Ultrafast heating device and temperature control method for high-temperature test of diamond optical window

Abstract

The invention provides an ultrafast heating device and a temperature control method for high-temperature testing of a diamond optical window, and the heating device is characterized in that a mounting groove for fixing the diamond optical window is formed in a metal mounting assembly, and the shape of the mounting groove is matched with that of the diamond optical window; a mounting gap between the diamond optical window and the mounting groove is filled with the flexible heat-conducting medium layer so as to form a continuous heat conduction interface; the electromagnetic induction heating unit comprises an induction coil surrounding the metal mounting assembly, and a heating host for providing variable-frequency alternating current for the induction coil; the electromagnetic induction heating unit is covered with the heat insulation shielding structure, and a light through hole aligned with the light path area of the diamond optical window is formed in the heat insulation shielding structure. According to the scheme, a device and a method basis are provided for high-temperature testing of the large-size diamond optical window with uniform and ultrafast heating, low optical path interference and high temperature control precision at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical testing, in particular to an ultrafast heating device and temperature control method for high-temperature testing of a diamond optical window. BACKGROUND

[0002] The heating methods used in high-temperature performance testing of optical windows can be divided into two types. One is to heat the window to a certain temperature first and then take out the window for optical performance testing on an optical platform. This method is cumbersome to operate, the temperature of the window cannot be controlled after being taken out, and the test results are not accurate. The other method is to test while heating the window. This method is mainly used for heating test samples in optical testing instruments. The heating devices of this type are generally small in size, and the heating objects are mainly small-sized test pieces, so they cannot meet the heating needs of large-area optical windows. In addition to the above-mentioned heating methods, the current heating methods are also far from the actual state of instantaneous heating when the window is in use in terms of heating rate. Especially for the increasingly urgent extreme complex environment, the temperature change of a large-area optical window in a very short time will reach several hundred degrees. This rapid and efficient heating requirement has not been solved in current high-temperature optical testing.

[0003] Under the above-mentioned background of optical windows, there are special contradictions in testing of diamond optical windows. As an ideal window material in extreme environments, the high-temperature optical performance degradation threshold (such as a decrease in transmittance for a long time > 800℃) of the diamond optical window must be verified by in-situ high-speed precise temperature control. However, the existing technology cannot simultaneously meet the following requirements: uniform ultrafast heating of a large-size window (thermal inertia constraint), low interference of an optical path (heater device radiation pollution), and compensation for thermal expansion mismatch (interface thermal resistance leads to temperature control lag). SUMMARY

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide an ultrafast heating device and temperature control method for high-temperature testing of a diamond optical window, so as to simultaneously meet the requirements of uniform ultrafast heating, low interference of an optical path, and high-precision temperature control for high-temperature testing of a large-size diamond optical window.

[0005] In a first aspect, the present application provides an ultrafast heating device for high-temperature testing of a diamond optical window, comprising: a metal mounting assembly, an installation groove for fixing the diamond optical window is arranged inside the metal mounting assembly, and the shape of the installation groove is matched with the diamond optical window; a flexible heat-conducting medium layer, the flexible heat-conducting medium layer is filled in an installation gap between the diamond optical window and the installation groove to form a continuous heat conduction interface; An electromagnetic induction heating unit, which comprises an induction coil enclosed outside the metal mounting assembly, and a heating host providing variable frequency alternating current for the induction coil; A heat-insulating shielding structure, which is arranged outside the electromagnetic induction heating unit, and has a light transmission hole aligned with the light path area of the diamond optical window.

[0006] The technical scheme provided by the embodiment of the application further comprises a multi-channel temperature measuring mechanism, which comprises at least two groups of temperature sensors embedded in the flexible heat-conducting medium layer, and is used for monitoring the surface temperature of the diamond optical window in real time.

[0007] According to the technical scheme provided by the embodiment of the application, the installation groove is a square groove structure, the depth of which is slightly greater than the thickness of the diamond optical window, and the installation gap between the inner wall of the groove and the side wall of the diamond optical window is 0.5-1 mm, and the flexible heat-conducting medium layer completely fills the installation gap and covers the upper and lower surface edge areas of the diamond optical window.

[0008] According to the technical scheme provided by the embodiment of the application, the flexible heat-conducting medium layer is flexible graphite paper, the thickness of which is 0.3-0.4 mm, and the thermal conductivity coefficient of the flexible graphite paper is greater than or equal to 150 W / (m·K).

