A double-laminated ultrahigh-temperature eddy current sensor

Abstract

The application discloses a double-layer ultrahigh-temperature eddy current sensor, which comprises a preamplifier and a probe shell, an external connector is fixedly installed on one side of the preamplifier, a connecting socket is fixedly installed on the side of the preamplifier far from the external connector, and a first eddy current assembly is installed in the probe shell; when the iron core two and the iron core one are parallel, the coil directions of the two alternating magnetic fields are the same, so that the two alternating magnetic fields become more dense through vector superposition, the detection sensing precision is improved, the subtle changes of parameters such as the position, material or temperature of the target object can be captured, when the iron core two and the iron core one are perpendicular, the coil directions of the two alternating magnetic fields are perpendicular, so that the two alternating magnetic fields become more extensive through vector superposition, the detection sensing range is significantly improved, and the existence and changes of the target object can be accurately detected in a wider range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of eddy current sensors, in particular to a double-layer ultra-high-temperature eddy current sensor. BACKGROUND

[0002] In many industrial fields, such as aerospace, energy and power, metallurgy and chemical industry, it is crucial to monitor the displacement, vibration, temperature and other parameters of equipment components in ultra-high-temperature environments in real time and accurately. Accurate acquisition of these parameters is not only related to the stable operation of the equipment, but also directly affects production safety and efficiency. As a non-contact measurement sensor, the eddy current sensor has been widely used in industrial monitoring due to its high sensitivity, fast response and strong anti-interference ability.

[0003] The existing eddy current sensor only uses a single alternating magnetic field, and the detection range is limited. The magnetic field distribution generated by the single alternating magnetic field is relatively fixed, and the effective detection area is relatively narrow. In an ultra-high-temperature environment, the thermal expansion and thermal deformation of the measured object are complex, which may cause the distance between the measured object and the sensor to exceed the effective detection range of the single alternating magnetic field, so that the sensor cannot accurately measure the related parameters. SUMMARY

[0004] The purpose of the present application is to provide a double-layer ultra-high-temperature eddy current sensor to solve the problems raised in the background.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a double-layer ultra-high-temperature eddy current sensor, comprising a preamplifier and a probe housing, one side of the preamplifier is fixedly installed with an external connector, the side of the preamplifier away from the external connector is fixedly installed with a connection socket, the inside of the probe housing is installed with a first eddy current assembly, and the inside of the first eddy current assembly is movably installed with a second eddy current assembly, the inside of the probe housing is installed with an adjusting assembly, one side of the probe housing is fixedly connected with a connecting line, the side of the connecting line away from the probe housing is fixedly connected with a connecting plug, and the connecting plug is inserted into the inside of the connection socket.

[0006] Preferably, the first eddy current assembly comprises a support ring, an iron core one is fixedly installed on the top of the support ring, a coil one is installed on the outside of the iron core one, and the bottom of the support ring is fixedly connected with the bottom of the inner cavity of the probe housing.

[0007] Preferably, the second eddy current assembly comprises a rotating sleeve, an iron core two is fixedly installed in the inside of the rotating sleeve, a coil two is installed on the outside of the iron core two, and the rotating sleeve is located on the inside of the iron core one.

[0008] Preferably, two outer sleeves are symmetrically and rotatably installed outside the rotating sleeve, and the two outer sleeves are fixedly connected to the inside of the first core at the end away from the rotating sleeve; two inner sleeves are symmetrically and fixedly installed outside the rotating sleeve, and the two inner sleeves are rotatably installed in the inside of the first core at the end away from the rotating sleeve, and the two inner sleeves are located inside the two outer sleeves.

[0009] Preferably, torsional springs are installed inside the two outer sleeves, the torsional springs are sleeved and installed outside the inner sleeves, one end of the torsional spring is fixedly connected to the outside of the inner sleeve, and the other end of the torsional spring is fixedly connected to the inside of the outer sleeve.

[0010] Preferably, the adjusting assembly comprises a rotating dial, a connecting seat is fixedly installed on the top of the rotating dial, a winding and unwinding roller is fixedly installed on the top of the connecting seat, an anti-off plate is fixedly installed on the top of the winding and unwinding roller, a connecting pull rope is fixedly connected to the outside of the winding and unwinding roller, and one end of the connecting pull rope away from the winding and unwinding roller is fixedly connected to the bottom of the rotating sleeve.

