CN218099023U - Coil-only electromagnetic ultrasonic probe and detection device for high-temperature casting and forging - Google Patents
Coil-only electromagnetic ultrasonic probe and detection device for high-temperature casting and forging Download PDFInfo
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- CN218099023U CN218099023U CN202222414492.1U CN202222414492U CN218099023U CN 218099023 U CN218099023 U CN 218099023U CN 202222414492 U CN202222414492 U CN 202222414492U CN 218099023 U CN218099023 U CN 218099023U
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Abstract
The utility model discloses a high temperature casting and forging is coil type electromagnetic ultrasonic probe and device only, wherein the probe includes: a probe housing; the corundum piece is arranged at the bottom of the probe shell; the coil is arranged in the probe shell and is positioned above the corundum piece; the interface is arranged on the probe shell and is electrically connected with the coil; and a cavity formed by the probe shell and the corundum piece is filled with high-temperature-resistant ceramic glue. Only permanent magnet and electro-magnet are abandoned to coil formula electromagnetism ultrasonic probe, only constitute by single coil, and the probe volume is littleer more does benefit to narrow region's detection, and the transduction efficiency is high and difficult for adsorbing ferromagnetic particle and lead to probe transduction efficiency to descend functional damage even, easily with ferromagnetic metal material realization separation or removal, can be in the continuous work of ultra-high temperature environment.
Description
Technical Field
The utility model relates to an ultrasonic testing technical field especially relates to a high temperature casting and forging is coil type electromagnetic ultrasonic probe and device only.
Background
The smooth development of projects such as manned spaceflight, lunar exploration projects, domestic large airplanes, aircraft carriers, high-speed railways and the like puts higher requirements on the manufacture of metal components with high strength, high performance and high reliability.
The method is characterized in that continuous online detection is carried out on the cast-forged piece in a high-temperature state, defects such as internal looseness, shrinkage cavities, cracks, metal inclusions and non-metal inclusions are found in time, quality grade evaluation is carried out on the cast-forged piece with the defects of different damage degrees, re-melting and forging can be carried out on the repairable defects, defective products with unqualified quality are removed in time, real-time detection and control on the defects are achieved, and the method plays a vital role in improving the yield and the manufacturing economic level of large cast-forged pieces.
The nondestructive detection can be carried out only by adopting a coupling agent (such as water, oil and the like) between the traditional piezoelectric probe and a sample, and the detection can not be carried out by the instant volatilization of the common coupling agent when the common coupling agent is contacted with a high-temperature sample. At present, a couplant capable of resisting the high temperature of 550 ℃ is produced in the market, but the short-time detection can be realized only in the high-temperature state. Therefore, the traditional piezoelectric probe is not suitable for continuous high-temperature online detection. The air coupling ultrasonic probe takes air as a coupling agent, can realize non-contact ultrasonic detection, but is not suitable for high-temperature detection because the acoustic impedance difference between the air and metal is large, so that the energy conversion efficiency is low. Laser ultrasound is used as a non-contact ultrasonic detection means and can be applied to high-temperature detection, the ultrasonic wave is mainly based on a thermoelastic effect and an ablation effect, the transduction efficiency of the thermoelastic effect is low, and the ablation effect can cause slight damage to a metal sample. The laser ultrasonic has high requirements on the working environment, dust can cause damage to a light path, and the instrument has large volume, poor portability and high cost of a detection system.
Due to the harsh high-temperature detection environment, the traditional nondestructive detection method cannot continuously detect the metal sample in a high-temperature state. Most high-temperature and ultra-high-temperature manufacturing production lines are required to run continuously, and the traditional nondestructive testing method needs to be stopped for cooling, so that huge economic loss and energy waste can be caused, such as continuous casting and forging production line operation of a steel plant, a high-temperature and high-pressure main steam pipeline of a power station boiler and the like. Therefore, the continuous online detection of the metal forging and the metal component in the high-temperature state is very important.
