CN105092114A - Pressure sensor, intelligent shoe pad, intelligent shoe, and manufacturing method of pressure sensor - Google Patents
Pressure sensor, intelligent shoe pad, intelligent shoe, and manufacturing method of pressure sensor Download PDFInfo
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- CN105092114A CN105092114A CN201510208918.XA CN201510208918A CN105092114A CN 105092114 A CN105092114 A CN 105092114A CN 201510208918 A CN201510208918 A CN 201510208918A CN 105092114 A CN105092114 A CN 105092114A
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Abstract
Provided is a pressure sensor including a carrier film, a positive electrode, a piezoelectric film, and a negative electrode, the carrier film includes a first part and a second part that are mutually connected, the carrier film is oppositely folded to make the first part and the second part laminate, the piezoelectric film is sandwiched between the first part and the second part, the positive electrode is arranged at one side, adjacent to piezoelectric film, of the first part, and the negative electrode is arranged at one side, adjacent to piezoelectric film, of the second part. The pressure sensor can form the positive electrode and the negative electrode on the unfolded carrier film at first, and then the carrier film is oppositely folded to make the first part and the second part laminate, and the piezoelectric film is sandwiched between the first part and the second part, so that the production and manufacturing process is simple. The invention further provides a method for manufacturing the pressure sensor, the production and manufacturing process is simple and easy to carry out.
Description
Technical field
The present invention relates to smart machine field, particularly relate to the method for making of a kind of pressure transducer, Intelligent insole, intelligent shoe and pressure transducer.
Background technology
In recent years intelligent artifact and Intelligent wearable production development rapid, except Intelligent bracelet and intelligent watch, present lot of domestic and international research and development institution and company are also at developing intellectual resource footwear and Intelligent insole product, its product is mainly integrated with the motion sensor such as acceleration transducer, gyroscope and pressure transducer, some data when people move can be obtained by these sensors, allow people understand the parameters such as the amount of exercise of oneself.
At present, the pressure transducer that intelligent shoe and Intelligent insole generally adopt is piezoresistive pressure sensor, its cost is higher, thickness is larger, not soft, and in application, the multiple pressure transducer of general employing forms array, and its signal connects inconvenient, manufacturing process is complicated, is also unfavorable for the assembling of large batch of production and follow-up intelligent shoe and Intelligent insole.
Summary of the invention
Based on this, the invention provides the method for making of the simple pressure transducer of a kind of manufacturing process, Intelligent insole, intelligent shoe and pressure transducer.
A kind of pressure transducer, comprises carrier thin film, positive electrode, piezoelectric membrane and negative electrode; Described carrier thin film comprises interconnective first and second, described carrier thin film doubling and make described first and described second stacked, and described piezoelectric membrane is located between described first and described second; Described positive electrode is located at described first upper side adjacent with described piezoelectric membrane, and described negative electrode is located at described second upper side adjacent with described piezoelectric membrane.
Wherein in an embodiment, described positive electrode and described negative electrode are set to multiple respectively, and its one_to_one corresponding; Parallel with one another between each described positive electrode; Each described negative electrode is connected successively.
Wherein in an embodiment, described first and described second is roughly mankind's sole shape; The forefoot place of described first is provided with 3 described positive electrodes; Middle part is provided with 1 described positive electrode; Heel place is provided with 2 described positive electrodes; The position one_to_one corresponding of the described positive electrode on the setting position of the described negative electrode on described second and described first.
Wherein in an embodiment, described positive electrode, described negative electricity are very formed at the conductive pattern on described carrier thin film; Described conductive pattern can be the circle of solid circle or lattice or the circle comprising multiple parallel striped pattern.
Wherein in an embodiment, also comprise screen layer; Described screen layer is positioned at the side of described carrier thin film away from described piezoelectric membrane; Described carrier thin film offers the first via; Described first via is arranged between described screen layer and described second of described carrier thin film, and is communicated with the described negative electrode on described screen layer and described second.