[0011] Preferably, the rotating dial is rotatably installed in the inside of the bottom of the probe shell, a guide block is fixedly installed on the bottom of the inner cavity of the probe shell, the guide block is sleeved outside the connecting pull rope, and a dial groove is formed in the outside of the front device.

[0012] Preferably, a supporting plate is fixedly installed on the bottom of the connecting socket, and a heat dissipation groove is formed in the outside of the connecting socket.

[0013] Compared with the prior art, the application has the beneficial effects that when the second core and the first core are parallel, the directions of the two alternating magnetic field coils are the same, so that the two alternating magnetic fields become more concentrated through the vector superposition magnetic field, thereby improving the detection sensing precision, effectively improving the detection sensing precision, capturing the subtle changes of the target object position, material or temperature and the like, and when the second core and the first core are perpendicular, the directions of the two alternating magnetic field coils are perpendicular, so that the two alternating magnetic fields become more extensive through the vector superposition magnetic field, thereby significantly improving the detection sensing range, and ensuring that the existence and changes of the target object can be accurately detected in a wider range.

[0014] In addition, after the rotating dial rotates, the connecting seat and the winding and unwinding roller can be driven to rotate, so as to wind and release the connecting pull rope, so that the inner sleeve can rotate and reset in the inside of the outer sleeve through the torsional spring, thereby changing the relative position of the rotating sleeve in the inside of the first core, changing the relative position of the second core in the inside of the first core, and changing the superposition effect of the two alternating magnetic fields, so that the adjustment is convenient and simple. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional appearance structure of the application.

[0016] Figure 2 The front end stereo structure diagram of the application.

[0017] Figure 3 The sensor probe stereo structure diagram of the application.

[0018] Figure 4 The probe shell cross-section structure diagram of the application.

[0019] Figure 5 The second eddy current component and the adjusting component stereo structure diagram of the application.

[0020] Figure 6 The front end stereo structure diagram of the application. Figure 5 The enlarged structure diagram of A in the application.

[0021] Figure 7 The eddy current diagram when the core one and the core two are parallel in the application.

[0022] Figure 8 The eddy current diagram when the core one and the core two are vertical in the application.

[0023] In the figure: 1, front end; 2, probe shell; 3, slot; 4, rotating dial; 5, connecting line; 6, heat dissipation slot; 7, support plate; 8, external connector; 9, connecting socket; 10, connecting plug; 11, core one; 12, coil one; 13, rotating sleeve; 14, coil two; 15, core two; 16, support ring; 17, anti-off plate; 18, connecting pull rope; 19, winding and unwinding roller; 20, connecting seat; 21, guide block; 22, outer sleeve; 23, torsional spring; 24, inner sleeve rod. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0025] Please refer to Figures 1-8The application provides a technical scheme: a double-layer ultrahigh-temperature eddy current sensor, which comprises a preamplifier 1 and a probe shell 2, the probe shell 2 adopts a high-temperature-resistant ceramic material as an outer layer structure, plays a role of heat insulation and protection of internal elements, and adopts a high-temperature alloy or a special composite material for internal key components, the preamplifier 1 is fixedly provided with an external connector 8 on one side, the preamplifier 1 is fixedly provided with a connecting socket 9 on the side away from the external connector 8, the probe shell 2 is internally provided with a first eddy current assembly, and the first eddy current assembly is internally movably provided with a second eddy current assembly, the first eddy current assembly comprises a support ring 16, the top of the support ring 16 is fixedly provided with a core one 11, the outer side of the core one 11 is sleevedly provided with a coil one 12, the bottom of the support ring 16 is fixedly connected with the bottom of the inner cavity of the probe shell 2, the second eddy current assembly comprises a rotating sleeve 13, the inside of the rotating sleeve 13 is fixedly provided with a core two 15, the outer side of the core two 15 is sleevedly provided with a coil two 14, the rotating sleeve 13 is located on the inner side of the core one 11, the outer side of the rotating sleeve 13 is symmetrically rotatably provided with two outer sleeves 22, and the ends of the two outer sleeves 22 away from the rotating sleeve 13 are fixedly connected with the inside of the core one 11, the outer side of the rotating sleeve 13 is symmetrically fixedly provided with two inner sleeves 24, and the ends of the two inner sleeves 24 away from the rotating sleeve 13 are rotatably arranged in the inside of the core one 11, the two inner sleeves 24 are located in the inside of the two outer sleeves 22, the inside of the two outer sleeves 22 is provided with a torsion spring 23, the torsion spring 23 is sleevedly arranged on the outer side of the inner sleeve 24, one end of the torsion spring 23 is fixedly connected with the outer side of the inner sleeve 24, and the other end of the torsion spring 23 is fixedly connected with the inner side of the outer sleeve 22, the inside of the probe shell 2 is provided with an adjusting assembly, one side of the probe shell 2 is fixedly connected with a connecting wire 5, the connecting wire 5 is fixedly connected with a connecting plug 10 on the side away from the probe shell 2, and the connecting plug 10 is inserted into the inside of the connecting socket 9.

