CN105753509A - Humidity sensing ceramic, and preparation method and application thereof - Google Patents
Humidity sensing ceramic, and preparation method and application thereof Download PDFInfo
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- CN105753509A CN105753509A CN201610070974.6A CN201610070974A CN105753509A CN 105753509 A CN105753509 A CN 105753509A CN 201610070974 A CN201610070974 A CN 201610070974A CN 105753509 A CN105753509 A CN 105753509A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000919 ceramic Substances 0.000 title abstract description 11
- 230000008021 deposition Effects 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000000151 deposition Methods 0.000 claims description 34
- 239000003595 mist Substances 0.000 claims description 25
- 239000011159 matrix material Substances 0.000 claims description 14
- 239000003814 drug Substances 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 11
- 238000007738 vacuum evaporation Methods 0.000 claims description 8
- YTJSFYQNRXLOIC-UHFFFAOYSA-N octadecylsilane Chemical compound CCCCCCCCCCCCCCCCCC[SiH3] YTJSFYQNRXLOIC-UHFFFAOYSA-N 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000010849 ion bombardment Methods 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- AFUWHLXUBJOPNO-UHFFFAOYSA-N CCCCCCCCCCCCCCCC[SiH3] Chemical compound CCCCCCCCCCCCCCCC[SiH3] AFUWHLXUBJOPNO-UHFFFAOYSA-N 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 abstract description 12
- 238000005507 spraying Methods 0.000 abstract description 11
- 230000008859 change Effects 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 8
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 150000001282 organosilanes Chemical class 0.000 abstract 2
- 239000000126 substance Substances 0.000 abstract 2
- 239000000575 pesticide Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 229920001510 poly[2-(diisopropylamino)ethyl methacrylate] polymer Polymers 0.000 description 3
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 239000005739 Bordeaux mixture Substances 0.000 description 2
- 241000607479 Yersinia pestis Species 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 229910010250 TiO2—V2O5 Inorganic materials 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000361 pesticidal effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000004763 spore germination Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
- C04B41/4905—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/82—Coating or impregnation with organic materials
- C04B41/84—Compounds having one or more carbon-to-metal of carbon-to-silicon linkages
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/04—Investigating sedimentation of particle suspensions
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
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- Dispersion Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a humidity sensing ceramic and a preparation method thereof. An organosilane modification layer is arranged on the surface of a humidity sensing ceramic substrate, and the surface contact angle is 85 to 95 degrees. The organosilane is used for modifying the surface of the humidity sensing ceramic; the contact angle of fog drops deposited on the surface of the ceramic is changed; the diffusion coefficient of the fog drops on the surface of the humidity sensing ceramic is reduced. The invention also discloses a fog drop deposition sensor prepared by the humidity sensing ceramic and application of the fog drop deposition sensor to the unmanned aerial vehicle chemical spraying fog drop deposition characteristic detection. The fog drop deposition sensor provided by the invention has the advantages that information such as fog drop average particle diameter, fog drop density, fog drop covering rate and distribution uniformity can be accurately detected; meanwhile, a detection resistor reflects the relative humidity change; the fog drop deposition quantity comparison conditions of the chemical spraying specific regions can be obtained.
Description
Technical field
The present invention relates to agricultural aviation spray medicine inspection to survey and modern plant protection research field, be specifically related to a kind of humiceram and its preparation method and application.
Background technology
At present, the whole nation prevents and treats disease pest every year and uses more than 30 ten thousand tons of pesticide, more than 100 ten thousand tons of preparation.The pesticide utilization rate that the Simple compact aerosol apparatus that rural area great majority use allows to get on Target crops substantially 30%～35%, other 70%～80% pesticide drifts or be lost in non-Target crops, soil or waters.While causing resource significant wastage, also pollute the soil around farmland and water quality, environment is caused great destruction.
Pest and disease damage sudden, large-area is not only had the advantage of process real-time, quick by aerial pesticide, in complicated agricultural landform, such as rugged mountain forest, spread all in tall and big or the agricultural environment of tight plant of arranging, can also plan that work route realizes accurately spraying of medicine by GPS navigation, possess fabulous working environment adaptive capacity.Unmanned plane, in flight course, can control spot hover, and motility is strong and less costly.High concentration, efficiently, low latitude, low amounts unmanned plane pesticide application technology become the new force that China's agricultural plant protection field is strong, not only get the attention, under National agricultural policy support, more and more developed.
