Device for testing gas heating of target body in microwave anechoic chamber

Abstract

The utility model discloses a microwave anechoic chamber target body gas heating test device and test method. The device comprises a target body, a wave-transparent furnace, a workbench, a rotating mechanism, a lifting mechanism, a control unit, an air heater, a fan, a hot air pipeline and a cooling water tank. The wave-transparent furnace comprises a furnace body, a furnace cover, a gasket, a guide plate I, a guide plate II, a target body bracket and a temperature sensor; the rotating mechanism comprises a motor, a toothed chuck and a motor cover; the furnace body and the furnace cover are limited through a groove but not fixedly connected, and are lubricated and sealed by high-temperature-resistant grease; the motor drives the toothed chuck to rotate so as to drive the furnace cover to rotate synchronously. According to the heating test device and method, hot gas is adopted for heating, programmed heating of the target body can be maintained in the whole microwave test process, the heating device is far away from the furnace body, a heat source does not interfere the test process, it is guaranteed that a target body rotating system does not affect the measurement precision through the wave-transparent furnace and the polyurethane wave-absorbing screen, and the measurement accuracy is improved. And the measurement result is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of heating devices, in particular to a microwave darkroom target gas heating test device. Background Art

[0002] A microwave darkroom refers to a confined space composed of absorbing materials and metal shielding bodies. This space can effectively prevent multiple reflections of electromagnetic waves, isolate interference from external electromagnetic waves, and provide a stable electromagnetic environment, so that antennas, radars and other electromagnetic wave-related tests in the darkroom can be free from clutter interference, thereby improving test accuracy and efficiency. With the development of hypersonic aircraft and radar detection technology, the influence of heating of aircraft skin components on their electromagnetic characteristics has become important, and it is increasingly important to master the electromagnetic characteristics of the target under high temperature. However, the microwave darkroom is a room temperature environment, and it is impossible to test the electromagnetic performance indicators of the target under a specific high temperature environment. Therefore, the existing microwave test system cannot meet the use requirements. Patent CN117630510A discloses a method and device for testing antenna temperature tolerance, which uses a heating device to heat the antenna and perform signal reception / signal transmission tests on the antenna before its temperature drops to a threshold. The method is simple to operate and has low cost, but because the heating form used is traditional electric heating, it is impossible to avoid the temperature error caused by the continuous cooling of the heating element during the test, and it is even more impossible to perform real-time online heating tests.

[0003] Therefore, there is still a need to develop a microwave darkroom target heating test device that uses air, nitrogen or other inert gases for heating, to achieve online heating, uniform heating and precise temperature control of the target during the microwave darkroom test, to meet the microwave testing requirements of the target under high temperature conditions, and to provide reliable data support for mastering the electromagnetic properties of the target under high temperature conditions. Utility Model Content

[0004] The utility model discloses a microwave darkroom target gas heating test device, which aims to solve the problems existing in the above-mentioned prior art and provide equipment required for uniform heating, precise temperature control and online testing during microwave darkroom radar testing.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A microwave darkroom target gas heating test device comprises a target, a wave-transmitting furnace, a workbench, a rotating mechanism, a lifting mechanism, a control unit, an air heater, a fan, a hot air duct and a cooling water tank; the wave-transmitting furnace comprises a furnace body, a furnace cover, a gasket, a first guide plate, a second guide plate, a target bracket and a temperature sensor; the rotating mechanism comprises a motor, a toothed chuck and a motor cover.

[0007] The wave-transparent furnace is installed on the gasket through a limit groove, and the gasket is fixedly connected to the workbench by bolts; the furnace body and the furnace cover are limited by a groove but not fixedly connected, and are lubricated and sealed with high-temperature grease; the furnace cover is fixedly connected to the toothed chuck through a wedge-shaped groove, and the toothed chuck is fixedly connected to the motor shaft through a flange. The motor drives the toothed chuck to rotate, thereby driving the furnace cover to rotate synchronously, and the wave-transparent furnace does not move with the furnace cover; the motor is installed inside the motor cover by welding or bolt fastening; the lower end of the lifting mechanism is fixedly welded to the bottom of the workbench, and the upper end is used to carry and lift the furnace cover, the toothed chuck, the first deflector, the target body bracket, the motor and the motor cover; the hot air pipeline is sequentially connected to the wave-transparent furnace, the air heater, the fan and then back to the wave-transparent furnace to form a closed-loop circuit. The air heater is used to heat the air in the pipeline, and the fan is used to drive the hot air to circulate; the cooling water tank is connected to the fan through a three-way valve to cool the hot exhaust gas; the control unit is used to control the rotation mechanism, the lifting mechanism, the air heater, the fan and the temperature sensor to work.

