample again. The functional indenter can make measurement data with high reliability because it can comprehensively obtain modification, defect, and breaking signals generated during the indentation, modification, and destruction in real time.

Description

A indentor with a functional sensor, indentation tester and analysis system using the indentor}

The present invention relates to functional indentation particles, an indentation test apparatus using a functional indentor, an indentation test method, and an analysis system and analysis method using a functional indentor. The present invention relates to an analytical apparatus using a functional indenter capable of providing a variety of information on infiltration deformation and damage of an indenter by providing a high frequency ultrasonic sensor on one end of a hard indenter used in an indentation testing apparatus.

The indentation hardness test is usually the most common technique to diagnose and inspect the initial and deteriorated properties of a material. It involves penetrating a rigid indenter into a measurement object to record mechanical deformation or fracture behavior. .

Unlike the method of measuring the indentation hardness by measuring the scale (size) of the deformation after the deformation is caused by applying a load to the surface of the object with the conventional dead weight, recently, the instrumentation indentation It has been developed as an instrumented indentation technique to evaluate indentation hardness, elastic modulus and plastic flow.

However, in the current development stage, the indenter's role is to transfer the external load to the object to be measured, and to remain in a part having a geometrical shape that penetrates the object surface unilaterally due to its higher hardness than the object to be measured.

Recently, it has been investigated to measure real-time fracture signal by attaching an acoustic emission sensor to a hard pressure particle, or to observe real-time contact deformation behavior of a target surface and an indenter by using a transparent indentor with light transmission Are being expanded.

Particularly, scratch test has been used to record the peeling or destruction events of hard films in real time by using indenters with acoustic emission sensors as commercial parts.

Therefore, there is a need for a test apparatus capable of verifying more information about infiltration deformation and damage by the pressure particle by analyzing the reflected ultrasonic signal reflected from the target test piece by applying ultrasonic signal instead of the acoustic emission sensor.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an ultrasonic sensor, It is possible to provide a test apparatus capable of producing highly reliable measurement data.

In addition, the indenter with a conventional acoustic emission sensor can analyze the sound waves emitted only when a local stress change or deformation occurs in the material, so that it is a passive and limited sensor structure, but an ultrasonic sensor is attached In the case of indenters, since the signal generated by driving the ultrasonic sensor is projected into the material and the reflected signal is analyzed, not only the local stress change and deformation but also internal defects can be detected, thereby providing a more active sensor structure .

In addition, it is possible to produce more reliable non-destructive data in an environment in which strong contact (adhesion) is induced to cause mechanical local deformation by applying an external load, and minimize human error signals such as sensor sticking caused by non-destructive testing To provide a test device that can be used.

In addition, by using functional indenters, it is possible to discover fusion technology and to expand the related industry by combining the mechanical property analysis method obtained by instrumentation indentation test method and the material evaluation method obtained by non-destructive test such as ultrasonic wave. .

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

A first object of the present invention is to provide a functional pressure particle for use in an indentation test, which comprises: pressure particles to be press-fitted in contact with a specimen at a specific load at an end thereof; And an ultrasonic sensor provided on one side of the indentor for applying ultrasonic waves to the indenter and receiving reflected ultrasonic waves reflected from the target specimen by the applied ultrasonic waves; As a functional pressure particle.

The lower end of the indentor is formed in a sharp shape such as a horn, the ultrasonic wave applied from the ultrasonic sensor is collected at the lower end of the indentor, and the reflected ultrasonic wave reflected from the object specimen is collected at the lower end of the indentor can do.

The ultrasonic sensor may include an ultrasonic wave applying unit for applying ultrasonic waves to the indenter and an ultrasonic wave receiving unit for receiving the reflected ultrasonic wave.

A second object of the present invention is to provide an indentation testing apparatus using a functional indentor, in which an end of the indentation is brought into contact with a target specimen under a specific load so as to press the indentation, and an ultrasonic wave is applied to the indentor, A functional pressure particle having an ultrasonic sensor for receiving a reflected ultrasonic signal reflected from a specimen; A pressure particle holder for fixing the functional indenter; A driving unit for driving the droplet holder unit; And a support base on which the target test piece is installed.

And a force measuring unit for measuring in real time the indentation load applied to the target test piece by press-fitting the functional indenter.

And a driving control unit for controlling the driving unit based on the data measured by the force measuring unit.

The ultrasonic sensor includes an ultrasonic wave applying unit for applying ultrasonic waves to the indenter and an ultrasonic wave receiving unit for receiving reflected ultrasonic waves. The indenter has a lower end formed in a sharp shape like a horn. The ultrasonic wave signal applied by the ultrasonic wave applying unit is press- And the reflected ultrasonic signal reflected from the target specimen is collected at the lower end of the indenter.