At present, the relevant patents related to high temperature electromagnetic ultrasonic detection and the device thereof are as follows:
invention patent application No.: CN110530978U discloses a high temperature casting and forging piece continuous detection electromagnetic ultrasonic probe, a flaw detection device and a flaw detection method, and the continuous detection of a 650 ℃ high temperature casting and forging piece is realized by designing a coil, circulating water cooling, a magnetic seat and the like, and the signal-to-noise ratio of an ultrasonic echo is high.
Invention patent application No.: CN201811623474.6 discloses a focus adjustable electromagnetic ultrasonic phased array transducer, which uses a cylindrical permanent magnet to provide a bias magnetic field, a plurality of concentric independent coils with different diameters are placed on the bottom surface of the cylindrical permanent magnet, excitation currents in an inner ring coil and an outer ring coil have adjustable relative delay time, and the purpose of the focus of an electric modulator probe is realized by changing the relative delay of the currents between the coils.
Invention patent application No.: CN201910447618.5 discloses an electromagnetic ultrasonic phased array detection system, which comprises a field programmable gate array FPGA, a high-voltage pulse excitation module, an ADC analog-to-digital converter, an eight-array element ultrasonic sensor and a signal acquisition display module. A bias magnetic field is provided by a permanent magnet, and delayed excitation in a coil controls the deflection direction of an acoustic beam of the excited ultrasonic wave.
The electromagnetic ultrasonic probe in the prior patent mainly utilizes Lorentz force and magnetostriction effect transduction mechanisms, can directly excite and receive ultrasonic waves on metal and nonmetal test blocks, has the characteristics of non-contact, no need of a coupling agent and the like, and is suitable for nondestructive testing in a high-temperature environment. However, the conventional permanent magnet EMAT has the problems that ferromagnetic particles are easily adsorbed, so that the transduction efficiency is reduced, the separation or movement (namely, the magnetic field breaking is difficult) with a ferromagnetic metal material is difficult to realize under the action of magnetic force, and the EMAT has large volume and limited continuous high-temperature resistance due to the fact that the residual magnetic induction intensity is reduced or a pulse electromagnet is adopted in the high-temperature detection process.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high temperature casting and forging piece is coil type electromagnetic ultrasonic probe and device only to solve the current not good problem of ultra-temperature continuous detection technique effect.
In a first aspect, a coil-only electromagnetic ultrasonic probe for high-temperature castings and forgings is provided, comprising:
a probe housing;
the corundum piece is arranged at the bottom of the probe shell;
the coil is arranged in the probe shell and is positioned above the corundum piece;
the interface is arranged on the probe shell and is electrically connected with the coil;
and a cavity formed by the probe shell and the corundum piece is filled with high-temperature-resistant ceramic glue.
Further, still include: and the coil-only electromagnetic ultrasonic detection circuit is electrically connected with the interface and is used for introducing discharge current comprising strong transient current and similar direct current into the coil and detecting echo signals received by the coil.
Furthermore, the coil-only electromagnetic ultrasonic detection circuit comprises a trigger module, a high-voltage capacitor discharge module, a low-voltage capacitor discharge module, an impedance matching module and an echo detection module, wherein the trigger module, the high-voltage capacitor discharge module, the low-voltage capacitor discharge module and the coil are sequentially and electrically connected, and the impedance matching module and the echo detection module are electrically connected with the coil.
Further, the coil-only electromagnetic ultrasonic detection circuit further comprises a sampling current module, and the sampling current module is electrically connected with the impedance matching module.
Further, the coil is one of a racetrack coil, a spiral coil and a butterfly coil.
Furthermore, each turn of the lead of the coil comprises 5-20 leads, high-temperature-resistant ceramic glue is sprayed on the outside of each turn of the lead, and the leads of each turn of the runway coil are fixed at intervals through the high-temperature-resistant ceramic glue.
Furthermore, the lead is one of a silver wire, a gold wire, a platinum wire and a tungsten wire, and the wire diameter is 0.1-0.5 mm.