[0008] According to the present invention, the furnace body is inverted on the furnace cover, and the first deflector is fixed on the furnace cover through a support column. The number of support columns depends on the overall size and is designed to be no less than three; the second deflector is fixed on the top of the furnace body through a positioning pin. The target body bracket is placed on the first deflector and fixed to the first deflector. The temperature sensor is placed on the target body bracket, and the target body is placed on the target body bracket; alternatively, an opening is made on the side or top of the furnace body, and the temperature sensor measures the temperature of the target body through the opening.

[0009] According to the present invention, the whole temperature sensor is spherically coated with a high-temperature-resistant dielectric material, so as to reduce the irregular reflection and refraction of the temperature sensor to microwaves.

[0010] According to the present invention, the diameters of the first deflector and the second deflector are equal to the inner diameter of the wave-transparent furnace, so that the deflectors are embedded in the furnace body. The plate surface is provided with evenly distributed diversion holes for evenly diverting hot air. The aperture of the diversion holes on the side of the first deflector close to the air inlet is slightly smaller than that on the side of the second deflector close to the air outlet, so as to realize a uniform temperature field inside the furnace body.

[0011] According to the present invention, the furnace body is provided with an air inlet between the first deflector and the furnace cover, with a diameter of 3-10 cm; the furnace body is provided with an air outlet between the second deflector and the top of the furnace body, with a diameter of 3-10 cm; the air inlet and the air outlet are distributed on different sides of the furnace body. Hot air enters the furnace body through the air inlet, and forms a uniform hot atmosphere through the diversion of the first deflector and the second deflector in sequence, and leaves the furnace body through the air outlet.

[0012] According to the present invention, the wave-transparent furnace heats the target body by thermal radiation and simulates the heat generated by the friction between the target body and the air during the whole microwave test process to maintain the programmed heating and heat preservation of the target body.

[0013] According to the present utility model, the furnace body, furnace cover, gasket, flow guide plate and target body support are made of one or more heat wave-transmitting ceramic materials such as alumina ceramics, quartz ceramics, silicon nitride ceramics, silicon carbide ceramics and zirconia ceramics by one or more forming methods such as dry pressing, cold isostatic pressing, slip casting, gel casting and hot die casting; preferably, the furnace body, furnace cover, gasket, flow guide plate and target body support are made of quartz ceramics by slip casting process.

[0014] According to the present utility model, the inner diameter of the furnace body is 300 - 700 mm, the height of the furnace body is 250 - 600 mm, and the wall thickness of the furnace body is 15 - 30 mm; if the inner diameter of the furnace body is less than 300 mm, most targets cannot be accommodated, and if the inner diameter of the furnace body is greater than 700 mm, the forming difficulty is too high; if the height of the furnace body is less than 250 mm, the target cannot be accommodated, and if the height of the furnace body is greater than 600 mm, it cannot be formed; if the wall thickness is less than 15 mm, the strength is insufficient, and if the wall thickness is greater than 30 mm, the mass is too large.

[0015] According to the present utility model, the heat wave-transmitting ceramic material has low dielectric constant and dielectric loss, the wave transmission rate is higher than 85%, which does not affect the microwave test accuracy; the long-term working temperature exceeds 600 °C.

[0016] According to the present utility model, the air heater heats air by heating methods such as electric heating, the heating power is 5 - 50 kw, the maximum heating temperature is 500 °C, the heating rate is fast, the cycle stability is good, the temperature can be adjusted, and the temperature control accuracy is ±1 °C. The gas uses air as the source, which is cheap and consistent with the application environment of the target body. Nitrogen or other inert gases can also be used for heating, which is suitable for the occasions where the target body is not applied in air.

[0017] According to the present utility model, the high-temperature resistant grease is molybdenum disulfide grease, fluorine-based high-temperature grease, boron nitride high-temperature grease or silicone high-temperature resistant grease, and the high-temperature resistant grease is filled in the groove of the furnace cover for lubricating and sealing the furnace body.

[0018] According to the present utility model, the workbench is equipped with universal wheels, the tabletop is hollow to cooperate with the lifting of the furnace cover, and polyurethane absorbing wave screens are provided around the workbench to avoid the influence of the workbench and various metal components under the workbench on the microwave test.

[0019] According to the present utility model, the lifting mechanism is an electric push rod, a scissor lift table or a worm gear lift, and the lifting stroke is 500 - 1000 mm to realize the taking and placing of the target body.

[0020] According to the present utility model, the diameter of the hot air pipe is 3 - 10 cm, which is consistent with the air inlet and outlet. If the diameter is less than 3 cm, the hot air flow is insufficient. If the diameter is greater than 10 cm, it will lead to insufficient heating power and difficult processing.

[0021] According to the present utility model, the part of the hot air duct workbench above the tabletop is made of heat-transmitting ceramic material, and the rest is made of metal material; the hot air duct is connected by adhesive socket joint, threaded connection or flange connection; the whole of the hot air duct and the outside of the wave-transmitting furnace is heat-insulated and thermally insulated by asbestos felt, ceramic fiber cotton or wave-transmitting heat-insulating tiles.

[0022] According to the present utility model, at the air outlet of the cooling water tank, quick desiccants such as anhydrous calcium sulfate, anhydrous calcium chloride, activated alumina, etc. are used to adsorb water vapor; preferably, anhydrous calcium sulfate is made into a pipe cover and buckled on the air outlet of the cooling water tank.

[0023] The test method of a microwave anechoic chamber target heating test device of the present utility model is as follows:

[0024] The first step: Before work, check the pipeline and confirm that the pipeline is well sealed. Close the stop valve of the cooling water tank. The lifting mechanism drives the furnace cover to descend as a whole. Place the target on the target support. The lifting mechanism rises until the furnace cover is 1-3 mm away from the furnace body. Fill the groove of the furnace cover with high-temperature resistant grease for lubrication and sealing;

[0025] The second step: Set the target temperature of the air heater and start heating the air of the system. At the same time, start the fan to drive the hot air in the system to circulate. The target is heated by the thermal radiation of the hot air and thus the temperature rises. The temperature sensor monitors the temperature of the target in real time;

[0026] The third step: When the target rises to the target temperature, start the microwave anechoic chamber test program, and control the rotating mechanism to rotate the target at a speed of 0.1-10 rad / min by 0-360°;

[0027] The fourth step: After the test is over, turn off the air heater to stop heating, open the stop valve of the cooling water tank, and the fan continuously blows the hot air into the water tank for cooling. When the temperature of the wave-transmitting furnace drops to room temperature, the lifting mechanism descends, take out the target, and clean the furnace body.

[0028] During the test, the target temperature can be continuously changed for microwave anechoic chamber test.

[0029] Compared with the prior art, the beneficial effects of the present utility model include but are not limited to the following aspects:

[0030] 1) By using a microwave anechoic chamber target gas heating test device of the present utility model, uniform heating and precise temperature control of the target can be realized during the microwave test, and the electromagnetic characteristics of the target can be tested under high-temperature conditions.

[0031] 2) By using the gas heating test device for the target in the microwave anechoic chamber of the present utility model, hot air heating is adopted, which is cheap, easily available and pollution-free. It can maintain the programmed heating of the target throughout the microwave test, and can adjust the heating temperature online, so as to realize the full-cycle microwave test of the target in the high-heat state and obtain the coupling relationship between the temperature and electromagnetic characteristics of the target.

[0032] 3) By using the gas heating device for the target in the microwave anechoic chamber of the present utility model, the heating device is far away from the furnace body, and the heat source will not interfere with the test process. Using a wave-transparent furnace and a polyurethane absorbing screen ensures that the target rotation system does not affect the measurement accuracy, and the measurement results are reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The overall structural schematic diagram of a gas heating test device for the target in the microwave anechoic chamber of the present utility model is shown;

[0034] Figure 2 The working schematic diagram of the lifting device of a gas heating test device for the target in the microwave anechoic chamber of the present utility model is shown;

[0035] Figure 3 The structural schematic diagram of the wedge-shaped groove at the bottom of the furnace cover of a gas heating test device for the target in the microwave anechoic chamber of the present utility model is shown;

[0036] Figure 4 The schematic diagram of the wave-transparent furnace and the rotating mechanism of a gas heating test device for the target in the microwave anechoic chamber of the present utility model is shown.

