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Photoacoustic spectrometry oil and gas monitoring unit

A technology of monitoring unit and photoacoustic spectroscopy, which is applied in the detection field, can solve the problems that it is difficult to control the periodic change of the laser light and the signal processing effect is not good, and achieve the effect of high accuracy and improved precision

Pending Publication Date: 2020-08-25
HUBEI INFOTECH SYST TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention aims at the technical problems in the photoacoustic spectrum oil and gas monitoring unit in the prior art that it is difficult to control the periodic change of the laser emitted by the laser and the signal processing effect derived from the acoustic sensor is not good. The invention provides

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  • Photoacoustic spectrometry oil and gas monitoring unit
  • Photoacoustic spectrometry oil and gas monitoring unit
  • Photoacoustic spectrometry oil and gas monitoring unit

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Embodiment Construction

[0043] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0044] Such as figure 1 A photoacoustic spectroscopy oil and gas monitoring unit is shown, including:

[0045] The photoacoustic pool 1 is hollow inside, and provides a closed space for oil and gas monitoring by photoacoustic spectroscopy. The photoacoustic pool 1 is equipped with a laser 2 inside, which is used to emit laser light of a specific wavelength. The laser 2 is equipped with a temperature-regulating semiconductor. Set the temperature of the temperature-adjusting semiconductor so that the temperature of the laser 2 remains constant, so that the wavelength of the laser emitted by the laser 2 will change with the change of the current, so that the laser 2 can be controlled only by controlling the current of ...

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Abstract

The invention discloses a photoacoustic spectrometry oil and gas monitoring unit which comprises a photoacoustic cell, wherein a temperature adjusting semiconductor is arranged in a laser, and a gas inlet is formed in a photoacoustic cell body; a sound-sensitive element which is used for detecting the pressure wave generated in the photoacoustic cell and outputting an output signal of the sound-sensitive element; a signal processing circuit which is used for processing a signal output by the sound-sensitive element; a central processing unit which is used for analyzing the signals, receiving the signals and sending instructions, wherein the central processing unit is externally connected with a power supply circuit; a laser driving circuit which is used for controlling the laser to generate laser with a specific wavelength. The wavelength of laser emitted by the laser in the monitoring unit is easy to control and can be easily enabled to change periodically, deviation of a finally obtained spectrogram is prevented, detection precision is improved, signals led out by the sound-sensitive element are subjected to multi-stage processing, the detection precision is further improved, andthe acoustic spectrum oil and gas monitoring unit is sensitive and high in accuracy.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a photoacoustic spectrum oil and gas monitoring unit. Background technique [0002] The principle of the existing oil and gas monitoring unit is to place the substance in a closed container. The substance will be excited after absorbing light of a specific wavelength, and the excited substance will return to the initial state through a radiative transition or a non-radiative transition. This process will produce heat; if the wavelength of the absorbed light changes periodically, the pressure fluctuations in the container are also periodic; since the frequency of the modulated light is generally in the audio frequency range, the pressure fluctuations become sound waves; Perception, the electrical signal obtained by synchronous amplification of the acoustic signal perceived by the acoustic sensor is an optical signal. If the photoacoustic signal is recorded as a function of the f...

Claims

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Application Information

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IPC IPC(8): G01N21/17G01N21/39G01N21/01
CPCG01N21/01G01N21/1702G01N21/39G01N2021/1704G01N2021/391G01N2201/06113G01N2201/12G01N2201/126
Inventor 李玉林易国华许立群杨军徐辉陈斌
Owner HUBEI INFOTECH SYST TECH CO LTD
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