CN203772784U - Frictional electricity-based ethanol sensor - Google Patents
Frictional electricity-based ethanol sensor Download PDFInfo
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- CN203772784U CN203772784U CN201420128198.7U CN201420128198U CN203772784U CN 203772784 U CN203772784 U CN 203772784U CN 201420128198 U CN201420128198 U CN 201420128198U CN 203772784 U CN203772784 U CN 203772784U
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model provides a frictional electricity-based ethanol sensor, comprising a first electrode layer, an isolation layer and a second electrode layer, which are sequentially stacked, wherein the first electrode layer comprises a first electrode and a first high-molecular polymer insulating layer; the first high-molecular polymer insulating layer is arranged on the side surface of the first electrode towards the second electrode layer; the isolation layer comprises at least one cavity; the first electrode layer and the second electrode layer are in contact friction through the cavity; the second electrode layer further comprises a second electrode; at least one through hole is also formed in the upper surface of the first electrode layer or the second electrode layer, and corresponds to the position of the cavity; the through hole is used for inputting and outputting of ethanol; the first high-molecular polymer insulating layer and two opposite side surfaces in the second electrode are taken as friction interfaces of the ethanol sensor; the first electrode and the second electrode are taken as signal output ends of the ethanol sensor. The ethanol sensor is simple in structure, low in cost, simple in fabrication process, high in sensitivity, and applicable to large-scale popularization and application.
Description
Technical field
The utility model relates to a kind of ethanol sensor, relates in particular to a kind of based on the electric ethanol sensor of friction.
Background technology
Ethanol sensor socially and industrial application a lot, if traffic-police is for the test driver hand-held tester for alcohol concentration whether drunk driving is used, in fermentation industry, realize that by the alcohol content in on-line testing fermentation liquor sweat is controlled automatically etc.Along with social progress, motor vehicles grow with each passing day, and motor vehicle driving personnel " drive when intoxicated " and " drunk driving " road traffic accident very easily occurs, serious harm traffic safety and people life property safety.After people drinks, alcohol is absorbed by the body by digestive system, through blood circulation, approximately has 90% alcohol by lung's discharges of exhaling, and therefore the alcohol content in measurement expiration, just can judge its drunk degree.
What existing ethanol sensor generally adopted is the alcohol sensor of MOS type, not only complex structure, and manufacture craft is loaded down with trivial details, and the cost price of whole sensor is high, can not generally be suitable for vast colony.Therefore a kind of accuracy of detection ethanol sensor high, simple in structure and with low cost is provided is major issue urgently to be resolved hurrily.
Utility model content
It is a kind of based on the electric ethanol sensor of friction that the utility model provides, the wettability of utilizing high molecular polymer insulation course to have ethanol, can be for detection of concentration of alcohol, solve loaded down with trivial details, the with high costs problem of ethanol sensor manufacture craft of the prior art.
It is a kind of based on the electric ethanol sensor of friction that the utility model provides, and comprises the first electrode layer, separation layer and the second electrode lay that are cascading.The first electrode layer comprises the first electrode and the first high molecular polymer insulation course, and the first high molecular polymer insulation course is arranged on the first electrode on the side surface of the second electrode lay.Separation layer has at least one cavity, and the first electrode layer and described the second electrode lay are by described cavity contact friction; The second electrode lay further comprises the second electrode.The first electrode layer or be also provided with at least one through hole above the second electrode lay, through hole and empty cavity position correspondence, through hole is for the input and output of ethanol.The first high molecular polymer insulation course and two side surfaces relative in the second electrode frictional interface as described ethanol sensor, the first electrode and the second electrode are as the signal output part of ethanol sensor.
Of the present utility model based on the electric ethanol sensor of friction, utilize, as the high molecular polymer insulation course of frictional interface, ethanol is had to wettability, thereby by the Ethanol Adsorption in cavity at surface of insulating layer, affect the output voltage of sensor, the output voltage of this ethanol sensor and ethanol volume change are certain linear relationship.And by separation layer being set between the first electrode layer and the second electrode lay, the contact separation that improves frictional interface on the one hand, on separation layer, be formed on the other hand polygon cavity or spirality cavity that alcohol vapour or liquid inject and stores, thereby ensure contacting of ethanol and frictional interface, can improve the sensitivity of this ethanol sensor.Should be simple in structure, with low cost based on the electric ethanol sensor of friction, and manufacture craft is simple, highly sensitive, be applicable to large-scale promotion application.