[0037] In the figure, 1. Wave-transparent furnace; 101. Second deflector; 102. Furnace body; 103. Air inlet; 104. Target support; 105. Furnace cover; 1051. Wedge-shaped groove; 106. First deflector; 107. Gasket; 108. Air outlet; 109. Temperature sensor; 2. Target; 3. Workbench; 301. Universal wheel; 4. Lifting mechanism; 5. Rotating mechanism; 501. Toothed chuck; 502. Motor cover; 503. Motor; 6. Absorbing screen; 7. Control unit; 8. Hot air pipeline; 9. Air heater; 10. Fan; 11. Cooling water tank; 12. Pipeline cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The following further describes the present utility model in detail with specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model.

[0039] The present utility model provides a gas heating test device for the target in the microwave anechoic chamber, as Figure 1 and Figure 2As shown, it includes a target body 2, a wave-transmitting furnace 1, a workbench 3, a rotating mechanism 5, a lifting mechanism 4, a control unit 7, an air heater 9, a fan 10, a hot air duct 8 and a cooling water tank 11; the wave-transmitting furnace 1 includes a furnace body 102, a furnace cover 105, a gasket 107, a guide plate 1 106, a guide plate 2 101, a target body bracket 104 and a temperature sensor 109; the rotating mechanism 5 includes a motor 503, a toothed chuck 501 and a motor cover 502.

[0040] The wave-transmitting furnace 1 is installed on the gasket 107 through the limiting groove, and the gasket 107 is fixedly connected to the workbench 3 by bolts; the furnace body 102 and the furnace cover 105 are limited by the groove but not fixedly connected, and are lubricated and sealed by high-temperature resistant grease; the furnace cover 105 is fixedly connected to the toothed chuck through the wedge groove 1051, such as Figure 3 As shown, the toothed chuck 501 is fixedly connected to the motor shaft through a flange, and the motor 503 drives the toothed chuck 501 to rotate, thereby driving the furnace cover 105 to rotate synchronously, and the wave-transmitting furnace 1 does not move with the furnace cover 105. Figure 4 As shown; the motor 503 is installed inside the motor cover 502 by welding or bolting; the lower end of the lifting mechanism 4 is fixed to the bottom of the workbench 3 by welding, and the upper end is used to carry and lift the furnace cover 105, the toothed chuck 501, the guide plate 106, the target body bracket 104, the motor 503 and the motor cover 502; the hot air duct 8 is connected to the wave furnace 1, the air heater 9, the fan 10 in sequence and finally connected back to the wave furnace 1 to form a closed loop, the air heater 9 is used to heat the air in the duct 8, and the fan 10 is used to drive the hot air to circulate; the cooling water tank 11 is connected to the fan 10 through a three-way valve for cooling the hot exhaust gas; the control unit 7 is used to control the operation of the rotating mechanism 5, the lifting mechanism 4, the air heater 9, the fan 503 and the temperature sensor 109.

[0041] The furnace body 102 of the utility model is inverted on the furnace cover 105, and the guide plate 1 106 is fixed on the furnace cover 105 through support columns. The number of support columns depends on the overall size and is in principle not less than three to ensure the stability of the guide plate; the guide plate 2 101 is fixed to the top of the furnace body 102 through positioning pins. The positioning pins are fixed by one-piece molding or grooves, and the number of positioning pins is not less than three.

[0042] The target body bracket 104 of the utility model is placed on the guide plate 106 and fixed to the guide plate 106, the temperature sensor 109 is placed on the target body bracket 104, and the target body 2 is placed on the target body bracket 104, so that the temperature sensor 109 can monitor the temperature of the target body 2; alternatively, a hole is opened on the side or top of the furnace body 102, and the temperature sensor 109 measures the temperature of the target body 2 through the hole.

[0043] The temperature sensor 109 of the present utility model is integrally coated in a spherical shape with a high-temperature resistant dielectric material, thereby reducing the irregular reflection and refraction of microwaves by the temperature sensor 109 and avoiding affecting the microwave test accuracy.

[0044] The diameters of the first flow guide plate 106 and the second flow guide plate 101 of the present utility model are equal to or slightly smaller than the inner diameter of the wave-transparent furnace 1, so that the flow guide plates are embedded in the furnace body 102. The plate surface is provided with uniformly distributed flow guide holes for uniformly guiding hot air. The diameters of the flow guide holes on the side of the first flow guide plate 106 close to the air inlet 103 and on the side of the second flow guide plate 101 close to the air outlet 108 are slightly smaller, thereby realizing uniform temperature distribution inside the furnace body 102.

[0045] The furnace body 102 of the present utility model is provided with an air inlet 103 with a diameter of 3 - 10 cm between the first flow guide plate 106 and the furnace cover 105; the furnace body 102 is provided with an air outlet 108 with a diameter of 3 - 10 cm between the second flow guide plate 101 and the top of the furnace body 102; the air inlet 103 and the air outlet 108 are distributed on opposite sides of the furnace body 102. Hot air enters the furnace body 102 through the air inlet 103, and forms a uniform hot atmosphere through the guiding action of the first flow guide plate 106 and the second flow guide plate 101 in sequence, and then leaves the furnace body 102 through the air outlet 108.

[0046] The wave-transparent furnace 1 of the present utility model heats the target body 2 by thermal radiation and simulates the frictional heat generation between the target body 2 and air during the entire microwave test process to maintain the programmed heating and heat preservation of the target body 2.

[0047] The furnace body 102, furnace cover 105, gasket 107, first flow guide plate 106, second flow guide plate 101 and target body support 104 of the present utility model are made of one or more heat wave-transparent ceramic materials such as alumina ceramics, quartz ceramics, silicon nitride ceramics, silicon carbide ceramics and zirconia ceramics by using one or more forming methods such as dry pressing, cold isostatic pressing, slip casting, gel casting and hot die casting; preferably, the furnace body 102, furnace cover 105, gasket 107, first flow guide plate 106, second flow guide plate 101 and target body support 104 are made of quartz ceramics by using the slip casting process.

[0048] The inner diameter of the furnace body 102 of the present utility model is 300 - 700 mm, the height of the furnace body 102 is 250 - 600 mm, and the wall thickness of the furnace body 102 is 15 - 30 mm; if the inner diameter of the furnace body 102 is less than 300 mm, most of the target bodies 2 cannot be accommodated, and if the inner diameter of the furnace body 102 is greater than 700 mm, the forming difficulty is too high; if the height of the furnace body 102 is less than 250 mm, it is not enough to accommodate the target body 2, and if the height of the furnace body 102 is greater than 600 mm, it cannot be formed; if the wall thickness is less than 15 mm, the strength is insufficient, and if the wall thickness is greater than 30 mm, the mass is too large. Preferably, the inner diameter of the wave - transmitting furnace 1 is 500 mm, the furnace height is 500 mm, and the wall thickness is 20 mm, meeting the test requirements of the vast majority of target bodies 2.

[0049] The dielectric constant and dielectric loss of the thermal wave - transmitting ceramic material of the present utility model are low, the wave - transmitting rate is higher than 85%, and it does not affect the microwave test accuracy; the long - term working temperature exceeds 600 °C.

[0050] The air heater 9 of the present utility model heats air by heating methods such as electric heating, with a heating power of 5 - 50 kw, a maximum heating temperature of 500 °C, a fast heating rate, good cycle stability, can adjust the temperature, and the temperature control accuracy is ±1 °C.

[0051] The high - temperature resistant grease of the present utility model is molybdenum disulfide grease, fluorine - based high - temperature grease, boron nitride high - temperature grease or silicone high - temperature resistant grease. The high - temperature resistant grease is filled in the groove of the furnace cover 105 for lubricating and sealing the furnace body 102. Preferably, low - speed molybdenum disulfide grease is used for lubricating and sealing.

[0052] The workbench 3 of the present utility model is equipped with universal wheels 301, the tabletop is hollow to cooperate with the lifting of the furnace cover 105, and polyurethane wave - absorbing screens 6 are arranged around the workbench 3. The height of the wave - absorbing screens 6 is the same as the height of the workbench 3, avoiding the influence of the workbench 3 and various metal components under the workbench 3 on the microwave test.

[0053] The lifting mechanism 4 of the present utility model is an electric push rod, a scissor - type lifting platform or a worm elevator, with a lifting stroke of 500 - 1000 mm to realize the picking and placing of the target body 2; preferably, an electric push rod is used for lifting.

[0054] The diameter of the hot - air pipeline 8 of the present utility model is 3 - 10 cm, which is consistent with the diameters of the air inlet 103 and the air outlet 108. If the diameter is less than 3 cm, the hot - air flow is insufficient, and if the diameter is greater than 10 cm, it will lead to insufficient heating power and difficult processing; preferably, the diameter of the system pipeline is 6 cm.

[0055] For the present utility model, the part of the hot air duct 8 above the workbench 3 tabletop is made of heat-transmitting ceramic material, and the rest is made of metal material; the hot air duct 8 uses adhesive socket connection, threaded connection or flange connection; the whole exterior of the hot air duct 8 and the wave-transparent furnace 1 is heat-insulated and thermally insulated by asbestos felt, ceramic fiber cotton or wave-transparent heat-insulating tiles.

[0056] At the air outlet 108 of the cooling water tank 11 of the present utility model, quick desiccants such as anhydrous calcium sulfate, anhydrous calcium chloride, activated alumina, etc. are used to adsorb water vapor; preferably, anhydrous calcium sulfate is made into a pipe cover 12 and buckled on the air outlet 108 of the cooling water tank.

[0057] For the present utility model, using the above-mentioned microwave anechoic chamber target body gas heating system, the test method steps are as follows:

[0058] Step 1: Before working, check the pipeline and confirm that the pipeline is hermetically sealed. Close the cut-off valve of the cooling water tank. The lifting mechanism 4 drives the furnace cover 105 to descend as a whole. Place the target body 2 on the target body support 104. The lifting mechanism 4 rises to a position where the distance between the furnace cover 105 and the furnace body 102 is 1 - 3 mm, and fill the groove of the furnace cover 105 with high-temperature grease for lubricating and sealing.

[0059] Step 2: Set the target temperature of the air heater 9 and start heating the air of the system. At the same time, start the fan 10 to drive the hot air of the system to circulate. The target body 2 is heated by the hot air thermal radiation and thus heats up. The temperature sensor 109 monitors the temperature of the target body 2 in real time.

[0060] Step 3: When the target body 2 heats up to the target temperature, start the microwave anechoic chamber test program, and control the rotating mechanism 5 to rotate the target body 2 at a speed of 0.1 - 10 rad / min by 0 - 360°.

[0061] Step 4: After the test is completed, turn off the air heater 9 to stop heating, open the cut-off valve of the cooling water tank 11, and the fan 10 continuously purges the hot air into the water tank 11 for cooling. When the temperature of the wave-transparent furnace 1 drops to room temperature, the lifting mechanism 4 descends, take out the target body 2, and clean the furnace body 102.

[0062] During the test, continuously change the target temperature for microwave anechoic chamber testing. Specific embodiments

[0064] 1) Preparation before testing: Before working, check the pipeline and confirm that the pipeline is hermetically sealed. Close the cut-off valve of the cooling water tank 11 and open the valve of the hot air duct 8.

[0065] 2) System startup: Use the control unit to set the heating temperature gradients of the air heater 8 to room temperature, 80 °C, 150 °C, 300 °C, 500 °C in sequence; set the rotation angle of the rotating mechanism 5 to 0 - 180 °, with a gradient interval of 10 °; set the parameters of the radar test instrument.

