CN107525826A - From early warning gas sensor - Google Patents
From early warning gas sensor Download PDFInfo
- Publication number
- CN107525826A CN107525826A CN201710428453.8A CN201710428453A CN107525826A CN 107525826 A CN107525826 A CN 107525826A CN 201710428453 A CN201710428453 A CN 201710428453A CN 107525826 A CN107525826 A CN 107525826A
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- Prior art keywords
- gas
- film
- housing
- sensing element
- early warning
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
Abstract
The invention discloses one kind from early warning gas sensor, including：End cap, housing and multiple gas-sensing elements；Wherein, end cap is arranged at the top of housing, and gas outlet is offered on end cap；Housing includes side wall and bottom surface, air inlet being offered on the bottom surface of housing, and housing has hollow structure to form gas channel, and gas channel connects with air inlet and gas outlet, to cause air flow through air inlet into gas channel and be flowed out by gas outlet；Multiple gas-sensing elements are arranged in housing；When air-flow enters gas channel by air inlet, gas-sensing element is because of electric signal corresponding to airflow function generation.Using technical scheme provided by the invention, it can easily know whether gas-sensing element is in abnormality according to electric signal caused by multiple gas-sensing elements.
Description
Technical field
The present invention relates to sensor technical field, and in particular to a kind of from early warning gas sensor.
Background technology
With the continuous development of science and technology and people's life requirement, many aspects of the gas sensor in life are obtained for
Using.But after gas sensor comes into operation, people are difficult that can know which gas sensor works out in time
It is now abnormal, and then gas sensor can not be repaired or replaced in time.
The content of the invention
The goal of the invention of the present invention is the defects of being directed to prior art, there is provided one kind is used for from early warning gas sensor
Solve the problems, such as that people are difficult to know that gas sensor work appearance is abnormal in time in the prior art.
The invention provides one kind from early warning gas sensor, including：End cap, housing and multiple gas-sensing elements；Its
In,
End cap is arranged at the top of housing, and gas outlet is offered on end cap；
Housing includes side wall and bottom surface, offering air inlet on the bottom surface of housing, housing has hollow structure to form gas
Circulation road, gas channel connect with air inlet and gas outlet, to cause air flow through air inlet into gas channel and pass through outlet
Mouth outflow；
Multiple gas-sensing elements are arranged in housing；When air-flow enters gas channel by air inlet, gas sensing
Element is because of electric signal corresponding to airflow function generation.
Further, multiple fixed components are provided with the side wall of housing, multiple fixed components are used for multiple gas senses
Element is surveyed to be fixed in housing.
Further, fixed component is strip projection；Strip projection is to inner side depression and in housing from the side wall of housing
Side wall the ridge portion that is formed of inner surface；Each gas-sensing element is fastened between two strip projections.
Further, gas-sensing element includes：Base framework and be embedded into inside base frames body and stack gradually
Metal electrode layer, annular gasket and the vibrating diaphragm of setting；Wherein,
Inner surface of one side of the metal electrode layer away from annular gasket close to the side wall of housing；Metal electrode layer and vibrating diaphragm it
Between be separated by annular gasket with formed friction space；
The subregion of vibrating diaphragm is exposed in gas channel by base framework；Under airflow function, vibrating diaphragm and metal electricity
Electric signal corresponding to pole layer friction and generation；Metal electrode layer is the electrical signal of gas-sensing element.
Further, the friction space formed between metal electrode layer and vibrating diaphragm is confined space.
Further, also include from early warning gas sensor：Alarm module；
Alarm module is arranged on end cap, for when any gas-sensing element is in abnormality, sending alarm letter
Number.
Further, alarm module is additionally operable to：Judge to whether there is at least two gas senses in multiple gas-sensing elements
The difference surveyed between electric signal caused by element is more than the first preset signals threshold value, if so, then sending alarm signal.
Further, alarm module is additionally operable to：Judge to whether there is at least one gas sense in multiple gas-sensing elements
Electric signal caused by surveying element is less than the second preset signals threshold value, if so, then sending alarm signal.
Further, multiple signal exits are additionally provided with end cap；Multiple signal exits respectively with multiple gas senses
The signal output part for surveying element is connected, for drawing electric signal caused by multiple gas-sensing elements.