Brief description of the drawings
Fig. 1 shows the perspective view of the ethanol sensor of the first embodiment in the utility model;
Fig. 2 shows the blast structural representation of the ethanol sensor of the first embodiment in the utility model;
Fig. 3 shows the blast structural representation of the ethanol sensor of the second embodiment in the utility model;
Fig. 4 shows the blast structural representation of the ethanol sensor of the 3rd embodiment in the utility model;
Fig. 5 shows the blast structural representation of the ethanol sensor of the 4th embodiment in the utility model;
Fig. 6 shows the voltage of ethanol sensor in Fig. 3 with the variation schematic diagram of ethanol volume;
Fig. 7 shows the voltage of ethanol sensor in Fig. 5 with the variation schematic diagram of ethanol volume.
Embodiment
For fully understanding object, feature and effect of the utility model, by following concrete embodiment, utility model is elaborated, but utility model is not restricted to this.
It is a kind of based on the electric ethanol sensor of friction that the utility model provides, utilize, as the high molecular polymer insulation course of frictional interface, ethanol is had to wettability, thereby by the Ethanol Adsorption in cavity at surface of insulating layer, affect the output voltage of sensor, the output voltage of this ethanol sensor and ethanol volume change are certain linear relationship, loaded down with trivial details in order to solve ethanol sensor manufacture craft of the prior art, the problem that cost price is high.
Refer to Fig. 1 and Fig. 2, Fig. 1 and Fig. 2 show respectively the blast structural representation based on the electric ethanol sensor of friction of the first embodiment in the perspective view of a kind of the first embodiment based on the electric ethanol sensor of friction of the present utility model and the utility model, the first embodiment of the present utility model comprises the first electrode layer (figure does not indicate) being cascading, separation layer 13 and the second electrode lay (figure does not indicate) based on the electric ethanol sensor 100 of friction.
The first electrode layer further comprises the first electrode 11 and the first high molecular polymer insulation course 12, the first high molecular polymer insulation course 12 is arranged on the first electrode 11 on the side surface of described the second electrode lay, the first high molecular polymer insulation course 12 and two side surfaces relative in described the second electrode lay frictional interface as described ethanol sensor.
Separation layer 13 is arranged on and forms between two surfaces of frictional interface, and separation layer 13 has at least one cavity 131, and cavity is polygon cavity.Wherein, Fig. 2 shows cavity 131 for hexagonal situation, and polygon cavity can also triangle and/or other forms such as quadrilateral and/or pentagon certainly.
The first electrode layer and the second electrode lay carry out contact friction by cavity 131, cavity 131 can be for the injection of ethanol and storage, in addition, cavity 131 not only can improve the contact separation of frictional interface, also make the ethanol injecting spread by cavity and be adsorbed on the first high molecular polymer insulation course 12, the existence of polygon cavity has improved the sensitivity of ethanol sensor preferably simultaneously.
Wherein, for ensure frictional interface contact with separate, the hexagon that the preferred length of side of cavity is 2.5～4mm, preferably 0.4～1mm of the distance between cavity.
Because the thickness of separation layer can affect the output of Abrasive voltage, in the time that separation layer is too thick, the first high molecular polymer insulation course and the second electrode can not fine contact frictions, in the time that separation layer is too thin, the first electrode layer can not finely separate with the second electrode lay, so preferably 20～50 μ m of the thickness of separation layer.
The second electrode lay further comprises the second electrode 14, and separation layer 13 is separated the first high molecular polymer insulation course 12 and the second electrode 14, can make the first high molecular polymer insulation course 12 better contact and separate with the second electrode 14.In addition, the first high molecular polymer insulation course 12 and the second electrode 14 carry out contact friction generating by the multiple cavitys 131 on separation layer 13, and the first electrode 11 and the second electrode 14 as described ethanol sensor signal output part.
On the first electrode layer or the second electrode lay, being also provided with a through hole 110 in through hole 110(the present embodiment is arranged on the first electrode layer, certainly can also be arranged on the second electrode lay, thought of the present utility model is not limited to this), through hole 110 and cavity 131 position correspondences, through hole 131 is for injection and the output of ethanol; Wherein, when cavity has when multiple, alcohol vapour can be diffused to other periphery cavitys and is adsorbed on frictional interface by the cavity relative with through hole 110 131.
When ethanol sensor is during in squeezed state not, separation layer 13 can be opened the first high molecular polymer insulation course and the second electrode separation, in the time of the whole ethanol sensor of extruding, the first high molecular polymer insulation course and the second electrode induce respectively electric charge by cavity rubbing contact and on the first electrode and the second electrode.
