Phase change material core material leakage measuring device
By designing a phase change material core leakage measurement device including core material testing box and image acquisition device, the measurement inaccurate problem caused by core material leakage during heating is solved, automatic and accurate measurement is achieved, and measurement efficiency is improved and accuracy.
Patent Information
- Application Number
- CN202420900507.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-04-26
AI Technical Summary
In the prior art, the phase change material has a core leakage problem during heating, resulting in inaccurate measurement results and time-consuming and labor-intensive.
A phase change material core leakage measurement device including a core material test box and an image acquisition device is designed. A heating device is set up in the core material test box, and the image acquisition device collects images of phase change materials through a high-definition camera to automatically detect leakage.
Automatic and accurate measurement of the leakage of phase change material core materials is realized, the accuracy and efficiency of measurement are improved, and measurement errors caused by human factors are avoided.
Smart Images
Figure CN222482121U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of asphalt testing of highway engineering, in particular to a phase change material core material leakage measuring device. Background Art
[0002] Phase change materials (PCMs) are materials that achieve latent heat storage and heat release through phase change. When the material's own phase change temperature is reached, the storage and heat release process can be triggered. It has the characteristics of intelligence and spontaneity. It can significantly reduce the temperature change of the material through energy storage and heat release. It has the functions of energy saving and emission reduction and improving the temperature distribution of engineering structures, thereby improving the structural strength and durability. There are many types of PCMs, including paraffin, polyols, fatty acids, hydrated salts, molten salts, etc., which are mainly divided into two categories: solid-solid phase change materials and solid-liquid phase change materials. Considering the requirements of asphalt pavement for mechanical properties and phase change properties, pure PCMs are difficult to adapt. Therefore, researchers use materials, carriers, sol-gel, coating and other means to improve the performance of PCMs and complete the established functionality, such as anti-leakage, improving thermal conductivity and latent heat, adjusting phase change temperature, etc. However, in actual application, it is found that the phase change material has the problem of core material leakage. In order to accurately study the leakage problem of the core material, the phase change material needs to be heated first and the timing is started when the heating begins. In addition, the tester needs to observe whether the phase change material leaks at all times to determine the moment when the phase change material leaks. However, during the test, objective or subjective factors often lead to missing the moment when the phase change material begins to leak, making the measurement results inaccurate and time-consuming. Utility Model Content
[0003] In view of the problems existing in the prior art, the utility model provides a phase change material core leakage measuring device, which can realize automatic and accurate measurement of the phase change material core leakage.
[0004] The utility model is realized by the following technical solutions:
[0005] A phase change material core leakage measurement device, comprising a core material test box and an image acquisition device;
[0006] The core material test box comprises a box body and a heating device arranged in the box body, the phase change material is arranged in the box body, and the heating device is used to heat the phase change material in the box body to make the core material of the phase change material leak;
[0007] The image acquisition device includes a frame, an image acquisition instrument and a sliding device arranged on the top of the frame. The image acquisition instrument is connected to the sliding device, and the sliding device is used to adjust the position of the image acquisition instrument so that the phase change material is located in the shooting field of view of the image acquisition instrument.
[0008] Preferably, the heating device is arranged at the inner bottom of the box body, a sample table is arranged on the top of the heating device, a sample tray is arranged on the sample table, and the phase change material is placed in the sample tray.
[0009] Preferably, the sample tray is provided with a plurality of mutually independent sample grids.
[0010] Preferably, the heating device includes a heating wire and a temperature control panel connected thereto, the heating wire is arranged on the lower bottom surface of the box, the temperature control panel is arranged on the outer wall of the box, a partition is arranged on the top of the heating wire, and the sample stage is arranged on the partition.
[0011] Preferably, a temperature sensor is provided in the box for collecting the temperature in the box, and the temperature sensor is connected to the heating device.
[0012] Preferably, a spray head is provided on the top of the box, and the spray head is connected to a water source.
[0013] Preferably, the top of the box is a transparent structure, and the image acquisition device is arranged on the top of the box.
[0014] Preferably, the sliding device comprises a guide rail and a pulley;
[0015] The image acquisition instrument is connected to the pulley through a bracket, the pulley is connected to the track, and the guide rail is horizontally arranged on the top of the frame.
[0016] Preferably, the image acquisition includes at least one camera.