Further, the material of housing is conductive material, and insulating barrier is additionally provided with the inner surface of the side wall of housing.
Further, it is provided with array of protrusions knot at least one face in two opposite faces of metal electrode layer and vibrating diaphragm
Structure.
Further, it is thin to be selected from polydimethylsiloxanefilm film, Kapton, Kynoar for the material of vibrating diaphragm
It is film, aniline formaldehyde resin film, polyoxymethylene film, ethyl cellulose film, polyamide film, melamino-formaldehyde film, poly-
Ethylene glycol succinate film, cellophane, cellulose acetate film, polyethylene glycol adipate film, poly- adjacent benzene two
Formic acid diallyl film, fiber sponge film, elastic polyurethane body thin film, styrene-acrylonitrile copolymer copolymer film, styrene fourth
Diene copolymers film, staple fibre film, poly- methyl film, methacrylic acid ester film, polyvinyl alcohol film, polyester
Film, polyisobutene film, polyurethane flexible sponge films, pet film, polyvinyl butyral resin are thin
Film, formaldehyde-phenol film, neoprene film, butadiene-propylene copolymer film, natural rubber films, polyacrylonitrile film,
One kind in acrylonitrile vinyl chloride film and polyethylene the third diphenol carbonate thin film.
According to provided by the invention from early warning gas sensor, enclosure interior forms gas channel, and by multiple gas senses
Survey element to be arranged in housing, when air-flow enters gas channel by air inlet, gas-sensing element produces because of airflow function
Corresponding electric signal.The above-mentioned of the present invention can be applied to the fields such as medical gas measurement from early warning gas sensor, should be from early warning
Gas sensor not only has that sensitivity and accuracy rate are high, structure and manufacture craft are simple, cost is cheap, is adapted to large-scale industry
The advantages of production, and the electric signal according to caused by multiple gas-sensing elements can easily know that gas-sensing element is
It is no to be in abnormality, the technique effect from early warning is obtained, so that user is in time repaired or replaced it, helps to prolong
The service life of long gas sensor.In addition, when the friction space of gas-sensing element is confined space, additionally it is possible to contribute to
The generation to electric signal such as air-flow characteristic in itself or humidity is avoided to impact.
Brief description of the drawings
Fig. 1 a are the decomposition texture schematic diagram provided by the invention from early warning gas sensor embodiment；
Fig. 1 b are the structural representation one provided by the invention from after the assembling of early warning gas sensor embodiment；
Fig. 1 c are the structural representation two provided by the invention from after the assembling of early warning gas sensor embodiment；
Fig. 1 d are the setting schematic diagram of the fixed component in the gas sensor embodiment provided by the invention from early warning；
Fig. 2 a are that the decomposition texture of the gas-sensing element in the gas sensor embodiment provided by the invention from early warning shows
It is intended to；
Fig. 2 b are structure after the assembling of the gas-sensing element in the gas sensor embodiment provided by the invention from early warning
Schematic diagram；
Fig. 2 c are section after the assembling of the gas-sensing element in the gas sensor embodiment provided by the invention from early warning
Structural representation.
Embodiment
To be fully understood by the purpose of the present invention, feature and effect, by following specific embodiments, the present invention is done in detail
Describe in detail bright, but the present invention is not restricted to this.
The invention provides one kind from early warning gas sensor, should include from early warning gas sensor：End cap, housing and more
Individual gas-sensing element；Wherein, end cap is arranged at the top of housing, and gas outlet is offered on end cap；Housing includes side wall and bottom
Face, offers air inlet on the bottom surface of housing, and housing has hollow structure to form gas channel, gas channel and air inlet and
Gas outlet connects, to cause air flow through air inlet into gas channel and be flowed out by gas outlet；Multiple gas-sensing elements are set
It is placed in housing；When air-flow enters gas channel by air inlet, gas-sensing element is because of electricity corresponding to airflow function generation
Signal., can according to electric signal caused by multiple gas-sensing elements using provided by the invention from early warning gas sensor
Easily know whether gas-sensing element is in abnormality, obtain the technique effect from early warning.
