A bi-directional dual-pressure differential respiratory flow detection sensor device and method

Abstract

A two-way dual-pressure differential respiratory flow detection sensor device of the present invention includes a throttling piece, two differential pressure sensors, a processing module and a power supply module for power supply, and the two differential pressure sensors are respectively connected to the throttle piece And synchronously collect the differential pressure signal. The processing module includes a microprocessor, a control module, a storage module and a display module. The control module, storage module and display module are respectively electrically connected to the microprocessor, and the system software program is solidified on the microprocessor. The microprocessor receives two differential pressure signals and processes them to obtain measurement data. The measurement data is displayed by the display module and saved by the storage module, and the control module controls the operation status of the processing module. The sensing device has a simple structure, is stable and reliable, and has low cost. At the same time, it meets the requirements of a wide measurement range of respiratory flow and high precision at low flow rates, and is suitable for bidirectional measurement of respiratory flow in resting and exercising states. The invention also proposes a two-way double-pressure differential respiratory flow detection and measurement 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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