WO2022183544A1 - Visualization detection device and detection method for high-temperature performance of material in external magnetic field - Google Patents

Abstract

A visualization detection device and detection method for high-temperature performance of a material in an external magnetic field. The detection device comprises: a furnace body unit (100) used for providing a detection space for a material to be detected, a visual window module (130) being provided on the furnace body unit (100) and being used for providing a window for an optical detection unit (500) to detect said material; a heating and cooling unit (200) used for heating said material and cooling the furnace body unit (100), a cooling module (220) of the heating and cooling unit (200) being provided outside the furnace body unit (100); a magnetic supply unit (300) used for providing a magnetic field environment for said material; a vacuum unit (400) used for providing a vacuum environment for an inner space of the furnace body unit (100); and an optical detection unit (500) used for detecting changes of said material in real time, the optical detection unit (500) being provided outside the furnace body unit (100) and matching the height of the visual window module (130). Said device can visually observe in real time a change state of said material in a high-temperature service process in an external magnetic field environment, and has a high image acquisition quality.

Description

A kind of visual detection equipment and detection method of material high temperature performance with external magnetic field

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims to enjoy the priority of the Chinese patent application CN 202110241837.5 filed on March 4, 2021, entitled "A Visual Detection Equipment for High-Temperature Properties of Materials with External Magnetic Field", and the title of " The priority of Chinese patent application CN 202110240793.4 is a method for visual detection of high temperature properties of materials with an external magnetic field, the entire contents of which are incorporated herein by reference.

technical field

The invention relates to the technical field of material service performance detection, in particular to a visual detection device and detection method for material high temperature performance with an external magnetic field.

Background technique

The electromagnetic process of materials is an emerging frontier interdisciplinary subject and research direction, which is of great significance to the preparation of metal smelting, non-metallic materials and new materials. Electromagnetic fields exist widely in the field of metallurgy. With the in-depth development of electromagnetic metallurgical theoretical research and basic research work, the application of electromagnetic fields in the field of metallurgy is becoming more and more mature, providing an important way for smelting new steel grades and improving steel quality. Refractory materials play a vital role in the efficient and safe production of thermal equipment such as iron and steel smelting and the quality of products. They are essential basic materials in high-temperature industrial production such as metallurgy, electric power, petrochemical and aerospace industries. The damage of the high temperature furnace has a great impact on the safe and efficient operation of the high temperature furnace and the quality of steel production. In the process of iron and steel smelting, the external electromagnetic field will affect the motion state of molten steel and the properties of slag, which will ultimately affect the properties of steel and the slag corrosion behavior of refractory materials.

Existing strain measurement methods are generally divided into contact strain measurement methods and non-contact strain measurement methods. The contact strain measurement method is to characterize the strain of the material according to the displacement of the probe. On the one hand, the measurement range is limited, and usually only a single point or local strain can be measured; on the other hand, the contact strain measurement can only obtain the average strain information, cannot accurately characterize asymmetric strain. Compared with the traditional contact strain measurement technology, the main principle of the non-contact strain measurement technology is based on digital image correlation technology, and the deformation measurement is realized based on the principle of machine vision. It will not have any influence on the measurement specimen, but the change of the heat density of the gas in the test environment will affect the light refractive index, thus affecting the image acquisition quality and calculation accuracy. And at present, there is no effective means to realize the visual detection of high temperature performance of materials in an external magnetic field environment at 1600 °C.

SUMMARY OF THE INVENTION

The present invention intends to provide a visual detection device and detection method for the high temperature performance of materials with an external magnetic field to solve the deficiencies in the prior art. The technical problem to be solved by the present invention is achieved through the following technical solutions.

A visual inspection equipment for high temperature properties of materials with an external magnetic field, including:

The furnace body unit is used to provide a space to be tested for the tested material; the furnace body unit is provided with a visual window module, and the visual window module is used to provide a window for the optical detection unit to detect the tested material;

a heating and cooling unit for heating the tested material and cooling the furnace body unit; the cooling module of the heating and cooling unit is arranged outside the furnace body unit;

The magnetic supply unit is used to provide a magnetic field environment for the tested material;

The vacuum unit is used to provide a vacuum environment for the inner space of the furnace unit;

The optical detection unit is used for real-time detection of the change of the material to be detected; the optical detection unit is arranged outside the furnace body unit and matches the height of the visible window module.

Preferably, the furnace body unit includes a furnace hearth module, and the furnace hearth module includes a furnace shell, a furnace hearth brick that is attached to the inner wall of the furnace shell and is hollow inside; Holes matched with the heating and cooling units are provided with holes matched with the heating and cooling units, and holes matched with the vacuum unit are provided at corresponding positions on the side surfaces of the furnace shell and the furnace brick.

Preferably, a furnace door module is provided on the furnace shell, and the furnace door module includes a furnace door hinged with the furnace shell and a furnace door heat-resistant rubber ring arranged on the inner surface of the furnace door. One end is provided with a furnace door buckle, and the furnace door buckle is matched with the door bolt screw and the door bolt nut to press the furnace door on the furnace shell.

