CN107997853B - Electronic bionic skin system - Google Patents
Electronic bionic skin system Download PDFInfo
- Publication number
- CN107997853B CN107997853B CN201610970007.5A CN201610970007A CN107997853B CN 107997853 B CN107997853 B CN 107997853B CN 201610970007 A CN201610970007 A CN 201610970007A CN 107997853 B CN107997853 B CN 107997853B
- Authority
- CN
- China
- Prior art keywords
- electronic
- signal
- circuit
- skin system
- inductance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/10—Hair or skin implants
- A61F2/105—Skin implants, e.g. artificial skin
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
Landscapes
- Health & Medical Sciences (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Dermatology (AREA)
- Cardiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Treatment Devices (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides an electronic bionic skin system. The electronic bionic skin system comprises a pressure sensing part and a signal coding part. The pressure sensing part adopts an inductive pressure sensor and comprises a supporting shell, an inductance coil and a magnetic field unit; the signal encoding section mainly includes an LC oscillating circuit, an edge detecting circuit, a frequency dividing circuit, and a differentiating circuit. When the induction coil is in a working state, external stress acts on a supporting surface of the supporting shell, the supporting surface deforms, a magnetic field unit connected with the supporting surface acts on the magnetic flux in the induction coil to change, and the inductance of the coil changes accordingly and is output as an output signal; the output inductance variation is then converted into a frequency variation of the pulsed electrical signal by the signal encoding section. Therefore, the electronic bionic skin system is further close to the function of human skin, can be compatible with the human skin, and achieves the function of direct communication with the human skin.
Description
Technical Field
The invention relates to the technical field of machine bionics, in particular to an electronic bionic skin system.
Background
Skin is a good communication between the animal body and the environment. Because of the wide variety of receptors distributed in the skin, humans typically perceive the surrounding environment (e.g., temperature, pressure, humidity, etc.) through the skin. However, skin injuries are also unavoidable due to direct contact with the external environment, and it is reported that analysis, burns, mechanical wounds and chronic diseases cause ulcers as the main cause of skin defects and loss of function. Cases requiring skin transplantation annually in China are about 300 thousands of times or more, and there are often problems of insufficient skin supply due to the dependence of autologous skin transplantation. Electronic biomimetic skin is an excellent way to solve the problem, and in recent years, is also focused by a great deal of researchers and is applied to robots, artificial prostheses and wearable devices.
Among the various functions of simulated skin, such as sensing cold, heat, pain, and mechanical effects, the realization of mechanical effects by electronic biomimetic skin is one of the most challenging tasks. At present, the sensitivity of the electronic bionic skin reported by a plurality of related documents is high, and an ant or a small piece of feather can be sensed, but when the electronic bionic skin needs to be directly connected with human skin, the electronic bionic skin senses signals and is in communication with the human skin, so that the electronic bionic skin is still difficult to be in communication with the human skin. When the human skin is stimulated by the external stimulus, the human body is usually informed to the nervous system of the human body through the frequency change of the human pulse electric signal, and the pressure sensor used for the electronic bionic skin at present generally converts the pressure change signal into the amplitude change of the electric signal, such as the amplitude change of voltage, current, impedance and the like when the external pressure stimulus is sensed by the pressure sensor, so that the electronic bionic skin cannot be directly communicated with the human skin, and the function of realizing the real skin is limited.
Disclosure of Invention
In view of the above state of the art, the present invention proposes an electronic bionic skin system that is able to "feel" the external pressure stimulus and convert it into a frequency variation of the pulsed electrical signal, which can further approximate the function of real skin.
The technical scheme adopted by the invention is as follows: an electronic bionic skin system comprises a pressure sensing part and a signal coding part;
the pressure sensing part comprises a supporting shell, and an inductance coil and a magnetic field unit which are positioned in the supporting shell, wherein the magnetic field unit can generate a magnetic field;
the support shell comprises a support surface, and the support surface is connected with the magnetic field unit;
when the induction coil is in a working state, external stress acts on the supporting surface, the supporting surface deforms, the magnetic flux of the magnetic field unit acting on the induction coil is caused to change, and the inductance of the coil is changed; the inductance signal is used as an output signal of the pressure sensing part;
the signal coding part comprises an LC oscillating circuit, an edge detection circuit, a frequency division circuit and a differential circuit;
the inductance signal output by the pressure sensing part and the capacitance form an LC oscillating circuit, and the inductance change output by the pressure sensing part is converted into the frequency change of a sine voltage signal through the LC oscillating circuit under the action of external stress; then the output sinusoidal signal is converted into a square wave signal through the edge detection circuit, the frequency division circuit and the differential circuit, the high-frequency signal is converted into a low-frequency signal through the frequency division circuit, the low-frequency square wave signal is obtained, and the low-frequency signal is converted into a low-frequency pulse signal through the differential circuit.