Fig. 1 a are c points of the decomposition texture schematic diagram provided by the invention from early warning gas sensor embodiment, Fig. 1 b and Fig. 1
Not Wei the structural representation provided by the invention from after the assembling of early warning gas sensor embodiment, such as Fig. 1 a, Fig. 1 b and Fig. 1 c institutes
Show, should include from early warning gas sensor：End cap 110, housing 120 and multiple gas-sensing elements 130.In the present embodiment,
Schematically illustrating includes the situation of three gas-sensing elements 130 from early warning gas sensor, and those skilled in the art can
The quantity for setting gas-sensing element 130 according to being actually needed, is not limited herein.
Wherein, end cap 110 is arranged at the top of housing 120, and gas outlet 111 is offered on end cap 110, is gone back on end cap 110
It is provided with multiple signal exit 112-114.The quantity of gas outlet 111 shown in the present embodiment is two, is shaped as
Circle, the two gas outlets 111 are distributed in multiple signal exit 112-114 both sides.Alternatively, end cap 110 can be printing
Circuit board.End cap 110 can use the mode such as screw thread, gluing to be attached with housing 120, and those skilled in the art can be according to reality
Border needs to select the connected mode of the two, is not construed as limiting herein.
Housing 120 includes side wall and bottom surface, and air inlet 121 is offered on the bottom surface of housing 120, and housing 120 has hollow
To form gas channel, gas channel connects structure with air inlet 121 and gas outlet 111, is entered with causing air flow through air inlet 121
Enter gas channel and flowed out by gas outlet 111.The quantity of air inlet 121 shown in the present embodiment is one, shape
For circle, this air inlet 121 is opened in the centre position of the bottom surface of housing 120.Those skilled in the art can be according to actual need
The quantity, shape and specific distribution mode of air inlet 121 and gas outlet 111 are set, do not limited herein.Alternatively, it is
It is easy to the air-flow to form vortex in gas channel, so that gas-sensing element 130 can preferably rub, the transverse direction of air inlet
Area of section sum can be more than or less than the lateral cross-sectional area sum of gas outlet.In addition, the generation of vortex and air-flow velocity, gas
Current density is relevant with the structure of gas channel, and air-flow velocity is faster, and current density is bigger, the structure of gas channel more irregularly,
Caused venturi effect is stronger, therefore, in order to improve the sensitivity of gas-sensing element 130 and output, can be set in housing 120
Put projection, step or carry out corresponding structure design, to improve effect caused by vortex.
Three gas-sensing elements 130 are evenly arranged in housing 120.When air-flow enters air-flow by air inlet 121
During passage, gas-sensing element 130 is because of electric signal corresponding to airflow function friction and generation.It is provided with the side wall of housing 120
Multiple fixed components, multiple fixed components are used to multiple gas-sensing elements 130 being fixed in housing 120.Art technology
Personnel can be not specifically limited to the form of fixed component herein according to setting fixed component is actually needed.
In the present embodiment, fixed component is strip projection 122, and as shown in Figure 1 d, strip projection 122 is by housing 120
Side wall to inner side is recessed and ridge portion that the inner surface of side wall in housing 120 is formed, each gas-sensing element 130 block
It is located between two strip projections 122.Specifically, will can be set with strip projection the side wall of the corresponding housing 120 in position to
Inner side is recessed, and so as to form ridge portion in the inner surface of the side wall of housing 120, the ridge portion formed is strip projection 122,
As shown in Figure 1 d, three strip projections 122 are provided with the side wall of housing 120, each gas-sensing element 130 is fastened on two
Between strip projection 122, so as to which three gas-sensing elements 130 are evenly arranged in housing 120.In addition, work as gas sense
Survey element 130 length be equal to housing 120 bottom surface to end cap 110 apart from when, gas-sensing element 130 can be by housing 120
Bottom surface and end cap 110 carry out longitudinal spacing；When the length of gas-sensing element 130 is less than the bottom surface of housing 120 to end cap 110
Apart from when, those skilled in the art can set corresponding structure according to prior art in housing 120, by gas sensing member
Part 130 carries out longitudinal spacing, is secured in place it, is caved inward for example, can be set on the surface of strip projection 122
Bump, while certain thickness packing ring is being set close to one end of end cap 110 or is increasing the thickness of end cap, it is matched somebody with somebody with bump
Close and longitudinal spacing is carried out to gas-sensing element 130.
