Method and apparatus for microwave heating of pole pieces

Abstract

The embodiment of the application provides a method and device for microwave heating of an electrode sheet, and relates to the technical field of electrode sheet coating. The method for microwave heating of the electrode sheet comprises the following steps: obtaining a thermal image of the electrode sheet output by a thermal imager, that is, the temperature values of various regions on the electrode sheet can be known through the thermal image of the electrode sheet; identifying a second heating region on the electrode sheet according to the thermal image; and controlling a microwave generator to heat the second heating region. In this way, the microwave generator will not heat the regions with higher temperatures on the electrode sheet, but only heat the second heating region with a lower temperature value, so that the temperature uniformity of the electrode sheet is improved, and the yield of subsequent processing is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pole piece coating, in particular to a method and device for microwave heating of a pole piece. BACKGROUND

[0002] The existing coating ovens including microwave ovens are difficult to precisely control the heating effect of the pole piece, and most of them do not consider that the temperature of each region on the pole piece may be different, and each region is not precisely heated, for example, the temperature of the lower region of the pole piece may be insufficiently heated, and the temperature of the higher region of the pole piece may be excessively heated, resulting in poor temperature uniformity of the pole piece and affecting the yield of subsequent processing. SUMMARY

[0003] The purpose of the present application includes providing a method and device for microwave heating of a pole piece, which can compensate for the temperature of the lower region of the pole piece and improve the temperature uniformity of the pole piece.

[0004] Embodiments of the present application can be implemented as follows:

[0005] In a first aspect, the present application provides a method for microwave heating of a pole piece, the method comprising:

[0006] obtaining a thermal image of the pole piece output by a thermal imager;

[0007] identifying a second heating region on the pole piece according to the thermal image;

[0008] controlling a microwave generator to heat the second heating region.

[0009] The method for microwave heating of a pole piece provided by the present application has the following beneficial effects:

[0010] Firstly, the thermal image of the pole piece that has been heated or is being heated is obtained by the thermal imager, so that the temperature values of each region on the pole piece can be known through the thermal image of the pole piece. Understandably, the regions shown in the thermal image of the pole piece are regions that have been heated for a certain period of time, which are regarded as the first heating region. The region with a lower temperature value in the first heating region is determined as the second heating region, and then the microwave generator is used to heat the second heating region. In this way, the microwave generator will not heat the region with a higher temperature on the pole piece, but only heat the second heating region with a lower temperature value, thereby improving the temperature uniformity of the pole piece and improving the yield of subsequent processing.

[0011] In an optional embodiment, identifying the second heating region on the pole piece according to the thermal image comprises:

[0012] dividing the thermal image into a plurality of sequentially arranged point regions;

[0013] identifying a temperature value of the point region;

[0014] determining the point region with the temperature value less than the preset value as the second heating region.

[0015] In this way, the process of identifying the second heating region in the thermal imaging image is simple, fast and high in accuracy.

[0016] In an optional implementation, the controlling the microwave generator to heat the second heating region comprises:

[0017] aligning the microwave generator with the second heating region, and causing the microwave generator to emit microwaves that maximally cover the second heating region without exceeding the second heating region;

[0018] starting the microwave generator to heat the second heating region.

[0019] In this way, the microwave generator can heat the second heating region in the maximum range, and will not heat the non-second heating region of the pole piece in the thermal imaging image, further ensuring the temperature uniformity of the pole piece.

[0020] In an optional implementation, the controlling the microwave generator to heat the second heating region comprises:

[0021] adjusting the height of the microwave generator relative to the second heating region according to the area of the second heating region, so that the microwave generator emits microwaves that maximally cover the second heating region without exceeding the second heating region.

[0022] Because the farther the microwave generator is from the pole piece, the lower the heating efficiency is, and the closer the microwave generator is to the pole piece, the higher the heating efficiency is, by adjusting the height of the microwave generator relative to the second heating region, the microwave generator can emit microwaves that maximally cover the second heating region without exceeding the second heating region.

[0023] In an optional implementation, the controlling the microwave generator to heat the second heating region comprises:

[0024] causing the microwave generator to keep relative stillness with the second heating region, and starting the microwave generator to heat the second heating region; or causing the microwave generator to move in the second heating region, and starting the microwave generator to heat the second heating region in the maximum range.

