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Micro intermediate infrared 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 increasing the secondary development cost of the device, increasing the development cost of the gas chamber, and the difficulty of space restrictions, etc., to achieve improvement The effect of safety, guarantee of safety, and assurance of monitoring accuracy

Inactive Publication Date: 2014-03-26
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 intermediate infrared gas concentration monitoring method and device
  • Micro intermediate infrared gas concentration monitoring method and device
  • Micro intermediate infrared gas concentration monitoring method and device

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Embodiment Construction

[0020] Taking CO2 and CH4 as examples, the structure of this embodiment is as follows 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 mid-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 firmly bonded, the mid-infrared light source 11 and the dual-channel infrared detector 12 are installed on the circuit board I8, and the six circuit pins 10 are welded on the circuit board II9 and protrude to facilitate electrica...

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Abstract

The invention provides a micro intermediate infrared gas concentration monitoring method and a micro intermediate infrared gas concentration monitoring device. According to the device, a double-wavelength infrared monitoring theory is adopted, and a reasonable micro structure design is supplemented, so that a micro focal-point-free multi-reflection gas chamber is formed; a golden reflection film is plated on the inner wall of the gas chamber to enhance the reflection of infrared light, so that an infrared detector can acquire enough information for reflecting the concentration of detected gas in a tiny space. Filtration and waterproof prevention are executed through a structure consisting of a filter net and a waterproof ventilation film; the monitoring precision is guaranteed, and the gas chamber and an optical element can be protected. The device supplies a data output pin and an alarm output pin which are used for externally outputting a gas concentration digital signal and an open collector alarm signal; the device can meet the requirements for the gas concentration alarm of dangerous places. The device has digital signal processing and temperature compensation functions, has the advantages of high monitoring precision, stability, reliability and the like and can meet a requirement on the monitoring of the gas concentration in an intermediate infrared absorption region.

Description

technical field [0001] The invention belongs to the field of gas concentration monitoring, and specifically relates to a miniature mid-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 mid-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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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3518
Inventor 赵建华陈迎春
Owner UNIV OF SCI & TECH OF CHINA
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