Fluid temperature field tomography visualization detection device

Abstract

The present invention provides a fluid temperature field tomography visualization detection device comprises a planar temperature measuring element and an infrared thermal imager. The planar temperature measuring element is configured to detect a temperature of a fluid cross section, the planar temperature measuring element includes a suspended carbon nanotube layer. The infrared thermal imager is spaced apart from the planar temperature measuring element, and is configured to detect infrared signals of the suspended carbon nanotube layer, and to form an image based on the infrared signals of the carbon nanotube layer, so as to obtain the cross-sectional temperature distribution of the fluid temperature field.

Description

[Technical Field]

[0001] This invention relates to a fluid temperature field tomography visualization detection device, and more particularly to a fluid temperature field tomography visualization detection device based on carbon nanotubes. [Previous Technology]

[0002] In real life and scientific research, it is often necessary to measure the temperature of fluids. For example, in the prior art, thermometers are commonly used to measure temperature. The advantages of thermometers are that they are simple to operate, inexpensive, and provide accurate temperature values. However, when using thermometers to measure fluid temperature, they often have the following disadvantages: they can only measure the temperature of a local point, the response is slow, and they cannot measure rapidly changing or large-area fluid temperature fields.

[0003] Therefore, it is of great significance to provide a fluid temperature field tomography visualization detection device. [Summary of the Invention]

[0004] In view of the above, the present invention provides a fluid temperature field tomography visualization detection device.

[0005] A fluid temperature field tomographic visualization detection device, comprising:

[0006] A planar temperature sensing element for detecting the temperature of a fluid cross section, comprising a suspended carbon nanotube layer;

[0007] An infrared thermal imager is provided at intervals with the planar temperature measuring element. The infrared thermal imager is used to detect the infrared signal of the suspended part of the carbon nanotube layer and to image the carbon nanotube layer based on the infrared signal.

[0008] The fluid temperature field tomography visualization detection device provided by this invention utilizes the principle of rapid response of carbon nanotube layers to ambient temperature. It can sensitively detect the temperature of the fluid under test, rapidly heat up or cool down to the same temperature as the cross-section of the fluid under test, thereby radiating infrared signals of different energies, which are then detected and imaged by an infrared thermal imager, realizing the visualization of fluid temperature field tomography. This detection device has a simple structure, is easy to operate, and has a wide range of applications.

Implementation Method

[0009] The fluid temperature field tomography visualization detection device and detection method provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0010] Please refer to Figure 1. An embodiment of the present invention provides a fluid temperature field tomography visualization detection device 10. The fluid temperature field tomography visualization detection device 10 includes: a planar temperature measuring element 100, which is used to detect the temperature of a fluid cross section, and includes a suspended carbon nanotube layer 102; and an infrared thermal imager 104, which is disposed at an interval from the planar temperature measuring element 100, and is used to detect the infrared signal of the suspended carbon nanotube layer 102, and to image the carbon nanotube layer 102 based on the infrared signal.

[0011] The fluid can be a gas or a liquid. The specific gas or liquid to be tested is not limited, as long as it is ensured that the fluid to be tested is transparent in a specific infrared band and does not chemically react with the carbon nanotube material. In this embodiment, the fluid to be tested is a gas.

[0012] The planar temperature sensing element 100 further includes a bracket (not shown), a first electrode 106, a second electrode 108, and a power supply 110. The first electrode 106 and the second electrode 108 are disposed at both ends of the carbon nanotube layer 102 and are electrically connected to the carbon nanotube layer 102. The power supply 110 provides current to the carbon nanotube layer through the first electrode 106 and the second electrode 108. The carbon nanotube layer 102 is a self-supporting structure. Self-support means that the carbon nanotube layer 102 does not require a large area of ​​carrier support, but can be suspended and maintain its overall state as long as support is provided on both sides. That is, when the carbon nanotube layer 102 is placed (or fixed) on two support frames set at a certain distance, the carbon nanotube layer 102 located between the two support frames can be suspended and maintain its overall state. The bracket is used to support the carbon nanotube layer 102 and can ensure that the carbon nanotube layer 102 is suspended. Preferably, the support only contacts the edge of the carbon nanotube layer 102. For example, the support can be a hollow frame or multiple spaced columns. In this embodiment, the support is a hollow frame.

