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Micro far infrared type gas concentration monitoring method and device

A gas concentration and monitoring device technology, which is applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve the problems of space limitation, increase the development cost of the gas chamber, and increase the secondary development cost of the device. Monitoring accuracy, improving safety effect

Inactive Publication Date: 2014-04-02
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to construct a reflective air chamber with a focal point, rigorous calculations and precision machining are required to obtain it, which increases the development cost of the air chamber
Usually, it is more difficult to integrate a more complex digital signal processing circuit on a tiny device, because of space constraints, people have to use complex external circuit development to reflect the concentration of the gas to be measured, which increases the secondary cost of the device. development cost

Method used

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  • Micro far infrared type gas concentration monitoring method and device
  • Micro far infrared type gas concentration monitoring method and device
  • Micro far infrared type gas concentration monitoring method and device

Examples

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Embodiment Construction

[0021] Take SO2 and SF6 as example, the structure of the present embodiment is as figure 1 and figure 2 As shown, it consists of a waterproof breathable membrane 1, an outer shell 2, a filter screen 3, an air chamber wall I4, an air chamber wall II5, an air chamber wall III6, an inner lining 7, a circuit board I8, a circuit board II9, 6 circuit pins 10, The far-infrared light source 11 and the dual-channel infrared detector 12 form a whole. Its structure is: the waterproof breathable membrane 1 is closely attached to the shell 2, the filter screen 3, the air chamber wall Ⅰ4, the air chamber wall Ⅱ5, the air chamber wall Ⅲ6, the inner lining 7, the circuit board Ⅰ8, and the circuit board Ⅱ9, which are sequentially loaded into the shell Inside and bonded firmly, 6 circuit pins 10 are welded on the circuit board II9 and protrude to facilitate electrical connection with the outside. The far-infrared light source 11 and the dual-channel infrared detector 12 are installed on the c...

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Abstract

The invention provides a micro far infrared type gas concentration monitoring method and device. According to the device, a dual wavelength infrared monitoring principle is adopted, a reasonable micro structure design is supplemented, a micro focus-free multiple reflection gas chamber is formed; the inner wall of the gas chamber is provided with a reflection film in a plating manner, so that the reflection on infrared light can be improved, enough information can be obtained by an infrared detector to reflect the concentration of monitored gas in a tiny space; a diaphragm and a window film are additionally arranged to converge a far infrared light source, so as to obtain far infrared light needed by measurement; the structure of a filtering net and a waterproof permeable film are adopted for performing filtering and waterproof protection, and the monitoring precision is guaranteed while the gas chamber and optical elements are also protected. The device is provided with data output pins and alarming output pins which can be used for outputting digital signals of the gas concentration and alarming signals of an open collector and is capable of meeting the demand of gas concentration alarming on hazardous occasions.

Description

technical field [0001] The invention belongs to the field of gas concentration monitoring, and specifically relates to a miniature far-infrared gas concentration monitoring method and device, which adopts a microstructure, a dual-wavelength infrared monitoring principle, and comes with digital signal processing and temperature compensation, and is suitable for gas concentration monitoring in the far-infrared band Methods and devices. Background technique [0002] Dual-wavelength infrared gas concentration monitoring is one of the current research hotspots. It has the following advantages: it can measure a variety of gases, wide measurement range, high sensitivity, high precision, good stability, good selectivity, high reliability, and long life. . [0003] In many fields, the requirements for the external dimensions of gas concentration monitoring devices are relatively strict. The device of the present invention has obvious advantages in many places of installation and app...

Claims

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Application Information

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IPC IPC(8): G01N21/3504G01N21/3581
Inventor 赵建华陈迎春
Owner UNIV OF SCI & TECH OF CHINA
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