Furthermore, copper pulley with shafts is arranged at the bottoms of the two sides of the probe shell.
Furthermore, the thickness of the corundum sheet is 0.125-1 mm.
When the high-temperature casting and forging piece is used for detection only by the coil type electromagnetic ultrasonic probe, only the coil type electromagnetic ultrasonic detection circuit simultaneously leads 4-8 mu s of strong transient current and 1-1.5 ms of direct current to the coil, the direct current is led to the coil to generate a bias magnetic field, and the strong transient current is led to the coil to generate ultrasonic waves on the surface of the metal to be detected; the coil receives the ultrasonic echo signal and transmits the ultrasonic echo signal to the coil-only electromagnetic ultrasonic detection circuit, and then detection result analysis is carried out after pre-amplification and analog-to-digital conversion.
In a second aspect, a coil-only electromagnetic ultrasonic detection device for high-temperature casting and forging pieces is provided, which comprises an FPGA control module, a preamplifier, a signal acquisition card, a PC and the coil-only electromagnetic ultrasonic probe for high-temperature casting and forging pieces, wherein the FPGA control module is electrically connected with the coil-only electromagnetic ultrasonic detection circuit, and the coil-only electromagnetic ultrasonic detection circuit is electrically connected with the preamplifier, the signal acquisition card and the PC in sequence.
Advantageous effects
The utility model provides a high temperature casting and forging piece is coil type electromagnetism ultrasonic transducer and device only, adopt this configuration form of coil type electromagnetism ultrasonic transducer only, single coil realizes ultrasonic excitation and receipt promptly, no water cooling plant and permanent magnet, the volume is littleer more nimble, be fit for the detection occasion of narrower and small region, the transduction is efficient and be difficult for adsorbing ferromagnetic particles and lead to probe transduction efficiency to descend functional damage even, easily with ferromagnetic metal material realize separating or remove (disconnected magnetism is easy promptly). The discharge current is passed through the coil of the coil-only EMAT to excite the ultrasound and generate the bias magnetic field required for receiving the ultrasound without the need for a permanent magnet to provide the bias magnetic field required for exciting and receiving the ultrasound. The problems that the permanent magnet is permanently demagnetized at a Curie point at high temperature and a reverse magnetic field is formed in a metal material to prevent the permanent magnet from moving quickly and being difficult to be used for online quick detection of large-scale casting and forging pieces and the like are solved. The coil is wound by adopting the lead which takes the ceramic material as the isolating layer, has strong high-temperature continuous tolerance capability and can continuously work in the environment of ultrahigh temperature (above 900 ℃). The bias magnetic field for receiving the ultrasonic wave by the coil-type electromagnetic ultrasonic probe is provided by the quasi-direct current which is introduced into the coil, the current amplitude of the quasi-direct current in the coil is increased, the strength of the bias magnetic field can be enhanced, the receiving efficiency of the coil-type electromagnetic ultrasonic probe is improved, and the ultrasonic echo signal with higher signal-to-noise ratio is obtained. The method can be used for carrying out online rapid nondestructive testing on the large-scale high-temperature casting and forging piece, and carrying out measurement on the thickness and quantitative/positioning detection on the existing defects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a coil-only electromagnetic ultrasonic probe according to an embodiment of the present invention, in which, (1) is a cross section of the coil-only electromagnetic ultrasonic probe, and (2) is a top view of the coil-only electromagnetic ultrasonic probe;
fig. 2 is a schematic structural diagram of a coil-only electromagnetic ultrasonic detection circuit provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a coil winding system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a transduction mechanism of a coil-only electromagnetic ultrasonic probe according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a discharge current splitting of a coil-only electromagnetic ultrasonic probe according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a coil-only electromagnetic ultrasonic testing apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to limit the invention to the precise embodiments disclosed. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "center", "longitudinal", "lateral", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. When an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In order to solve the problem that high temperature casting and forging piece lasts on-line measuring, the utility model provides a high temperature casting and forging piece is only coil type Electromagnetic ultrasonic (EMAT for short)) probe and device adopts single coil and gets rid of the scheme of permanent magnet or electro-magnet, and the leading-in coil of discharge current that only coil type Electromagnetic ultrasonic detection circuit produced, wherein the high frequency component and the class direct current component combined action of discharge current can form the ultrasonic wave, and class direct current component then produces the bias magnetic field who receives echo signal. In order to adapt to a high-temperature detection environment, only a coil type electromagnetic ultrasonic probe selects a high-temperature resistant coil and a high-temperature resistant probe shell, and the coil is energized/received with ultrasonic waves after being charged with discharge current. The solution of the present invention is specifically illustrated by the following examples.
