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Multi-channel flexible array type sensor, manufacturing method thereof and method for monitoring stress of curved-surface metal piece

A flexible sensor and flexible array technology, applied in the measurement, instrument, measuring device and other directions of applying the property force of piezoresistive materials, can solve the problems of high failure rate of a single sensor, limited monitoring range, electrostatic interference, etc.

Inactive Publication Date: 2021-09-10
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The field range monitoring of these metal thin-walled structures has always been one of the key research topics, especially the force monitoring and analysis of these structures during the stress process. The sensors currently used have limited monitoring range, electrostatic interference and Problems such as high failure rate of a single sensor

Method used

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  • Multi-channel flexible array type sensor, manufacturing method thereof and method for monitoring stress of curved-surface metal piece
  • Multi-channel flexible array type sensor, manufacturing method thereof and method for monitoring stress of curved-surface metal piece
  • Multi-channel flexible array type sensor, manufacturing method thereof and method for monitoring stress of curved-surface metal piece

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Prepare the required graphene by thermal expansion-ultrasonic combined method, specifically: after thermal expansion of 0.5 g of expandable graphite at a thermal expansion temperature of 700° C., use acetone as a solvent for ultrasonic oscillation for 3 hours, remove acetone, and obtain graphene;

[0050] (2) With normal hexane as solvent, the obtained graphene and basic component PDMS are mixed uniformly by solvent resonance method to obtain mixed reagent A; wherein, graphene accounts for the best 5% mass fraction of mixed reagent A; solvent resonance method In order to adopt an ultrasonic instrument to oscillate, the oscillation frequency is 40kHz, the temperature is controlled at ≤ 40°C, and the ultrasonic time is 30min.

[0051] (3) According to the mass ratio, the basic component PDMS:NaCl=10g:12g, the NaCl and the mixed reagent A were mixed uniformly by mechanical mixing method, and 3g of n-hexane solvent was added to adjust the fluidity to obtain the mixed rea...

Embodiment 2

[0061] (1) The required graphene is prepared by thermal expansion-ultrasonic combined method. The specific preparation method is to thermally expand 0.5 g of expandable graphite at a thermal expansion temperature of 700 ° C. After thermal expansion, use acetone as a solvent and ultrasonically oscillate for 2 hours to remove acetone to obtain Graphene;

[0062] (2) With normal hexane as solvent, the obtained graphene and basic component PDMS are mixed uniformly by solvent resonance method to obtain mixed reagent A; wherein, graphene accounts for the best 5% mass fraction of mixed reagent A; solvent resonance method In order to adopt an ultrasonic instrument to oscillate, the oscillation frequency is 40kHz, the temperature is controlled at ≤40°C, and the ultrasonic time is 40min.

[0063] (3) According to the mass ratio, the basic component PDMS: NaCl = 10g: 12g is mixed uniformly with NaCl and mixed reagent A by mechanical mixing method, and 3.5g of n-hexane solution is added t...

Embodiment 3

[0071] (1) The required graphene is prepared by thermal expansion-ultrasonic combined method; the specific preparation method is to thermally expand 0.5g of expandable graphite at a thermal expansion temperature of 700°C. After thermal expansion, use acetone as a solvent and ultrasonically oscillate for 2 hours to remove acetone to obtain Graphene;

[0072] (2) Using n-hexane as a solvent, the prepared graphene and the basic component PDMS are mixed uniformly by a solvent resonance method to obtain a mixed reagent A; wherein, graphene accounts for a mass fraction of the mixed reagent A of 4%;

[0073] (3) According to the mass ratio, the basic component PDMS:NaCl=2:1 mass ratio, the mixed reagent A and 5gNaCl are mixed uniformly by mechanical mixing, and 3g of n-hexane is added to adjust the dilution. The NaCl used is made by low-temperature planetary ball milling method ; The temperature is -20°C, the mass ratio of the ball to the material is, the grinding ball: NaCl=20:1, th...

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Abstract

The invention discloses a multi-channel flexible array type sensor, a manufacturing method thereof and a method for monitoring stress of a curved-surface metal piece, and belongs to the field of array type sensors and structural health monitoring of the array type sensors. The multi-channel flexible array type sensor comprises a plurality of graphene / PDMS porous flexible sensor units, a PU film and wires; and each graphene / PDMS porous flexible sensor unit is connected with two wires through conductive silver paste in a solidified mode, and the plurality of graphene / PDMS porous flexible sensor units are arranged in a rectangular matrix and fixed through the PU film. The multi-channel flexible array type sensor is attached to the curved-surface metal piece, the multi-channel flexible array type sensor is connected with the data collector, and the stress change of the curved-surface metal piece is monitored according to the change of the resistance curve output by each graphene / PDMS porous flexible sensor unit. The graphene / PDMS porous flexible sensor prepared by the method is uniform in pore structure, controllable in pore diameter and porosity, and obvious and rapid in response.

Description

technical field [0001] The invention relates to the technical field of array sensors and structural health monitoring thereof, in particular to a multi-channel flexible array sensor, a manufacturing method thereof, and a method for monitoring force on curved metal parts. Background technique [0002] Flexible sensors have good flexibility, rapid response, and good biocompatibility. They have huge potential applications in the fields of health monitoring, intelligent robots, wearable electronic devices, and electronic skin. Whether it is combined or used for structural health monitoring of devices has received extensive attention and research. However, at this stage, the health monitoring technology for planar structural parts is very mature, and it is widely used in typical parts of aircraft to achieve good control. With the development of science and technology and the development of flexible materials, the force monitoring of aircraft metal thin-walled cylindrical parts h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/18G01L5/00
CPCG01L1/18G01L5/00
Inventor 孟庆实王彦龙王向明张业伟王朔周志强王英波刘建邦冯媛媛刘代强韩森森
Owner SHENYANG AEROSPACE UNIVERSITY
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