When the material of housing 120 is insulating materials, insulating barrier need not be set on the inner surface of the side wall of housing 120；And
When the material of housing 120 is conductive material, also need to be provided with insulating barrier on the inner surface of the side wall of housing 120, specifically, can
Insulating barrier is set by the mode such as spray insulation glue or attaching dielectric film, not limited herein.
As shown in Fig. 1 a, Fig. 1 b and Fig. 1 c, on end cap 110 set multiple signal exit 112-114 respectively with it is more
The signal output part of individual gas-sensing element 130 is connected, for drawing electric signal caused by multiple gas-sensing elements 130.Its
In, electric signal caused by multiple gas-sensing elements 130 is separate.In normal operation, multiple gas senses
Element 130 is surveyed because the numerical value of electric signal caused by airflow function friction is substantially identical, it is of slight difference, can optionally wherein
The numerical value of one electric signal subsequently can determine whether air-flow by entering one as canonical measure value according to the canonical measure value
Step ground can also be according to information such as the flow of the canonical measure value calculated gas flow, flow velocitys.It should be noted that gas-sensing element exists
Because the numerical value of electric signal and the flow and flow rate of air-flow caused by airflow function friction are to correspond under normal operating conditions
's.Wherein, gas-sensing element because airflow function friction caused by between the numerical value of electric signal and the flow and flow rate of air-flow
Corresponding relation can be preset by the manufacturer produced from early warning gas sensor.
In the present embodiment, three signal exits 112,113,114 and an earth terminal are provided with end cap 110
115.Three 112,113,114 signal output parts respectively with three gas-sensing elements 130 of signal exit are connected, for drawing
Go out electric signal caused by these three gas-sensing elements 130.For example, first gas-sensing element 130 is because caused by friction
Electric signal is voltage electric signal V1, second gas-sensing element 130 because electric signal caused by friction is voltage electric signal V2,
3rd gas-sensing element 130 is voltage electric signal V3 because of electric signal caused by friction.These three voltage electric signals are phases
It is mutually independent.That signal exit 112 is drawn is voltage electric signal V1, and that signal exit 113 is drawn is voltage electric signal V2,
That signal exit 114 is drawn is voltage electric signal V3.
Using provided by the invention from early warning gas sensor, according to telecommunications caused by multiple gas-sensing elements 130
Number it can easily know whether gas-sensing element 130 is in abnormality, specifically, if some gas-sensing element
The numerical value of electric signal caused by 130 is less than electric signal caused by other gas-sensing elements 130 to a certain extent
The numerical value of numerical value or electric signal is zero, shows that the gas-sensing element 130 is in abnormality.In addition, in some gas
In the case that sensing element 130 is in abnormality, remain able to be continuing with from early warning gas sensor, it is specifically, optional
Select from telecommunications caused by any one gas-sensing element in other gas-sensing elements 130 in early warning gas sensor
Number numerical value as canonical measure value, subsequently according to the canonical measure value air-flow can be determined whether by further may be used also
According to information such as the flow of the canonical measure value calculated gas flow, flow velocitys.
Alternatively, also include from early warning gas sensor：Alarm module (not shown), alarm module may be disposed at end
On lid 110, for when electric signal is in abnormality caused by any gas-sensing element 130, such as some gas
The numerical value of electric signal caused by sensing element 130 is less than caused by other gas-sensing elements 130 to a certain extent
When the numerical value of electric signal is zero caused by the numerical value of electric signal or some gas-sensing element 130, alarm signal is sent,
Contribute to user to know in time and it is repaired or replaced.Those skilled in the art can set alarm letter according to being actually needed
Number concrete form, do not limit herein.For example, alarm signal can be the alarm signal of sound and/or light form.
Specifically, alarm module is used for：Judge to whether there is at least two gas sensings in multiple gas-sensing elements 130
Difference between electric signal caused by element 130 is more than the first preset signals threshold value, if so, then sending alarm signal.Ability
Field technique personnel can be configured according to being actually needed to the first preset signals threshold value, not limit herein.
