CN112764533A - Flexible carbon strain sensor array for glove type keyboard - Google Patents
Flexible carbon strain sensor array for glove type keyboard Download PDFInfo
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- CN112764533A CN112764533A CN202011643248.1A CN202011643248A CN112764533A CN 112764533 A CN112764533 A CN 112764533A CN 202011643248 A CN202011643248 A CN 202011643248A CN 112764533 A CN112764533 A CN 112764533A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
- G06F3/014—Hand-worn input/output arrangements, e.g. data gloves
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Abstract
The invention belongs to the field of flexible nano electronic strain sensor arrays, and discloses a flexible carbon strain sensor array for a glove type keyboard. The strain sensor array is of two groups of independent symmetrical layout structures and is respectively arranged on the surfaces of two units of glove type flexible materials, each unit of strain sensor array is connected to a signal acquisition end of the unit through an electrode, each unit comprises three types of flexible sensors and comprises five pieces of first finger joint type flexible strain sensors positioned at a first finger joint of a glove, four pieces of metacarpophalangeal joint type flexible strain sensors positioned at a metacarpophalangeal joint of the glove and one piece of inter-joint type flexible strain sensor positioned between the metacarpophalangeal joint of the index finger and the metacarpophalangeal joint of the index finger, and each unit provides finger position action information for the signal acquisition end through signal change and threshold setting of each flexible strain sensor. The input method has the advantages of good compatibility with the current input habit, high portability, convenient acquisition of back-end signals and small hand area occupation ratio.
Description
Technical Field
The invention relates to the field of flexible nano electronic strain sensor arrays, in particular to a flexible carbon strain sensor array for a glove keyboard.
Background
With the development of miniaturization and portability of electronic products, higher requirements are put on the portability of various devices. Among them, the keyboard is the most important input device in the information system today. The existing physical keyboard mainly has mechanical type, thin film type and capacitance type, wherein, the mechanical keyboard is adopted at the earliest, the principle is that the input is realized by the on-off of a metal elastic sheet at the lower end caused by the pressing of a key cap with a specific key position, and the physical keyboard is characterized by good durability, fast response time, long key stroke and large working noise; the thin film type keyboard is the most adopted keyboard type at present, the principle is that after an upper key cap is pressed, a conductive adhesive material or a metal film layer below a key presses the middle isolation layer to be in contact with a circuit layer at the lowest part, so that the connection effect is achieved, and the output is realized; the capacitive keyboard is similar to a film type working principle, has the difference that the capacitive keyboard realizes input through potential capacitance change after a keycap is pressed, and is characterized by sensitive keys, long service life and no key position conflict: high cost, high selling price and poor hand feeling. It can be seen that the three have advantages and disadvantages in response speed, durability, structural complexity, noise and the like, but in the face of the requirements of the current portable electronic equipment, the problems that the traditional keyboard has larger size, higher rigidity, thicker thickness and the like due to the working principle and structural characteristics of the traditional keyboard are all unsolved, the wide application of the traditional keyboard in the current electronic equipment, especially the portable equipment such as a tablet personal computer and the like is limited, the size and weight of the keyboard are the same as those of display equipment and the like, the key stroke and the size of keys are greatly limited, and great inconvenience is brought to users.
Although some reports have introduced a soft keyboard based on a conventional keyboard structure, the volume, weight, noise and comfort level of the keyboard are all seriously insufficient, and the destructiveness of the structure in the bending and curling process can cause the serious shortage of the service life of the keyboard, and is unavoidable in principle.
Except for a traditional keyboard structure which is applied, the design of a glove type keyboard is carried out on the basis of the glove structure in the prior part, however, dynamic detection equipment such as a sensor and the like is mostly arranged at a first finger joint of the existing glove type keyboard, the pressing detection is realized at a fingertip layout pressure detection device, and the keyboard pressing is simulated, but the problems that the input quantity is small, the input value is different from the input mode of the traditional keyboard and the like exist in the prior layout, the learning cost of a user is seriously increased, the diversity of the input content is limited, and the application cannot be really realized.
Disclosure of Invention
The invention provides a flexible carbon strain sensor array for a glove type keyboard, which has the advantages of good compatibility with the current input habit, high portability, convenient acquisition of rear-end signals and small hand area occupation ratio.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the strain sensor arrays are two groups of independent symmetrical layout structures and are respectively arranged on the surfaces of two units of glove type flexible materials, each unit of strain sensor array is connected to a signal acquisition end of the unit through an electrode, the signal acquisition end is positioned at the center of the back side of a glove metacarpal bone, each unit comprises three types of flexible sensors, five pieces of first finger joint type flexible strain sensors positioned at first finger joints of the glove, four pieces of metacarpophalangeal joint type flexible strain sensors positioned at the metacarpophalangeal joints of the glove and one piece of inter-joint type flexible strain sensor positioned between the index finger metacarpophalangeal joints and the middle finger metacarpophalangeal joints of the glove are included, and each unit is used for providing finger position action information for the signal acquisition end through signal change and threshold setting of each flexible strain sensor.