Wherein in an embodiment, also comprise conducting terminal, the second via and conducting wire; Each described positive electrode is connected with described conducting terminal respectively by a described conducting wire, and all described negative electrodes are connected with described conducting terminal by conducting wire described in same; Described second via is opened on described first of described carrier thin film, described negative electrode is led to described first by described first via and described screen layer, thus described negative electrode is connected to described conducting terminal.
A kind of Intelligent insole, comprises above-mentioned force snesor.
A kind of intelligent shoe, comprises above-mentioned pressure transducer.
A method for making for pressure transducer, comprises step:
Carrier thin film is provided, and forms positive electrode and negative electrode in the side of carrier thin film;
By folding on carrier thin film, make to define positive electrode relative with the side of negative electrode, and make first of positive electrode place stacked with second of negative electrode place; Piezoelectric membrane to be located between first and second and to bind.
Wherein in an embodiment, describedly provide carrier thin film, and after the step that the side of carrier thin film forms positive electrode and negative electrode, described by folding on carrier thin film, make to define positive electrode relative with the side of negative electrode, and make second of first of positive electrode place and negative electrode place stacked; Before piezoelectric membrane being located in the step of also binding between first and second, also comprise step:
The side that carrier thin film do not form positive electrode and negative electrode forms screen layer; And on second of negative electrode place, make the first via being communicated with negative electrode and screen layer;
Describedly make to define positive electrode relative with the side of negative electrode by folding on carrier thin film, and make first of positive electrode place stacked with second of negative electrode place; After piezoelectric membrane being located in the step of also binding between first and second, also comprise step:
The pressure transducer of corresponding mankind's sole shape is cut out according to different sizes.
The method for making of above-mentioned pressure transducer, Intelligent insole, intelligent shoe and pressure transducer can prior to the carrier thin film of expansion forms positive electrode and negative electrode, then carrier thin film doubling can be made first and second stacked, and piezoelectric membrane is located between first and second, manufacturing process is simple.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of an embodiment of pressure transducer of the present invention;
The deployed configuration schematic diagram that Fig. 2 is the pressure transducer shown in Fig. 1;
The positive electrode of Fig. 3 for the pressure transducer shown in Fig. 1, the conductive pattern of negative electrode;
Fig. 4 is the schematic flow sheet of an embodiment of the manufacture method of pressure transducer of the present invention;
Fig. 5 is the schematic flow sheet of another embodiment of the manufacture method of pressure transducer of the present invention.
Embodiment
For making object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that embodiment described herein only in order to explain the present invention, do not limit protection scope of the present invention.
As depicted in figs. 1 and 2, the pressure transducer of an embodiment, comprises carrier thin film 10, positive electrode 30, piezoelectric membrane 50 and negative electrode 70.Carrier thin film 10 comprises interconnective first 13 and second 17, carrier thin film 10 doubling and make its first 13 and second 17 stacked, and piezoelectric membrane 50 is located between first 13 and second 17.Positive electrode 30 is located at side adjacent with piezoelectric membrane 50 on first 13, and negative electrode 70 is located at side adjacent with piezoelectric membrane 50 on second 17.
When piezoelectric membrane 50 is under pressure effect, convert pressure signal to electric signal, and by the positive electrode 30 on be located at carrier thin film 10 first 13 be located at this electric signal of circuit transmission that the negative electrode 70 on second 17 of carrier thin film 10 formed.Due in above-mentioned pressure transducer, can prior to the carrier thin film 10 of expansion forms positive electrode 30 and negative electrode 70, then carrier thin film 10 doubling can be made first 13 and second 17 stacked, and piezoelectric membrane 50 is located between first 13 and second 17, its manufacturing process is simple; And because carrier thin film 10 adopts the mode of doubling to form first 13 and second 17, and positive electrode 30 and negative electrode 70 are positioned at carrier thin film 10 inside, and therefore piezoelectric sensor entirety only has side to need to do water-proofing treatment, conveniently realizes water-proof function.
Carrier thin film 10 is made primarily of PET (PolyethyleneTerephthalate, polyethylene terephthalate) material.In the present embodiment, carrier thin film 10 is macromolecule plastic film.First 13 and second 17 is roughly mankind's sole shape.The middle part of first 13 and second 17 all offers mutually corresponding opening 15, the interior recess of the corresponding sole of this opening 15.