Preferably, a visible window module is provided on the furnace door, and the visible window module includes a visible window opened on the furnace door, a quartz glass located outside the furnace door and covering the visible window, a visible window located on the furnace door and the visible window. A heat-resistant rubber ring between the quartz glass, the quartz glass and the heat-resistant rubber ring are fixed on the outer surface of the furnace door through a flange.

Preferably, the heating and cooling unit includes a heating and temperature measuring module, and the heating and temperature measuring module includes a heating element installed in the furnace module, a thermocouple installed in the furnace module and covered with a corundum protective cover, and the heating element and the thermoelectric Coupled to the connected heating controller, the heating element protrudes into the furnace module through the holes in the furnace shell and the upper surface of the furnace brick.

Preferably, the cooling module includes a water pump, a cooling water pipeline connected to the water pump and screwed on the periphery of the furnace shell.

Preferably, the magnetic supply unit includes a power supply located outside the furnace body unit, a coil connected to the power supply, and a sample stage located in the furnace module; the furnace brick is provided with an empty slot for the magnetic coil, and the coil is placed in the furnace block. In the empty slot of the magnetic coil, the furnace brick and the side surface of the furnace shell are provided with through-holes, and both ends of the coil are connected to the power source through the through-holes.

Preferably, the sample stage is a silicon carbide ceramic or alumina ceramic or graphite square stage, the coil is a mica-clad pure nickel core high temperature resistant coil, and the power supply is a DC power supply or an AC power supply.

Preferably, the vacuum unit includes a vacuum pump, a suction pipe connecting the vacuum pump and the furnace module, a vacuum valve and a pressure gauge arranged on the suction pipe, and the suction pipe communicates with the inner space of the furnace module.

Preferably, the optical detection unit includes a fixing bracket, two industrial cameras arranged on the fixing bracket, and an active light source arranged on the fixing bracket and located between the two industrial cameras, and the lenses of the industrial cameras are sequentially installed with belts The two industrial cameras are perpendicular to each other through filter lenses and neutral grayscale lenses.

The present invention also provides a method for visualizing high temperature properties of materials with an external magnetic field, which is realized by the following technical solutions.

A method for visualizing high-temperature properties of materials with an applied magnetic field, the improvement of which is that, using the device for visualizing high-temperature properties of materials with an external magnetic field as described in any one of the foregoing, the method includes the following steps:

S1, configure high temperature speckle mixture;

S2, draw a graphic mark of high temperature resistance;

S3, put in the tested material; place the sample of the tested material on the sample stage from the furnace door, adjust the position of the sample (305), make the sample coaxial with the coil, and close the furnace door and tighten the bolt nut;

S4, turn on the cooling water; connect the water pump with the cooling water outlet, and connect the cooling water inlet with the cooling water source, turn on the water pump, and the cooling water flows around the outer surface of the furnace shell from bottom to top through the cooling water pipeline;

S5, evacuate; evacuate the inner space of the furnace module into a vacuum environment through the vacuum unit;

S6, turn on the active light source; turn on the active light source, use the industrial camera to record the initial picture information of the heat-resistant graphic mark, keep the active light source turned on, and suspend the recording of the image information of the high-temperature resistant graphic mark by the industrial camera;

S7, magnetic supply; provide a magnetic field environment for the sample through the magnetic supply unit;

S8, start the test;

S9, data collection;

S10, when the test is over, stop the industrial camera from recording the picture information of the high temperature resistant graphic mark, stop heating, and wait for the furnace module to cool down to below 200°C, open the vacuum valve, and turn off the water pump.

Preferably, in S1, the solute of the high temperature speckle mixed solution is alumina micropowder or silicon dioxide micropowder or silicon carbide micropowder or iron-aluminum spinel micropowder or cobalt oxide micropowder, and the solvent is acetone or absolute ethanol or water , the mass ratio of solute to solvent is (3～10):1.

Preferably, in S2, the high-temperature speckle mixture is sprayed on the surface of the sample to be tested, and the sample is heat-treated at 110-200°C for 1-3 hours, and then fired at 1600°C for 1-2 hours to obtain a high-temperature resistant product. Graphic markers.

Preferably, in S5, turn on the vacuum pump and vacuum valve, observe the pressure inside the furnace module through a pressure gauge, pump the pressure inside the furnace module to 6×10 ^-3 Pa～100Pa, and close the vacuum valve and vacuum pump.

Preferably, in S7, the power is turned on, the coil current input mode is adjusted, the magnetic field intensity inside the furnace module is controlled by the current of the power supply, the magnetic field intensity is adjusted to 0.05-50 mT, and the current input mode of the coil is DC current or AC current, so that The magnetic field inside the furnace module is a static magnetic field or an alternating magnetic field.

Preferably, in S8, the heating temperature measurement module is turned on, the sample of the material to be detected is heated to the experimental temperature, the industrial camera is turned on, and the picture information of the high temperature resistant graphic mark is recorded, and the recording time interval is 0-12000ms.

Preferably, in S9, the initial picture information of the high temperature resistance graphic mark is used as a reference picture, and the strain change analysis is performed on the high temperature resistance graphic mark pictures one by one, and the strain/displacement-time, strain/displacement-temperature of the sample under the external magnetic field environment are obtained. Curve and sample instantaneous strain distribution cloud map.