Because multiple gas-sensing elements 130 in normal operation are because of electric signal caused by airflow function friction
Numerical value is substantially identical, of slight difference.Assuming that the quantity of gas-sensing element 130 is 3, if alarm module judges
Difference between electric signal caused by electric signal caused by first gas-sensing element and second gas-sensing element
Value is more than the first preset signals threshold value, electric signal caused by first gas-sensing element and the 3rd gas-sensing element institute
Difference between caused electric signal is also greater than the first preset signals threshold value, and telecommunications caused by second gas-sensing element
Difference number between the 3rd electric signal caused by gas-sensing element is less than or equal to the first preset signals threshold value, then
It can illustrate that first gas-sensing element is in abnormality, second gas-sensing element and the 3rd gas-sensing element
In normal operating conditions, then alarm module sends alarm signal, contributes to user to know in time and to first gas sensing
Element is repaired or replaced.
Alternatively, alarm module is additionally operable to：Judge to whether there is at least one gas sensing in multiple gas-sensing elements
Electric signal caused by element is less than the second preset signals threshold value, if so, then sending alarm signal.Those skilled in the art can root
The second preset signals threshold value is configured according to being actually needed, not limited herein.
Assuming that alarm module judges to obtain electricity caused by first gas-sensing element in multiple gas-sensing elements
Signal is less than the second preset signals threshold value, and electric signal caused by other gas-sensing elements is all higher than or pre- equal to second
If signal threshold value, then can illustrate that first gas-sensing element is in abnormality, second gas-sensing element and
Three gas-sensing elements are in normal operating conditions, then alarm module sends alarm signal, contributes to user to know in time simultaneously
First gas-sensing element is repaired or replaced.
Fig. 2 a, Fig. 2 b and Fig. 2 c are respectively the gas sensing member in the gas sensor embodiment provided by the invention from early warning
Cross section structure schematic diagram after structural representation and assembling after the decomposition texture schematic diagram of part, assembling, such as Fig. 2 a, Fig. 2 b and Fig. 2 c institutes
Show, gas-sensing element 130 includes：Base framework 131 and be embedded into inside base framework 131 and be cascading
Metal electrode layer 132, annular gasket 133 and vibrating diaphragm 134.Wherein, the inside of base framework 131 has certain depth, can make
Metal electrode layer 132, annular gasket 133 and vibrating diaphragm 134 are embedded into the inside of base framework 131.Base framework 131 and vibrating diaphragm
Fixed between 134, between vibrating diaphragm 134 and annular gasket 133, between annular gasket 133 and metal electrode layer 132 for glue bond,
Play a part of sealing simultaneously.Or pressing plate, pressing plate and bottom can also be set on surface of the metal electrode layer 132 away from vibrating diaphragm
Seat frame body 131 is connected, and metal electrode layer 132, annular gasket 133 and vibrating diaphragm 134 are fixed in base framework 131, and right
Gap carries out encapsulation process.One side of the metal electrode layer 132 away from annular gasket 133 is close to the inner surface of the side wall of housing, gold
It is separated between category electrode layer 132 and vibrating diaphragm 134 by annular gasket 133 to form friction space 135.Preferably, in gold
The friction space 135 formed between category electrode layer 132 and vibrating diaphragm 134 is confined space, helps avoid the characteristic of air-flow in itself
Or the generation to electric signal such as humidity impacts.
Fig. 2 c show cross section structure schematic diagram of the gas-sensing element in B-B ' directions, as shown in Figure 2 c, base framework
131 intermediate region hollow out, so that the subregion of vibrating diaphragm 134 is exposed in gas channel by base framework 131.In gas
Under stream effect, vibrating diaphragm 134 rubs with metal electrode layer 132 and produces corresponding electric signal.Wherein, metal electrode layer 132 is gas
The electrical signal of body sensing element 130.Specifically, when air-flow enters gas channel by air inlet, vortex can be produced
Act on vibrating diaphragm 134 so that air-flow drives vibrating diaphragm 134 to vibrate, and vibrating diaphragm 134 contacts friction with metal electrode layer 132 so as to produce
Raw electric charge.The change of air-flow velocity will cause the vibration of vibrating diaphragm 134 to change, so that vibrating diaphragm 134 connects with metal electrode layer 132
The quantity of electric charge caused by touching wiping also changes therewith, and the voltage and frequency for ultimately resulting in the electric signal of output can also become
Change.
