CN103264674A - Seat passenger occupation sensor - Google Patents
Seat passenger occupation sensor Download PDFInfo
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- CN103264674A CN103264674A CN2013101955481A CN201310195548A CN103264674A CN 103264674 A CN103264674 A CN 103264674A CN 2013101955481 A CN2013101955481 A CN 2013101955481A CN 201310195548 A CN201310195548 A CN 201310195548A CN 103264674 A CN103264674 A CN 103264674A
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- insulating barrier
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- seat occupant
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Abstract
The invention discloses a seat passenger occupation sensor which comprises at least one capacitance sensing unit. The capacitance sensing unit comprises a first capacitance pole plate, an elastic space interval layer and a second capacitance pole plate. The elastic space interval layer is laminated on the lower side of the first capacitance pole plate, and a hollow hole is formed in the elastic space interval layer. The second capacitance pole plate is laminated on the lower side of the elastic space interval layer. The first capacitance pole plate and the second capacitance pole plate are used for being connected with an external electric loop, and an electric switch loop is formed. The seat passenger occupation sensor has the characteristic of the dot-shaped capacitance sensing unit and can carry out point-by-point detection more accurately on existing characters of the human body in a detection zone.
Description
Technical field
The present invention relates to the automotive seat technical field, more particularly, relate to a kind of seat occupant and take sensor.
Background technology
Along with developing rapidly of modern automobile safety method, the safety air bag of vehicle protecting human body control human body recognition technology more accurately matches.By judging the existence of occupant's human body on the seat, can more effectively control inhibition and the expansion of safety air bag.By the effective judgement to occupant's human body weight on the seat, cooperate corresponding classification airbag deployment control, can realize occupant's cascade protection more accurately, can realize higher occupant safety guarantee during vehicle collision accident.
The sensing technology of occupant's recognition system in the past adopts usually and touches the judgement that human body electric switch technology is carried out the seat occupant existence.When human body weight was exerted pressure on the seat, switch contact contact conducting was sent the occupied signal of seat to the relevant vehicle body circuit of extroversion.Yet this type of switching mode human body sensor be usually owing to can't distinguish the difference of human body and seat weight, and usually produces false judgment, causes the output of system's generation off-square seat occupancy state.
Another kind of novel condenser human sensing system is in the application of field of vehicle seats, can see that application number is the relevant introduction of 201210407385.4 Chinese patent.Come from the judgement of the dielectric property of seat one side by large-area plate capacitance sensing electrode pair, this type of sensor utilizes human body to contain the electrolytical existence of body fluid of metallic ion, and perception exists as the seat occupant of life object effectively.Can identify the differentiation between human body and the non-life object better, realize that more accurately there is judgement in human body.
Yet, in above-mentioned principle is introduced, because need be at the flexible sensing battery lead plate of seat internal placement large tracts of land pad shape, and this type of capacitive electrode plates usually to adopt with noble metal printing ink be the conducting film technology of printing material, this just usually causes the serious rising of this type of cost of product.Simultaneously, single large-area flat-plate type capacitance electrode sensing also is difficult to the carrying out of seat human body body weight type judged more accurately.
Therefore, how can the human body of institute's search coverage be existed feature to carry out more accurate pointwise and survey, be the present technical issues that need to address of those skilled in the art.
Summary of the invention
In view of this, the invention provides a kind of seat occupant and take sensor, to realize that can exist feature to carry out more accurate pointwise to the human body of institute's search coverage surveys.
For achieving the above object, the invention provides following technical scheme:
A kind of seat occupant takies sensor, comprises at least one capacitance sensing unit, and described capacitance sensing unit comprises:
First capacitor plate;
Be laminated in the elastic space wall of the described first capacitor plate downside, offer hollow bore on the described elastic space wall;
Be laminated in second capacitor plate of described elastic space wall downside, described first capacitor plate is used for being connected with the external electrical loop with described second capacitor plate, constitutes the electric switch loop.