[0009] According to the technical scheme provided by the embodiment of the application, a positioning mechanism is arranged between the metal mounting assembly and the induction coil, the positioning mechanism comprises a ceramic positioning bolt penetrating through the side wall of the metal mounting assembly, and is used for fixing the axial and radial positions of the metal mounting assembly in the induction coil.

[0010] According to the technical scheme provided by the embodiment of the application, the temperature measurement end of the temperature sensor is embedded at a position satisfying that at least one group of temperature sensors contact the upper surface edge area of the diamond optical window, at least one group of temperature sensors contact the lower surface edge area of the diamond optical window, and all the temperature sensors are covered by the flexible heat-conducting medium layer.

[0011] According to the technical scheme provided by the embodiment of the application, the inner wall of the light transmission hole is coated with a ceramic coating layer, and the temperature resistance grade of the ceramic coating layer is greater than or equal to 1500 DEG C.

[0012] In the second aspect, the application provides a heating and temperature control method for high-temperature testing of a diamond optical window, which is realized based on the ultrafast heating device for high-temperature testing of a diamond optical window as described above, and comprises the following steps: The diamond optical window is placed in the installation groove, and the flexible heat-conducting medium layer is filled in the installation gap to form a close thermal contact; The heating host is controlled to be turned on, and the induction coil is driven by variable frequency alternating current to generate eddy current heating in the metal mounting assembly, and the heat of the eddy current heating is conducted to the diamond optical window through the flexible heat conduction medium layer; Real-time temperature data of a multi-channel temperature measurement mechanism are collected in real time, and the output power of the heating host is dynamically adjusted according to the real-time temperature data, so that the diamond optical window reaches a target temperature at a preset temperature rising rate and is maintained stable. Wherein, the heat radiation and stray light interference of the electromagnetic induction unit to the optical path are blocked by the heat shielding structure.

[0013] According to the technical scheme provided by the embodiment of the application, the output power of the heating host is dynamically adjusted according to the real-time temperature data, including the following steps: The real-time average value of all the real-time temperature data is calculated; If the absolute value of the difference between the real-time average value and the target temperature is greater than a first preset temperature, the highest frequency band output of the frequency converter is used for rapid heating; If the absolute value of the difference between the real-time average value and the target temperature is greater than a second preset temperature and less than or equal to the first preset temperature, the output of the intermediate frequency band is switched to and the PID algorithm temperature control is started; If the absolute value of the difference between the real-time average value and the target temperature is less than or equal to the second preset temperature, the low-frequency temperature maintaining mode is switched to.

[0014] According to the technical scheme provided by the embodiment of the application, the following steps are further included: The real-time temperature point temperature difference between every two real-time temperature data is calculated, and the maximum real-time temperature point temperature difference is taken as the maximum temperature difference; If the maximum temperature difference is greater than or equal to a third preset temperature, the current power of the heating host is automatically reduced and an alarm is triggered.

[0015] Compared with the prior art, the application has the beneficial effects that the application breaks through the bottleneck of large-area window ultrafast heating, directly heats the metal component (non-diamond) through electromagnetic induction eddy current, realizes 100-150℃ / s transient temperature rise by using the high electrical conductivity of metal, constructs an ultra-low thermal resistance interface by combining a flexible heat-conducting medium layer (graphite paper), and makes the heat conduction to the diamond optical window with an efficiency of >95%, which improves the heating rate compared with the traditional heat radiation. At the same time, the optical test accuracy under extreme temperature is ensured: the combination of the heat shield structure and the precise alignment light transmission hole structure suppresses the stray light intensity of the heating area, and meets the signal-to-noise ratio requirement (background interference <0.5%) of high-temperature transmittance / emissivity test. In addition, the temperature control failure caused by thermal expansion mismatch is solved: the compressibility of the flexible graphite medium layer (0.3-0.4mm) compensates for the thermal expansion difference between the metal and the diamond, and the interface contact pressure is still >0.3MPa at 1500℃ high temperature, avoiding the stepwise increase of thermal resistance. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structure schematic diagram of an ultrafast heating device for high-temperature test of a diamond optical window is provided for the embodiments of the application. Figure 2 A structure schematic diagram of a flexible heat-conducting medium layer and a temperature sensor is provided for the embodiments of the application. Figure 3 A structure schematic diagram of a diamond optical window and a metal mounting component is provided for the embodiments of the application. Figure 4 A step flow chart of a temperature control method for high-temperature test of a diamond optical window is provided for the embodiments of the application.

