公开(公告)号：US11215515B2

公开(公告)日：2022-01-04

申请号：US17006782

申请日：2020-08-28

Applicant: University of Electronic Science and Technology of China

Inventor： Yadong Jiang ,  Huiling Tai ,  Dongsheng Wang ,  Zhen Yuan ,  Mingjun Zhou ,  Jing Yang

IPC: B32B27/08 ,  G01L1/22 ,  C09D133/02 ,  C08J7/04

Abstract: A preparation method of a three-layer self-healing flexible strain sensor includes steps of: preparing an encapsulating layer composite, so as to obtain a concentrated solution; preparing a strain sensitive layer composite, so as to obtain a thick liquid; dropping the thick liquid on a glass substrate, and statically curing at a room temperature; dropping the concentrated solution on a cured film obtained in the S3, and statically curing at the room temperature; striping a cured filmed obtained in the S4 from the glass substrate, and drawing out two wires as electrodes; and dropping the concentrated solution on the other surface of the cured film obtained in the S3 with a same amount of S4, and statically curing at the room temperature for obtaining the three-layer self-healing flexible strain sensor. The three-layer self-healing structure strain sensor can be prepared without using a repair agent, but can achieve rapid self-repair.

公开(公告)号：US10730226B2

公开(公告)日：2020-08-04

申请号：US15893678

申请日：2018-02-11

Applicant: University of Electronic Science and Technology of China

Inventor： Weizhi Li ,  Jimeng Li ,  Yuming Wu ,  Xiaosong Du ,  Huiling Tai ,  He Yu

IPC: B29C55/04 ,  C08J5/18 ,  B29C41/00 ,  B29C41/02 ,  B29C41/46 ,  B29C55/00 ,  B29L7/00 ,  B29K27/00 ,  B29K105/00

Abstract: A method for preparing a pyroelectric polymer film based on a combined process of solution casting and uniaxial stretching is disclosed. The pyroelectric polymer film is firstly prepared by solution casting, afterwards, the casted film is subjected to uniaxial stretching when the film is in a semi-cured state (wet film). Thus a larger stretching ratio (>10) at a lower temperature (even at room temperature) is realized. Without undergoing a further poling process, the as-stretched film does have a fairly, good pyroelectric performance. Moreover, the surface of the stretched film is smoother and has fewer surface defects.

公开(公告)号：US20180340848A1

公开(公告)日：2018-11-29

申请号：US16036612

申请日：2018-07-16

Applicant: University of Electronic Science and Technology of China

Inventor： Huiling Tai ,  Yujin Yao ,  Dongsheng Wang ,  Zhen Yuan ,  Yadong Jiang ,  Guangzhong Xie ,  Xiaosong Du

IPC: G01L1/22 ,  C09D133/02 ,  C08J7/04

Abstract: A three-layer self-healing flexible strain sensor includes: a self-healing sensitive layer, wherein a self-healing encapsulating layer is respectively placed on an upper surface and a lower surface of the self-healing sensitive layer. The self-healing sensitive layer comprises a doped carbon material or a conductive composite. The three self-healing layers of the self-healing strain sensor can quickly repair the internal and external damage caused by the layered structure in a short period of time after the external damage, and does not require external stimulation. The three-layer self-healing structure strain sensor is simple in preparation without using a repair agent, which can achieve rapid self-repair at the room temperature, and can be repeatedly repair. The three-layer self-healing structure increases the strength and modulus of the strain sensor as well as increases the ability of the strain sensor to resist external damage.

公开(公告)号：US20240102979A1

公开(公告)日：2024-03-28

申请号：US18533743

申请日：2023-12-08

Applicant: University of Electronic Science and Technology of China

Inventor： Huiling Tai ,  Yadong Jiang ,  Yilun Ma ,  Zaihua Duan ,  Yuanming Wu ,  Zhen Yuan

IPC: G01N33/00

CPC classification number: G01N33/0006

Abstract: A calibration concentration selection method includes steps of: using a gas sensor array to obtain a concentration variation sequence and a response variation sequence of the gas mixture; constructing and training an AE-BP model; constructing VAE and identically distributing the response variation sequence; inputting the identically distributed response variation sequence into the trained AE-BP model to output a predicted concentration variation sequence; and then normalizing the predicted concentration variation sequence to generate a target concentration variation sequence; sorting a target concentration variation sequence and calculating a response gradient sequence; processing the response gradient sequence for obtaining a corresponding smoothed gradient sequence; if the spike is greater than a preset hyperparameter, finding a large gradient concentration interval; and selecting concentration test points by random uniform sampling according to weights; and selecting concentration test points from all other concentration intervals in the smoothed gradient sequence by random uniform sampling.