[0013] The carbon nanotube layer 102 may include at least one carbon nanotube film. The at least one carbon nanotube film includes multiple carbon nanotubes connected by van der Waals forces. The multiple carbon nanotubes may be arranged in an ordered or disordered manner. The thickness of the carbon nanotube layer ranges from 1 nanometer to 100 micrometers. The at least one carbon nanotube film may be a thin film of super-aligned carbon nanotubes. The at least one carbon nanotube film may be a structure composed solely of carbon nanotubes. The at least one carbon nanotube film may include a single super-aligned carbon nanotube film, or it may include multiple super-aligned carbon nanotube films stacked together. When the carbon nanotube layer includes multiple super-aligned carbon nanotube films, these multiple super-aligned carbon nanotube films are stacked. The intersection angle between the carbon nanotubes in two adjacent super-aligned carbon nanotube films can be any angle, preferably 90 degrees, so that the resulting carbon nanotube layer is more stable and less prone to damage.

[0014] The super-aligned carbon nanotube film is a carbon nanotube film obtained by pulling from a carbon nanotube array. Referring to Figure 2, the super-aligned carbon nanotube film comprises multiple carbon nanotubes preferentially oriented in the same direction and arranged parallel to the surface of the super-aligned carbon nanotube film. The carbon nanotubes are connected end-to-end by van der Waals forces in the extending direction of the nanotubes. Each super-aligned carbon nanotube film comprises multiple continuous and oriented carbon nanotube segments. These multiple carbon nanotube segments are connected end-to-end by van der Waals forces. Each carbon nanotube segment comprises multiple parallel carbon nanotubes, which are tightly connected by van der Waals forces. The carbon nanotube segments have arbitrary width, thickness, uniformity, and shape. The thickness of the super-aligned carbon nanotube film is 1 nanometer to 100 micrometers.

[0015] In other embodiments, the carbon nanotube layer 102 can also be a layered structure composed of multiple carbon nanotubes. The multiple carbon nanotubes are arranged in parallel to form the carbon nanotube layer 102, or multiple carbon nanotubes are braided to form the carbon nanotube layer 102. Each carbon nanotube includes multiple carbon nanotubes that extend along the axial direction of the carbon nanotube and are connected end-to-end. The extension direction of the multiple carbon nanotubes can be parallel to the axial direction of the carbon nanotube, as shown in Figure 3; the multiple carbon nanotubes can also extend spirally along the axial direction of the carbon nanotube, as shown in Figure 4. The diameter of each carbon nanotube is 10 nanometers to 100 micrometers. The carbon nanotube layer 102 braided from carbon nanotubes has higher strength and is less prone to breakage.

[0016] In this embodiment, the carbon nanotube layer 102 includes two vertically arranged super-aligned carbon nanotube films.

[0017] The first electrode 106, the second electrode 108, and the power supply 110 are used to provide electrical energy to the carbon nanotube layer 102, which can be heated by Joule heating. When there is a temperature difference between the carbon nanotube layer 102 and the fluid to be tested, it is not necessary to turn on the power supply. When the temperature of the carbon nanotube layer 102 and the temperature of the fluid to be tested are the same or the difference is small, the changes in the fluid temperature field and flow field cannot be clearly observed. It is necessary to turn on the power supply to heat the carbon nanotube layer 102 to create a suitable temperature difference between the carbon nanotube layer 102 and the fluid to be tested. Alternatively, the fluid can be slightly heated while the carbon nanotube layer 102 remains unheated.

[0018] The infrared thermal imager 104 is spaced apart from the planar temperature measuring element 100. The infrared thermal imager 104 includes a camera and is positioned directly facing the carbon nanotube layer 102. The infrared thermal imager 104 can capture infrared signals from the surface of the carbon nanotube layer 102 through the camera. Depending on the strength of the infrared signal, the infrared thermal imager 104 displays different colors. The strength of the infrared signal emitted by the carbon nanotube layer 102 is related to the temperature of the fluid being measured. Because the thermal conductivity of the carbon nanotubes in the carbon nanotube layer 102 is between 0.1 and 0.2 W / m·K, the heat capacity of the carbon nanotube layer 102 is relatively small, allowing it to quickly respond to changes in the surrounding temperature. Therefore, when the planar temperature sensing element 100 is placed in the fluid to be measured, due to the temperature difference between the carbon nanotube layer 102 and the surrounding fluid, the carbon nanotube layer 102 is rapidly heated or cooled by the fluid. The temperature change on the surface of the carbon nanotube layer 102 emits an infrared signal, which is captured by an infrared thermal imager 104, which displays an infrared image of the surface of the carbon nanotube layer 102. Based on this infrared image, the specific temperature represented by the infrared image can be determined through comparative experiments. The temperature of the surface of the carbon nanotube layer 102 represents the temperature field distribution of the fluid to be measured in the cross-section of the fluid where the carbon nanotube layer 102 is located. The model and type of the infrared thermal imager 104 are not limited, as long as it can image the temperature distribution of the carbon nanotube layer 102.