[0017] The text annotations in the drawings represent: 1, induction coil; 2, metal mounting component; 3, diamond optical window; 4, flexible heat-conducting medium layer; 5, temperature sensor; 6, positioning mechanism; 7, heat shield structure. DETAILED DESCRIPTION

[0018] The application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and not to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0019] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and embodiments.

[0020] Embodiment 1 As mentioned in the background, in order to solve the problems in the prior art, the present application provides an ultrafast heating device for high-temperature testing of a diamond optical window, as shown in Figures 1-3 The device comprises: a metal mounting assembly 2, which is internally provided with a mounting groove for fixing a diamond optical window 3, the mounting groove being shaped to match the diamond optical window 3; a flexible heat-conducting medium layer 4, which fills a mounting gap between the diamond optical window 3 and the mounting groove to form a continuous heat-conducting interface; Specifically, a flexible graphite gasket of appropriate size is cut as the flexible heat-conducting medium layer 4, the graphite gasket having a thickness of 0.3-0.4 mm, a temperature sensor 5 position on the mounting assembly is confirmed, and the temperature sensor 5 is connected to a temperature display and storage device.

[0021] an electromagnetic induction heating unit, which comprises an induction coil 1 surrounding the metal mounting assembly 2 and a heating host providing variable-frequency alternating current for the induction coil 1; a heat-insulating shielding structure, which is provided outside the electromagnetic induction heating unit, and is provided with a light transmission hole aligned with a light path area of the diamond optical window 3.

[0022] Specifically, the metal mounting assembly 2 is made of a high-temperature-resistant alloy (such as Inconel 600) into a cylinder, and a square mounting groove is formed in the center. After the diamond optical window 3 (100 mm x 100 mm x 1 mm) is embedded in the mounting groove, a 0.8 mm gap is formed between the inner wall of the groove and the side wall of the window. The flexible heat-conducting medium layer 4 can be selected as a flexible graphite paper (thickness 0.35 mm, thermal conductivity 200 W / (m·K)) to fill the gap and extend to cover the upper and lower edges of the window by 5 mm wide, forming a continuous heat-conducting interface without air gap. The induction coil 1 coaxially surrounds the metal assembly, and the heating host outputs variable-frequency alternating current of 1-20 kHz. The heat-insulating shielding structure is made of stainless steel and ceramic fiber structure, and the light transmission hole with a diameter of 60 mm is directly opposite to the center of the window.

[0023] Specifically, the technical principle: electromagnetic eddy current is generated on the surface of the metal assembly, and the diamond ultra-high thermal conductivity (>2000 W / (m·K)) is used to realize millisecond-level heat diffusion through the graphite medium, avoiding direct heating of the diamond (non-conductive body), and solving the problem of uniform thermal coupling of large-area windows (≥100 mm). According to the temperature requirements of high-temperature performance test, the electromagnetic induction heating process is set. During the heating process, the induction coil 1 is connected to the alternating current to generate an alternating magnetic field around the coil. The alternating magnetic field and the metal assembly placed in it induce an electric current. The current flows in the metal conductor and has a heating effect, which is then converted into heat energy. Because the flexible graphite and diamond have good thermal conductivity, the heat generated by the metal assembly is conducted to the diamond window in a very short time in the form of thermal contact. During the electromagnetic induction heating process, the heating host uses a frequency converter for control. It not only has a wide temperature adjustment range, but also has a fast heating speed, good temperature uniformity, and avoids abnormal overheating and other conditions.

[0024] In a preferred embodiment, a multi-channel temperature measurement mechanism is further included, which comprises no less than two groups of temperature sensors 5 embedded in the flexible heat-conducting medium layer 4, for real-time monitoring of the surface temperature of the diamond optical window 3.