Example 1
As shown in fig. 1, the present embodiment provides a coil-only electromagnetic ultrasonic probe for high-temperature forging, which includes a probe housing 23, a coil 21, a corundum plate 22, an interface 24, and a copper pulley 26 with a shaft; corundum piece 22 set up in probe shell 23 bottom, coil 21 set up in the probe shell 23 and be located corundum piece 22 top, copper take axle pulley 26 set up in probe shell 23 both sides bottom, interface 24 set up in on the probe shell 23, just interface 24 with coil 21 passes through the wire and connects, the cavity intussuseption that probe shell 23 and corundum piece 22 formed is filled with high temperature resistant ceramic and is glued. The high temperature resistant ceramic glue 25 is filled, namely the welding spots of the protective coil 21 and the interface 24 are stable and reliable, and the coil 21 can be fixed in the probe at a constant position.
In this embodiment, the device further includes a coil-only electromagnetic ultrasonic detection circuit, and the coil-only electromagnetic ultrasonic detection circuit is connected to the interface 24; the coil-only electromagnetic ultrasonic detection circuit is used for introducing a discharge current comprising a strong transient current and a direct current-like current to the coil 21 and detecting an echo signal received by the coil 21.
As shown in fig. 2, the coil-only electromagnetic ultrasonic detection circuit includes a trigger module 31, a high-voltage capacitor discharge module 32, a low-voltage capacitor discharge module 33, an impedance matching module 34, and an echo detection module 36, where the trigger module 31, the high-voltage capacitor discharge module 32, the low-voltage capacitor discharge module 33, and the coil 21 are sequentially connected by a wire, and the impedance matching module 34 and the echo detection module 36 are both connected to the coil 21 by a wire. The trigger module 31 mainly includes a MOS transistor driver chip P 1 And the on-off time of the MOS tube can be determined by the pulse width of the FPGA so as to achieve the purpose of controlling the excitation/reception of the coil-only EMAT ultrasonic wave. The high-voltage capacitor discharge module 32 introduces a strong transient current to the coil by the high-voltage charging capacitor C1 for exciting the ultrasonic wave, which plays a dominant role in the ultrasonic excitation stage of the coil-only electromagnetic ultrasonic probe. The low-voltage capacitor discharging module 33 inputs a dc-like current, which is more gentle than the discharging current of the high-voltage capacitor discharging module, to the coil through the high-voltage charging capacitor C2, and generates a relatively static bias magnetic field. The impedance matching module 34 ensures that only the equivalent impedance of the coil-type electromagnetic ultrasonic probe meets the requirement of the resonant frequency as much as possible by adjusting the parameters of the inductor L2 and the capacitor C4. The echo detection module 36 is coupled to the echo signal through the capacitor C5 and isolates the direct current, and then the clear ultrasonic signal, such as the reflected wave signal of the bottom surface and the defect, can be obtained after filtering again through the amplitude limiting circuit formed by combining the diodes D2 and D3 and the resistor R7 and the capacitor C6.
In this embodiment, the coil-only electromagnetic ultrasonic detection circuit further includes a sampling current module 35, and the sampling current module 35 is connected to the impedance matching module 34 through a wire. The sampling current module observes the discharge current through the sampling resistor to judge the working state of the coil-type electromagnetic ultrasonic detection circuit and the amplitude of the discharge current.
