Device and method for detecting elastic modulus and thickness of special equipment steel

Abstract

The application discloses a kind of detection device and method of elastic modulus and thickness of special equipment steel material, it is related to the technical field of special equipment steel material detection, solve the problem that existing detection device and method are difficult to detect the elastic modulus of unknown thickness steel material, comprising: detection device one and detection device two, detection device one is used to realize the speed detection of ultrasonic surface wave of the metal material to be detected;Via detection device one detection and leave mark point metal material again via detection device two detection;Detection device two is used to realize the speed detection of ultrasonic transverse wave and the speed detection of ultrasonic longitudinal wave of metal material mark point position.The application sequentially carries out the speed detection of ultrasonic surface wave, the speed detection of ultrasonic transverse wave and the speed detection of ultrasonic longitudinal wave to the surface to be detected of special equipment steel material, obtains the thickness of detection point by calculation, and then obtains the elastic modulus of special equipment steel material by calculation, realizes the acquisition of the elastic modulus of special equipment steel material of unknown thickness.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of special equipment steel detection, and particularly relates to a special equipment steel elastic modulus and thickness detection device and method. BACKGROUND

[0002] Special equipment is usually complex in working condition, and has great danger to personal safety and property safety. Once an accident occurs, it may cause disastrous consequences. Steel is the main material used in the manufacture of special equipment. Due to long-term use in high temperature, high pressure and corrosive environment, phenomena such as spheroidization, graphitization, decarburization and embrittlement of the material may occur. Material deterioration and material micro-damage may change the elastic modulus of the steel. Under the corrosion of corrosive medium and environment, and the scouring action of the medium, the thickness of the steel of the special equipment may also be reduced during use. Therefore, the elastic modulus and wall thickness of the special equipment steel are two key detection indexes during the use of the special equipment, and are directly related to the safety of the special equipment in use.

[0003] In terms of elastic modulus detection, the commonly used detection methods include static method, dynamic method and ultrasonic method. Among them, the static method is destructive detection, and the dynamic method is affected by the support of the special equipment. Only the ultrasonic method can realize non-destructive detection of the elastic modulus of the special equipment steel. In the invention patent CN110261485A, a method for measuring the elastic modulus and Poisson's ratio of each part inside the material by ultrasonic wave is disclosed. The method is based on the measurement of the elastic modulus under the condition that the thickness of the material is known. However, the thickness of the special equipment in use is unknown, and it is usually impossible to measure it with a ruler such as a vernier caliper. Therefore, the method disclosed in the patent cannot realize the detection of the elastic modulus of the special equipment steel. SUMMARY

[0004] In view of the above problems that the existing detection device and method are difficult to detect the elastic modulus of the steel with unknown thickness, the purpose of the present application is to provide a special equipment steel elastic modulus and thickness detection device and method, which can realize the detection of the elastic modulus and thickness of the special equipment steel.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] A special equipment steel elastic modulus and thickness detection device, comprising: a detection device one and a detection device two, the detection device one is used to realize the speed of the ultrasonic surface wave of the metal material to be detected;

[0007] The metal material detected by the detection device one and marked with a mark point is detected by the detection device two;

[0008] The detection device two is used to realize the speed of the ultrasonic transverse wave of the mark point position of the metal material. detecting and the speed of the ultrasonic longitudinal wave detecting.

[0009] The detection device for the elastic modulus and thickness of the special equipment steel material, wherein the detection device one comprises an electromagnetic ultrasonic surface wave excitation sensor 1, an electromagnetic ultrasonic surface wave receiving sensor 2, a support frame 3, a short handle locking screw 4 and a long handle locking screw 5, the support frame 3 is arranged on the surface of the metal material to be detected; the support frame 3 is provided with a through hole one a and a through hole two b, the left end of the support frame 3 is provided with a threaded hole in communication with the through hole one a, the right end of the support frame 3 is provided with a threaded hole in communication with the through hole two b, the short handle locking screw 4 is assembled in the threaded hole at the left end of the support frame 3, and the long handle locking screw 5 is assembled in the threaded hole at the right end of the support frame 3.

[0010] The electromagnetic ultrasonic surface wave excitation sensor 1 and the electromagnetic ultrasonic surface wave receiving sensor 2 are arranged on the surface of the metal material to be detected.

[0011] The electromagnetic ultrasonic surface wave excitation sensor 1 is arranged in the through hole one a, and the short handle locking screw 4 is used for limiting the electromagnetic ultrasonic surface wave excitation sensor 1; the electromagnetic ultrasonic surface wave receiving sensor 2 is arranged in the through hole two b, and the long handle locking screw 5 is used for limiting the electromagnetic ultrasonic surface wave receiving sensor 2.

[0012] The detection device for the elastic modulus and thickness of the special equipment steel material, wherein the detection device one further comprises a marker pen 6, the support frame 3 is provided with the marker pen 6, the marker pen 6 is arranged between the through hole one a and the through hole two b, and the marker pen 6 is used for leaving a mark point on the surface of the metal material to be detected.

[0013] The detection device for the elastic modulus and thickness of the special equipment steel material, wherein the detection device two comprises a body 7, a displacement scale 8, a screw one 9, a nut 10, a screw two 11 and a permanent magnet base 12, a rectangular through hole is formed in the middle of the body 7, the displacement scale 8 is connected to the four edges of the rectangular through hole on the top surface of the body 7, a threaded hole in communication with the rectangular through hole is formed in the middle of each side of the body 7, and a screw one 9 is assembled in each threaded hole; the four screw ones 9 are used for limiting the excitation and receiving integrated electromagnetic ultrasonic transverse wave sensor or the excitation and receiving integrated electromagnetic ultrasonic longitudinal wave sensor; a nut 10 is connected to each corner of the bottom surface of the body 7, the upper end of each screw two 11 is threadedly connected with a nut 10, and the lower end of each screw two 11 is connected with a permanent magnet base 12.

