CN203949881U - Self-adjusting microwave cavity line measuring system for moisture content - Google Patents
Self-adjusting microwave cavity line measuring system for moisture content Download PDFInfo
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- CN203949881U CN203949881U CN201420059153.9U CN201420059153U CN203949881U CN 203949881 U CN203949881 U CN 203949881U CN 201420059153 U CN201420059153 U CN 201420059153U CN 203949881 U CN203949881 U CN 203949881U
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Abstract
The utility model discloses a kind of self-adjusting microwave cavity line measuring system for moisture content, it is characterized in that: comprise tunable microwave resonator, microwave detection system and computer processing system, tunable microwave resonator is made up of with motor turntable and trigger microwave cavity, grating, trigger output terminal is connected with microwave cavity, and grating is installed in same axis is relative with motor turntable and microwave cavity; Microwave detection system is made up of microwave reflection mirror, diffuse reflector and thermal imaging system, and microwave reflection mirror receives the microwave from microwave cavity, and microwave reflection mirror is by the microwave reflection receiving to diffuse reflector, and thermal imaging system gathers the diffuse reflection picture of diffuse reflector; Computer processing system is made up of control circuit board, motor servo driver, image pick-up card and computing machine, the output terminal of control circuit board is connected with motor servo driver with trigger, the output terminal of motor servo driver is connected with motor turntable with grating, control circuit board and image pick-up card and computer bidirectional communication connection, the input end of image pick-up card is connected with the output terminal of thermal imaging system, computing machine.The utility model is reasonable in design, measurement range is wide, precision is high, dirigibility is good, can realize Paper Moisture on-line measurement, efficiently solves the deficiencies in the prior art.
Description
Technical field
The utility model relates to a kind of microwave detection system, especially relates to a kind of self-adjusting microwave cavity line measuring system for moisture content.
Background technology
Microwave is a kind of frequency electromagnetic waves, and the absorption of material to microwave and reflecting properties depend primarily on the compound dielectric of material.At microwave frequency band, the specific inductive capacity of water is far longer than other solid matter material, in the time that microwave passes through hydrous matter, the loss of the microwave energy being caused by moisture is much larger than the caused loss of other dry, water cut in material will affect its compound dielectric significantly, measure the physical quantitys relevant to specific inductive capacity such as microwave power decay by material, phase place variation, resonance frequency, water percentage that just can measurement of species, this is the measuring principle of microwave moisture instrument.
The water cut of applied microwave commercial measurement material, real-time Measurement accuracy online, and it is convenient to process, good reliability, antijamming capability is strong, is not vulnerable to the impact of color, the structure etc. of material in measuring process, and the moisture of detectable substance inside, measurement result has more representativeness, therefore has broad application prospects.
It is a kind of field that water content detection is had relatively high expectations that Paper Moisture detects, because the applied range of paper, purposes is many, especially strict to the water cut accuracy requirement of paper at some special dimensions, such as cigarette paper using, calligraphy and drawing paper using etc., develop high precision novel sensor, develop more accurately, stablize and the wide instrument of measurement range, have great importance.The method that paper water percentage detects at present mainly contains densimetry, capacitance method, shortwave absorption process, microwave method etc., but said method detection effect is undesirable.
Therefore, research wide region, precision is high, dirigibility good, the microwave method Paper Moisture measurement mechanism that can realize on-line measurement is significant.
Utility model content
Technical problem to be solved in the utility model is: a kind of self-adjusting microwave cavity line measuring system for moisture content is provided, it designs by close-loop feedback, adopt computer control grating and motor turntable automatically to adjust orientation, make the microwave of microwave cavity output best quality, reach the object of accurate detection Paper Moisture.The utility model is reasonable in design, measurement range is wide, precision is high, dirigibility is good, can realize Paper Moisture on-line measurement, efficiently solves the deficiencies in the prior art.
For solving the problems of the technologies described above, the technical solution of the utility model is: self-adjusting microwave cavity line measuring system for moisture content, it is characterized in that: comprise tunable microwave resonator, microwave detection system and computer processing system, described tunable microwave resonator is made up of with motor turntable and trigger microwave cavity, grating, described trigger output terminal is connected with microwave cavity, and described grating is installed in same axis is relative with motor turntable and microwave cavity; Described microwave detection system is made up of microwave reflection mirror, diffuse reflector and thermal imaging system, described microwave reflection mirror receives the microwave from microwave cavity, described microwave reflection mirror is by the microwave reflection receiving to diffuse reflector, and thermal imaging system gathers the diffuse reflection picture of diffuse reflector; Described computer processing system is made up of control circuit board, motor servo driver, image pick-up card and computing machine, described control circuit board output terminal be connected with motor servo driver with trigger, the output terminal of described motor servo driver is connected with motor turntable with grating, described control circuit board and image pick-up card and computer bidirectional communication connection, the input end of described image pick-up card is connected with the output terminal of thermal imaging system, computing machine.