Wherein, the material of metal electrode layer 132 may be selected from Au Ag Pt Pd, aluminium, nickel, copper, titanium, chromium, tin, iron, manganese, molybdenum,
Tungsten or vanadium；Alloy be aluminium alloy, titanium alloy, magnesium alloy, beryllium alloy, copper alloy, kirsite, manganese alloy, nickel alloy, metal,
One kind in tin alloy, cadmium alloy, bismuth alloy, indium alloy, gallium alloy, tungsten alloy, molybdenum alloy, niobium alloy and tantalum alloy.Vibrating diaphragm
It is thin that 134 material may be selected from polydimethylsiloxanefilm film, Kapton, polyvinylidene difluoride film, aniline-formaldehyde resin
Film, polyoxymethylene film, ethyl cellulose film, polyamide film, melamino-formaldehyde film, polyethylene glycol succinate are thin
Film, cellophane, cellulose acetate film, polyethylene glycol adipate film, polydiallyl phthalate film,
Fiber sponge film, elastic polyurethane body thin film, styrene-acrylonitrile copolymer copolymer film, styrene-butadiene-copolymer film, people
Make fiber membrane, poly- methyl film, it is methacrylic acid ester film, polyvinyl alcohol film, polyester film, polyisobutene film, poly-
Urethane flexibility sponge films, pet film, polyvinyl butyral film, formaldehyde-phenol film, chlorine
Buna film, butadiene-propylene copolymer film, natural rubber films, polyacrylonitrile film, acrylonitrile vinyl chloride film and
One kind in polyethylene the third diphenol carbonate thin film.Preferably, the material of selected metal electrode layer 132 and vibrating diaphragm 134
There should be larger polarity difference between material, to obtain preferable triboelectricity effect, for example, metal electrode layer 132
Material may be selected to be copper, and the material of vibrating diaphragm 134 may be selected to be polydimethylsiloxanefilm film or polyvinylidene difluoride film is contour
Polar material.The material of selected vibrating diaphragm 134 should have preferable shrinkage, be easy to deformation vibration.
In addition, the thickness of vibrating diaphragm 134 is an important factor for influenceing the sensitivity of gas-sensing element, the thickness of vibrating diaphragm 134
Thinner, sensitivity is better.Preferably, the thickness of vibrating diaphragm 134 should be less than 50 μm.
In order that metal electrode layer 132 can better contact with friction, increase friction with vibrating diaphragm 134 in gas-sensing element
The effect of generating, metal electrode layer 132 at least one face in two opposite faces of vibrating diaphragm 134 with may be provided with array of protrusions
Structure.The present invention is not limited the depression and raised species, quantity that are included in array of protrusions structure, those skilled in the art
Depression included in array of protrusions structure and raised type and quantity can be flexibly set.Such as：Array of protrusions structure is
Multiple salient points are formed according to rectangle or diamond array, or are arranged at least one table according to geometry for multiple banded structures
In the both sides in face, corner, edge or whole surface.Wherein, dot shape can be cylinder, four prism type or rectangular pyramid
Shape etc.；Banded structure can arrange according to the array of shapes of well word, fork word, zebra line style, cross or mouth word.
According to provided by the invention from early warning gas sensor, enclosure interior forms gas channel, and by multiple gas senses
Survey element to be arranged in housing, when air-flow enters gas channel by air inlet, gas-sensing element produces because of airflow function
Corresponding electric signal.The above-mentioned of the present invention can be applied to the fields such as medical gas measurement from early warning gas sensor, such as to mist
Change the measurement of the medical gas in treatment, should not only have sensitivity and accuracy rate height, structure and system from early warning gas sensor
Make that technique is simple, cost is cheap, the advantages of being adapted to large-scale industrial production, and according to caused by multiple gas-sensing elements
Electric signal can easily know whether gas-sensing element is in abnormality, obtain the technique effect from early warning, so as to
It is repaired or replaced in time by user, helps to extend the service life of gas sensor.In addition, work as gas-sensing element
Friction space when being confined space, additionally it is possible to help avoid air-flow characteristic in itself or humidity etc. and the output of electric signal made
Into influence.