Preferably, take in the sensor at above-mentioned seat occupant, described first capacitor plate comprises the first compliant conductive layer and has first insulating barrier and second insulating barrier of electrical isolation feature that described first insulating barrier and second insulating barrier are laminated in the both sides of the described first compliant conductive layer respectively;
Described second capacitor plate is by the second compliant conductive layer and the 3rd insulating barrier and the 4th insulating barrier with electrical isolation feature, and described the 3rd insulating barrier and the 4th insulating barrier are laminated in the both sides of the described second compliant conductive layer respectively.
Preferably, take in the sensor at above-mentioned seat occupant, described first insulating barrier and the 3rd insulating barrier are the insulating gel of polyester insulated film, polyimide insulative film, coating or the insulation coating lacquer of coating.
Preferably, take in the sensor at above-mentioned seat occupant, described second insulating barrier is positioned at the outside of the described first compliant conductive layer, and described the 4th insulating barrier is positioned at the outside of the described second compliant conductive layer;
Described second insulating barrier and the 4th insulating barrier are the insulating gel of polyester insulated film, polyimide insulative film, coating or the insulation coating lacquer of coating.
Preferably, take in the sensor at above-mentioned seat occupant, described first capacitor plate and described second capacitor plate are in the position of described hollow bore and are arranged in parallel.
Preferably, take in the sensor at above-mentioned seat occupant, described elastic space wall is spongy layer, elastomeric nonwoven carpet veneer or partition adjustable tissue layer.
Preferably, take in the sensor at above-mentioned seat occupant, the outer shape of described capacitance sensing unit is circle, strip shape, polygon or flexagon.
Preferably, take in the sensor at above-mentioned seat occupant, the shape of described hollow bore can be circle, strip shape, polygon or flexagon.
Preferably, take in the sensor at above-mentioned seat occupant, the described hollow bore of each described capacitance sensing unit is one or more.
Preferably, take in the sensor the corresponding one or more described capacitance sensings of described hollow bore unit at above-mentioned seat occupant.
From above-mentioned technical scheme as can be seen, seat occupant provided by the invention takies sensor, the elastic space wall has the space compressibility, when the human buttock exerted pressure at this place, capacitance sensing unit, two capacitor plates (first capacitor plate and second capacitor plate) up and down of this capacitance sensing unit were pressed closely through the hollow bore place of elastic space wall.When local pressure was enough big, two capacitor plates can realize that in theory mutual distance is infinitely approaching up and down, and namely spacing distance convergence each other is zero.So, the present invention is achieved the activation characteristic that more strengthens.Shape and the area of the hollow bore by adjusting the elastic space wall can realize that different force exerts pressure down, up and down two mutual convergences of capacitor plate and the responsibility that can contact.And exert pressure when withdrawing as this capacitance sensing unit human buttock of place, under the effect of elastic space wall, the distance between two capacitor plates can revert to old interval state up and down.The present invention has point-like capacitive sensing element characteristic, can exist feature to carry out more accurate pointwise to the human body of institute's search coverage and survey.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiment of this name, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The sectional structure scheme drawing of the capacitance sensing unit that Fig. 1 provides for the embodiment of the invention;
Sectional structure scheme drawing under the capacitance sensing unit strained condition that Fig. 2 provides for the embodiment of the invention;
The structural representation of the human body engaged position sensor that Fig. 3 provides for the embodiment of the invention.
The specific embodiment
The invention discloses a kind of seat occupant and take sensor, to realize that can exist feature to carry out more accurate pointwise to the human body of institute's search coverage surveys.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
See also Fig. 1-Fig. 3, the sectional structure scheme drawing of the capacitance sensing unit that Fig. 1 provides for the embodiment of the invention; Sectional structure scheme drawing under the capacitance sensing unit strained condition that Fig. 2 provides for the embodiment of the invention; The structural representation of the human body engaged position sensor that Fig. 3 provides for the embodiment of the invention.