[0025] In this way, for the second heating area with a smaller area, the microwave range emitted by the microwave generator can basically completely cover the second heating area, so that the microwave generator and the second heating area remain relatively static, and for the second heating area with a larger area, the microwave generator is controlled to move in the second heating area, so that the microwave emitted by the microwave generator gradually heats each part in the second heating area, thereby completing the heating of the entire second heating area.

[0026] In an optional embodiment, the control of the microwave generator to heat the second heating area comprises:

[0027] The microwave generator is controlled to heat the second heating area to the minimum temperature value of the non-second heating area in the thermal imaging map of the pole piece.

[0028] In this way, the temperature of the second heating area can be quickly heated to the minimum temperature value of the non-second heating area in the thermal imaging map of the pole piece, so that the entire pole piece quickly reaches a state of uniform temperature.

[0029] In an optional embodiment, the control of the microwave generator to heat the second heating area comprises:

[0030] In the case where the number of the second heating areas is multiple, the multiple microwave generators are controlled to heat the multiple second heating areas respectively, or the microwave generator is controlled to heat the second heating area with the minimum temperature, or the microwave generator is controlled to heat the second heating area closest to the microwave generator.

[0031] In this way, in the case where the number of the second heating areas is multiple, multiple heating modes can be selected for different application scenarios, and the effect of precise control of heating is achieved.

[0032] In a second aspect, the present application provides a device for microwave heating of a pole piece, which comprises:

[0033] A thermal imager is configured to acquire a thermal imaging map of the pole piece.

[0034] A processor is configured to identify a second heating area on the pole piece according to the thermal imaging map.

[0035] A microwave generator is electrically connected to the processor and is configured to heat the second heating area.

[0036] A driving module is electrically connected to the processor, is connected to the microwave generator, and is configured to drive the microwave generator to move in space.

[0037] The device for microwave heating of a pole piece provided by the present application can heat only the second heating area with a lower temperature value, and can not heat the area with a higher temperature on the pole piece, thereby improving the temperature uniformity of the pole piece and improving the yield of subsequent processing.

[0038] In an optional embodiment, the driving module comprises:

[0039] a first lateral driving mechanism;

[0040] a second lateral driving mechanism mounted on the first lateral driving mechanism, the first lateral driving mechanism being configured to drive the second lateral driving mechanism to move along a first lateral direction;

[0041] a vertical driving mechanism mounted on the second lateral driving mechanism, the second lateral driving mechanism being configured to drive the vertical driving mechanism to move along a second lateral direction, the second lateral direction being perpendicular to the first lateral direction;

[0042] wherein the microwave generator is mounted on the vertical driving mechanism, and the vertical driving mechanism is configured to drive the microwave generator to move along a vertical direction.

[0043] In this way, the driving module can drive the microwave generator to move in three directions that are perpendicular to each other, so that the microwave generator can reach any position in the movement space.

[0044] In an optional embodiment, the device for heating the pole piece by microwaves further comprises:

[0045] a waveguide mounted at the emission end of the microwave generator, the waveguide being configured to guide or split the microwaves emitted by the microwave generator.

[0046] In this way, the waveguide can be used to guide or split the microwaves emitted by the microwave generator, so that the action area of the microwaves emitted by the microwave generator can be more flexibly controlled, and the heating effect on each area of the pole piece can be accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0048] Figure 1 a structural schematic diagram of the device for heating the pole piece by microwaves provided for the first embodiment of the present application;

[0049] Figure 2 an exploded schematic diagram of the device for heating the pole piece by microwaves provided for the first embodiment of the present application;

[0050] Figure 3 a working schematic diagram of the microwave generator and the waveguide;

[0051] Figure 4Fig. 1 is a schematic diagram of the connection of the driving module, the microwave generator and the waveguide tube;

[0052] Figure 5 Fig. 2 is a structure for placing the pole piece in the first mode;

[0053] Figure 6 Fig. 3 is a structure for placing the pole piece in the second mode;

[0054] Figure 7 Fig. 4 is a structure for placing the pole piece in the third mode;

[0055] Figure 8 Fig. 5 is a flow chart of the method for heating the pole piece with microwaves according to the second embodiment of the present application.