[0014] The elastic modulus and thickness detection device for special equipment steel material, wherein the short handle locking screw rod 4, the long handle locking screw rod 5 and the marker pen 6 can move along the axis thereof, the short handle locking screw rod 4 is used to realize the displacement of the electromagnetic ultrasonic surface wave excitation sensor 1 in the through hole a along the left and right directions, and the long handle locking screw rod 5 is used to realize the displacement of the electromagnetic ultrasonic surface wave receiving sensor 2 in the through hole b along the left and right directions; the short handle locking screw rod 4 and the long handle locking screw rod 5 are located on the same axis, and the marker pen 6 is perpendicular to the short handle locking screw rod 4 and the long handle locking screw rod 5.

[0015] The elastic modulus and thickness detection device for special equipment steel material, wherein the two screw rods 9 located on the front and rear sides are located on the same axis, and the two screw rods 9 located on the left and right sides are located on the same axis.

[0016] A method for detecting the elastic modulus and thickness of special equipment steel material, which is suitable for the elastic modulus and thickness detection device for special equipment steel material, and comprises the following steps: detecting the speed of the ultrasonic surface wave, detecting the speed of the ultrasonic transverse wave, and detecting the speed of the ultrasonic longitudinal wave, and calculating the elastic modulus and thickness of the special equipment steel material.

[0017] The method for detecting the elastic modulus and thickness of special equipment steel material, wherein the method for detecting the speed of the ultrasonic surface wave comprises the following steps:

[0018] A1: selecting a detection position where the thickness of the metal material to be detected is prone to be reduced, placing the support frame 3 on the surface of the metal material to be detected, and making the marker pen 6 in a suspended state without contacting the surface of the metal material to be detected;

[0019] A2: abutting the right surface of the electromagnetic ultrasonic surface wave receiving sensor 2 with the right surface of the through hole b of the support frame 3;

[0020] A3: abutting the right surface of the electromagnetic ultrasonic surface wave excitation sensor 1 with the right surface of the through hole a of the support frame 3;

[0021] A4: rotating the short handle locking screw rod 4 to press the electromagnetic ultrasonic surface wave excitation sensor 1, so that the right surface of the electromagnetic ultrasonic surface wave excitation sensor 1 is closely abutted with the right surface of the through hole a of the support frame 3, and the right surface of the electromagnetic ultrasonic surface wave receiving sensor 2 is closely abutbed with the right surface of the through hole b of the support frame 3;

[0022] A5: recording the time waveform diagram of the surface wave signal received by the electromagnetic ultrasonic surface wave receiving sensor 2, and finding the time t1 corresponding to the surface wave peak signal; ​​​

[0023] A6: The left surface of the electromagnetic ultrasonic surface wave receiving sensor 2 is attached to the left surface of the through hole two b of the support frame 3, and the long handle locking screw 5 is rotated to press the electromagnetic ultrasonic surface wave receiving sensor 2, so that the left surface of the electromagnetic ultrasonic surface wave receiving sensor 2 is tightly attached to the left surface of the through hole two b of the support frame 3;

[0024] A7: The time waveform diagram of the surface wave signal received by the electromagnetic ultrasonic surface wave receiving sensor 2 is recorded again, and the time t2 corresponding to the surface wave peak signal is found;

[0025] A8: The width s1 of the left and right surfaces of the through hole two b on the support frame 3 and the width s2 of the electromagnetic ultrasonic surface wave receiving sensor 2 are accurately measured by using the caliper;

[0026] A9: The propagation speed of the ultrasonic surface wave on the surface of the metal material to be detected is calculated ;

[0027]

[0028] A10: The marker pen 6 is moved downward and contacts the surface of the metal material to be detected, and a mark point is left.

[0029] The above-mentioned detection method of the elastic modulus and the thickness of the special equipment steel material, wherein the speed of the ultrasonic transverse wave The detection method and the speed of the ultrasonic longitudinal wave The detection method and the calculation of the elastic modulus of the special equipment steel material And the thickness Comprise:

[0030] B1: Adjust the permanent magnet base 12 to make the body 7 at a suitable height, rotate the four screw rods one 9 to make the mark point just at the center position of the body 7, and fix the body 7 on the surface of the metal material to be detected by using the permanent magnet base 12;

[0031] B2: Measure the structural size of the excitation and receiving integrated electromagnetic ultrasonic transverse wave sensor, move the four screw rods one 9 outward by the same distance by means of the displacement scale 8 on the body 7, and stop moving the screw rod one 9 when the moving distance can just put in the excitation and receiving integrated electromagnetic ultrasonic transverse wave sensor;

[0032] B3: Put the excitation and receiving integrated electromagnetic ultrasonic transverse wave sensor into the center of the body 7, the center of the excitation and receiving integrated electromagnetic ultrasonic transverse wave sensor coincides with the center of the mark point, use the excitation and receiving integrated electromagnetic ultrasonic transverse wave sensor to excite the ultrasonic transverse wave signal, record the time waveform diagram of the received ultrasonic transverse wave signal, and calculate the time difference of the time corresponding to the adjacent two groups of signal peaks ;

