CN2703255Y - Microwave cavity resonator in detector for detecting material quality and moisture content - Google Patents
Microwave cavity resonator in detector for detecting material quality and moisture content Download PDFInfo
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- CN2703255Y CN2703255Y CN 200420023688 CN200420023688U CN2703255Y CN 2703255 Y CN2703255 Y CN 2703255Y CN 200420023688 CN200420023688 CN 200420023688 CN 200420023688 U CN200420023688 U CN 200420023688U CN 2703255 Y CN2703255 Y CN 2703255Y
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- cavity
- microwave
- quality
- microwave cavity
- detector
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Abstract
The utility model relates to a microwave cavity resonator in the detector for detecting the material quality and moisture content. The detector comprises a microwave generator, a microwave cavity resonator, two isolating rings arranged on the front and the rear of the microwave cavity resonator, a detector amplifier, a computer and the output device of the computer. The microwave cavity resonator in the detector for detecting the material quality and moisture content is characterized in that the microwave cavity resonator comprises a cavity; the middle part of the cavity is provided with a through path which is provided with a protective sleeve along the inner wall and divides the cavity into an upper part and a lower part; the cavity wall of the upper part of the cavity is provided with a microwave input explorer, and the cavity wall of the lower part of the cavity is provided with a microwave output explorer. Accordingly, the detected material quality and moisture content can be detected by analyzing and processing the signal of the variation of the resonance curves of the microwave cavity resonator not affected by the material or affected by the material through the utility model; the microwave cavity resonator in the detector for detecting the material quality and moisture content can be suitable for the detecting for the quality and the moisture content of the high-speed online material flow, and can conduct temperature compensation after measuring the temperature of the detected material, having not any damage for the detected material and the surrounding environment; accordingly, the microwave cavity resonator in the detector for detecting the material quality and moisture content is very practical.
Description
Technical field
The utility model relates to the method and apparatus that a kind of material detects, and relates in particular to a kind of microwave cavity that is used for the pick-up unit of detection material quality and moisture.
Background technology
In scientific research and production run, the detection of material mass and moisture and control are crucial.
In the material mass detection method, detection method commonly used has weighing method and radiomaterial irradiation.Weighing method and radiomaterial irradiation characteristics and defective in actual use is:
The weighing method is to utilize various title weighing apparatus that material mass is carried out weighing, this shows, the weighing method can only be used for the static or low-speed motion of testee and be the contact occasion, the method can't detect measured matter quality (or density) distribution situation along its length, and in many production runes, need continuous detecting to go out the motion material at each instantaneous material mass that flows through and moisture;
The radiomaterial irradiation is to utilize radiomaterial (as strontium 90) that the measured matter quality is carried out weighing, this shows that the radiomaterial irradiation must have special protective device owing to used radiomaterial, as improper use, then will damage surrounding environment and personnel.
In the substance moisture content detection method, detection method commonly used has oven drying method and far infrared detection method.Oven drying method and far infrared detection method characteristics and defective in actual use is:
Oven drying method can only be used for offline inspection, and oven drying method can not detect material moisture distribution situation along its length;
The far infrared detection method can not detect material heart portion moisture exactly, and the far infrared detection method is subjected to material surface situation (as roughness) influence bigger, and the degree of accuracy that makes it to measure is not high.
Summary of the invention
The purpose of this utility model is to provide a kind of microwave cavity that is used for the pick-up unit of detection material quality and moisture, it can be at measured matter among the static or high-speed motion accurately online reliably or offline inspection go out the quality and the moisture of material.
The purpose of this utility model is achieved in that
A kind of microwave cavity that is used for the pick-up unit of detection material quality and moisture, described detection setting comprises: microwave generator, microwave cavity, be arranged on two shading rings before and after the microwave cavity, be positioned at detector amplefier and the computing machine and the output device thereof of shading ring rear side after the microwave cavity; Be characterized in:
Described microwave cavity comprises: cavity, and the cavity middle part is provided with a passage that connects, and this through channel is provided with protective sleeve along inwall, cavity is cut apart be two parts up and down; One microwave input probe is set on the cavity wall of cavity top, microwave output probe is set on the cavity wall of cavity lower part.
In the microwave cavity of the above-mentioned pick-up unit that is used for detection material quality and moisture, wherein, the described passage that is arranged on microwave cavity cavity middle part is the passage of a tubulose.
In the microwave cavity of the above-mentioned pick-up unit that is used for detection material quality and moisture, wherein, the described passage that is arranged on microwave cavity cavity middle part is the passage of a rectangle.
