CZ304637B6 - System of instrumented measurement of indenter indentation parameters - Google Patents

Abstract

In the present invention, there is disclosed a measuring system for non-destructive testing based on indentation of an indenter and continuous measurement of electrical signals (mV), which correspond to the change in the measured parameters of indentation depth (h) and applied load (P) during indentation. Dependences load-depth and voltage-deformation, based on recorded signals, it is possible to determine the number of hardness and other mechanical properties such as Young’s modulus of elasticity, yield strength, ultimate strength, and also energy of elastic deformation, energy of permanent deformation, strain-hardening exponent and grain size. The system consists of the following parts: a computer (1), an analog signal amplifier (2), a test specimen (3) holder, a measuring apparatus (4) comprising an adapter (5), a load sensor (13) and a displacement transducer (9) with strain gauges (10), a casing (19) cover with acoustic emission (20) sensor (20) and a load feel system (5). The load sensor is an exchangeable dynamometer (13) with deformation strips (14) that measure under low load values. High load values are measured by a tougher portion of the dynamometer, i.e. the roller (15). The displacement transducer is an exchangeable capsule (9), comprising a lever multiplier (12) of the indenter (18) linear displacement during its indentation into the surface of the test specimen (3).

Description

Technical field

The invention relates to a system of instrumented measurement of indentor indentation parameters comprising a test mechanism loading mechanism and a measuring device provided with a displacement sensor and a load sensor.

BACKGROUND OF THE INVENTION

Conventional methods of measuring the mechanical properties of materials are time-consuming and expensive, requiring the production of special test specimens. The most common mechanical tests are the tensile test, the bend impact test and the hardness test. The usual output of these tests are graphical dependencies between stress and strain of the tested material. There are non-destructive methods and devices for performing rapid evaluation of material properties with sufficient accuracy, including methods of automated indentor indentation. These methods are used to develop new materials and equipment, to evaluate and timely estimate possible variations in their performance during operation. The basic properties to be measured are hardness, modulus of elasticity, yield strength, yield strength, as well as elastic and plastic deformation energy, hardening exponent and grain size.

The hardness measurement is based on the indentation process, where the indentor enters the surface of the test sample and the hardness number is then determined by the geometric indentation parameters, depending on the applied load. The basic geometrical parameters are the indentation diameter - according to Brinell, the diagonal - according to Vickers, or the depth of indentation - according to Rockwell. Techniques that determine the correlation between hardness number and basic mechanical properties are well known in engineering practice and have been standardized, eg, GOST 18835-73, GOST 22762-77. Theoretical and experimental studies show that the indentation test provides the most objective results of the determined mechanical properties of materials and coatings, using not only one hardness value at a given load, but continuous recording of load and unloading process parameters, the load-depth curve [Anisimov Evgeniy, Puchnin Maxim : Reduction of Elastic Module of Titanium Alloy Ti-6AI-4V by Quenching, in Book of Abstracts, Local Mechanical Properties, 2012, Slovak Republic, ISBN 978-80-553-1163-0, Puchnin Maxim, Anisimov Evgeniy: The Method of Accounting of Elastic Deformation Occur During Automated Packages of the Indentation Test, in Conferrence Proceedings, COMAT, 2012, Czech Republic, ISBN 978-80-87294-34-5]. This method is called instrumented material indentation testing. The load-depth curve then describes the characteristic behavior of the material under the influence of elastic, elastic-plastic and plastic deformation [ASTM WK381, US 6,718,820 (Kwon) 13.04.2004],

The measuring device used for indentor indentation testing comprises a load cell, a displacement sensor [PCT / KR02 / 01351 (Lee) 18.07.2002, PCT / IB2005 / 002275 (Beghini) 01.08.2005, US 2009/0107221 Al (Emts) 30.04. 2009], There are various methods of loading indentor, such as hydraulic [US 4 059 990 (Glover) 29.11.1977], pneumatic [US 4 182 164 (Fohey) 08.01.1980, US 2 839 917 (Webster) 24.06.1958, US 4 534 212 (Targosz) 13.08.1985], electromechanical [US 4 611 487 (Krenn) 16.09.1986, US 6 718 820 (Kwon) 04/13/2004, PCT / IB2005 / 002275 (Beghini) 01.08.2005, US 7 066 013 B2 (Wu) 27.06.2006, US 2011/0132078 Al (Wu) 09.06.2011] using geared electric motors [US 4 635 471 (Rogers) 13.01.1987] or belt drive [US 5 616 857 (Merck 01.04.1997], electromagnetically or piezoelectric elements [US 4 304 123 (Ashinger) 08.12.1981, US 6 026 677 (Bonin) 22.02.2000], mechanical using weights [US 3 367 174 (Afin) 06.02.1968, US 4,103,538 (Stóferle) August 1, 1978], crank and lever mechanisms [US 4,435,976 (Edward) March 13, 1984, US 4,535,623 (Gilberto) August 20, 1985, US 4,182,164 (Fohey) January 8, 1980, US 2009/0107221 A1 (Ernst) 30.04.2009, EP 2 345 884 A2 (SAW) 06.01.2011].

-1 CZ 304637 B6

Hydraulic [HS 4 059 990 (Glover) 29.11.1977] and spring [US 4 312 220 (Borgersen) 26.01.1982] load meters, piezoelectric elements [US 6 026 677 (Bonin) 22.02.2000], capacitive [US 7 066 013 B2 (Wu) 27.06.2006, US 2011/0132078 Al (Wu) 09.06.2011] and strain gauges [US 3 934 463 (Vanderjagt) 27.01.1976, US 4 304 123 (Ashinger) 08.12.1981, US4611 487 ( Krenn) 16.09.1986, US 6 718 820 (Kwon) 13.04.2004, US 2011/0132078 Al (Wu) 09.06.2011] are used to measure the load value. Laser Optical Methods [US 5 616 857 (Merck) 01.04.1997, US 6 026 677 (Bonin) 22.02.2000, PCT / KR02 / 01351 (Lee) 18/07/2002, PCT / IB2005 / 002275 (Beghini) 01.08. 2005, US 6,755,075 B2 (Nagashima) 29.01.2004] and electro-optical drives [US 4 312 220 (Borgersen) 26.01.1982], Capacitive [US 7 066 013 B2 (Wu) 27.06.2006, US 2011/0132078 Al (Wu) 09.06.2011], Potentiometric [EP 2 390 649 Al (Sakuma) 18.01.2010] Electromagnetic [US 4,159,640 (Lévéque) July 3, 1979, US 4,182,164 (Fohey) January 8, 1980, US 4,435 976 (Edward) March 13, 1984, US 4,534,212 (Targosz) August 13, 1985, US 6,718,820 (Kwon) April 13, 2004, US 4,034,603 (Leeb) July 12, 1977], piezoelectric [US 6,026,677 (Bonin) 22.02 .2000] and strain gauges [Degtyarev VI, Lagveshkin V.Ya. Perenosnaya tenzometricheskaya golovka dlya opredeleniya mehanicheskih svoystv metallov vdavlivaniem, Izmeritelnaya tehnika, 1982, nomer 5, USSR, ISSN 0368-1025] are often used to record the depth of penetration, or the actual linear displacement of the indentor during the indentation test, or the actual linearententor .