[0017] Compared with the prior art, the utility model has the following beneficial technical effects:
[0018] The utility model provides a device for measuring the leakage of a core material of an asphalt pavement phase change material. The phase change material is heated in a closed environment according to different phase change temperatures of different phase change materials. An image acquisition device is provided on the top of a core material test box. The image of the phase change material is synchronously acquired by the image acquisition device. The leakage time of the phase change material and the leakage temperature of the phase change material can be accurately acquired according to the acquired image, thereby ensuring the accuracy of the measurement. At the same time, the leakage time of the phase change material can also be studied under different heating rates. The utility model obtains the leakage percentage by comparing and analyzing the leakage areas of the phase change material in different time periods. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The utility model is a schematic structural diagram of a phase change material core leakage measuring device.
[0020] In the figure: 1-heating wire; 2-screw; 3-sample table; 4-partition; 5-sample tray; 6-transparent insulating glass; 7-high-definition camera; 8-camera bracket; 9-pulley; 10-guide rail; 11-data wire; 12-computer host; 13-computer monitor; 14-instrument switch; 15-box door and handle; 16-box body; 17-temperature control panel; 18-frame. DETAILED DESCRIPTION
[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings, which are intended to explain the present invention rather than to limit it.
[0022] See also Figure 1 , a phase change material core leakage measurement device, comprising a core material test box and an image acquisition device;
[0023] The core material test box comprises a box body and a heating device arranged in the box body, the phase change material is arranged in the box body, and the heating device is used to heat the phase change material to destroy it, so that the core material of the phase change material leaks;
[0024] The image acquisition device includes a frame 18 and an image acquisition instrument, and a sliding device arranged on the top of the frame. The image acquisition instrument is connected to the sliding device, and the sliding device is used to adjust the position of the image acquisition instrument so that it faces the phase change material.
[0025] The measuring device heats the phase change material in a closed environment, and an image acquisition device is arranged on the top of the core material test box. The image of the phase change material is synchronously acquired by the image acquisition device. The leakage time of the phase change material and the leakage temperature of the phase change material can be accurately obtained according to the acquired image, thereby ensuring the accuracy of the measurement. At the same time, the leakage time of the phase change material under different heating rates can also be used, thereby solving the problem of inaccurate, time-consuming and labor-intensive existing manual measurement.
[0026] The box body 16 of the core material test box is a hollow structure, with a box door 15 on one side, a handle on the box door 15, a heating device arranged at the inner bottom of the box body, a sample table 3 arranged on the top of the heating device, a sample tray 5 arranged on the sample table 3, and the phase change material is placed in the sample tray 5.
[0027] The heating device includes a heating wire 1 and a temperature control panel 17 connected thereto. The heating wire 1 is arranged on the lower bottom surface of a box body 16. The temperature control panel 17 is arranged on the outer wall of the box body. The temperature of the heating wire is controlled by the temperature control panel 17. A partition 4 is arranged on the top of the heating wire to prevent burns or the sample from falling into the heating wire 1 and burning during the test. The two sides of the sample table 3 are fixed to the partition by screws 2, and the sample table is located directly above the heating wire. The sample tray 5 is movably placed on the sample table. The sample tray 5 is not fixed and only needs to be placed in the middle position of the sample table 3 during the test to facilitate the taking of the phase change material.
[0028] The sample tray has a size of 100mm×100mm and is evenly divided into 9 squares. The 9 squares are arranged in a rectangular array, and the phase change material is set in the central square. When the core material of the phase change material leaks, it overflows into the adjacent squares. The amount of phase change material leakage can be determined based on the phase change material in other squares.
[0029] The temperature control panel can set the temperature inside the environmental chamber with an accuracy of 0.1°C.
[0030] A temperature sensor is also provided in the box for collecting the temperature in the box. The temperature sensor is connected to a temperature control panel 17 , and the temperature control panel 17 displays the temperature in the box in real time.
[0031] In order to avoid danger during the test, a sprinkler head is provided on the top of the box, and the sprinkler head is connected to a water source, such as a faucet. When a fire occurs during the test, the power supply is disconnected to spray water quickly.
[0032] The image acquisition device is arranged on the top of the core material test box, the top of the core material test box is transparent insulating glass 6, the frame 18 is arranged on the top of the box body, the sliding device includes a guide rail 10 and a pulley 9, the image acquisition instrument is connected to the pulley through a bracket, the pulley is connected to the track, and the guide rail is horizontally arranged on the top of the frame. During the test, the image acquisition instrument can manually adjust the position of the pulley 9 to change its own position. The image acquisition instrument is connected to the computer control end through a data wire 11, and the temperature control panel 17 is connected to the computer control end. The clarity of the image acquisition instrument is adjusted through the computer control end to make the collected image clear and visible, and the temperature can also be adjusted at the same time.
