Rotary natural environment accelerated light aging test device and test method

Abstract

The present invention provides a turntable-type natural environment accelerated light aging test device and test method. The test device includes a solar tracking mechanism, a power supply system, a temperature monitoring system, an ultraviolet light reflection system and a sample target plate assembly disposed on the solar tracking mechanism's support frame. The ultraviolet light reflection system includes multiple independent and spaced reflector assemblies. The test method includes the following steps: controlling the solar tracking mechanism to rotate according to the solar azimuth angle, controlling the reflectors of the reflector assembly to pitch according to the solar altitude angle to ensure that reflected light irradiates the sample test area; and controlling one or more reflectors to flip to a horizontal or vertical state when the temperature on the sample exceeds a preset upper temperature limit. The present invention can achieve arbitrary adjustment of the accelerated aging rate and also implement light aging testing with constant radiation intensity.

Description

Technical Field

[0001] The present invention belongs to the technical field of natural environment accelerated testing, and in particular relates to a turntable natural environment accelerated light aging testing device and a testing method. Background Art

[0002] Coatings, plastics, and other polymer materials exposed to sunlight often experience discoloration, powdering, blistering, cracking, and shedding over long periods of use, severely impacting the product's mechanical properties, protective performance, and appearance. Therefore, during the development of coatings, plastics, and other materials, it's necessary to simulate natural usage conditions—that is, to conduct light aging tests to assess and provide a basis for evaluation. To rapidly assess material performance, artificially accelerated light aging is often used in light aging tests of new materials.

[0003] Currently, accelerated photoaging testing methods primarily fall into two categories: laboratory-based accelerated testing methods such as carbon arc lamp irradiation, fluorescent ultraviolet lamp irradiation, xenon arc lamp irradiation, and metal halide lamp irradiation, and natural light focused irradiation methods utilizing sunlight. Natural light focused irradiation is a naturally accelerated photoaging testing method that primarily utilizes a solar tracking and concentrating device to increase the amount of solar radiation on the exposed surface of the test sample during the test. For example, the highly accelerated aging testing apparatus for polymer materials disclosed in existing document CN113155715B includes a UV reflection system, a sample temperature control system, a solar tracking system, and a multi-environmental factor coordinated control system. The UV reflection system's main structure is a spherical concave surface, primarily consisting of a concave frame and a mounting bracket for securing the concave frame. The concave frame is equipped with multiple reflectors. The solar tracking system includes a vertical rotation mechanism, a horizontal rotation mechanism, and a base. The horizontal rotation mechanism is mounted on the base, and the vertical rotation mechanism is connected to the UV reflection system. Through the vertical and horizontal rotation mechanisms, the UV reflection system's reflective surface is always perpendicular to direct sunlight. In addition, the Atlas Weathering Test Group in the United States has developed a new type of outdoor accelerated testing equipment - the UV accelerated climate system. This system uses Fresnel reflectors to focus the ultraviolet part of natural light, and uses a sun tracking system to always ensure that the ultraviolet light is reflected and focused on the sample. The intensity after focusing is 50 to 100 times that of natural light.

[0004] However, these accelerated aging test devices are typically only suitable for conducting accelerated light aging tests on lightweight standard or flat samples. They are incapable of conducting accelerated light aging tests on polyhedral components or even on large samples (typically weighing at least 100 kg). More importantly, a major technical difficulty with existing accelerated aging test devices is the inability to stably and effectively conduct accelerated light aging tests on curved and cylindrical samples. Summary of the Invention

[0005] In view of the problems existing in the background technology, the present invention aims to provide a turntable-type natural environment accelerated light aging test device and test method.

[0006] The object of the present invention is achieved by adopting the following technical solutions.

[0007] A turntable-type natural environment accelerated light aging test device includes a solar tracking mechanism, a power supply system, a temperature monitoring system, and an ultraviolet light reflection system and a sample target plate assembly arranged on the supporting top frame of the solar tracking mechanism. The device is characterized in that the ultraviolet light reflection system includes a plurality of independent and spaced reflector assemblies, each reflector assembly includes a rotating support, a reflector support plate is installed on the top plate of the rotating support, the reflector support plate is connected to the reflector, and the reflector can be tilted to a suitable angle, and the mirror surfaces of some or all reflectors can jointly form a reflecting sphere that reflects ultraviolet light to the test area of ​​the sample target plate.

[0008] In order to facilitate accurate and rapid adjustment of the irradiation temperature of the sample test area, the reflector can be flipped to a horizontal state and / or a vertical state. The reflector assembly is mounted on a universal mechanism (such as a universal ball head or a three-dimensional universal joint) to facilitate adjustment of the inclination angle of the reflector on the reflector assembly.