During the spray medicine operation of domestic unmanned plane, pesticide deposition detection means is relatively costly, and testing result is straightforward not.Effectively detection directly perceived accordingly, with respect to droplet settlement law and deposition effect is one of key technology of the anti-drift pesticide spraying of unmanned plane high concentration.
For the detection of spraying droplet sedimentation velocity, someone utilizes Phase Doppler Particle Analyzer " PDPA ", carries out in close simulation climatic chamber.The Doppler frequency shift utilizing the scattering light of the Motion Particles received obtains the velocity information of particle, and the size information of particle is tried to achieve in the phase place change of the scattering light that the different detector of utilization receives.In PDPA detection process, due to the disposable possible more than one drop by laser beam；And except drop scattering light, it is possible to also have other light, such as reflection light enters optical receiver system；And measure the Doppler frequency obtained and there is width, i.e. a Doppler frequency spectral line broadening, these are all the reasons causing " PDPA " measurement error.Unmanned plane is complicated at farmland flight environment of vehicle, and analyser volume is relatively big, is not suitable for real world applications and promotes.
For the detection of mist droplet deposition effect, commonly use water sensitive paper both at home and abroad and deposit test material as medicinal liquid.Concrete operation method is that water sensitive paper is fixed on target surface, spraying pesticide, trace can be left when pesticide droplet deposits to after in water sensitive paper, be obtained the parameters such as drop coverage rate, size droplet diameter size, droplet deposition density, the coefficient of variation by the method for image procossing.But spraying the diffusion coefficient of medicine inspection survey card and water sensitive paper due to existing aviation is about 30%, and drop easily spreads in water sensitive paper, causes test result not accurate enough, nor can obtain the deposition of specific region medicinal liquid.
The patent documentation that notification number is CN204594846U discloses a kind of mist droplet deposition sensor realizing and covering droplet amount being measured in real time, including: plate capacitors, multi-channel switch, capacitive frequency change-over circuit, frequency-voltage conversion circuit, analog to digital conversion circuit and control unit, plate capacitors includes substrate, substrate is provided with and covers copper wire group, cover copper wire group and include multiple spaced first copper cash and the second copper cash, the left end of all of first copper cash connects the first line concentration point jointly, the right-hand member of each second copper cash is connected respectively the second line concentration point, line pitch between the first adjacent copper cash and the second copper cash is 0.1mm.This utility model utilizes droplet to drop onto the change that can cause plate capacitors capacitance on plate capacitors, by by capacitance signal change be converted to can be collected voltage signal or current signal, thus realize on capacitor cover droplet amount measurement.Although this mist droplet deposition sensor can relatively accurate response Droplet deposition, but the technical parameter of the aspects such as mist droplet particle size distribution cannot be provided.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of humiceram as mist droplet deposition Characteristics Detection material, by the surface of humiceram is modified, change the mist droplet deposition contact angle when humiceram surface, reduce the droplet diffusion coefficient on humiceram surface, thus improving the accuracy of detection.
A kind of humiceram, including humiceram matrix, it is characterised in that described humiceram matrix surface has organosilan decorative layer, the contact angle on its surface is 85～95 °.
The present invention utilizes organosilan that the porous surface of humiceram matrix is modified so that it is the hygroscopicity on surface is deteriorated, and reduces the droplet diffusion at ceramic surface so that the data such as the such as droplet mean diameter that later image analysis draws are more accurate.Research proves, when the contact angle on humiceram surface Yu droplet is 85～95 °, it is possible to effectively control the diffusion of droplet, improves the accuracy rate that mist droplet particle size is measured, and reduces droplet and overlaps cause the calculating error of droplet density because of diffusion.As preferably, described organosilan is octadecylsilane or cetyl silane.
The preparation method that present invention also offers above-mentioned humiceram, comprises the following steps:
(1) humiceram matrix is carried out pretreatment；
(2) vacuum evaporation is utilized to modify organosilan at humiceram matrix surface；
(3) repeat step (2) for several times, make the contact angle on surface be maintained at 85～95 °, obtain described humiceram.
Vacuum evaporation has that equipment is simple, processing ease；Rate of film build is fast, efficiency is high；Thin film growth mechanism is simple；The advantages such as the thin film purity prepared is high, quality is good, thickness is controlled, therefore the present invention adopts the method for vacuum evaporation that humiceram surface is modified.
