Device for recognizing zone classification of anesthetic gas type and method thereof

An anesthetic gas and regional classification technology, applied in the field of identifying anesthetic gas types, can solve the problems of production process limitations, difficulty in meeting monochromatic light requirements, complex filter parameters, etc., and achieve the effect of reducing hardware costs.

Active Publication Date: 2007-09-26
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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Problems solved by technology

[0004] Since the Beer-Lambert law is only applicable to monochromatic light, and the filter has a certain bandwidth, it is difficult to filter light to meet the requirements of monochromatic light. The logarithm of the attenuation of light is a nonlinear correspondence; the matrix equation mentioned in the above-mentioned U.S. Patents 4,914,719, 5,046,018 5,231,591 is a nonlinear equation, and the solution of the nonlinear equation needs to use the second-order or above variables of N measurement signals ( See US Patents 5,046,018 and 5,231,591), while it is very difficult to solve matrix equations with multiple variables
It is also possible to solve the matrix equation into a linear equation by designing specific filter parameters (see US Patent No. 4,914,719), but designing such filter parameters is also complicated and is often limited by the production process

Method used

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  • Device for recognizing zone classification of anesthetic gas type and method thereof
  • Device for recognizing zone classification of anesthetic gas type and method thereof
  • Device for recognizing zone classification of anesthetic gas type and method thereof

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Embodiment Construction

[0034] The device and method of the present invention will be described in further detail below in conjunction with the preferred embodiments shown in the drawings.

[0035] As shown in Fig. 3, the device for classifying and identifying anesthetic gas types of the present invention includes:

[0036] A measuring optical circuit assembly, including an infrared light source 1, a filter wheel 3, a detection gas chamber 5, an infrared sensor 6 and a signal amplification processing circuit 7, which are arranged in sequence, for converting the concentration signal of the anesthetic gas to be measured in the measuring optical path The filter wheel 3 is placed between the light source and the detection gas chamber, and is driven by the motor 2 to rotate at a certain frequency; the measuring optical path assembly also includes a synchronous light source 15 located in the filter The signal synchronization device composed of the synchronous light-passing hole 16 on the optical disc wheel 3 a...

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Abstract

This invention discloses one paralyse gas type area sort identification device and method, wherein, the device uses multiple measurement filter slice and one reference filter to get multiple measurement signals and one reference signal to get signal to compute different concentration paralyse gas through each channel relative absorptive parameters; the relative absorptive parameter takes look of certain area polymer characters to establish two-dimensional or higher relative absorptive parameters coordinates according to the paralyse gas infrared property and to get each paralyse gas each relative map area.

Description

Technical field [0001] The present invention relates to the technical field of using optical means to test or analyze materials, and in particular to a method and device for identifying the type of anesthetic gas by using infrared light absorption characteristics. The method and device of the present invention are particularly suitable for automatically identifying the type of anesthetic gas in the patient's breathing mixed gas during surgical anesthesia, and can also be used for the detection of other industrial or medical mixed gas. Background technique [0002] At present, the measurement principle of gas concentration monitors in the field of medical equipment is based on non-dispersive infrared spectroscopy (NDIR, Non-Dispersive Infrared), that is, according to the absorption characteristics of a certain band of infrared light by the measured gas, select a specific band The infrared light passes through the gas sample, and the attenuation of the infrared light and the concen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35
CPCG01N2021/3174G01N2021/3133G01N21/314G01N21/274G01N21/3504
Inventor 周惠玲张伟武志刚
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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