Unlock instant, AI-driven research and patent intelligence for your innovation.

Flexible temperature-sensitive pressure sensor based on nanoparticle lattice quantum conductance and its assembly method and application

A pressure sensor and nanoparticle technology, applied in the direction of nanotechnology thermometers, applications of thermometers, nanotechnology for sensing, etc., can solve the problems of insufficient sensitivity and limited resolution, and achieve simplified sensing structure and functional The effect of low consumption

Active Publication Date: 2020-10-09
NANJING UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These three pressure sensors with different working modes have their own shortcomings: Among them, the electrical signal generated by the piezoelectric sensor only comes from the moment of pressure generation, and will not maintain its signal amplitude as the pressure is maintained. Therefore, the piezoelectric pressure sensor is greatly limited in practical applications; and the piezo-capacitive pressure sensor is much more complicated than the other two sensors because the electrical parameter it measures is capacitance. However, although the measurement external circuit of the piezoresistive pressure sensor is relatively simpler, its measurement resolution is limited, and the shortcomings such as insufficient sensitivity cannot be ignored.
However, it has not been researched and developed by simultaneously preparing a dense lattice of nanoparticles on the upper and lower surfaces of a flexible substrate and realizing the parallel measurement of pressure and temperature.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flexible temperature-sensitive pressure sensor based on nanoparticle lattice quantum conductance and its assembly method and application
  • Flexible temperature-sensitive pressure sensor based on nanoparticle lattice quantum conductance and its assembly method and application
  • Flexible temperature-sensitive pressure sensor based on nanoparticle lattice quantum conductance and its assembly method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The different effects of pressure on the conductance change trend of each group of sensor lattices are deduced from the following physical principles.

[0032] Suppose the flexible film has a thickness t and a length l 0 The initial average gap of the nanoparticles in the lattice corresponding to the upper and lower surfaces of the film is d 0 , as attached figure 2 As shown in (1), when a pressure acts on the upper surface of the membrane, the flexible membrane undergoes a deformation of curvature R, from the attached figure 2 The state in (1) changes to the state in (2). At this time, the average gap between the nanoparticles on the upper surface is d 1 , the average gap between the nanoparticles on the lower surface is d 2 . In general, during the straining process, the median line of the film does not change, so the length l of the upper and lower surfaces 1 and l 2 becomes:

[0033]

[0034]

[0035] Therefore, the strains on the upper and lower sur...

Embodiment 2

[0045] The preparation of the flexible temperature-sensitive pressure sensor based on nanoparticle lattice quantum conductance according to the present invention comprises the following steps:

[0046] Step 1. Choose a clean, smooth and scratch-free polymer insulating film. The film used is polyethylene terephthalate, and the thickness of the selected film is 0.1mm;

[0047] Step 2, printing pattern-overlapping metal conductive microelectrodes on the corresponding positions on the upper and lower surfaces of the polymer film. The microelectrode here is an interdigitated silver electrode deposited by mask evaporation in vacuum, the thickness of the metal layer is 100nm, and the gap width between the positive and negative electrodes of the electrode is 100μm;

[0048] Step 3, depositing a metal nanoparticle lattice with the same coverage between each interdigitated electrode. The metal nanoparticles are prepared by the magnetron plasma gas aggregation method, and the nanoparti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
electrical resistivityaaaaaaaaaa
elastic modulusaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a flexible temperature-sensitive pressure sensor based on nanoparticle lattice quantum conductance and its assembly method and application. The sensor includes a high molecular polymer film, a metal nanoparticle lattice, a metal microelectrode and a conductance measurement external circuit; wherein , at least one group of metal nanoparticle lattices is deposited on the upper and lower surfaces of the polymer film, and the positions of the metal nanoparticle lattices on the upper and lower surfaces of each group correspond one-to-one; the metal microelectrode is arranged on each group of metal nanoparticle lattices The two sides are symmetrically distributed on the upper and lower surfaces of the high molecular polymer film; the conductance measurement external circuit is electrically connected with the metal microelectrode. The conductance response signal of the nanoparticle lattice of the present invention has an exponential relationship with the distance between particles, so it has an extremely sensitive response to deformation caused by pressure; it avoids an additional integrated temperature sensor and simplifies the sensing structure; the impedance of the nanoparticle lattice is all In the order of megohms, the power consumption is extremely small; it can be produced and packaged in a large area.

Description

technical field [0001] The invention belongs to the field of sensors and detection instruments, and relates to a wearable flexible sensor capable of measuring external pressure and ambient temperature at the same time. By comparing the magnitude of the conductance change of the nanoparticle lattice on the upper and lower surfaces of the flexible film, the value of the external pressure and temperature can be extracted. Minor changes, specifically a flexible temperature-sensitive pressure sensor based on nanoparticle lattice quantum conductance and its assembly method and application. Background technique [0002] Electronic skin is the latest wearable sensing device, which has extremely high application value in the fields of human behavior detection, life and health monitoring, artificial intelligence, and robotics. As a substitute for human skin, electronic skin also requires sensory capabilities such as touch, temperature, and pain under the premise of physical properties...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/024B82Y15/00B82Y40/00G01K7/00G01L1/00
CPCG01K7/16G01K13/00G01K15/005G01L25/00G01K2211/00G01L1/20G01L5/0076G01L1/2287G01L5/00
Inventor 陈敏瑞韩民刘畅罗维峰金琛
Owner NANJING UNIV