[0056] Fig. 1 is a schematic diagram of the connection of the driving module, the microwave generator and the waveguide tube; DETAILED DESCRIPTION

[0057] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0059] It should be noted that similar reference numerals and letters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0060] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0061] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0062] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0063] First embodiment

[0064] Please refer to Figure 1 and Figure 2 The present embodiment provides a device 100 for microwave heating pole piece, which comprises a box body 1, a thermal imager, a driving module 3, a microwave generator 4, a waveguide 5, a first winding roller 6, a second winding roller 7 and a processor (not shown in the figure).

[0065] The first winding roller 6 and the second winding roller 7 are installed in parallel with a space between them in the box body 1, and the end of the first winding roller 6 and the second winding roller 7 is provided with a hand crank 8, which is located outside the box body 1. The pole piece 2 is wound on the first winding roller 6 and the second winding roller 7, and the space between the first winding roller 6 and the second winding roller 7 is used to unfold the pole piece 2.

[0066] The thermal imager, the driving module 3, the microwave generator 4 and the waveguide 5 are all installed in the box body 1. The thermal imager, the driving module 3 and the microwave generator 4 are electrically connected with the processor. The thermal imager is used to obtain the thermal image of the pole piece 2.

[0067] Firstly, the thermal image of the pole piece which has been heated or is being heated is obtained by the thermal imager, that is, the temperature value of each area on the pole piece can be known through the thermal image of the pole piece. Understandably, the area shown in the thermal image of the pole piece is an area which has been heated for a certain period of time, which is regarded as the first heating area.

[0068] The processor is configured to identify a second heating area on the pole piece 2 according to the thermal image, the second heating area being a region with a lower temperature value in the first heating area. Specifically, the processor divides the thermal image into a plurality of sequentially arranged point regions, which can be arranged in the form of a linear array, and determines at least one point region with a temperature value less than a preset value as the second heating area. Of course, a plurality of continuous point regions can also be determined as the second heating area. In this way, the process of identifying the second heating area in the thermal image is simple, fast, and has high accuracy.

[0069] The microwave generator 4 is installed on the driving module 3, which is configured to drive the microwave generator 4 to move in space, and the microwave generator 4 is configured to heat the second heating area.

[0070] In this way, first, the thermal image of the pole piece 2 is obtained by the thermal imager, that is, the temperature values of each region on the pole piece 2 can be known through the thermal image of the pole piece 2, and the region with a lower temperature value is determined as the second heating area. Then, the microwave generator 4 is used to heat the second heating area. In this way, the microwave generator 4 will not heat the region with a higher temperature on the pole piece 2, but only heat the second heating area with a lower temperature value, thereby improving the temperature uniformity of the pole piece 2 and improving the yield of subsequent processing.

[0071] The microwave generator 4 is preferably a variable frequency microwave generator, which outputs a wave band in the interval of 5.85GHz-6.65GHz within 0.1s, and the wave band of the output microwave gradually increases, which can effectively reduce the probability of the accumulation of electric charges on the pole piece 2.

[0072] The waveguide 5 is installed at the emission end of the microwave generator 4, and is configured to guide or distribute the microwave emitted by the microwave generator 4.

[0073] Please refer to Figure 3 The processor can adjust the height of the microwave generator 4 relative to the second heating area according to the area of the second heating area, so that the microwave range emitted by the microwave generator 4 maximally covers the second heating area without exceeding the second heating area. Because the farther the microwave generator 4 is from the pole piece 2, the lower the heating efficiency, and the closer the microwave generator 4 is to the pole piece 2, the higher the heating efficiency, therefore, by adjusting the height of the microwave generator 4 relative to the second heating area, the microwave range emitted by the microwave generator 4 can be maximally controlled to cover the second heating area without exceeding the second heating area.

[0074] The main microwave heating mechanism 14 is connected to the driving module 3, and the main microwave heating mechanism 14 comprises a main microwave generator 15 and a waveguide 5. A plurality of slits 51 can be formed on the waveguide 5, and each slit 51 can emit a beam of microwaves. In this way, the waveguide 5 can guide or distribute the microwaves emitted by the main microwave generator 15, so that the action area of the microwaves emitted by the main microwave generator 15 can be more flexibly controlled, and the heating effect on each area of the pole piece 2 can be accurately controlled to achieve the heating effect on each area.