The thickness of piezoelectric membrane 50 is tens to one hundred microns.Piezoelectric membrane 50 is primarily of PP (PropenePolymer, polypropylene), FEP/PTFE (FluorinatedEthylenePropylene, fluorinated ethylene propylene/PolyTetraFluoroEthylene, teflon) material such as composite membrane is made by special process, and it is the membraneous material with piezoelectric effect.Therefore, piezoelectric membrane 50 can convert pressure signal to electric signal.Particularly, piezoelectric membrane 50 is piezo-electric electret thin film.Positive electrode 30 and negative electrode 70 are that conductive material is formed by printing mode, further simplify the manufacturing process of pressure transducer.
Wherein in an embodiment, positive electrode 30 and negative electrode 70 are set to multiple respectively, and its one_to_one corresponding.The position of positive electrode 30 and negative electrode 70 according to human foot in daily life main stress point design.In the present embodiment, the forefoot place of first 13 is provided with 3 positive electrodes 30; Middle part is provided with 1 positive electrode 30; Heel place is provided with 2 positive electrodes 30.The position one_to_one corresponding of the positive electrode 30 on the setting position of the negative electrode 70 on second 17 and first 13.So, make the simplicity of design of pressure transducer, but the needs gathering main pressurized force can be met.
Wherein in an embodiment, parallel with one another between each positive electrode 30, each negative electrode 70 is connected successively.
Wherein in an embodiment, pressure transducer also comprises conducting terminal 40 and conducting wire 80, and each positive electrode 30 is connected with conducting terminal 40 respectively by a conducting wire 80, and all negative electrodes 70 are connected with conducting terminal 40 by same conducting wire 80.In the present embodiment, conducting terminal 40 is arranged at opening 15 place.Particularly, conducting terminal 40 comprises the protrusion tab from the projection outwardly of carrier thin film 10 edge, and conducting wire 80 extends to described protrusion tab thus forms conducting terminal 40.Further, conducting terminal also comprises a reinforced sheet being arranged at protrusion tab to increase the intensity of conducting terminal 40, thus increases the times of capable of being inserted and pulled out (not shown).Conducting terminal 40 comprises silver coating, to reduce contact resistance.Conducting wire 80 all comprises one deck insullac, to protect conducting wire 80, prevents short circuit.Further, nm waterproof material process is done in conducting wire 80, to protect conducting wire 80 further.
When piezoelectric membrane 50 is stressed effect, can the pressure signal of different size be converted to different electric signal.Negative electrode 70 on positive electrode 30 on first 13 of carrier thin film 10 and second 17 of carrier thin film 10 by this electrical signal transfer to conducting terminal 40.The signaling conversion circuit and signal processing chip that are connected rear end by connector (not shown) are processed by conducting terminal 40.
Particularly, positive electrode 30, negative electrode 70 are for being formed at the conductive pattern on carrier thin film 10.Conductive pattern is the pattern be printed on by conductive material on carrier thin film 10.As shown in Figure 3, be three kinds of different conductive patterns.Conductive pattern in Fig. 3 (a) is solid circle, and in this embodiment, the density that conductive material is printed is large, thus adopt this conductive pattern do positive electrode 30, negative electrode 70 Sensitivity in Pressure Sensors high.Conductive pattern in Fig. 3 (c) is the circle of lattice, in this embodiment, conductive material print density less, therefore adopt this conductive pattern do positive electrode 30, negative electrode 70 Sensitivity in Pressure Sensors lower.Conductive pattern in Fig. 3 (b) is the circle comprising multiple parallel striped pattern, in this embodiment, the density that conductive material is printed between solid pattern and lattice, therefore adopts this conductive pattern to make positive electrode 30, the Sensitivity in Pressure Sensors of negative electrode 70 falls between.Understandably, conductive pattern also can be other shape of different densities according to the different Demand Design of pressure transducer to sensitivity.