The LC oscillating circuit mainly comprises an inductor, a capacitor and a resistor.
The edge detection circuit mainly comprises a capacitor, a resistor and an inverter chip.
The frequency dividing circuit mainly comprises a frequency divider.
The differential circuit is mainly composed of a capacitor and a resistor.
Preferably, a buffer circuit is provided between the LC oscillating circuit and the edge detection circuit. Preferably, the buffer circuit is mainly composed of a voltage buffer.
In order to improve the sensitivity of detecting the external pressure, weak stress can be detected by the pressure sensing part in the present invention, and the supporting surface is preferably made of a flexible material, which is not limited, and includes Polydimethylsiloxane (PDMS), rubber, etc. Further preferably, the flexible supporting surface is connected with a flexible protrusion, and when the flexible supporting surface is in a working state, external weak stress acts on the flexible protrusion, and the flexible protrusion generates compressive stress to drive the flexible supporting surface to deform. The flexible protrusion material is not limited and comprises PDMS, rubber and the like.
More preferably, the magnetic field unit is made of flexible material, and as a preferred implementation manner, the magnetic field unit is made of flexible material and magnetostrictive material; can be prepared by adopting a physical mixing or physical coating method; wherein the flexible material includes but is not limited to PDMS, styrene-butadiene-styrene block copolymer (SBS) or Eco-flex, etc.; the magnetostriction materials are not limited, and include hard magnetic materials such as neodymium iron boron and the like, and soft magnetic materials such as iron silicon boron and the like; preferably, the material is prepared by mixing PDMS with neodymium iron boron magnetic powder.
The inductance coil can adopt a plane inductance, the magnetic core adopts magnetic metal, magnetic alloy and amorphous magnetic material film, and also can adopt an inductance coil wound by copper wires, and the magnetic core adopts magnetic metal, magnetic alloy and amorphous magnetic material; preferably, the magnetic core is made of amorphous magnetostriction material; further preferably, the amorphous magnetostrictive material is an iron-based amorphous soft magnetic material or a cobalt-based amorphous soft magnetic material.
The shape of the support shell is not limited, and the support shell can be a hollow cylinder (or drum), the cross-sectional shape of which is not limited, including a circle, a rectangle, a polygon and the like, or a hollow cone, the cross-sectional shape of which is not limited, including a circle, a rectangle, a polygon and the like.
In summary, the present invention designs an electronic bionic skin system to include a pressure sensing portion and a signal encoding portion. The pressure sensing part adopts an inductive pressure sensor and is used for sensing the external pressure; the signal encoding section mainly includes an LC oscillating circuit, a buffer circuit, an edge detection circuit, a frequency dividing circuit, and a differentiating circuit. When the magnetic field unit is in a working state, external stress acts on the supporting surface, the supporting surface deforms, the magnetic flux of the magnetic field unit acting on the induction coil changes, the inductance of the coil changes, and the magnetic field unit is output as an output signal; then, the output signal and the capacitor form an LC oscillating circuit, the inductance change of the output is converted into the frequency change of a sine voltage signal through the LC oscillating circuit, the sine signal of the output is converted into a square wave signal through an edge detection signal, the square wave signal is converted into a low-frequency signal through a frequency dividing circuit, and the low-frequency signal can be converted into a low-frequency pulse signal through a differentiating circuit. Therefore, the electronic bionic skin system is further close to the function of human skin, can be compatible with the human skin, and achieves the function of direct communication with the human skin.
Drawings
FIG. 1 is a schematic diagram of the structure of the pressure sensing part of the electronic skin system according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of a mold structure for preparing the upper portion of the support housing of FIG. 1;
FIG. 3 is a schematic diagram of a mold structure for preparing the support housing base of FIG. 1;
fig. 4 is a circuit diagram of a signal encoding part of the electronic bionic skin system in embodiment 1 of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings. It should be noted that the examples described below are intended to facilitate the understanding of the present invention and are not intended to limit the present invention in any way.
Example 1:
the invention is further elucidated below in connection with the drawings and the examples. It is to be understood that these examples are for illustration of the invention only and are not intended to limit the scope of the invention.
The reference numerals in fig. 1 to 3 are: an inductance coil 1, a support housing 2, a magnetic field unit 3, a position 6, a position 7, a housing upper part 8 of the integrated magnetic field unit, an LC oscillating circuit 9, a buffer circuit 10, an edge detection circuit 11, a frequency dividing circuit 12, and a differentiating circuit 13.