Silane treatment process does not produce sediment, processes the time short, controls simplicity.As preferably, described organosilan is octadecylsilane or cetyl silane.Being more highly preferred to, described organosilan is octadecylsilane, and octadecylsilane does not react with water, it is ensured that stability when test material uses.Overlay coating is white, when the mist droplet deposition with coloring agent is when its surface, develops the color distincter.
Ceramic-type humidity-sensitive material is the functionality ceramic that a quasi-resistance changes with ambient humidity, has hygrometric wide ranges, response time is short, operating temperature is a high feature, and conventional humiceram has MgCr2O4-TiO2System, TiO2-V2O5System, ZnO-Li2O-V2O5System, ZrCr2O4System and ZrO2-MgO is.As preferably, described humiceram is MgCr2O4-TiO2Series.The sheet resistance value of this material can diminish with the increase of humidity in very wide scope, and performance is more stable.
The plated film produced due to vacuum evaporation is very thin, and the apparent condition of matrix has a strong impact on the membrane structure grown on matrix and thin film physics character.In order to ensure the uniform deposition of organosilan, before finishing, need to be cleaned humiceram matrix processing.As preferably, in step (1), described pretreatment includes cleaning, destaticing and ion bom bardment.The condition of ion bom bardment: vacuum is typically in 10Pa～10-1Pa, ion bom bardment voltage 200V～1kV negative high voltage, the ion bom bardment time is 5min～30min.
As preferably, in step (2), the condition of described vacuum evaporation is: vacuum is 2 × 10-3～2 × 10-4Pa, evaporating temperature is 500～600K, sedimentation time: 50～120min.
As preferably, the number of molecule layers of organosilan finishing is 3～6 layers.
Present invention also offers a kind of mist droplet deposition sensor, including above-mentioned humiceram.Humiceram is as sensing element, the humidity change within direct feeling pottery.The sensing element of the present invention is laminated, and burns and apply electrode on thin slice, derives lead-in wire and connects conversion element, and the humidity change that sensing element is experienced by conversion element changes into exportable resistance signal, is the mist droplet deposition sensor of the present invention.The technical purpose of the present invention is except the relative humidity variations in detection humiceram, the droplet mark analysis also passing through to analyze humiceram surface deposition sprays the technical parameters such as the mean diameter of medicine droplet, droplet distribution consistency degree, droplet density, and therefore approximate or survey card less than existing spray medicine inspection size prepared into by the sensing element needs of the mist droplet deposition sensor of the present invention.
To prepare MgCr2O4-TiO2Be moisture sensor being example, traditionally ceramic process prepares MgCr2O4-TiO2It is humiceram, adopts vacuum evaporation process, to MgCr2O4-TiO2Being humiceram finishing, prepared contact angle is the sensing element of 85～95 °, burns at sensitive component surfaces and applies RuO2(ruthenic oxide) makes porous electrode.In order to not affect the analysis carrying out droplet parameter on humiceram surface, the corresponding surface in droplet detection faces arranges RuO2Electrode, is covered each by the two ends on the same surface of sensing element.Derive lead-in wire from electrode and connect measuring circuit, characterize the humiceram absorbtivity to droplet with the resistance change recorded.
Present invention also offers above-mentioned mist droplet deposition sensor and spray the application in medicine mist droplet deposition Characteristics Detection at unmanned plane.
The mist droplet deposition sensor of the present invention replaces traditional aviation spray medicine inspection survey card and is arranged on droplet collection band, after unmanned plane sprays medicinal liquid, mist droplet deposition is in humiceram detection faces, porous matrix layer absorbs drop, the dyestuff dissolved in medicinal liquid leaves mist droplet deposition vestige on humiceram surface, taken image by camera to be analyzed, can analyze and draw droplet information；Analyze increased resistance value simultaneously and weigh the amount of liquid medicine penetrated in humiceram.
The beneficial effect that the present invention possesses: (1) present invention utilizes organosilan that humiceram surface is modified, change the mist droplet deposition contact angle when ceramic surface, reduce the droplet diffusion coefficient on humiceram surface, it is possible to the information such as droplet mean diameter, droplet density, Spraying coverage and distribution consistency degree accurately detected；(2) present invention utilizes the resistance of humiceram with humidity variation characteristic, detection resistance reflection relative humidity variations, and then obtains the Droplet deposition contrast situation in spray medicine appointment region.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, but following embodiment is only the preferred embodiments of the present invention, and not all.Based on the embodiment in embodiment, those skilled in the art are obtained other embodiments under the premise not making creative work, broadly falls into protection scope of the present invention.