In the present embodiment based on the electric ethanol sensor of friction, the first high molecular polymer insulation course need possess better wettability, alcohol vapour or liquid just can be adsorbed on the first high molecular polymer insulation course like this, the existence of alcohol vapour or liquid can reduce the triboelectric charge amount of friction aspect, thereby cause the decline of ethanol sensor output voltage, the output voltage of ethanol sensor and the Ethanol Adsorption concentration on rubbing surface is linear, just can measure the concentration of ethanol by detecting the size of output voltage of ethanol sensor.
Introduce the material of each layer selection in ethanol sensor in embodiment mono-below:
The first high molecular polymer insulation course edge layer material therefor is PDMS (dimethyl silicone polymer), PMMA (polymethylmethacrylate), PTFE (teflon), PET (polyethylene terephthalate), PA(polyamide ethanol to wettability) in any.
Separation layer material therefor is PET (polyethylene terephthalate), PVC (Polyvinylchloride), PE (vinyon), PTFE (teflon), PP (acrylic plastering), Kynoar, dacron, fluorinated ethylene propylene copolymer, polychlorotrifluoroethylene, perfluoroethylene-propylene, polyolefin, CPE(haloflex), CMS(chlorosulfonated polyethylene), tetrafluoroethene, polystyrene, EVA(ethylene-vinyl acetate copolymer), TPV(TPV), TPU(Polyurethane Thermoplastic Elastomer rubber), EPDM(ethylene-propylene-diene rubber), TPR(thermoplastic elastomer), Kapton, any in aniline formaldehyde resin film.
The first electrode material therefor is indium tin oxide, Graphene, nano silver wire film, metal or alloy, wherein metal is Au Ag Pt Pd, aluminium, nickel, copper, titanium, chromium, tin, iron, manganese, molybdenum, tungsten or vanadium, and alloy is aluminium alloy, titanium alloy, magnesium alloy, beryllium alloy, aldary, kirsite, manganese alloy, nickel alloy, lead alloy, ashbury metal, cadmium alloy, bismuth alloy, indium alloy, gallium alloy, tungalloy, molybdenum alloy, niobium alloy or tantalum alloy; Described the second electrode material therefor is metal or alloy.
Refer to Fig. 3, the blast structural representation that Fig. 3 shows the ethanol sensor of the second embodiment of the present utility model stands, ethanol sensor 200 in the present embodiment comprises the first electrode layer (figure does not indicate) being cascading, separation layer 23 and the second electrode lay.
Wherein, the first electrode layer further comprises the first electrode 21 and the first high molecular polymer insulation course 22, the first high molecular polymer insulation course 22 is arranged on the first electrode 21 on the side surface of described the second electrode lay, the first high molecular polymer insulation course 22 and two side surfaces relative in described the second electrode lay frictional interface as ethanol sensor.
Separation layer 23 is arranged on and forms between two surfaces of frictional interface, and on separation layer 23, is provided with at least one cavity 231, and shape, the size of cavity 231, form and effect are set can reference example one, is not repeating herein.
Can reference example one about the thickness size of separation layer, do not repeating herein.
The second electrode lay further comprises that the second electrode 24 and the second high molecular polymer insulation course 25, the second polymer insulation layer 25 are arranged on the second electrode 24 on the side surface of described the first electrode layer.Separation layer 23 is separated the first high molecular polymer insulation course 22 and the second high molecular polymer insulation course 25, can make two high molecular polymer insulation courses better contact and separate.Two high molecular polymer insulation courses contact and triboelectricity by the multiple cavitys 231 on separation layer 23, and the first electrode 21 and the second electrode 24 are as the signal output part of ethanol sensor.
The first electrode layer or be also provided with a through hole 210 in through hole 210(the present embodiment above the second electrode lay and be arranged on above the first electrode layer, certainly can also be arranged on the second electrode lay, thought of the present utility model is not limited to this), through hole 210 and cavity 231 position correspondences, through hole 231 is for the input and output of ethanol.
In addition, in the present embodiment, the first electrode of ethanol sensor and/or the second electrode material therefor are indium tin oxide, when Graphene, ethanol sensor also further comprises supporting layer (figure is signal not), supporting layer and described the first electrode or the second electrode are fixed as one, for supporting described the first electrode or the second electrode.
In the present embodiment based on the electric ethanol sensor of friction, the first high molecular polymer insulation course need possess better wettability, alcohol vapour or liquid just can be adsorbed on the first high molecular polymer insulation course like this, the existence of alcohol vapour or liquid can reduce the triboelectric charge amount of friction aspect, thereby cause the decline of ethanol sensor output voltage, the output voltage of ethanol sensor is with to be adsorbed on concentration of alcohol on rubbing surface linear, can measure the concentration of ethanol by detecting the size of output voltage of ethanol sensor.
