CN104391043A - Device for ultrasonically detecting creep ratio of vermicular graphite cast iron with any size and using method of device - Google Patents

Abstract

The invention relates to a device for ultrasonically detecting the creep ratio of vermicular graphite cast iron with any size and a using method of the device, in particular to a device for detecting the creep ratio of the vermicular graphite cast iron and a using method thereof. The device solves the problem that the size of a vermicular graphite cast iron piece in an ultrasonic propagation direction needs to be detected when the creep ratio of the vermicular graphite cast iron is calculated by using an ultrasonic method at present. The device consists of an ultrasonic signal collector, a computer, a high frequency signal generator and a temperature controller; the computer is connected with the signal generator, an ultrasonic probe is connected with the ultrasonic signal collector, and the ultrasonic signal collector is connected with the computer. The using method of the device comprises the following steps: obtaining the ultrasonic propagation time t0 when a piece to be tested is not put in the device, obtaining the ultrasonic propagation time t1 and t2 of a primary acoustic wave propagation signal and a secondary acoustic wave propagation signal after the piece to be tested is put in the device, and calculating the creep ratio of the piece to be tested. The device can quickly detect the creep ratio of the vermicular graphite cast iron piece, and the size dimensions of the vermicular graphite cast iron piece do not need to be measured.

Description

A kind of device of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate and using method thereof

Technical field

The present invention relates to a kind of device and the using method thereof that detect vermicular cast iron nodulizing rate.

Background technology

Nodulizing rate is not only the important indicator judging graphite compactedization quality and evaluation vermicular cast iron quality and production technology level, is also the foundation of vermicular cast iron quality control and examination.In order to the flake graphite that prevents undertreatment from occurring with produce excessive globular graphite because processing surplus in actual production process, need can be quick, accurate and easy detection nodulizing rate.Metallographic observation method is nodulizing rate detection method the most frequently used at present, though the method can detect nodulizing rate accurately, detection speed is slow, and wastes time and energy.

Supercritical ultrasonics technology is the detection method that a kind of principle according to there is certain relation between hyperacoustic velocity of sound and vermicular cast iron nodulizing rate calculates nodulizing rate, existing based in the pick-up unit of the method, ultrasonic probe directly must contact with pieces of vermicular cast iron, and accurately to measure the size of pieces of vermicular cast iron on ultrasonic propagation direction, just can calculate the velocity of propagation of ultrasound wave in pieces of vermicular cast iron, and the size of pieces of vermicular cast iron in scene is often change, this just brings very large difficulty to the detection of nodulizing rate.

Summary of the invention

The detection method that the object of the invention is to calculate to solve current supercritical ultrasonics technology the nodulizing rate of vermicular cast iron accurately must measure the technical matters of the size of pieces of vermicular cast iron on ultrasonic propagation direction, and provides a kind of device and using method thereof of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate.

The device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate of the present invention is made up of constant temperature immersion liquid groove 1, ultrasound wave receiving transducer 2, pieces of vermicular cast iron to be measured 3, ultrasound wave transmitting probe 4, ultrasonic signal collector 5, computing machine 6, high frequency signal generator 7, ultrasonic wave-coupled liquid 8, temperature sensor 9, temperature controller 10, ultrasonic wave-coupled liquid heating element 11 and porous plate 12;

Two faces that described constant temperature immersion liquid groove 1 inwall is relative arrange a ultrasound wave receiving transducer 2 and a ultrasound wave transmitting probe 4 respectively, ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 axial line overlap and the axial line of ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 above porous plate 12, the horizontal range of ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 is L ₀bottom in constant temperature immersion liquid groove 1 is provided with ultrasonic wave-coupled liquid heating element 11 and temperature sensor 9, ultrasonic wave-coupled liquid heating element 11 is connected with temperature controller 10 respectively with temperature sensor 9, a porous plate 12 is provided with above ultrasonic wave-coupled liquid heating element 11 and temperature sensor 9 in constant temperature immersion liquid groove 1, porous plate 12 is the sheet material having multiple through hole, ultrasonic wave-coupled liquid 8 is filled in constant temperature immersion liquid groove 1, pieces of vermicular cast iron 3 to be measured to be placed on porous plate 12 and to be immersed in ultrasonic wave-coupled liquid 8 completely, the signal output control terminal of computing machine 6 and the signal input part of high frequency signal generator 7 are electrically connected, the high frequency sine waveform voltage signal output part of high frequency signal generator 7 and the high frequency sine waveform voltage signal input part of ultrasound wave transmitting probe 4 are electrically connected, the voltage signal output end of ultrasound wave transmitting probe 4 and a ultrasound wave voltage signal inputs of ultrasonic signal collector 5 are electrically connected, the voltage signal output end of ultrasound wave receiving transducer 2 and another ultrasound wave voltage signal inputs of ultrasonic signal collector 5 are electrically connected, the two-way voltage signal output end of ultrasonic signal collector 5 and the two-way voltage signal inputs of computing machine 6 are electrically connected.