The seat occupant that the embodiment of the invention provides takies sensor, comprises at least one capacitance sensing unit 10, and described capacitance sensing unit 10 comprises first capacitor plate 20, elastic space wall 40 and second capacitor plate 30.
Wherein, elastic space wall 40 is laminated in the downside of described first capacitor plate 20, offers hollow bore 41 on the described elastic space wall 40.Second capacitor plate 30 is laminated in the downside of described elastic space wall 40, and described first capacitor plate 20 is used for being connected with the external electrical loop with described second capacitor plate 30, constitutes the electric switch loop.
Size and the shape of the hollow bore 41 of elastic space wall 40 between two capacitor plates (first capacitor plate 20 and second capacitor plate 30) up and down at place, capacitance sensing unit approach distance for exerting pressure of two capacitor plates up and down and have correlativity.Suitably size and the shape of the hollow bore 41 of control elastic space wall 40 can exert an influence to the human body detection sensory characteristic of this sensing point.
In the present invention's one specific embodiment, described first capacitor plate 20 comprises the first compliant conductive layer 21 and has first insulating barrier 22 and second insulating barrier 23 of electrical isolation feature that described first insulating barrier 22 and second insulating barrier 23 are laminated in the both sides of the described first compliant conductive layer 21 respectively.
It is favourable being enclosed in the conductive material layer between two insulating barrier, and it can prevent from being subjected to the disturbing influence that the space medium layer is subjected to causing such as air humidity varies between two capacitor plates dielectric property changes effectively.
When acting on 10 zones, capacitance sensing unit such as external force such as human body stern pressures, elastomeric space interval layer 40 compressed attenuation under pressure, thickness becomes d1 by d0.Simultaneously, at hollow bore 41 places, first capacitor plate 20, second capacitor plate 30 more by the pressure effect to being bordering on or reaching mutual applying, herein the first compliant conductive layer 21 of first capacitor plate 20, and the second compliant conductive layer 31 of second capacitor plate 30 between spacing distance further be contracted to d2.
Because between metastable two electrodes of profile, capacitance depends on dielectric properties, the two distance between electrodes d of intermediate isolating wall and air.(capacity of parallel plate capacitor C is directly proportional with DIELECTRIC CONSTANTS, follow over against area to become the S direct ratio, and the spacing distance d between pole plate is inversely proportional to) computing formula is as follows:
C=εS/d
(ε=ε
0* ε
r, ε wherein
rBe the relative dielectric constant of medium, ε
0Be the specific inductance capacity of vacuum).
Be appreciated that the d2 distance value can be rendered as minimal value when first insulating barrier 22 with electrical isolation feature, the 3rd insulating barrier 32 are rendered as thin as a wafer feature, level off to zero.Accordingly, the capacitance at 10 places, capacitance sensing unit also just can be rendered as the maximum value state.
Therefore, when having capacitance sensing block construction 10 pressurizeds of hollow bore 41, the wide variation of the easier generation capacitance of meeting.
Be appreciated that the size variation that cooperates different apertures, under the pressured state, the degree that is easy to each other fit also can respective change between first capacitor plate 20, second capacitor plate 30.Perforate is more big, and the two easier pressurized is fitted; Otherwise the two is fitted then needs bigger pressure effect.
The compress variation of the elastic space wall 40 of elastically deformable is also assisted the effect that increases capacitance variation when having played pressurized.Simultaneously, its can pressurized in the characteristics of compression deformation, help pressurized between hollow bore 41 places first capacitor plate 20, second capacitor plate 30 to press close to and fit more.
Two capacitor plates up and down at 10 places, capacitance sensing unit should have flexible characteristic, can issue in the external force effect of exerting pressure and give birth to corresponding elastic deformation and restitution.The capacitor plate material can be independent or compound conducting film, as is attached to gold, silver, copper, aluminium or carbon film material conductive layer etc. on the insulation films such as polyester, polyimide.