[0019] The fluid temperature field tomography visualization detection device 10 can detect the cross-sectional temperature field distribution of the airflow. Referring to Figure 3, fluid is ejected from a nozzle in a pipe, with the airflow direction perpendicular to the carbon nanotube layer 102. By adjusting the distance between the carbon nanotube layer 102 and the nozzle, the temperature field distribution of multiple cross-sections after the airflow exits the nozzle can be measured.

[0020] The fluid temperature field tomography visualization detection device 10 can detect the longitudinal section temperature field distribution of the airflow. Referring to Figure 4, fluid is ejected from a nozzle in a pipe, with the airflow direction parallel to the carbon nanotube layer 102. The nozzle contacts one side of the carbon nanotube layer 102. By changing the distance between the carbon nanotube and the central tangential surface of the nozzle in a direction perpendicular to the carbon nanotube layer 102, the temperature field distribution of multiple longitudinal sections after the airflow exits the nozzle can be measured. In a specific embodiment, Figure 5 shows an infrared image obtained when the surface of the carbon nanotube layer 102 is close to the outer surface of the nozzle; Figure 6 shows an infrared image obtained when the distance between the surface of the carbon nanotube layer 102 and the outer surface of the nozzle is 1.5 mm; Figure 7 shows an infrared image obtained when the distance between the surface of the carbon nanotube layer 102 and the outer surface of the nozzle is 3 mm. By changing the position of the carbon nanotube layer 102, multiple airflow infrared images can be obtained, as shown in Figure 8. Then, through computer synthesis, a 3D infrared photograph of the airflow can be obtained. Based on the colors in the image, the cross-sectional temperature distribution of the airflow and the temperature distribution of the entire airflow itself can be obtained.

[0021] Please refer to Figure 12. A second embodiment of the present invention provides a fluid temperature field tomography visualization detection device 20. The fluid temperature field tomography visualization detection device 20 includes a plurality of planar temperature measuring elements 100, which are used to detect the temperature of a fluid cross section. Each planar temperature measuring element 100 includes a suspended carbon nanotube layer (not shown in the figure); and an infrared thermal imager 104, which is spaced apart from the plurality of planar temperature measuring elements 100. The infrared thermal imager 104 is used to detect the infrared signal of the suspended portion of the carbon nanotube layer and to image the data based on the infrared signal of the carbon nanotube layer.

[0022] The plurality of planar temperature sensing elements 100 are arranged side-by-side at intervals on the cross-section of the fluid to be measured. The number of these elements is not limited and can be set according to actual needs. By adjusting the focal length of the infrared thermal imager 104, the temperature field on the fluid cross-section where the plurality of planar temperature sensing elements 100 are located can be obtained. In this embodiment, there are four planar temperature sensing elements 100, and the distance between each planar temperature sensing element 100 is 1.5 mm.

[0023] Apart from the features mentioned above, the fluid temperature field tomography visualization detection device 20 provided in this embodiment has the same structure and properties as the fluid temperature field tomography visualization detection device 10 provided in the first embodiment, and will not be described in detail here.

[0024] The fluid temperature field tomography visualization detection device provided by this invention utilizes the principle of rapid response of carbon nanotube layers to ambient temperature. It can sensitively detect the temperature of the fluid under test, rapidly heat up or cool down to the same temperature as the cross-section of the fluid under test, thereby radiating infrared signals of different energies, which are then detected and imaged by an infrared thermal imager, realizing the visualization of fluid temperature field tomography. This detection device has a simple structure, is easy to operate, and has a wide range of applications.

[0025] In summary, the present invention has indeed met the requirements for an invention patent, and therefore a patent application has been filed in accordance with the law. However, the above description is only a preferred embodiment of the present invention and should not be used to limit the scope of the patent application. All equivalent modifications or variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of the following patent application. [Simplified Explanation of the Diagram]

[0026] Figure 1 is a schematic diagram of the structure of the fluid temperature field tomography visualization detection device provided in the first embodiment of the present invention.

[0027] Figure 2 is a scanning electron microscope image of the carbon nanotube layer provided in the embodiment of the present invention.

[0028] Figure 3 is a scanning electron microscope image of the carbon nanotubes provided in the embodiment of the present invention.

[0029] Figure 4 is a scanning electron microscope image of another type of carbon nanotube provided in an embodiment of the present invention.