The using method of the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate of the present invention is carried out according to the following steps:

One, open temperature controller 10, by ultrasonic wave-coupled liquid heating element 11 and temperature sensor 9, the temperature of ultrasonic wave-coupled liquid 8 is controlled be 25 DEG C ± 0.5 DEG C;

Two, control high frequency signal generator 7 by computing machine 6 and send high_frequency sine wave, as the driving voltage signal of ultrasound wave transmitting probe 4;

Three, send to computing machine 6 as initial reference signal with the driving voltage signal on the ultrasound wave transmitting probe 4 described in ultrasonic signal collector 5 acquisition step two, ultrasound wave transmitting probe 4 produces the ultrasound wave compressional wave of 3MHz simultaneously, ultrasound wave compressional wave, through after ultrasonic wave-coupled liquid 8, is received by ultrasound wave receiving transducer 2;

Four, ultrasound wave receives pressure probe 2 and the ultrasound wave compressional wave received is converted to voltage signal, and this voltage signal is gathered by ultrasonic signal collector 5 and sends to computing machine 6 as signal after propagation;

Five, after the propagation that obtains of the initial reference signal that obtains according to step 3 of computing machine 6 and step 4, signal calculates ultrasound wave compressional wave when not putting into pieces of vermicular cast iron 3 to be measured at the travel-time t of ultrasonic wave-coupled liquid 8 ₀;

Six, on the porous plate 12 pieces of vermicular cast iron 3 to be measured being placed on constant temperature immersion liquid groove 1 and between ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4, and be all immersed in ultrasonic wave-coupled liquid 8;

Seven, repeat step 2 to step 4, ultrasound wave compressional wave is through an acoustic signals of ultrasonic wave-coupled liquid 8 and pieces of vermicular cast iron to be measured 3 and all received by ultrasound wave receiving transducer 2 through ultrasonic wave-coupled liquid 8 with by the secondary acoustic signals of pieces of vermicular cast iron 3 to be measured toward interflection twice;

Eight, signal, respectively the travel-time t of ultrasound wave compressional wave after putting into pieces of vermicular cast iron 3 in calculation procedure seven after the initial reference signal that after the initial reference signal that obtains according to step 7 of computing machine 6 and an Acoustic Wave Propagation, signal and step 7 obtain and secondary Acoustic Wave Propagation ₁and t ₂;

Nine, computing machine 6 is according to the horizontal range L between ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 ₀, travel-time t ₀, t ₁, t ₂, by formula calculate the velocity of propagation v of ultrasound wave compressional wave in pieces of vermicular cast iron 3 to be measured;

Ten, according to the velocity of propagation v that step 9 obtains, the nodulizing rate VR of pieces of vermicular cast iron 3 to be measured is tried to achieve by following formula:

$\left\{\begin{array}{cc}\mathrm{VR}=-\frac{v}{1.53}+\frac{5800}{1.53}& v\∈\left(\mathrm{5700,5800}\right]\\ \mathrm{VR}=0.6\·\exp \left(\frac{26800}{v}\right)& v\∈\left[\mathrm{5200,5700}\right]\end{array}\right..$

Advantage of the present invention:

The present invention adopts fixed range to be L ₀ultrasound wave transmitting probe and ultrasound wave receiving transducer, the method measuring " when not putting into pieces of vermicular cast iron to be measured ultrasonic propagation time and an acoustic transit time, secondary acoustic transit time after putting into pieces of vermicular cast iron to be measured " measures the nodulizing rate of vermicular cast iron in real time, the present invention can detect the nodulizing rate of pieces of vermicular cast iron to be measured fast, and without the need to measuring the size of tested pieces of vermicular cast iron, convenient and swift during detection, and arbitrary dimension vermicular cast iron nodulizing rate can be detected.