The utility model is used for the microwave cavity of pick-up unit of detection material quality and moisture owing to adopted above-mentioned technical scheme, makes it compared with prior art, has following advantage and good effect:
1. the utility model is owing to by microwave cavity not being subjected to material influence signal analysis and the processing that changes with the tuning curve that influenced by material, can detect the quality and the moisture of measured matter;
2. the utility model only is 10mw because microwave generator power is very little, therefore measured matter and surrounding environment is not caused any harm;
3. the utility model is owing to adopt computing machine at a high speed to carry out data processing, and therefore the control sampling interval time can be applicable to the quality of the online flow of material of high speed and the detection of moisture less than 50us;
4. the utility model can carry out doing temperature compensation behind the thermometric because the microwave signal of wave detector depends on the temperature of measured matter thus to measured matter, has overcome because the drift of the detection signal that temperature variation caused.
Description of drawings
One embodiment of the microwave cavity by the following pick-up unit that the utility model is used for detection material quality and moisture can further understand the purpose of this utility model, specific structural features and advantage in conjunction with the description of its accompanying drawing.Wherein, accompanying drawing is:
Fig. 1 is the schematic diagram that carries out the quality and the water content detection of material in the utility model with microwave;
Fig. 2 is the structural representation of the microwave cavity of the utility model pick-up unit of being used for detection material quality and moisture;
Fig. 3 is the curve map of the microwave resonance exported of the microwave cavity of the utility model pick-up unit of being used for detection material quality and moisture;
Fig. 4 is the workflow diagram that carries out the quality and the water content detection of material in the utility model with microwave.
Embodiment
See also shown in Figure 1ly, this is the schematic diagram that carries out the quality and the water content detection of material in the utility model with microwave.Among the figure, label 1 is a microwave generator, and label 3 is a microwave cavity, and measured matter 4 is arranged in microwave cavity 3, and microwave generator 1 is carried the microwave of two kinds of different frequencies to microwave cavity by computing machine 7 controls; What be provided with respectively in the both sides, front and back of microwave cavity 3 is shading ring 2 and shading ring 5, and shading ring 2 and 5 effect are to avoid interfering with each other of signal; Being positioned at behind the shading ring 5 is detector amplefier 6, the detection signal of detector amplefier 6 as calculated after machine 7 analyzing and processing by output device 8 outputs.
Please in conjunction with Fig. 1 referring to shown in Figure 2, Fig. 2 is the structural representation of microwave cavity among Fig. 1.This microwave cavity 3 comprises cavity 31, and the material of making this cavity 31 is brass H62, surface passivation; One passage 32 that connects is set at cavity 31 middle parts, this passage 32 takes on a different shape according to the difference of measured matter, it can be the passage 32 of a rectangle, in order to place measured matter be, the raw material of chemical engineering industry aspect, semi-manufacture and finished product, the powder of pharmaceuticals industry aspect, tablet and capsule, the raw material of building materials industry aspect, semi-manufacture and finished product, the raw material of food industry aspect, semi-manufacture and finished product or the like, in order to the detection and the control of online quality (density) and moisture, and in testing laboratory material is carried out off-line the quality (density) of material and moisture are detected material; What represent among Fig. 2 is the passage 32 of a tubulose, this tubular conduit 32 can be placed and is similar to circular measured matter, is used for online quality (density) and water content detection control and testing laboratory's off-line quality (density) and the moisture detection of cigarette bar that various cigarette machine rolls as tobacco industry; Along inwall one protective sleeve 33 is set at the passage 32 that connects, measured matter just is positioned at protective sleeve 33; Being provided with cavity 31 cut apart of protective sleeve 33 is up and down two parts; One microwave input probe 34 is set on cavity 31 top cavity walls, microwave output probe 35 is set on cavity 31 lower part cavity walls.
When selecting the microwave cavity physical dimension, the size of quality factor q 0 in the time of considering no-load.Q
0Computing formula as follows:
Q
0＝0.610×(λ
0/S)×{[1+0.168×(D/L)
2]
3/2/[1+0.168×(D/L)
3]}
λ in the formula
0Be the zero load of microwave resonance chamber (inverse of resonance frequency when also promptly not putting into measured matter);
S is a microwave cavity material characteristics coefficient, the acquisition of can tabling look-up;
D is the microwave cavity cavity diameter;
L is the microwave cavity cavity length;
Q
0Big more, the resolution that detects quality and moisture is high more.General Q
0Span is 39450-46500.
See also illustrated in figures 1 and 2, the utility model utilizes microwave to carry out the quality of material and the principle of water content detection is, microwave generator 1 is carried the microwave of two kinds of different frequencies to microwave cavity 3, and the quality and the moisture of measured matter is not measured in (not placing the cavity state of measured matter in the passage 32) variation of the tuning curve of (placing the stress states of measured matters in the passage 32) when influenced by material when influenced by material by measuring in the microwave cavity 3.Simultaneously, because the microwave signal of the wave detector 6 among Fig. 1 depends on the temperature of measured matter, for this reason, can carry out doing temperature compensation behind the thermometric to measured matter.