[0030] Figure 5 is a schematic diagram of the structure of the fluid temperature field tomography visualization detection device in Figure 1 when testing the temperature field of the longitudinal section of the airflow.

[0031] Figure 6 is a schematic diagram of the structure of the fluid temperature field tomography visualization detection device in Figure 1 when testing the temperature field of the transverse section of the airflow.

[0032] Figure 7 is an infrared photograph displayed by an infrared thermal imager when the distance between the carbon nanotube layer and the outer diameter of the airflow nozzle is 0 mm when the longitudinal section temperature of the airflow is tested using the fluid temperature field tomography visualization detection device provided in the embodiment of the present invention.

[0033] Figure 8 is an infrared photograph displayed by an infrared thermal imager when the distance between the carbon nanotube layer and the outer diameter of the airflow nozzle is 1.5 mm when the longitudinal section temperature of the airflow is tested using the fluid temperature field tomography visualization detection device provided in the embodiment of the present invention.

[0034] Figure 9 is an infrared photograph displayed by an infrared thermal imager when the distance between the carbon nanotube layer and the outer diameter of the airflow nozzle is 3 mm when the longitudinal section temperature of the airflow is tested using the fluid temperature field tomography visualization detection device provided in the embodiment of the present invention.

[0035] Figure 10 shows infrared photographs of multiple longitudinal sections displayed by an infrared thermal imager when the longitudinal section temperature of an airflow is tested using the fluid temperature field tomography visualization detection device provided in the embodiment of the present invention.

[0036] Figure 11 is a 3D temperature field image of airflow simulated in an embodiment of the present invention.

[0037] Figure 12 is a schematic diagram of the structure of the fluid temperature field tomography visualization detection device provided in the second embodiment of the present invention. [Biomaterial Storage]

[0039] None

Claims

1. A fluid temperature field tomographic visualization detection device, the improvement of which includes: A planar temperature sensing element for detecting the temperature of a fluid cross-section includes a suspended carbon nanotube layer located in the fluid, the carbon nanotube layer being a self-supporting structure; and an infrared thermal imager spaced apart from the planar temperature sensing element, the infrared thermal imager for detecting infrared signals on the surface of the suspended portion of the carbon nanotube layer and creating an image based on the infrared signals of the carbon nanotube layer.

2. The fluid temperature field tomographic visualization detection device as described in claim 1, wherein, The planar temperature sensing element further includes a bracket, a first electrode, a second electrode, and a power supply.

3. The fluid temperature field tomographic visualization detection device as described in claim 2, wherein, The first electrode and the second electrode are disposed at both ends of the carbon nanotube layer and are electrically connected to the carbon nanotube layer. The power supply provides current to the carbon nanotube layer through the first electrode and the second electrode.

4. The fluid temperature field tomographic visualization detection device as described in claim 2, wherein, The support is used to support the carbon nanotube layer and ensure that the carbon nanotube layer is suspended in the air.

5. The fluid temperature field tomographic visualization detection device as described in claim 1, wherein, The carbon nanotube layer is a self-supporting structure.

6. The fluid temperature field tomographic visualization detection device as described in claim 1, wherein, The carbon nanotube layer includes at least one carbon nanotube film, and the at least one carbon nanotube film includes multiple carbon nanotubes connected by van der Waals forces.

7. The fluid temperature field tomographic visualization detection device as described in claim 1, wherein, The carbon nanotube membrane is a super-aligned carbon nanotube membrane, which includes multiple carbon nanotubes preferentially oriented in the same direction and arranged parallel to the surface of the super-aligned carbon nanotube membrane. In the extension direction of the carbon nanotubes, the carbon nanotubes are connected end to end by van der Waals forces.

8. The fluid temperature field tomographic visualization detection device as described in claim 7, wherein, The carbon nanotube layer comprises two vertically arranged super-aligned carbon nanotube stretch films.

9. The fluid temperature field tomographic visualization detection device as described in claim 1, wherein, The carbon nanotube layer is a layered structure composed of multiple carbon nanotubes, which are arranged in parallel to form the carbon nanotube layer, or multiple carbon nanotubes are woven together to form the carbon nanotube layer.

10. An improved device for visualizing and detecting fluid temperature fields by tomography, comprising: Multiple planar temperature sensing elements are spaced apart and used to detect the temperature of a fluid cross-section. Each element includes a suspended carbon nanotube layer located in the fluid, and the carbon nanotube layer is a self-supporting structure. An infrared thermal imager is also spaced apart from the multiple planar temperature sensing elements and is used to detect the infrared signal on the surface of the suspended carbon nanotube layer and to create an image based on the infrared signal of the carbon nanotube layer.

Images