Wherein in an embodiment, pressure transducer also comprises screen layer 20, and screen layer 20 is positioned at the side of carrier thin film 10 away from piezoelectric membrane 50, and namely screen layer 20 is positioned at the outermost layer of pressure transducer.Carrier thin film 10 offers the first via 60.Particularly, the first via 60 is arranged between screen layer 20 and second 17, and is communicated with the negative electrode 70 on screen layer 20 and second 17.So, can electromagnetic screen be carried out, avoid signal disturbing.
Further, above-mentioned pressure transducer also comprises the second via 90.Second via 90 is opened on first 13 of carrier thin film 10, negative electrode 70 is led to first 13 by the first via 30 and screen layer 20, thus negative electrode 70 is connected to conducting terminal 40.So, connector can be adopted flexibly, facilitate type selecting and general.Understandably, in certain embodiments, also can not arrange the second via 90, interconnective negative electrode 70 directly can be collected to conducting terminal 40 by conducting wire 80 from the edge of pressure transducer.
Above-mentioned pressure transducer can prior to the carrier thin film 10 of expansion forms positive electrode 30 and negative electrode 70, then carrier thin film 10 doubling can be made first 13 and second 17 stacked, and piezoelectric membrane 50 is located between first 13 and second 17, its manufacturing process is simple.Because piezoelectric membrane 50 is specially piezo-electric electret thin film, carrier thin film 10 is specially macromolecule plastic film, be all the material of very thin thickness, and positive electrode 30 and negative electrode 70 is conductive patterns that one deck is printed on carrier thin film 10.Therefore, above-mentioned pressure transducer thickness is less, soft.Again because each positive electrode 30 is connected with conducting terminal 40 respectively by a conducting wire 80, all negative electrodes 70 are connected with conducting terminal 40 by same conducting wire 80, above-mentioned pressure transducer connects the signaling conversion circuit of rear end by conducting terminal 40 and signal processing chip processes, thus its signal connect convenient.
The present invention also provides a kind of Intelligent insole, and it comprises above-mentioned pressure transducer.
The present invention also provides a kind of intelligent shoe, and it comprises above-mentioned pressure transducer.Be appreciated that this pressure transducer can be arranged on the shoe-pad of intelligent shoe, also can be set directly on the sole of intelligent shoe.
As shown in Figure 4, the method for making of the pressure transducer of an embodiment, comprises step:
S310: carrier thin film is provided, and form positive electrode and negative electrode in the side of carrier thin film.
In the present embodiment, by being printed on carrier thin film by conductive material, thus forming positive electrode and negative electrode, particularly, on carrier thin film, printing positive electrode and negative electrode by template.Template is mould plate good for the Position Design of plantar pressure corresponding point during human body daily routines in advance; therefore only need once to print the making that can complete all positive electrodes and negative electrode in an Intelligent insole or multiple Intelligent insole; production efficiency is higher; certainly, also a positive electrode or negative electrode can once be formed.Conductive material comprises conductive silver paste or/and electrically conductive ink.
Wherein in an embodiment, in step S310, carrier thin film is formed multiple positive electrode and multiple negative electrode and conducting wire, and it is parallel with one another between each positive electrode, each negative electrode is connected successively, each positive electrode is connected with conducting terminal respectively by a conducting wire, and all negative electrodes are connected with conducting terminal by same conducting wire, in the step that the side of carrier thin film forms positive electrode and negative electrode, form conducting wire simultaneously.Particularly, described positive electrode, negative electrode and conducting wire are for be printed on carrier thin film simultaneously.
S350: carrier thin film is folded, make to have made positive electrode, negative electrode side relative, and make second of first of positive electrode place and negative electrode place stacked, piezoelectric membrane to be located between first and second and to bind.Particularly, carrier thin film is pressed the center line doubling preset.
Particularly, binded by hot melt or bind again at plastic sheeting inner face printing glue.
As shown in Figure 5, in another embodiment, before step S310, also step is comprised:
S300: for plantar pressure corresponding point during human body daily routines Position Design and make template.