[0009] As one of the preferred solutions, the top of the reflector support plate is hingedly connected to the back of the reflector through a movable rod, and the back of the reflector is also connected to the top plate through a telescope. When the telescope is extended or shortened, the reflector adaptively pitches and flips with the movement of the telescope.

[0010] As a second preferred solution, a horizontally arranged motor is provided on the reflector support plate, the output shaft of the motor is connected to a movable rod, the other end of the movable rod is fixedly connected to the back of the reflector, and the back of the reflector is also connected to the top plate through a telescopic rod; when the motor rotates, it drives the movable rod and the reflector to pitch and flip synchronously.

[0011] Furthermore, the reflector assembly includes multiple rows of reflector assemblies arranged in an array, the reflectors in the same row of reflector assemblies are arranged at the same height, and the reflector assemblies in different rows are arranged in a gradient manner, with the reflectors in the back row being higher than the reflectors in the front row.

[0012] Furthermore, the sample target plate assembly includes a column, a sample is installed on the top of the column, the power supply system adopts a solar power supply system, the solar panel of the solar power supply system is located between the sample target plate assembly and the ultraviolet light reflection system, and the highest point of the solar panel is lower than all ultraviolet light reflection paths.

[0013] In the present invention, the sun tracking mechanism, the temperature monitoring system, and the drive system of the reflector assembly are respectively connected to a controller. The controller includes a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, it can at least perform the following steps / functions:

[0014] Read the satellite time, and calculate the real-time azimuth and altitude of the sun according to the set longitude and latitude data;

[0015] Control the sun tracking mechanism to rotate according to the sun's azimuth angle to ensure that the supporting frame always rotates with the sun's azimuth; control the reflector of the reflector assembly to pitch according to the sun's altitude angle to ensure that the reflected light of the reflector always illuminates the test area of ​​the sample;

[0016] Control the start and stop of the air cooling fan installed at the target plate to cool the sample during the test;

[0017] The control device starts and stops the spray water pump, sprays the sample according to the test requirements during the test, and strengthens the comprehensive effects of dry-wet alternation and light aging;

[0018] Read the data fed back by the solar ultraviolet radiation sensor and the sample temperature sensor at the sample target plate, and adjust and control the test state according to the test parameters.

[0019] A test method using the aforementioned turntable-type natural environment accelerated light aging test device comprises the following steps:

[0020] Step 1, install the sample;

[0021] Step 2: Adjust the reflectors of all reflector assemblies to a suitable inclination angle until the reflected light from all reflectors can illuminate the test area of ​​the sample;

[0022] Step 3: Control the sun tracking mechanism to rotate according to the sun's azimuth angle to ensure that the supporting frame always rotates with the sun's azimuth; control the reflector of the reflector assembly to pitch according to the sun's altitude angle to ensure that the reflected light of the reflector illuminates the test area of ​​the sample;

[0023] Step 4: When the intensity of solar ultraviolet radiation or the temperature on the sample is detected to exceed a preset upper limit, one or more reflectors are controlled to flip to a horizontal state or a vertical state;

[0024] Step 5: When the solar ultraviolet radiation intensity or temperature on the sample is detected to be lower than the preset temperature lower limit, one or more reflectors are controlled to flip to the state of the reflectors in step 3;

[0025] Step 6: Repeat steps 4 and 5 to ensure that the solar ultraviolet radiation intensity or temperature on the sample is always within the preset range.

[0026] A test method using the aforementioned turntable-type natural environment accelerated light aging test device comprises the following steps:

[0027] Step 11, installing a columnar sample;

[0028] Step 12, adjusting the reflectors of all reflector assemblies to appropriate inclination angles until the reflected light from all reflectors can illuminate the test area of ​​the sample;

[0029] Step 13: Control the solar tracking mechanism to rotate in real time according to the solar azimuth angle. Simultaneously, control the mirrors of the first row of mirror assemblies to pitch and rotate according to the solar high angle until the reflected light from all the mirrors in the first row illuminates the first test area of ​​the columnar sample. Control the mirrors of the second row of mirror assemblies to pitch and rotate according to the solar high angle until the reflected light from all the mirrors in the second row illuminates the second test area of ​​the columnar sample. Control the mirrors of the Nth (N=3, 4, 5, ...) row of mirror assemblies to pitch and rotate according to the solar high angle until the reflected light from all the mirrors in the Nth row illuminates the Nth test area of ​​the columnar sample.