Embodiment 1
1, the high concentration agricultural chemical coloring treatment of aerial pesticide
Unmanned plane spray medicine need to be chosen as the custom-designed pesticidal preparations of air-spraying, this example infects for preventing and treating farmland plant antibacterial, uses Bordeaux mixture can effectively stop spore-germination, it is prevented that infection process, and can promote that leaf color is dark green, robust growth, improve tree body resistance against diseases.Because Bordeaux mixture is basic agent, Nantural non-toxic basic stain-sarranine is therefore selected to be dissolved in pesticide.
2, the finishing of humiceram
(1) treatment before plating, including cleaning plating piece and pretreatment.Clean humiceram surface to be processed with abluent, and carry out the pretreatment work destaticed.
(2) shove charge, including the cleaning of vacuum chamber cleaning and humiceram hanger, evaporation source installation, debugging, plating piece gown card.
(3) evacuation, is generally first slightly evacuated to more than 6.6Pa, opens the prime holding vacuum pump of diffusion pump earlier, heats diffusion pump, after preheating enough, opens high threshold, is evacuated to 10 with diffusion pump-2Pa half end vacuum.
(4) baking, by humiceram Baking out to 120 DEG C, dehydration.Cleaning, vacuum is 10 again-1Pa, ion bom bardment voltage 1kV negative high voltage, is 5min from the time of hitting.
(5) fritting, heating makes octadecylsilane fritting to about 300K, degasification 1min～2min.
(6) hydatogenesis, vacuum is 10-4Pa evaporating temperature keeps 500K, deposits 50min.
(7) cooling, humiceram is cooled to room temperature in vacuum chamber.
(8) come out of the stove, after pickup, close vacuum chamber, be evacuated to l × l0-1Pa, diffusion pump is cooled to allow temperature, just can close maintenance pump and cooling water.
3, material surface contact angular measurement is fixed
Utilize contact angle measurement that dyeing pesticide prepared with step 1 for the surface of modified in step 2 is carried out the measurement of contact angle, it is ensured that the contact angle that surface is 85 °-95 °.If not within the scope of this, just re-start the deposition of step 2, until meeting requirement, being finally reached the contact angle of 95 °, completing the modification of this material surface.
4, unmanned plane spray characteristics detection
Utilize unmanned plane emulation platform, dispenser course line arranges 8m length, nozzle model: VP110-015, spraying swath 3m, it is uniformly arranged 3 these invention materials on the diagonal, highly it is set to three At The Heights of crop canopies, unmanned plane during flying height is 2m, flight speed 0.1m/s, temperature: 15 DEG C, relative humidity: 56%, along airline operation complete after, collect test material, surface mist droplet deposition image is taken by CCD camera, ImageJ image processing software is utilized to obtain droplet mean diameter in image, (coefficient of variation is more big for droplet density Spraying coverage and droplet distribution consistency degree, the uniformity is more little), and read, the humidity variable quantity recording moisture sensor reflects the Droplet deposition of each height of crop canopies indirectly, using water sensitive paper as comparison.
Result is such as shown in table 1～table 5.Compared with water sensitive paper, it is little that the test material of the present invention has droplet diffusion coefficient, mist droplet particle size accuracy of detection is high, coincidence factor is low between droplet, deposition data accurately and can compare on diverse location by the relative humidity variations rate of moisture sensor, the feature such as each canopy Droplet deposition.
Table 1 droplet mean diameter
Table 2 mist droplet deposition density
Table 3 mist droplet deposition coverage rate
Table 4 mist droplet deposition distributing homogeneity
Table 5 relative humidity variations rate
Claims (10)
1. a humiceram, including humiceram matrix, it is characterised in that described humiceram matrix surface has organosilan decorative layer, and the contact angle on its surface is 85～95 °.
2. humiceram as claimed in claim 1, it is characterised in that described organosilan is octadecylsilane or cetyl silane.
3. the preparation method of humiceram as claimed in claim 1, it is characterised in that comprise the following steps:
(1) humiceram matrix is carried out pretreatment；
(2) vacuum evaporation is utilized to modify organosilan at humiceram matrix surface；
(3) repeat step (2) for several times, make the contact angle on surface be maintained at 85～95 °, obtain described humiceram.
