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A gas sampling device and its gas path system and method

A gas sampling and gas detection technology, applied in sampling devices, measuring devices, preparation of samples for testing, etc., can solve the problems of limited detection capability of sensors, impact on test accuracy, cross-contamination of samples, etc., to improve the detection capability of equipment , Reduce the effect of test interference

Active Publication Date: 2016-08-24
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This sampling method limits the detection capability of the sensor, and the samples are prone to cross-contamination between multiple samplings, which affects the test accuracy

Method used

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  • A gas sampling device and its gas path system and method
  • A gas sampling device and its gas path system and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like figure 1 The gas sampling device according to the present invention shown includes an air inlet hose 3, an adsorption tube 5 and an air outlet hose 105 arranged in sequence, and a dustproof device 4 is arranged on the air inlet of the air inlet hose 3. , the dustproof device 4 ensures the gas sample amount required for the test while preventing dust and impurities from entering the gas path, the adsorption tube 5 is filled with adsorption material 101, and the adsorption tube 5 is wrapped with a heating device 6, so The heating device 6 preferably adopts a heating wire, which can be wound on the adsorption tube 5, but is not limited to the heating wire, and other heating devices 6 can also be used. The material 101 can adsorb a series of gas components including the test target components. After the sampling reaches the set time, the adsorbent material 101 has adsorbed enough gas concentration samples for detection. At this time, the heating device 6 starts to work...

Embodiment 2

[0035] A pneumatic system such as figure 2As shown, it includes a fixed substrate 1, and the fixed substrate 1 is preferably a PCB board, which can specifically use a PCB board of FR-4, CEM-3, CEM-1, 22F or 94VO, and the fixed substrate 1 is provided with a gas Detection device 7, sampling pump 2, activated carbon tube 12 and the gas sampling device described in embodiment 1, the gas outlet hose 105 of the gas sampling device is connected with the air inlet of the one-way valve 11 through the trachea, the single The gas outlet of the valve 11 communicates with the gas detection device 7 through a trachea, and the gas detection device 7 can adopt an existing conventional design. The sampling pump 2 communicates, and the sampling pump 2 communicates with the a port of the electromagnetic valve 8 through the air pipe. The electromagnetic valve 8 is a three-way electromagnetic valve 8, and the c port of the electromagnetic valve 8 is connected with one end of the activated carbon...

Embodiment 3

[0039] A gas path control method using the gas path system described in Embodiment 2, comprising the following steps:

[0040] S1. Open the one-way valve 11, the solenoid valve 8 keeps the a-b port conducting, start the sampling pump 2, set the sampling time of the sampling pump 2 according to the working mode, and set the sampling time according to the different working modes. Setting different sampling times, increasing the sampling time is conducive to the detection of low-concentration samples, improving the detection sensitivity and enhancing the detection capability of the equipment;

[0041] S2. When the set sampling time is reached, after the adsorption material 101 has adsorbed the high-concentration sample object to be tested, the sampling pump 2 stops working, and the heating device 6 starts to heat the adsorption tube 5 quickly, so that the adsorption The temperature of the material 101 is rapidly raised to about 200 degrees Celsius, reaching the dissociation tempe...

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Abstract

The invention relates to a gas sampling device as well as a gas path system and a a gas path method adopting the gas sampling device, wherein the gas sampling device comprises a gas inlet hose, an adsorption pipe and a gas outlet hose which are sequentially arranged, the adsorption pipe is filled with an adsorbing material and coated with a heating device, the heating device is further coated with a heating insulating sleeve, two ends of the adsorption pipe are respectively communicated with thick-walled hard pipes arranged in a gas outlet of the gas inlet hose and a gas inlet of the gas outlet hose, metal filter screens are respectively arranged on two ends of the adsorbing material in the adsorption pipe. The gas sampling structure of the traditional gas detection equipment is improved, the small adsorption pipe with the enrichment function is integrated on the sampling path, so that the detection of low-concentration objects can be effectively realized and the detection capability of equipment can be improved; in addition, the gas path system is provided with a gas detection device cleaning path, the zeroing of a sensor of the gas detection device can be realized after each working, and the testing interference can be reduced.

Description

technical field [0001] The invention relates to a gas detection device, in particular to a gas sampling device and a gas path system and method using the same. Background technique [0002] Gas detection equipment is widely used to detect atmospheric pollutants, food volatile gases, explosives, poisonous gases, biological and chemical warfare agents and other substances. The standard method for gas concentration detection is generally a gas or liquid chromatograph, but the equipment is generally bulky and requires carrier gas, expensive, and complicated to operate, and is not suitable for applications in harsh environments such as fields, battlefields, and industrial sites. There is an increasing need to develop simple, easy-to-use and portable gas analysis equipment. [0003] Portable gas analysis equipment is mainly composed of the following parts: sampling unit, sensing unit, data analysis unit, main control unit and human-computer interaction unit. The sampling unit is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G01N1/24G01N1/28
Inventor 姚佳周连群李传宇郭智慧刘敏范梅生
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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