Particularly, step S300, specifically comprises step:
S301: according to the position of human foot main stress point design positive electrode and negative electrode in daily life.
In the present embodiment, as shown in Figure 2, the forefoot place of first of carrier thin film is provided with 3 positive electrodes; Middle part is provided with 1 positive electrode; Heel place is provided with 2 positive electrodes.The position one_to_one corresponding of the positive electrode on the setting position of the negative electrode on second of carrier thin film and first of carrier thin film.So, make the simplicity of design of pressure transducer, but the needs gathering main pressurized force can be met.
S303: the conductive pattern requiring design positive electrode, negative electrode according to the difference of Sensitivity in Pressure Sensors.So, the requirement of pressure transducer different sensitivity is met.
In the present embodiment, as shown in Fig. 3 (a), when sensitivity requirement is the highest, conductive pattern can be designed to all coat the solid circle that the density of conductive material is large.As shown in Fig. 3 (b) He (c), sensitivity requirement reduce time, conductive pattern can be designed to density less comprise multiple circle of parallel striped pattern or the circle of lattice.Can according to the Auto-regulating System of Density of Heavy Medium sensitivity of lines or grid.Understandably, in other embodiments, conductive pattern also can be set to other shape of different densities.
S305: the conductive pattern according to the position of described positive electrode and negative electrode and described positive electrode, negative electrode makes template.
Wherein in an embodiment, after step S310, before step S350, also comprise step:
S320: the side not forming positive electrode, negative electrode on carrier thin film forms screen layer; And on second of negative electrode place, make the first via being communicated with negative electrode and screen layer.
Particularly, screen layer is formed by layer of conductive material is printed in the side that do not form positive electrode, negative electrode on carrier thin film.
Wherein in an embodiment, before step S350, also comprise step:
S330: according to the different requirements of Sensitivity in Pressure Sensors, does bulking process and the polarization process of different technical parameters, obtains the piezoelectric membrane of different piezoelectric modulus to piezoelectric membrane.
Wherein in an embodiment, after step S350, also comprise step:
S370: make conducting terminal and and offer on first of carrier thin film and negative electrode led to first by the first via and screen layer thus the second via being connected conducting terminal and negative electrode.
Particularly, making conducting terminal in step S370 is: the protrusion tab forming projection outwardly at carrier thin film edge, is extended all conducting wires and is formed on described protrusion tab, thus forms conducting terminal.Each positive electrode is connected with conducting terminal respectively by a conducting wire, and all negative electrodes are connected with conducting terminal by same conducting wire.Further, conducting terminal can comprise the reinforced sheet that is arranged at protrusion tab, to increase the intensity of conducting terminal, thus increases the times of capable of being inserted and pulled out.This conducting terminal can be described as again FPC terminal.By the spacing of standardized designs conducting terminal, thickness and housing size, so, this conducting terminal can be connected with the connector of standard.
Further, step S370 can also comprise: carry out silver-plated process to conducting terminal, to reduce contact resistance; To the partially conductive circuit brush insullac being pooled to conducting terminal place, extend out, to prevent short circuit.
Wherein in an embodiment, after step S370, also comprise step,
S380: conservation treatment is done to conducting wire.
Particularly, step S380 comprises exposed conducting wire brushing insullac outside to protect conducting wire.Especially, step S380 also comprises: do nm waterproof material process to conducting wire, thus can realize the waterproofing design of whole pressure transducer.
Wherein in an embodiment, after step S370, also comprise step,
S390: the pressure transducer cutting out corresponding mankind's sole shape according to different sizes.
The method for making of above-mentioned pressure transducer makes positive electrode, negative electrode and conducting wire in the one side of carrier thin film; By carrier thin film has made positive electrode, negative electrode one side by the center line doubling designed, make second of first of positive electrode place and negative electrode place stacked; Its manufacturing process is simple, convenient realization.Can by design conductive pattern and/or the requirement process that piezoelectric membrane does different technical parameters being met to pressure transducer different sensitivity.In addition, designed by the doubling of plastic sheeting, be conveniently designed to the conducting terminal as FPC terminal, be convenient to connect; And design due to the doubling of plastic sheeting, waterproofing design is more easily realized.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a pressure transducer, comprises carrier thin film, positive electrode, piezoelectric membrane and negative electrode; Described carrier thin film comprises interconnective first and second, described carrier thin film doubling and make described first and described second stacked, and described piezoelectric membrane is located between described first and described second; Described positive electrode is located at described first upper side adjacent with described piezoelectric membrane, and described negative electrode is located at described second upper side adjacent with described piezoelectric membrane.