[0075] In other embodiments, a combination of a single microwave generator 4 and a main microwave heating mechanism 14 can also be used to more flexibly heat each area of the pole piece 2. The main microwave heating mechanism 14 can be arranged on the side of the single microwave generator 4 close to the starting section of the pole piece 2, and the main microwave heating mechanism 14 is used to heat the pole piece to form a first heating area on the pole piece.

[0076] Please refer to Figure 4 The driving module 3 comprises a first transverse driving mechanism 31, a second transverse driving mechanism 32, and a vertical driving mechanism 33. The second transverse driving mechanism 32 is installed on the first transverse driving mechanism 31, and the first transverse driving mechanism 31 is used to drive the second transverse driving mechanism 32 to move along a first transverse direction. The vertical driving mechanism 33 is installed on the second transverse driving mechanism 32, and the second transverse driving mechanism 32 is used to drive the vertical driving mechanism 33 to move along a second transverse direction. The second transverse direction is perpendicular to the first transverse direction. The microwave generator 4 is installed on the vertical driving mechanism 33, and the vertical driving mechanism 33 is used to drive the microwave generator 4 to move along a vertical direction. The waveguide 5 is connected to the microwave generator 4 through the connecting piece 13. In this way, the driving module 3 can drive the microwave generator 4 to move in three directions that are perpendicular to each other, so that the microwave generator 4 can reach any position in the movement space.

[0077] The first transverse driving mechanism 31 can be a lead screw assembly, and the second transverse driving mechanism 32 and the vertical driving mechanism 33 can be air cylinders.

[0078] Please refer to Figure 2 and Figure 5 In this embodiment, the first winding roller 6 and the second winding roller 7 are arranged inside the box body 1, which is suitable for the pole piece 2 with a small drying area. The entrance and exit for the pole piece 2 to pass through do not need to be formed on the box body 1, so that the internal environment of the box body 1 can be in a closed state to avoid microwave leakage.

[0079] Please refer to Figure 6In other embodiments, for the pole piece 2 with a larger drying area, the unwinding device 9 and the winding device 10 can be arranged on the opposite sides of the box body 1, and the inlet and outlet for the pole piece 2 to pass through are formed on the box body 1. The pole piece 2 is wound on the unwinding device 9, passes through the inlet and outlet of the box body 1, and is wound on the winding device 10. The pole piece 2 completes the heating and drying operation in the box body 1.

[0080] Please refer to Figure 7 In other embodiments, for the pole piece 2 with a smaller drying area, a frame body 11 can be arranged in the box body 1, and a clamping piece 12 is arranged on the frame body 11. The clamping piece 12 clamps the pole piece 2, so that the pole piece 2 completes the drying and heating process in the box body 1. In this case, the pole piece 2 is stationary inside the box body 1, and the microwave generator 4 can be used to heat the second heating area on the pole piece 2 one by one.

[0081] Because the thickness of the pole piece 2 is thin, a metal tip is easily formed in the microwave environment. The pole piece 2 after microwave drying will accumulate electric charge, which may cause a discharge phenomenon by breaking through the air. In the present embodiment, a charge leading-out device can also be provided. The charge leading-out device includes a conductive brush or a graphite conductive roller. The charge leading-out device is arranged on the side of the waveguide tube 5 away from the starting end of the pole piece 2 transport. The charge leading-out device quickly leads out the electrons generated during the microwave drying of the pole piece 2, so as to avoid breaking through the air and causing a discharge phenomenon.

[0082] The microwave heating pole piece device 100 provided by the present embodiment has the following beneficial effects:

[0083] 1. The thermal imager is used to obtain a thermal image of the pole piece 2, so as to know the temperature values of each area on the pole piece 2. The area with a lower temperature value is determined as the second heating area. Then, the microwave generator 4 is used to heat the second heating area. In this way, the microwave generator 4 will not heat the area with a higher temperature on the pole piece 2, but only heat the second heating area with a lower temperature value. The temperature uniformity of the pole piece 2 is improved, and the yield of subsequent processing is improved.

