CN111982337A - Ultra-sensitive temperature detector - Google Patents
Ultra-sensitive temperature detector Download PDFInfo
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- CN111982337A CN111982337A CN202010895718.7A CN202010895718A CN111982337A CN 111982337 A CN111982337 A CN 111982337A CN 202010895718 A CN202010895718 A CN 202010895718A CN 111982337 A CN111982337 A CN 111982337A
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- temperature
- magnetic material
- temperature sensing
- tank body
- ultrasensitive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
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- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention provides an ultrasensitive temperature detector, wherein the side wall of a tank body is arranged on a temperature sensing part, the side wall of the tank body and the temperature sensing part enclose a tank body, and a magnetic material is arranged in the tank body; when the temperature sensing device is applied, the temperature sensing part is fixed on an object to be measured, the linearly polarized light irradiates the magnetic material in an inclined mode, an external magnetic field is applied in the direction perpendicular to the incident surface, the temperature sensing part changes the magnetic permeability of the magnetic material, the intensity of reflected light is changed, and temperature detection is achieved by detecting the intensity of the reflected light. Since the permeability of the magnetic material is significantly dependent on the temperature of the magnetic material, the temperature of the object to be measured significantly affects the kerr effect, significantly changing the intensity of the reflected light. Because the change of the reflected light can be changed to a greater extent by applying the external magnetic field, the invention has the advantage of high sensitivity and has good application prospect in the field of temperature detection.
Description
Technical Field
The invention relates to the field of temperature detection, in particular to an ultra-sensitive temperature detector.
Background
The temperature is the basic physical quantity. The detection of temperature is a common technique in engineering. Conventional temperature sensing is a temperature sensing technique based on the resistive thermal effect. The sensitivity of conventional temperature detection is low.
Disclosure of Invention
In order to solve the above problems, the present invention provides an ultra-sensitive temperature detector, comprising: the temperature sensing device comprises a temperature sensing part, a side wall of the tank body and a magnetic material, wherein the side wall of the tank body is arranged on the temperature sensing part, the side wall of the tank body and the temperature sensing part enclose the tank body, and the magnetic material is arranged in the tank body; when the temperature sensing device is applied, the linearly polarized light irradiates the magnetic material in an inclined mode, an external magnetic field is applied in the direction perpendicular to the incident surface, the temperature sensing portion changes the magnetic permeability of the magnetic material, the intensity of reflected light is changed, and temperature detection is achieved by detecting the intensity of the reflected light.
Further, the magnetic material is a magnetic fluid.
Further, the magnetic material is cobalt, bismuth iron garnet.
Furthermore, the temperature sensing device also comprises a plurality of precious metal parts, and the precious metal parts are fixed on the temperature sensing part.
Further, the height of the noble metal part is smaller than that of the magnetic material.
Further, the noble metal part is a cylinder.
Further, the noble metal part is arranged periodically.
Furthermore, the material of the side wall of the groove body is non-magnetic material.
Further, the material of the noble metal part is gold.
Further, the temperature sensing part is made of gold.
The invention has the beneficial effects that: the invention provides an ultrasensitive temperature detector, wherein the side wall of a tank body is arranged on a temperature sensing part, the side wall of the tank body and the temperature sensing part enclose a tank body, and a magnetic material is arranged in the tank body; when the temperature sensing device is applied, the temperature sensing part is fixed on an object to be measured, the linearly polarized light irradiates the magnetic material in an inclined mode, an external magnetic field is applied in the direction perpendicular to the incident surface, the temperature sensing part changes the magnetic permeability of the magnetic material, the intensity of reflected light is changed, and temperature detection is achieved by detecting the intensity of the reflected light. Since the permeability of the magnetic material is significantly dependent on the temperature of the magnetic material, the temperature of the object to be measured significantly affects the kerr effect, significantly changing the intensity of the reflected light. Because the change of the reflected light can be changed to a greater extent by applying the external magnetic field, the invention has the advantage of high sensitivity and has good application prospect in the field of temperature detection.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of an ultra-sensitive temperature probe.
FIG. 2 is a schematic diagram of yet another ultra-sensitive temperature probe.
Fig. 3 is a schematic diagram of yet another ultra-sensitive temperature probe.
In the figure: 1. a temperature sensing unit; 2. the side wall of the groove body; 3. a magnetic material; 4. a noble metal portion.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Example 1
The invention provides an ultra-sensitive temperature detector. As shown in figure 1, the ultra-sensitive temperature detector comprises a temperature sensing part 1, a tank body side wall 2 and a magnetic material 3. The side wall 2 of the tank body is arranged on the temperature sensing part 1, the side wall 2 of the tank body and the temperature sensing part 1 enclose a tank body, and the magnetic material 3 is arranged in the tank body. The material of the temperature sensing unit 1 is a good thermal conductor. The material of the tank body side wall 2 is non-magnetic material. Preferably, the material of the tank body side wall 2 is silicon dioxide. When the temperature sensing device is applied, the temperature sensing part 1 is fixed on an object to be measured, the linearly polarized light irradiates the magnetic material 3 in an inclined mode, an external magnetic field is applied in the direction perpendicular to the incident surface, the magnetic permeability of the magnetic material 3 is changed through the temperature sensing part 1, the intensity of reflected light is changed, and temperature detection is achieved through detecting the intensity of the reflected light. Because the Kerr effect is applied in the invention, the change of the reflected light can be improved to a greater extent by applying an external magnetic field, so the invention has the advantage of high sensitivity and has good application prospect in the field of temperature detection.