Accompanying drawing explanation

Fig. 1 is the device schematic diagram of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate of the present invention, wherein 1 be constant temperature immersion liquid groove, 2 are ultrasound wave receiving transducers, 3 are pieces of vermicular cast iron to be measured, 4 are ultrasound wave transmitting probes, 5 are ultrasonic signal collectors, 6 are computing machines, 7 are high frequency signal generator, 8 be ultrasonic wave-coupled liquid, 9 are temperature sensors, 10 are temperature controllers, 11 is ultrasonic wave-coupled liquid heating elements, 12 is porous plates, L ₀it is the horizontal range of ultrasound wave receiving transducer and ultrasound wave transmitting probe;

Fig. 2 be the device of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate of the present invention be placed on constant temperature immersion liquid groove 1 at pieces of vermicular cast iron 3 to be measured porous plate 12 on and between ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4, and principle of work schematic diagram when being all immersed in ultrasonic wave-coupled liquid 8, wherein 1 is constant temperature immersion liquid groove, 2 is ultrasound wave receiving transducers, 3 is pieces of vermicular cast iron to be measured, 4 is ultrasound wave transmitting probes, 12 is porous plates, 13 is acoustic signals, 14, 15 and 16 is ultrasound wave compressional waves through ultrasonic wave-coupled liquid with by the secondary acoustic signals of pieces of vermicular cast iron to be measured toward interflection twice.

Embodiment

Embodiment one: composition graphs 1 and Fig. 2, present embodiment is a kind of device of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate, is specifically made up of constant temperature immersion liquid groove 1, ultrasound wave receiving transducer 2, pieces of vermicular cast iron to be measured 3, ultrasound wave transmitting probe 4, ultrasonic signal collector 5, computing machine 6, high frequency signal generator 7, ultrasonic wave-coupled liquid 8, temperature sensor 9, temperature controller 10, ultrasonic wave-coupled liquid heating element 11 and porous plate 12;

Two faces that described constant temperature immersion liquid groove 1 inwall is relative arrange a ultrasound wave receiving transducer 2 and a ultrasound wave transmitting probe 4 respectively, ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 axial line overlap and the axial line of ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 above porous plate 12, the horizontal range of ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 is L ₀bottom in constant temperature immersion liquid groove 1 is provided with ultrasonic wave-coupled liquid heating element 11 and temperature sensor 9, ultrasonic wave-coupled liquid heating element 11 is connected with temperature controller 10 respectively with temperature sensor 9, a porous plate 12 is provided with above ultrasonic wave-coupled liquid heating element 11 and temperature sensor 9 in constant temperature immersion liquid groove 1, porous plate 12 is the sheet material having multiple through hole, ultrasonic wave-coupled liquid 8 is filled in constant temperature immersion liquid groove 1, pieces of vermicular cast iron 3 to be measured to be placed on porous plate 12 and to be immersed in ultrasonic wave-coupled liquid 8 completely, the signal output control terminal of computing machine 6 and the signal input part of high frequency signal generator 7 are electrically connected, the high frequency sine waveform voltage signal output part of high frequency signal generator 7 and the high frequency sine waveform voltage signal input part of ultrasound wave transmitting probe 4 are electrically connected, the voltage signal output end of ultrasound wave transmitting probe 4 and a ultrasound wave voltage signal inputs of ultrasonic signal collector 5 are electrically connected, the voltage signal output end of ultrasound wave receiving transducer 2 and another ultrasound wave voltage signal inputs of ultrasonic signal collector 5 are electrically connected, the two-way voltage signal output end of ultrasonic signal collector 5 and the two-way voltage signal inputs of computing machine 6 are electrically connected.

