Device for measuring temperature change

Abstract

The utility model discloses a device for measuring temperature change, which comprises a mounting shell, a mounting cavity is arranged in the middle of the mounting shell, a high-expansion material is arranged at the bottom of the mounting cavity, an inclined reflective mirror is arranged on the top surface of the high-expansion material, the inclined reflective mirror is connected to the side wall of the mounting cavity in a liftable manner, and the inclined reflective mirror is connected with the mounting cavity. A plane light-transmitting mirror is arranged in the mounting cavity, the plane light-transmitting mirror is located right above the inclined reflective mirror, a wedge-shaped air thin layer used for forming interference fringes is formed between the inclined reflective mirror and the plane light-transmitting mirror, a monochromatic parallel light source is arranged at the top of the mounting cavity, and the monochromatic parallel light source is arranged right opposite to the plane light-transmitting mirror. An observation mechanism is arranged at the upper part of the mounting cavity; the utility model has the advantages of high stability, convenience and safety.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature testing, and in particular relates to a device for measuring temperature changes. Background Art

[0002] Equal thickness interference is the interference fringes formed by parallel light incident on the upper and lower surfaces of a film with varying thickness. The same order of light and dark interference fringes are formed where the film thickness is the same, so it is called equal thickness interference. For wedge interference, the fringes are parallel interference fringes with equal spacing of light and dark. If it is a Newton ring, the interference fringes are annular fringes with unequal spacing. Thick interference is the interference fringes formed by parallel light incident on the upper and lower surfaces of a film with uniform thickness variation and uniform refractive index. The same interference fringes are formed where the film thickness is the same.

[0003] Objects expand and contract due to temperature changes. The ability to change is expressed as the volume change caused by a unit temperature change under constant pressure, that is, the thermal expansion coefficient.

[0004] The linear thermal expansion coefficient is the ratio of the change in length of a solid substance when the temperature changes by 1 degree Celsius to its length at 0°C. In most cases, this coefficient is positive. That is, the volume expands as the temperature rises. However, there are exceptions. When water is between 0 and 4 degrees Celsius, it will expand inversely. Some ceramic materials have almost no change in geometric properties when the temperature rises, and their thermal expansion coefficient is close to 0.

[0005] Temperature is one of the most important physical quantities in physics. The methods and techniques of temperature measurement are very diverse. It is of great significance to industrial production, scientific research, medical diagnosis, and environmental protection. In various fields, the application of temperature measurement technology is very extensive. In industrial production, temperature measurement technology is used to control and detect parameters in the production process to ensure product quality and production safety; in the field of environmental protection, temperature measurement is used to detect changes in ambient temperature and provide data support for climate change research.

[0006] The problem with the existing technology is that common mercury thermometers are used to measure temperature. The principle of this design is based on the expansion and contraction of mercury, but the measured temperature range is limited and there is a risk of mercury leakage; the thermocouple temperature measurement method and the infrared temperature measurement method have problems with stability and test accuracy; with the development of modern technology, the temperature measurement system needs to develop in the direction of accuracy, stability and strong safety, and the existing test methods all have their own limitations. Summary of the invention

[0007] The purpose of the utility model is to provide a device for measuring temperature changes in view of the problems existing in the prior art, which has the advantages of high stability, convenience and safety.

[0008] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a device for measuring temperature changes, including a mounting shell, a mounting cavity is opened in the middle of the mounting shell, a high-expansion material is arranged at the bottom of the mounting cavity, a tilted reflector is arranged on the top surface of the high-expansion material, the tilted reflector is connected to the side wall of the mounting cavity in a liftable manner, a plane light-transmitting mirror is arranged in the mounting cavity, the plane light-transmitting mirror is located directly above the tilted reflector, a wedge-shaped air thin layer for forming interference fringes is formed between the tilted reflector and the plane light-transmitting mirror, a monochromatic parallel light source is arranged at the top of the mounting cavity, the monochromatic parallel light source is arranged directly opposite to the plane light-transmitting mirror, and an observation mechanism is arranged on the upper part of the mounting cavity.