Above-mentioned self-adjusting microwave cavity line measuring system for moisture content, is characterized in that: described microwave cavity is a kind of open circuit microwave coaxial resonator.
Above-mentioned self-adjusting microwave cavity line measuring system for moisture content, is characterized in that: the grating first-order diffraction rate of described grating and motor turntable is 95%.
Above-mentioned self-adjusting microwave cavity line measuring system for moisture content, is characterized in that: described grating and motor turntable have directly been controlled and rotated and location by motor servo driver.
Above-mentioned self-adjusting microwave cavity line measuring system for moisture content, is characterized in that: the microwave pulse that described trigger control microwave cavity is sent and the timing synchronization of thermal imaging system.
Adopted technique scheme, the beneficial effects of the utility model are:
1, the utility model designs by close-loop feedback, adopts computer control grating and motor turntable automatically to adjust orientation, makes the microwave of microwave cavity output best quality, reaches the object of accurate detection Paper Moisture.
2, the utility model, because be provided with grating and the motor turntable control microwave cavity output microwave of hands-off tuning, can effectively overcome signal source amplitude stability and space and disturb the impact on measuring accuracy.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the resonator cavity equivalence single-tunded circuit model of the utility model embodiment.
Wherein: 1, microwave cavity; 2, grating and motor turntable; 3, microwave reflection mirror;
4, diffuse reflector; 5, thermal imaging system; 6, trigger; 7, control circuit board;
8, motor servo driver; 9, image pick-up card; 10, computing machine.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As shown in Figure 1, self-adjusting microwave cavity line measuring system for moisture content, it is characterized in that: comprise tunable microwave resonator, microwave detection system and computer processing system, described tunable microwave resonator is made up of with motor turntable 2 and trigger 6 microwave cavity 1, grating, described trigger 6 output terminals are connected with microwave cavity 1, and described grating is installed in same axis is relative with motor turntable 2 and microwave cavity 1; Described microwave detection system is made up of microwave reflection mirror 3, diffuse reflector 4 and thermal imaging system 5, described microwave reflection mirror 3 receives the microwave from microwave cavity 1, described microwave reflection mirror 3 is by the microwave reflection receiving to diffuse reflector 4, and thermal imaging system 5 gathers the diffuse reflection picture of diffuse reflector 4; Described computer processing system is made up of control circuit board 7, motor servo driver 8, image pick-up card 9 and computing machine 10, described control circuit board 7 output terminal be connected with motor servo driver 8 with trigger 6, the output terminal of described motor servo driver 8 is connected with motor turntable 2 with grating, described control circuit board 7 is connected with image pick-up card 9 and computing machine 10 two-way communications, and the input end of described image pick-up card 9 is connected with the output terminal of thermal imaging system 5, computing machine 10.
In the present embodiment, described microwave cavity 1 is a kind of open circuit microwave coaxial resonator.
In the present embodiment, the grating first-order diffraction rate of described grating and motor turntable 2 is 95%.
In the present embodiment, described grating and motor turntable 2 have directly been controlled and have been rotated and location by motor servo driver 8.
In the present embodiment, described trigger 6 is controlled microwave pulse that microwave cavity 1 sends and the timing synchronization of thermal imaging system 5.
As shown in Figure 2; it is resonator cavity equivalence single-tunded circuit model; wherein L, G, C0, C1, C2 are equivalent to respectively the impact of inductance, internal loss, internal capacitance, over cap and the sample of resonator cavity; lot of experiments proves that Paper Moisture is the nonlinear function about resonator cavity three dB bandwidth b and resonance frequency f, just can indirectly measure the content of Paper Moisture by the characteristic of analytic function.
First computing machine 10 is given an order, providing signal by control circuit board 7 controls direct drive AC servomotor by motor servo driver 8 and drives grating motor turntable 2 to turn to the theoretical position of a certain spectral line, near extract thermal imaging system 5 by image pick-up card 9 in a small angle range this position field sync signal triggers microwave cavity 1 by control circuit board 7 and launches one group of microwave pulse, this group pulse is arrived diffuse reflector 4 by microwave reflection mirror 3, thermal imaging system 5 collects its diffuse reflection picture, and deposit hard disc of computer in by image pick-up card 9, by developed hot spot discriminating software, result is differentiated and fed back to this group hot spot, drive grating motor turntable 2 to the output best position of microwave by direct drive AC servomotor, can complete the automatic adjustment to tunable microwave resonator cavity, to realize the optimum measurement of sample moisture.