The using method of the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate of present embodiment is carried out according to the following steps:

One, open temperature controller 10, by ultrasonic wave-coupled liquid heating element 11 and temperature sensor 9, the temperature of ultrasonic wave-coupled liquid 8 is controlled be 25 DEG C ± 0.5 DEG C;

Two, control high frequency signal generator 7 by computing machine 6 and send high_frequency sine wave, as the driving voltage signal of ultrasound wave transmitting probe 4;

Three, send to computing machine 6 as initial reference signal with the driving voltage signal on the ultrasound wave transmitting probe 4 described in ultrasonic signal collector 5 acquisition step two, ultrasound wave transmitting probe 4 produces the ultrasound wave compressional wave of 3MHz simultaneously, ultrasound wave compressional wave, through after ultrasonic wave-coupled liquid 8, is received by ultrasound wave receiving transducer 2;

Four, ultrasound wave receives pressure probe 2 and the ultrasound wave compressional wave received is converted to voltage signal, and this voltage signal is gathered by ultrasonic signal collector 5 and sends to computing machine 6 as signal after propagation;

Five, after the propagation that obtains of the initial reference signal that obtains according to step 3 of computing machine 6 and step 4, signal calculates ultrasound wave compressional wave when not putting into pieces of vermicular cast iron 3 to be measured at the travel-time t of ultrasonic wave-coupled liquid 8 ₀;

Six, on the porous plate 12 pieces of vermicular cast iron 3 to be measured being placed on constant temperature immersion liquid groove 1 and between ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4, and be all immersed in ultrasonic wave-coupled liquid 8;

Seven, repeat step 2 to step 4, ultrasound wave compressional wave is through an acoustic signals of ultrasonic wave-coupled liquid 8 and pieces of vermicular cast iron to be measured 3 and all received by ultrasound wave receiving transducer 2 through ultrasonic wave-coupled liquid 8 with by the secondary acoustic signals of pieces of vermicular cast iron 3 to be measured toward interflection twice;

Eight, signal, respectively the travel-time t of ultrasound wave compressional wave after putting into pieces of vermicular cast iron 3 in calculation procedure seven after the initial reference signal that after the initial reference signal that obtains according to step 7 of computing machine 6 and an Acoustic Wave Propagation, signal and step 7 obtain and secondary Acoustic Wave Propagation ₁and t ₂;

Nine, computing machine 6 is according to the horizontal range L between ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 ₀, travel-time t ₀, t ₁, t ₂, by formula calculate the velocity of propagation v of ultrasound wave compressional wave in pieces of vermicular cast iron 3 to be measured;

Ten, according to the velocity of propagation v that step 9 obtains, the nodulizing rate VR of pieces of vermicular cast iron 3 to be measured is tried to achieve by following formula:

$\left\{\begin{array}{cc}\mathrm{VR}=-\frac{v}{1.53}+\frac{5800}{1.53}& v\∈\left(\mathrm{5700,5800}\right]\\ \mathrm{VR}=0.6\·\exp \left(\frac{26800}{v}\right)& v\∈\left[\mathrm{5200,5700}\right]\end{array}\right..$

The advantage of present embodiment:

Present embodiment adopts fixed range to be L ₀ultrasound wave transmitting probe and ultrasound wave receiving transducer, the method measuring " when not putting into pieces of vermicular cast iron to be measured ultrasonic propagation time and an acoustic transit time, secondary acoustic transit time after putting into pieces of vermicular cast iron to be measured " measures the nodulizing rate of vermicular cast iron in real time, present embodiment can detect the nodulizing rate of pieces of vermicular cast iron to be measured fast, and without the need to measuring the size of tested pieces of vermicular cast iron, convenient and swift during detection, and arbitrary dimension vermicular cast iron nodulizing rate can be detected.

Embodiment two: present embodiment and embodiment one unlike: described ultrasonic wave-coupled liquid 8 is deionized water.Other is identical with embodiment one.

Embodiment three: present embodiment and embodiment one or two unlike: described ultrasound wave receiving transducer 2 is 5P20Z normal probes.Other is identical with embodiment one or two.

Embodiment four: one of present embodiment and embodiment one to three unlike: described ultrasound wave transmitting probe 4 is 5P20Z normal probes.Other is identical with one of embodiment one to three.

Embodiment five: one of present embodiment and embodiment one to four unlike: the model of described ultrasonic signal collector 5 is DPO5104.Other is identical with one of embodiment one to four.

Embodiment six: one of present embodiment and embodiment one to five unlike: the model of described high frequency signal generator 7 is Fluke294.Other is identical with one of embodiment one to five.

Adopt following verification experimental verification effect of the present invention:

Test one: this test is a kind of device of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate, composition graphs 1 and Fig. 2, be specifically made up of constant temperature immersion liquid groove 1, ultrasound wave receiving transducer 2, pieces of vermicular cast iron to be measured 3, ultrasound wave transmitting probe 4, ultrasonic signal collector 5, computing machine 6, high frequency signal generator 7, ultrasonic wave-coupled liquid 8, temperature sensor 9, temperature controller 10, ultrasonic wave-coupled liquid heating element 11 and porous plate 12;

Two faces that described constant temperature immersion liquid groove 1 inwall is relative arrange a ultrasound wave receiving transducer 2 and a ultrasound wave transmitting probe 4 respectively, ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 axial line to overlap and the horizontal range of axial line ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 above porous plate 12 of ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 is L ₀, bottom in constant temperature immersion liquid groove 1 is provided with ultrasonic wave-coupled liquid heating element 11 and temperature sensor 9, ultrasonic wave-coupled liquid heating element 11 is connected with temperature controller 10 respectively with temperature sensor 9, a porous plate 12 is provided with above ultrasonic wave-coupled liquid heating element 11 and temperature sensor 9 in constant temperature immersion liquid groove 1, porous plate 12 is the sheet material having multiple through hole, ultrasonic wave-coupled liquid 8 is filled in constant temperature immersion liquid groove 1, pieces of vermicular cast iron 3 to be measured to be placed on porous plate 12 and to be immersed in ultrasonic wave-coupled liquid 8 completely, the signal output control terminal of computing machine 6 and the signal input part of high frequency signal generator 7 are electrically connected, the high frequency sine waveform voltage signal output part of high frequency signal generator 7 and the high frequency sine waveform voltage signal input part of ultrasound wave transmitting probe 4 are electrically connected, the voltage signal output end of ultrasound wave transmitting probe 4 and a ultrasound wave voltage signal inputs of ultrasonic signal collector 5 are electrically connected, the voltage signal output end of ultrasound wave receiving transducer 2 and another ultrasound wave voltage signal inputs of ultrasonic signal collector 5 are electrically connected, the two-way voltage signal output end of ultrasonic signal collector 5 and the two-way voltage signal inputs of computing machine 6 are electrically connected,

Described ultrasonic wave-coupled liquid 8 is deionized water; Described ultrasound wave receiving transducer 2 is 5P20Z normal probes; Described ultrasound wave transmitting probe 4 is 5P20Z normal probes; The model of described ultrasonic signal collector 5 is DPO5104; The model of described high frequency signal generator 7 is Fluke294.

The using method of the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate of this test is carried out according to the following steps:

One, open temperature controller 10, by ultrasonic wave-coupled liquid heating element 11 and temperature sensor 9, the temperature of ultrasonic wave-coupled liquid 8 is controlled be 25 DEG C ± 0.5 DEG C;

Two, control high frequency signal generator 7 by computing machine 6 and send high_frequency sine wave, as the driving voltage signal of ultrasound wave transmitting probe 4;

Three, send to computing machine 6 as initial reference signal with the driving voltage signal on the ultrasound wave transmitting probe 4 described in ultrasonic signal collector 5 acquisition step two, ultrasound wave transmitting probe 4 produces the ultrasound wave compressional wave of 3MHz simultaneously, ultrasound wave compressional wave, through after ultrasonic wave-coupled liquid 8, is received by ultrasound wave receiving transducer 2;

Four, ultrasound wave receives pressure probe 2 and the ultrasound wave compressional wave received is converted to voltage signal, and this voltage signal is gathered by ultrasonic signal collector 5 and sends to computing machine 6 as signal after propagation;

Five, after the propagation that obtains of the initial reference signal that obtains according to step 3 of computing machine 6 and step 4, signal calculates ultrasound wave compressional wave when not putting into pieces of vermicular cast iron 3 to be measured at the travel-time t of ultrasonic wave-coupled liquid 8 ₀;

Six, on the porous plate 12 pieces of vermicular cast iron 3 to be measured being placed on constant temperature immersion liquid groove 1 and between ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4, and be all immersed in ultrasonic wave-coupled liquid 8;

Seven, repeat step 2 to step 4, ultrasound wave compressional wave is through an acoustic signals of ultrasonic wave-coupled liquid 8 and pieces of vermicular cast iron to be measured 3 and all received by ultrasound wave receiving transducer 2 through ultrasonic wave-coupled liquid 8 with by the secondary acoustic signals of pieces of vermicular cast iron 3 to be measured toward interflection twice;