[0030] Step 14: When it is monitored that the temperature of a certain test area on the columnar sample exceeds the preset temperature upper limit, one or more reflectors corresponding to the test area are controlled to flip to a horizontal state / vertical state; when it is monitored that the temperature of the test area on the sample is lower than the preset temperature lower limit, one or more reflectors in the test area are controlled to flip to an effective reflection state; this step is repeatedly performed to ensure that the temperature of all test areas on the columnar sample is always within the preset temperature range.

[0031] In order to smoothly and effectively carry out accelerated aging tests on heavy cylindrical samples, the following steps are used to install the cylindrical samples:

[0032] Step 110: First, install the cylindrical base (i.e., the hollow column) on the supporting frame, and then insert the cylindrical support into the cylindrical base. At this time, the bottom wall of the top plate of the cylindrical support just touches the top edge of the cylindrical base, and the bottom end of the cylindrical support just touches the bottom wall of the cylindrical base.

[0033] Step 111: Install and adjust the tightening bolts on the side wall of the cylindrical cylinder seat to keep the cylindrical support body in a vertical state;

[0034] Step 112, pouring sand into the cylindrical base through the through hole on the top plate until the sand fills the cavity of the cylindrical base;

[0035] Step 113: fix the bottom plate of the columnar sample on the top plate of the columnar support.

[0036] Furthermore, a plurality of rolling supports are arranged under the load-bearing top frame. The annular structure formed by all the rolling supports is located directly below the movement trajectory of the columnar sample. The rolling supports include vertical poles installed on a concrete foundation, and bearings are arranged horizontally on the top of the vertical poles. When the solar tracking mechanism is running, the top of the bearing is always in contact with the bottom wall of the load-bearing top frame.

[0037] Beneficial effects:

[0038] 1. The present invention can not only achieve efficient enhancement of the solar radiation effect, but also achieve arbitrary adjustment of the accelerated aging rate by 1 to 100 times, and can also realize light aging test with constant radiation intensity;

[0039] 2. The test device has a low center of gravity and is wind-resistant up to level 10. It has zero carbon emissions and is particularly suitable for installation in remote areas with extreme climates, making sample installation very convenient.

[0040] 3. It is convenient to accurately and quickly adjust the irradiation temperature of the sample test area, and can complete the irradiation adjustment of any test area on the sample within three seconds;

[0041] 4. It is not only suitable for accelerated light aging tests on small samples, but also for large samples. It can also stably and effectively perform accelerated light aging tests on curved samples and cylindrical samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 Schematic diagram of the turntable-type natural environment accelerated light aging test device in Example 1;

[0043] Figure 2 yes Figure 1 A top view of

[0044] Figure 3 yes Figure 1 The main view of

[0045] Figure 4 yes Figure 1 lateral view of;

[0046] Figure 5 This is a schematic diagram of the reflector assembly in Example 1. Figure 1 ;

[0047] Figure 6 This is a schematic diagram of the reflector assembly in Example 1. Figure 2 ;

[0048] Figure 7 Schematic diagram of the turntable-type natural environment accelerated light aging test device in Example 2;

[0049] Figure 8 yes Figure 7lateral view of;

[0050] Figure 9 Schematic diagram of the external structure of the sample target plate assembly in Example 2;

[0051] Figure 10 2 is a schematic diagram of the cross-sectional structure of the sample target plate assembly in Example 2;

[0052] Figure 11 Schematic diagram of the reflector assembly in Example 3. DETAILED DESCRIPTION

[0053] The present invention is further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described this time are only used to explain the present invention and are not used to limit the present invention. Example 1

[0054] like Figures 1 to 3 As shown, a turntable-type natural environment accelerated light aging test device includes a solar tracking mechanism, a power supply system, a temperature monitoring system, and a UV reflection system and sample target plate assembly 1 mounted on the solar tracking mechanism's supporting frame 3. The operating principle and method of the solar tracking mechanism are prior art and will not be described in detail here. Specifically, the solar tracking system described in CN113155715B can be adopted. The solar tracking mechanism's rotating ring 5 is fixedly connected to the supporting frame 3.