The utility model is not limited to above-mentioned concrete embodiment, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done, within all dropping on protection domain of the present utility model.
Claims (5)
1. self-adjusting microwave cavity line measuring system for moisture content, it is characterized in that: comprise tunable microwave resonator, microwave detection system and computer processing system, described tunable microwave resonator is made up of with motor turntable (2) and trigger (6) microwave cavity (1), grating, described trigger (6) output terminal is connected with microwave cavity (1), and described grating is installed in same axis is relative with motor turntable (2) and microwave cavity (1), described microwave detection system is made up of microwave reflection mirror (3), diffuse reflector (4) and thermal imaging system (5), described microwave reflection mirror (3) receives the microwave from microwave cavity (1), described microwave reflection mirror (3) is upper to diffuse reflector (4) by the microwave reflection receiving, and thermal imaging system (5) gathers the diffuse reflection picture of diffuse reflector (4), described computer processing system is by control circuit board (7), motor servo driver (8), image pick-up card (9) and computing machine (10) composition, described control circuit board (7) output terminal be connected with motor servo driver (8) with trigger (6), the output terminal of described motor servo driver (8) is connected with motor turntable (2) with grating, described control circuit board (7) is connected with image pick-up card (9) and computing machine (10) two-way communication, the input end of described image pick-up card (9) and thermal imaging system (5), the output terminal of computing machine (10) connects.
2. self-adjusting microwave cavity line measuring system for moisture content according to claim 1, is characterized in that: described microwave cavity (1) is a kind of open circuit microwave coaxial resonator.
3. self-adjusting microwave cavity line measuring system for moisture content according to claim 1, is characterized in that: the grating first-order diffraction rate of described grating and motor turntable (2) is 95%.
4. self-adjusting microwave cavity line measuring system for moisture content according to claim 1, is characterized in that: described grating and motor turntable (2) have directly been controlled and rotated and location by motor servo driver (8).
5. the self-adjusting microwave cavity line measuring system for moisture content of one according to claim 1, is characterized in that: the microwave pulse that described trigger (6) control microwave cavity (1) is sent and the timing synchronization of thermal imaging system (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420059153.9U CN203949881U (en) | 2014-02-08 | 2014-02-08 | Self-adjusting microwave cavity line measuring system for moisture content |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420059153.9U CN203949881U (en) | 2014-02-08 | 2014-02-08 | Self-adjusting microwave cavity line measuring system for moisture content |
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| CN203949881U true CN203949881U (en) | 2014-11-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798925A (en) * | 2019-01-15 | 2019-05-24 | 太原理工大学 | A kind of adjustable matched FBG demodulating equipment of range |
| GB2569215A (en) * | 2017-10-18 | 2019-06-12 | Boeing Co | Synchronized phased array and infrared detector system for moisture detection |
| US10422742B2 (en) | 2017-10-18 | 2019-09-24 | The Boeing Company | Moisture detection system |
| CN110455829A (en) * | 2019-08-19 | 2019-11-15 | 电子科技大学 | High-Power Microwave is to the non-thermal influencing mechanism extraction system of dielectric substance and method |
-
2014
- 2014-02-08 CN CN201420059153.9U patent/CN203949881U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2569215A (en) * | 2017-10-18 | 2019-06-12 | Boeing Co | Synchronized phased array and infrared detector system for moisture detection |
| US10422742B2 (en) | 2017-10-18 | 2019-09-24 | The Boeing Company | Moisture detection system |
| GB2569215B (en) * | 2017-10-18 | 2020-04-29 | Boeing Co | Synchronized phased array and infrared detector system for moisture detection |
| US10656081B2 (en) | 2017-10-18 | 2020-05-19 | The Boeing Company | Synchronized phased array and infrared detector system for moisture detection |
| CN109798925A (en) * | 2019-01-15 | 2019-05-24 | 太原理工大学 | A kind of adjustable matched FBG demodulating equipment of range |
| CN109798925B (en) * | 2019-01-15 | 2021-01-19 | 太原理工大学 | Range-adjustable matched grating demodulation device |
| CN110455829A (en) * | 2019-08-19 | 2019-11-15 | 电子科技大学 | High-Power Microwave is to the non-thermal influencing mechanism extraction system of dielectric substance and method |
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Granted publication date: 20141119 |