[0026] The working principle of the above technical scheme is as follows: when in use, the probe shell 2 is connected with the preamplifier 1 through the connecting socket 9 and the connecting plug 10, and after an external power supply is connected, the coil one 12 and the coil two 14 are internally powered, the coil one 12 is powered and cooperates with the core one 11 to form an alternating magnetic field, and the coil two 14 is powered and cooperates with the core two 15 to also form an alternating magnetic field, when the sensor probe is close to the conductive metal target, the alternating magnetic field induces eddy current on the metal surface, the eddy current generates a reverse magnetic field, which weakens the original magnetic field strength, the position, material or temperature change of the target object changes the eddy current strength, and then affects the impedance of the probe coil, and then the target object parameters can be inversely deduced by detecting the impedance change, by detecting the change of the magnetic field strength, the sensor can indirectly obtain the relevant information about the metal target, the position, material or temperature change of the target object will significantly change the eddy current strength, when the position of the target object changes, the distance and relative angle between it and the sensor probe will also change, thereby causing the distribution and strength of the alternating magnetic field on the metal surface to change, and then affecting the generation and distribution of the eddy current, when the target object is close to the probe, the penetration depth of the alternating magnetic field on the metal surface decreases, and the eddy current strength increases, on the contrary, when the target object is away from the probe, the eddy current strength decreases, different materials of metals have different electrical conductivity and magnetic permeability, which also has an important influence on the eddy current strength, the electrical conductivity of good conductors such as copper and aluminum is high, and the eddy current strength generated under the same conditions is large; the magnetic permeability of magnetic materials such as iron is high, which can produce a stronger shielding effect on the alternating magnetic field, thereby affecting the distribution of the eddy current, in addition, temperature changes can also change the electrical conductivity and magnetic permeability of the metal, and then affect the eddy current strength, as the temperature rises, the electrical conductivity of the metal usually decreases, resulting in a decrease in the eddy current strength, and under the operation of the adjusting assembly, the relative position between the core two 15 and the core one 11 can be changed, when the core two 15 and the core one 11 are parallel, the coil direction of the alternating magnetic field formed by the coil one 12 powered in cooperation with the core one 11 and the alternating magnetic field formed by the coil two 14 powered in cooperation with the core two 15 is the same, thereby making the two alternating magnetic fields through the vector superposition magnetic field become more dense, thereby improving the detection sensing precision, which can effectively improve the detection sensing precision, and can capture the subtle changes of the target object position, material or temperature and other parameters, and when the core two 15 and the core one 11 are perpendicular, the coil direction of the alternating magnetic field formed by the coil one 12 powered in cooperation with the core one 11 and the alternating magnetic field formed by the coil two 14 powered in cooperation with the core two 15 is perpendicular, thereby making the two alternating magnetic fields through the vector superposition magnetic field become more extensive, which can significantly improve the detection sensing range, and ensure that the target object can be accurately detected in a wider area.