2. pressure transducer according to claim 1, is characterized in that, described positive electrode and described negative electrode are set to multiple respectively, and its one_to_one corresponding; Parallel with one another between each described positive electrode; Each described negative electrode is connected successively.
3. pressure transducer according to claim 2, is characterized in that, described first and described second is roughly mankind's sole shape; The forefoot place of described first is provided with 3 described positive electrodes; Middle part is provided with 1 described positive electrode; Heel place is provided with 2 described positive electrodes; The position one_to_one corresponding of the described positive electrode on the setting position of the described negative electrode on described second and described first.
4. pressure transducer according to claim 1, is characterized in that, described positive electrode, described negative electricity are very formed at the conductive pattern on described carrier thin film; Described conductive pattern can be the circle of solid circle or lattice or the circle comprising multiple parallel striped pattern.
5. pressure transducer according to claim 1, is characterized in that, also comprises screen layer; Described screen layer is positioned at the side of described carrier thin film away from described piezoelectric membrane; Described carrier thin film offers the first via; Described first via is arranged between described screen layer and described second of described carrier thin film, and is communicated with the described negative electrode on described screen layer and described second.
6. pressure transducer according to claim 5, is characterized in that, also comprises conducting terminal, the second via and conducting wire; Each described positive electrode is connected with described conducting terminal respectively by a described conducting wire, and all described negative electrodes are connected with described conducting terminal by conducting wire described in same; Described second via is opened on described first of described carrier thin film, described negative electrode is led to described first by described first via and described screen layer, thus described negative electrode is connected to described conducting terminal.
7. an Intelligent insole, comprises the pressure transducer described in claim 1-6 any one.
8. an intelligent shoe, comprises the pressure transducer described in claim 1-6 any one.
9. a method for making for pressure transducer, is characterized in that, comprises step:
Carrier thin film is provided, and forms positive electrode and negative electrode in the side of carrier thin film;
By folding on carrier thin film, make to define positive electrode relative with the side of negative electrode, and make first of positive electrode place stacked with second of negative electrode place; Piezoelectric membrane to be located between first and second and to bind.
10. the method for making of pressure transducer according to claim 9, is characterized in that,
Describedly provide carrier thin film, and after the step that the side of carrier thin film forms positive electrode and negative electrode, describedly make to define positive electrode relative with the side of negative electrode by folding on carrier thin film, and make first of positive electrode place stacked with second of negative electrode place; Before piezoelectric membrane being located in the step of also binding between first and second, also comprise step:
The side that carrier thin film do not form positive electrode and negative electrode forms screen layer; And on second of negative electrode place, make the first via being communicated with negative electrode and screen layer;
Describedly make to define positive electrode relative with the side of negative electrode by folding on carrier thin film, and make first of positive electrode place stacked with second of negative electrode place; After piezoelectric membrane being located in the step of also binding between first and second, also comprise step:
The pressure transducer of corresponding mankind's sole shape is cut out according to different sizes.
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| CN108742541A (en) * | 2018-06-28 | 2018-11-06 | 清华大学 | A kind of insole for testing plantar nervous arch |
| CN112294572A (en) * | 2019-07-26 | 2021-02-02 | 美宸科技股份有限公司 | Air cushion device and air cushion system for medical care |
| CN110680328A (en) * | 2019-10-22 | 2020-01-14 | 北京航空航天大学 | Plantar stress detection system, device, server, method and storage medium |
| JP2021119335A (en) * | 2020-01-30 | 2021-08-12 | 株式会社バルカー | Footwear sensing device |
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