In this embodiment, the electronic bionic skin system includes a pressure sensing portion and a signal encoding portion.
As shown in fig. 1, the pressure sensing part includes a support housing 2, and an inductance coil 1 and a magnetic field unit 3, which are located in the support housing, and which are capable of generating a magnetic field. The support housing 2 comprises a support surface under which the magnetic field unit 3 is connected. The support surface is a flexible support surface.
The inductance coil 1 includes a core and an air core coil, and the core passes through the inside of the air core coil. The magnetic core is made of cobalt-based amorphous soft magnetic material. The coil is made by winding copper wire 250 turns.
The magnetic field unit 3 is a flexible magnet, and the flexible magnet material is composed of PDMS and magnetic powder distributed in the PDMS.
The preparation method of the pressure sensing part comprises the following steps:
(1) Preparation of magnetic field unit 3
PDMS is in a liquid state, and the mass ratio of the PDMS main agent to the curing agent is 10:1, mixing to form PDMS mixed solution, wherein the mass ratio of the PDMS mixed solution to the magnetic powder is (2): 1, uniformly mixing, throwing the mixed solution on a glass sheet on a whirling coater at a rotating speed of 600 revolutions per minute, drying at 120 ℃ for 1 hour, taking out, and magnetizing in a 2 Tesla magnetic field to obtain a magnetic field unit 3;
(2) Preparation of support housing
The support shell consists of a shell base and a shell upper part, wherein the shell upper part comprises the rest parts of the shell except the shell base, namely a flexible support surface and a shell side wall;
(2-1) preparation of the housing Upper part
Preparing the upper part of the shell by adopting a mould, wherein the mould structure schematic diagram of the upper part of the shell is shown in figure 2 and consists of an upper mould and a lower mould; the PDMS main agent and the curing agent are mixed according to the mass ratio of 10:1 are evenly mixed and then poured into a lower die, then the magnetic field unit 3 prepared in the step (1) is placed at the central position of the bottom of the lower die, as shown in the position 6 in fig. 2, the upper die is buckled, and the upper part 8 of the shell of the integrated magnetic field unit 3 is obtained after drying for 3 hours at 120 ℃.
(2-2) preparation of housing base
Preparing the shell base by adopting a mould, wherein the mould structure of the shell base is shown in figure 3; the PDMS main agent and the curing agent are mixed according to the mass ratio of 10:1, uniformly mixing and pouring the mixture into a shell base mold, placing an inductance coil at the bottom center position of the shell base mold, as shown in a position 7 shown in fig. 3, fastening the upper part 8 of the shell of the integrated magnetic field unit prepared in the step (2-1), and drying at 70 ℃ for 3 hours to obtain the support shell of the integrated magnetic field unit and the inductance coil.
When the pressure sensing part is in a working state, external stress acts on the flexible supporting surface of the pressure sensing part, the flexible supporting surface deforms, the magnetic flux of the magnetic field unit 3 acting on the induction coil 1 changes, the inductance of the coil changes accordingly, and the inductance signal is used as an output signal of the pressure sensing part.
As shown in fig. 4, the signal encoding section includes an LC oscillating circuit 9, a buffer circuit 10, an edge detection circuit 11, a frequency dividing circuit 12, and a differentiating circuit 13. The LC oscillation circuit is formed by the inductance signal output by the pressure sensing part and a 100nF capacitor, the LC oscillation circuit is connected with a buffer circuit formed by a TLC084 voltage buffer chip, the buffer circuit is connected with an edge detection circuit formed by a 100nF capacitor, a 10KΩ resistor and a model 74LC04 inverter chip, the edge detection circuit is connected with a 8000 times frequency division circuit formed by a 74HC390 chip, and the frequency division circuit is connected with a differential circuit formed by a 10nF capacitor and a 2KΩ resistor.
The inductance change output by the pressure sensing part is caused under the action of external stress, and the inductance change is converted into the frequency change of a sine voltage signal through an LC oscillating circuit; then the output sinusoidal signal is converted into a square wave signal through the edge detection circuit, the frequency division circuit and the differential circuit, the high-frequency signal is converted into a low-frequency signal about 20Hz through the frequency division circuit, the low-frequency square wave signal is obtained, and the low-frequency signal is converted into a low-frequency pulse signal about 20Hz through the differential circuit.