The measurement accuracy of the total linear displacement of the indentor depends on the sensitivity of the indentation depth sensor, which has its resolution and allows the recording of a definite number of values at a given displacement. Problems of recording accuracy of small indentor shifts are usually solved by laser optics or electromagnetic systems. The accuracy of the measurement depends not only on the confidentiality of the recorded value, but also on the distance between the sensor and the indentor. A larger number of elements between the sensor and the indentor increases the measurement error, since the measurement itself is then influenced by the stress-strain states of these elements depending on the load conditions, number of cycles and atmospheric parameters, especially pressure and temperature. The displacement transducer is often part of the load mechanism and thus complicates the process of correctly interpreting the results during indentation [US 2,839,917 (Webster) June 24, 1958, US 4,159,640 (Lévéque) July 3, 1979, US 4,435,876 (Edward) March 13, 1984 US 3 367 174 (Affri) February 6, 1968, US 4 245 496 (Napetschnig) January 20, 1981, US 4 312 220 (Borgersen) January 26, 1982, US 4,534,212 (Targosz) August 13, 1985, US 6,755,075 B2 (Nagashima) 29.01.2004, US 7 066 013 B2 (Wu) 27.06.2006], Existing devices that implement an instrumented indentation method with high accuracy and repeatability of the measurement process have larger dimensions [US 5 616 857 (Merck) 01.04.1997 , US 2011/0132078 Al (Wu) 09.06.2011], are often limited by the range of load used [US 4,159,640 (Lévéque) July 3, 1979, US 4,304,123 (Ashinger) December 8, 1981, US 4,611,487 (Krenn) 16.09.1986, US 6,026,677 (Bonin) 22/02/2000, PCT / KR02 / 01351 (Lee) 18/07/2002, US 6,718,820 (Kwon) 13/04/2004, US 2009/0107221 Al (Emts) 30.04. 20 May 09] or the size of the indentor [US 4,534,212 (Targosz) 13.08.1985, US 4,535,623 (Gilberto) August 20, 1985, PCT / KR02 / 01351 (Lee) 18.07.2002, US 6,755,075 B2 (Nagashima) 29.01. 2004], measures the total linear displacement of the indentor. There are also known difficulties in identifying failure initiation parameters based on depth and stress-strain dependence when measuring coating properties [PCT / US00 / 09940 (White) April 13, 1999, NH Faisal, JA Steel The Use of Acoustic Emission to Characterize Fracture Behavior During Vickers Indentation of HVOF Thermally Sprayed WC Coatings, Journal of Thermal Spray Technology, Vol. 18 (4), pp. 525-535, (2009), Markus G. R. Sause, Daniel Schultheip. Acoustic emission investigation of coating fracture and delamination in hybrid carbon fiber reinforced plastic structures, Journal of Acoustic Emission, 26, ρ. 1 to 13, (2008)], which are solved by means of acoustic emission sensors [US 4,856,326 (Tsukomoto) 15.08.1989].

Ashinger [US 4 304 123 (Ashinger) 08.12.1981] describes the possibility of using strain gauge sensors, which are connected to a flexible arm, to register low values of indentor loads and displacements. Measurement of higher indentation parameter values is described by [Degtyarev V.I., Lagveshkin V.Ya. Perenosnaya tenzometricheskaya golovka dlya opredeleniya mehanicheskih svoystv metallov vdavlivaniem, Izmeritelnaya tehnika, 1982, nomer 5, USSR, ISSN 0368-1025]. Napetschnig [US 4 245496 (Napetschnig) 20.01.1981] proposes the vertical location of a flexible arm. In the Fohey apparatus [US 4 182 164 (Fohey) 08.01.1980] a short displacement measuring circuit is realized, where only the indentor and indentor holder are loaded, which is the lowest number of elements found between the sensor and the indentor, which deforms. Borgersen [US 4 312 220 (Borgersen) January 26, 1982] implements a lever mechanism to subtract the load parameter.

SUMMARY OF THE INVENTION

The above drawbacks are largely overcome by an instrumented indentor indentation measurement system comprising a test pattern loading mechanism and a measuring device provided with a displacement sensor and a load sensor according to the present invention. In essence, the measuring device comprises a housing in which a spring adapter and displacement sensor are provided, provided with a strain gauge sensor and a deformation tape, and a load sensor provided with deformation tapes, a cylinder and a rod extending from the indentor disposed in the holder to the displacement sensor.

The loading mechanism may be a Brinell, Vickers, Rockwell hardness tester, a universal tear-off machine, a lever mechanism with its own load source or a piezoelectric element.