Compared with the prior art, the present invention has the following beneficial effects:

(1) In the present invention, by making a high temperature resistant graphic mark on the surface of the sample of the material to be detected, through the optical detection unit, the active light source imaging technology is adopted, and the bandpass filter lens with the same central wavelength as the active light source can effectively eliminate the temperature of 1600°C. The effect of thermal radiation on the image signal acquisition contrast of the surface pattern mark image of the tested sample under high temperature service state. The detection area is vacuum treated, and a low-pass light neutral gray mirror is loaded at the lens to prolong the exposure time, and the heat flow disturbance is averaged through physical means, which helps to reduce the light refraction caused by the air density change in the optical path system. The disturbance of fluctuations in image signal acquisition. The monochromatic light source illumination and band-pass filter imaging technology based on the active light source can visually observe the changing state of the tested material during high-temperature service in real time.

(2) The present invention provides a vacuum environment for the sample by setting a vacuum unit, thereby reducing the influence of the heat density change of the gas on the optical refractive index, thereby improving the image acquisition quality and calculation accuracy.

(3) The present invention can provide a static magnetic field and an alternating magnetic field by setting a magnetic supply system, so as to obtain the surface strain information during the service process of the material in different magnetic field environments, so as to know the service performance parameters of the material in the high temperature electromagnetic environment; the magnetic supply coil The built-in and high-temperature furnace minimizes the magnetic loss of the electromagnetic coil, and can ensure that the magnetic field lines generated by the electromagnetic coil are uniform and controllable; the electromagnetic coil is made of mica-clad pure nickel core high-temperature coils, which can ensure that the equipment can achieve a high temperature of up to 1600 °C Stable and long-term loading in strong electromagnetic fields in the environment.

(4) The equipment of the present invention adopts modular construction, including a furnace body unit, a heating and cooling unit, a magnetic supply unit, a vacuum unit and an optical detection unit, a total of five unit systems, and the consumables are easy to replace and the replacement cost is low. The optical path system including the optical detection unit is simple, low cost and easy to maintain and repair.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the structural representation of the furnace body unit in the present invention;

Fig. 3 is the structural representation of the furnace shell in the present invention;

Fig. 4 is the structural representation of hearth brick in the present invention;

Fig. 5 is the sectional structure schematic diagram of the furnace module in the present invention;

6 is a schematic structural diagram of a furnace door module in the present invention;

Fig. 7 is the exploded schematic diagram of the visible window module in the present invention;

Fig. 8 is the sectional structure schematic diagram of the visible window module in the present invention;

FIG. 9 is a schematic structural diagram of a heating and cooling unit in the present invention;

10 is a schematic structural diagram of a heating temperature measurement module in the present invention;

11 is a schematic structural diagram of a cooling module in the present invention;

Fig. 12 is the installation schematic diagram of the heating and cooling unit in the present invention;

13 is a schematic structural diagram of a magnetic supply unit in the present invention;

Fig. 14 is the installation schematic diagram of the magnetic supply unit in the present invention;

15 is a schematic cross-sectional structure diagram of a magnetic supply unit in the present invention;

Fig. 16 is the structural schematic diagram of the vacuum unit in the present invention;

17 is a schematic structural diagram of an optical detection unit in the present invention;

18 is a schematic diagram of the installation of the optical detection unit in the present invention;

Fig. 19 is the step flow chart of the present invention;

The reference signs in the drawings are: 100, furnace body unit; 110, furnace module, 111, furnace shell, 112, furnace brick, 113, empty slot for magnetic coil; 120, furnace door module, 121, furnace door, 122, heat-resistant rubber ring for furnace door, 123, loose-leaf, 124, door buckle, 125, door bolt screw, 126, door bolt nut; 130, visual window module, 131, visual window, 132, quartz glass, 133, heat-resistant rubber ring, 134, flange; 200, heating and cooling unit; 210, heating temperature measurement module, 211, heating element, 212, thermocouple, 213, heating controller; 220, cooling module, 221, water pump, 222, cooling water pipeline, 223, cooling water inlet, 224, cooling water outlet; 300, magnetic supply unit; 301, coil, 302, wire hole, 303, power supply, 304, sample stage, 305, sample ;400, vacuum unit; 401, vacuum pump, 402, exhaust pipe, 403, vacuum valve, 404, pressure gauge; 500, optical detection unit; 501, industrial camera, 502, active light source, 503, bandpass filter lens, 504 , Neutral grayscale mirror, 505, fixed bracket.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Example 1:

Referring to FIGS. 1 to 18, a visual inspection device for high temperature performance of materials with an external magnetic field is improved, including:

The furnace body unit 100 is used to provide a space to be tested for the material to be tested; the furnace body unit 100 is provided with a visual window module 130, and the visual window module 130 is used to provide the optical detection unit 500 to detect the material to be tested. The window in which the detection is performed;

The heating and cooling unit 200 is used for heating the material to be tested and cooling the furnace body unit 100; the cooling module 220 of the heating and cooling unit 200 is arranged outside the furnace body unit 100;

The magnetic supply unit 300 is used to provide a magnetic field environment for the detected material;

The vacuum unit 400 is used to provide a vacuum environment for the inner space of the furnace body unit 100;

The optical detection unit 500 is used to detect the change of the detected material in real time; the optical detection unit 500 is arranged on the outer side of the furnace body unit 100 and matches the height of the visible window module 130 .