An ultrasonic generator for generating ultrasonic waves and scanning the ultrasonic waves with the ultrasonic waves; And an ultrasonic controller for adjusting the energy and frequency of the ultrasonic waves generated in the ultrasonic wave generator.

A third object of the present invention is to provide an indentation test method using a functional indentor, in which an object test piece is fixed to a support, and a pressure particle which is brought into contact with a target specimen at a specific load at an end thereof is provided on one side of the indentor, Providing a function indentor having an ultrasonic sensor for receiving a reflected ultrasonic signal reflected from an object specimen and applying ultrasonic waves to the object specimen; The driving unit moves the pressure particle holder unit so that the lower end of the indentor is press-fitted into the target test piece; A step of applying an ultrasonic signal to the indentator in the ultrasonic sensor and reflecting the applied ultrasonic signal to the object specimen; And receiving the reflected ultrasound signal at the ultrasonic sensor. The method of the present invention can be achieved by a method of indentation testing using a functional indenter.

The driving control unit controls the driving unit based on the data measured by the force measuring unit for measuring the pressing load applied to the target test piece in real time by press-fitting the functional indenter, thereby changing the indentation load applied to the target test piece .

The method may further include scanning the ultrasonic wave generated by the ultrasonic wave generator with the ultrasonic wave sensor and adjusting the energy and frequency of the ultrasonic wave generated by the ultrasonic wave generator in the ultrasonic wave controller.

A fourth object of the present invention is to provide an ultrasonic diagnostic apparatus and an ultrasonic diagnostic apparatus, which are provided on one side of an indentor to which a tip is brought into contact with a target specimen under a specific load and a pressure ultrasonic wave is applied to the indentor, A functional pressure particle having an ultrasonic sensor; A pressure particle holder for fixing the functional indenter; A driving unit for driving the droplet holder unit; A support on which the target specimen is installed; A force measuring unit for measuring in real time an indentation load applied to a target test piece by infiltration of a functional indenter; And analyzing means for analyzing the non-destructive data of the target test specimen based on the reflected ultrasound signal received by the ultrasonic sensor and the data measured by the force measuring unit.

The non-destructive data may be at least one of penetration displacement, material accumulation data, defect signal, destruction signal, and stress change data.

And a driving control unit for controlling the driving unit based on the data measured by the force measuring unit.

The target test piece may be a material exposed to an erosive gas or a deteriorated environment.

A fifth object of the present invention is to provide a method of testing a test piece by fixing an object specimen to a support, placing the pressure particle on the one end of the indentor by pressurizing the end portion of the specimen by a specific load and applying the ultrasonic wave to the specimen, Providing a functional indentor having an ultrasonic sensor for receiving a reflected ultrasonic signal in a pressure particle holder; The driving unit moves the pressure particle holder unit so that the lower end of the indentor is press-fitted into the target test piece; A step of applying an ultrasonic signal to the indentator in the ultrasonic sensor and reflecting the applied ultrasonic signal to the object specimen; Receiving a reflected ultrasound signal at an ultrasonic sensor; And obtaining the non-destructive data for the object test specimen based on the reflected ultrasonic signal received by the analyzing means from the ultrasonic sensor.

The driving control unit controls the driving unit based on the data measured by the force measuring unit for real time measurement of the indentation load applied to the target test piece by infiltration of the functional indenter, thereby changing the indentation load applied to the target test piece And the analyzing means analyzes the data measured by the force measuring unit and the reflected ultrasonic signal to obtain the non-destructive data of the target specimen.

According to the embodiment of the present invention, since the ultrasonic sensor is directly connected to the indentor, it is possible to comprehensively compile indentation deformation, real-time deformation, defects and destruction signals appearing during destruction, so that it is possible to produce highly reliable measurement data .

In addition, the indenter with a conventional acoustic emission sensor can analyze the sound waves emitted only when a local stress change or deformation occurs in the material, so that it is a passive and limited sensor structure, but an ultrasonic sensor is attached In the case of the indenter, the signal generated by driving the ultrasonic sensor is projected into the material, and the reflected signal is analyzed. Therefore, it is possible to detect not only a local stress change and deformation but also an internal defect to provide a more active sensor structure There is an advantage.

In addition, it is possible to produce more reliable non-destructive data in an environment in which strong contact (adhesion) is induced to cause mechanical local deformation by applying an external load, and minimize human error signals such as non-destructive sensor adhesion .