The foregoing embodiments have described the technical solutions and advantageous effects of the present invention in detail, and it should be understood that the foregoing embodiments are merely illustrative of the present invention and are not intended to limit the invention, and any modifications and improvements made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. An electronic bionic skin system, characterized by: comprises a pressure sensing part and a signal coding part;
the pressure sensing part comprises a supporting shell, an inductance coil and a magnetic field unit, wherein the inductance coil is positioned in the supporting shell, and the magnetic field unit can generate a magnetic field;
the support shell comprises a support surface, and the support surface is connected with the magnetic field unit;
when the pressure sensor is in a working state, external stress acts on the supporting surface, the supporting surface deforms, the magnetic flux of the magnetic field unit acting on the inductance coil changes, the inductance of the coil changes, and an inductance signal is used as an output signal of the pressure sensing part;
the signal coding part comprises an LC oscillating circuit, an edge detection circuit, a frequency division circuit and a differential circuit;
an inductance signal and a capacitance output by the pressure sensing part form an LC oscillating circuit, the inductance change output by the pressure sensing part is caused under the action of external stress, and the inductance change is converted into the frequency change of a sine voltage signal through the LC oscillating circuit; then the output sinusoidal signal is converted into a square wave signal through the edge detection circuit, the frequency division circuit and the differential circuit, the high-frequency signal is converted into a low-frequency signal through the frequency division circuit, the low-frequency square wave signal is obtained, and the low-frequency square wave signal is converted into a low-frequency pulse signal through the differential circuit;
a buffer circuit is arranged between the LC oscillating circuit and the edge detection circuit, and the buffer circuit mainly comprises a voltage buffer.
2. The electronic biomimetic skin system of claim 1, wherein: the edge detection circuit mainly comprises a capacitor, a resistor and an inverter chip.
3. The electronic biomimetic skin system of claim 1, wherein: the frequency dividing circuit mainly comprises a frequency divider.
4. The electronic biomimetic skin system of claim 1, wherein: the differential circuit is mainly composed of a capacitor and a resistor.
5. The electronic biomimetic skin system according to any one of claims 1 to 4, wherein: the support surface is made of flexible materials.
6. The electronic biomimetic skin system of claim 5, wherein: the flexible supporting surface is connected with the flexible protrusion, and when the flexible supporting surface is in a working state, external weak stress acts on the flexible protrusion, and the flexible protrusion generates compressive stress to drive the flexible supporting surface to deform.
7. The electronic biomimetic skin system of claim 6, wherein: the magnetic field unit is made of flexible materials.
8. The electronic biomimetic skin system of claim 7, wherein: the magnetic field unit is made of flexible materials and magnetostrictive materials.
9. The electronic biomimetic skin system according to any one of claims 1 to 4, wherein: the inductance coil adopts a plane inductance coil, and the magnetic core adopts magnetic metal, magnetic alloy and amorphous magnetic material film; or an inductance coil wound by copper wires is adopted, and the magnetic core is made of magnetic metal, magnetic alloy or amorphous magnetic material.
10. The electronic biomimetic skin system of claim 9, wherein: the magnetic core is made of amorphous magnetostriction materials.
11. The electronic biomimetic skin system of claim 10, wherein: the amorphous magnetostriction material is an iron-based amorphous soft magnetic material or a cobalt-based amorphous soft magnetic material.
12. The electronic biomimetic skin system according to any one of claims 1 to 4, wherein: the support shell is a hollow cylinder or a hollow cone.