[0033] B4: remove the excitation-reception integrated electromagnetic ultrasonic transverse wave sensor, measure the structural size of the excitation-reception integrated electromagnetic ultrasonic longitudinal wave sensor, move the four screw rods 9 outwards by the same distance by means of the displacement scale 8 on the body 7, and stop moving the screw rod 9 when the distance of movement is just enough to put in the excitation-reception integrated electromagnetic ultrasonic longitudinal wave sensor;

[0034] B5: apply coupling agent at the marked point position, put the excitation-reception integrated electromagnetic ultrasonic longitudinal wave sensor into the center of the body 7, the center of the excitation-reception integrated electromagnetic ultrasonic longitudinal wave sensor coincides with the center of the marked point, use the excitation-reception integrated electromagnetic ultrasonic longitudinal wave sensor to excite ultrasonic longitudinal wave signal and record the time waveform of the received ultrasonic longitudinal wave signal, calculate the time difference of the time corresponding to the wave peaks of the adjacent two groups of signals

[0035] B6: calculate the thickness of the special equipment steel material

[0036] The speed of ultrasonic wave in the steel material conforms to the following formula:

[0037]

[0038] In the formula:

[0039] is the speed of ultrasonic surface wave, is the speed of ultrasonic transverse wave, is the speed of ultrasonic longitudinal wave;

[0040] The thickness of the steel material is , then:

[0041]

[0042]

[0043] The speed of ultrasonic surface wave , the time difference and the time difference are known quantities, and the thickness of the steel material is obtained by solving the above formula , the speed of ultrasonic transverse wave and the speed of ultrasonic longitudinal wave ;

[0044] B7: calculate the elastic modulus of the special equipment steel material

[0045] The speed formula of ultrasonic transverse wave can be expressed as:

[0046]

[0047] In the formula:​​​ is one of the elastic constants of the steel material, is the density of the steel material;

[0048] The velocity formula of the ultrasonic longitudinal wave can be expressed as:

[0049]

[0050] In the formula, is one of the elastic constants of the steel material;

[0051] Elastic constant and There is the following relationship:

[0052]

[0053] In the formula, is the Poisson's ratio of the steel material;

[0054] The Poisson's ratio is obtained by solving the above formula.

[0055] Elastic modulus Poisson's ratio and elastic constant satisfy the following relationship:

[0056]

[0057] The data of the elastic constant and the Poisson's ratio are substituted into the formula to calculate the elastic modulus of the special equipment steel material.

[0058] The present application has the following positive effects compared with the prior art due to the adoption of the above technology:

[0059] (1) The present application can realize non-destructive testing of the elastic modulus of the special equipment steel material with unknown thickness.

[0060] (2) The present application realizes the acquisition of the elastic modulus of the special equipment steel material with unknown thickness by sequentially detecting the velocity of the ultrasonic surface wave, the velocity of the ultrasonic transverse wave and the velocity of the ultrasonic longitudinal wave on the surface of the special equipment steel material to be detected, and then calculating the thickness of the detection point and the elastic modulus of the special equipment steel material. BRIEF DESCRIPTION OF DRAWINGS

[0061] Figure 1 is an embodiment of the detection device of the special equipment steel material elastic modulus and thickness detection device of the present application Figure 1 .

[0062] Figure 2It is a kind of special equipment steel modulus of elasticity and thickness of detection device of detection device one of the embodiment of the application Figure 2 .

[0063] Figure 3 It is the structural diagram of detection device two of the detection device of a kind of special equipment steel modulus of elasticity and thickness of the application.

[0064] Figure 4 It is the embodiment of detection device two of the detection device of a kind of special equipment steel modulus of elasticity and thickness of the application Figure 1 .

[0065] Figure 2 It is the embodiment of detection device two of the detection device of a kind of special equipment steel modulus of elasticity and thickness of the application Figures 1 to 5 .

[0066] In the drawing: 1, electromagnetic ultrasonic surface wave excitation sensor;2, electromagnetic ultrasonic surface wave receiving sensor;3, support frame;a, through hole one;B, through hole two;4, short handle locking screw;5, long handle locking screw;6, marker pen;7, body;8, displacement scale;9, screw one;10, nut;11, screw two;12, permanent magnet base;13, marking point;14, sensor. Specific embodiments

[0067] The application will be further described below in conjunction with the drawings and specific embodiments, but not as the limitation of the application.

[0068] Please refer to Figure 1 It shows a kind of special equipment steel modulus of elasticity and thickness of detection device, wherein, including: detection device one and detection device two, detection device one is used to realize the speed Detection of ultrasonic surface wave of the metal material to be detected;

[0069] Metal material detected by detection device one and left marking point is detected by detection device two again;

[0070] Detection device two is used to realize the speed Detection of ultrasonic transverse wave of metal material marking point position and the speed Detection of ultrasonic longitudinal wave.