[0055] In this embodiment, the ultraviolet light reflection system includes a plurality of independent and spaced-apart reflector assemblies 2, each reflector assembly 2 including a rotating support 20, a reflector support plate 21 mounted on the top plate 24 of the rotating support 20, the reflector support plate 21 being connected to the reflector 23, the reflector 23 being able to be tilted and flipped to a suitable angle, and the mirror surfaces of some reflectors 23 (here referring to some reflectors 23 being in an effective reflection state, for example, when X reflectors out of a total of 100 reflectors are in an effective reflection state, these X reflectors are referred to as partial reflectors) or all reflectors 23 (here referring to all reflectors 23 being in an effective reflection state) can jointly form a reflecting spherical surface that reflects ultraviolet light to the test area of ​​the sample target plate.

[0056] The rotating support 20 directly drives the reflector 23 to rotate to a suitable angle, and its ultimate function is to cooperate with other components to achieve precise and rapid adjustment of the irradiation temperature of the sample test area. The rotating support 20 can adopt an existing rotary structure or a worm gear rotary structure. For example, the rotating support 20 includes a bottom plate mounted on the supporting top frame 3, a worm gear box 28 is provided on the bottom plate, a top plate 24 is provided above the worm gear box 28, a motor 29 (servo motor) is mounted on the upper wall of the top plate 24, a worm gear transmission mechanism is provided in the worm gear box 28, the worm gear transmission mechanism is connected to the output end of the motor 29, and the top plate 24 is connected to the rotating ring gear of the worm gear transmission mechanism. When the motor is running, it drives the worm gear transmission mechanism to operate, thereby driving the rotating ring gear and the top plate 24 to rotate synchronously.

[0057] In this embodiment, each reflector 23 can be flipped to a horizontal state and a vertical state. Specifically, a horizontally arranged motor 26 is provided on the reflector support plate 21. The output shaft of the motor 26 is connected to the movable rod 22. The other end of the movable rod 22 is fixedly connected to the back of the reflector 23. The back of the reflector 23 is also connected to the top plate 24 via a telescopic rod 27. When the motor 26 rotates, it drives the movable rod 22 and the reflector 23 to pitch and flip synchronously (when the motor 26 rotates clockwise to the extreme position, it drives the reflector 23 to flip to the vertical state; when the motor 26 rotates counterclockwise to the extreme position, it drives the reflector 23 to flip to the horizontal state).

[0058] In this embodiment, the reflector assembly 2 includes multiple rows of reflector assemblies 2 arranged in an array. The reflectors 23 of the reflector assemblies 2 in the same row are arranged at the same height, and the reflector assemblies 2 in different rows are arranged in a gradient manner, and the reflectors 23 in the back row are higher than the reflectors 23 in the front row. Seven rows of reflectors 23 are schematically shown in the figure.

[0059] In this embodiment, the sample target plate assembly 1 includes a column 10, a sample 11 is installed on the top of the column 10, and the power supply system adopts a solar power supply system. The solar panel 4 of the solar power supply system is located between the sample target plate assembly 1 and the ultraviolet light reflection system, and the highest point of the solar panel 4 is lower than all ultraviolet light reflection paths.

[0060] In this embodiment, the sun tracking mechanism, the temperature monitoring system, and the drive system of the reflector assembly 2 are respectively connected to a controller. The controller includes a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, the following steps / functions are implemented:

[0061] Read the satellite time, and calculate the real-time azimuth and altitude of the sun according to the set longitude and latitude data;

[0062] Control the sun tracking mechanism to rotate in real time according to the sun's azimuth angle, ensuring that the supporting frame 3 always rotates with the sun's azimuth; control the reflector 23 of the reflector assembly 2 to pitch and rotate in real time according to the sun's altitude angle, ensuring that the reflected light of the reflector 23 irradiates the test area of ​​the sample;

[0063] Control the start and stop of the air cooling fan installed at the sample target plate to cool the sample during the test;

[0064] The control device starts and stops the spray water pump, sprays the sample according to the test requirements during the test, and strengthens the comprehensive effects of dry-wet alternation and light aging;

[0065] Read the data fed back by the solar ultraviolet radiation sensor and the sample temperature sensor at the sample target plate, and adjust and control the test state according to the test parameters.

[0066] This part of the control program is written by a technician in this field or a technician in the computer field. Its core is to ensure that: any one of the reflectors 23 can reflect ultraviolet light to the test area of ​​the sample target plate when it is in an effective reflection state; any one of the reflectors 23 can pitch and rotate horizontally according to the target angle and azimuth, and the minimum angle of a single horizontal rotation can be set to 1°, the minimum angle of a single pitch rotation can be set to 2°, the maximum angle of a single horizontal rotation can be set to 15°, and the maximum angle of a single pitch rotation can be set to 45°, to ensure that the reflected light of the reflector 23 is irradiated to the test area of ​​the sample 11.