In this embodiment, the coil 21 is a racetrack coil. In order to realize the continuous detection of ultra-high temperature forging and casting, the utility model discloses well runway coil is through following method coiling, specifically as follows:
a metal with a high melting point is selected as a conducting wire, such as a silver wire, a gold wire, a platinum wire, a tungsten wire and the like, and in the embodiment, the silver wire is preferably used as the conducting wire; high-temperature-resistant ceramic glue with the temperature of 1280 ℃ is selected as an insulating layer material. And silver wires with different wire diameters and lengths are selected according to actual requirements to wind the coil, and the wire diameter of the silver wire is 0.1-0.5 mm.
As shown in fig. 3, in order to realize coil winding, the present embodiment further provides a coil winding system, which includes an active motor 2, an automatic coating device 9, and a heating/cooling box 14, which are sequentially arranged; the automatic coating device 9 is internally provided with two conveying motors 3 and 4, a polarization motor 5, a chute 6, an automatic spray head 7 for the special liquid adhesive and an automatic spray head 8 for the first high-temperature resistant ceramic adhesive; a second high-temperature-resistant ceramic glue automatic spray head 10, a coil winding machine 11, a heating module 12 and a refrigerating module 13 are arranged in the heating/cooling box 14.
During winding, 5-20 leads are selected as one turn, and each turn of silver wire is straightened by the main function of the driving motor and conveniently enters the automatic coating device 9. Two conveying motors 3 and 4 are respectively arranged at the head end and the tail end of the automatic coating device 9 and can fix and convey the silver wire coil 1. Special liquid adhesive which takes polyimide as a main component is sprayed on the silver wire turns through a special liquid adhesive automatic nozzle 7 to form a layer of film which can help the insulation material to be evenly attached and quickly dried; then, the first high-temperature-resistant ceramic glue automatic nozzle 8 loaded with high-temperature-resistant ceramic glue is used for spraying the high-temperature-resistant ceramic glue on the turn of the lead for multiple times, and the times of the coating process can be determined according to the distance between turns of the required coil. The silver wire with the wire diameter of 0.25-0.3 mm generally needs to be coated with high-temperature ceramic glue twice. The automatic spray head and the sliding groove 6 are arranged at the top of the automatic coating device 9, so that the flexibility of the automatic spray head can be increased, and the utilization rate of the spraying material can be improved. In the same way, the polarizing motor 5 at the bottom of the device can drive the whole automatic coating device 9 to vibrate during working, and the silver wire surface layer which keeps vibrating can be contacted with the atomized coating more greatly. The prepared high-temperature ceramic silver wire is conveyed to a coil winding machine 11, a second high-temperature ceramic glue automatic spray head 10 is arranged above the coil winding machine 11, when the coil winding machine 11 starts to wind the coil, the second high-temperature ceramic glue automatic spray head 10 is opened simultaneously to provide adhesive between each turn of the coil, and a refrigerating device is opened during the period, and the temperature is preferably kept between 5 and 15 ℃. And after the winding is finished, heating the wound coil by using a heating module, keeping the temperature at 50 ℃ for 2 hours and at 150 ℃ for 2 hours, and then cooling the coil to the normal temperature along with air so as to solidify the ceramic layer of the high-temperature coil. After the solidification is finished, the refrigeration module can be opened to accelerate the natural cooling process, and the manufacturing time of the high-temperature coil is shortened. The high-temperature ceramic glue is used as an insulating material in a high-temperature environment, so that the coil cannot be detected, and the wire is broken down and burnt because the insulating layer is not high-temperature resistant and is liquefied or vaporized.