[0071] Further, in a preferred embodiment, the detection device one comprises: an electromagnetic ultrasonic surface wave excitation sensor 1, an electromagnetic ultrasonic surface wave receiving sensor 2, a support frame 3, a short handle locking screw 4 and a long handle locking screw 5, the support frame 3 is placed on the surface of the metal material to be detected; the support frame 3 is provided with a through hole one a and a through hole two b, the left end of the support frame 3 is provided with a threaded hole in communication with the through hole one a, the left end of the support frame 3 is provided with a threaded hole in communication with the through hole two b, the short handle locking screw 4 is assembled in the threaded hole at the left end of the support frame 3, and the long handle locking screw 5 is assembled in the threaded hole at the right end of the support frame 3;

[0072] The electromagnetic ultrasonic surface wave excitation sensor 1 and the electromagnetic ultrasonic surface wave receiving sensor 2 are both placed on the surface of the metal material to be detected;

[0073] The electromagnetic ultrasonic surface wave excitation sensor 1 is arranged in the through hole one a, and the short handle locking screw 4 is used for limiting the electromagnetic ultrasonic surface wave excitation sensor 1; the electromagnetic ultrasonic surface wave receiving sensor 2 is arranged in the through hole two b, and the long handle locking screw 5 is used for limiting the electromagnetic ultrasonic surface wave receiving sensor 2.

[0074] Further, in a preferred embodiment, the detection device one comprises: an electromagnetic ultrasonic surface wave excitation sensor 1, an electromagnetic ultrasonic surface wave receiving sensor 2, a support frame 3, a short handle locking screw 4 and a long handle locking screw 5, the support frame 3 is placed on the surface of the metal material to be detected; the support frame 3 is provided with a through hole one a and a through hole two b, the left end of the support frame 3 is provided with a threaded hole in communication with the through hole one a, the left end of the support frame 3 is provided with a threaded hole in communication with the through hole two b, the short handle locking screw 4 is assembled in the threaded hole at the left end of the support frame 3, and the long handle locking screw 5 is assembled in the threaded hole at the right end of the support frame 3;

[0075] Further, in a preferred embodiment, the detection device two comprises: a body 7, a displacement scale 8, a screw one 9, a nut 10, a screw two 11 and a permanent magnet base 12, a rectangular through hole is formed in the middle of the body 7, the displacement scale 8 is connected along the four edges of the rectangular through hole on the top surface of the body 7, a threaded hole in communication with the rectangular through hole is formed in the middle of each side edge of the body 7, and a screw one 9 is assembled in each threaded hole; the four screw ones 9 are used for limiting the excitation and receiving integrated electromagnetic ultrasonic transverse wave sensor or the excitation and receiving integrated electromagnetic ultrasonic longitudinal wave sensor; a nut 10 is connected to each corner of the bottom surface of the body 7, the upper end of each screw two 11 is threadedly connected with a nut 10, and the lower end of each screw two 11 is connected with a permanent magnet base 12.

[0076] Further, in a preferred embodiment, the short handle locking screw 4, the long handle locking screw 5 and the marker pen 6 can move along their own axes, the short handle locking screw 4 is used to realize the displacement of the electromagnetic ultrasonic surface wave excitation sensor 1 in the through hole one a in the left and right directions, the long handle locking screw 5 is used to realize the displacement of the electromagnetic ultrasonic surface wave receiving sensor 2 in the through hole two b in the left and right directions; the short handle locking screw 4 and the long handle locking screw 5 are located on the same axis, and the marker pen 6 is perpendicular to the short handle locking screw 4 and the long handle locking screw 5.

[0077] Further, in a preferred embodiment, the two screw rods 9 located at the front and back sides are located on the same axis; the two screw rods 9 located at the left and right sides are located on the same axis.

[0078] A method for detecting the elastic modulus and thickness of special equipment steel material, applicable to a device for detecting the elastic modulus and thickness of special equipment steel material, wherein the method comprises detecting the velocity of an ultrasonic surface wave , detecting the velocity of an ultrasonic transverse wave , and detecting the velocity of an ultrasonic longitudinal wave , and calculating the elastic modulus and thickness of the special equipment steel material . .

[0079] Further, in a preferred embodiment, the method for detecting the velocity of an ultrasonic surface wave comprises the following steps:

[0080] A1: Select a detection position where the thickness of the metal material to be detected is prone to decrease, place the support frame 3 on the surface of the metal material to be detected, and make the marker pen 6 in a suspended state without contacting the surface of the metal material to be detected;

[0081] A2: Bond the right surface of the electromagnetic ultrasonic surface wave receiving sensor 2 with the right surface of the through hole two b of the support frame 3;

[0082] A3: Bond the right surface of the electromagnetic ultrasonic surface wave excitation sensor 1 with the right surface of the through hole one a of the support frame 3;

[0083] A4: Rotate the short handle locking screw rod 4 to press the electromagnetic ultrasonic surface wave excitation sensor 1, so that the right surface of the electromagnetic ultrasonic surface wave excitation sensor 1 is tightly bonded with the right surface of the through hole one a of the support frame 3, and in this process, ensure that the right surface of the electromagnetic ultrasonic surface wave receiving sensor 2 is tightly bonded with the right surface of the through hole two b of the support frame 3; as shown in Figure 2 ;

[0084] A5: Record the time waveform diagram of the surface wave signal received by the electromagnetic ultrasonic surface wave receiving sensor 2, and find the time t1 corresponding to the surface wave peak signal;

[0085] A6: Bond the left surface of the electromagnetic ultrasonic surface wave receiving sensor 2 with the left surface of the through hole two b of the support frame 3, and rotate the long handle locking screw rod 5 to press the electromagnetic ultrasonic surface wave receiving sensor 2, so that the left surface of the electromagnetic ultrasonic surface wave receiving sensor 2 is tightly bonded with the left surface of the through hole two b of the support frame 3; as shown in Figure 4 ;

[0086] A7: Record the time waveform diagram of the surface wave signal received by the electromagnetic ultrasonic surface wave receiving sensor 2 again, and find the time t2 corresponding to the surface wave peak signal;

[0087] A8: Use calipers to accurately measure the width s1 of the left and right sides of the through hole 2b on the support frame 3 and the width s2 of the electromagnetic ultrasonic surface wave receiving sensor 2.