The displacement transducer may consist of a replaceable capsule comprising a linear displacement multiplier of the indentor with a spherical bowl for supporting the rod, and strain gauges for generating signal (mV) depending on their elastic deformation, their registration in an analog signal amplifier, and saving to computer. Optionally, the displacement transducer may be a replaceable capsule that includes a deformation bridge with a spherical cup to accommodate the rod and a strain gauge transducer. Further, the displacement transducer may be a replaceable capsule comprising an arm-shaped deformation strip provided with a spherical cup for supporting the bar and a strain gauge transducer.

The load cell is preferably a replaceable dynamometer having strain gauges with strain gauge sensors for measuring low load values and a motion cylinder with strain gauge sensors, the strain gauge sensors being coupled to an analog signal amplifier and a computer.

Preferably, the measurement system is provided with a housing cover and an acoustic emission sensor for measuring an acoustic signal that is registered by an analog signal amplifier and stored in a computer.

The measuring system is based on an indentor indentor automatically loaded under load, which has a reliable, easy to manufacture and operable adapter to measure the main indentation parameters such as load (P) and depth (h). The measuring device, due to its design, does not load the displacement transducer, intended to record the indentation depth (h) when indenting the indentor, and allows the indentation parameter (mV) to be recorded with greater accuracy compared to devices having a longer measuring circuit. The measuring device is compact and can be used in conjunction with various measuring systems, such as a shredder and hardness tester, expanding their capabilities and optimizing the identification process. The determination of mechanical properties is performed on the basis of the indentation parameters. Various indentors are available, such as Brinell, Vickers, Knoop, Berkovich, Rockwell. The graphical load dependence depth shows the deformation behavior of the material during the load cycle.

The load cell is a replaceable dynamometer that contains deformation tapes for measuring small load values, larger load values are measured by a stiffer dynamometer element, a cylinder. By increasing the total measured strain range of the load cell by means of straps, the strain level of the strain gauge sensors increases, and thus the accuracy of low load values detection, which allows to increase the registered signal (mV) recording frequency with the same sensitivity of the strain gauge sensors. To optimize the process of measuring load values during indentation, load types of several types have been developed.

-3 CZ 304637 B6

The displacement transducer is a replaceable capsule that includes a lever multiplier of the linear displacement of the indentor as it is pushed into the surface of the specimen that increases the deflection level of the deformation tape. By increasing the deformation level of the strain gauges that are connected to the strain tape, the registered signal (mV) recording frequency is increased and the accuracy of small displacement detection is increased at the same sensitivity of the strain gauges. Several types of displacement sensors have been developed to optimize the process of measuring displacement values during indentation.

The measuring system allows continuous measurement of electrical signals (mV), which corresponds to changes in the measured indentation depth (h) and applied load (P) parameters during indentation where, depending on load-depth and stress-strain dependencies, properties such as modulus of elasticity, yield strength, yield strength , as well as the energy of elastic and plastic deformation, exponent firming, grain size.

Clarification of the figures in the drawings

The invention will be described in more detail with reference to the accompanying drawings. In FIG. 1 is an elevational view of an exemplary instrumented measuring system. In FIG. 2 shows an exemplary measuring device. In FIG. 3 (a) is a basket type dynamometer. In FIG. 3 (b) is a cylindrical type dynamometer. In FIG. 4 (a) is a displacement measuring capsule comprising a lever type deformation tape. In FIG. 4 (b) is a displacement measuring capsule that includes a bridge-type deformation tape. In FIG. 4 (c) is a displacement measuring capsule that includes a shoulder-type deformation tape. Giant. Fig. 5 illustrates the location of the acoustic emission sensor in the housing lid; 6 (a) illustrates a variant of the load of the measuring device by means of a hardness tester. Giant. 6 (b) illustrates a variant of the load of the measuring device by means of a shredder. Giant. 6 (c) illustrates a variant of the load of the measuring device by means of a piezoelectric element. Giant. 6 (d) illustrates a variant of the load of the measuring device by means of a load mechanism with a lever transmission. Giant. 7 illustrates a typical load-depth indentation curve comprising load (N) and depth (mm) values.