In practice, the probe shell 23 is brass and the interface 24 is a two-core LEMO interface. In the probe, the corundum sheet 22 has good insulating property and does not participate in electromagnetic effect, so that the detection result is not influenced, the corundum sheet 22 can reduce heat conduction generated by a high-temperature sample, and the coil 21 and the metal to be detected have an insulating effect. Meanwhile, the corundum sheet 22 has the characteristic of friction resistance similar to ceramic and plays a role of protecting the coil together with the brass probe shell, and the thickness of the corundum sheet 22 is preferably 0.125-1 mm. Copper tape spool pulley 26 can play the adjustment to the probe and lift off the effect, can protect probe bottom corundum piece not damaged when detecting high temperature casting and forging, and convenient the removal.
Fig. 4 is a schematic diagram showing a transduction mechanism of a coil-only electromagnetic ultrasonic probe, in which a coil is placed above a sample to be measured, and a certain lift-off is maintained between the coil and the sample. Strong transient current excitation ultrasonic waves and quasi-direct current are simultaneously led into the coil 21 to generate a bias magnetic field, and induced eddy currents are excited on the surface layer of the metal to be detected. According to the Lorentz force mechanism, the induced eddy current on the surface layer of the metal to be detected generates ultrasonic waves under the action of the bias magnetic field. When the ultrasonic wave is transmitted in the metal to be detected to reach the bottom surface or meet defects, the ultrasonic wave returns to the surface layer of the sample where the coil is located, the generated source current drives particles on the surface of the sample to vibrate under the action of the bias magnetic field, and induced voltage is generated in the coil.
Fig. 5 is a schematic diagram showing a splitting of a discharge current of only the coil-type electromagnetic ultrasonic probe and a splitting schematic diagram of a discharge current of only the coil-type electromagnetic ultrasonic detection circuit, which is introduced into the coil, wherein (1) is the discharge current and is composed of (2) a high-voltage capacitance discharge current and (3) a low-voltage capacitance discharge current. (2) The high-voltage capacitor discharge current can be divided into (4) high-voltage capacitor discharge current-high-frequency current and (5) high-voltage capacitor discharge current-like direct current. (4) The high-voltage capacitor discharge current-high-frequency current self-excitation forms dynamic bias magnetic induction intensity. (3) And (5) adding the low-voltage capacitor discharge current and the high-voltage capacitor discharge current-like direct current to form (6) total-like direct current which can generate static bias magnetic induction intensity.
When the high-temperature forging piece is detected by using the coil-type electromagnetic ultrasonic probe only for the high-temperature forging piece, the coil-type electromagnetic ultrasonic detection circuit only simultaneously leads 4-8 mu s of strong transient current and 1-1.5 ms of direct current to the coil, the direct current is led to the coil to generate a bias magnetic field, and the strong transient current is led to the coil to generate ultrasonic waves on the surface of the metal to be detected; the coil receives the ultrasonic echo signal and transmits the ultrasonic echo signal to the coil-only electromagnetic ultrasonic detection circuit, and then detection result analysis is carried out after pre-amplification and analog-to-digital conversion.
Example 2
As shown in fig. 6, the present embodiment provides a coil-only electromagnetic ultrasonic detection apparatus for a high-temperature forging, including an FPGA control module 41, a preamplifier 44, a signal acquisition card 45, a PC 46, and the above coil-only electromagnetic ultrasonic probe 43 for a high-temperature forging, where the FPGA control module 41 is connected to the coil-only electromagnetic ultrasonic detection circuit 42 through a wire, and the coil-only electromagnetic ultrasonic detection circuit 42 is connected to the preamplifier 44, the signal acquisition card 45, and the PC 46 sequentially through wires. The FPGA control module 41 controls the trigger signal to determine the conduction of the high-voltage transient current and the low-voltage dc-like current, and when the high transient current passes through the coil, a transient induced eddy current is excited on the metal surface layer, and an ultrasonic wave is formed under the action of a bias magnetic field generated by the dc-like current. After amplitude limiting and filtering are carried out on signals intercepted by the coil type ultrasonic detection circuit 42, the signals are amplified by the preamplifier 44, echo signals are transmitted to the PC 46 by the signal acquisition card 45, frequency calculation is carried out on the acquired echo signals by the LabVIEW software development platform, and then a reasonable band-pass filtering range is selected, so that clear ultrasonic bottom wave signals and clear defect wave signals can be obtained.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A high temperature casting and forging piece coil-only electromagnetic ultrasonic probe is characterized by comprising:
a probe housing;
the corundum piece is arranged at the bottom of the probe shell;
the coil is arranged in the probe shell and is positioned above the corundum piece;
the interface is arranged on the probe shell and is electrically connected with the coil;
and a cavity formed by the probe shell and the corundum piece is filled with high-temperature-resistant ceramic glue.