Introduce the material of each layer selection in ethanol sensor in embodiment bis-below:
The first high molecular polymer insulation course and separation layer material therefor please refer to embodiment mono-in the first high molecular polymer insulation course and separation layer material therefor; So the first electrode and the second electrode material please refer to the first electrode material therefor in embodiment mono-.
The second high molecular polymer insulation course material therefor is PET (polyethylene terephthalate), PVC (Polyvinylchloride), PE (vinyon), PTFE (teflon), PP (acrylic plastering), Kynoar, dacron, fluorinated ethylene propylene copolymer, polychlorotrifluoroethylene, perfluoroethylene-propylene, polyolefin, CPE(haloflex), CMS(chlorosulfonated polyethylene), tetrafluoroethene, polystyrene, EVA(ethylene-vinyl acetate copolymer), TPV(TPV), TPU(Polyurethane Thermoplastic Elastomer rubber), EPDM(ethylene-propylene-diene rubber), TPR(thermoplastic elastomer), Kapton, any in aniline formaldehyde resin film.
Refer to Fig. 4, Fig. 4 shows the structure exploded perspective view of the ethanol sensor 400 of the 3rd embodiment of the present utility model, the ethanol sensor 400 of the 3rd embodiment of the present utility model comprises the first electrode layer (figure does not indicate) being cascading, separation layer 43 and the second electrode lay (figure does not indicate).
All the same with ethanol sensor in embodiment mono-of the layer of structure of ethanol sensor and electricity generating principle in the present embodiment, the first electrode layer further comprises the first electrode 41 and the first high molecular polymer insulation course 42, the second electrode lay further comprises the second electrode 44, separation layer 43 is opened the first high molecular polymer insulation course and the second electrode separation, can make the first high molecular polymer insulation course 42 better contact and separate with the second electrode 44.
In the ethanol sensor of the present embodiment and embodiment mono-, the difference of ethanol sensor is, cavity on the separation layer 43 that the present embodiment adopts is spirality cavity 430, spirality cavity 430 comprises that the first end 431 of perforation and the second end 432, the first high molecular polymer insulation courses 42 and the second electrode 44 carry out contact friction generating by spirality cavity 430.
Spirality cavity 430 not only can improve the contact separation of frictional interface, also makes the ethanol injecting spread and be adsorbed on the first high molecular polymer insulation course 42 simultaneously, and the existence of spirality cavity has improved the sensitivity of ethanol sensor preferably.
In addition, through hole in the present embodiment comprises that the entrance and exit in an entrance 411 and outlet 412(the present embodiment of being located on the first electrode layer or the second electrode lay is arranged on above the first electrode layer, certainly can also be arranged on the second electrode lay, thought of the present utility model is not limited to this), spirality cavity 430 comprises the two ends of perforation, the first end 431 of the corresponding spirality cavity 430 of entrance 411, export the second end 432 of 412 corresponding conveyor screws 430, entrance 411 and first end 431 are for the injection of ethanol, outlet 412 and described the second end 432 are for the output of ethanol.Certainly the entrance and exit in the present embodiment can also share one, at the first electrode layer or a through hole is set above the second electrode lay.
The principle that the ethanol sensor of the present embodiment detects ethanol is the same with the detection principle of ethanol sensor in embodiment mono-, and the selection of layers of material can be with reference to the layers of material of ethanol sensor in embodiment mono-.
It should be noted that, in order to make the first electrode layer better contact and separate with the second electrode lay, the thickness of separation layer is 20～50 μ m preferably, spirality cavity on separation layer by center to external diffusion, at least there is a circle, preferably 5 circles, the width of cavity is 1～2mm.In the time that cavity is 5 circle, the preferred 1.8mm of the width of cavity.
Refer to Fig. 5, Fig. 5 shows the structure exploded perspective view of the ethanol sensor of the 4th embodiment of the present utility model, and the ethanol sensor 500 in the present embodiment comprises the first electrode layer (figure does not indicate) being cascading, separation layer 53 and the second electrode lay.
All the same with ethanol sensor in embodiment bis-of the layer of structure of ethanol sensor and electricity generating principle in the present embodiment, the first electrode layer further comprises the first electrode 51 and the first high molecular polymer insulation course 52, the second electrode lay further comprises the second high molecular polymer insulation course 55 and the second electrode 56, separation layer 53 is separated the first high molecular polymer insulation course 52 and the second high molecular polymer insulation course 55, can make the first high molecular polymer insulation course 52 better contact and separate with the second high molecular polymer insulation course 55.