[0025] Specifically, the multi-channel temperature measurement mechanism includes 4 groups of K-type thermocouples embedded in flexible graphite paper, with 2 groups symmetrically arranged on the upper surface edge and 2 groups symmetrically arranged on the lower surface edge. The thermocouple probe is in physical contact with the diamond optical window 3 and is completely covered by the graphite paper. The data acquisition card records the temperature at a frequency of 100 Hz. Multi-point monitoring captures the thermal hysteresis effect in the edge area (due to the longest heat conduction path), real-time feedback of the window temperature field distribution, and identification of local overheating risks (such as ±15℃ temperature difference warning).

[0026] In a preferred embodiment, the mounting groove is a square groove structure with a depth slightly greater than the thickness of the diamond optical window 3, and the mounting gap between the inner wall of the groove and the side wall of the diamond optical window 3 is 0.5-1 mm. The flexible heat-conducting medium layer 4 completely fills the mounting gap and covers the upper and lower surface edge areas of the diamond optical window 3.

[0027] Specifically, the square groove structure has a groove depth of 0.8 mm (less than the window thickness of 1 mm), which makes the window protrude 0.2 mm for easy optical contact. The gap of 0.8 mm is verified by fluid simulation: <0.5 mm leads to insufficient filling, and >1 mm significantly increases the thermal resistance. The graphite paper completely covers the gap and extends 5 mm upward / downward, forming a three-dimensional heat conduction network. The gap size design reduces the thermal resistance by 37% (compared to the no-covering scheme), achieving 100℃ / s transient heating.

[0028] In a preferred embodiment, the flexible heat-conducting medium layer 4 is flexible graphite paper, with a thickness of 0.3-0.4 mm, and a heat-conducting coefficient ≥ 150 W / (m·K).

[0029] Specifically, the expanded graphite paper (density 1.1 g / cm 3 ) is compacted to a thickness of 0.35 mm±0.02 mm. The heat-conducting coefficient ≥ 150 W / (m·K) ensures that the heat diffusion rate matches the diamond properties (maintains high heat conduction at >1200℃). The compressibility of the graphite paper compensates for the difference in thermal expansion coefficients between the metal and the diamond (metal α ≈14×10 -6 / K vs diamond α ≈1×10 -6 / K), avoids interface separation caused by thermal stress at high temperatures, and maintains >95% heat conduction efficiency up to 1500℃.

[0030] In a preferred embodiment, a positioning mechanism 6 is provided between the metal mounting assembly 2 and the induction coil 1, which includes ceramic positioning pins penetrating through the side wall of the metal mounting assembly 2, for fixing the axial and radial position of the metal mounting assembly 2 in the induction coil 1.

[0031] Specifically, the ceramic positioning pins (Al2O3 content ≥ 99%) penetrate through the side wall of the metal assembly, and the ends are tightly pressed against the skeleton of the induction coil 1. The gap between the pin body and the metal assembly is 0.1 mm, which ensures axial fixation without hindering thermal expansion. The ceramic insulation blocks the eddy current path, avoiding heating of the positioning pins, and suppressing the thermal conduction fluctuations caused by displacement of the assembly (improving temperature control stability by ±0.5℃).

[0032] In a preferred embodiment, the temperature sensing end of the temperature sensor 5 is embedded in a position that satisfies: at least one group of the temperature sensor 5 contacts the edge area of the upper surface of the diamond optical window 3; at least one group of the temperature sensor 5 contacts the edge area of the lower surface of the diamond optical window 3; and all the temperature sensors 5 are covered by the flexible heat-conducting medium layer 4.

[0033] Specifically, the upper surface thermocouple is 2 mm away from the window edge, and the lower surface thermocouple is 3 mm away from the edge (avoiding the optical test area). The graphite covering thickness is 0.4 mm, ensuring that the thermal contact resistance is <10 -4 m 2 K / W. The upper and lower surface temperature difference monitoring sensitivity reaches ±1℃, and the warning window thermal warping risk is avoided.

[0034] In a preferred embodiment, the inner wall of the light transmission hole is coated with a ceramic coating with a temperature resistance grade ≥ 1500℃.

[0035] Specifically, the inner wall is sprayed with a YSZ coating with a thickness of 50 pm, a melting point of ≥2500°C, a thermal conductivity of about 1.0-1.5 W / (m·K), and a reflectivity of <2%, thereby insulating the heat radiation of the induction coil 1 and the metal mounting assembly 2.