[0067] The test method of the rotary table natural environment accelerated light aging test device in this embodiment is used to carry out an accelerated light aging test on small samples. The steps include:

[0068] Step 1: Install the sample 11 on the top of the column 10;

[0069] Step 2: adjusting the reflectors 23 of all reflector assemblies 2 to a suitable inclination angle until the reflected light from all reflectors 23 can illuminate the test area of ​​the sample;

[0070] Step 3: Control the sun tracking mechanism to rotate in real time according to the sun's azimuth angle to ensure that the supporting frame 3 always rotates with the sun's azimuth; control the reflector 23 of the reflector assembly 2 to pitch in real time according to the sun's altitude angle to ensure that the reflected light of the reflector is irradiated to the test area of ​​the sample; the angle of each horizontal rotation can be controlled to 1°, and the angle of each pitch rotation can be controlled to 2°;

[0071] Step 4: When the temperature of the sample 11 is detected to be above a preset upper temperature limit, one or more reflectors 23 are controlled to flip to a horizontal or vertical state (this action process can be completed within 1-3 seconds);

[0072] Step 5: When the temperature of the sample 11 is detected to be lower than the preset lower limit, one or more reflectors 23 are controlled to flip to the state of the reflectors 23 in step 3;

[0073] Step 6: Repeat steps 4 and 5 to ensure that the temperature of the sample 11 is always within the preset temperature range.

[0074] In step 4, if it is monitored that the temperature on the sample 11 rises too fast, one or more reflectors 23 can be controlled to flip to a horizontal state or a vertical state until the temperature rise rate is within a reasonable range.

[0075] By adopting the scheme in this embodiment, efficient enhancement of the solar radiation light effect can be achieved, and the accelerated aging rate can be arbitrarily adjusted from 1 to 100 times, and a light aging test with constant radiation intensity can be achieved; the temperature rise can also be accurately controlled at 1°C / 5s, and the temperature on sample 11 can be accurately stabilized within the range of ±3°C. Example 2

[0076] A turntable-type natural environment accelerated light aging test device, referring to Example 1, the main difference between it and Example 1 is that: the column 10 adopts a cylindrical cylinder seat 31 (a column with a hollow structure), a discharge short tube with a valve is provided at the bottom of the cylindrical cylinder seat 31, and the cylindrical cylinder seat 31 is equipped with a cylindrical support body 30 that can be inserted into the cylindrical cylinder seat 31. The top of the cylindrical support body 30 is connected to a top plate 34, and a sand filling hole 38 is provided on the top plate 34. After the cylindrical support body 30 is inserted into the cylindrical cylinder seat 31, the bottom wall of the top plate 34 of the cylindrical support body 30 just rests on the top edge of the cylindrical cylinder seat 31, and the cylindrical support body 30 is The bottom end just rests against the bottom wall of the cylindrical seat 31; the side wall of the cylindrical seat 31 is provided with a plurality of radially arranged screw holes, and each screw hole is fitted with a tightening bolt 32; a plurality of rolling supports 35 are provided under the bearing top frame 3, and the annular structure formed by all the rolling supports 35 is located directly below the motion trajectory of the columnar sample 12, and the rolling support 35 includes a vertical pole installed on a concrete foundation, and a bearing 36 is installed on the top of the vertical pole. The axes of all the bearings 36 intersect at the center of the circle corresponding to the motion trajectory of the columnar sample 12. When the solar tracking mechanism is running, the top of the bearing 36 is always in contact with the bottom wall of the bearing top frame 3.

[0077] The test method of the turntable natural environment accelerated light aging test device in this embodiment is used to conduct an accelerated light aging test on the coating of a large metal columnar sample 12 (with a rectangular cross section, a weight of 200 kg, and a height of 1 m). The steps include:

[0078] Step 11: Install a columnar sample 12, where each sidewall of the columnar sample 12 is divided into a first test area, a second test area, ... an Nth test area from bottom to top;

[0079] Step 110: Select a cylindrical cartridge 31 and a cylindrical support body 30, both 1.2 meters in length (the cross-sectional area of ​​the cylindrical support body 30 is larger than the cross-sectional area of ​​the cylindrical sample 12). First, install the cylindrical cartridge 31 on the supporting frame 3, and then insert the cylindrical support body 30 into the cylindrical cartridge 31. At this time, the bottom wall of the top plate 34 of the cylindrical support body 30 just touches the top edge of the cylindrical cartridge 31, and the bottom end of the cylindrical support body 30 just touches the bottom wall of the cylindrical cartridge 31.

