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Device for analyzing oxygen density and flow rate and analysis method thereof

A technology of oxygen concentration and analysis method, applied in the field of oxygen analysis, can solve the problems of inability to monitor ultrasonic waves at the same time, large monitoring errors, etc., and achieve the effects of avoiding the decline of measurement accuracy, fast response speed and compact structure

Active Publication Date: 2009-12-02
SYSMED CHINA CO LTD
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Problems solved by technology

[0004] In order to solve the problem that the oxygen concentration and flow rate cannot be monitored simultaneously by ultrasonic waves, and the monitoring error is large, the purpose of the present invention is to provide a device and its analysis method that can continuously analyze the oxygen concentration and flow rate

Method used

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  • Device for analyzing oxygen density and flow rate and analysis method thereof
  • Device for analyzing oxygen density and flow rate and analysis method thereof
  • Device for analyzing oxygen density and flow rate and analysis method thereof

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] Such as figure 1 , image 3 and Figure 4 As shown, the device for analyzing oxygen concentration and flow rate of the present invention includes a sensor unit 1 and a signal processing control circuit. The sensor unit 1 includes a container 2 and the first and second circuit boards 4, 5 installed at both ends of the container 2. The container 2 of the present embodiment is cylindrical and 11 centimeters long; the container 2 has a cylindrical container cavity 12, The axial cross-sections of its two ports are trapezoidal; in the container 2, there are respectively inlet and outlet outer cavities 11,3, both of which are respectively arranged along the circumferential direction outside the container inner cavity 12, and the inlet and outlet outer cavities 11,3 The adjacent ends are all closed ends, and the other end communicates with the inner cavity ...

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Abstract

The invention relates to a device for analyzing the oxygen density and the flow rate by utilizing ultrasonic and an analysis method thereof. The device comprises a container; two ends of the container are respectively provided with a circuit board, and the container is internally provided with a container internal cavity; the external part of the container internal cavity is provided with an inlet external cavity and an outlet external cavity; an air inlet and an air outlet are arranged on the container, and are respectively communicated with the inlet external cavity and the outlet external cavity; and both circuit boards are respectively provided with an ultrasonic transducer, any one of which is provided with a temperature sensor inserted into the container internal cavity through long tube leg pins. The method comprises the following steps: a transmission unit is used for controlling one of the ultrasonic transducers to transmit ultrasonic and the other one to receive the ultrasonic; a switching network switches over and controls the transmission and receiving of the ultrasonic transducers, and simultaneously the temperature sensor is used for measuring oxygen temperature T; a receiving unit sends signals to a microcontroller to obtain the forward conduction time and reverse conduction time tf and tr; and then the density P and the flow rate Q of oxygen being measured are calculated through a function relationship. The invention has the advantages of fast response speed to density change, compact structure, and the like.

Description

technical field [0001] The invention relates to an oxygen analysis technology, in particular to a device and an analysis method for analyzing oxygen concentration and flow rate by ultrasonic waves. Background technique [0002] The main purpose of the oxygen generator is to separate the nitrogen and carbon dioxide in the air, and then output different concentrations of oxygen for medical treatment, aerospace, welding and other fields; for example, the molecular sieve oxygen generator can output oxygen with a concentration of up to 95.7%. But there is still 4.3% argon that cannot be filtered. Therefore, oxygen generators need to monitor the concentration and flow rate of output oxygen in practical applications, especially for applications in the medical field, it is crucial to supply patients with high-concentration oxygen at a constant flow rate. At present, the existing devices for monitoring the output oxygen concentration and flow rate use sensors. This type of sensor ma...

Claims

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Application Information

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IPC IPC(8): G01N29/024G01P5/24A61M16/00
Inventor 黄勇吴琦傅佳萍吴振军陈锋简越叶普鑫张玉谦仇宾王乾隆
Owner SYSMED CHINA CO LTD
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