Carbon monoxide (CO) concentration and visibility detector and detection method thereof

A visibility and concentration technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of difficult light source power variation error, large error of high visibility, cumbersome calculation formula, etc., and achieve the effect of light weight, cost saving and small volume

Inactive Publication Date: 2013-06-05
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The scattering method has the following disadvantages: first, the sampling space is relatively small, and the representativeness is slightly poor; second, the high visibility error is large, and the error caused by the system light source power change and lens dust is difficult to correct; third, the calibration is relatively difficult, The calculation formula is cumbersome

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  • Carbon monoxide (CO) concentration and visibility detector and detection method thereof
  • Carbon monoxide (CO) concentration and visibility detector and detection method thereof
  • Carbon monoxide (CO) concentration and visibility detector and detection method thereof

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Embodiment Construction

[0051] The present invention will be described in detail below according to the accompanying drawings and embodiments.

[0052] figure 1 It is a schematic diagram of the structure of the CO concentration and visibility detection system. Such as figure 1 As shown, the CO concentration and visibility detector of the present invention includes: a circuit board 1, a turntable 2, a casing 3, a first reflector 4, a detector 5, an infrared light source 6, a first through hole 7, a second through hole 8, The second mirror 9, the third mirror 10, the first lens 11, the second lens 12 and a stepping motor (not shown in the figure).

[0053] The stepper motor is fixed on the circuit board 1, and its output shaft is fixedly connected to the center of the turntable 2. The turntable 2 is provided with a first through hole 7 and a second through hole 8, and the second reflector 9 and the third reflector 10 are fixed On turntable 2. The detector 5 and the infrared light source 6 are welde...

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Abstract

The invention discloses a carbon monoxide (CO) concentration and visibility detector and a detection method. The CO concentration and visibility detector comprises an infrared thermal light source, a double-filtering-piece infrared pyroelectric detector, a reference light path measuring the light intensity of the light source under an ideal environment, a measurement light path measuring the light intensity of the light source under an actual environment, a turntable for switching the two light paths and a circuit board for data acquisition and processing. The CO concentration and visibility detector achieves simultaneous detection of CO concentration and visibility, only needs one set of light paths, a mechanical structure, a hardware circuit, the single light source and a unit-doublet detector, can eliminate scattered infrared light, dust on a camera lens and errors caused by absorption of system parts and is accurate in measurement. A dual-wavelength method is adopted to detect gas concentration, a high-concentration gas reference air chamber is omitted, and a system structure is simplified. The detector is small in size and convenient to use.

Description

technical field [0001] The invention relates to the field of CO gas concentration and visibility detection, in particular to a detection instrument for measuring CO concentration with dual wavelengths based on infrared spectrum theory while measuring visibility with a transmission method and a dual wavelength method for measuring gas concentration in the atmosphere. Background technique [0002] CO gas concentration and visibility are important meteorological factors in terms of traffic, environment, and climate. The level of CO gas concentration and visibility has a direct impact on people's outdoor activities. When the CO concentration increases and the visibility becomes poor, it will seriously endanger personal safety, especially the transportation industry. Therefore, real-time detection of CO concentration and visibility is necessary. [0003] Commonly used gas analysis methods are: electrochemical method, electrical method, chromatography, infrared and ultraviolet op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/01G01N21/78
Inventor 高丽梅姚军吕颖琦
Owner ZHEJIANG UNIV
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