CN111537093A - Temperature detector based on microstrip antenna - Google Patents
Temperature detector based on microstrip antenna Download PDFInfo
- Publication number
- CN111537093A CN111537093A CN202010439022.3A CN202010439022A CN111537093A CN 111537093 A CN111537093 A CN 111537093A CN 202010439022 A CN202010439022 A CN 202010439022A CN 111537093 A CN111537093 A CN 111537093A
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- China
- Prior art keywords
- microstrip antenna
- thermal expansion
- terminal
- expansion material
- resonance frequency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K5/00—Measuring temperature based on the expansion or contraction of a material
- G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
- G01K5/50—Measuring temperature based on the expansion or contraction of a material the material being a solid arranged for free expansion or contraction
- G01K5/52—Measuring temperature based on the expansion or contraction of a material the material being a solid arranged for free expansion or contraction with electrical conversion means for final indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention provides a temperature detector based on a microstrip antenna, wherein a thermal expansion material is arranged below a protruding part of a first microstrip antenna, when the temperature detector is used, a high-frequency field is applied, the thermal expansion material absorbs heat to expand in an environment to be detected, the coupling between the first microstrip antenna and a second microstrip antenna is changed, the resonance frequency between a first terminal and a second terminal is changed, and the environment temperature measurement is realized by detecting the resonance frequency. The resonance frequency of the micro-nano structure is very sensitive to the morphology of the structure, so the method has the advantage of high sensitivity. In addition, when the temperature sensor is placed in a closed space, a high-frequency field is applied outside the closed space, temperature detection is realized through the resonance frequency of the detection antenna, the use is convenient, and the temperature sensor has a good application prospect in the field of temperature detection.
Description
Technical Field
The invention relates to the field of temperature detection, in particular to a temperature detector based on a microstrip antenna.
Background
Temperature measurement and monitoring has important applications in various fields of production and life. When the traditional temperature sensor is used for detecting the temperature of the closed space, a circuit or a light path is needed to excite a sensitive element in the closed space, and the system is complex. In addition, although the temperature detector based on the optical principle has high sensitivity, the cost is relatively high; although temperature probes based on changes in the conductive properties are less costly, the sensitivity is also relatively low.
Disclosure of Invention
In order to solve the problems, the invention provides a temperature detector based on a microstrip antenna, which comprises an insulating substrate, a first microstrip antenna, a second microstrip antenna, a first wiring end and a second wiring end, wherein the first microstrip antenna, the second microstrip antenna, the first wiring end and the second wiring end are arranged on the insulating substrate; when the device is used, a high-frequency field is applied, the thermal expansion material absorbs heat to expand in an environment to be measured, the coupling between the first microstrip antenna and the second microstrip antenna is changed, the resonance frequency between the first wiring end and the second wiring end is changed, and the ambient temperature measurement is realized by detecting the resonance frequency.
Further, the split ring is rectangular and the protrusion is rectangular.
Further, the distance between the first microstrip antenna and the second microstrip antenna is less than 10 microns.
Furthermore, the materials of the first microstrip antenna and the second microstrip antenna are gold, copper, platinum and carbon.
Further, the insulating substrate is silicon dioxide or glass.
Further, a thermally expansive material is disposed under the first microstrip antenna.
Further, a thermally expansive material is disposed inside the split ring, and the first microstrip antenna is disposed on the thermally expansive material.
The invention has the beneficial effects that: the invention provides a temperature detector based on a microstrip antenna, wherein a thermal expansion material is arranged below a protruding part of a first microstrip antenna, when the temperature detector is used, a high-frequency field is applied, the thermal expansion material absorbs heat to expand in an environment to be detected, the coupling between the first microstrip antenna and a second microstrip antenna is changed, the resonance frequency between a first terminal and a second terminal is changed, and the environment temperature measurement is realized by detecting the resonance frequency. The resonance frequency of the micro-nano structure is very sensitive to the morphology of the structure, so the method has the advantage of high sensitivity. In addition, when the temperature sensor is placed in a closed space, a high-frequency field is applied outside the closed space, temperature detection is realized through the resonance frequency of the detection antenna, the use is convenient, and the temperature sensor has a 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 a microstrip antenna based temperature probe.