DETAILED DESCRIPTION OF THE INVENTION

The objects and advantages of the present invention are described in detail in the following and accompanied by a pictorial documentation.

The instrumented measuring system comprises a computer 1, an analog signal amplifier 2, a test specimen holder 3, a measuring device 4 and a load mechanism 5. The measuring device comprises a housing 6, an adapter 7, a spring 8, a capsule 9, strain gauges 40, a strain tape 11, a lever 12, dynamometer 13, deformation strip 14, cylinder 5, rod 16. indentor holder 17, indentor 18, housing cover 19, acoustic emission sensor 20, test piece 3.

In FIG. 3 (a) is a basket type load cell dynamometer 13 for measuring the applied load, which includes deformation strips 14, a cylinder 15, and strain gauges 40. In FIG. 3 (b) is a cylindrical load cell dynamometer 13 for measuring the applied load which includes strain gauges 40.

In Fig. 4 (a) there is a displacement measuring capsule 9 comprising a lever type deformation strip 11, a lever multiplier 12, a spherical cup 22, strain gauges 10 and an acoustic emission sensor 20. In Fig. 4 (b) there is a displacement measuring capsule 9 comprising a bridge-type deformation strip 11, a spherical cup 22, strain-gauge sensors 10 and an acoustic emission sensor 20. In FIG. 4 (c) is a displacement measuring capsule 9 comprising an arm-type deformation strip 11, a spherical cup 22, strain gauges 40 and an acoustic emission sensor 20. The acoustic emission sensor 20 may be in the housing lid 49.

-4GB 304637 B6

In FIG. 6 shows various load variations of the measuring device 4 by means of a hardness tester 26, a tearing machine 27, a piezoelectric element 28 and a load mechanism 30 with lever transmission 29.

In FIG. 7 shows a typical load-depth indentation curve comprising load (N) and depth (mm) values.

As shown in FIG. 1, the measuring system is intended to carry out the indentation test and comprises a specimen holder 3, tested by a measuring device 4, which generates signals during the indentation process under load generated by the load mechanism 5, registered amplifiers, 2 analog signal and stored in a computer i.

As illustrated in FIG. 2, when the load is applied to the adapter 7 by the loading mechanism 5, the adapter 7 begins to move in the housing 6 of the measuring device 4. The housing 6 is pressed against the test specimen 3 by the spring 19 cover. it pushes the indentor 18 into the surface of the test specimen 3 through the indentor holder 17. The rod 16 moves along with the indentor 18 and causes the deflection strip 11 to be deflected by the lever 12 of the multiplier. In the initial position, when the indentor 18 is lying on the surface of the test sample 3, the rod 16 is pressed against the indentor 18 by the deformation band 11 over the lever 12 of the multiplier. The lever 12 has in its lower part a spherical cup 22 for centering the rod 16. The rod 16 is provided with a guide rim that limits its axial movement, thereby protecting the content of the capsule 9 and preventing the rod 16 from falling out during the replacement of the indentor 18.

At the beginning of the indentation process, in the region of low load values, the deformation strips 14 of the dynamometer 13 deform elastically first, further the elastic deformation is transferred to the stiffer dynamometer element 13 - the cylinder 15. The deformation strips 14 of the basket type dynamometer 13 which are in a more deformed state than the cylinder 15, increase the discretion of the signal generated by the strain gauges 10, thereby achieving greater accuracy in measuring low loads. Larger loads are then registered by the strain gauges 10 of the cylinder 15. The signal generated by the strain gauges 10 is recorded by an analog signal amplifier 2 and stored in a computer 1. The opening at the top of the dynamometer 13 serves for positioning the capsule 9 and during the indentation process. Another modification of the dynamometer 13 is a cylindrical type dynamometer, which has a simpler design and is mainly intended for measuring higher loads. The strain gauges 10 are in this case placed on its outer surface.