[0036] The overall installation process is as follows: the diamond optical window 3 is installed in the square mounting slot of the mounting assembly according to the designed structure, and it is ensured that each temperature sensing point has close contact with the temperature sensor 5 and the window piece; the flexible graphite gasket is wrapped around the upper and lower surface edges of the diamond optical window 3, and it is ensured that the flexible graphite gasket is fully filled between the diamond optical window 3 and the mounting slot without any gap. After the installation is completed, the entire assembly is placed in the induction coil 1 and fixed by the ceramic positioning bolt. Finally, the window assembly and the induction coil 1 are covered inside by using the heat shielding structure, except for the area where the light path enters and exits.

[0037] Embodiment 2 Based on Embodiment 1, this embodiment proposes a heating and temperature control method for high-temperature testing of a diamond optical window 3, which is implemented based on the heating and temperature control device for high-temperature testing of a diamond optical window 3 as described in Embodiment 1, as shown in Figure 4 The method comprises the following steps: S1, placing the diamond optical window 3 in the mounting slot and filling the flexible heat-conducting medium layer 4 in the mounting gap to form close thermal contact; S2, controlling the heating host to be turned on, and driving the induction coil 1 to generate eddy current heating in the metal mounting assembly 2 by variable-frequency alternating current, and the heat generated by the eddy current heating is conducted to the diamond optical window 3 through the flexible heat-conducting medium layer 4; S3, collecting real-time temperature data of the multi-channel temperature measurement mechanism in real time, and dynamically adjusting the output power of the heating host according to the real-time temperature data, so that the diamond optical window 3 reaches the target temperature at a preset heating rate and maintains stability; Wherein, the heat radiation and stray light interference of the electromagnetic induction unit on the light path are blocked by the heat shielding structure.

[0038] In a preferred embodiment, the step of dynamically adjusting the output power of the heating host according to the real-time temperature data comprises the following steps: calculating the real-time average value of all the real-time temperature data; if the absolute value of the difference between the real-time average value and the target temperature is greater than a first preset temperature, then the highest frequency band output of the frequency converter is used for rapid heating; if the absolute value of the difference between the real-time average value and the target temperature is greater than a second preset temperature and less than or equal to the first preset temperature, then the medium frequency band output is switched to and the PID algorithm is started for temperature control; If the absolute value of the difference between the real-time average value and the target temperature is less than or equal to the second preset temperature, switch to a low-frequency holding mode.

[0039] Specifically, when the temperature difference is greater than 50°C (first preset temperature): 20 kHz full power output (heating rate 150°C / s); when the temperature difference is 10°C (second preset temperature) < temperature difference ≤ 50°C: switch to 5 kHz intermediate frequency + PID (adjustment accuracy ± 5°C); when the temperature difference is less than or equal to 10°C: 1 kHz low-frequency holding (fluctuation ± 0.5°C); the technical principle followed: high frequency band uses skin effect to concentrate heating on the surface layer, and low frequency band realizes bulk uniform heating. Avoid overshoot (overshoot < 2%), and the total time for heating to 1500°C is shortened by 40%.

[0040] In a preferred embodiment, the following steps are further included: Calculate the real-time temperature measurement point temperature difference between every two real-time temperature data, and take the maximum real-time temperature measurement point temperature difference as the maximum temperature difference; If the maximum temperature difference is greater than or equal to a third preset temperature, automatically reduce the current power of the heating host and trigger an alarm.

[0041] Specifically, if ΔT max ≥ 15°C (third preset temperature): the current power of the heating host is reduced to 50% of the current power and an audible and visual alarm is triggered.

[0042] The principles and implementation modes of the present application are described herein using specific examples, and the above examples are only used to help understand the method and its core idea. The above description is only a preferred embodiment of the present application. It should be noted that due to the limited nature of the written expression, there are objectively infinite specific structures, and for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. An ultrafast heating device for high-temperature testing of diamond optical windows, characterized in that, include: Metal mounting assembly (2), the metal mounting assembly (2) has a mounting groove inside for fixing the diamond optical window (3), the shape of the mounting groove is adapted to the diamond optical window (3); A flexible thermally conductive medium layer (4) is filled in the mounting gap between the diamond optical window (3) and the mounting groove to form a continuous thermal conduction interface; The electromagnetic induction heating unit includes an induction coil (1) surrounding the metal mounting assembly (2) and a heating host that provides variable frequency AC power to the induction coil (1). A heat insulation shielding structure (7) is provided on the outside of the electromagnetic induction heating unit. The heat insulation shielding structure (7) has a light-transmitting hole that is aligned with the optical path area of ​​the diamond optical window (3).