In the figure: 1. a first microstrip antenna; 2. a second microstrip antenna; 11. a first terminal; 12. a protrusion; 21 a second terminal; 22. and (4) opening.
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 a temperature detector based on a microstrip antenna, which comprises an insulating substrate, a first microstrip antenna 1, a second microstrip antenna 2, a first terminal 11 and a second terminal 21. The materials of the first microstrip antenna 1, the second microstrip antenna 2, the first terminal 11 and the second terminal 21 are gold, copper, platinum and carbon. The insulating substrate is silicon dioxide or glass. The first microstrip antenna 1, the second microstrip antenna 2, the first terminal 11, and the second terminal 21 are disposed on an insulating substrate. As shown in fig. 1, one end of the second microstrip antenna 2 is connected to the second terminal 21, and the other end of the second microstrip antenna 2 is connected to the open ring. The split ring is provided with an opening 22. The first microstrip antenna 1 penetrates the opening 22. The first microstrip antenna 1 has an outer end of the open loop connected to the first terminal 11, and a protrusion 12 is disposed at an inner end of the open loop of the first microstrip antenna 1. A thermally expansive material is disposed under the projection 12.
When the high-frequency field acquisition device is used, a high-frequency field is applied to the first microstrip antenna 1 and the second microstrip antenna 2, the signal acquisition device is connected with the first wiring end 11 and the second wiring end 21, and the responses of the first microstrip antenna 1 and the second microstrip antenna 2 to external high-frequency field signals are acquired. In an environment to be measured, the thermal expansion material absorbs heat to expand, coupling between the first microstrip antenna 1 and the second microstrip antenna 2 is changed, the resonance frequency of signals collected between the first wiring end 11 and the second wiring end 21 is changed, and environment temperature measurement is achieved by detecting the resonance frequency. The resonance frequency of the micro-nano structure is very sensitive to the morphology of the structure, particularly to the distance between the structures, so the method has the advantage of high sensitivity. In addition, when the temperature sensor is placed in a closed space, a high-frequency field is applied outside the closed space, temperature detection is realized through the resonance frequency of the detection antenna, the use is convenient, and the temperature sensor has a good application prospect in the field of temperature detection.
Furthermore, the microstrip antenna simultaneously emits scattered electromagnetic waves, and the resonance frequency of the microstrip antenna can be measured in a wireless mode, so that the temperature of the closed space can be measured more conveniently.
Further, the split ring is rectangular and the projection 12 is rectangular. That is to say the projections 12 match the shape of the split ring so that the projections 12 fit more snugly with the split ring, with a smaller distance between them. Thus, when the thermal expansion material expands, the distance between the two is largely changed, the resonance frequency is largely changed, and temperature detection with higher sensitivity can be realized.
Further, the distance between the first microstrip antenna 1 and the second microstrip antenna 2 is less than 10 microns. Preferably, the distance between the first microstrip antenna 1 and the second microstrip antenna 2 is less than 1 micron. Thus, when the thermal expansion material expands, the change in the distance between the two is relatively larger, the resonance frequency moves relatively more, and the sensitivity of temperature detection is higher.
Example 2
In addition to embodiment 1, a thermal expansion material is provided under the first microstrip antenna 1. That is, a thermal expansion material is provided under the entire first microstrip antenna 1 except for the thermal expansion material provided under the protruding portion 12. In this way, when the thermal expansion material expands endothermically, the distance between the split ring and the first microstrip antenna 1 is changed at the opening 22 as well as the distance between the split ring and the projection 12 at the projection 12, so that the microstrip antenna is more sensitive to temperature changes and has higher sensitivity for detecting temperature.
