Bidirectional double-pressure-difference type respiratory flow detecting and sensing device and method

Abstract

The invention discloses a bidirectional double-pressure-difference type respiratory flow detecting and sensing device. The device comprises a throttling element, two differential pressure sensors, a processing module and a power supply module for supplying power, the two differential pressure sensors are respectively connected to the throttling element and are used for synchronously acquiring differential pressure signals, the processing module comprises a microprocessor, a control module, a storage module and a display module, the control module, the storage module and the display module areelectrically connected to the microprocessor, a system software program is solidified on the microprocessor, the microprocessor receives two paths of differential pressure signals and processes the differential pressure signals to obtain measurement data, the measurement data is displayed by the display module and stored by the storage module, and the control module controls the operation state ofthe processing module. The sensing device is simple in structure, stable, reliable, low in cost, capable of meeting the requirements for wide respiratory flow measuring range and high flow low-speedprecision, and suitable for respiratory flow two-way measurement in resting and moving states. The invention further provides a bidirectional double-pressure-difference type respiratory flow detectingand measuring method.

Description

technical field [0001] The invention relates to the technical field of medical testing instruments, in particular to a two-way double-pressure differential breathing flow detection sensor device and method. Background technique [0002] Human respiratory flow is one of the key indicators for the clinical diagnosis and evaluation of lung diseases. Especially, the measurement of respiratory flow during exercise can reflect the patient's exercise capacity and cardiopulmonary function. It is often used in rehabilitation treatment and preoperative evaluation of patients. In the state of exercise, the respiratory rate of the human body is accelerated, and the depth and intensity of breathing increase accordingly, accompanied by body motion interference signals. Compared with the static respiratory flow, the respiratory flow in the exercise state has the characteristics of large range and unstable signal. [0003] At present, the flow sensors commonly used for respiratory flow moni...

AI Technical Summary

Problems solved by technology

Fleish-type and Lilly-type flowmeters produce a linear pressure drop across the capillary mesh barrier, but their capillary mesh structure is prone to clogging and is difficult to clean

The improvement of the porous balance flowmeter makes the range ratio of the flow measurement wide (greater than 10:1), the requirement for the straight pipe section is low, and the pressure loss is low (only 1 / 3 of the traditional differential pressure flowmeter), but it is vulnerable to the through-hole The influence of the rear eddy current makes the static pressure value jump and the signal is unstable

In the existing technology, the technical means that can be used for bidirectional measurement of respiratory flow in resting and exercising states are still lacking

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