[0009] In the above scheme, the influence of external light on the test is reduced by setting up a mounting shell, the mounting cavity is used to install internal components, and a wedge-shaped air thin layer is formed between the plane light-transmitting mirror and the inclined reflector. Under the irradiation of a monochromatic parallel light source, a certain number of interference fringes will be generated at the plane light-transmitting mirror. The number of interference fringes can be easily observed through an observation mechanism. When the temperature changes, the high-expansion material changes in volume under the influence of temperature, thereby driving the inclined reflector to rise and fall, resulting in a change in the number of interference fringes. The temperature change can be calculated based on the change in the number of interference fringes and the thermal expansion coefficient of the high-expansion material.

[0010] Furthermore, a guide rail is arranged on the side wall of the installation cavity, and a sliding groove for sliding connection with the guide rail is arranged at the edge of the inclined reflector.

[0011] By setting guide rails in up and down directions to be slidably connected with the slide groove of the tilted reflector, the tilted reflector can be moved up and down driven by the high expansion material, which is convenient for calculating the thickness change of the air layer and improving the detection accuracy.

[0012] Furthermore, the observation mechanism is obliquely arranged on the upper part of the mounting shell, and the observation mechanism includes an observation window or an electronic monitor.

[0013] The observation mechanism is tilted to facilitate observation of interference fringes at the plane light-transmitting mirror. The observation mechanism may include an observation window or an electronic monitor as required.

[0014] Furthermore, a connection hole is opened on the installation shell, and a heat-conducting material is arranged at the connection hole. The heat-conducting material includes an external detection part and a heat-conducting part. The heat-conducting part is bonded with the high-expansion material, and the external detection part is located outside the installation shell.

[0015] A connection hole is provided to position the heat-conducting material, and the outer detection portion of the heat-conducting material is used to contact the outside, transferring the temperature from the heat-conducting portion to the high-expansion material, so that the high-expansion material can sense the external temperature change.

[0016] Furthermore, a plurality of vents are provided on the installation shell, and the vents correspond to the positions of the wedge-shaped air thin layer and the high expansion material.

[0017] The vents are provided to ensure that the temperature of the thin air layer and high expansion material is consistent with the outside world.

[0018] Furthermore, a filter screen is provided on the outer surface of the mounting shell, and the position of the filter screen corresponds to the vent.

[0019] A filter is provided to prevent foreign matter from entering the installation housing and affecting the interference fringe observation.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. By utilizing the deformation characteristics of high expansion materials under the influence of temperature, combined with tilted reflectors and plane light-transmitting mirrors, the deformation of high expansion materials is converted into the change in the number of stripes, which is convenient for observation and identification, and has high test stability;

[0022] 2. The overall structure is simple, easy to use, and can be used for testing in a large temperature range; no mercury or other toxic materials are required, and it is highly safe;

[0023] 3. By using the principle of light interference and the linear expansion characteristics of high expansion materials to perform temperature testing, a new solution to the temperature testing problem is proposed;

[0024] 4. Less maintenance and upkeep, saving costs, and this design has a lot of room for size reduction, which is more conducive to the development of miniature and lightweight, and adaptable to more complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural cross-section of a device for measuring temperature changes in Example 1 of the utility model Figure 1 ;

[0026] Figure 2 This is a structural stereogram of a device for measuring temperature changes according to Example 1 of the utility model;

[0027] Figure 3 This is a structural section of a device for measuring temperature changes of the utility model Figure 2 ;

[0028] Figure 4 This is a structural cross-section of a device for measuring temperature changes in Example 2 of the utility model Figure 1 ;

[0029] Figure 5This is a structural stereogram of a device for measuring temperature changes according to Embodiment 2 of the present utility model;

