CN2763802Y - Microwave humidity detector - Google Patents
Microwave humidity detector Download PDFInfo
- Publication number
- CN2763802Y CN2763802Y CN 200520029812 CN200520029812U CN2763802Y CN 2763802 Y CN2763802 Y CN 2763802Y CN 200520029812 CN200520029812 CN 200520029812 CN 200520029812 U CN200520029812 U CN 200520029812U CN 2763802 Y CN2763802 Y CN 2763802Y
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- cavity
- humidity
- microwave
- utility
- gas
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- Expired - Fee Related
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model comprises a waveguide. The characteristics of the utility model: two end heads of a cylindrical resonant cavity are sealed by baffles; the resonant cavity after being sealed forms a circulation area; the baffles are provided with holes through which airflow can freely pass. The resonant cavity is measured by the resonance and turbulence of the microwave in a high Q cavity. The utility model is provided with the following effects: by using a microwave humidity measuring probe the resonant cavity proceeds with measuring the resonance frequency of the cavity to ascertain the dielectric coefficient of the gas to be measured in the cavity; continuous measurement of the humidity of the gas is realized by the functional relation among the dielectric coefficient, air temperature, air pressure and humidity of the gas; owing to zero electric field intensity on the inner surface of the high Q cavity and the insensitivity of the high Q cavity to dust and other impurity, the high Q cavity as a humidity transducer can avoid high-temperature fracture and can take humidity measurement in high temperature and hostile environment.
Description
Technical field:
The utility model relates to a kind of microwave moisture measurement probe, be specially adapted to make freeze between factory, material processed factory, industrially drying stove, moistureproof hoolivan, the continuous coverage of humidity such as warehouse.
Background technology:
At present, the sensor that people adopt moisture measurement, normally hygristor, humicap, wet and dry bulb, hair etc.These sensors in use can run into many problems.Short as operating humidity range height, environment temperature height, mission life, when attachments such as dust, oil vapour, organic steam are attached on the sensor, the insensitive even paralysis of humidity inductive etc.
The invention task:
Task of the present utility model is that to propose a kind of sensor insensitive to dust and other impurity, a kind of microwave moisture measurement probe that can continuous coverage.Task of the present utility model is done in such a way that it comprises waveguide, is characterized in that: two terminations at cylindrical cavity seal with dividing plate, and resonator cavity after the sealing forms a circulating area, have on the dividing plate to allow the freely through hole of air-flow.Resonator cavity is to measure with the disturbance of high-q cavity microwave resonance, and the hole shape of opening on the dividing plate is a crescent shape.Used material adopts metal material.The utlity model has following effect: use microwave moisture measurement probe, resonator cavity is started with from the dielectric coefficient of measuring gas to be measured in cavity resonant frequency and then the definite chamber, realize the continuous coverage of gas humidity by the funtcional relationship between gas dielectric coefficient, temperature, air pressure, the humidity, make humidity sensor with high-q cavity, because of electric field intensity on its inside surface is zero, therefore it is insensitive to dust and other impurity, and what material adopted is metal material, can avoid high temperature to destroy, do moisture measurement under high temperature and the harsh environment scenarios, more apparent its advantage.
Description of drawings:
Fig. 1 is a structural representation of the present utility model; Fig. 2 is a side diagrammatic sketch of the present utility model; Fig. 3 is a stereographic map of the present utility model.
Drawing explanation: 1, resonator cavity; 2, dividing plate; 3, crescent moon hole.
Specific embodiment:
Describe embodiment in detail in conjunction with above accompanying drawing, the resonator cavity 1 of this microwave moisture measurement probe is the high-q cavity of usefulness.Microwave resonance perturbation technique hygrometric, resonator cavity 1 is a cylindrical waveguide, two termination seals with dividing plate 2, have the hole of crescent shape 3 on the dividing plate 2, also can be split into ellipse, the hole of shapes such as oblateness, resonator cavity 1 after the sealing is a zone that can allow airflow, the material that is adopted is iron, nickel, alloy or the extremely low special alloy steel of other expansion coefficient, electric field intensity is zero on the inside surface of resonator cavity 1, this can make sensor insensitive to dust and other impurity, therefore, can carry out continuous coverage.
Claims (3)
1, microwave moisture measurement probe, it comprises waveguide, it is characterized in that: two terminations at cylindrical cavity seal with dividing plate, and the resonator cavity after the sealing forms a circulating area, has on the dividing plate to allow the freely through hole of air-flow.
2, microwave moisture measurement probe according to claim 1 is characterized in that: resonator cavity is to measure with the disturbance of high-q cavity microwave resonance, and the hole shape of opening on the dividing plate is a crescent shape.
3, microwave moisture measurement probe according to claim 1, it is characterized in that: used material adopts metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520029812 CN2763802Y (en) | 2005-01-17 | 2005-01-17 | Microwave humidity detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520029812 CN2763802Y (en) | 2005-01-17 | 2005-01-17 | Microwave humidity detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2763802Y true CN2763802Y (en) | 2006-03-08 |
Family
ID=36141345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520029812 Expired - Fee Related CN2763802Y (en) | 2005-01-17 | 2005-01-17 | Microwave humidity detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2763802Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964990A (en) * | 2015-06-03 | 2015-10-07 | 北京理工大学 | Via-hole split ring resonator (VSRR) loaded waveguide probe used for detection of defect on metal surface |
| CN108321485A (en) * | 2018-03-05 | 2018-07-24 | 华北电力大学（保定） | A kind of microwave resonance cavity and steam turbine last stage humidity detector |
| CN109884087A (en) * | 2019-04-22 | 2019-06-14 | 哈尔滨工业大学 | Based on the band-like MoO of two dimension3The highly sensitive microwave humidity sensor of nano material |
-
2005
- 2005-01-17 CN CN 200520029812 patent/CN2763802Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964990A (en) * | 2015-06-03 | 2015-10-07 | 北京理工大学 | Via-hole split ring resonator (VSRR) loaded waveguide probe used for detection of defect on metal surface |
| CN104964990B (en) * | 2015-06-03 | 2017-12-08 | 北京理工大学 | A kind of cracks of metal surface detection optical waveguide probe of via openings ring resonator loading |
| CN108321485A (en) * | 2018-03-05 | 2018-07-24 | 华北电力大学（保定） | A kind of microwave resonance cavity and steam turbine last stage humidity detector |
| CN109884087A (en) * | 2019-04-22 | 2019-06-14 | 哈尔滨工业大学 | Based on the band-like MoO of two dimension3The highly sensitive microwave humidity sensor of nano material |
| CN109884087B (en) * | 2019-04-22 | 2021-07-13 | 哈尔滨工业大学 | Based on two-dimensional banded MoO3High-sensitivity microwave humidity sensor made of nano material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |