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

Material identification sensor and method for identifying material attributes by using same

A technology of material identification and material properties, applied in the field of sensors, can solve problems such as inability to effectively distinguish

Pending Publication Date: 2022-06-24
HANGZHOU INNOVATION RES INST OF BEIJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sensor can accurately and quickly measure the thermal properties of materials, so as to realize the distinction of materials; however, this kind of detection technology cannot effectively distinguish materials with similar thermal properties

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
  • Material identification sensor and method for identifying material attributes by using same
  • Material identification sensor and method for identifying material attributes by using same
  • Material identification sensor and method for identifying material attributes by using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] like figure 1 and 2 As shown, a material identification sensor in this embodiment, the sensor includes an encapsulation layer 1, a temperature measurement layer and a base layer 4 connected in sequence from top to bottom, and the temperature measurement layer includes a circular heat source 2 and The annular temperature sensor 3, the annular heat source 2 is arranged inside the annular temperature sensor 3, the encapsulation layer 1 is made of polydimethylsiloxane material, and the base layer 2 is Made of polyimide.

[0046]In a further scheme, the annular heat source 2 is laser-induced graphene obtained by irradiating the base layer 4 with laser light, the annular temperature sensor 2 is a thermistor, and the annular temperature sensor 3 passes through the magnetic field. The controlled sputtering is fixed on the base layer 4 . The two ends of the annular heat source 2 are respectively connected with a first electrode 21 and a second electrode 22, the first electrod...

Embodiment 2

[0049] This embodiment is a method for identifying material properties using the material identification sensor prepared in Embodiment 1, and the method is based on the following theory:

[0050] Simulation and physical model building:

[0051] According to the structure, size and material of the sensor described in Example 1, a model was built in Comsol for simulation, the ambient temperature was set to 20°C, and the heat source power was given. A probe is placed at the temperature sensor to simulate the effect of the properties of the placed material (thermal conductivity, density, and specific heat capacity) on the change in the "temperature-time" curve at the probe. The simulation results are as Figure 3-5 shown, from image 3 It can be seen that as the thermal conductivity of the material changes from 0.0381W / (mk) to 38100W / (mk), the "temperature-time" curve at the probe hardly changes, which indicates that the change in thermal conductivity of the material does not af...

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
Radius sizeaaaaaaaaaa
Widthaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a material identification sensor and a method for identifying material attributes by using the material identification sensor, the material identification sensor comprises a packaging layer, a temperature measurement layer and a substrate layer which are sequentially connected from top to bottom, and the temperature measurement layer comprises an annular heat source and an annular temperature sensor. And the annular heat source is arranged in the annular temperature sensor. According to the material identification sensor, materials with similar thermal properties can be effectively distinguished through a specific structure of a center ring heat source and outer ring temperature measurement; according to the method, a to-be-tested material with a fixed volume is placed on a material identification sensor, a heat source generates constant power, the resistance change of a circular temperature sensor is tested, materials with different densities and specific heat capacities can show different resistance-time curves, and meanwhile, the resistance-time curves meet the logarithmic relationship; and fitting is carried out through the resistance-time curve to obtain a characteristic value, and material attribute identification is carried out according to the characteristic value.

Description

technical field [0001] The invention belongs to the technical field of sensors, and particularly relates to a material identification sensor and a method for identifying material properties using the same. Background technique [0002] With the rapid development of the Internet of Things and 5G, there is an increasing demand for devices with sensing technologies such as sound, light, electricity, heat and magnetism in the environment. A lot of research has been done on the sensor, and good progress has been made in the miniaturization and flexibility of the device. However, there are few researches on devices for object material recognition. So far, most of the material identification devices reported in the literature are based on the transient planar heat source method. Temperature sensor, when testing, place the object to be tested on the sensor, apply voltage to the metal thermistor to heat up, and characterize the thermal conductivity by testing the change of resistan...

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
IPC IPC(8): G01N27/04
CPCG01N27/041
Inventor 邓元吴思程张珂杨杰
Owner HANGZHOU INNOVATION RES INST OF BEIJING UNIV OF AERONAUTICS & ASTRONAUTICS
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com