Small-size oxygen measuring device based on porous material gas cell

A technology of porous materials and measurement devices, which is applied in measurement devices, analytical materials, color/spectral property measurement, etc., can solve the problems of difficulty in miniaturization of a single device and integration of multi-component and multi-point measurement systems, and achieves improved measurement response. Time, small size, and the effect of improving the degree of integration

Active Publication Date: 2012-08-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing oxygen measuring instrument based on tunable diode laser absorption spectroscopy technology is difficult to miniaturize

Method used

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  • Small-size oxygen measuring device based on porous material gas cell
  • Small-size oxygen measuring device based on porous material gas cell
  • Small-size oxygen measuring device based on porous material gas cell

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Experimental program
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specific Embodiment approach 1

[0013] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the small oxygen measuring device based on the porous material gas cell described in this embodiment, it includes signal acquisition controller 1, diode laser 2, fiber coupler 3, optical fiber 4, beam collimator 5, porous material gas Pool 6, detector 7, amplifier 8, power splitter 9, first phase locker 10 and second phase locker 11,

[0014] The output end of the signal acquisition controller 1 is connected to the input end of the diode laser 2, the optical output end of the diode laser 2 is connected to the input end of the fiber coupler 3, the output end of the fiber coupler 3 is connected to the input end of the optical fiber 4, and the optical fiber The output end of 4 is connected to the input end of the beam collimator 5, and the output end of the beam collimator 5 emits a parallel laser beam incident on the porous material gas cell 6, and the laser beam passing through...

specific Embodiment approach 2

[0016] Embodiment 2: In this embodiment, Embodiment 1 is further described. The central wavelength of the light wave emitted by the diode laser 2 is within the range of 759 to 767 nm.

specific Embodiment approach 3

[0017] Specific implementation mode three: the following combination figure 2 of image 3 Describe this embodiment, this embodiment will further explain Embodiment 1, the porous material gas cell 6 has two end face windows 6-3, and the two end face windows 6-3 are parallel to each other, and the output of the beam collimator 5 The end emits a laser beam vertically;

[0018] The upper and lower ends of the porous material gas pool 6 are respectively provided with an air inlet 6-1 and an air outlet 6-2;

[0019] Fillers are provided inside the porous material gas pool 6 .

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Abstract

The invention provides a small-size oxygen measuring device based on a porous material gas cell, belongs to the field of oxygen measurement, and aims at solving the problems that miniaturization of a single device and integration of a multi-component and multi-point measuring system are difficult to carry out as a large-volume gas cell is adopted by an existing oxygen measuring instrument based on tunable diode laser absorption spectroscopy. According to the small-size oxygen measuring device, an output end of a signal acquisition controller is connected with an input end of a diode laser, output light of the diode laser enters an optical fiber by an optical fiber coupler, light output by the optical fiber is output by a beam collimator and enters to the porous material gas cell and then enters a detector by laser beams in the porous material gas cell, an electric signal output end of the detector is connected with an input end of amplifier, an output end of the amplifier is connected with an input end of a power divider, and the two output ends of the power divider are both connected with an input end of the signal acquisition controller by a phase lock. The small-size oxygen measuring device is used for measuring the concentration of oxygen.

Description

technical field [0001] The invention relates to a small oxygen measuring device based on a porous material gas cell, belonging to the field of oxygen measurement. Background technique [0002] The most widely used instrument in the field of oxygen measurement is the zirconia oxygen meter based on chemical principles. However, this technology belongs to contact measurement, and the detection device is prone to saturation poisoning, which affects the accuracy of the measurement results, and the sensing probe is easily corroded, so that the effective service life of the instrument generally does not exceed two years. In contrast, oxygen measuring instruments based on laser spectroscopy technology have the advantages of non-contact and long service life. Especially the oxygen measurement system based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) has the advantages of high sensitivity and low energy consumption. Although TDLAS uses a small diode laser light source to r...

Claims

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Application Information

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IPC IPC(8): G01N21/01G01N21/39
Inventor 娄秀涛瑞小川张治国
Owner HARBIN INST OF TECH
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