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Trace water detecting device by taking water inside component of optical fiber gas sensor as reference

A technology of gas sensor and optical fiber collimator, which is applied in the direction of color/spectral characteristic measurement, etc., can solve problems that have not been considered, and achieve the effect of convenient waveform adjustment and cost saving

Inactive Publication Date: 2013-06-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water in the fiber optic gas sensor device has not been considered in this trace water gas detection device.

Method used

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  • Trace water detecting device by taking water inside component of optical fiber gas sensor as reference
  • Trace water detecting device by taking water inside component of optical fiber gas sensor as reference

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 of the device of the present invention is as follows Figure 1-2 As shown, it includes a calibration system, a DFB laser 2, an air chamber 3, a fiber collimator 4, a PIN photodetector 5, a differential amplifier circuit 6, a filter circuit 7 and a single-chip microcomputer 1, and is characterized in that the DFB laser 2 is located in front of the air chamber 3 , the fiber collimator 4 is located in the gas chamber 3, the PIN photodetector 5 is located behind the fiber collimator 4, the fiber collimator 4 is coupled to the PIN photodetector 5 through a single-mode fiber connection, and the PIN photodetector 5 outputs The terminal is connected to an input terminal of the differential amplifier circuit 6, the output terminal of the differential amplifier circuit 6 is connected to the filter circuit 7, and the output terminal of the filter circuit 7 is connected to the A / D acquisition terminal of the single-chip microcomputer 1; the single-chip computer 1 and th...

Embodiment 2

[0037] A method for calibrating the water content inside the device using the calibration system of the above-mentioned detection device, the steps are as follows:

[0038] Connect the calibration system; turn on the power of the oscilloscope, turn on the power of the calibration system; debug the optical path and circuit to make it work normally;

[0039] Connect the photoelectric conversion signal of the second PIN photodetector and the trapezoidal wave signal generated by the single-chip microcomputer to the two input ends of the differential amplifier circuit; adjust the magnification of the photoelectric conversion signal of the second PIN photodetector, and connect the oscilloscope to the second PIN photoelectric conversion signal. The output terminal of the PIN photodetector observes its waveform until the amplitude and slope of the photoelectric conversion signal of the second PIN photodetector are consistent with the trapezoidal wave signal generated by the single-...

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PUM

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Abstract

The invention discloses a trace water detecting device by taking water inside a component of an optical fiber gas sensor as a reference, belonging to the technical field of optical fiber detection. The trace water detecting device comprises a calibrating system, a DFB (Distributed Feed Back) laser, an air chamber, a PIN (Personal Identification Number) photoelectric detector, a single chip microcomputer and the like. The calibrating system is used for calibrating the water content inside a device; the DFB laser is located in front of the air chamber; an optical fiber collimator is located in the air chamber; the PIN photoelectric detector is located behind the optical fiber collimator; the output end of the PIN photoelectric detector is connected with one input end of a differential amplification circuit; the output end of the differential amplification circuit is connected with a filter circuit; the output end of the filter circuit is connected with the A / D (Analog-to-Digital) collection end of the single chip microcomputer; the single chip microcomputer is connected with the DFB laser and used for providing driving current for the DFB laser; and the single chip microcomputer is connected to one input end of the differential amplification circuit and used for providing an input signal for the input end of the differential amplification circuit. The device has the advantages of electromagnetic radiation resistance, corrosion resistance and simple technology and is convenient to carry and stable in performance and low in cost.

Description

technical field [0001] The invention relates to a trace water gas detection device using the water inside an optical fiber gas sensor device as a reference, and belongs to the technical field of optical water gas detection. Background technique [0002] Pure SF 6 The gas is a colorless, odorless, non-toxic gas that will not burn, has stable chemical properties, does not chemically react with other substances at room temperature, has non-combustible properties, and is superior to insulating oil, so it has good insulation properties and extinguishing properties. Arc characteristics, under normal conditions, is an ideal insulating medium. SF6 load switch is an excellent load switch experienced by many users in recent years. In addition to having the same advantages as vacuum load switches, such as long electrical life and strong breaking force, its outstanding advantage is that it is easy to realize three working positions (on , disconnection and grounding), small current (in...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 常军王强刘永宁王福鹏朱存光魏巍高婷王伟杰
Owner SHANDONG UNIV
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