2. The coil-only electromagnetic ultrasonic probe of high temperature forging as set forth in claim 1, further comprising:
and the coil-only electromagnetic ultrasonic detection circuit is electrically connected with the interface and is used for introducing discharge current comprising strong transient current and similar direct current into the coil and detecting echo signals received by the coil.
3. The coil-only electromagnetic ultrasonic probe for the high-temperature forging and casting of claim 2, wherein the coil-only electromagnetic ultrasonic detection circuit comprises a trigger module, a high-voltage capacitance discharge module, a low-voltage capacitance discharge module, an impedance matching module and an echo detection module, the trigger module, the high-voltage capacitance discharge module, the low-voltage capacitance discharge module and the coil are electrically connected in sequence, and the impedance matching module and the echo detection module are electrically connected with the coil.
4. The coil-only electromagnetic ultrasonic probe of high-temperature forging casting of claim 3, wherein the coil-only electromagnetic ultrasonic detection circuit further comprises a sampling current module electrically connected with the impedance matching module.
5. The coil-only electromagnetic ultrasonic probe of the high-temperature forging cast of claim 1, wherein the coil is one of a racetrack coil, a spiral coil and a butterfly coil.
6. The coil-only electromagnetic ultrasonic probe of the high-temperature forging and casting piece of claim 5, wherein each turn of the wire of the coil comprises 5-20 wires, high-temperature-resistant ceramic glue is sprayed outside each turn of the wire, and the turns of the wire of the runway coil are fixed at intervals by the high-temperature-resistant ceramic glue.
7. The coil-only type electromagnetic ultrasonic probe of the high-temperature forging casting and forging piece as claimed in claim 6, wherein the conducting wire is one of a silver wire, a gold wire, a platinum wire and a tungsten wire, and the wire diameter is 0.1-0.5 mm.
8. The coil-only electromagnetic ultrasonic probe for the high-temperature casting and forging piece according to claim 1, wherein copper pulleys with shafts are further arranged at the bottoms of the two sides of the probe shell.
9. The coil-only electromagnetic ultrasonic probe of the high-temperature forging and casting piece of claim 1, wherein the thickness of the corundum piece is 0.125-1 mm.
10. The coil-only electromagnetic ultrasonic detection device for the high-temperature casting and forging piece is characterized by comprising an FPGA control module, a preamplifier, a signal acquisition card, a PC (personal computer) and the coil-only electromagnetic ultrasonic probe for the high-temperature casting and forging piece, wherein the FPGA control module is electrically connected with the coil-only electromagnetic ultrasonic detection circuit, and the coil-only electromagnetic ultrasonic detection circuit is electrically connected with the preamplifier, the signal acquisition card and the PC in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222414492.1U CN218099023U (en) | 2022-09-13 | 2022-09-13 | Coil-only electromagnetic ultrasonic probe and detection device for high-temperature casting and forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222414492.1U CN218099023U (en) | 2022-09-13 | 2022-09-13 | Coil-only electromagnetic ultrasonic probe and detection device for high-temperature casting and forging |
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| Publication Number | Publication Date |
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| CN218099023U true CN218099023U (en) | 2022-12-20 |
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| CN202222414492.1U Active CN218099023U (en) | 2022-09-13 | 2022-09-13 | Coil-only electromagnetic ultrasonic probe and detection device for high-temperature casting and forging |
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