In this embodiment, the furnace unit 100 is the main body of the apparatus of the present invention, and is used to provide an experimental space for testing the material to be tested; the heating and cooling unit 200 is used to heat the sample 305 of the material to be tested and The furnace body unit 100 is cooled; the magnetic supply unit 300 is used to provide a magnetic field environment for the sample 305 of the tested material; the vacuum unit 400 is used to provide a vacuum environment for the sample 305 of the tested material; the optical detection unit 500 is used to detect changes in the sample 305 of the tested material in real time.

The detection device of this embodiment is a non-contact strain detection device, thereby overcoming the limitation of the contact type strain detection/measurement device in the prior art. In this embodiment, the vacuum unit 400 is provided to provide a vacuum environment for the sample 305, thereby reducing the influence of the heat density change of the gas on the optical refractive index, thereby improving the image acquisition quality and calculation accuracy. In this embodiment, by setting the magnetic supply system 300, the service performance parameters of the material under the high temperature electromagnetic environment can be obtained.

Further, as shown in FIG. 16 , the vacuum unit 400 includes a vacuum pump 401, a suction pipe 402 connecting the vacuum pump 401 and the furnace module 110, a vacuum valve 403 and a pressure gauge 404 arranged on the suction pipe 402. The suction pipe 402 It communicates with the inner space of the furnace module 110 .

In this embodiment, the vacuum unit 400 is used to provide a vacuum environment for the furnace module 110, the vacuum pump 401 is used to provide power for the vacuum unit 400, the vacuum valve 403 is a switch for controlling the vacuum unit 400, the pressure gauge 404 is used to observe the air pressure in the furnace module 110 .

Example 2:

On the basis of Embodiment 1, as shown in FIGS. 2 to 5 , the furnace body unit 100 includes a furnace hearth module 110 , and the furnace hearth module 110 includes a furnace shell 111 . Furnace bricks 112; holes matched with the heating and cooling unit 200 are provided at corresponding positions on the upper surfaces of the furnace shell 111 and the furnace bricks 112, and the sides of the furnace shell 111 and the furnace bricks 112 correspond to All positions are provided with holes for matching with the vacuum unit 400 .

Further, the furnace shell 111 is a steel square shell.

Further, the furnace brick 112 is made of corundum refractory material, and the interior is a hollow square space.

In this embodiment, the furnace module 110 and the furnace shell 111 are used to provide support for the components of the entire testing equipment, and the furnace bricks 112 are used to protect the furnace shell 111 .

Further, as shown in FIG. 6 , the furnace shell 111 is provided with a furnace door module 120 , and the furnace door module 120 includes a furnace door 121 hinged with the furnace shell 111 , and a furnace door disposed on the inner surface of the furnace door 121 . Heat-resistant rubber ring 122, the furnace door 121 is provided with a furnace door buckle 124 at the non-hinged end, and the furnace door buckle 124 cooperates with the door bolt screw 125 and the door bolt nut 126 to press the furnace door 121 to the furnace shell 111 on.

Further, the furnace door 121 is a steel square door.

Further, one end of the furnace door 121 is hinged with the furnace shell 111 through the loose leaf 123 , and the other end is welded with a furnace door buckle 124 , and the furnace door 121 can be opened and closed around the loose leaf 123 .

Further, the leaflet 123 is a steel leaflet, one end is connected to the furnace shell 111 and the other end is connected to the furnace door 121 .

Further, the furnace door buckle 124 is a steel semi-circular ring, and one end is welded on the furnace door 121; the door bolt screw 125 is a steel screw, one end is connected to the furnace shell 111, and the other end is connected to the door bolt nut 126. Matching; the door bolt nut 126 is a steel nut.

In this embodiment, the furnace door module 120 and the furnace door 121 are used to take and place the sample 305 of the tested material, the furnace door heat-resistant rubber ring 122 is used to seal the furnace door 121, and the loose leaf 123 is used for the furnace door When the door 121 is opened and closed, the furnace door buckle 124 , the door bolt screw 125 and the door bolt nut 126 cooperate with each other to press the furnace door 121 on the furnace shell 111 .

Further, as shown in FIGS. 7 and 8 , the furnace door 121 is provided with a visual window module 130 , and the visual window module 130 includes a visual window 131 opened on the furnace door 121 and located outside the furnace door 121 And cover the quartz glass 132 of the visible window 131, and the heat-resistant rubber ring 133 arranged between the furnace door 121 and the quartz glass 132, the quartz glass 132 and the heat-resistant rubber ring 133 are fixed on the furnace door 121 through the flange 134. on the outside.

Further, the viewing window 131 is a rectangular through hole opened in the center of the furnace door 121 .

Further, the quartz glass 132 is a piece of quartz rectangular glass slightly larger than the visible window 131 .

Further, the flange 134 is a steel rectangle, the center is a square through hole, and the periphery is provided with threaded holes, which are fixed on the furnace door 121 by bolts, and the quartz glass 132 and the heat-resistant rubber ring 133 are fixed on the furnace door. 121 on.

In this embodiment, the visible window module 130, the visible window 131 and the quartz glass 132 are used to provide a window for the optical detection unit 500 to detect the sample 305 of the material to be detected, and the quartz glass 132 is used to block the furnace chamber Part of the heat radiation in the module 110 , the heat-resistant rubber ring 133 is used to seal the visible window 131 , and the flange 134 is used to fix the quartz glass 132 and the heat-resistant rubber ring 133 on the furnace door 121 .

Example 3:

On the basis of Embodiment 2, as shown in FIGS. 9 , 10 and 12 , the heating and cooling unit 200 includes a heating temperature measurement module 210 , and the heating temperature measurement module 210 includes a heating element 211 installed in the furnace module 110 , A thermocouple 212 installed in the furnace module 110 and covered with a corundum protective sheath, a heating controller 213 connected to the heating element 211 and the thermocouple 212, the heating element 211 passing through the furnace shell 111 and the hole on the upper surface of the furnace brick 112 Protruding into the furnace module 110 .

Further, the heating element 211 is a silicon molybdenum rod or a silicon molybdenum ribbon or a tungsten rod or a tungsten wire, and the upper end of the heating element 211 is connected to a heating controller.

In this embodiment: the heating element 211 is used to increase thermal energy and heat the sample 305 of the material to be tested; the thermocouple 212 is used to measure the temperature in the furnace module 110; the heating controller 213 is used to control the heating element 211, and adjust the heating efficiency of the heating element 211 according to the measurement signal of the thermocouple 212, so as to adjust the heating temperature in the furnace module 110, and then adjust the heated temperature of the sample 305 of the tested material.

Further, as shown in FIGS. 9 , 11 and 12 , the cooling module 220 includes a water pump 221 , and a cooling water pipeline 222 connected to the water pump 221 and screwed on the periphery of the furnace shell 111 .

Further, the cooling water pipeline 222 is a spiral steel round tube, which is spirally wound and welded on the outer surface of the furnace shell 111 .

Further, one end of the cooling water pipeline 222 is a cooling water inlet 223, and the other end is a cooling water outlet 224; the cooling water inlet 223 is connected to the cooling water source, and the cooling water outlet 224 is connected to the water inlet of the water pump 221. end connected.

In this embodiment, the cooling module 220 is used to cool the furnace shell 111 of the furnace chamber module 110, the water pump 221 is used to provide power for the cooling module 220, and the cooling water pipeline 222 is used to provide a flow path for cooling water.

Example 4:

On the basis of Embodiment 2 or 3, as shown in FIGS. 13 , 14 and 15 , the magnetic supply unit 300 includes a power supply 303 located outside the furnace body unit 100 , a coil 301 connected to the power supply 303 , and located in the furnace module 110 . The sample stand 304; the interior of the furnace brick 112 is provided with a magnetic coil slot 113, the coil 301 is placed in the magnetic coil slot 113, the furnace brick 112 and the side surface of the furnace shell 111 Both ends of the coil 301 are provided with through-holes 302 , and both ends of the coil 301 are connected to the power source 303 through the through-holes 302 .

Further, the sample table 304 is a silicon carbide ceramic or alumina ceramic or graphite square table, and the height of the sample table 304 is not lower than the lower side of the visual window 131 of the visual window module 130; further , the sample stage 304 is slightly higher than the lower side of the viewing window 131 .

Further, the number of the magnetic coil empty slots 113 is two, and they are located above and below the sample stage 304 respectively.

Further, the coil 301 is a high temperature resistant coil made of mica-coated pure nickel core, the coil 301 is wound into a multi-turn spiral shape, the coil 301 is wound in the same direction, and is coaxially placed in the space of the magnetic coil. in the groove 113.

Further, the power supply 303 is a DC power supply or an AC power supply, and the positive and negative poles of the power supply 303 are connected to the coil 301 placed in the magnetic coil slot 113 to supply power to the coil 301, so that the coil is placed in the furnace. The middle of the module 110 generates an induced magnetic field with a certain strength and direction.

In this embodiment, the magnetic supply unit 300 is used to provide the sample 305 of the tested material with a certain intensity of electromagnetic field, the sample stage 304 is used to place the sample 305 of the tested material, and the power supply 303 can provide a static magnetic field and alternating magnetic field, so as to obtain the surface strain information of the sample 305 during service in different magnetic field environments, so as to obtain the service performance parameters of the sample 305 in the high-temperature electromagnetic environment.

Example 5:

On the basis of any one of Embodiments 1-4, as shown in FIGS. 17 and 18 , the optical detection unit 500 includes a fixing bracket 505 , two industrial cameras 501 arranged on the fixing bracket 505 , and two industrial cameras 501 arranged on the fixing bracket 505 And the active light source 502 is located between the two industrial cameras 501. The lenses of the industrial cameras 501 are sequentially installed with a band-pass filter lens 503 and a neutral grayscale mirror 504, and the two industrial cameras 501 are perpendicular to each other.

Further, the light emitted by the active light source 502 is visible light with a wavelength of 350-450 nm.

Further, the cut-off range of the light wave of the band-pass filter lens 503 is 10-30 nm, and the central wavelength is the same as the wavelength of the light emitted by the active light source 502 .