[0030] In the figure: 1. Installation shell; 2. Installation cavity; 3. High expansion material; 4. Tilted reflector; 5. Flat light-transmitting mirror; 6. Wedge-shaped air thin layer; 7. Monochromatic parallel light source; 8. Electronic monitor; 9. Guide rail; 10. Slide groove; 11. Connection hole; 12. External detection part; 13. Heat conduction part; 14. Vent; 15. Filter. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative labor are within the scope of protection of the utility model. In the description of the utility model, it should be noted that the terms front, back, left, right, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the utility model product is usually placed when used. They are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0032] Example 1

[0033] like Figure 1-3 As shown, a device for measuring temperature change comprises a mounting shell 1, a mounting cavity 2 is opened in the middle of the mounting shell 1, a high expansion material 3 is arranged at the bottom of the mounting cavity 2, a tilted reflector 4 is arranged on the top surface of the high expansion material 3, the tilted reflector 4 is connected to the side wall of the mounting cavity 2 in a liftable manner, a plane light-transmitting mirror 5 is arranged in the mounting cavity 2, the plane light-transmitting mirror 5 is located directly above the tilted reflector 4, a wedge-shaped air thin layer 6 for forming interference fringes is formed between the tilted reflector 4 and the plane light-transmitting mirror 5, a monochromatic parallel light source 7 is arranged on the top of the mounting cavity 2, the monochromatic parallel light source 7 is arranged directly opposite to the plane light-transmitting mirror 5, and an observation mechanism is arranged on the upper part of the mounting cavity 2.

[0034] In the above scheme, the influence of external light on the test is reduced by setting up the installation shell 1, the installation cavity 2 is used to install internal components, and a wedge-shaped air thin layer 6 is formed between the plane light transmitting mirror 5 and the inclined reflector 4. Under the irradiation of the monochromatic parallel light source 7, a certain number of interference fringes will be generated at the plane light transmitting mirror 5. The number of interference fringes can be conveniently observed through the observation mechanism. When the temperature changes, the high expansion material 3 changes in volume under the influence of temperature, thereby driving the inclined reflector 4 to rise and fall, resulting in a change in the number of interference fringes. According to the change in the number of interference fringes and the thermal expansion coefficient of the high expansion material 3, the temperature change can be calculated.

[0035] The plane light transmitting mirror 5 and the inclined reflector 4 are made of polished glass materials. When a monochromatic parallel light beam is incident vertically on the wedge-shaped air thin layer 6 from above, thick interference fringes will be formed at the plane light transmitting mirror 5. When the temperature changes, the volume of the high expansion material 3 changes, causing the thickness d of the wedge-shaped air thin layer 6 to change, thereby causing the number n of the observed thick interference fringes to change. At this time, since the plane light transmitting mirror 5 and the inclined reflector 4 are made of low expansion coefficient materials, the deformation is negligible, and the thermal expansion coefficient of the high expansion material 3 is known. The thickness change Δd of the air thin layer can be calculated based on the change in the number of fringes Δn, and then the volume change of the material can be calculated based on the thickness change Δd of the air thin layer, and finally the temperature change can be calculated.

[0036] According to the temperature range to be tested, select appropriate component materials and set the initial air layer thickness; according to the wavelength of the monochromatic light source, set the appropriate angle of the tilted reflector 4; select a material with a small thermal expansion coefficient for the mounting housing 1 to minimize the influence of its deformation caused by temperature; the electronic monitor 8 uses a CCD camera to monitor the fringe change Δd in real time through the CCD camera and connect it to a computer for analysis.

[0037] The high expansion material 3 is bonded and fixed to the plane light-transmitting mirror 5. The high expansion material 3 can be made of rubber or graphite as required. The plane light-transmitting mirror 5 and the tilted reflector 4 can be made of low expansion materials, such as low expansion glass. The electronic monitor 8 is electrically connected to a computer.

[0038] Furthermore, a guide rail 9 is provided on the side wall of the installation cavity 2 , and a sliding groove 10 for sliding connection with the guide rail 9 is provided at the edge of the tilting reflector 4 .

[0039] By providing a guide rail 9 in the up and down direction to be slidably connected with the slide groove 10 of the tilting reflector 4, the tilting reflector 4 is driven by the high expansion material 3 to move up and down, which is convenient for calculating the thickness change of the air layer and improving the detection accuracy.

[0040] Furthermore, the observation mechanism is obliquely provided on the upper portion of the mounting shell 1 , and the observation mechanism includes an observation window or an electronic monitor 8 .

[0041] The observation mechanism is tilted to facilitate observation of interference fringes at the plane light-transmitting mirror 5 . The observation mechanism may include an observation window or an electronic monitor 8 as required.

[0042] Furthermore, a plurality of vents 14 are provided on the installation shell 1 , and the vents 14 correspond to the positions of the wedge-shaped air thin layer 6 and the high expansion material 3 .

[0043] The vent 14 is provided to facilitate the temperature of the split-shaped air thin layer 6 and the high expansion material 3 to be consistent with the outside world.

[0044] Furthermore, a filter screen 15 is disposed on the outer surface of the mounting housing 1 , and the position of the filter screen 15 corresponds to the vent 14 .

[0045] The filter 15 is provided to prevent foreign matter from entering the interior of the mounting housing 1 and affecting the interference fringe observation.

[0046] Example 2

[0047] like Figure 3-5 As shown, a device for measuring temperature change in this embodiment includes a mounting shell 1, a mounting cavity 2 is opened in the middle of the mounting shell 1, a high expansion material 3 is arranged at the bottom of the mounting cavity 2, a tilted reflector 4 is arranged on the top surface of the high expansion material 3, the tilted reflector 4 is connected to the side wall of the mounting cavity 2 in a liftable manner, a plane light transmitting mirror 5 is arranged in the mounting cavity 2, the plane light transmitting mirror 5 is located directly above the tilted reflector 4, a wedge-shaped air thin layer 6 for forming interference fringes is formed between the tilted reflector 4 and the plane light transmitting mirror 5, a monochromatic parallel light source 7 is arranged on the top of the mounting cavity 2, the monochromatic parallel light source 7 is arranged directly opposite to the plane light transmitting mirror 5, and an observation mechanism is arranged on the upper part of the mounting cavity 2.

[0048] In the above scheme, the influence of external light on the test is reduced by setting up the installation shell 1, the installation cavity 2 is used to install internal components, and a wedge-shaped air thin layer 6 is formed between the plane light transmitting mirror 5 and the inclined reflector 4. Under the irradiation of the monochromatic parallel light source 7, a certain number of interference fringes will be generated at the plane light transmitting mirror 5. The number of interference fringes can be conveniently observed through the observation mechanism. When the temperature changes, the high expansion material 3 changes in volume under the influence of temperature, thereby driving the inclined reflector 4 to rise and fall, resulting in a change in the number of interference fringes. According to the change in the number of interference fringes and the thermal expansion coefficient of the high expansion material 3, the temperature change can be calculated.

[0049] The plane light transmitting mirror 5 and the inclined reflector 4 are made of polished glass materials. When a monochromatic parallel light beam is incident vertically on the wedge-shaped air thin layer 6 from above, thick interference fringes will be formed at the plane light transmitting mirror 5. When the temperature changes, the volume of the high expansion material 3 changes, causing the thickness d of the wedge-shaped air thin layer 6 to change, thereby causing the number n of the observed thick interference fringes to change. At this time, since the plane light transmitting mirror 5 and the inclined reflector 4 are made of low expansion coefficient materials, the deformation is negligible, and the thermal expansion coefficient of the high expansion material 3 is known. The thickness change Δd of the air thin layer can be calculated based on the change in the number of fringes Δn, and then the volume change of the material can be calculated based on the thickness change Δd of the air thin layer, and finally the temperature change can be calculated.

[0050] According to the temperature range to be tested, select appropriate component materials and set the initial air layer thickness; according to the wavelength of the monochromatic light source, set the appropriate angle of the tilted reflector 4; select a material with a small thermal expansion coefficient for the mounting housing 1 to minimize the influence of its deformation caused by temperature; the electronic monitor 8 uses a CCD camera to monitor the fringe change Δd in real time through the CCD camera and connect it to a computer for analysis.

