Device and method for detecting sulfur dioxide gas

A sulfur dioxide and gas technology, which is used in measurement devices, material analysis by optical means, color/spectral property measurement, etc., can solve the problems of time-consuming concentration measurement, cumbersome equipment maintenance, insensitive response, etc., and achieves short measurement time. Easy to maintain and solve time-consuming effects

Inactive Publication Date: 2010-11-10
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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[0011] The main purpose of the present invention is to provide a device and method for detecting sulfur dioxide gas, so as to realize the detection of sulfur diox

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  • Device and method for detecting sulfur dioxide gas
  • Device and method for detecting sulfur dioxide gas
  • Device and method for detecting sulfur dioxide gas

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[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0036] like figure 1 as shown, figure 1 It is a structural schematic diagram of a device for detecting sulfur dioxide gas provided by the present invention. The device consists of a quantum cascade laser 1 and its drive power 7, a ZnSe lens 2, a gas chamber 3, a dual-way microphone power supply 4, a lock-in amplifier 5 and a computer 6 components; wherein, the driving power supply 7 excites the quantum cascade laser 1 to emit mid-infrared light with a wavelength of 7.36 microns, and the mid-infrared light is converged into parallel light by the ZnSe lens 2 and enters the gas chamber 3 to generate an acoustic signal in the gas chamber, It is collected by a pair of high-sensitivity microphones in the gas chamber and tran...

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Abstract

The invention discloses a device and a method for detecting sulfur dioxide gas. The device comprises a quantum cascade laser (1) and a driving power supply (7) thereof, a ZnSe lens (2), a gas chamber (3), a double-path microphone power supply (4), a phase-locking amplifier (5) and a computer (6), wherein the driving power supply (7) excites the quantum cascade laser (1) to emit middle infrared light with the wavelength of 7.36 micrometers, the middle infrared light is converged into parallel light through the ZnSe lens (2) and enters the gas chamber (3) in which sound signals are generated, the sound signals are respectively collected and transmitted to the double-path microphone power supply (4) by a pair of high-sensitivity microphones in the gas chamber and then are transformed into electric signals, the generated electric signals are inputted to the phase-locking amplifier (5) for differencing and signal extraction, and finally signal values are recorded and stored by the computer (6), thereby obtaining the concentration of gas to be detected by calculating the signal values. The invention solves the problems of high time consumption, insensitive reaction, complicated operation and tedious equipment maintenance of the traditional method for measuring gas concentrations.

Description

technical field [0001] The invention relates to the technical field of sulfur dioxide gas detection, in particular to a device and method for detecting sulfur dioxide gas. Background technique [0002] Sulfur dioxide is a poisonous gas. People with heart disease and respiratory diseases are most sensitive to this gas. Even normal people can get sick if they stay in places with high sulfur dioxide concentration for too long. When the concentration of sulfur dioxide in the air is only 1ppm, people will feel a sense of oppression in the chest. [0003] Sulfur dioxide mainly comes from the combustion of coal and oil. my country is a big coal-producing country, but also a big country that consumes coal and oil. At present, the economic losses caused by acid rain and sulfur dioxide pollution to the ecological environment and human health are about 110 billion yuan every year in China. In the future, this kind of pollution will continue to increase with the development of China. T...

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Application Information

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IPC IPC(8): G01N21/35G01N29/34G01N21/3504
Inventor 刘万峰王利军刘峰奇王占国
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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