Intelligent expiration sampling method and device

Abstract

The invention relates to an intelligent expiration sampling method and device. The sampling method includes the steps that adjustment is carried out with the differential algorithm, advanced intervention means are adopted, the complexity degree of a driving program is simplified, tiny adjustment is achieved, and flow changes tend to be gentle; flow is mutually matched with a tested person with theiterative algorithm to seek the suitable rule, and the aim that flow is harmoniously and smoothly adjusted in a human-computer-interaction mode is achieved; the sample device comprises a breathing filtering module, a flow control module, a gas discharging device, a gas collecting device, a sensor, a control unit, an interface and the like, and during expiration, the flow is fed back to the control unit through the sensor to control the flow control module to adjust the required flow; airflow is completely discharged through the discharging device, then enters the gas collecting device to complete the sampling process, the intelligent flow control algorithm is used in the flow control module according to signal changes of the sensor, and human-computer-interaction operation and parameter setting are carried out on the interface.

Description

technical field [0001] The invention relates to an intelligent breath sampling method and device used in the field of endogenous exhaled gas detection. Background technique [0002] Studies have shown that there are many components in exhaled breath, which can help people understand the metabolic process of certain diseases, and have an indication effect on certain diseases, and even indicate the existence of pathogens of certain diseases. Examples of gases present in exhaled breath in research as well as clinical settings include nitric oxide (NO), carbon monoxide (CO), hydrogen sulfide (H 2 S), hydrogen (H 2 ), methane (CH 4 ), carbon dioxide (CO 2 ), oxygen (O 2 ) and volatile organic compounds VOC, etc. [0003] However, in order to obtain reliable and repeatable measurements, the flow rate, pressure and time of exhaled air must be tightly controlled. For example, in the technical standard for the determination of exhaled NO jointly formulated by the American Thora...

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Problems solved by technology

The self-supporting type has the following problems: 1) The performance of the mechanical structure cannot be guaranteed after long-term use, especially the original parts such as springs, which are prone to rust and other failures in the environment with high humidity during the breath test; 2) the mechanical structure The structure of this type is difficult to process (small aperture requires high precision), and production commissioning is difficult. Once the processing fails, it cannot be repaired.

The electric type has the following problems: 1) When blowing hard, the resistance is too large, and the servo will quickly close to the minimum, resulting in excessive air resistance, and it wi

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