[0051] The high expansion material 3 is bonded and fixed to the plane light-transmitting mirror 5. The high expansion material 3 can be made of rubber or graphite as required. The plane light-transmitting mirror 5 and the tilted reflector 4 can be made of low expansion materials, such as low expansion glass. The electronic monitor 8 is electrically connected to a computer.

[0052] Furthermore, a guide rail 9 is provided on the side wall of the installation cavity 2 , and a sliding groove 10 for sliding connection with the guide rail 9 is provided at the edge of the tilting reflector 4 .

[0053] By providing a guide rail 9 in the up and down direction to be slidably connected with the slide groove 10 of the tilting reflector 4, the tilting reflector 4 is driven by the high expansion material 3 to move up and down, which is convenient for calculating the thickness change of the air layer and improving the detection accuracy.

[0054] Furthermore, the observation mechanism is obliquely provided on the upper portion of the mounting shell 1 , and the observation mechanism includes an observation window or an electronic monitor 8 .

[0055] The observation mechanism is tilted to facilitate observation of interference fringes at the plane light-transmitting mirror 5 . The observation mechanism may include an observation window or an electronic monitor 8 as required.

[0056] Furthermore, a connection hole 11 is opened on the installation shell 1, and a heat-conducting material is arranged at the connection hole 11. The heat-conducting material includes an external detection part 12 and a heat-conducting part 13. The heat-conducting part 13 is bonded to the high-expansion material 3, and the external detection part 12 is located on the outside of the installation shell 1.

[0057] The connection hole 11 is provided to position the heat-conducting material, and the outer detection part 12 of the heat-conducting material is used to contact the outside and transfer the temperature from the heat-conducting part 13 to the high-expansion material 3, so that the high-expansion material 3 can sense the external temperature change.

[0058] The connection hole 11 is opened on the bottom surface of the outer shell. The heat-conducting material is preferably an alloy with low expansion coefficient and high thermal conductivity, such as tungsten-copper alloy, to reduce the influence of deformation after heating. The heat-conducting part 13 is set as a sheet structure.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring temperature change, characterized in that: The invention comprises an installation shell, wherein an installation cavity is provided in the middle of the installation shell, a high expansion material is provided at the bottom of the installation cavity, an inclined reflector is provided on the top surface of the high expansion material, the inclined reflector is connected to the side wall of the installation cavity in a liftable manner, a plane light-transmitting mirror is provided in the installation cavity, the plane light-transmitting mirror is located directly above the inclined reflector, a wedge-shaped air thin layer for forming interference fringes is formed between the inclined reflector and the plane light-transmitting mirror, a monochromatic parallel light source is provided on the top of the installation cavity, the monochromatic parallel light source is provided directly opposite to the plane light-transmitting mirror, and an observation mechanism is provided on the upper part of the installation cavity.

2. The device for measuring temperature change according to claim 1, characterized in that: A guide rail is arranged on the side wall of the installation cavity, and a sliding groove for sliding connection with the guide rail is arranged at the edge of the tilted reflector.

3. The device for measuring temperature change according to claim 1, characterized in that: The observation mechanism is obliquely arranged on the upper part of the installation shell, and the observation mechanism includes an observation window or an electronic monitor.

4. The device for measuring temperature change according to claim 1, characterized in that: A connection hole is provided on the installation shell, and a heat-conducting material is arranged at the connection hole. The heat-conducting material includes an external detection part and a heat-conducting part. The heat-conducting part is attached to the high-expansion material, and the external detection part is located outside the installation shell.

5. The device for measuring temperature change according to claim 1, characterized in that: The installation shell is provided with a plurality of vents, and the vents correspond to the positions of the split-shaped air thin layer and the high expansion material.

6. The device for measuring temperature change according to claim 1, characterized in that: A filter screen is disposed on the outer surface of the mounting shell, and the position of the filter screen corresponds to the vent.

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