Further, the flexible material is polydimethylsiloxane, polyurethane, nitrile rubber, polyamide, SEBS, leather or silica gel.
Further, the signal acquisition end is a flexible circuit board made of polyimide materials or a rigid circuit board with the size smaller than 2cm multiplied by 3 cm.
Further, the flexible sensor is a piezoresistive or capacitive type strain sensor of a carbon-based sensitive material of a flexible stretchable substrate.
Further, the carbon-based sensitive material is carbon black, graphite, graphene, carbon nano tube and C60Carbon-based materials and composite materials thereof.
Further, the substrate material is polydimethylsiloxane, Ecoflex, polyurethane, SEBS material and composite materials thereof.
Further, the electrode is made of gold and silver thin-layer materials through a vacuum evaporation or screen printing method, and the thickness of the electrode is 100-1000 nm.
The invention has the beneficial effects that:
the flexible carbon strain sensor array for the glove type keyboard has good compatibility with the current input habit, high portability, convenient acquisition of rear-end signals and small hand area occupation ratio, and has wide application prospect in the fields of wearable portable electronic equipment, intelligent equipment and the like.
Drawings
Fig. 1 is a schematic structural diagram of a flexible carbon-based strain sensor array for a glove keyboard in embodiment 1 of the present invention.
The labels in the figure are: 10-a left-hand unit first knuckle flexible strain sensor; 20-left-hand unit metacarpophalangeal joint type flexible strain sensor; 30-left-hand unit joint meta-position type flexible strain sensor; 40-a left-hand unit signal acquisition end; 50-a right-hand unit first knuckle-like flexible strain sensor; 60-right hand unit metacarpophalangeal joint type flexible strain sensor; 70-right hand unit joint meta-position type flexible strain sensor; 80-right hand unit signal acquisition end.
Detailed Description
The invention is further described with reference to the following figures and examples.
A flexible carbon strain sensor array for a glove type keyboard is of two independent symmetrical layout structures and is respectively arranged on the surfaces of two units of glove type flexible materials, each unit of strain sensor array is connected to a signal acquisition end of the unit through an electrode, the signal acquisition end is located at the center of the back side of a metacarpal bone of a glove, each unit comprises three types of flexible sensors, the three types of flexible sensors comprise five first finger joint type flexible strain sensors located at first finger joints of the glove, four metacarpophalangeal joint type flexible strain sensors located at metacarpophalangeal joints of the glove and one inter-joint type flexible strain sensor located between the metacarpophalangeal joints and the middle finger metacarpophalangeal joints, and each unit is used for providing finger position action information for the signal acquisition end through signal change and threshold setting of each flexible strain sensor. It should be noted that the names of the three types of flexible sensors are set according to the sensor functions and the position information.
On the basis, the flexible material can be selected from one of polydimethylsiloxane, polyurethane, nitrile rubber, polyamide, SEBS, leather and silica gel.
The signal acquisition end can be a flexible circuit board made of polyimide materials or a rigid circuit board with the size smaller than 2cm multiplied by 3 cm.
The flexible sensor may be a piezoresistive or capacitive strain sensor of a carbon-based sensitive material of a flexible stretchable substrate, among others.
Further alternatively, the carbon-based sensitive material can be carbon black, graphite, graphene, carbon nano tube and C60And carbon-based materials and composite materials thereof.
The substrate material can be polydimethylsiloxane, Ecoflex, polyurethane, SEBS and other materials and composite materials thereof.
Example 1
As shown in FIG. 1, the strain sensor array of the present invention is divided into two independent symmetrical layout structures of units, which are respectively laid on the surfaces of two butyronitrile gloves, wherein the left glove surface array is a left-hand unit, and the right glove surface array is a right-hand unit.
Each unit array comprises 10 flexible strain sensor elements, which are divided into three categories: the first knuckle comprises a left-hand unit first knuckle flexible strain sensor 10 and a right-hand unit first knuckle flexible strain sensor 50; metacarpophalangeal joints comprising a left-hand unit metacarpophalangeal joint flexible strain sensor 20 and a right-hand unit metacarpophalangeal joint flexible strain sensor 60; the joint space type comprises a left-hand unit joint space type flexible strain sensor 30 and a right-hand unit joint space type flexible strain sensor 70, wherein the left-hand unit array and the right-hand unit array respectively comprise five first finger joint types, four palm finger joint types and one joint space type. All flexible strain sensor elements are piezoresistive flexible strain sensors formed by reduced graphene oxide films packaged by PDMS.