[0027] In another embodiment, as Figures 1-8As shown, the adjusting assembly comprises a rotating knob 4, the top of the rotating knob 4 is fixedly provided with a connecting seat 20, the top of the connecting seat 20 is fixedly provided with a winding and unwinding roller 19, the top of the winding and unwinding roller 19 is fixedly provided with an anti-off plate 17, the outer side of the winding and unwinding roller 19 is fixedly connected with a connecting pull rope 18, one end of the connecting pull rope 18 away from the winding and unwinding roller 19 is fixedly connected with the bottom of a rotating sleeve 13, the rotating knob 4 is rotatably installed in the inside of the bottom of the probe shell 2, the friction between the rotating knob 4 and the probe shell 2 can prevent the rotating knob 4 from rotating in the inside of the probe shell 2, the rotating knob 4 can be rotated only by using a force greater than the maximum torsional force of the torsional spring 23 by artificial, the bottom of the inner cavity of the probe shell 2 is fixedly provided with a guide block 21, the guide block 21 is sleeved on the outer side of the connecting pull rope 18, and the outside of the preamplifier 1 is provided with a dialing groove 3.

[0028] After the rotating knob 4 is rotated, the connecting seat 20 and the winding and unwinding roller 19 can be driven to rotate, so as to wind and release the connecting pull rope 18, so that the inner sleeve rod 24 can rotate and reset in the outer sleeve 22 in cooperation with the torsional spring 23, so as to change the relative position of the rotating sleeve 13 in the iron core one 11, change the relative position of the iron core two 15 in the iron core one 11, and change the superposition effect of the two alternating magnetic fields, so that the adjusting is convenient and simple.

[0029] In another embodiment, as shown in Figures 1-8 The bottom of the connecting socket 9 is fixedly provided with a supporting plate 7, and the outside of the connecting socket 9 is provided with a heat dissipation groove 6.

[0030] The supporting plate 7 can support the preamplifier 1, and the heat dissipation groove 6 can release the heat generated by the internal equipment of the preamplifier 1.

[0031] Working principle: when in use, first connect the probe shell 2 and the preamplifier 1 together through the connecting socket 9 and the connecting plug 10, after connecting the external power supply, the inside of the coil one 12 and the coil two 14 can be energized, the coil one 12 can form an alternating magnetic field after being energized, and the coil two 14 can also form an alternating magnetic field after being energized, when the sensor probe is close to the conductive metal target, the alternating magnetic field induces eddy current on the metal surface, the eddy current generates a reverse magnetic field, which weakens the original magnetic field strength, the position, material or temperature change of the target object will change the eddy current strength, and then affect the impedance of the probe coil, and then the target object parameters can be deduced by detecting the impedance change, by detecting the change of the magnetic field strength, the sensor can indirectly obtain the relevant information about the metal target, the position, material or temperature change of the target object will significantly change the eddy current strength, when the position of the target object changes, the distance and relative angle between it and the sensor probe will also change, resulting in the change of the distribution and strength of the alternating magnetic field on the metal surface, and then affecting the generation and distribution of the eddy current, when the target object is close to the probe, the penetration depth of the alternating magnetic field on the metal surface decreases, and the eddy current strength increases, on the contrary, when the target object is far away from the probe, the eddy current strength decreases, different materials of metal have different electrical conductivity and magnetic permeability, which also has an important influence on the eddy current strength, the electrical conductivity of good conductors such as copper and aluminum is higher, and the eddy current strength generated under the same conditions is larger, while the magnetic permeability of magnetic materials such as iron is higher, which can produce stronger shielding effect on the alternating magnetic field, thereby affecting the distribution of the eddy current, in addition, temperature change will also change the electrical conductivity and magnetic permeability of metal, and then affect the eddy current strength, with the increase of temperature, the electrical conductivity of metal usually decreases, resulting in the decrease of eddy current strength, in addition, after rotating the rotating knob 4, the connecting seat 20 and the winding and unwinding roller 19 can be rotated, thereby winding and releasing the connecting pull rope 18, thereby cooperating with the torsional spring 23 to make the inner sleeve rod 24 rotate and reset in the outer sleeve 22, thereby changing the relative position of the rotating sleeve 13 in the iron core one 11, and then changing the relative position of the iron core two 15 in the iron core one 11, when the iron core two 15 and the iron core one 11 are parallel, the coil direction of the alternating magnetic field formed by the coil one 12 and the iron core one 11 after being energized and the alternating magnetic field formed by the coil two 14 and the iron core two 15 after being energized is the same, thereby making the two alternating magnetic fields become more dense through vector superposition, thereby improving the detection sensing precision, which can effectively improve the detection sensing precision, and can capture the subtle changes of the target object position, material or temperature parameters, when the iron core two 15 and the iron core one 11 are perpendicular, the coil direction of the alternating magnetic field formed by the coil one 12 and the iron core one 11 after being energized and the alternating magnetic field formed by the coil two 14 and the iron core two 15 after being energized is perpendicular, thereby making the two alternating magnetic fields become more extensive through vector superposition, which can significantly improve the detection sensing range, and ensure that the target object can be accurately detected in a wider area.