In the ethanol sensor of the present embodiment and embodiment bis-, the difference of ethanol sensor is, cavity on the separation layer 53 that the present embodiment adopts is spirality cavity 530, spirality cavity 530 comprises that the first end 531 of perforation and the second end 532, the first high molecular polymer insulation courses 52 and the second high molecular polymer insulation course 55 carry out contact friction generating by spirality cavity 530.
In addition, through hole in the present embodiment comprises that the entrance and exit in an entrance 511 and outlet 512(the present embodiment of being located on the first electrode layer or the second electrode lay is arranged on above the first electrode layer, certainly can also be arranged on the second electrode lay, thought of the present utility model is not limited to this), spirality cavity 530 comprises the two ends of perforation, the first end 531 of the corresponding spirality cavity 530 of entrance 511, export the second end 532 of 512 corresponding spirality cavitys 530, entrance 511 and first end 531 are for the injection of ethanol, outlet 512 and described the second end 532 are for the output of ethanol.Certainly the entrance and exit in the present embodiment can also share one, at the first electrode layer or a through hole is set above the second electrode lay.
The principle that the ethanol sensor of the present embodiment detects ethanol is the same with the detection principle of ethanol sensor in embodiment bis-, and the selection of layers of material can be with reference to the layers of material of ethanol sensor in embodiment bis-.
It should be noted that, in order to make the first electrode layer better contact and separate with the second electrode lay, the thickness of separation layer is 20～50 μ m preferably, spirality cavity on separation layer by center to external diffusion, at least there is a circle, preferably 5 circles, the width of cavity is 1～2mm.In the time that cavity is 5 circle, the preferred 1.8mm of the width of cavity.
In addition, in the present embodiment, the first electrode of ethanol sensor or the second electrode material therefor are indium tin oxide, when Graphene, ethanol sensor also further comprises supporting layer (figure is signal not), supporting layer and described the first electrode or the second electrode are fixed as one, for supporting described the first electrode or the second electrode.
Separation layer in embodiment mono-to four can by two frictional layer isolation separately, guarantee that two frictional layers, in not extruded situation, can not contact with each other.The shape of separation layer cavity can adopt the method for laser-induced thermal etching, on macromolecule membrane, cut out the separation layer of spirality cavity in the separation layer of the polygon cavity having in embodiment mono-to two and embodiment tri-to four, except this, can also etch as required the separation layer of other shape cavitys.
In the time using in above-described embodiment one to four ethanol sensor, after injecting ethanol 5ul to 20ul, be placed on the heating plate of 90～100 DEG C and heat several minutes, preferably heating 1 to 2 minute, and seal inlet with adhesive tape ethanol steam is stayed in device, the vibrator by fixed frequency (4Hz) with pressure (40Nt), press and upper and lower two surfaces of device, recording voltage output, just can obtain the linear graph of voltage with ethanol volume change, thereby detect the concentration of ethanol.
Further, can be placed on and on 90～100 DEG C of heating plates, heat 10 minutes with residual ethanol in experiment before removing as need reuse ethanol sensor, thereby ensure the accuracy of each data of surveying.
In addition, the ethanol sensor with spirality cavity of same structure level is compared with the ethanol sensor with hexagonal cavities, in spirality cavity, the contact area of alcohol vapour and rubbing surface is larger, so it is higher to have the sensitivity of ethanol sensor of spirality cavity, will describe by specific embodiment below.
Ethanol sensor of the present utility model is by arranging separation layer, cavity is set on separation layer, and at the first electrode layer or ethanol gateway is set above the second electrode lay, by detecting the voltage of triboelectricity generation and the linear change of ethanol volume, can know concentration of alcohol size, thereby can for example, for the detection of concentration of alcohol: the detection of the alcohol concentration in can exhaling for the detection of concentration of alcohol in fermentation industry and drunk driver etc.Ethanol sensor manufacture craft of the present utility model is simple, highly sensitive, can be cost-saving greatly, be applicable to large-scale promotion application.
Of the present utility model have wettability as the high molecular polymer insulation course of frictional interface to ethanol based on the electric ethanol sensor utilization of friction, thereby by the Ethanol Adsorption in cavity at surface of insulating layer, and by separation layer being set between the first electrode layer and the second electrode lay, the contact separation that improves frictional interface on the one hand, on separation layer, be formed on the other hand polygon cavity or spirality cavity that alcohol vapour or liquid inject and stores, thereby ensure contacting of ethanol and frictional interface, affect the output voltage of sensor, improve the sensitivity of this ethanol sensor.
Set forth the enforcement of the method for ethanol sensor of the present utility model below by specific embodiment, one skilled in the art will appreciate that this should not be understood to the restriction to the utility model claim scope.