[0080] Step 111: Install and adjust the tightening bolts 32 on the side wall of the cylindrical base 31 to make the cylindrical support body 30 in a vertical state;

[0081] Step 112, pouring sand 37 (or steel sand) into the cylindrical cartridge seat 31 through the through hole on the top plate 34 until the sand 37 fills the cavity of the cylindrical cartridge seat 31;

[0082] Step 113 , fixing the bottom plate 33 of the columnar sample 12 on the top plate 34 of the columnar support 30 ;

[0083] Step 12: Control the solar tracking mechanism to rotate in real time according to the solar azimuth angle. Simultaneously: control the reflectors 23 of the first row of reflector assemblies 2 to pitch and rotate according to the solar high angle until the reflected light from all the reflectors 23 in the first row illuminates the first test area of ​​the columnar sample; control the reflectors 23 of the second row of reflector assemblies 2 to pitch and rotate according to the solar high angle until the reflected light from all the reflectors 23 in the second row illuminates the second test area of ​​the columnar sample, and so on. Control the reflectors 23 of the Nth (N=3, 4, 5, ...) row of reflector assemblies 2 to pitch and rotate according to the solar high angle until the reflected light from all the reflectors 23 in the Nth row illuminates the Nth test area of ​​the columnar sample.

[0084] Step 13: When the temperature of a certain test area on the columnar sample 12 is detected to exceed the preset temperature upper limit, the one or more reflectors 23 corresponding to the test area are controlled to flip to a horizontal state / vertical state; when the temperature of the test area on the columnar sample 12 is detected to be lower than the preset temperature lower limit, the one or more reflectors 23 in the test area are controlled to flip to an effective reflective state; this step is repeated to ensure that the temperature of all test areas on the columnar sample 12 is always within the preset temperature range;

[0085] The aforementioned steps 11-13 only describe the accelerated light aging test on one sidewall of the columnar sample 12. If the test is to be performed on other sidewalls, it is only necessary to rotate the columnar sample 12 90 degrees each time and then follow steps 11-13.

[0086] Step 14: After the test is completed, the columnar sample 12 is removed, and then the valve on the discharge short pipe is opened to discharge the sand particles 37.

[0087] The solution in this embodiment is particularly suitable for stably and effectively conducting accelerated light aging tests on large cylindrical samples. It can achieve efficient enhancement of solar radiation effects, arbitrarily adjust the accelerated aging rate from 1 to 30 times, and perform light aging tests at constant radiation intensity. It can precisely stabilize the test temperature on the cylindrical sample 12 within a range of ±3°C. It facilitates precise and rapid adjustment of the radiation intensity of the sample's test area, and can complete radiation adjustment of any test area on the cylindrical sample within three seconds. The solution in this embodiment cleverly transforms the single-arm structure of the cylindrical sample into a plug-in structure (similar to inserting a pen into a pen holder). The cylindrical sample is secured by the combination of a tightening bolt (rigidity) and sand grains 37 (flexibility), preventing both sample shaking and sample deviation, while allowing for rapid sample installation and removal. Example 3

[0088] A turntable-type natural environment accelerated light aging test device, referring to Example 1, the main difference between it and Example 1 is that: the top of the reflector support plate 21 is hingedly connected to the back of the reflector 23 through a movable rod 22, and the back of the reflector 23 is also connected to the top plate 24 through a telescopic device 25, and when the telescopic device 25 is extended or shortened, the reflector 23 adaptively pitches and flips with the movement of the telescopic device 25.

[0089] The adoption of the scheme of the present invention can not only achieve efficient enhancement of the solar radiation light effect, but also achieve arbitrary adjustment of the accelerated aging rate by 1 to 100 times, and can also realize light aging tests with constant radiation intensity; the test device has a low center of gravity, has the ability to withstand wind resistance of level 10 wind, has no carbon emissions, is particularly suitable for installation in remote extreme climate zones, and is very convenient for installing samples; it is easy to accurately and quickly adjust the irradiation temperature of the sample test area, and can complete the irradiation adjustment of any test area on the sample within three seconds; it is not only suitable for carrying out accelerated light aging tests on small samples, but also can carry out accelerated light aging tests on large samples, and can also stably and effectively carry out accelerated aging tests on curved samples and columnar samples.