[0088] A9: Calculate the propagation speed of ultrasonic surface waves on the surface of the metal material to be tested. ;

[0089]

[0090] A10: Move the marker pen 6 downwards and make contact with the surface of the metal material to be tested, leaving a mark.

[0091] Furthermore, in a preferred embodiment, the velocity of the ultrasonic shear wave... Detection methods and the velocity of ultrasonic longitudinal waves Testing methods and calculation of the elastic modulus of special equipment steel and thickness include:

[0092] B1: Adjust the permanent magnet base 12 to position the main body 7 at a suitable height. By rotating the four screws 9, the marking point is positioned exactly at the center of the main body 7. Use the permanent magnet base 12 to fix the main body 7 to the surface of the metal material to be tested. Figure 5 As shown;

[0093] B2: Measure the structural dimensions of the integrated electromagnetic ultrasonic transverse wave sensor for excitation and reception. Using the displacement scale 8 on the main body 7, move the four screws 9 outward by the same distance. When the distance moved is just enough to fit the integrated electromagnetic ultrasonic transverse wave sensor for excitation and reception, stop moving the screws 9.

[0094] B3: Place the integrated excitation and reception electromagnetic ultrasonic shear wave sensor in the center of the main body 7, ensuring the center of the sensor coincides with the center of the marker point. Figure 5 As shown; an integrated excitation and reception electromagnetic ultrasonic shear wave sensor is used to excite ultrasonic shear wave signals, and the time waveform of the received ultrasonic shear wave signals is recorded. The time difference between the corresponding moments of two adjacent signal peaks is calculated. ;

[0095] B4: Remove the integrated electromagnetic ultrasonic transverse wave sensor and measure the structural dimensions of the integrated electromagnetic ultrasonic longitudinal wave sensor. Using the displacement scale 8 on the main body 7, move the four screws 9 outward by the same distance. When the distance moved is just enough to fit the integrated electromagnetic ultrasonic longitudinal wave sensor, stop moving the screws 9.

[0096] B5: Apply coupling agent at the marker point position, place the excitation-reception integrated electromagnetic ultrasonic longitudinal wave sensor in the center of the body 7, the center of the excitation-reception integrated electromagnetic ultrasonic longitudinal wave sensor coincides with the center of the marker point, as shown in Figure 1 ; use the excitation-reception integrated electromagnetic ultrasonic longitudinal wave sensor to excite ultrasonic longitudinal wave signals and record the time waveform of the received ultrasonic longitudinal wave signals, calculate the time difference of the corresponding time of the two adjacent groups of signal wave peaks ;

[0097] B6: Calculate the thickness of the special equipment steel material ;

[0098] The speed of ultrasonic wave in steel material conforms to the following formula:

[0099]

[0100] In the formula:

[0101] is the speed of ultrasonic surface wave, is the speed of ultrasonic transverse wave, is the speed of ultrasonic longitudinal wave;

[0102] The thickness of the steel material is , then:

[0103]

[0104]

[0105] The speed of ultrasonic surface wave , the time difference and the time difference are known quantities, and the thickness of the steel material is obtained by solving the above formula , the speed of ultrasonic transverse wave and the speed of ultrasonic longitudinal wave ;

[0106] B7: Calculate the elastic modulus of the special equipment steel material ;

[0107] The speed formula of ultrasonic transverse wave can be expressed as:

[0108]

[0109] In the formula: is one of the elastic constants of the steel material, is the density of the steel material;

[0110] The speed formula of ultrasonic longitudinal wave can be expressed as:

[0111]

[0112] In the formula: is one of the elastic constants of the steel material;

[0113] Elastic constant and There is a relationship as follows:

[0114]

[0115] In the formula: is the Poisson's ratio of the steel material;

[0116] The Poisson's ratio is obtained by solving the above formula ;

[0117] Elastic modulus and Poisson's ratio and elastic constant satisfy the following relationship:

[0118]

[0119] The data of the elastic constant and the Poisson's ratio are substituted into the formula to calculate the elastic modulus of the special equipment steel material.

[0120] The above is only a preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application.

[0121] The present application further has the following implementation based on the above:

[0122] In a further embodiment of the present application, the propagation speed of ultrasonic waves in a metal material is directly related to the elastic modulus.

[0123] In a further embodiment of the present application, as shown in Figure 3 , the detection device one, the support frame 3 has a through hole one a and a through hole two b, the electromagnetic ultrasonic surface wave excitation sensor 1 and the electromagnetic ultrasonic surface wave receiving sensor 2 are respectively fixed on the support frame 3 through the short handle locking screw 4 and the long handle locking screw 5. The short handle locking screw 4 can move left and right through the threaded hole on the left side of the support frame 3. The long handle locking screw 5 can move left and right through the threaded hole on the right side of the support frame 3. The marker pen 6 can move up and down.

[0124] In a further embodiment of the present application, as shown in Figure 1 , the detection device two, the four screw rods one 9 can move through the threaded holes on the body 7; the screw rod two 11 is locked with the body 7 by the nut 10; the four permanent magnet bases 12 have threaded holes, and the height of the body 7 can be adjusted by rotating the permanent magnet base 12.