Embodiment 1
Ethanol sensor is of a size of 5cmX3.5cm, and gross thickness is approximately 0.54mm.Ethanol sensor 200 comprises the first electrode layer (figure does not indicate) being cascading, separation layer 23 and the second electrode lay (figure does not indicate) as shown in Figure 3.
The first electrode layer comprises that the first electrode 21 and the first high molecular polymer insulation course 22, the first high molecular polymer insulation courses 22 are arranged on the first electrode 21 on the side surface of described the second electrode lay; Between the first electrode layer and the second electrode lay, form frictional interface, separation layer 23 is arranged between the frictional interface of formation, is provided with multiple hexagonal cavities 231 on separation layer 23; The second electrode lay comprises that the second electrode 24 and the second high molecular polymer insulation course 25, the second polymer insulation layer 25 are arranged on the second electrode 24 on the side surface of described the first electrode layer.
Above the first electrode layer, be also provided with a through hole 210, the position correspondence of one of them cavity 231 on the position of through hole 210 and separation layer 23, through hole is for injection and the output of ethanol.
The first high molecular polymer insulation course 22 and the second polymer insulation layer 25 are carried out contact friction generating by the multiple cavitys 231 on separation layer 23, and the first electrode 21 and the second electrode 24 are as the signal output part of described ethanol sensor.
The first high molecular polymer insulation course material therefor is to select the good PDMS of ethanol wettability (dimethyl siloxane), and thickness is 30um; The separation layer material therefor with hexagonal cavities is PET(polyethylene terephthalate), thickness is 30um, the length of side of hexagonal cavities is for being 4mm.The second high molecular polymer insulation course material therefor is PET(polyethylene terephthalate), thickness is 0.24mm.
The first electrode 21 and the second electrode 22 material therefors are ITO(indium tin oxides) conductive film, in order to support ITO conductive film, the first electrode 21 also comprise in addition one and the not signal of PET(figure that is fixed as one of ITO), ITO and PET entirety are as the first electrode, and the second electrode ITO can be upper to its support by being fixed in the second high molecular polymer insulation course PET.
When encapsulation, first by a side of separation layer with the second high molecular polymer insulation course that is fixed with the second electrode with 3M SP7533 printing water solid sealing one, the another side of separation layer and the first high molecular polymer insulation course PDMS are placed on after dewatering 10 minutes on 100 DEG C of heating plates and seal with plasma oxidation.
Refer to Fig. 6, Fig. 6 illustrates that the voltage of ethanol sensor in Fig. 3 is with the variation schematic diagram of ethanol volume.In the through hole of ethanol sensor, inject after 5～20 μ L ethanol, ethanol sensor is placed on the heating plate of 100 ° and heats after 1 minute, and seal through hole with adhesive tape ethanol steam is stayed in ethanol sensor, and with the vibrator survey sensor output voltage of fixed frequency (4Hz) and pressure (40Nt), learn that the output voltage of ethanol sensor is along with the ethanol volume in ethanol sensor increases and reduces, and become some linear between the two.
Embodiment 2
Ethanol sensor is of a size of 4cmX3.5cm, and gross thickness is approximately 0.54mm.Ethanol sensor 500 comprises the first electrode layer (figure does not indicate) being cascading, separation layer 53 and the second electrode lay (figure does not indicate) as shown in Figure 5.
The first electrode layer comprises that the first electrode 51 and the first high molecular polymer insulation course 52, the first high molecular polymer insulation courses 52 are arranged on the first electrode 51 on the side surface of described the second electrode lay; Between the first electrode layer and the second electrode lay, form frictional interface, separation layer 53 is arranged between the frictional interface of formation, on separation layer 53, being provided with spirality cavity 530, the first high molecular polymer insulation courses 52 contacts and triboelectricity by spirality cavity with the second electrode lay; The second electrode lay comprises that the second electrode 56 and the second high molecular polymer insulation course 55, the second polymer insulation layer 55 are arranged on the side surface of described the first electrode layer.
At least one through hole comprises an entrance 511 and an outlet 512, entrance and exit is arranged at the first electrode layer or above the second electrode lay, spirality cavity 530 comprises first end 531 and the second end 532, the first end 531 of the corresponding spirality cavity 530 of entrance 511, export the second end 532 of 512 corresponding spirality cavitys 530, entrance 511 and first end 531 are for the injection of ethanol, and outlet 512 and the second end 532 are for the output of ethanol.
The first high molecular polymer insulation course 52 and the second high molecular polymer insulation course 55 carry out triboelectricity by spirality cavity 530, and the first electrode 51 and the second electrode 56 are as the signal output part of described ethanol sensor.