[0032] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes, modifications, substitutions and variations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A double stack ultra-high temperature eddy current sensor comprising a preamplifier (1) and a probe housing (2), characterized in that: One side of the prepositioner (1) is fixedly installed with an external connector (8), and the side of the prepositioner (1) away from the external connector (8) is fixedly installed with a connecting socket (9), the inside of the probe shell (2) is installed with a first eddy current assembly, and the inside of the first eddy current assembly is movably installed with a second eddy current assembly, the inside of the probe shell (2) is installed with an adjusting assembly, one side of the probe shell (2) is fixedly connected with a connecting line (5), and the side of the connecting line (5) away from the probe shell (2) is fixedly connected with a connecting plug (10) which is inserted into the inside of the connecting socket (9). The adjusting assembly comprises a rotating dial plate (4), the top of the rotating dial plate (4) is fixedly installed with a connecting seat (20), the top of the connecting seat (20) is fixedly installed with a winding and unwinding roller (19), the top of the winding and unwinding roller (19) is fixedly installed with an anti-off plate (17), the outer side of the winding and unwinding roller (19) is fixedly connected with a connecting pull rope (18), the rotating dial plate (4) is rotatably installed in the inside of the bottom of the probe shell (2), the bottom of the inside of the probe shell (2) is fixedly installed with a guide block (21), and the guide block (21) is sleeved on the outer side of the connecting pull rope (18), the outside of the prepositioner (1) is provided with a dialing groove (3), and the bottom of the connecting socket (9) is fixedly installed with a supporting plate (7), and the outside of the connecting socket (9) is provided with a heat dissipation groove (6).

2. A double stack EHT sensor according to claim 1, characterized in that: The first eddy current assembly comprises a supporting ring (16), the top of the supporting ring (16) is fixedly installed with a first iron core (11), the outer side of the first iron core (11) is sleeved and installed with a first coil (12), and the bottom of the supporting ring (16) is fixedly connected with the bottom of the inside of the probe shell (2).

3. A double stack EHT sensor according to claim 2, wherein: The second eddy current assembly comprises a rotating sleeve (13), the inside of the rotating sleeve (13) is fixedly installed with a second iron core (15), the outer side of the second iron core (15) is sleeved and installed with a second coil (14), and the rotating sleeve (13) is located on the inside of the first iron core (11).

4. A double stack EHT sensor according to claim 3, wherein: The outer side of the rotating sleeve (13) is symmetrically rotatably installed with two outer sleeves (22), one end of each of the two outer sleeves (22) away from the rotating sleeve (13) is fixedly connected with the inside of the first iron core (11), the outer side of the rotating sleeve (13) is symmetrically fixedly installed with two inner sleeve rods (24), one end of each of the two inner sleeve rods (24) away from the rotating sleeve (13) is rotatably installed in the inside of the first iron core (11), and the two inner sleeve rods (24) are respectively located in the inside of the two outer sleeves (22).

5. A double stack EHT sensor according to claim 4, wherein: The inside of each of the two outer sleeves (22) is installed with a torsion spring (23), the torsion spring (23) is sleeved and installed on the outer side of the inner sleeve rod (24), one end of the torsion spring (23) is fixedly connected with the outer side of the inner sleeve rod (24), and the other end of the torsion spring (23) is fixedly connected with the inside of the outer sleeve (22).

6. A double stack EHT sensor according to claim 5, wherein: One end of the connecting pull rope (18) away from the winding and unwinding roller (19) is fixedly connected with the bottom of the rotating sleeve (13).

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