Eight, signal, respectively the travel-time t of ultrasound wave compressional wave after putting into pieces of vermicular cast iron 3 in calculation procedure seven after the initial reference signal that after the initial reference signal that obtains according to step 7 of computing machine 6 and an Acoustic Wave Propagation, signal and step 7 obtain and secondary Acoustic Wave Propagation ₁and t ₂;

Nine, computing machine 6 is according to the horizontal range L between ultrasound wave receiving transducer 2 and ultrasound wave transmitting probe 4 ₀, travel-time t ₀, t ₁, t ₂, by formula calculate the velocity of propagation v of ultrasound wave compressional wave in pieces of vermicular cast iron 3 to be measured;

Ten, according to the velocity of propagation v that step 9 obtains, the nodulizing rate VR of pieces of vermicular cast iron 3 to be measured is tried to achieve by following formula:

$\left\{\begin{array}{cc}\mathrm{VR}=-\frac{v}{1.53}+\frac{5800}{1.53}& v\∈\left(\mathrm{5700,5800}\right]\\ \mathrm{VR}=0.6\·\exp \left(\frac{26800}{v}\right)& v\∈\left[\mathrm{5200,5700}\right]\end{array}\right..$

Test two: the full content of the using method of the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate in revision test one.

Test three: the full content of the using method of the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate in revision test one.

Test four: the full content of the using method of the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate in revision test one.

Table 1

Table 1 is the test parameters of test one to four and the result data form of test, table 1 can find out that the nodulizing rate of the pieces of vermicular cast iron of the device to test of the ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate of this test of use is almost consistent with the nodulizing rate that metallographic method is tested, measurement result is accurate, and the device of this test adopts fixed range to be L ₀ultrasound wave transmitting probe and ultrasound wave receiving transducer, the method measuring " when not putting into pieces of vermicular cast iron to be measured ultrasonic propagation time and an acoustic transit time, secondary acoustic transit time after putting into pieces of vermicular cast iron to be measured " measures the nodulizing rate of vermicular cast iron in real time, present embodiment can detect the nodulizing rate of pieces of vermicular cast iron to be measured fast, and without the need to measuring the size of tested pieces of vermicular cast iron, convenient and swift during detection, and arbitrary dimension vermicular cast iron nodulizing rate can be detected.

Claims (7)

1. a device for ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate, is characterized in that the device of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate is made up of constant temperature immersion liquid groove (1), ultrasound wave receiving transducer (2), ultrasound wave transmitting probe (4), ultrasonic signal collector (5), computing machine (6), high frequency signal generator (7), ultrasonic wave-coupled liquid (8), temperature sensor (9), temperature controller (10), ultrasonic wave-coupled liquid heating element (11) and porous plate (12);

Two faces that described constant temperature immersion liquid groove (1) inwall is relative are arranged respectively a ultrasound wave receiving transducer (2) and a ultrasound wave transmitting probe (4), the axial line of ultrasound wave receiving transducer (2) and ultrasound wave transmitting probe (4) overlap and the axial line of ultrasound wave receiving transducer (2) and ultrasound wave transmitting probe (4) in the top of porous plate (12), the horizontal range of ultrasound wave receiving transducer (2) and ultrasound wave transmitting probe (4) is L ₀bottom in constant temperature immersion liquid groove (1) is provided with ultrasonic wave-coupled liquid heating element (11) and temperature sensor (9), ultrasonic wave-coupled liquid heating element (11) is connected with temperature controller (10) respectively with temperature sensor (9), in constant temperature immersion liquid groove (1), the top of ultrasonic wave-coupled liquid heating element (11) and temperature sensor (9) is provided with a porous plate (12), porous plate (12) is the sheet material having multiple through hole, ultrasonic wave-coupled liquid (8) is filled in constant temperature immersion liquid groove (1), the signal output control terminal of computing machine (6) and the signal input part of high frequency signal generator (7) are electrically connected, the high frequency sine waveform voltage signal output part of high frequency signal generator (7) and the high frequency sine waveform voltage signal input part of ultrasound wave transmitting probe (4) are electrically connected, the voltage signal output end of ultrasound wave transmitting probe (4) and a ultrasound wave voltage signal inputs of ultrasonic signal collector (5) are electrically connected, the voltage signal output end of ultrasound wave receiving transducer (2) and another ultrasound wave voltage signal inputs of ultrasonic signal collector (5) are electrically connected, the two-way voltage signal output end of ultrasonic signal collector (5) and the two-way voltage signal inputs of computing machine (6) are electrically connected.