The first high molecular polymer insulation course material therefor is to select the good PDMS of wettability (dimethyl siloxane), and thickness is 30um; The separation layer material therefor that is provided with cored screw body is PET(polyethylene terephthalate), thickness is 30um.The second high molecular polymer insulation course material therefor is PET(polyethylene terephthalate), thickness is 0.24mm.
The first electrode 51 and the second electrode 56 material therefors are ITO conductive films, in order to support ITO conductive film, the first electrode 51 also comprise in addition one and the not signal of PET(figure that is fixed as one of ITO), ITO and PET entirety are as the first electrode, and the second electrode ITO can be upper to its support by being fixed in the second high molecular polymer insulation course PET.
When encapsulation, first by a side of separation layer with the second high molecular polymer insulation course that is fixed with the second electrode with 3M SP7533 printing water solid sealing one, the another side of separation layer and the first high molecular polymer insulation course PDMS are placed on after dewatering 10 minutes on 100 DEG C of heating plates and seal with plasma oxidation.
Refer to Fig. 7, Fig. 7 shows ethanol sensor in Fig. 5 and does not inject ethanol and inject ethanol output voltage variation schematic diagram, in the through hole of ethanol sensor, inject after 5 μ L ethanol, ethanol sensor is placed on the heating plate of 100 DEG C and heats after 1 minute, and seal entrance with adhesive tape ethanol steam is stayed in ethanol sensor, and with vibrator survey sensor voltage, the output voltage of learning ethanol sensor is 1.2V, and the ethanol sensor that does not inject ethanol is heated, seals entrance and with vibrator survey sensor voltage, learn that voltage is 5.5V.
See also Fig. 6, be 5 μ L and while not injecting ethanol when inject respectively ethanol in ethanol sensor as shown in Figure 6, the output voltage of sensor is respectively 5.5V and 4.8V, known by comparative example 1 and 2, embodiment 2 neutral lines change more obvious, the output voltage that is ethanol sensor is more obvious with the how many variations of input of ethanol volume, can reflect that the sensitivity of the ethanol sensor in embodiment 2 is higher from figure.
In embodiment 2, the separation layer of sensor is conveyor screw, make like this contact area of the alcohol vapour that evaporates and frictional layer larger, the output voltage of ethanol sensor and ethanol volume linear change are more obvious, the sensitivity of whole sensor is higher, so the ethanol sensor in embodiment 2 can be for the detection of micro ethanol concentration, application is wider.
Can be found out by embodiment of the present utility model, of the present utility model have wettability as the high molecular polymer insulation course of frictional interface to ethanol based on the electric ethanol sensor utilization of friction, thereby by the Ethanol Adsorption in cavity at surface of insulating layer, affect the output voltage of sensor, output voltage and ethanol volume change that experiment records ethanol sensor are some linear, so can know the concentration of ethanol by the output voltage of ethanol sensor, therefore this ethanol sensor can be applied to detection and other alcohol detection fields of the interior alcohol concentration of human pilot body in drunk driving.
Claims (11)
1. based on the electric ethanol sensor of friction, it is characterized in that, described ethanol sensor comprises the first electrode layer being cascading, separation layer and the second electrode lay;
Described the first electrode layer further comprises the first electrode and the first high molecular polymer insulation course, and described the first high molecular polymer insulation course is arranged on described the first electrode on the side surface of described the second electrode lay;
Described separation layer has at least one cavity, and described the first electrode layer and described the second electrode lay are by described cavity contact friction;
Described the second electrode lay further comprises the second electrode;
Described the first electrode layer or be also provided with at least one through hole above the second electrode lay, described through hole and described empty cavity position correspondence, described through hole is for the input and output of ethanol;
Described the first high molecular polymer insulation course and two side surfaces relative in described the second electrode frictional interface as described ethanol sensor, and described the first electrode and described the second electrode are as the signal output part of described ethanol sensor.
2. as claimed in claim 1 based on the electric ethanol sensor of friction, it is characterized in that, described the second electrode lay further comprises the second high molecular polymer insulation course, described the second high molecular polymer insulation course is arranged on described the second electrode on the side surface of described the first electrode layer, described the first high molecular polymer insulation course and two side surfaces relative in described the second high molecular polymer insulation course frictional interface as described ethanol sensor, and described the first electrode and described the second electrode are as the signal output part of described ethanol sensor.
3. as claimed in claim 2ly it is characterized in that based on the electric ethanol sensor of friction, described ethanol sensor further comprises supporting layer, and described supporting layer is arranged on described the first electrode or described the second electrode; Wherein, described supporting layer is fixedly connected with described the first electrode or described the second electrode, for supporting described the first electrode or described the second electrode.