Each sensor is a two-terminal device, and is connected in parallel with a signal reading output circuit, namely a left-hand signal acquisition terminal 40 or a right-hand signal acquisition terminal 80, at the center of the back side of the glove through a metal wire deposited on the surface of the glove through thermal evaporation. The metal wire is coated with an insulating protection film layer to protect the connection layout of the array, and protect the electric communication part and the external insulation part to prevent external physical and chemical interference and electric interference. Each unit is used for providing finger position action information for the signal acquisition end through signal change and threshold setting of each flexible strain sensor.
The present embodiment is implemented on the premise of the technical structure of the present invention, and a specific embodiment is given, but the scope of the present invention is not limited to the above embodiments.
The flexible carbon strain sensor array for the glove type keyboard has good compatibility with the current input habit, high portability, convenient acquisition of rear-end signals and small hand area occupation ratio, and has wide application prospect in the fields of wearable portable electronic equipment, intelligent equipment and the like.
Claims (7)
1. A flexible carbon strain sensor array for a glove keyboard is characterized in that the strain sensor array is of two groups of independent symmetrical layout structures and is respectively arranged on the surfaces of two units of glove type flexible materials, each unit of strain sensor array is connected to a signal acquisition end of the unit through an electrode, the signal acquisition end is positioned at the center of the back side of the metacarpal bones of the glove, each unit comprises three types of flexible sensors, the glove comprises five first finger joint flexible strain sensors positioned at first finger joints of the glove, four metacarpophalangeal joint flexible strain sensors positioned at metacarpophalangeal joints of the glove and one joint-intermediate flexible strain sensor positioned between the index metacarpophalangeal joint and the middle metacarpophalangeal joint, wherein each unit is used for providing finger position action information for a signal acquisition end through signal change and threshold setting of each flexible strain sensor.
2. The array of flexible carbon-based strain sensors for a glove keyboard according to claim 1, wherein the flexible material is polydimethylsiloxane, polyurethane, nitrile rubber, polyamide, SEBS, leather or silicone.
3. The array of flexible carbon-based strain sensors for a glove keyboard as claimed in claim 1, wherein the signal acquisition terminal is a flexible circuit board of polyimide material or a rigid circuit board with dimensions less than 2cm x 3 cm.
4. A flexible carbon-based strain sensor array for a glove keyboard according to claim 1, wherein the flexible sensor is a piezoresistive or capacitive type strain sensor of carbon-based sensitive material of a flexible stretchable substrate.
5. The flexible carbon-based strain sensor array for the glove keyboard as claimed in claim 4, wherein the carbon-based sensitive material is carbon black, graphite, graphene, carbon nanotube, C60Carbon-based materials and composite materials thereof.
6. The flexible carbon-based strain sensor array for the glove keyboard according to claim 4, wherein the substrate material is polydimethylsiloxane, Ecoflex, polyurethane, SEBS material and composite materials thereof.
7. The flexible carbon-based strain sensor array for the glove keyboard as claimed in claim 1, wherein the electrode is made of gold or silver thin layer material prepared by vacuum evaporation or screen printing method, and the thickness of the electrode is 100-1000 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011643248.1A CN112764533A (en) | 2020-12-30 | 2020-12-30 | Flexible carbon strain sensor array for glove type keyboard |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011643248.1A CN112764533A (en) | 2020-12-30 | 2020-12-30 | Flexible carbon strain sensor array for glove type keyboard |
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| CN112764533A true CN112764533A (en) | 2021-05-07 |
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| CN202011643248.1A Pending CN112764533A (en) | 2020-12-30 | 2020-12-30 | Flexible carbon strain sensor array for glove type keyboard |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107744194A (en) * | 2017-11-21 | 2018-03-02 | 深圳市迈步机器人科技有限公司 | A kind of gloves |
| CN107839313A (en) * | 2013-03-29 | 2018-03-27 | 新日铁住金化学株式会社 | Flexible copper-clad laminate |
| CN109901708A (en) * | 2018-12-28 | 2019-06-18 | 北京邮电大学 | A kind of flexible intelligent gloves |
-
2020
- 2020-12-30 CN CN202011643248.1A patent/CN112764533A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107839313A (en) * | 2013-03-29 | 2018-03-27 | 新日铁住金化学株式会社 | Flexible copper-clad laminate |
| CN107744194A (en) * | 2017-11-21 | 2018-03-02 | 深圳市迈步机器人科技有限公司 | A kind of gloves |
| CN109901708A (en) * | 2018-12-28 | 2019-06-18 | 北京邮电大学 | A kind of flexible intelligent gloves |
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Application publication date: 20210507 |