Claims

1. A test method using a turntable natural environment accelerated light aging test device, characterized in that the steps include: Step 1: Install the cylindrical sample (12) as follows: Step 110, first install the cylindrical barrel seat (31) on the bearing top frame (3), and then insert the cylindrical support body (30) into the cylindrical barrel seat (31), at this time, the bottom wall of the top flat plate (34) of the cylindrical support body (30) just abuts against the top edge of the cylindrical barrel seat (31), and the bottom end of the cylindrical support body (30) just abuts against the bottom wall of the cylindrical barrel seat (31); Step 111, installing and adjusting the tightening bolts (32) on the side wall of the cylindrical cartridge seat (31) so that the cylindrical support body (30) is in a vertical state; Step 112, pouring sand into the cylindrical cartridge seat (31) from the through hole on the top plate (34) until the sand fills the cavity of the cylindrical cartridge seat (31); Step 113, fixing the bottom plate (33) of the columnar sample (12) on the top plate (34) of the columnar support (30); Step 2, adjusting the reflectors (23) of all reflector assemblies (2) to a suitable inclination angle until the reflected light from all reflectors (23) can illuminate the test area of ​​the sample; Step 3, controlling the sun tracking mechanism to rotate according to the sun's azimuth angle, ensuring that the supporting top frame (3) always rotates in accordance with the sun's azimuth angle; controlling the reflector (23) of the reflector assembly (2) to pitch and rotate according to the sun's altitude angle, ensuring that the reflected light of the reflector (23) is irradiated to the test area of ​​the sample; Step 4, when it is detected that the temperature of the sample (11) exceeds a preset upper temperature limit, one or more reflective mirrors (23) are controlled to flip to a horizontal state or a vertical state; Step 5, when it is detected that the temperature on the sample (11) is lower than the preset temperature lower limit, controlling one or more reflective mirrors (23) to flip to the state of the reflective mirrors (23) after adjustment in step 2; Step 6, repeatedly performing steps 4 and 5 to ensure that the temperature on the sample (11) is always within the preset temperature range; A turntable-type natural environment accelerated light aging test device comprises a solar tracking mechanism, a power supply system, a temperature monitoring system, and an ultraviolet light reflection system and a sample target plate assembly (1) arranged on a supporting top frame (3) of the solar tracking mechanism, characterized in that: the ultraviolet light reflection system comprises a plurality of independent and spaced reflector assemblies (2), each reflector assembly (2) comprises a rotating support (20), a reflector support plate (21) is mounted on a top plate (24) of the rotating support (20), the reflector support plate (21) is connected to a reflector (23), the reflector (23) can be tilted to a suitable angle, and the mirror surfaces of some or all of the reflectors (23) can jointly form a reflecting sphere that reflects ultraviolet light to a test area of ​​the sample target plate; The reflector (23) can be flipped to a horizontal state and / or a vertical state; the top of the reflector support plate (21) is hingedly connected to the back of the reflector (23) through a movable rod (22), and the back of the reflector (23) is also connected to the top plate (24) through a telescoping device (25), and when the telescoping device (25) is extended or shortened, the reflector (23) performs adaptive pitch flipping along with the movement of the telescoping device (25); the sample target plate assembly (1) includes a column (10), and a sample (11) is installed on the top of the column (10); the power supply system adopts a solar power supply system, and the solar panel (4) of the solar power supply system is located between the sample target plate assembly (1) and the ultraviolet light reflection system, and the highest point of the solar panel (4) is lower than all ultraviolet light reflection paths.