The displacement sensor capsule 9 is intended not only for measuring the displacement of the indentor 18 and preventing mechanical damage to its contents, but also captures the dynamometer 13 even after unloading the measuring device 4 and during replacement of the indentor 18. The capsule 9 is a separate element of the measuring device 4 content, repair or replacement in the event of damage. The signal of the strain gauges 10 connected to the lever type deformation tape 11 is generated by deflection of the deformation tape 11 by the operating device and is continuously registered by the analog signal amplifier 2 and stored in the computer 1. The deformation tape H pressed by the lever 12 to the upper part of the capsule 9 The spherical bowl 22 on the underside of the lever 12 serves to center the rod 16. By means of the designed capsule lever system 9, the accuracy of measuring the small displacements of the indentor 18 during the ongoing test is increased. Another modification of the displacement sensor capsule 9 is a capsule 9 comprising a bridge-type deformation tape 11, a spherical cup 22, a strain gauge sensor 10 and an acoustic emission sensor 20. The capsule 9 has a simpler design and is mainly intended for measuring larger displacements. A modification of the displacement sensor 9 of the displacement transducer with arm-type deformation tape JT is shown in FIG. 4 (c). It consists of a spherical cup 22, strain gauge sensors 10 and acoustic emission sensor 20, is of a simpler design and is mainly intended for measuring larger displacements.

-5GB 304637 B6

The metering device also includes an acoustic emission sensor 20, thereby expanding its capabilities. For example, determining load parameters that correspond to limit states and material failure is not always possible when studying the properties of systems such as substrate / coating. This problem is solved by the present invention by recording the acoustic emission (mV) signal during indentation, which is generated by the test sample 3 when reaching the limit states and is registered by the analog signal amplifier 2 and stored in the computer i. during its phase transformations. The acoustic emission sensor 20 is located on the deformation tape 12 in the displacement sensor capsule 9 directly above the spherical bowl 22. The acoustic emission sensor 20 is located in the housing lid 19 of the measuring device 4 to increase its sensitivity to processes running under the indentor 18 in the test sample 3.

The measuring system is used together with a load mechanism 5 which is connected to the measuring device 4 by means of an adapter 7. In FIG. 6 (a) shows a variant of using a hardness tester 26 as a loading mechanism 5. FIG. 6 (b) shows a variant of using the tearing machine 27 as a loading mechanism 6. FIG. 6 (c) shows a variant of the use of the piezoelectric element 28 as a loading mechanism 5. FIG. 6 (d) shows a variant of the load mechanism 5 with lever transmission 29. For example, an electric motor can be used as the load mechanism itself.

Industrial applicability

The indentor indentor indentation indentation test system of the present invention will find application in test rooms, laboratories and the like.

Mgr. Maxim Puchnin, Mgr. Evgeniy Anisimov, Ph.D.

GOST 18835-73

GOST 22762-77

ASTM WK381

Anisimov Evgeniy, Puchnin Maxim: Reduction of Elastic Module of Titanium Alloy Ti-6A14V by Quenching, in Book of Abstracts, Local Mechanical Properties, 2012, Slovak Republic, ISBN 978 80 553 1163 0.

Puchnin Maxim, Anisimov Evgeniy: The Method of Accounting of Elastic Deformation Occur During the Automated Packages of the Indentation Test, in Conferrence Proceedings, COMAT, 2012, Czech Republic, ISBN 978-80-87294-34-5.

Degtyarev V.I., Lagveshkin V.Ya. Perenosnaya tenzometricheskaya golovka dlya opredeleniya mehanicheskih svoystv metallov vdavlivaniem, Izmeritelnaya tehnika, 1982, number 5, USSR, ISSN 0368 1025.

N.H. Faisal, J.A. Steel The Use of Acoustic Emission to Characterize Fracture Behavior During Vickers Indentation of HVOF Thermally Sprayed WC-Co Coatings, Journal of Therman Spray Technology, Vol. 18 (4), pp. 525-535, (2009).

Markus G. R. Sause, Daniel Schultheip Acoustic emission investigation of coating fracture and delamination in hybrid carbon fiber reinforced plastic structures, Journal of Acoustic Emission, Vol. 26, ρ. 1 to 13, (2008).