2. the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate according to claim 1, is characterized in that described ultrasonic wave-coupled liquid 8 is deionized water.

3. the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate according to claim 1, is characterized in that described ultrasound wave receiving transducer 2 is 5P20Z normal probes.

4. the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate according to claim 1, is characterized in that described ultrasound wave transmitting probe 4 is 5P20Z normal probes.

5. the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate according to claim 1, is characterized in that the model of described ultrasonic signal collector 5 is DPO5104.

6. the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate according to claim 1, is characterized in that the model of described high frequency signal generator 7 is Fluke294.

7. the using method of the device of a kind of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate as claimed in claim 1, is characterized in that the using method of the device of ultrasound examination arbitrary dimension vermicular cast iron nodulizing rate is carried out according to the following steps:

One, open temperature controller (10), by ultrasonic wave-coupled liquid heating element (11) and temperature sensor (9), the temperature of ultrasonic wave-coupled liquid (8) is controlled be 25 DEG C ± 0.5 DEG C;

Two, control high frequency signal generator (7) by computing machine (6) and send high_frequency sine wave, as the driving voltage signal of ultrasound wave transmitting probe (4);

Three, send to computing machine (6) as initial reference signal with the driving voltage signal on the ultrasound wave transmitting probe (4) described in ultrasonic signal collector (5) acquisition step two, ultrasound wave transmitting probe (4) produces the ultrasound wave compressional wave of 3MHz simultaneously, ultrasound wave compressional wave, through after ultrasonic wave-coupled liquid (8), is received by ultrasound wave receiving transducer (2);

Four, ultrasound wave receives pressure probe (2) and the ultrasound wave compressional wave received is converted to voltage signal, and this voltage signal is gathered by ultrasonic signal collector (5) and sends to computing machine (6) as signal after propagation;

Five, after the propagation that obtains of the initial reference signal that obtains according to step 3 of computing machine (6) and step 4, signal calculates ultrasound wave compressional wave when not putting into pieces of vermicular cast iron to be measured (3) at the travel-time t of ultrasonic wave-coupled liquid (8) ₀;

Six, the porous plate (12) pieces of vermicular cast iron to be measured (3) being placed on constant temperature immersion liquid groove (1) is upper and between ultrasound wave receiving transducer (2) and ultrasound wave transmitting probe (4), and is all immersed in ultrasonic wave-coupled liquid (8);

Seven, repeat step 2 to step 4, ultrasound wave compressional wave is through an acoustic signals of ultrasonic wave-coupled liquid (8) and pieces of vermicular cast iron to be measured (3) and all received by ultrasound wave receiving transducer (2) through ultrasonic wave-coupled liquid (8) with by the secondary acoustic signals of the past interflection of pieces of vermicular cast iron to be measured (3) twice;

Eight, signal, respectively the travel-time t of ultrasound wave compressional wave after putting into pieces of vermicular cast iron (3) in calculation procedure seven after the initial reference signal that after the initial reference signal that obtains according to step 7 of computing machine (6) and an Acoustic Wave Propagation, signal and step 7 obtain and secondary Acoustic Wave Propagation ₁and t ₂;

Nine, computing machine (6) is according to the horizontal range L between ultrasound wave receiving transducer (2) and ultrasound wave transmitting probe (4) ₀, travel-time t ₀, t ₁, t ₂, by formula calculate the velocity of propagation v of ultrasound wave compressional wave in pieces of vermicular cast iron to be measured (3);

Ten, according to the velocity of propagation v that step 9 obtains, the nodulizing rate VR of pieces of vermicular cast iron to be measured (3) is tried to achieve by following formula:

$\left\{\begin{array}{cc}\mathrm{VR}=-\frac{v}{1.53}+\frac{5800}{1.53}& v\∈(\mathrm{5700,5800}]\\ \mathrm{VR}=0.6\·\exp \left(\frac{26800}{v}\right)& v\∈\left[\mathrm{5200,5700}\right]\end{array}\right..$