4. as claimed any one in claims 1 to 3 based on the electric ethanol sensor of friction, it is characterized in that, described cavity is the polygon cavity being arranged on described separation layer, described polygon cavity is triangle and/or quadrilateral and/or pentagon and/or hexagon, and described frictional interface carries out contact friction by described polygon cavity.
5. as claimed any one in claims 1 to 3 based on the electric ethanol sensor of friction, it is characterized in that, described cavity is the spirality cavity being arranged on described separation layer, described spirality cavity comprises first end and second end of perforation, and described frictional interface carries out contact friction by described spirality cavity.
6. as claimed in claim 5 based on the electric ethanol sensor of friction, it is characterized in that, described at least one through hole comprises entrance for inputting ethanol and for exporting the outlet of ethanol, the corresponding described entrance of the first end of described spirality cavity, the corresponding described outlet of the second end.
7. as claimed any one in claims 1 to 3 based on the electric ethanol sensor of friction, it is characterized in that, the thickness of described separation layer is 20～50 μ m.
8. as claimed any one in claims 1 to 3 based on the electric ethanol sensor of friction, it is characterized in that, described the first high molecular polymer insulation course material therefor is that ethanol is had to any in the dimethyl silicone polymer, polymethylmethacrylate, teflon, polyethylene terephthalate, polyamide of wettability, described separation layer material therefor is polyethylene terephthalate, Polyvinylchloride, tygon, teflon, polypropylene, Kynoar, dacron, fluorinated ethylene propylene copolymer, polychlorotrifluoroethylene, perfluoroethylene-propylene, polyolefin, haloflex, chlorosulfonated polyethylene, tetrafluoroethene, polystyrene, ethylene-vinyl acetate copolymer, TPV, Polyurethane Thermoplastic Elastomer rubber, ethylene-propylene-diene rubber, thermoplastic elastomer, Kapton, any in aniline formaldehyde resin film.
As described in any one in claim 2 to 3 based on the electric ethanol sensor of friction, it is characterized in that, described the second high molecular polymer insulation course material therefor is polyethylene terephthalate, Polyvinylchloride, vinyon, teflon, acrylic plastering, Kynoar, dacron, fluorinated ethylene propylene copolymer, polychlorotrifluoroethylene, perfluoroethylene-propylene, polyolefin, haloflex, chlorosulfonated polyethylene, tetrafluoroethene, polystyrene, ethylene-vinyl acetate copolymer, TPV, Polyurethane Thermoplastic Elastomer rubber, ethylene-propylene-diene rubber, thermoplastic elastomer, Kapton, any in aniline formaldehyde resin film.
10. as described in claim 1 based on the electric ethanol sensor of friction, it is characterized in that, described the first electrode material therefor is indium tin oxide, Graphene, nano silver wire film, metal or alloy; Described the second electrode material therefor is metal or alloy.
11. described in claim 2 or 3 based on the electric ethanol sensor of friction, it is characterized in that, described the first electrode and described the second electrode material therefor are indium tin oxide, Graphene, nano silver wire film, metal or alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128198.7U CN203772784U (en) | 2014-03-20 | 2014-03-20 | Frictional electricity-based ethanol sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420128198.7U CN203772784U (en) | 2014-03-20 | 2014-03-20 | Frictional electricity-based ethanol sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931533A (en) * | 2014-03-20 | 2015-09-23 | 纳米新能源（唐山）有限责任公司 | Triboelectricity-based ethanol sensor |
| CN106153127A (en) * | 2015-03-30 | 2016-11-23 | 纳米新能源（唐山）有限责任公司 | Electronic cigarette pneumatic transmitter, airflow treatment device and electronic cigarette |
-
2014
- 2014-03-20 CN CN201420128198.7U patent/CN203772784U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931533A (en) * | 2014-03-20 | 2015-09-23 | 纳米新能源（唐山）有限责任公司 | Triboelectricity-based ethanol sensor |
| CN104931533B (en) * | 2014-03-20 | 2018-03-23 | 纳米新能源（唐山）有限责任公司 | A kind of ethanol sensor based on friction electricity |
| CN106153127A (en) * | 2015-03-30 | 2016-11-23 | 纳米新能源（唐山）有限责任公司 | Electronic cigarette pneumatic transmitter, airflow treatment device and electronic cigarette |
| CN106153127B (en) * | 2015-03-30 | 2023-09-19 | 纳米新能源（唐山）有限责任公司 | Electronic cigarette pneumatic sensor, airflow processing device and electronic cigarette |
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