[0125] In further embodiments of the present application, the detecting step and the calculating:

[0126] 1) As Figure 2 , the detection position prone to thickness reduction is selected, the support frame 3 is placed on the surface of the metal material to be detected, and the marker pen 6 is in a suspended state without contacting the surface to be detected;

[0127] 2) The right surface of the electromagnetic ultrasonic surface wave receiving sensor 2 is attached to the right surface of the through hole b of the support frame 3;

[0128] 3) The right surface of the electromagnetic ultrasonic surface wave excitation sensor 1 is attached to the right surface of the through hole a of the support frame 3;

[0129] 4) The short handle locking screw 4 is rotated to tightly attach the right surface of the electromagnetic ultrasonic surface wave excitation sensor 1 to the right surface of the through hole a of the support frame 3. In this process, the electromagnetic ultrasonic surface wave excitation sensor 1 is attracted to the surface of the steel material under the action of the magnetic force, and the support frame 3 moves to the left under the action of the reaction force of the short handle locking screw 4, and the right surface of the through hole b moves to the left and tightly attaches to the right surface of the electromagnetic ultrasonic surface wave receiving sensor 2;

[0130] 5) The time waveform graph of the surface wave signal received by the electromagnetic ultrasonic surface wave receiving sensor 2 is recorded, and the time t1 corresponding to the surface wave peak signal is found;

[0131] 6) As Figure 4 , the left surface of the electromagnetic ultrasonic surface wave receiving sensor 2 is attached to the left surface of the through hole b of the support frame 3, and the long handle locking screw 5 is rotated to further tightly attach the left surface of the electromagnetic ultrasonic surface wave receiving sensor 2 to the left surface of the through hole b of the support frame 3;

[0132] 7) The time waveform graph of the surface wave signal received by the electromagnetic ultrasonic surface wave receiving sensor 2 is recorded again, and the time t2 corresponding to the surface wave peak signal is found;

[0133] 8) The width s1 of the left and right surfaces of the through hole b on the support frame 3 and the width s2 of the electromagnetic ultrasonic surface wave receiving sensor 2 are accurately measured by the caliper;

[0134] 9) According to formula (1), the propagation speed of the ultrasonic surface wave on the surface of the special equipment steel material can be calculated ;

[0135] (1)

[0136] 10) The surface wave propagates on the surface of the steel material to be detected, and the propagation speed Not affected by the thickness of the steel. But the measurement process of the transverse wave sensor and the longitudinal wave sensor is affected by the thickness of the steel. The steel of special equipment may be unevenly thinned during use due to medium scouring and corrosion. Therefore, the measurement positions of the transverse wave sensor and the longitudinal wave sensor must be exactly the same to reduce the measurement error caused by thickness unevenness. Move the marker pen 6 downward and make it contact with the surface to be measured, and leave a mark point.

[0137] 11) As Figure 5 , adjust the permanent magnet base 12 to place the body 7 at the appropriate height, and make the mark point just in the center position by rotating the four screw rods 9, and fix the body 7 on the steel to be measured by the permanent magnet base 12.

[0138] 12) Measure the structural size of the excitation-receiving integrated electromagnetic ultrasonic transverse wave sensor, move the four screw rods 9 outward by the same distance with the help of the displacement scale 8 on the body 7, stop moving the screw rod 9 when the moving distance is just enough to put in the electromagnetic ultrasonic transverse wave sensor, at this time, the center of the electromagnetic ultrasonic transverse wave sensor coincides with the center of the mark point.

[0139] 13) As ​ , put the excitation-receiving integrated electromagnetic ultrasonic transverse wave sensor into the center of the body 7, the transverse wave excited on the surface of the steel will propagate between the upper and lower surfaces of the steel to be measured and be received by the excitation-receiving integrated electromagnetic ultrasonic transverse wave sensor itself, record the time waveform diagram of the received ultrasonic transverse wave signal, and calculate the time difference of the time corresponding to the adjacent two groups of signal wave peaks .

[0140] 14) Move the excitation-receiving integrated electromagnetic ultrasonic transverse wave sensor away, measure the structural size of the excitation-receiving integrated electromagnetic ultrasonic longitudinal wave sensor, move the four screw rods 9 by the same distance with the help of the displacement scale 8 on the body 7, stop moving the screw rod 9 when the moving distance is just enough to put in the excitation-receiving integrated electromagnetic ultrasonic longitudinal wave sensor, at this time, the center of the excitation-receiving integrated electromagnetic ultrasonic longitudinal wave sensor coincides with the center of the mark point, and the excitation-receiving integrated electromagnetic ultrasonic longitudinal wave sensor measures the same thickness h of the steel as the excitation-receiving integrated electromagnetic ultrasonic transverse wave sensor.

[0141] 15) Apply coupling agent at the mark point position, use the excitation-receiving integrated electromagnetic ultrasonic longitudinal wave sensor to excite ultrasonic longitudinal wave signals, which propagate between the upper and lower surfaces of the steel to be measured and are received by the excitation-receiving integrated electromagnetic ultrasonic longitudinal wave sensor itself, record the time waveform diagram of the received ultrasonic longitudinal wave signal, and calculate the time difference of the time corresponding to the adjacent two groups of signal wave peaks .

[0142] The steel used in special equipment is usually a uniform elastic material, and the speed of ultrasonic waves in the steel conforms to the following formula:

[0143] (2)

[0144] wherein: is the velocity of the ultrasonic surface wave, is the velocity of the ultrasonic transverse wave, is the velocity of the ultrasonic longitudinal wave.