公开(公告)号：US11730392B2

公开(公告)日：2023-08-22

申请号：US16538826

申请日：2019-08-13

Applicant: University of Electronic Science and Technology of China

Inventor： Yadong Jiang ,  Huiling Tai ,  Bohao Liu ,  Si Wang ,  Zhen Yuan ,  Qi Huang ,  Guangzhong Xie

IPC: A61B5/08 ,  A61B5/09 ,  G01N27/00 ,  A61B5/083 ,  A61B5/087 ,  A61M16/00 ,  A61B5/093 ,  A61B5/113 ,  A61B5/00

CPC classification number: A61B5/083 ,  A61B5/087 ,  A61B5/0816 ,  A61B5/093 ,  A61B5/113 ,  A61B5/4836 ,  A61M16/024 ,  A61M2016/0021

Abstract: A breathing-driven flexible respiratory sensor includes: a test cavity and a digital electrometer, wherein an upper internal wall of the test cavity is provided with an upper detecting component, and a lower internal wall of the test cavity is provided with a lower detecting component; the upper detecting component and the lower detecting component is arranged in a longitudinal symmetry form; wherein the upper detecting component comprises a substrate, an electrode and a gas sensitive film bonded in sequence from top to bottom, and the substrate is bonded to the upper internal wall of the test cavity; wherein a rubber airbag is disposed in the test cavity, and a friction film is bonded to the rubber airbag; an air inlet cylinder is connected to a left end of the rubber airbag, and an air outlet cylinder is connected to a right end of the rubber airbag.

公开(公告)号：US11235496B2

公开(公告)日：2022-02-01

申请号：US16188304

申请日：2018-11-13

Applicant: University of Electronic Science and Technology of China

Inventor： Weizhi Li ,  Yuming Wu ,  Xiaosong Du ,  Jimeng Li ,  Huiling Tai ,  Guangzhong Xie

IPC: B29C41/00 ,  B29C41/46 ,  B29C41/52 ,  B29L7/00 ,  B29K27/00

Abstract: A one-step solution casting method for preparing a PVDF-based pyroelectric polymer film is provided, which belongs to the technical field of functional material preparation. The method comprises steps of: treating a substrate with a hydrophilic reagent to obtain a hydrophilically-modified substrate, and then casting the organic solution of polyvinylidene fluoride (PVDF) or its copolymer on the hydrophilically-modified substrate. After cured, the as-casted PVDF-based film shows pyroelectricity without undergoing any stretching or poling post-treatment, indicates that the dipoles of the one-step prepared film are aligned. The self-polarization of the prepared film is attributed to a hydrogen bond induced layer-by-layer electrostatic self-assembly growth mechanism. The method is simple, low cost, high efficient, high capability to produce thick and large-area film with smooth morphology and ease to be scalized.

公开(公告)号：US10816418B2

公开(公告)日：2020-10-27

申请号：US16036612

申请日：2018-07-16

Applicant: University of Electronic Science and Technology of China

Inventor： Huiling Tai ,  Yujin Yao ,  Dongsheng Wang ,  Zhen Yuan ,  Yadong Jiang ,  Guangzhong Xie ,  Xiaosong Du

IPC: G01L1/22 ,  C09D133/02 ,  C08J7/04

Abstract: A three-layer self-healing flexible strain sensor includes: a self-healing sensitive layer, wherein a self-healing encapsulating layer is respectively placed on an upper surface and a lower surface of the self-healing sensitive layer. The self-healing sensitive layer comprises a doped carbon material or a conductive composite. The three self-healing layers of the self-healing strain sensor can quickly repair the internal and external damage caused by the layered structure in a short period of time after the external damage, and does not require external stimulation. The three-layer self-healing structure strain sensor is simple in preparation without using a repair agent, which can achieve rapid self-repair at the room temperature, and can be repeatedly repair. The three-layer self-healing structure increases the strength and modulus of the strain sensor as well as increases the ability of the strain sensor to resist external damage.