13. The electronic biomimetic skin system of claim 12, wherein: the cross-sectional shape of the support housing may include a circle, a rectangle, or a polygon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610970007.5A CN107997853B (en) | 2016-10-28 | 2016-10-28 | Electronic bionic skin system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610970007.5A CN107997853B (en) | 2016-10-28 | 2016-10-28 | Electronic bionic skin system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107997853A CN107997853A (en) | 2018-05-08 |
| CN107997853B true CN107997853B (en) | 2023-07-14 |
Family
ID=62048614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610970007.5A Active CN107997853B (en) | 2016-10-28 | 2016-10-28 | Electronic bionic skin system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107997853B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683024B (en) * | 2018-12-29 | 2024-02-27 | 中国人民解放军陆军工程大学 | Neuron bionic circuit and capacitance detection system |
| CN110388869B (en) * | 2019-08-23 | 2021-01-05 | 任干支 | Sensor, coil array, positioning method and touch collector for bionic skin |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201316270Y (en) * | 2008-12-18 | 2009-09-30 | 四川川大智胜软件股份有限公司 | Fatigue testing sensor and device based on facial skin expansion |
| CN104697678A (en) * | 2015-03-09 | 2015-06-10 | 中国科学院宁波材料技术与工程研究所 | Sensor for detecting weak stress and preparation method of sensor |
| CN204514512U (en) * | 2015-04-28 | 2015-07-29 | 华北电力大学（保定） | Based on the pressure unit of LC oscillatory circuit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2385474Y (en) * | 1999-07-30 | 2000-06-28 | 杜兵 | Pulse current generator |
| US10369362B2 (en) * | 2004-06-28 | 2019-08-06 | The Alfred E. Mann Foundation For Scientific Research | Neural prosthetic with touch-like sensing |
| US7868628B2 (en) * | 2007-08-16 | 2011-01-11 | Tdk Corporation | Tactile sensor utilizing microcoils with spiral shape |
| CN202793425U (en) * | 2012-08-28 | 2013-03-13 | 上海信耀电子有限公司 | Signal sampling circuit of inductive sensor |
| US9848775B2 (en) * | 2013-05-22 | 2017-12-26 | The Board Of Trustees Of The Leland Stanford Junior University | Passive and wireless pressure sensor |
| CN206499551U (en) * | 2016-10-28 | 2017-09-19 | 中国科学院宁波材料技术与工程研究所 | A kind of electronic bio integumentary system |
-
2016
- 2016-10-28 CN CN201610970007.5A patent/CN107997853B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201316270Y (en) * | 2008-12-18 | 2009-09-30 | 四川川大智胜软件股份有限公司 | Fatigue testing sensor and device based on facial skin expansion |
| CN104697678A (en) * | 2015-03-09 | 2015-06-10 | 中国科学院宁波材料技术与工程研究所 | Sensor for detecting weak stress and preparation method of sensor |
| CN204514512U (en) * | 2015-04-28 | 2015-07-29 | 华北电力大学（保定） | Based on the pressure unit of LC oscillatory circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107997853A (en) | 2018-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106601338B (en) | A kind of flexible electrode and preparation method thereof with functionalization | |
| CN107997853B (en) | Electronic bionic skin system | |
| Han et al. | Design and fabrication of integrated magnetic MEMS energy harvester for low frequency applications | |
| CN105324652B (en) | Pressure sensitive implantation material | |
| CN101924451B (en) | High-performance micro electromagnetic vibration energy harvester easy for integrated manufacturing | |
| AU2019250096B2 (en) | Direct stimulation device with improved drive | |
| JP2010525901A5 (en) | ||
| CN104697678A (en) | Sensor for detecting weak stress and preparation method of sensor | |
| CN104333826B (en) | A kind of novel Bluetooth earphone device and preparation method thereof | |
| EP2765491A3 (en) | A touch pen, electronic device for recognizing the touch pen, and method of operating the electronic device | |
| CN208174513U (en) | A kind of novel vibrating energy collecting device | |
| CN106983507A (en) | A kind of flexible microelectrode arrays measured for body electrical signals and preparation method | |
| WO2011057280A3 (en) | Magneto-electric sensor with injected up-conversion or down-conversion | |
| CN108209900A (en) | Intracranial pressure sensor, detection device and preparation method | |
| GB1419660A (en) | Electrical medical devices | |
| CN107811616A (en) | A kind of flexible many reference amounts human body physical sign detector and its application method | |
| CN110274713A (en) | A kind of fiber base form adaptive passive electronic skin and preparation method thereof | |
| CN103515045A (en) | Flexible pressure-sensitive eddy current coil and production method thereof | |
| Gleason et al. | The effect of magnetic resonance imagers on implanted neurostimulators | |
| Jeong et al. | Design and analysis of wireless power transfer system using flexible coil and shielding material on smartwatch strap | |
| GB2476757A (en) | Magnetic stimulation coils with electrically conducting structures | |
| CN206499551U (en) | A kind of electronic bio integumentary system | |
| CN106182975A (en) | A kind of artificial cochlea electrode based on liquid metal and preparation method thereof | |
| DE60200654D1 (en) | ELEMENT FOR ELECTROMAGNETIC SHIELDING AND METHOD FOR THE PRODUCTION THEREOF | |
| CN102723839A (en) | Electromagnetic energy harvester with flexible substrate and method for preparing electromagnetic energy harvester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210811 Address after: No. 189 Guangming Road, Zhuangshi street, Zhenhai District, Ningbo City, Zhejiang Province Applicant after: Ningbo Renhe Technology Co.,Ltd. Address before: 315201, No. 519, Zhuang Avenue, Zhenhai District, Zhejiang, Ningbo Applicant before: NINGBO INSTITUTE OF MATERIALS TECHNOLOGY & ENGINEERING, CHINESE ACADEMY OF SCIENCES |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |