CN110672222A - Dielectric resonator type temperature sensor for high-temperature measurement - Google Patents
Dielectric resonator type temperature sensor for high-temperature measurement Download PDFInfo
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- CN110672222A CN110672222A CN201910953414.9A CN201910953414A CN110672222A CN 110672222 A CN110672222 A CN 110672222A CN 201910953414 A CN201910953414 A CN 201910953414A CN 110672222 A CN110672222 A CN 110672222A
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- dielectric resonator
- temperature sensor
- type temperature
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- 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
- G01K7/32—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using change of resonant frequency of a crystal
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Abstract
The invention discloses a dielectric resonator type temperature sensor for high-temperature measurement, which comprises a cylindrical dielectric resonator and a slot antenna, wherein metal patches are arranged on the upper surface and the lower surface of the dielectric resonator; the metal patch is provided with a rectangular slot antenna. The invention adopts the dielectric resonator as a sensitive element, and has the advantages of large quality factor, good planarity and higher measurement temperature range. The slot antenna is integrated with the dielectric resonator, so that the sensitivity is high, the volume is saved, and the coupling is enhanced. The temperature sensor has a simple structure and is easy to process.
Description
Technical Field
The invention relates to a temperature sensor, in particular to a novel dielectric resonator type temperature sensor.
Background
With the development and progress of science and technology, the monitoring and measuring requirements for temperature parameters are increasing in various fields such as industrial production, weapons and ammunition, aerospace and the like, and especially the acquisition of the temperature parameters in a long-time high-temperature severe environment is a problem to be solved urgently. The conventional temperature sensor is mainly divided into an active wired sensor and a passive wireless sensor, wherein the active wired sensor has the problems that the whole volume of the sensor is enlarged due to the existence of a power supply and a lead, the active wired sensor cannot be highly integrated together, cannot be installed and used in a narrow space, and simultaneously has high production cost and the waste of manpower and material resources caused by the regular replacement of the power supply; the wireless passive sensor has the obvious advantages of small volume, easy integration, no need of replacing power supply and bright research prospect.
The conventional wireless passive high-temperature sensing device mainly comprises a capacitance-inductance (LC) resonant type, a Surface Acoustic Wave (SAW) type and a microwave scattering resonance (Backscattering) type; the LC resonance type sensor has simple and reliable structure, and has the defects of lower quality factor, short test distance, easy interference of metal radiation on a coupling electric field and the like; a disadvantage of SAW type high temperature sensing structures is that the curie temperature of the piezoelectric material limits the maximum test temperature. The microwave scattering sensor overcomes the defects of the two types of sensors and has the advantages of higher test temperature, large quality factor and longer test distance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a dielectric resonator type temperature sensor for high-temperature measurement, which solves the problems that the common temperature sensor in the prior art is complex in manufacture, large in size, difficult to integrate and low in measurement temperature.
The technical scheme of the invention is as follows:
a dielectric resonator type temperature sensor for high temperature measurement comprises a cylindrical dielectric resonator and a slot antenna, wherein metal patches are arranged on the upper surface and the lower surface of the dielectric resonator; the metal patch is provided with a rectangular slot antenna.
The metal patch is copper or silver.
The dielectric resonator is made of high-temperature-resistant aluminum oxide material, the dielectric constant of the dielectric resonator is 9.8, and the loss of the dielectric resonator is 10-4。
The rectangular slot antenna 4 has a length × width of 20mm × 1mm, is 4mm from the patch center line, and is bilaterally symmetric with respect to the patch center.
The diameter × height of the dielectric substrate is 25.6 × 25.6 × 5 mm.
The diameter x diameter of the upper and lower surface metal patches is 25.6 x 25.6 mm.
The invention has the beneficial effects that:
1. the invention adopts the dielectric resonator as a sensitive element, and has the advantages of large quality factor, good planarity and higher measurement temperature range.
2. The slot antenna and the dielectric resonator are integrated, so that the sensitivity is high, the volume is saved, and the coupling is enhanced.
3. The temperature sensor has a simple structure and is easy to process.
Drawings
FIG. 1 is a schematic view of a dielectric resonator type temperature sensor according to the present invention;
FIG. 2 is a frequency response curve of a dielectric resonator type temperature sensor subjected to HFSS simulation in an embodiment;
fig. 3 is a dielectric constant-frequency relationship curve fitted to the dielectric resonator type temperature sensor in the example.
Detailed Description
In order to make the object, technical solution and beneficial effects of the present invention more clearly understood, the following detailed description is made with reference to the accompanying drawings and embodiments.
The dielectric resonator type temperature sensor of the present invention is constructed as shown in fig. 1, and is fabricated by a conventional fabrication method and conventional raw materials.