[0084] 2. By adjusting the height of the microwave generator 4 relative to the second heating area, the microwave range emitted by the microwave generator 4 can be maximized to cover the second heating area and not exceed the second heating area. The heating effect is accurately controlled.

[0085] 3. The driving module 3 drives the microwave generator 4 to move in three directions perpendicular to each other, so that the microwave generator 4 can reach any position in the movement space. This is suitable for heating any area on the pole piece 2 that needs to be heated.

[0086] Second embodiment

[0087] Please refer to Figure 8The embodiment provides a method for heating the pole piece 2 by microwaves, which can be implemented by using the device provided in the first embodiment, or can be implemented by using a device with similar functions, for example, the driving module 3 in the device can be selected in multiple ways, and the microwave generator 4 can be directly driven by a mechanical arm; the number of microwave generators 4 can also be selected in multiple ways, if the pole piece 2 has more areas to be heated, multiple microwave generators 4 can be arranged, or more waveguides 5 can be arranged.

[0088] The method for heating the pole piece 2 by microwaves provided in the embodiment comprises the following steps:

[0089] S1: Obtain the thermal image of the pole piece 2 output by the thermal imager.

[0090] S2: According to the thermal image, identify the second heating area on the pole piece 2.

[0091] Specifically, the thermal image can be divided into multiple point areas arranged in sequence first, the temperature values of the point areas are identified, and then the point areas with temperature values less than a preset value are determined as the second heating area. In this way, the process of identifying the second heating area in the thermal image is simple, fast and high in identification accuracy.

[0092] S3: Control the microwave generator 4 to heat the second heating area.

[0093] Specifically, S3 can comprise the following steps.

[0094] S31: Control the microwave output end of the microwave generator 4 to be aligned with the second heating area, and maximize the range of microwaves emitted by the microwave generator 4 to cover the second heating area without exceeding the second heating area.

[0095] Because the farther the microwave generator 4 is from the pole piece 2, the lower the heating efficiency is, and the closer the microwave generator 4 is to the pole piece 2, the higher the heating efficiency is, therefore, according to the area of the second heating area, the height of the microwave generator 4 relative to the second heating area is adjusted, so that the range of microwaves emitted by the microwave generator 4 can maximize the coverage of the second heating area without exceeding the second heating area.

[0096] S32: Start the microwave generator 4 to heat the second heating area.

[0097] Specifically, in the case that the pole piece 2 is continuously conveyed in the box body 1 and the area of the second heating area is small, the microwave generator 4 and the second heating area are kept relatively static, and the microwave generator 4 is started to heat the second heating area, so that the range of microwaves emitted by the microwave generator 4 can basically completely cover the second heating area.

[0098] When the pole piece 2 is continuously conveyed in the box 1 and the area of the second heating area is large, the microwave generator 4 is controlled to move in the second heating area, so that the microwave generator 4 gradually heats each part in the second heating area, thereby completing the heating of the entire second heating area.

[0099] When the number of the second heating areas is multiple, the multiple microwave generators 4 are controlled to heat the multiple second heating areas, or the microwave generator 4 is controlled to heat the second heating area with the minimum temperature, or the microwave generator 4 is controlled to heat the second heating area closest to the microwave generator 4. The second heating area with the minimum temperature can be composed of multiple continuous point areas, and the average temperature of the point areas in the second heating area is the minimum.

[0100] In this way, when the number of the second heating areas is multiple, multiple heating modes can be selected for different application scenarios, and the heating is accurately controlled.

[0101] The heating degree of the second heating area can be controlled to heat the second heating area to the minimum temperature value of the non-second heating area of the pole piece 2 in the thermal imaging diagram. In this way, the temperature of the second heating area can be quickly heated to the minimum temperature value of the non-second heating area of the pole piece 2 in the thermal imaging diagram, so that the entire pole piece 2 quickly reaches a state of uniform temperature.

[0102] Of course, the microwave generator 4 can also be controlled to heat the second heating area to the required temperature value required by the process.

