Real-time measuring method of respiratory flow in working states

Abstract

The invention discloses a real-time measuring method of respiratory flow in working states, and relates to the technical field of respiratory monitoring. The method comprises the following steps: firstly, a quadratic function relationship between differential pressure values and the respiratory flow is obtained; secondly, coal miners wear respiratory monitors and work in different workplaces to measure the differential pressure values inside and outside respirators in different working states of the coal miners, and the differential pressure values are stored in a data storage instrument; andfinally, the data storage instrument is connected to a computer, and the respiratory flow is calculated according to the functional relationship between the pressure difference and the respiratory flow. According to the method, a pressure difference sensor is installed on each respirator to collect the pressure difference caused by respiration of the coal miners in the different working states inreal time, the respiratory flow of the workers in the on-site real-time working states is obtained according to the quadratic function relationship between the pressure difference and the respiratoryflow obtained by experiments, and the respiratory flow of the coal miners during work are accurately measured to provide basic parameters for the development of a test flow standard of mining respirators.

Description

technical field [0001] The invention relates to the technical field of respiratory monitoring, in particular to a method for real-time measurement of respiratory flow in an operating state. Background technique [0002] With the depletion of shallow coal resources, more and more mines are facing the problem of deep mining. The high in-situ stress in the deep part makes the coal fragmentation extremely serious, forming a soft coal body with pulverized structure characteristics, which provides a large number of dust sources for mine dust. At the same time, the improvement of coal mining mechanization level and mining intensity also increases the dust generation, and the original dust concentration of fully mechanized mining face can reach 8000-10000mg / m 3 . [0003] In order to reduce the degree of pollution at the working face, my country has applied dust suppression measures such as coal seam water injection, spray dust removal, and water curtain dust suppression technolog...

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Problems solved by technology

[0005] The dust-proof performance of existing respirators is significantly affected by the breathing flow rate. In the process of formulating the respirator test flow standard, the determination of the breathing flow rate is mainly based on the calculation of the metabolic index to obtain the air volume required by the human body per unit time. The time-varying and dynamic respiratory flow deviation is relatively large, so the respirator test flow standard formulated according to the calculation results is not suitable for the actual working condition, and the dustproof effect is not ideal

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