Further, the temperature sensing part 1 is made of gold, which is a good conductor of heat, so that heat can be transmitted from the object to be measured to the temperature sensing part 1 more effectively. In addition, the gold film can reflect incident light, a stronger electric field is formed in the magnetic material 3, the effect of the incident light and the magnetic material 3 is enhanced, the strength of the Kerr effect is improved, and the sensitivity of temperature detection is improved.
Example 2
In addition to example 1, as shown in fig. 2, the magnetic material 3 is a magnetic fluid. The ultra-sensitive temperature detector also comprises a plurality of noble metal parts 4, and the noble metal parts 4 are fixed on the temperature sensing part 1. That is, the noble metal part 4 is provided on the surface of the temperature sensing part 1. The material of the noble metal part 4 is gold. The noble metal part 4 is a cylinder. The noble metal parts 4 are arranged periodically. On the one hand, under the irradiation of incident light, the noble metal part 4 generates surface plasmon resonance to absorb more incident light, a stronger electric field is generated near the noble metal part 4, the effect of the incident light and the magnetic fluid is enhanced, and a stronger Kerr effect is generated. The intensity of the reflected light changes more when the temperature changes, thereby achieving a higher sensitivity of temperature detection.
Further, the height of the noble metal part 4 is smaller than the height of the liquid surface of the magnetic fluid. That is, the noble metal section 4 is disposed within the magnetic fluid. In this way, the scattered light from the noble metal part 4 is confined to the lower side of the liquid surface of the magnetic fluid, and a stronger electric field is generated near the noble metal part 4, thereby further enhancing the action of the incident light and the magnetic fluid, generating a stronger kerr effect, and further improving the sensitivity of temperature detection. In addition, the precious metal part 4 is a good thermal conductor, so that heat on the temperature sensing part 1 can be transferred into the magnetic fluid, the temperature of the magnetic fluid is changed more, temperature change is reflected more, and the sensitivity of temperature detection is improved.
Example 3
In addition to example 1, as shown in fig. 3, the magnetic material 3 is a solid magnetic material. Further, the magnetic material 3 is cobalt, bismuth iron garnet. The ultra-sensitive temperature detector also comprises a plurality of noble metal parts 4, and the noble metal parts 4 are fixed on the temperature sensing part 1. That is, the noble metal part 4 is provided on the surface of the temperature sensing part 1. The material of the noble metal part 4 is gold. The noble metal part 4 is a cylinder. The noble metal parts 4 are arranged periodically. Compared with embodiment 2, the solid magnetic material has a better heat conduction effect, and the temperature of the magnetic material 3 changes more when the temperature of the temperature sensing part 1 changes, so that the magnetic permeability of the magnetic material 3 can be changed more, the intensity of the kerr effect can be changed more, the intensity of the reflected light can be changed more, and finally the sensitivity of temperature detection can be improved.
Further, the height of the magnetic material 3 is larger than that of the noble metal part 4. As shown in fig. 3, the upper portion of the noble metal part 4 is free from the magnetic material 3. Corresponding to the arrangement of the holes in the magnetic material 3, the noble metal part 4 is arranged in the holes, but the holes are not filled with the noble metal part 4. Thus, incident light can be collected in the holes of the magnetic material 3 on the upper side of the noble metal part 4, and the incident light excites charge vibration in the noble metal part 4, so that stronger charge vibration is excited, a stronger electric field is generated near the noble metal part 4, the action of the incident light and the magnetic material 3 is enhanced, the kerr effect is enhanced, the intensity change of reflected light is improved, and finally, the sensitivity of temperature detection is improved.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. An ultrasensitive temperature probe, comprising: the temperature sensing device comprises a temperature sensing part, a tank body side wall and a magnetic material, wherein the tank body side wall is arranged on the temperature sensing part, the tank body side wall and the temperature sensing part enclose a tank body, and the magnetic material is arranged in the tank body; when the temperature sensing device is applied, linearly polarized light irradiates the magnetic material in an inclined mode, an external magnetic field is applied in the direction perpendicular to the incident surface, the magnetic permeability of the magnetic material is changed through the temperature sensing part, the intensity of reflected light is changed, and temperature detection is achieved through detecting the intensity of the reflected light.
2. The ultrasensitive temperature probe of claim 1, wherein: the magnetic material is magnetic fluid.
3. The ultrasensitive temperature probe of claim 1, wherein: the magnetic material is cobalt, bismuth iron garnet.
4. The ultra-sensitive temperature probe of any of claims 1-3, wherein: the temperature sensing device further comprises a plurality of precious metal parts, and the precious metal parts are fixed on the temperature sensing part.
5. The ultrasensitive temperature probe of claim 4, wherein: the height of the noble metal part is smaller than that of the magnetic material.
6. The ultrasensitive temperature probe of claim 5, wherein: the noble metal part is a cylinder.
7. The ultrasensitive temperature probe of claim 6, wherein: the noble metal sections are arranged periodically.
8. The ultrasensitive temperature probe of claim 7, wherein: the side wall of the tank body is made of nonmagnetic materials.
9. The ultrasensitive temperature probe of claim 8, wherein: the material of the noble metal part is gold.
10. The ultrasensitive temperature probe of claim 9, wherein: the temperature sensing part is made of gold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010895718.7A CN111982337A (en) | 2020-08-31 | 2020-08-31 | Ultra-sensitive temperature detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010895718.7A CN111982337A (en) | 2020-08-31 | 2020-08-31 | Ultra-sensitive temperature detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111982337A true CN111982337A (en) | 2020-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010895718.7A Withdrawn CN111982337A (en) | 2020-08-31 | 2020-08-31 | Ultra-sensitive temperature detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111982337A (en) |
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2020
- 2020-08-31 CN CN202010895718.7A patent/CN111982337A/en not_active Withdrawn
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Application publication date: 20201124 |