In the present embodiment, described first insulating barrier 22 and the 3rd insulating barrier 32 are polyester insulated film or polyimide insulative film, perhaps are the insulating gel of coating or the insulation coating lacquer of coating.Described second insulating barrier 23 is positioned at the outside of the described first compliant conductive layer 21, and described the 4th insulating barrier 33 is positioned at the outside of the described second compliant conductive layer 31; Described second insulating barrier 23 and the 4th insulating barrier 33 are the insulating gel of polyester insulated film, polyimide insulative film, coating or the insulation coating lacquer of coating.
Further, described first capacitor plate 20 and described second capacitor plate 30 are in the position of described hollow bore 41 and are arranged in parallel.Described elastic space wall 40 is spongy layer, elastomeric nonwoven carpet veneer or partition adjustable tissue layer.
Further, the outer shape of described capacitance sensing unit 10 is circle, strip shape, polygon or flexagon.The shape of described hollow bore 41 can be circle, strip shape, polygon or flexagon.
A kind of simplification usage of the present invention is: the elastic space wall 40 between two capacitor plates also can be rendered as non-resilient feature up and down.Namely be rendered as the non-obvious elastic compression feature that only has hollow bore 41, as the thick layer of cloth of densification, harder plastic foamed layer etc.
The another kind of usage of simplifying of the present invention is: when two capacitor plates are rendered as large tracts of land adagio shape structure up and down (the visual larger area point-like character that is all), can arrange the hollow bore 41 of and more than one elastic space wall 40 equally with distribution.Can play equally and strengthen different force and exert pressure down, up and down two mutual convergences of capacitor plate and the responsibility that can contact.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a seat occupant takies sensor, it is characterized in that, comprises at least one capacitance sensing unit (10), and described capacitance sensing unit (10) comprising:
First capacitor plate (20);
Be laminated in the elastic space wall (40) of described first capacitor plate (20) downside, offer hollow bore (41) on the described elastic space wall (40);
Be laminated in second capacitor plate (30) of described elastic space wall (40) downside, described first capacitor plate (20) is used for being connected with the external electrical loop with described second capacitor plate (30), constitutes the electric switch loop.
2. seat occupant as claimed in claim 1 takies sensor, it is characterized in that, described first capacitor plate (20) comprises the first compliant conductive layer (21) and has first insulating barrier (22) and second insulating barrier (23) of electrical isolation feature that described first insulating barrier (22) and second insulating barrier (23) are laminated in the both sides of the described first compliant conductive layer (21) respectively;
Described second capacitor plate (30) is by the second compliant conductive layer (31) and the 3rd insulating barrier (32) and the 4th insulating barrier (33) with electrical isolation feature, and described the 3rd insulating barrier (32) and the 4th insulating barrier (33) are laminated in the both sides of the described second compliant conductive layer (31) respectively.
3. seat occupant as claimed in claim 2 takies sensor, it is characterized in that, described first insulating barrier (22) and the 3rd insulating barrier (32) are the insulating gel of polyester insulated film, polyimide insulative film, coating or the insulation coating lacquer of coating.
4. seat occupant as claimed in claim 2 takies sensor, it is characterized in that, described second insulating barrier (23) is positioned at the outside of the described first compliant conductive layer (21), and described the 4th insulating barrier (33) is positioned at the outside of the described second compliant conductive layer (31);
Described second insulating barrier (23) and the 4th insulating barrier (33) are the insulating gel of polyester insulated film, polyimide insulative film, coating or the insulation coating lacquer of coating.
5. seat occupant as claimed in claim 1 takies sensor, it is characterized in that, described first capacitor plate (20) and described second capacitor plate (30) are in the position of described hollow bore (41) and are arranged in parallel.