US 2,839,917 (Webster) June 24, 1958. US 3,367,174 (Affri) 06/02/1968.

US 3,934,463 (Vanderjagt) January 27, 1976.

-6GB 304637 B6

US 4,034,603 (Leeb) July 12, 1977.

US 4,059,990 (Glover) November 29, 1977.

US 4,103,538 (Stoferle) August 1, 1978.

US 4,159,640 (Lévéque) July 3, 1979.

US 4,182,164 (Fohey) 08/01/1980.

US 4,245,496 (Napetschnig) January 20, 1981. U.S. Pat. No. 4,304,123 (Ashinger) 08.12.1981.

US 4,312,220 (Borgersen) January 26, 1982.

US 4,435,976 (Edward) March 13, 1984.

US 4,534,212 (Targosz) August 13, 1985.

US 4,535,623 (Gilberto) August 20, 1985.

US 4,611,487 (Kreen) September 16, 1986.

US 4,635,471 (Rogers) January 13, 1987.

US 4,856,326 (Tsukomoto) August 15, 1989.

US 5,616,857 (Merck) April 1, 1997. PCT / USOO / 09940 (White) 13.04.1999.

US 6,026,677 (Bonin) 22/02/2000. PCT / KR02 / 01351 (Lee) 18.07.2002.

US 6,755,075 B2 (Nagashitna) January 29, 2004. US 6,718,820 (Kwon) April 13, 2004. PCT / IB2005 / 002275 (Beghini) August 1, 2005. US 7,066,013 B2 (Wu) 27.06.2006.

US 2009/0107221 Al (Emts) 04/30/2009. EP2 390,649 Al (Sakuma) 18.01.2010.

EP 2,345,884 A2 (Sawa) 06.01.2011.

US 2011/0132078 Al (Wu) 2011-06-09.

Claims (7)

PATENT CLAIMS A measuring system for inductor indentation non-destructive testing, comprising a test mechanism (5) load mechanism (5) and a measuring device (4) provided with a displacement sensor (9) and a load sensor (13), characterized in that the measuring device (4) comprising a housing (6) housing an adapter (7) with a spring (8) and a displacement sensor (9) provided with a strain gauge sensor (10) and a deformation strip (11) and a load sensor (13) provided with deformation stripes (14) a cylinder (15) and a rod (16) extending from the indentor (18) located in the holder (17) to the displacement sensor (9). The measuring system according to claim 1, characterized in that the loading mechanism (5) consists of a Brinell, Vickers, Rockwell hardness tester (26), a universal tear-off machine (27), a lever mechanism (29) with its own load source or piezoelectric element (28). -7EN 304637 B6 The measuring system according to claim 1 or 2, characterized in that the displacement sensor (9) is a replaceable capsule comprising a lever multiplier (12) of a linear displacement indentor (18) with a spherical cup (22) for receiving the rod (16). and strain gauges (10) are connected to the deformation tapes (11) to generate a signal (mV) as a function of their elastic deformation, to register them in an analog signal amplifier (2) and to store them in a computer (1). The measuring system according to claim 1 or 2, characterized in that the displacement sensor comprises a replaceable capsule (9) comprising a deformation bridge (11) with a spherical cup (22) for receiving the rod (16) and a strain gauge (10). . The measuring system according to claim 1 or 2, characterized in that the displacement sensor comprises a replaceable capsule (9) comprising an arm-shaped deformation strip (11) provided with a spherical cup (22) for receiving the rod (16) and a strain-gauge sensor. (10). The measuring system according to any one of the preceding claims, characterized in that the load cell is formed by a replaceable dynamometer (13) which is provided with deformation tapes (14) with strain gauges (10) for measuring low load values and a motion roller (15). ) with strain gauges (10), the strain gauges (10) being connected to an analog signal amplifier (2) and a computer (1). Measuring system according to any one of the preceding claims, characterized in that it is provided with a housing cover (19) and an acoustic emission sensor (20) for measuring the acoustic signal, for its registration by an analog signal amplifier (2) and for storage in a computer (1). ).