In addition, by using functional indenters, it is possible to discover the fusion measurement technique and to expand the related industry by combining the dynamics analysis method obtained by instrumentation indentation test method and the damage diagnosis method obtained from non-destructive measurement such as ultrasonic wave have.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be appreciated by those skilled in the art that various other modifications and variations can be made without departing from the spirit and scope of the invention, All fall within the scope of the appended claims.

1 is a front view of an indentation testing apparatus using a functional indentor according to an embodiment of the present invention;
2 is a partial cross-sectional view of an indentation testing apparatus using a functional indentor according to an embodiment of the present invention
3 is a block diagram illustrating the flow of ultrasonic signals in an analysis system using a functional indenter according to an embodiment of the present invention.
4 is a block diagram illustrating a signal flow of an analysis system using a functional indenter according to an embodiment of the present invention.
FIG. 5 is a flowchart illustrating an analysis method using a functional indenter according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings. Throughout the specification, when a part is connected to another part, it includes not only a case where it is directly connected but also a case where the other part is indirectly connected with another part in between. In addition, the inclusion of an element does not exclude other elements, but may include other elements, unless specifically stated otherwise.

Hereinafter, the configuration and function of the functional pressure particle and the indentation testing apparatus using the functional indenter according to an embodiment of the present invention will be described. 1 is a front view of an indentation testing apparatus using a functional indentor according to an embodiment of the present invention. 2 is a partial sectional view of an indentation testing apparatus using a functional indentor according to an embodiment of the present invention.

2, the functional indenter according to an embodiment of the present invention is provided with an ultrasonic sensor 20 on one side of an upper portion of a normal hard pressure particle 10 to form a semi-permanent, rigid and precise pressure particle 10 ) Of the test piece (1) according to the penetration of the test piece (1).

As shown in FIGS. 1 and 2, the lower end of the piezoelectric particle 10 is formed as an acoustic horn. Therefore, as described later, as described later, the ultrasonic energy generated in the ultrasonic sensor 20 can be efficiently transferred to the target test piece 1 by concentrating on the end portion, and conversely, The reflected ultrasonic wave signal can be similarly focused efficiently, so that it is possible to obtain a very excellent ultrasonic signal reception characteristic.

As shown in FIG. 2, the ultrasonic sensor 20 provided at one side of the pressure particle 10 applies ultrasonic waves to the pressure particle 10, and the ultrasonic wave is reflected by the target test piece 1 Ultrasound signals are received. The ultrasonic sensor 20 includes an ultrasonic wave applying unit 21 for applying an ultrasonic signal to the abrasive particles 10 and an ultrasonic wave receiving unit 22 for receiving reflected ultrasonic waves reflected from the object test piece 1. [ .

In addition, an indentation testing apparatus using a functional indentor according to an embodiment of the present invention includes an ultrasonic wave generator 91 for generating ultrasonic waves and scanning ultrasonic waves with the ultrasonic wave applying unit 21, and an ultrasonic wave generator 91 for measuring the energy and frequency of the ultrasonic waves generated from the ultrasonic waves. And an ultrasonic wave controller 90 for adjusting the ultrasonic wave.

The indentation testing apparatus using the functional indentor according to the embodiment of the present invention is provided with a support base 2 for supporting the target test piece 1, a pressure grapholder holder for fixing the functional indentor 30, and a driving unit 50 for driving the droplet holder 30.

3 is a block diagram illustrating the flow of ultrasound signals in an analysis system using a functional indenter according to an embodiment of the present invention. 3, the ultrasonic wave controller 90 controls the ultrasonic wave generator 91 to generate ultrasonic waves having the predetermined energy and frequency in the ultrasonic wave generator 91. [ The generated ultrasonic waves are applied to the ultrasonic wave applying unit 21 of the ultrasonic sensor 20 and the ultrasonic waves applied to the ultrasonic wave applying unit 21 are scanned by the intensive particle 10.

The ultrasonic waves injected into the pressure particle 10 are projected and reflected by the pressure particle 10 onto the target test piece 1 infiltrated by a specific indentation load. The reflected ultrasonic wave signal is received again by the ultrasonic wave receiving unit 22 of the ultrasonic sensor 20 and the received ultrasonic wave signal is analyzed by the analyzing means 80 to acquire the non-destructive data of the object test piece 1 .

4 is a block diagram illustrating a signal flow of an analysis system using a functional indenter according to an embodiment of the present invention. First, an indentation testing apparatus and analysis system using a functional compactor according to an embodiment of the present invention includes a force measuring unit 60 for measuring in real time an indentation load applied to a target test piece 1 by penetration of a functional indenter .

The drive control unit 70 determines whether to change the indentation load applied to the target test piece 1 based on the indentation load data measured by the force measurement unit 60 and, when it is desired to change the indentation load, The driving unit 50 is controlled.