The dielectric resonator is a cylindrical dielectric resonator 1 made of high-temperature-resistant alumina, and metal patches 2 and 3 are arranged on the upper surface and the lower surface of the dielectric resonator 1;
the dielectric resonator 1 has a diameter × height of 25.6 × 25.6 × 5mm, and is made of high-temperature-resistant alumina, and has a dielectric constant of 9.8 and a loss of 10-4。
The metal patch adopts a copper sheet, the diameter multiplied by the diameter of the metal patches 2 and 3 is 25.6 multiplied by 25.6mm, wherein the metal patch 2 is provided with a rectangular slot antenna 4.
The rectangular slot antenna 4 has a length × width of 20mm × 1mm, is 4mm from the patch center line, and is bilaterally symmetric with respect to the patch center.
Fig. 2 is a frequency response curve of a simulation of the dielectric resonator type temperature sensor in the present embodiment. The figure contains 6 curves S11Curve S11Is a reflection characteristic curve. As can be seen from the reflection graph, the resonant frequency of the dielectric resonator gradually decreases (2.33GHz-2.20GHz) as the dielectric constant increases (9.8-10.8).
Fig. 3 is a dielectric constant-frequency curve fitted to the dielectric resonator-type temperature sensor in the present embodiment. As can be seen from the dielectric constant-frequency graph, the resonant frequency of the dielectric resonator gradually decreases (2.33GHz-2.20GHz) along with the increase of the dielectric constant (9.8-10.8), and a linear relation is presented, and the sensor can be used for measuring the temperature because the temperature and the dielectric constant also have a linear relation.
The invention is not limited to the embodiments described above, many variations in detail are possible without departing from the scope and spirit of the invention.
Claims (6)
1. A dielectric resonator type temperature sensor for high temperature measurement is characterized by comprising a cylindrical dielectric resonator and a slot antenna, wherein metal patches are arranged on the upper surface and the lower surface of the dielectric resonator; the metal patch is provided with a rectangular slot antenna.
2. Dielectric resonator type temperature sensor for pyrometry according to claim 1, characterized in that the dielectric resonator is a high temperature resistant alumina material with a dielectric constant of 9.8 and a loss of 10-4。
3. Dielectric resonator type temperature sensor for pyrometry according to claim 1, characterized in that the metal patch is copper or silver.
4. The dielectric resonator type temperature sensor for pyrometry according to claim 1, wherein the rectangular slot antenna 4 has a length x width of 20mm x 1mm, is 4mm from a patch center line, and is symmetrical left and right with respect to the patch center.
5. The dielectric resonator type temperature sensor for pyrometry according to claim 1, wherein the dielectric substrate has a diameter × height of 25.6 × 25.6 × 5 mm.
6. The dielectric resonator-type temperature sensor for pyrometry according to claim 1, wherein the diameter x diameter of the upper and lower surface metal patches is 25.6 x 25.6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910953414.9A CN110672222A (en) | 2019-10-09 | 2019-10-09 | Dielectric resonator type temperature sensor for high-temperature measurement |
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| CN201910953414.9A CN110672222A (en) | 2019-10-09 | 2019-10-09 | Dielectric resonator type temperature sensor for high-temperature measurement |
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| CN110672222A true CN110672222A (en) | 2020-01-10 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487155A (en) * | 2013-09-13 | 2014-01-01 | 厦门大学 | SiCN ceramic wireless passive temperature sensor and manufacturing method thereof |
| US20150028889A1 (en) * | 2013-07-24 | 2015-01-29 | University Of Central Florida Research Foundation, Inc. | Low-profile wireless passive resonators for sensing |
| CN107402031A (en) * | 2017-06-19 | 2017-11-28 | 中北大学 | Temperature, pressure biparameter sensor and preparation method based on microwave scattering principle |
| CN108267235A (en) * | 2018-01-04 | 2018-07-10 | 厦门大学 | The SiCN wireless and passives temperature sensor and preparation method of loaded patch antenna |
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2019
- 2019-10-09 CN CN201910953414.9A patent/CN110672222A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150028889A1 (en) * | 2013-07-24 | 2015-01-29 | University Of Central Florida Research Foundation, Inc. | Low-profile wireless passive resonators for sensing |
| CN103487155A (en) * | 2013-09-13 | 2014-01-01 | 厦门大学 | SiCN ceramic wireless passive temperature sensor and manufacturing method thereof |
| CN107402031A (en) * | 2017-06-19 | 2017-11-28 | 中北大学 | Temperature, pressure biparameter sensor and preparation method based on microwave scattering principle |
| CN108267235A (en) * | 2018-01-04 | 2018-07-10 | 厦门大学 | The SiCN wireless and passives temperature sensor and preparation method of loaded patch antenna |
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Application publication date: 20200110 |
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