Please in conjunction with Fig. 1 and Fig. 2 referring to shown in Figure 3, Fig. 3 is the curve map of the microwave resonance exported of microwave cavity that the utility model utilizes microwave to carry out the quality of material and water content detection.Among Fig. 3, wherein:
f
0, u
0Tuning curve during for cavity (promptly not putting into measured matter).
f
1, u
1Tuning curve during for loading (promptly putting into measured matter).
f
a, f
bBe two microwave frequencies that microwave generator is carried, u
a, u
bThe output microwave signal that detects for wave detector.
Get: u
Directly=1/2 (u
a+ u
b)
u
Hand over=1/ (u
b-u
a)
U has directly reflected the quality of measured matter, and quality is big more, u
DirectlyBig more, establish the quality that m is a measured matter, then m and u
DirectlyBetween mathematical relation as follows: m=a+b * u
Directly+ c * (u
Directly)
2-m
oBe the second-order equation formula.Constant a, b, c adopt the material of known quality to demarcate the back and obtain m in the formula
oThe quality of sleeve pipe during for cavity.According to following formula, when adding measured matter in the microwave cavity, wave detector detects u
a, u
bAfter, can be in data processor in the hope of u
DirectlyAnd m, thereby measure the quality of material.
u
Hand overThe moisture that has reflected measured matter, moisture are big more, u
Hand overBig more, establish the moisture that w is a measured matter, then w and u
Hand overBetween mathematical relation as follows: w=d+e * u
Hand over+ f * (u
Hand over)
2-w
oBe the second-order equation formula, constant d, e, f adopt the material of known moisture to demarcate the back and obtain w in the formula
oThe quality of sleeve pipe during for cavity.Equally, can be in data processor in the hope of u
Hand overAnd w, thereby measure the moisture of material.
Please in conjunction with Fig. 1 to Fig. 3 referring to shown in Figure 4, Fig. 4 is that the utility model utilizes microwave to carry out the process flow diagram of the quality and the water content detection of material.
Workflow of the present utility model is:
After system start-up is finished, square-wave generator produces that dutycycle is 50%, amplitude is the control square wave of+5V, microwave source alternately produces the microwave signal of 2 different frequencies according to the control square wave, 0V corresponding to the low frequency microwave ,+5V is corresponding to high-frequency microwave, and with two kinds of microwave signals in the same time interval and the mode of continuously saltus step deliver in the microwave cavity, draw microwave signal from the opposite side of microwave cavity simultaneously.Because the quality of measured matter and moisture is different, the power of drawing microwave signal is different, and the power of signal is compared during according to the power of two signals and with cavity resonance, just can draw the quality and the moisture of measured matter in the microwave cavity.After the A/D conversion, carry out material mass and moisture calculating by computing machine, deposit storer in, and the quality of output expression material and the signal of moisture.
In sum, the utility model is owing to by microwave cavity not being subjected to material influence signal analysis and the processing that changes with the tuning curve that influenced by material, can detect the quality and the moisture of measured matter; Simultaneously, because microwave generator power is very little, therefore measured matter and surrounding environment are not caused any harm; In addition, owing to adopt the computer control sampling interval time, therefore can be applicable to the quality of the online flow of material of high speed and the detection of moisture; And, can carry out doing temperature compensation behind the thermometric to measured matter, overcome because the drift of the detection signal that temperature variation caused is therefore very practical.
Claims (3)
1. microwave cavity that is used for the pick-up unit of detection material quality and moisture, described detection setting comprises: microwave generator (1), microwave cavity (3), be positioned at the shading ring (2 and 5) that is provided with before and after the microwave cavity (3), be arranged on detector amplefier (6) and computing machine (7) and output device (8) thereof behind the shading ring (5); It is characterized in that:
Described microwave cavity (3) comprising: cavity (31), and cavity (31) middle part is provided with a passage (32) that connects, and this through channel (32) is provided with protective sleeve (33) along inwall, cavity (31) is cut apart be two parts up and down; One microwave input probe (34) is set on the cavity wall of cavity (31) top, microwave output probe (35) is set on the cavity wall of cavity (31) lower part.
2. the microwave cavity that is used for the pick-up unit of detection material quality and moisture as claimed in claim 1 is characterized in that: the described passage (32) that is arranged on microwave cavity (3) cavity (31) middle part is the passage (32) of a tubulose.
3. the microwave cavity that is used for the pick-up unit of detection material quality and moisture as claimed in claim 1 is characterized in that: the described passage (32) that is arranged on microwave cavity (3) cavity (31) middle part is the passage (32) of a rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420023688 CN2703255Y (en) | 2004-06-14 | 2004-06-14 | Microwave cavity resonator in detector for detecting material quality and moisture content |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420023688 CN2703255Y (en) | 2004-06-14 | 2004-06-14 | Microwave cavity resonator in detector for detecting material quality and moisture content |
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| Publication Number | Publication Date |
|---|---|
| CN2703255Y true CN2703255Y (en) | 2005-06-01 |
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|---|---|---|---|
| CN 200420023688 Expired - Fee Related CN2703255Y (en) | 2004-06-14 | 2004-06-14 | Microwave cavity resonator in detector for detecting material quality and moisture content |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832953A (en) * | 2010-05-31 | 2010-09-15 | 哈尔滨工程大学 | Method for measuring material moisture content and special measuring resonant cavity |
| CN102590230A (en) * | 2012-01-12 | 2012-07-18 | 天津大学 | Microwave resonant cavity sensor and measurement system for measuring concentration of solution |
| CN104931514A (en) * | 2015-06-17 | 2015-09-23 | 成都兴三为科技有限公司 | Moisture sensing system of microwave resonator cavity |
| CN107713002A (en) * | 2017-10-20 | 2018-02-23 | 红云红河烟草(集团)有限责任公司 | A kind of two-way cigarette machine for avoiding the detection of two-way microwave from interfering |
| CN108493567A (en) * | 2018-02-13 | 2018-09-04 | 浙江大学 | Adjustable Terahertz resonant cavity based on superstructure and its method for species analysis |
| CN109030517A (en) * | 2018-09-17 | 2018-12-18 | 南京航空航天大学 | Material reflectance/transmissivity real-time measurement apparatus and method in microwave heating process |
-
2004
- 2004-06-14 CN CN 200420023688 patent/CN2703255Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832953A (en) * | 2010-05-31 | 2010-09-15 | 哈尔滨工程大学 | Method for measuring material moisture content and special measuring resonant cavity |
| CN102590230A (en) * | 2012-01-12 | 2012-07-18 | 天津大学 | Microwave resonant cavity sensor and measurement system for measuring concentration of solution |
| CN104931514A (en) * | 2015-06-17 | 2015-09-23 | 成都兴三为科技有限公司 | Moisture sensing system of microwave resonator cavity |
| CN107713002A (en) * | 2017-10-20 | 2018-02-23 | 红云红河烟草(集团)有限责任公司 | A kind of two-way cigarette machine for avoiding the detection of two-way microwave from interfering |
| CN108493567A (en) * | 2018-02-13 | 2018-09-04 | 浙江大学 | Adjustable Terahertz resonant cavity based on superstructure and its method for species analysis |
| CN108493567B (en) * | 2018-02-13 | 2020-03-20 | 浙江大学 | Adjustable terahertz resonant cavity based on superstructure and method for analyzing substances by using same |
| CN109030517A (en) * | 2018-09-17 | 2018-12-18 | 南京航空航天大学 | Material reflectance/transmissivity real-time measurement apparatus and method in microwave heating process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI HENGBO AUTOMATION EQUIPMENT CO., LTD. Free format text: FORMER OWNER: SHANGHAI HENGSHANG HIGH-TECH AUTO MACHINERY CO., LTD. Effective date: 20091204 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091204 Address after: Shanghai City, East New Road Bridge No. 201 room 503, zip code: 201206 Patentee after: Shanghai HB Auto Machinery Co.,Ltd. Address before: Room 958, No. 11-301, Lingshan Road, Shanghai, Pudong New Area, 200315 Patentee before: Hengshang Automation Equipment Co., Ltd., Shanghai |
|
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI HENGBO AUTOMATION EQUIPMENT CO., LTD. Free format text: NEW ADDRESS: ROOM 503, NO.201, PUDONGXINJINQIAO ROAD, SHANGHAI CITY, ZIP CODE:201206 |
|
| CP02 | Change in the address of a patent holder |
Address after: Room 201, 503 Jinqiao Road, Shanghai, Pudong, China: 201206 Patentee after: Shanghai HB Auto Machinery Co.,Ltd. Address before: Shanghai City, East New Road Bridge No. 201 room 503, zip code: 201206 Patentee before: Shanghai HB Auto Machinery Co.,Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 201206, Room 201, 505 Jinqiao Road, Shanghai, Pudong Patentee after: Shanghai HB Auto Machinery Co.,Ltd. Address before: 201206, Room 201, 503 Jinqiao Road, Shanghai, Pudong Patentee before: Shanghai HB Auto Machinery Co.,Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050601 Termination date: 20120614 |