Further, the light transmission amount of the neutral grayscale mirror 504 is 0.2-10%.

Further, the fixing bracket 505 is a triangular bracket and is placed in front of the viewing window 131 .

Further, the height of the fixing bracket 505 is not lower than the lower side of the visible window 131 of the visible window module 130 ; further, the fixing bracket 505 is slightly higher than the lower side of the visible window 131 .

In this embodiment, the optical detection unit 500 is used for real-time detection of changes in the sample 305 of the material to be detected, the industrial camera 501 is used for taking pictures of the sample 305 , and the active light source 502 is used for A light source is provided for taking pictures, and the fixing bracket 505 is used for fixing the industrial camera 501 and the active light source 502 .

Example 6:

Referring to FIGS. 1 to 19 , a method for visualizing the high-temperature performance of a material with an applied magnetic field, the improvement lies in that the visualization of the high-temperature performance of a material with an applied magnetic field as described in any one of Embodiments 1 to 5 is used. Testing equipment, including the following steps:

S1, configure high temperature speckle mixture;

S2, draw a graphic mark of high temperature resistance;

S3, put in the tested material; place the sample 305 of the tested material on the sample stage 304 from the furnace door 121, adjust the position of the sample 305 so that the sample 305 is coaxial with the coil 301 , close the furnace door 121 and tighten the bolt nut 126;

S4, turn on the cooling water; connect the water pump 221 with the cooling water outlet 224, and connect the cooling water inlet 223 with the cooling water source, turn on the water pump 221, and the cooling water flows around the outer surface of the furnace shell 111 from bottom to top through the cooling water pipeline 222;

S5, evacuate; evacuate the inner space of the furnace module 110 into a vacuum environment through the vacuum unit 400;

S6, turn on the active light source; turn on the active light source 502, use the industrial camera 501 to record the initial picture information of the heat-resistant graphic mark, keep the active light source 502 turned on, and suspend the recording of the image information of the high-temperature resistant graphic mark by the industrial camera 501;

S7, supply magnetism; provide a magnetic field environment for the sample 305 through the magnetism supply unit 300;

S8, start the test;

S9, data collection;

S10, the test is over, stop the industrial camera 501 from recording the picture information of the high temperature resistant graphic mark, stop heating, and wait for the furnace module 110 to cool below 200°C, open the vacuum valve 403 and turn off the water pump 221 .

In this embodiment: the furnace body unit 100 provides an experimental space for testing the material to be tested; the heating and cooling unit 200 heats the sample 305 of the tested material and cools the furnace body unit 100; The magnetic unit 300 provides a magnetic field environment for the sample 305 of the material to be detected; the vacuum unit 400 provides a vacuum environment for the sample 305 of the material to be detected; Variety.

This embodiment is a non-contact strain detection method, thereby overcoming the limitations of the contact strain detection/measurement method/device in the prior art. In this embodiment, the vacuum unit 400 is provided to provide a vacuum environment for the sample 305, thereby reducing the influence of the heat density change of the gas on the optical refractive index, thereby improving the image acquisition quality and calculation accuracy. In this embodiment, by setting the magnetic supply system 300, the service performance parameters of the material under the high temperature electromagnetic environment can be obtained.

Further, in S1, the solute of the high temperature speckle mixed solution is alumina micropowder or silicon dioxide micropowder or silicon carbide micropowder or iron-aluminum spinel micropowder or cobalt oxide micropowder, and the solvent is acetone or absolute ethanol or water. , the mass ratio of solute to solvent is (3～10):1.

Further, in S2, the high-temperature speckle mixture is sprayed on the surface to be tested of the sample 305, and the sample 305 is heat-treated at 110-200° C. for 1-3 hours, and then fired at 1600° C. for 1-2 hours. High temperature graphic marking.

Furthermore, in S1, iron-aluminum spinel powder and acetone were mixed with a mass ratio of 10:1 to prepare a high-temperature speckle mixture; in S2, sample 305 was heat-treated at 110 °C for 1 h, and then calcined at 1600 °C. After 1 hour of preparation, high temperature resistant graphic marks were obtained;

Alternatively, in S1, the high-temperature speckle mixture is prepared by mixing silicon carbide micropowder: anhydrous ethanol with a mass ratio of 7:1; in S2, the sample 305 is heat-treated at 150 °C for 2 hours, and then fired at 1600 °C for 2 hours. High temperature graphic mark;

Alternatively, in S1, the high-temperature speckle mixture is prepared by mixing the alumina micropowder: water mass ratio of 3:1; in S2, the sample 305 is heat-treated at 200 °C for 3 hours, and then fired at 1600 °C for 2 hours to obtain a high temperature resistant mixture. Graphic markers.

Example 7:

On the basis of Example 6, in S5, open the vacuum pump (401) and the vacuum valve (403), observe the air pressure inside the furnace module (110) through the pressure gauge (404), and pump the air pressure inside the furnace module (110) to 6×10 ⁻³ Pa～100Pa, close the vacuum valve (403) and the vacuum pump (401); preferably, the internal air pressure of the furnace module 110 is pumped to 6×10 ⁻³ Pa or 50Pa or 100Pa.

In this embodiment, the vacuum unit 400 is used to provide a vacuum environment for the furnace module 110, the vacuum pump 401 is used to provide power for the vacuum unit 400, the vacuum valve 403 is a switch for controlling the vacuum unit 400, the pressure gauge 404 is used to observe the air pressure in the furnace module 110 . The air pressure inside the furnace module 110 ranges from 0.006Pa to 100Pa, because the optical detection unit 500 extracts the picture information in the furnace module 110 outside the furnace body unit 100. If there is a lot of air in the furnace module 110, "heat flow disturbance" will be formed. phenomenon, resulting in inaccurate picture information extracted by the optical detection unit 500 . When the pressure is lower than 0.006Pa, the equipment manufacturing cost will be too high. When the pressure is higher than 100Pa, the air in the furnace module 110 can form a phenomenon of "heat flow disturbance". Therefore, the range of the internal pressure of the furnace module 110 is set to 0.006Pa～100Pa.

Example 8:

On the basis of Example 7, in S7, the power supply (303) is turned on, the current input mode of the coil (301) is adjusted, the magnetic field intensity inside the furnace module (110) is controlled by the current of the power supply (303), and the magnetic field intensity is adjusted to 0.05 ~50mT, the current input mode of the coil (301) is direct current or alternating current, so that the magnetic field inside the furnace module (110) is a static magnetic field or an alternating magnetic field;

In S8, the heating temperature measurement module (210) is turned on, the sample (305) of the material to be detected is heated to the experimental temperature, the industrial camera (501) is turned on, and the picture information of the high temperature resistance graphic mark is recorded, and the recording time interval is 0 ~12000ms;

In S9, the initial picture information of the high temperature resistance graphic mark is used as a reference picture, and the strain change analysis is performed on the high temperature resistance graphic mark pictures one by one, and the strain/displacement-time, strain/displacement-temperature of the sample (305) under the external magnetic field environment are obtained. Curve and sample (305) instantaneous strain distribution cloud map.

Preferably, the magnetic field strength is 0.05mT or 25mT or 50mT; the recording time interval is 1000ms or 6000ms or 12000ms.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (17)

1. A device for visualizing high-temperature performance of materials with an external magnetic field, characterized in that it includes:

   A furnace body unit (100) is used to provide a space for testing materials to be tested; a visual window module (130) is provided on the furnace body unit (100), and the visual window module (130) is used to provide a window for the optical detection unit (500) to detect the material to be detected;

   a heating and cooling unit (200) for heating the material to be tested and cooling the furnace body unit (100); a cooling module (220) of the heating and cooling unit (200) is arranged outside the furnace body unit (100);

   a magnetic supply unit (300) for providing a magnetic field environment for the material to be detected;

   a vacuum unit (400) for providing a vacuum environment for the inner space of the furnace unit (100);

   The optical detection unit (500) is used for real-time detection of changes in the material to be detected; the optical detection unit (500) is arranged outside the furnace body unit (100) and matches the height of the visible window module (130).
2. The detection device according to claim 1, characterized in that: the furnace body unit (100) comprises a furnace hearth module (110), and the furnace hearth module (110) includes a furnace shell (111), a furnace shell (111) and a furnace shell (111). ) furnace bricks (112) whose inner walls are in contact with each other and are hollow inside; the furnace shell (111) and the upper surfaces of the furnace bricks (112) are provided with corresponding heating and cooling units (200) at corresponding positions Holes, corresponding positions on the sides of the furnace shell (111) and the furnace bricks (112) are provided with holes matched with the vacuum unit (400).
3. A detection device according to claim 2, characterized in that: the furnace shell (111) is provided with a furnace door module (120), and the furnace door module (120) comprises a hinged joint with the furnace shell (111). A furnace door (121), a furnace door heat-resistant rubber ring (122) arranged on the inner surface of the furnace door (121), a furnace door buckle (124) is provided at a non-hinged end of the furnace door (121), and the furnace door The buckle (124) cooperates with the door bolt screw (125) and the door bolt nut (126) to press the furnace door (121) on the furnace shell (111).
4. A detection device according to claim 3, characterized in that: the furnace door (121) is provided with a visible window module (130), and the visible window module (130) comprises a window module (130) provided on the furnace door (121). ), the quartz glass (132) located on the outside of the furnace door (121) and covering the visual window (131), the heat-resistant A rubber ring (133), the quartz glass (132) and the heat-resistant rubber ring (133) are fixed on the outer surface of the furnace door (121) through a flange (134).
5. A detection device according to claim 2, characterized in that: the heating and cooling unit (200) comprises a heating temperature measurement module (210), and the heating temperature measurement module (210) comprises a furnace module (110) a heating element (211) inside, a thermocouple (212) installed in the furnace module (110) and covered with a corundum protective sheath, a heating controller (213) connected to the heating element (211) and the thermocouple (212), The heating element (211) protrudes into the interior of the furnace module (110) through the furnace shell (111) and the holes on the upper surface of the furnace brick (112).
6. A detection device according to claim 2, characterized in that: the cooling module (220) comprises a water pump (221), a cooling water pipeline ( 222).
7. A detection device according to claim 2, characterized in that: the magnetic supply unit (300) comprises a power supply (303) located outside the furnace body unit (100), and a coil (301) connected to the power supply (303) , a sample stage (304) located in the furnace module (110); the furnace brick (112) is provided with a magnetic coil hollow slot (113), and the coil (301) is placed in the magnetic coil hollow slot In (113), the side surfaces of the furnace brick (112) and the furnace shell (111) are provided with wire holes (302), and both ends of the coil (301) pass through the wire holes (302) and The power supply (303) is connected.
8. A detection device according to claim 7, characterized in that: the sample stage (304) is a silicon carbide ceramic or alumina ceramic or graphite square stage, and the coil (301) is mica-coated pure nickel The core is made of high temperature resistant coil, and the power supply (303) is a DC power supply or an AC power supply.
9. A detection device according to claims 2-8, characterized in that: the vacuum unit (400) comprises a vacuum pump (401), an air extraction pipe (402) connecting the vacuum pump (401) and the furnace module (110), a device A vacuum valve (403) and a pressure gauge (404) on an air extraction pipe (402), the air extraction pipe (402) being communicated with the inner space of the furnace module (110).
10. The detection device according to any one of claims 1-9, characterized in that: the optical detection unit (500) comprises a fixed bracket (505) and two industrial cameras (501) arranged on the fixed bracket (505). ), an active light source (502) arranged on a fixed bracket (505) and located between two industrial cameras (501), a band-pass filter lens (503) and a central A grayscale mirror (504) is provided, and the two industrial cameras (501) are perpendicular to each other.
11. A method for visual detection of high temperature properties of materials with an external magnetic field, characterized in that: using a visual detection device for high temperature properties of materials with an external magnetic field as described in any one of claims 1-10, comprising the following steps:

    S1, configure high temperature speckle mixture;

    S2, draw a graphic mark of high temperature resistance;

    S3, put in the material to be tested; place the sample (305) of the material to be tested from the furnace door (121) on the sample table (304), adjust the position of the sample (305) so that the sample (305) Coaxial with the coil (301), close the furnace door (121) and tighten the door bolt nut (126);

    S4, turn on the cooling water; connect the water pump (221) with the cooling water outlet (224), the cooling water inlet (223) with the cooling water source, turn on the water pump (221), and the cooling water flows from the bottom through the cooling water pipeline (222) And flow around the outer surface of the furnace shell (111);

    S5, evacuating; the inner space of the furnace module (110) is evacuated into a vacuum environment by the vacuum unit (400);

    S6, turn on the active light source; turn on the active light source (502), use the industrial camera (501) to record the initial picture information of the heat-resistant graphic mark, keep the active light source (502) on, and suspend the industrial camera (501) for the image of the high-temperature resistant graphic mark information record;

    S7, supplying magnetism; providing a magnetic field environment for the sample (305) through the supplying magnet unit (300);

    S8, start the test;

    S9, data collection;

    S10, when the test is over, stop the industrial camera (501) from recording the picture information of the high temperature resistant graphic mark, stop heating, and wait for the furnace module (110) to cool down to below 200°C, open the vacuum valve (403), and close the water pump (221).
12. A detection method according to claim 11, characterized in that: in S1, the solute of the high temperature speckle mixture is alumina micropowder or silicon dioxide micropowder or silicon carbide micropowder or iron-aluminum spinel micropowder or oxidized The cobaltous micropowder and the solvent are acetone or absolute ethanol or water, and the mass ratio of the solute to the solvent is (3-10):1.
13. A detection method according to claim 11, characterized in that: in S2, the high-temperature speckle mixture is sprayed on the surface to be tested of the sample (305), and the sample (305) is subjected to a temperature of 110-200° C. After heat treatment for 1 to 3 hours, and then fired at 1600 ℃ for 1 to 2 hours to obtain high temperature resistant graphic marks.
14. A detection method according to claim 11, characterized in that: in S5, the vacuum pump (401) and the vacuum valve (403) are turned on, the pressure inside the furnace module (110) is observed through a pressure gauge (404), and the furnace module (110) is (110) The air pressure inside is pumped to 6×10 ⁻³ Pa～100Pa, and the vacuum valve (403) and the vacuum pump (401) are closed.
15. A detection method according to claim 14, characterized in that: in S7, the power supply (303) is turned on, the current input mode of the coil (301) is adjusted, and the current inside the furnace module (110) is controlled by the current of the power supply (303). Magnetic field strength, adjust the magnetic field strength to 0.05-50mT, and the current input mode of the coil (301) is direct current or alternating current, so that the magnetic field inside the furnace module (110) is a static magnetic field or an alternating magnetic field.
16. A detection method according to claim 15, characterized in that: in S8, the heating temperature measurement module (210) is turned on, the sample (305) of the material to be detected is heated to the experimental temperature, and the industrial camera (501) is turned on, Record the picture information of the high temperature resistant graphic mark, and the recording time interval is 0~12000ms.
17. A detection method according to claim 16, characterized in that: in S9, using the initial picture information of the high temperature resistance graphic mark as a reference picture, the strain change analysis is carried out on the high temperature resistance graphic mark pictures one by one, and the results obtained under the external magnetic field environment are obtained. The strain/displacement-time, strain/displacement-temperature curves of the sample (305) and the cloud map of the instantaneous strain distribution of the sample (305).

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