Silver film resistor-type atomic oxygen sensor, atomic oxygen detector and application methods thereof

An application method, atomic oxygen technology, applied in the direction of material resistance, etc., can solve problems such as large measurement error, slow reaction rate, and poor response time

Active Publication Date: 2013-03-27
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a silver film resistive atomic oxygen sensor with fast response rate, short sampling period, good real-time response and high measurement accuracy, so as to solve the problems of large measurement error,

Method used

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  • Silver film resistor-type atomic oxygen sensor, atomic oxygen detector and application methods thereof
  • Silver film resistor-type atomic oxygen sensor, atomic oxygen detector and application methods thereof
  • Silver film resistor-type atomic oxygen sensor, atomic oxygen detector and application methods thereof

Examples

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Embodiment 1

[0049] see figure 1 , the silver film resistive atomic oxygen sensor of the present invention comprises an alumina ceramic substrate 1 on which a silver film resistance wire 2 is arranged, and the lines of the silver film resistance wire 2 are arranged on the alumina ceramic substrate 1 in a zigzag shape Above, the two ends of the silver film resistance wire 2 are provided with metal electrodes 3 respectively.

[0050] The invention adopts the silver film resistance wire 2 to measure the intensity of atomic oxygen erosion, has small volume, light weight and low power consumption, and the silver film resistance has high reaction rate, high detection sensitivity and high measurement precision. In addition, the lines of the silver film resistance wire 2 are arranged in a "zigzag" shape, and the longest possible line can be arranged in a limited space, so that the resistance change of the silver film resistance wire 2 caused by atomic oxygen erosion can be more easily measured, ma...

Embodiment 2

[0054] see image 3 , the atomic oxygen detector of the present invention includes the atomic oxygen sensor of embodiment 1, and also includes a precision voltage reference source, a precision resistor, an instrument amplifier and a single-chip microcomputer. Wherein, the metal electrodes 3 at both ends of the silver film resistance wire 2 on the atomic oxygen sensor are respectively connected to instrument amplifiers for real-time measurement of the resistance value of the silver film resistance wire 2 . The instrument amplifier is used to amplify the voltage signal at both ends of the atomic oxygen sensor into the sampling voltage of the single-chip microcomputer and then transmit it to the single-chip microcomputer; the single-chip microcomputer is used to calculate the resistance value of the atomic oxygen sensor in real time according to the value of the sampling voltage. The precision voltage reference source provides a voltage source for the series-connected precision r...

Embodiment 3

[0059] see Figure 4 , the present invention detects the application method of the atomic oxygen flux of spacecraft orbital space with the atomic oxygen detector of embodiment 2, comprises the following steps:

[0060] S1: Measure and record the initial resistance value R of the atomic oxygen sensor in Example 1 at 0°C 0 .

[0061] S2: Install the atomic oxygen sensor on the windward surface of the spacecraft, measure and calculate the first resistance value R of the atomic oxygen sensor at the first time point of the unit time interval through the single-chip computer 1 and a second resistance value R at a second time point 2 , and measure the first temperature value T at the first time point on the atomic oxygen sensor 1 and the second temperature value T at the second time point 2 .

[0062] In this embodiment, it is preferable to use the following formula to calculate the first resistance value R 1 :

[0063] R 1 = ...

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Abstract

The invention discloses a silver film resistor-type atomic oxygen sensor, an atomic oxygen detector and application methods thereof. The silver film resistor-type atomic oxygen sensor comprises an alumina ceramic substrate, wherein a silver film resistance wire is laid on the alumina ceramic substrate; a line of the silver film resistance wire is laid on the alumina ceramic substrate in a shape like as Chinese character 'zhi'; metal electrodes are respectively arranged at two ends of the silver film resistance wire; the atomic oxygen detector comprises a precision voltage reference source, a precision resistor, the atomic oxygen sensor, an instrument amplifier and a singlechip; the instrument amplifier amplifies voltage signals at two ends of the atomic oxygen sensor and then transmits the voltage signals to the singlechip; and the singlechip is used for calculating a resistance value of the atomic oxygen sensor in real time according to the value of sampling voltage. The flux of atomic oxygen of a space can be deduced and calculated by change of a resistance value of the silver film resistance wire, and the silver film resistor-type atomic oxygen sensor and atomic oxygen detector are good in instantaneity, low in cost and high in measurement accuracy.

Description

technical field [0001] The invention relates to the field of atomic oxygen environment in low earth orbit space and its concentration detection, in particular to a silver film resistive atomic oxygen sensor. In addition, the present invention also relates to an atomic oxygen detector comprising the above-mentioned silver film resistance atomic oxygen sensor and its application method. Background technique [0002] Atomic oxygen is the most abundant component (accounting for about 80%) of neutral gases in low earth orbit (200-1000km), and it is also the most serious environmental factor affecting spacecraft. Atomic oxygen has strong oxidizing properties and high-speed collision energy, and has a strong eroding effect on spacecraft materials. [0003] The research on the effect of space atomic oxygen needs to be detected with the help of equipment with excellent performance and simple structure. At present, the main measurement methods such as Kapton (polyimide) membrane mas...

Claims

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Application Information

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IPC IPC(8): G01N27/04
Inventor 陈小前绳涛程云郝东胡星志
Owner NAT UNIV OF DEFENSE TECH
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