The alarm module being previously mentioned in the present invention is by hard-wired circuit, for example, alarm module can include comparing
Device, loudspeaker and/or LED etc..Although alarm module may be integrated with software, the claimed present invention is integrated software
The hardware circuit of corresponding function, rather than just software in itself.
Finally it should be noted that be：Listed above be only the present invention specific embodiment, the technology of certain this area
The present invention can be modified by personnel and modification, if these modifications and variations belong to the claims in the present invention and its equivalent skill
Within the scope of art, protection scope of the present invention is considered as.
Claims (12)
- It is 1. a kind of from early warning gas sensor, it is characterised in that including：End cap, housing and multiple gas-sensing elements；Wherein,The end cap is arranged at the top of the housing, and gas outlet is offered on the end cap；The housing includes side wall and bottom surface, offering air inlet on the bottom surface of the housing, the housing has hollow structure To form gas channel, the gas channel connects with the air inlet and the gas outlet, to cause air flow through the air inlet Mouth enters the gas channel and flowed out by the gas outlet；The multiple gas-sensing element is arranged in the housing；When air-flow enters the gas channel by the air inlet When, the gas-sensing element is because of electric signal corresponding to airflow function generation.
- It is 2. according to claim 1 from early warning gas sensor, it is characterised in that to be provided with the side wall of the housing more Individual fixed component, the multiple fixed component are used to the multiple gas-sensing element being fixed in the housing.
- It is 3. according to claim 2 from early warning gas sensor, it is characterised in that the fixed component is strip projection； The strip projection is formed prominent for the inner surface of the side wall from the side wall of the housing to inner side depression and in the housing Shape thing；Each gas-sensing element is fastened between two strip projections.
- It is 4. according to claim 1 from early warning gas sensor, it is characterised in that the gas-sensing element includes：Bottom Seat frame body and be embedded into inside the base frames body and the metal electrode layer, annular gasket and the vibrating diaphragm that are cascading； Wherein,Inner surface of one side of the metal electrode layer away from the annular gasket close to the side wall of the housing；The metal electricity It is separated between pole layer and the vibrating diaphragm by the annular gasket to form friction space；The subregion of the vibrating diaphragm is exposed in the gas channel by the base framework；It is described under airflow function Vibrating diaphragm and the metal electrode layer friction and the corresponding electric signal of generation；The metal electrode layer is the gas-sensing element Electrical signal.
- It is 5. according to claim 4 from early warning gas sensor, it is characterised in that to be shaken in the metal electrode layer with described The friction space formed between film is confined space.
- It is 6. according to claim 1 from early warning gas sensor, it is characterised in that described also to be wrapped from early warning gas sensor Include：Alarm module；The alarm module is arranged on the end cap, for when any gas-sensing element is in abnormality, sending announcement Alert signal.
- It is 7. according to claim 6 from early warning gas sensor, it is characterised in that the alarm module is additionally operable to：Judge The difference that whether there is in the multiple gas-sensing element between electric signal caused by least two gas-sensing elements is big In the first preset signals threshold value, if so, then sending alarm signal.
- It is 8. according to claim 6 from early warning gas sensor, it is characterised in that the alarm module is additionally operable to：Judge It is less than second with the presence or absence of electric signal caused by least one gas-sensing element in the multiple gas-sensing element to preset Signal threshold value, if so, then sending alarm signal.
- It is 9. according to claim 4 from early warning gas sensor, it is characterised in that multiple letters are additionally provided with the end cap Number exit；Signal output part of the multiple signal exit respectively with the multiple gas-sensing element is connected, for drawing Go out electric signal caused by the multiple gas-sensing element.
- 10. according to claim any one of 1-9 from early warning gas sensor, it is characterised in that the material of the housing For conductive material, insulating barrier is additionally provided with the inner surface of the side wall of the housing.
- It is 11. according to claim 4 from early warning gas sensor, it is characterised in that the metal electrode layer shakes with described Array of protrusions structure is provided with least one face in two opposite faces of film.