Example 3
In addition to embodiment 1, a thermal expansion material is provided inside the open ring, and the first microstrip antenna 1 is provided on the thermal expansion material. That is, the thermally expansive material is provided throughout the inside of the split ring, and in embodiment 1, the thermally expansive material is provided only under the protrusion 12. When the thermal expansion material is arranged inside the whole open ring and the first microstrip antenna 1 is arranged on the thermal expansion material, the expansion of the thermal expansion material brings about two effects, on one hand, the thermal expansion material causes the protrusion 12 or the bulge of the first microstrip antenna 1, so that the distance between the protrusion 12 or the first microstrip antenna 1 and the open ring is increased; on the other hand, the thermal expansion material causes the open ring to expand outwards, i.e. to enlarge the size of the open ring, also causing the distance between the projection 12 or the first microstrip antenna 1 and the open ring to increase. Both of the two effects increase the distance between the first microstrip antenna 1 and the second microstrip antenna 2, so that the coupling between the first microstrip antenna 1 and the second microstrip antenna 2 can be changed greatly, the resonance frequency is changed more, and the sensitivity of temperature detection in the technical scheme in this embodiment is higher.
In addition, the thermal expansion material is arranged in the whole split ring, so that the experimental difficulty is lower than that of only arranging the thermal expansion material below the protruding part 12, and the experimental difficulty is reduced.
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 (7)
1. A microstrip antenna based temperature probe comprising: the antenna comprises an insulating substrate, a first microstrip antenna, a second microstrip antenna, a first terminal and a second terminal, wherein the first microstrip antenna, the second microstrip antenna, the first terminal and the second terminal are arranged on the insulating substrate, one end of the second microstrip antenna is connected with the second terminal, the other end of the second microstrip antenna is connected with an open ring, the open ring is provided with an opening, the first microstrip antenna penetrates through the opening, the outer end of the open ring of the first microstrip antenna is connected with the first terminal, one end in the open ring of the first microstrip antenna is a protruding part, and a thermal expansion material is arranged below the protruding part; when the temperature measuring device is used, a high-frequency field is applied, the thermal expansion material absorbs heat to expand in an environment to be measured, the coupling between the first microstrip antenna and the second microstrip antenna is changed, the resonance frequency between the first wiring end and the second wiring end is changed, and the ambient temperature measurement is realized by detecting the resonance frequency.
2. A microstrip antenna based temperature probe according to claim 1 wherein: the split ring is rectangular, and the protruding portion is rectangular.
3. A microstrip antenna based temperature probe according to claim 2 wherein: the distance between the first microstrip antenna and the second microstrip antenna is less than 10 microns.
4. A microstrip antenna based temperature probe according to claim 3 wherein: the first microstrip antenna and the second microstrip antenna are made of gold, copper, platinum and carbon.
5. A microstrip antenna based temperature probe according to claim 4 wherein: the insulating substrate is silicon dioxide or glass.
6. A microstrip antenna based temperature probe according to any of claims 1-5 wherein: and a thermal expansion material is arranged below the first microstrip antenna.
7. A microstrip antenna based temperature probe according to any of claims 1-5 wherein: and a thermal expansion material is arranged in the split ring, and the first microstrip antenna is arranged on the thermal expansion material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010439022.3A CN111537093A (en) | 2020-05-22 | 2020-05-22 | Temperature detector based on microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010439022.3A CN111537093A (en) | 2020-05-22 | 2020-05-22 | Temperature detector based on microstrip antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111537093A true CN111537093A (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010439022.3A Withdrawn CN111537093A (en) | 2020-05-22 | 2020-05-22 | Temperature detector based on microstrip antenna |
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| Country | Link |
|---|---|
| CN (1) | CN111537093A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112835130A (en) * | 2020-12-29 | 2021-05-25 | 北京邮电大学 | Weather state detection method and device and electronic equipment |
-
2020
- 2020-05-22 CN CN202010439022.3A patent/CN111537093A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112835130A (en) * | 2020-12-29 | 2021-05-25 | 北京邮电大学 | Weather state detection method and device and electronic equipment |
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Application publication date: 20200814 |