2. The ultrafast heating device for high-temperature testing of diamond optical windows according to claim 1, characterized in that: It also includes a multi-channel temperature measurement mechanism, which includes no less than two sets of temperature sensors (5) embedded in the flexible thermal conductive medium layer (4) for real-time monitoring of the surface temperature of the diamond optical window (3).

3. The ultrafast heating device for high-temperature testing of diamond optical windows according to claim 1, characterized in that: The mounting groove is a square groove structure with a depth slightly greater than the thickness of the diamond optical window (3). The mounting gap between the inner wall of the groove and the side wall of the diamond optical window (3) is 0.5-1mm. The flexible thermal conductive medium layer (4) completely fills the mounting gap and covers the upper and lower surface edge areas of the diamond optical window (3).

4. The ultrafast heating device for high-temperature testing of diamond optical windows according to claim 1, characterized in that: The flexible thermal conductive medium layer (4) is flexible graphite paper with a thickness of 0.3-0.4 mm and a thermal conductivity of ≥150 W / (m·K).

5. The ultrafast heating device for high-temperature testing of diamond optical windows according to claim 1, characterized in that: A positioning mechanism (6) is provided between the metal mounting assembly (2) and the induction coil (1). The positioning mechanism (6) includes a ceramic positioning bolt that penetrates the side wall of the metal mounting assembly (2) for fixing the axial and radial positions of the metal mounting assembly (2) within the induction coil (1).

6. The ultrafast heating device for high-temperature testing of diamond optical windows according to claim 2, characterized in that: The temperature sensor (5) is embedded in a position that satisfies the following conditions: at least one set of temperature sensors (5) contacts the upper surface edge region of the diamond optical window (3); at least one set of temperature sensors (5) contacts the lower surface edge region of the diamond optical window (3); and all temperature sensors (5) are covered by the flexible thermal conductive medium layer (4).

7. The ultrafast heating device for high-temperature testing of diamond optical windows according to claim 1, characterized in that: The inner wall of the light-transmitting hole is covered with a ceramic coating with a temperature resistance rating of ≥1500℃.

8. A temperature control method for high-temperature testing of diamond optical windows, implemented based on the ultrafast heating device for high-temperature testing of diamond optical windows as described in any one of claims 1-7, characterized in that: Includes the following steps: The diamond optical window (3) is placed into the mounting groove, and the flexible thermally conductive medium layer (4) is filled in the mounting gap to form a tight thermal contact; The heating host is turned on and the induction coil (1) is driven by the variable frequency AC power to generate eddy current heating in the metal mounting assembly (2). The heat from the eddy current heating is conducted to the diamond optical window (3) through the flexible thermal conductive medium layer (4). Real-time temperature data of the multi-channel temperature measuring mechanism is collected in real time, and the output power of the heating host is dynamically adjusted according to the real-time temperature data so that the diamond optical window (3) reaches the target temperature at a preset heating rate and remains stable. The heat insulation shielding structure (7) blocks the thermal radiation and stray light interference of the electromagnetic induction unit to the optical path.

9. The temperature control method for high-temperature testing of diamond optical windows according to claim 8, characterized in that: The step of dynamically adjusting the output power of the heating host based on the real-time temperature data includes the following steps: Calculate the real-time average of all the aforementioned real-time temperature data; If the absolute value of the difference between the real-time average value and the target temperature is greater than the first preset temperature, then the highest frequency band output of the frequency converter is used for rapid heating. If the absolute value of the difference between the real-time average value and the target temperature is greater than the second preset temperature and less than or equal to the first preset temperature, then switch to mid-frequency output and start PID algorithm temperature control. If the absolute value of the difference between the real-time average value and the target temperature is less than or equal to the second preset temperature, then switch to low-frequency heat preservation mode.

10. The temperature control method for high-temperature testing of diamond optical windows according to claim 8, characterized in that: It also includes the following steps: Calculate the temperature difference between real-time temperature measurement points between any two real-time temperature data points, and take the largest temperature difference between real-time temperature measurement points as the maximum temperature difference; If the maximum temperature difference is greater than or equal to the third preset temperature, the current power of the heating host will be automatically reduced and an alarm will be triggered.

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