[0066] 3) Use the control unit 7 to start the electric push rod to lower the furnace cover 105, place the target body 2 on the target body support 104, and start the electric push rod to raise the furnace cover 105 to the closed state;

[0067] 4) Start the air heater 9 and the fan 10 to circulate and heat the air inside the system, and the temperature sensor 109 monitors the temperature in real time;

[0068] 5) Wait until the temperature rises to the set temperature one, maintain the temperature, start the radar test program, and record the electromagnetic waves reflected by the target body 2;

[0069] 6) Use the control unit 7 to control the rotation mechanism 5 to rotate, record the data every time it rotates by an angle until it rotates to the termination angle;

[0070] 7) The air heater 9 continues to heat up to temperature two and maintains it, and repeat step 6;

[0071] 8) Repeat step 7 until the test of the termination temperature is completed;

[0072] 9) Turn off the air heater 9 to stop heating, open the cut-off valve of the cooling water tank 11, the fan 10 continuously blows the hot air in the pipeline into the cooling water tank 11 for cooling. Wait until the system cools down to room temperature, turn off the fan 10, start the electric push rod to lower the furnace cover 105 to remove the target body 2, and clean the high-temperature resistant grease in the groove of the furnace cover 105 to end the test.

[0073] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A microwave darkroom target gas heating test device, characterized in that: It includes a target body, a wave-transmitting furnace, a workbench, a rotating mechanism, a lifting mechanism, a control unit, an air heater, a fan, a hot air duct and a cooling water tank; the wave-transmitting furnace includes a furnace body, a furnace cover, a gasket, a guide plate 1, a guide plate 2, a target body bracket and a temperature sensor; the rotating mechanism includes a motor, a toothed chuck and a motor cover; the wave-transmitting furnace is installed on the gasket through a limiting groove, and the gasket and the workbench are fixed by bolts; the furnace body and the furnace cover are limited by the groove but not fixed, and are lubricated and sealed by high-temperature resistant grease; the furnace cover is fixed to the toothed chuck through a wedge groove, and the toothed chuck is fixed to the motor shaft through a flange, the motor drives the toothed chuck to rotate, and then drives the furnace cover to rotate synchronously, and the wave-transmitting furnace does not move with the furnace cover; the motor is installed inside the motor cover by welding or bolting; the lower end of the lifting mechanism is fixed to the bottom of the workbench by welding, and the upper end Used to carry and lift the furnace cover, toothed chuck, guide plate 1, target body bracket, motor and motor cover; the hot air duct is connected to the wave-through furnace, air heater, fan in sequence and finally connected back to the wave-through furnace to form a closed loop, the air heater is used to heat the air in the duct, and the fan is used to drive the hot air to circulate; the cooling water tank is connected to the fan through a three-way valve to cool the hot exhaust gas; the control unit is used to control the operation of the rotating mechanism, lifting mechanism, air heater, fan and temperature sensor; the furnace body is inverted on the furnace cover, and the guide plate 1 is fixed on the furnace cover by support columns. The number of support columns depends on the overall size and is designed to be no less than three; the guide plate 2 is fixed to the top of the furnace body by locating pins, the target body bracket is placed on the guide plate 1 and fixed to the guide plate 1, the temperature sensor is placed on the target body bracket, and the target is placed on the target body bracket.

2. A microwave darkroom target gas heating test device according to claim 1, characterized in that: A hole is opened on the side or top of the furnace body, and the temperature sensor measures the temperature of the target body through the hole.

3. The microwave darkroom target gas heating test device according to claim 1, characterized in that: The temperature sensor is entirely spherically coated with a high temperature resistant dielectric material, thereby reducing irregular reflection and refraction of microwaves by the temperature sensor.

4. The microwave darkroom target gas heating test device according to claim 1, characterized in that: The air heater heats the air by electric heating, with a heating power of 5-50kw and a maximum heating temperature of 500°C.

5. The microwave darkroom target gas heating test device according to claim 1, characterized in that: The high temperature resistant grease is molybdenum disulfide grease, fluorine high temperature grease, boron nitride high temperature grease or silicone high temperature resistant grease. The high temperature resistant grease is filled in the groove of the furnace cover for lubrication and sealing of the furnace body; the workbench has universal wheels, the table top is hollow to cooperate with the lifting of the furnace cover, and polyurethane absorbing screens are arranged around the workbench to prevent the workbench and the various metal parts under the workbench from affecting the microwave test; the lifting mechanism is an electric push rod, a scissors-type lifting platform or a worm lift, and the lifting stroke is 500-1000mm to achieve the target body picking and placing; anhydrous calcium sulfate, anhydrous calcium chloride or activated alumina is used at the air outlet of the cooling water tank to absorb water vapor.

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