[0145] Let the thickness of the steel material be then

[0146] (3)

[0147] (4)

[0148] By combining equations (3) and (4), we have:

[0149] (5)

[0150] Since the velocity of the ultrasonic surface wave , the time difference and the time difference have been measured and are known quantities, by combining equation (2) and equation (5), we have two equations with two unknowns, which can be solved to obtain the velocity of the ultrasonic transverse wave and the velocity of the ultrasonic longitudinal wave . Substituting the calculated results into equation (3), the thickness of the steel material can be calculated.

[0151] The velocity formula of the ultrasonic transverse wave can be expressed as:

[0152] (6)

[0153] wherein: is one of the elastic constants of the steel material, is the density of the steel material.

[0154] The velocity formula of the ultrasonic longitudinal wave can be expressed as:

[0155] (7)

[0156] wherein: is one of the elastic constants of the steel material.

[0157] The elastic constants and have the following relationship:

[0158] (8)

[0159] wherein: Let be the Poisson's ratio for steel. Then, let the elastic constant be... and Substituting into equation (8), Poisson's ratio can be calculated. elastic modulus Compared with Poisson and elastic constant The following relationship must be satisfied:

[0160] (9)

[0161] elastic constant Compared to Poisson The elastic modulus of special equipment steel can be calculated by substituting the data into equation (9). .