4. preparation method as claimed in claim 3, it is characterised in that described organosilan is octadecylsilane or cetyl silane.
5. preparation method as claimed in claim 3, it is characterised in that described humiceram matrix is MgCr2O4-TiO2Series.
6. preparation method as claimed in claim 3, it is characterised in that in step (1), described pretreatment includes cleaning, destaticing and ion bom bardment.
7. preparation method as claimed in claim 3, it is characterised in that in step (2), the condition of described vacuum evaporation is: vacuum is 2 × 10-3～2 × 10-4Pa, evaporating temperature is 500～600K, and sedimentation time is 50～120min.
8. preparation method as claimed in claim 3, it is characterised in that the number of molecule layers of organosilan finishing is 3～6 layers.
9. a mist droplet deposition sensor, it is characterised in that include the humiceram described in claim 1.
10. mist droplet deposition sensor as claimed in claim 9 sprays the application in medicine mist droplet deposition Characteristics Detection at unmanned plane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610070974.6A CN105753509B (en) | 2016-02-01 | 2016-02-01 | A kind of humiceram and its preparation method and application |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442235A (en) * | 2016-09-14 | 2017-02-22 | 华南农业大学 | Pesticide droplet deposition and evaporation detection device and method |
| CN107236931A (en) * | 2017-06-22 | 2017-10-10 | 合肥汇之新机械科技有限公司 | A kind of novel metal product |
| CN109059869A (en) * | 2018-07-27 | 2018-12-21 | 仲恺农业工程学院 | Method for detecting spraying effect of plant protection unmanned aerial vehicle on fruit trees |
| CN109164022A (en) * | 2018-06-28 | 2019-01-08 | 华南农业大学 | A kind of deposition droplet volume measuring method based on the linear coplanar capacitor of length |
| CN112811925A (en) * | 2021-01-08 | 2021-05-18 | 惠州市新泓威科技有限公司 | Humidity-sensitive porous ceramic, atomizing core and preparation method thereof |
| CN113222925A (en) * | 2021-04-30 | 2021-08-06 | 陕西科技大学 | ImagePy-based water-sensitive paper fog drop parameter measuring device and measuring method thereof |
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| JPH0580013A (en) * | 1991-03-21 | 1993-03-30 | Gold Star Co Ltd | Ceramic humidity sensor and its preparation |
| CN1176696A (en) * | 1995-01-23 | 1998-03-18 | 杜拉塞尔公司 | Composite film moisture barrier for on-cell tester |
| CN102565146A (en) * | 2011-12-27 | 2012-07-11 | 郑州炜盛电子科技有限公司 | Resistance type humidity element and preparation method thereof |
| CN202393728U (en) * | 2011-12-27 | 2012-08-22 | 郑州炜盛电子科技有限公司 | Resistor type humidity-sensitive element |
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| CN106442235A (en) * | 2016-09-14 | 2017-02-22 | 华南农业大学 | Pesticide droplet deposition and evaporation detection device and method |
| CN106442235B (en) * | 2016-09-14 | 2023-03-28 | 华南农业大学 | Pesticide droplet deposition and evaporation detection device and method |
| CN107236931A (en) * | 2017-06-22 | 2017-10-10 | 合肥汇之新机械科技有限公司 | A kind of novel metal product |
| CN109164022A (en) * | 2018-06-28 | 2019-01-08 | 华南农业大学 | A kind of deposition droplet volume measuring method based on the linear coplanar capacitor of length |
| CN109059869A (en) * | 2018-07-27 | 2018-12-21 | 仲恺农业工程学院 | Method for detecting spraying effect of plant protection unmanned aerial vehicle on fruit trees |
| CN109059869B (en) * | 2018-07-27 | 2020-07-21 | 仲恺农业工程学院 | Method for detecting spraying effect of plant protection unmanned aerial vehicle on fruit trees |
| CN112811925A (en) * | 2021-01-08 | 2021-05-18 | 惠州市新泓威科技有限公司 | Humidity-sensitive porous ceramic, atomizing core and preparation method thereof |
| CN113222925A (en) * | 2021-04-30 | 2021-08-06 | 陕西科技大学 | ImagePy-based water-sensitive paper fog drop parameter measuring device and measuring method thereof |
| CN113222925B (en) * | 2021-04-30 | 2023-01-31 | 陕西科技大学 | ImagePy-based water-sensitive paper fog drop parameter measuring device and measuring method thereof |
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