- 12. according to claim 4 or 11 from early warning gas sensor, it is characterised in that the material of the vibrating diaphragm is selected from Polydimethylsiloxanefilm film, Kapton, polyvinylidene difluoride film, aniline formaldehyde resin film, polyoxymethylene film, second Base cellophane, polyamide film, melamino-formaldehyde film, poly (ethylene glycol) two acid ester film, cellophane, fiber Plain acetate films, polyethylene glycol adipate film, polydiallyl phthalate film, fiber sponge film, poly- ammonia Ester elastomer film, styrene-acrylonitrile copolymer copolymer film, styrene-butadiene-copolymer film, staple fibre film, poly- methyl Film, methacrylic acid ester film, polyvinyl alcohol film, polyester film, polyisobutene film, polyurethane flexible sponge films, Pet film, polyvinyl butyral film, formaldehyde-phenol film, neoprene film, butadiene Propylene copolymer film, natural rubber films, polyacrylonitrile film, acrylonitrile vinyl chloride film and polyethylene the third diphenol carbonate One kind in film.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710428453.8A CN107525826A (en) | 2017-06-08 | 2017-06-08 | From early warning gas sensor |
| PCT/CN2017/119439 WO2018223674A1 (en) | 2017-06-08 | 2017-12-28 | Self-pre-warning gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710428453.8A CN107525826A (en) | 2017-06-08 | 2017-06-08 | From early warning gas sensor |
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| Publication Number | Publication Date |
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| CN107525826A true CN107525826A (en) | 2017-12-29 |
Family
ID=60748038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710428453.8A Pending CN107525826A (en) | 2017-06-08 | 2017-06-08 | From early warning gas sensor |
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| Country | Link |
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| CN (1) | CN107525826A (en) |
| WO (1) | WO2018223674A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813766A (en) * | 2019-03-26 | 2019-05-28 | 吉林大学 | A kind of gas sensor and preparation method thereof of imitative scorpion ctenii |
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| CN205547358U (en) * | 2016-02-02 | 2016-09-07 | 纳智源科技（唐山）有限责任公司 | Pneumatic sensor , air current processing apparatus and electron cigarette based on triboelectricity |
| CN206862941U (en) * | 2017-06-08 | 2018-01-09 | 纳智源科技（唐山）有限责任公司 | From early warning gas sensor |
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| US5405121A (en) * | 1994-04-29 | 1995-04-11 | Centro De Investigation Y De Estudios Avanzados Del Ipn | Apparatus to indicate the oxygen content of molten copper using the vibration signal of a graphite rod immersed into the molten metal |
| CN201514238U (en) * | 2009-09-28 | 2010-06-23 | 潍坊勤毅电子科技有限公司 | Airflow sensor |
| CN204540828U (en) * | 2015-03-23 | 2015-08-12 | 纳米新能源（唐山）有限责任公司 | Diaphragm type pneumatic transmitter, airflow treatment device and electronic cigarette |
| CN105982361B (en) * | 2016-03-16 | 2019-01-22 | 纳智源科技（唐山）有限责任公司 | Pneumatic transmitter, airflow treatment device and electronic cigarette based on triboelectricity |
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| US20100094111A1 (en) * | 1998-04-30 | 2010-04-15 | Abbotte Diabetes Care Inc. | Analyte Monitoring Device and Methods of Use |
| CN205547358U (en) * | 2016-02-02 | 2016-09-07 | 纳智源科技（唐山）有限责任公司 | Pneumatic sensor , air current processing apparatus and electron cigarette based on triboelectricity |
| CN206862941U (en) * | 2017-06-08 | 2018-01-09 | 纳智源科技（唐山）有限责任公司 | From early warning gas sensor |
Cited By (2)
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| CN109813766A (en) * | 2019-03-26 | 2019-05-28 | 吉林大学 | A kind of gas sensor and preparation method thereof of imitative scorpion ctenii |
| CN109813766B (en) * | 2019-03-26 | 2021-06-29 | 吉林大学 | Scorpion comb tooth-imitated gas sensor and preparation method thereof |
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| WO2018223674A1 (en) | 2018-12-13 |
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