[0162] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for detecting the modulus of elasticity and thickness of special equipment steel material, the detection method being implemented based on a device for detecting the modulus of elasticity and thickness of special equipment steel material, characterized in that, The detection device includes: a first detection device and a second detection device, wherein the first detection device is used to realize the velocity of the ultrasonic surface wave of the metal material to be detected. The detection; The metal material with the mark point detected and left by the detection device one is detected by the detection device two; The detection device two is used for realizing the velocity of ultrasonic transverse wave of the marked point position of the metal material detection and the velocity of ultrasonic longitudinal wave detection The detection device one comprises an electromagnetic ultrasonic surface wave excitation sensor (1), an electromagnetic ultrasonic surface wave receiving sensor (2), a support frame (3), a short handle locking screw (4) and a long handle locking screw (5), and the support frame (3) is placed on the surface of the metal material to be detected; a through hole one (a) and a through hole two (b) are formed in the support frame (3), a threaded hole is formed in the left end of the support frame (3) and communicates with the through hole one (a), a threaded hole is formed in the left end of the support frame (3) and communicates with the through hole two (b), the short handle locking screw (4) is assembled in the threaded hole in the left end of the support frame (3), and the long handle locking screw (5) is assembled in the threaded hole in the right end of the support frame (3); The electromagnetic ultrasonic surface wave excitation sensor (1) and the electromagnetic ultrasonic surface wave receiving sensor (2) are both placed on the surface of the metal material to be detected; The electromagnetic ultrasonic surface wave excitation sensor (1) is arranged in the through hole one (a), and the short handle locking screw (4) is used for limiting the electromagnetic ultrasonic surface wave excitation sensor (1); the electromagnetic ultrasonic surface wave receiving sensor (2) is arranged in the through hole two (b), and the long handle locking screw (5) is used for limiting the electromagnetic ultrasonic surface wave receiving sensor (2); Further comprising a marking pen (6), the support frame (3) is provided with the marking pen (6), the marking pen (6) is arranged between the through hole one (a) and the through hole two (b), and the marking pen (6) is used for leaving a mark point on the surface of the metal material to be detected; The detection device two comprises a body (7), a displacement scale (8), a screw one (9), a nut (10), a screw two (11) and a permanent magnet base (12), a rectangular through hole is formed in the middle of the body (7), the top surface of the body (7) is connected with the displacement scale (8) along the four edges of the rectangular through hole, a threaded hole is formed in the middle of each side of the body (7) and communicates with the rectangular through hole, and a screw one (9) is assembled in each threaded hole; the four screw ones (9) are used for limiting the excitation-receiving integrated electromagnetic ultrasonic transverse wave sensor or the excitation-receiving integrated electromagnetic ultrasonic longitudinal wave sensor; one nut (10) is connected to each corner of the bottom surface of the body (7), the upper end of each screw two (11) is threadedly connected with a nut (10), and the lower end of each screw two (11) is connected with a permanent magnet base (12); The detection method comprises: detecting the velocity of ultrasonic surface wave The detection method comprises: detecting the velocity of ultrasonic surface wave The detection method comprises: detecting the velocity of ultrasonic surface wave The detection method comprises: detecting the velocity of ultrasonic surface wave The detection method comprises: detecting the velocity of ultrasonic surface wave The detection method comprises: detecting the velocity of ultrasonic surface wave The velocity of the ultrasonic surface wave The detection method comprises: A1: selecting a detection position where the thickness of the metal material to be detected is prone to be reduced, placing the support frame (3) on the surface of the metal material to be detected, and making the marking pen (6) in a suspended state without contacting the surface of the metal material to be detected; A2: the right surface of the electromagnetic ultrasonic surface wave receiving sensor (2) is attached to the right surface of the through hole two (b) of the support frame (3); A3: the right surface of the electromagnetic ultrasonic surface wave excitation sensor (1) is attached to the right surface of the through hole one (a) of the support frame (3); A4: Rotate the short handle locking screw (4) to compress the electromagnetic ultrasonic surface wave excitation sensor (1), so that the right surface of the electromagnetic ultrasonic surface wave excitation sensor (1) is tightly attached to the right surface of the through hole one (a) of the support frame (3), and the right surface of the electromagnetic ultrasonic surface wave receiving sensor (2) is tightly attached to the right surface of the through hole two (b) of the support frame (3); A5: Record the time waveform diagram of the surface wave signal received by the electromagnetic ultrasonic surface wave receiving sensor (2), and find the time t1 corresponding to the surface wave peak signal; A6: Attach the left surface of the electromagnetic ultrasonic surface wave receiving sensor (2) to the left surface of the through hole two (b) of the support frame (3), rotate the long handle locking screw (5) to compress the electromagnetic ultrasonic surface wave receiving sensor (2), so that the left surface of the electromagnetic ultrasonic surface wave receiving sensor (2) is tightly attached to the left surface of the through hole two (b) of the support frame (3); A7: Record the time waveform diagram of the surface wave signal received by the electromagnetic ultrasonic surface wave receiving sensor (2) again, and find the time t2 corresponding to the surface wave peak signal; A8: Accurately measure the width s1 of the left and right surfaces of the through hole two (b) on the support frame (3) and the width s2 of the electromagnetic ultrasonic surface wave receiving sensor (2) using a caliper; A9: calculating the propagation speed of ultrasonic surface waves on the surface of the metal material to be detected ; A10: Move the marker pen (6) downward and make contact with the surface of the metal material to be detected, and leave a mark point; The speed of the ultrasonic shear wave Method of detection and speed of ultrasonic longitudinal waves Method of detection and calculation of the modulus of elasticity of steel for special equipment And thickness Comprising: B1: Adjust the permanent magnet base (12) to make the body (7) at a suitable height, rotate the four screw rods one (9) to make the mark point just at the center position of the body (7), and use the permanent magnet base (12) to fix the body (7) on the surface of the metal material to be detected; B2: Measure the structural size of the excitation-receiving integrated electromagnetic ultrasonic transverse wave sensor, move the four screw rods one (9) outward by the same distance with the help of the displacement scale (8) on the body (7), and stop moving the screw rod one (9) when the moving distance is just enough to put in the excitation-receiving integrated electromagnetic ultrasonic transverse wave sensor; B3: Put the excitation-reception integrated electromagnetic ultrasonic transverse wave sensor into the center of the body (7), the center of the excitation-reception integrated electromagnetic ultrasonic transverse wave sensor coincides with the center of the mark point, use the excitation-reception integrated electromagnetic ultrasonic transverse wave sensor to excite ultrasonic transverse wave signal, and record the time waveform diagram of the received ultrasonic transverse wave signal, calculate the time difference of the time corresponding to the two adjacent groups of signal wave peaks ; B4: Move away the excitation-receiving integrated electromagnetic ultrasonic transverse wave sensor, measure the structural size of the excitation-receiving integrated electromagnetic ultrasonic longitudinal wave sensor, move the four screw rods one (9) outward by the same distance with the help of the displacement scale (8) on the body (7), and stop moving the screw rod one (9) when the moving distance is just enough to put in the excitation-receiving integrated electromagnetic ultrasonic longitudinal wave sensor; B5: Coupling agent is applied at the marker point position, the excitation-reception integrated electromagnetic ultrasonic longitudinal wave sensor is placed in the center of the body (7), the center of the excitation-reception integrated electromagnetic ultrasonic longitudinal wave sensor coincides with the center of the marker point, the excitation-reception integrated electromagnetic ultrasonic longitudinal wave sensor is used to excite ultrasonic longitudinal wave signals and record the time waveform of the received ultrasonic longitudinal wave signals, and the time difference of the time corresponding to the wave peaks of the adjacent two groups of signals is calculated ; B6: Calculate the thickness of the special equipment steel material ; The speed of ultrasonic wave in steel conforms to the following formula: In the formula: is the velocity of the ultrasonic surface wave, is the velocity of the ultrasonic shear wave, is the velocity of the ultrasonic longitudinal wave; The thickness of the steel material is Then: The velocity of the ultrasonic surface wave , the time difference , and the time difference are known quantities, and the thickness of the steel material is obtained by solving the above equations simultaneously , the ultrasonic transverse wave velocity , and the ultrasonic longitudinal wave velocity ; B7: Calculation of the elastic modulus of special equipment steel ; The speed formula of ultrasonic transverse wave is: wherein: is one of the elastic constants of the steel material, is the density of the steel material; The speed formula of ultrasonic longitudinal wave is: In the formula: is one of the elastic constants of steel Elastic constant and has the following relationship: In the formula: is the Poisson's ratio of the steel material; Solving the above equations simultaneously gives the Poisson's ratio ; modulus of elasticity with poisson's ratio and elastic constants satisfy the following relation: The data of elastic constant and Poisson's ratio are substituted into the formula to calculate the elastic modulus of the steel material for special equipment .

2. The method of claim 1, wherein the method is characterized by: In the detection device, the short handle locking screw rod (4), the long handle locking screw rod (5) and the marker pen (6) can move along the axis thereof, the short handle locking screw rod (4) is used for realizing the displacement of the electromagnetic ultrasonic surface wave excitation sensor (1) in the through hole (a) along the left and right directions, the long handle locking screw rod (5) is used for realizing the displacement of the electromagnetic ultrasonic surface wave receiving sensor (2) in the through hole (b) along the left and right directions; the short handle locking screw rod (4) and the long handle locking screw rod (5) are located on the same axis, and the marker pen (6) is perpendicular to the short handle locking screw rod (4) and the long handle locking screw rod (5).

3. The method of claim 1, wherein the method is characterized by: In the detection device, the two screw rods (9) located on the front and rear sides are located on the same axis; the two screw rods (9) located on the left and right sides are located on the same axis.

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