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Temperature sensor and its preparation method

A technology of temperature sensor and carbon nanomaterials, applied in thermometers, instruments, thermometers with directly sensitive electrical/magnetic elements, etc., can solve the problem that the heat transfer balance model cannot accurately describe the measured object, and the temperature measuring element cannot The temperature measurement requirements and data acquisition board requirements are high, so that the processing methods can be automated, the design is flexible, and the material and process costs are low.

Active Publication Date: 2020-07-24
深圳感碳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the heat transfer balance model cannot accurately describe the actual balance of the measured object, the accuracy of the test data is poor, and the requirements for the data acquisition board are high
Moreover, when the temperature of the measured object changes with time, the hysteresis of these temperature measuring elements cannot meet the temperature measurement requirements.

Method used

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  • Temperature sensor and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Commercially available single-walled carbon nanotubes were used as temperature-sensitive materials. An aluminum sheet is used as the heat conduction substrate 1 with a thickness of 0.16 mm.

[0053] First, insulate the aluminum sheet, and modify a layer of polymer layer on the upper surface of the aluminum sheet. The specific method is as follows:

[0054] Spin-coat a polyamic acid solution with a mass fraction of 10% on the surface of the aluminum sheet. The spin-coating program is set to 1000 rpm for 30 s and 3000 rpm for 30 s. Heat the spin-coated aluminum plate at 100 °C for 5 min. , heated at 150°C for 5min to remove part of the solvent and form a polymer layer. Then, the temperature-sensitive carbon nanomaterial layer 2 composed of temperature-sensitive materials is compounded on the surface of the polymer layer, and the temperature-sensitive carbon nanomaterial layer 2 is a continuous structure (square), and the specific method is as follows:

[0055] At 160° C...

Embodiment 2

[0058] Commercially available graphite nanosheets were used as temperature-sensitive materials. The aluminum sheet is used as the heat conduction substrate with a thickness of 0.16mm.

[0059] First, insulate the aluminum sheet, and modify a layer of polymer layer on the upper surface of the aluminum sheet. The specific method is as follows:

[0060] Spin-coat a polyamic acid solution with a mass fraction of 10% on the surface of the aluminum sheet. The spin-coating program is set to 1000 rpm for 30 s and 3000 rpm for 30 s. Heat the spin-coated aluminum plate at 100 °C for 5 min. , heated at 150°C for 5min to remove part of the solvent and form a polymer layer. Then, on the surface of the polymer layer, a temperature-sensitive carbon nanomaterial layer composed of a temperature-sensitive material is compounded. The temperature-sensitive carbon nanomaterial layer is a continuous structure (square), and the specific method is as follows:

[0061] At 160°C, the aqueous solution...

Embodiment 3

[0063] Polyimide is used as a temperature-sensitive material to form a temperature-sensitive carbon nanomaterial layer with a continuous structure. The aluminum sheet is used as the heat conduction substrate. The preparation method of this implementation temperature sensor is as follows:

[0064] First, 1.5 g of precursor solution, which is N,N'-dimethylacetamide solution of polyamic acid, was spin-coated on a 0.16 mm thick aluminum sheet to form a polyamic acid-aluminum sheet composite matrix. Carry out heat treatment on the spin-coated polyamic acid-aluminum sheet composite substrate, specifically remove water at 100°C for 0.5h, then remove solvent at 150°C for 1.5h, and finally heat treat at 300°C to make polyamic acid amide into polyimide to form a polyimide-aluminum sheet composite matrix. Place the polyimide-aluminum sheet composite matrix in a laser cutting machine for laser scanning carbonization, the laser light source used is CO 2 Laser, the laser power is control...

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Abstract

The invention relates to a temperature sensor, comprising a temperature sensor probe and a data acquisition component. The temperature sensor probe includes a temperature-sensing carbon nano materiallayer, a heat-conducting base and a packaging shell, wherein the temperature-sensing carbon nano material layer is arranged on the heat-conducting base and is packaged in the packaging shell; a heat-insulating layer is arranged between the packaging shell and the temperature-sensing carbon nano material layer; at least part of the heat-conducting base is exposed out of the packaging shell; at least two parts of the temperature-sensing carbon nano material layer act as electrodes electrically connected with a circuit acquisition component. The invention also provides a production method of thetemperature sensor, comprising: modifying the surface of the heat-conducting base with the temperature-sensing carbon nano material layer, electrically connecting the at least two parts of the temperature-sensing carbon nano material layer to the circuit acquisition component, packaging the temperature-sensing carbon nano material layer in the packaging shell, filling space between the temperature-sensing carbon nano material layer and the packaging shell via the heat-insulating layer, and exposing at least part of the heat-conducting base outside the packaging shell to form the temperature sensor.

Description

technical field [0001] The invention relates to the technical field of temperature sensors, in particular to a temperature sensor and a preparation method thereof. Background technique [0002] Temperature sensors have important applications in various temperature detection devices such as human body thermometers. Temperature detection is generally divided into two types: non-contact and contact. Non-contact, such as infrared temperature measurement, has fast measurement speed, but its accuracy is poor. Environmental factors (steam, dust, smoke) have a greater impact on accuracy, and the price Expensive and does not allow for continuous temperature measurement. [0003] Contact temperature detection commonly used resistance thermometers, thermocouples, semiconductor thermistors, etc. These contact temperature detection achieves thermal balance through conduction or convection, so that the indication value of the thermometer indicates the temperature of the measured object. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/16
CPCG01K7/16
Inventor 刘涛姚艳波王瑞
Owner 深圳感碳科技有限公司
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