The analyzing means 80 analyzes the indentation load data currently applied to the object test piece 1 and the reflected ultrasonic signal received by the ultrasonic wave receiver 22 of the ultrasonic sensor 20 to obtain nondestructive data for the object test piece 1 .

Such non-destructive data corresponds to at least one of data on penetration displacement, material pile-up phenomenon data, defect signal, destruction signal, and stress change data.

That is, the functional indentor provided with the ultrasonic sensor 20 can measure penetration displacement of the pressure particle 10 in real time by analyzing the reflected ultrasonic signal and thickness information of the object test piece 1, and further measurement of the transverse wave information Through the analysis, it becomes possible to quantitatively analyze the accumulation phenomenon of material derived from the difficulty of measurement in the instrumental indentation test method.

In addition, it is possible to obtain immediate response characteristics to the occurrence of additional defects during penetration deformation, as well as to grasp the expansion behavior of plastic deformation field in real time. Especially, it is possible to diagnose non-destructive damage of materials exposed to corrosive gas or deteriorated environment such as hydrogen It is possible to remove the signal noise coming from the contact by bringing the functional indentor into close contact with the surface of the test piece 1 at a constant indentation load (constant contact pressure).

Hereinafter, the above-described indentation testing apparatus using the functional indentor, and the analysis method of the object test piece (1) using the analysis system will be described. FIG. 5 is a flowchart illustrating an analysis method using a functional indenter according to an embodiment of the present invention.

First, the object test piece 1 is fixed to the support base 2 and the pressure particle 10 which is press-fitted into the pressure particle holder 30 by contact with the object to be tested 1 under a specific load, There is provided a functional indenter having an ultrasonic sensor 20 provided on one side thereof for applying ultrasonic waves to the abrasive particles 10 and receiving reflected ultrasonic signals reflected from the target test piece 1 by the applied ultrasonic waves (S1) .

Then, the drive unit 50 moves the droplet holder unit 30 to press the lower end of the pressure particle 10 into the target test piece 1 (S2). Next, an ultrasonic signal is applied to the abrasive grains 10 from the ultrasonic sensor 20 (S3), and the applied ultrasonic signal is transmitted and reflected to the target test piece 1 (S4).

Then, the reflected ultrasound signal is received by the ultrasonic sensor 20 (S5). Next, the analyzing means 80 receives the reflected ultrasonic signal from the ultrasonic sensor 20, Non-destructive data is obtained (S6)

In this process, the driving control unit 70 controls the driving unit 50 based on the data measured by the force measuring unit 60 for real-time measurement of the indentation load applied to the target test piece 1 by press-fitting the functional indenter So that the indentation load applied to the target test piece 1 can be changed. In addition, the analyzing means 80 analyzes the data measured by the force measuring unit 60 and the reflected ultrasonic signal to obtain nondestructive data for the object specimen 1. The step of scanning the ultrasonic waves generated by the ultrasonic wave generator 91 with the ultrasonic sensor 20 and the step of adjusting the ultrasonic waves generated by the ultrasonic wave generator 91 in the ultrasonic wave controller 90 .

1: Target specimen
2: Support
10:
20: Ultrasonic sensor
21: ultrasonic wave applying unit
22: Ultrasonic receiver
30: pressure particle holder portion
50:
60: force measuring unit
70:
80: Analysis means
90: Ultrasonic wave controller
91: Ultrasonic wave generator

Claims (16)