2. A test method using a turntable natural environment accelerated light aging test device, characterized in that the steps include: Step 11: Install the cylindrical sample (12) using the following steps: Step 110, first install the cylindrical barrel seat (31) on the bearing top frame (3), and then insert the cylindrical support body (30) into the cylindrical barrel seat (31), at this time, the bottom wall of the top flat plate (34) of the cylindrical support body (30) just abuts against the top edge of the cylindrical barrel seat (31), and the bottom end of the cylindrical support body (30) just abuts against the bottom wall of the cylindrical barrel seat (31); Step 111, installing and adjusting the tightening bolts (32) on the side wall of the cylindrical cartridge seat (31) so that the cylindrical support body (30) is in a vertical state; Step 112, pouring sand into the cylindrical cartridge seat (31) from the through hole on the top plate (34) until the sand fills the cavity of the cylindrical cartridge seat (31); Step 113, fixing the bottom plate (33) of the columnar sample (12) on the top plate (34) of the columnar support (30); Step 12, adjusting the reflectors (23) of all reflector assemblies (2) to a suitable inclination angle until the reflected light from all reflectors (23) can illuminate the test area of ​​the sample; Step 13, controlling the solar tracking mechanism to rotate in real time according to the solar azimuth angle, and at the same time: controlling the reflectors (23) of the first row of reflector assemblies (2) to perform pitch rotation according to the solar high angle until the reflected light of all the reflectors (23) in the first row irradiates the first test area of ​​the columnar sample (12); controlling the reflectors (23) of the second row of reflector assemblies (2) to perform pitch rotation according to the solar high angle until the reflected light of all the reflectors (23) in the second row irradiates the second test area of ​​the columnar sample (12) ..., controlling the reflectors (23) of the Nth (N=3, 4, 5...) row of reflector assemblies (2) to perform pitch rotation according to the solar high angle until the reflected light of all the reflectors (23) in the Nth row irradiates the Nth test area of ​​the columnar sample (12); Step 14, when it is monitored that the temperature of a certain test area on the columnar sample (12) exceeds the preset temperature upper limit, one or more reflectors (23) corresponding to the test area are controlled to flip to a horizontal state or a vertical state; when it is monitored that the temperature of the test area on the sample (11) is lower than the preset temperature lower limit, one or more reflectors (23) in the test area are controlled to flip to an effective reflection state; this step is repeatedly performed to ensure that the temperature of all test areas on the columnar sample (12) is always within the preset temperature range; A turntable-type natural environment accelerated light aging test device comprises a solar tracking mechanism, a power supply system, a temperature monitoring system, and an ultraviolet light reflection system and a sample target plate assembly (1) arranged on a supporting top frame (3) of the solar tracking mechanism, characterized in that: the ultraviolet light reflection system comprises a plurality of independent and spaced reflector assemblies (2), each reflector assembly (2) comprises a rotating support (20), a reflector support plate (21) is mounted on a top plate (24) of the rotating support (20), the reflector support plate (21) is connected to a reflector (23), the reflector (23) can be tilted to a suitable angle, and the mirror surfaces of some or all of the reflectors (23) can jointly form a reflecting sphere that reflects ultraviolet light to a test area of ​​the sample target plate; The reflector (23) can be flipped to a horizontal state and / or a vertical state; the top of the reflector support plate (21) is hingedly connected to the back of the reflector (23) through a movable rod (22), and the back of the reflector (23) is also connected to the top plate (24) through a telescoping device (25), and when the telescoping device (25) is extended or shortened, the reflector (23) performs adaptive pitch flipping along with the movement of the telescoping device (25); the sample target plate assembly (1) includes a column (10), and a sample (11) is installed on the top of the column (10); the power supply system adopts a solar power supply system, and the solar panel (4) of the solar power supply system is located between the sample target plate assembly (1) and the ultraviolet light reflection system, and the highest point of the solar panel (4) is lower than all ultraviolet light reflection paths.

3. The test method according to claim 1 or 2, characterized in that: A transversely arranged motor (26) is provided on the reflector support plate (21); an output shaft of the motor (26) is connected to a movable rod (22); the other end of the movable rod (22) is fixedly connected to the back of the reflector (23); and the back of the reflector (23) is further connected to the top plate (24) via a telescopic rod (27); when the motor (26) rotates, the movable rod (22) and the reflector (23) are driven to pitch and flip synchronously.

4. The test method according to claim 1 or 2, characterized in that: The reflector assembly (2) comprises a plurality of rows of reflector assemblies (2) arranged in an array, the reflectors (23) of the reflector assemblies (2) in the same row are arranged at the same height, and the reflector assemblies (2) in different rows are arranged in a gradient manner, with the reflectors (23) in the rear row being higher than the reflectors (23) in the front row.

5. The test method according to claim 1 or 2, characterized in that: The sun tracking mechanism, the temperature monitoring system, and the drive system of the reflector assembly (2) are respectively connected to a controller, the controller comprising a memory, a processor, and a program stored in the memory and operable on the processor, and the processor implements the following steps / functions when executing the program: Read the satellite time, and calculate the real-time azimuth and altitude of the sun according to the set longitude and latitude data; Control the sun tracking mechanism to rotate according to the sun's azimuth angle to ensure that the supporting frame always rotates with the sun's azimuth; control the reflector of the reflector assembly to pitch according to the sun's altitude angle to ensure that the reflected light of the reflector always illuminates the test area of ​​the sample; Control the start and stop of the air cooling fan installed at the target plate to cool the sample during the test; The control device starts and stops the spray water pump, sprays the sample according to the test requirements during the test, and strengthens the comprehensive effects of dry-wet alternation and light aging; Read the data fed back by the solar ultraviolet radiation sensor and the sample temperature sensor at the sample target plate, and adjust and control the test state according to the test parameters.

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