[0033] The computer control terminal is a computer 16 , and the image acquisition device is a high-definition camera 7 .
[0034] The number of the high-definition camera 7 is at least one. When one camera is used to capture images, the camera is located directly above the phase change material to fully capture the changes in the phase change material.
[0035] In another embodiment, two cameras are used, the two cameras are symmetrically placed along the phase change material, and the two cameras are connected to a computer; four cameras can also be used, and the four cameras are arranged along a rectangle to capture 360° images of the phase change material without blind spots.
[0036] During the test, first take out the sample tray 5, turn on the instrument switch 14 and set the test temperature through the temperature control panel 17. When the temperature reaches the specified temperature, spread the phase change material to be tested in the middle grid of the sample tray 5 with a thickness not exceeding 5 mm. Then put the sample tray 5 into the box 16 and roughly locate it in the middle position of the sample table 3. After placing it, close the box door 15. Finally, adjust the position and focal length of the high-definition camera 7 to ensure that the photos taken are clear and located in the middle. Collect images of the phase change material test process according to the set sampling time. When the phase change material leaks, the test is completed. The leakage time and temperature of the phase change material can be accurately known based on the collected images.
[0037] The phase change material can also be placed in a box at room temperature, and then heated at different heating rates to obtain the core material leakage time and temperature of the phase change material at different heating rates.
[0038] The utility model discloses a phase change material core leakage measurement device. When in use, take an appropriate amount of the phase change material sample to be tested and spread it on a sample tray, then place the sample tray on the sample table, adjust the sample tray so that it is located in the middle of the sample table, or adjust the position of the high-definition camera to aim the high-definition camera lens at the sample to be tested. After adjusting the position of the sample to be tested, adjust the focal length of the high-definition camera so that the entire sample tray is clearly displayed on the computer screen. At this point, the preparation work before the test is completed, and then the data sampling work can be completed by setting the test time and the time interval for taking photos on the computer. Finally, the leakage test can be completed by comparing and analyzing the photos taken through a computer program. This application is designed for different phase change materials with different phase change temperatures, so that each phase change material can reach the phase change condition to undergo phase change, and the core material of the phase change material leaks during the phase change process. The image of the phase change material is captured by an infrared high-definition camera to obtain the core material leakage time of the phase change material.
[0039] The above content is only for explaining the technical idea of the utility model and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.
Claims
1. A phase change material core leakage measurement device, characterized in that: It includes a core material test box and an image acquisition device; The core material test box comprises a box body and a heating device arranged in the box body, the phase change material is arranged in the box body, and the heating device is used to heat the phase change material in the box body to make the core material of the phase change material leak; The image acquisition device includes a frame, an image acquisition instrument and a sliding device arranged on the top of the frame. The image acquisition instrument is connected to the sliding device, and the sliding device is used to adjust the position of the image acquisition instrument so that the phase change material is located in the shooting field of view of the image acquisition instrument.
2. A phase change material core leakage measurement device according to claim 1, characterized in that: The heating device is arranged at the inner bottom of the box body, a sample table is arranged on the top of the heating device, a sample tray is arranged on the sample table, and the phase change material is placed in the sample tray.
3. A phase change material core leakage measurement device according to claim 2, characterized in that: The sample tray is provided with a plurality of mutually independent sample grids.
4. A phase change material core leakage measurement device according to claim 2, characterized in that: The heating device comprises a heating wire and a temperature control panel connected thereto, the heating wire is arranged on the lower bottom surface of the box body, the temperature control panel is arranged on the outer wall of the box body, a partition is arranged on the top of the heating wire, and the sample stage is arranged on the partition.
5. A phase change material core leakage measurement device according to claim 1, characterized in that: The box is provided with a temperature sensor for collecting the temperature in the box, and the temperature sensor is connected to the heating device.
6. A phase change material core leakage measurement device according to claim 1, characterized in that: A spray head is arranged on the top of the box body, and the spray head is connected to a water source.
7. A phase change material core leakage measurement device according to claim 1, characterized in that: The top of the box is a transparent structure, and the image acquisition device is arranged on the top of the box.
8. A phase change material core leakage measurement device according to claim 1, characterized in that: The sliding device comprises a guide rail and a pulley; The image acquisition instrument is connected to the pulley through a bracket, the pulley is connected to the track, and the guide rail is horizontally arranged on the top of the frame.
9. A phase change material core leakage measurement device according to claim 1, characterized in that: The image acquisition includes at least one camera.