In the functional indenter configured for the indentation test,
An indenter in which the tip is pressed into contact with the target specimen under a specific load; And
An ultrasonic sensor provided on one side of the indenter to apply ultrasonic waves to the indenter, and receive reflected ultrasonic waves in which the applied ultrasonic waves are reflected on the target test piece; Functional indenter comprising a.
The method of claim 1,
The indenter is formed in a sharp shape such that the lower end is a horn,
The ultrasonic wave applied from the ultrasonic sensor is collected at the lower end of the indenter, and the reflected ultrasonic wave reflected from the target test piece is collected at the lower end of the indenter.
The method of claim 1,
The ultrasonic sensor includes an ultrasonic applying unit for applying the ultrasonic wave to the indenter and an ultrasonic receiving unit for receiving the reflected ultrasonic wave.
In the indentation test apparatus using the functional indenter,
As the end continuously increases the load on the target specimen and continuously decreases the load after the maximum load, it continuously penetrates the surface of the specimen, and after the maximum penetration depth, on one side of the indenter where desorption occurs in the specimen with elastic relaxation. A functional indenter having an ultrasonic sensor configured to apply an ultrasonic wave to the indenter and receive the reflected ultrasonic signal reflected by the applied ultrasonic wave to the target test piece;
A pressure particle holder for fixing the functional indenter;
A driving unit for driving the droplet holder unit; And
Indentation test apparatus using a functional indenter, characterized in that it comprises a support on which the target specimen is installed.
5. The method of claim 4,
Indentation test apparatus using a functional indenter further comprises a force measuring unit for measuring in real time the indentation load applied to the target test piece by the indentation of the functional indenter.
6. The method of claim 5,
Indentation test apparatus using a functional indenter, characterized in that further comprising a drive control unit for controlling the drive based on the data measured by the force measuring unit.
5. The method of claim 4,
The ultrasonic sensor includes an ultrasonic wave applying unit for applying the ultrasonic wave to the indenter and an ultrasonic receiver for receiving the reflected ultrasonic wave,
The indenter has a lower end formed in a sharp shape such as a horn, and the ultrasonic signal applied from the ultrasonic application unit is collected at the lower end of the indenter, and the reflected ultrasonic signal reflected from the target test piece is directed to the lower end of the indenter. Indentation test apparatus using the functional indenter, characterized in that the aggregate.
8. The method of claim 7,
An ultrasonic generator for generating ultrasonic waves and scanning the ultrasonic waves with the ultrasonic applying unit; And
Indentation test apparatus using a functional indenter, characterized in that further comprising an ultrasonic control unit for adjusting the energy and frequency of the ultrasonic wave generated by the ultrasonic generator.
In the indentation test method using the functional indenter,
The target specimen is fixed to a support, and the tip is provided on one side of the indenter and the indenter in contact with the indentation with a specific load, and ultrasonic waves are applied to the indenter, and the applied ultrasonic waves are reflected on the target specimen. Installing a functional indenter having an ultrasonic sensor for receiving an ultrasonic signal on the indenter holder;
The driving unit moves the pressure particle holder unit and presses the lower end of the indentor into the object test piece;
Applying an ultrasonic signal to the indentor in the ultrasonic sensor and reflecting the applied ultrasonic signal on the object specimen; And
Receiving the reflected reflected ultrasonic signal from the ultrasonic sensor; Indentation test method using a functional indenter comprising a.
The method of claim 9,
Injecting the ultrasonic wave generated by the ultrasonic generator into the ultrasonic sensor and adjusting the energy and frequency of the ultrasonic wave generated by the ultrasonic generator in the ultrasonic control unit. .
An ultrasonic sensor that is provided at one end of the indenter and the indenter in contact with the indented end by contacting the target specimen with a specific load, and applies ultrasonic waves to the indenter, and receives the reflected ultrasonic signal in which the applied ultrasonic waves are reflected on the target specimen Functional indenter provided;
A pressure particle holder for fixing the functional indenter;
A driving unit for driving the droplet holder unit;
A support table on which the target test piece is installed;
A force measuring unit for measuring in real time an indentation load applied to the target test piece by infiltration of the functional indenter; And
And analysis means for analyzing the non-destructive data of the target test piece based on the reflected ultrasonic signal received from the ultrasonic sensor and the data measured by the force measuring unit.
12. The method of claim 11,
Wherein the non-destructive data is at least one of penetration displacement, material accumulation data, defect signal, breakdown signal, and stress change data.
12. The method of claim 11,
And a driving control unit for controlling the driving unit based on the data measured by the force measuring unit.
12. The method of claim 11,
Wherein the object test piece is a material exposed to an erosive gas or a deteriorated environment.
The target specimen is fixed to a support, and the tip is provided on one side of the indenter and the indenter in contact with the indentation with a specific load, and ultrasonic waves are applied to the indenter, and the applied ultrasonic waves are reflected on the target specimen. Installing a functional indenter having an ultrasonic sensor for receiving an ultrasonic signal on the indenter holder;
The driving unit moves the pressure particle holder unit and presses the lower end of the indentor into the object test piece;
Applying an ultrasonic signal to the indentor in the ultrasonic sensor and reflecting the applied ultrasonic signal on the object specimen;
Receiving reflected ultrasound signals at the ultrasonic sensor; And
And analyzing means for obtaining nondestructive data for the target test piece based on the reflected ultrasonic signal received by the ultrasonic sensor.
16. The method of claim 15,
The driving control unit controls the driving unit to change the indentation load applied to the target test piece based on the data measured by the force measuring unit for measuring the indentation load applied to the test piece in real time due to penetration of the functional indenter. More steps,
And the analyzing means analyzes the data measured by the force measuring unit and the reflected ultrasonic signal to obtain non-destructive data for the target test piece.

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