6. seat occupant as claimed in claim 1 takies sensor, it is characterized in that, described elastic space wall (40) is spongy layer, elastomeric nonwoven carpet veneer or partition adjustable tissue layer.
7. take sensor as each described seat occupant of claim 1-6, it is characterized in that, the outer shape of described capacitance sensing unit (10) is circle, strip shape, polygon or flexagon.
8. seat occupant as claimed in claim 7 takies sensor, it is characterized in that, the shape of described hollow bore (41) can be circle, strip shape, polygon or flexagon.
9. take sensor as each described seat occupant of claim 1-6, it is characterized in that, the described hollow bore (41) of each described capacitance sensing unit (10) is one or more.
10. take sensor as each described seat occupant of claim 1-6, it is characterized in that, the corresponding one or more described capacitance sensings unit (10) of described hollow bore (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101955481A CN103264674A (en) | 2013-05-23 | 2013-05-23 | Seat passenger occupation sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101955481A CN103264674A (en) | 2013-05-23 | 2013-05-23 | Seat passenger occupation sensor |
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| CN103264674A true CN103264674A (en) | 2013-08-28 |
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| CN2013101955481A Pending CN103264674A (en) | 2013-05-23 | 2013-05-23 | Seat passenger occupation sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104063992A (en) * | 2014-06-28 | 2014-09-24 | 浙江吉利控股集团有限公司 | Auxiliary driving side instrument platform surface object detection alarm device |
| CN104297801A (en) * | 2014-09-24 | 2015-01-21 | 昆山腾朗电子有限公司 | Automotive sensor |
| CN105806517A (en) * | 2016-05-04 | 2016-07-27 | 深圳诺康医疗设备股份有限公司 | Pressure sensor |
| CN107432613A (en) * | 2017-07-24 | 2017-12-05 | 深圳市翰群医疗器材有限公司 | A kind of pliable pressure sensor mat and preparation method |
| WO2020187190A1 (en) * | 2019-03-15 | 2020-09-24 | Babi Limited | A load operable switch device and a switch system |
| CN112009485A (en) * | 2019-05-13 | 2020-12-01 | 现代自动车株式会社 | Passenger identification device for vehicle |
| CN113183909A (en) * | 2021-04-20 | 2021-07-30 | 安闻汽车技术(天津)有限公司 | Vehicle-mounted child safety seat and vehicle-mounted child sensing and detecting device and method |
| WO2022057340A1 (en) * | 2020-09-16 | 2022-03-24 | 长鑫存储技术有限公司 | Wafer transfer apparatus |
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| US6448789B1 (en) * | 1999-11-24 | 2002-09-10 | W.E.T. Automotive System, Ag Aktiengesellschaft | Detector device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104063992A (en) * | 2014-06-28 | 2014-09-24 | 浙江吉利控股集团有限公司 | Auxiliary driving side instrument platform surface object detection alarm device |
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| CN105806517A (en) * | 2016-05-04 | 2016-07-27 | 深圳诺康医疗设备股份有限公司 | Pressure sensor |
| CN107432613A (en) * | 2017-07-24 | 2017-12-05 | 深圳市翰群医疗器材有限公司 | A kind of pliable pressure sensor mat and preparation method |
| WO2020187190A1 (en) * | 2019-03-15 | 2020-09-24 | Babi Limited | A load operable switch device and a switch system |
| CN112009485A (en) * | 2019-05-13 | 2020-12-01 | 现代自动车株式会社 | Passenger identification device for vehicle |
| WO2022057340A1 (en) * | 2020-09-16 | 2022-03-24 | 长鑫存储技术有限公司 | Wafer transfer apparatus |
| CN113183909A (en) * | 2021-04-20 | 2021-07-30 | 安闻汽车技术(天津)有限公司 | Vehicle-mounted child safety seat and vehicle-mounted child sensing and detecting device and method |
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Application publication date: 20130828 |