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Carbon nanotube film three-electrode gas temperature sensor and temperature measuring method thereof

A technology of carbon nanotube film and gas temperature, applied in thermometers, thermometers with directly heat-sensitive electric/magnetic elements, measuring devices, etc., can solve the problem of no temperature sensor, high working voltage, up to 360 volts, and temperature of At 60 degrees Celsius, the breakdown voltage is also above 150 volts, etc., to achieve accurate measurement and wide temperature measurement range

Inactive Publication Date: 2012-11-28
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The breakdown voltage of the two-electrode sensor is as high as 360 volts when the temperature is 10 degrees Celsius, and the breakdown voltage is also above 150 volts when the temperature is 60 degrees Celsius. The working voltage is high, and there is no carbon nanotube film two-electrode gas temperature sensor

Method used

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  • Carbon nanotube film three-electrode gas temperature sensor and temperature measuring method thereof
  • Carbon nanotube film three-electrode gas temperature sensor and temperature measuring method thereof
  • Carbon nanotube film three-electrode gas temperature sensor and temperature measuring method thereof

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Embodiment 1

[0035] Such as figure 2 , image 3 As shown, the carbon nanotube thin film three-electrode gas temperature sensor consists of three electrodes stacked one after the other from top to bottom. The three stacked electrodes are respectively provided with a first electrode 1, a second electrode 2 and a third electrode. Electrode 3, the first electrode 1 of which is composed of a substrate 5 with a carbon nanotube film distributed on the inner surface and an electrode 4 with air holes; the second electrode 2 is composed of a lead-out plate with a lead-out hole in the center; The third electrode 3 is composed of a collector with a blind hole on the electrode plate surface; the three electrodes are separated from each other by insulating pillars 7 .

[0036] figure 2 In the shown embodiment of the carbon nanotube thin film three-electrode gas temperature sensor, there are two vent holes on the electrode surface of the first electrode 1, and the vent holes are circular; carbon nano...

Embodiment 2

[0044] The basic structure of the sensor of this embodiment is the same as that of Embodiment 1, the difference is:

[0045] Among the three electrodes of the carbon nanotube film three-electrode gas temperature sensor, the electrode spacing between two adjacent electrodes is fixed at 170 μm, the first electrode 1 has two vent holes, the second electrode 2 has one lead-out hole, and the third There is one blind hole for the electrode 3 .

[0046] Using the carbon nanotube film three-electrode gas temperature sensor with fixed electrode spacing, the single-value temperature characteristics in nitrogen were obtained experimentally ( Figure 5 Shown), the temperature measurement model established by the fusion of the ion current input data output by the sensor, and the temperature measurement value in nitrogen with an accuracy of less than 1% is obtained.

[0047] Figure 5 In the embodiment shown in which the carbon nanotube film three-electrode gas temperature sensor measures...

Embodiment 3

[0049] The basic structure of this embodiment is the same as that of Embodiment 1, the difference is that the electrode spacing between two adjacent electrodes in the three electrodes of the carbon nanotube film three-electrode gas temperature sensor is 250 μm and 30 μm respectively, and the first electrode 1 and the second electrode The area of ​​two electrodes and two plates facing each other is 0.01mm 2 , the area of ​​the plate facing the second electrode 2 and the third electrode 3 is 0.01mm 2 .

[0050] There is one vent hole on the electrode surface of the first electrode 1, and the vent hole is quadrilateral, pentagonal or hexagonal; the second electrode 2 has 4 center lead-out holes, and the lead-out holes are quadrilateral, pentagonal or hexagonal ; The number of blind holes in the third electrode 3 is 4, and the blind holes are 3-6 prisms or pyramids.

[0051] The temperature measuring method of the present embodiment is basically the same as embodiment 1, the dif...

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Abstract

The invention discloses a carbon nanotube film three-electrode gas temperature sensor and a temperature measuring method thereof. The sensor comprises a first electrode, a second electrode and a third electrode which are distributed in turn; the first electrode is provided with an air hole and a base the inner surface of which is adhered with a carbon nanotube film; the centre of the second electrode is provided with a lead-out hole; the plate face of the third electrode is provided with a blind hole; the three electrodes are mutually isolated. The method comprises the steps of: 1) placing a gas temperature sensor; 2) applying voltage on the electrodes; 3) measuring the output ion flow value of the sensor; 4) forming a sample with the measured value and a gas temperature calibration value, and establishing a gas temperature measuring database by using the sample and an interpolation sample; 5) constructing a data fusion instrument, and building a gas temperature measurement model; 6) inputting the actual measured value of the sensor into the measurement model to obtain an accurate gas temperature measurement value. The gas temperature sensor works at low voltage, has high sensitivity, good linearity and high accuracy for measuring gas temperature and can be used for measuring the temperatures of combustible, explosive and toxic gas.

Description

technical field [0001] The invention relates to the field of gas temperature detection, in particular to a three-electrode gas temperature sensor based on carbon nanotube film and gas discharge principle and a temperature measurement method thereof. Background technique [0002] With the urgent need of gas detection in all walks of life and the development of nanotechnology, nanosensors have made great progress. Especially with the discovery of carbon nanotubes at the end of the 20th century, carbon nanotubes have shown attractive application prospects in the fields of gas, temperature and humidity detection. The carbon nanotube thin film two-electrode sensor in the carbon nanotube temperature sensor has become a research hotspot in the field of gas temperature detection due to its advantages of high detection sensitivity, wide gas detection range, and fast response. The carbon nanotube film two-electrode gas temperature sensor is based on the principle of gas discharge, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/40
Inventor 张勇方静王进张晶园宋晓慧姜为华王影花张建业牛国平王晓冰李昕唐建文刘君华
Owner XI AN JIAOTONG UNIV
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