[0103] The method for heating the pole piece 2 by the microwave provided by the embodiment has the following beneficial effects:

[0104] 1. The thermal imaging diagram of the pole piece 2 is obtained by the thermal imager, so that the temperature values of the regions on the pole piece 2 are known, and the region with a lower temperature value is determined as the second heating area, and then the microwave generator 4 is used to heat the second heating area. In this way, the microwave generator 4 will not heat the region with a higher temperature on the pole piece 2, but only heat the second heating area with a lower temperature value, thereby improving the temperature uniformity of the pole piece 2 and improving the yield of subsequent processing.

[0105] 2. By adjusting the height of the microwave generator 4 relative to the second heating area, the microwave range emitted by the microwave generator 4 can be maximized to cover the second heating area and not exceed the second heating area, and the heating effect is accurately controlled.

[0106] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of microwave heating an electrode tip, characterized by, The method for heating the pole piece by microwaves comprises: acquiring a thermal image of the pole piece (2) output by the thermal imager; identifying a second heating area on the pole piece (2) according to the thermal image, comprising: dividing the thermal image into a plurality of sequentially arranged point areas; identifying temperature values of the point areas; determining the point areas with temperature values less than a preset value as the second heating area; controlling the microwave generator (4) to heat the second heating area, comprising: aligning a microwave output end of the microwave generator (4) with the second heating area; adjusting a height of the microwave generator (4) relative to the second heating area according to an area of the second heating area, so that the microwave range emitted by the microwave generator (4) maximally covers the second heating area without exceeding the second heating area; and starting the microwave generator (4) to heat the second heating area.

2. The method of claim 1, wherein, The starting the microwave generator (4) to heat the second heating area comprises: keeping the microwave generator (4) and the second heating area relatively static, and starting the microwave generator (4) to heat the second heating area; or making the microwave generator (4) move within the second heating area, and starting the microwave generator (4) to maximally heat the second heating area.

3. The method of claim 1, wherein, The controlling the microwave generator (4) to heat the second heating area comprises: controlling the microwave generator (4) to heat the second heating area to a minimum temperature value of a non-second heating area of the pole piece (2) in the thermal image.

4. The method of claim 1, wherein, The controlling the microwave generator (4) to heat the second heating area comprises: in the case where the number of the second heating areas is multiple, controlling multiple microwave generators (4) to heat multiple second heating areas respectively, or controlling the microwave generator (4) to heat the second heating area with the minimum temperature, or controlling the microwave generator (4) to heat the second heating area closest to the microwave generator (4).

5. An apparatus for microwave heating of pole pieces, characterized in that The device for heating the pole piece by microwaves comprises: a thermal imager for acquiring a thermal image of the pole piece (2); a processor for identifying a second heating area on the pole piece (2) according to the thermal image, comprising: dividing the thermal image into a plurality of sequentially arranged point areas; identifying temperature values of the point areas; and determining the point areas with temperature values less than a preset value as the second heating area; a microwave generator (4); The driving module (3) is electrically connected with the processor, the driving module (3) is connected with the microwave generator (4), and is used for driving the microwave generator (4) to move in space to heat the second heating area, and comprises: controlling the microwave output end of the microwave generator (4) to be aligned with the second heating area, adjusting the height of the microwave generator (4) relative to the second heating area according to the area of the second heating area, so that the microwave emitted by the microwave generator (4) maximally covers the second heating area and does not exceed the second heating area; starting the microwave generator (4) to heat the second heating area.

6. The microwave-heated electrode tip assembly of claim 5, wherein, The driving module (3) comprises: A first transverse driving mechanism (31); A second transverse driving mechanism (32) is installed on the first transverse driving mechanism (31), and the first transverse driving mechanism (31) is used for driving the second transverse driving mechanism (32) to move along a first transverse direction; A vertical driving mechanism (33) is installed on the second transverse driving mechanism (32), and the second transverse driving mechanism (32) is used for driving the vertical driving mechanism (33) to move along a second transverse direction, and the second transverse direction is perpendicular to the first transverse direction; Wherein, the microwave generator (4) is installed on the vertical driving mechanism (33), and the vertical driving mechanism (33) is used for driving the microwave generator (4) to move along a vertical direction.

7. The microwave-heated electrode tip assembly of claim 5, wherein, The device for heating the microwave heating pole piece further comprises: A waveguide (5) is installed at the emission end of the microwave generator (4), and the waveguide (5) is used for guiding or shunting the microwave emitted by the microwave generator (4).

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