A method and device for controlling gas volume accuracy by calibrating k value

Abstract

The invention discloses a method for controlling gas volume accuracy by calibrating the K value. The method includes: the control module collects the sampling value P collected by the differential pressure sensor S Convert to instantaneous pressure value P V ; The gas flowmeter detects the instantaneous gas flow rate F of the gas circuit device per unit time; the control module calculates the gas flow rate F of the gas circuit device 1 ;according to F 1 Adjust the actual gas flow rate F of the gas circuit device 2 ;Judging the real-time sampling value P S <=P S '. If yes, actual gas flow rate F 2 is 0, the actual air intake V=0; otherwise, the control module according to F 2 Calculate the actual intake volume V of the gas circuit device; determine whether V meets the accuracy requirements close to the real value, if the accuracy requirements are met, the K value calibration is successful, otherwise adjust the K value; this method can be used for tidal volume detection and endotracheal intubation Detection; the Venturi tube is discarded in the process of tidal volume detection, no complicated and accurate calibration is required, and accurate gas volume data can be obtained through a custom calibration algorithm, which greatly saves development costs and man-hours; in the process of endotracheal intubation , Abandoning various sensors, only by comparing the values ​​of various channels, can judge whether the endotracheal intubation is correct.

Description

technical field

[0001] The invention relates to a method and device for controlling gas volume accuracy by calibrating K value, especially applicable to the detection of tidal volume and vital capacity and the detection of tracheal intubation in the process of medical simulation teaching. Background technique

[0002] Tidal volume (TV) is the volume of air that is inhaled or exhaled per breath while breathing calmly. Vital capacity refers to the amount of gas that can be exhaled after one maximum inhalation and then the maximum capacity under the condition of unlimited time, which represents the maximum functional activity of the lungs at one time, and is one of the repeated functional indicators reflecting the growth and development level of the human body. Vital capacity can show a person's cardiopulmonary function, and a person with a large lung capacity has a stronger body's ability to supply oxygen. The tidal volume detection method on most medical education products i...

Examples

Embodiment 1

[0073] Embodiment one: refer to figure 2 , the tidal volume detection method according to the embodiment of the present invention comprises the following steps:

[0074] Step S101: The control module collects the sampling value P collected by the differential pressure sensor S Convert to instantaneous pressure value P V , where P S is the sampling value collected by the differential pressure sensor, the specific method is:

[0075] Step S1001: The differential pressure sensor collects real-time sampling values, denoted as P S , this data P S It is the complement code of 2 bytes, which is converted into the original code, which may be positive or negative;

[0076] Step S1002: multiple instantaneous sampled values ​​P S The final average value is obtained through the Kalman filter recursive algorithm or the average value algorithm, denoted as P t ;

[0077] Step S1003: The control module will obtain the average value P t Convert to instantaneous pressure value (floati...

Embodiment 2

[0098] Embodiment 2: The method disclosed in the present invention can also detect multiple channels at the same time. For example, the method can be used to determine the correctness of endotracheal intubation. ), the gas circuit device in the present invention includes an air intake hole connected to the air intake device, and three air intake holes are respectively connected to pipelines, the first pipeline is the left bronchus pipeline, the second pipeline is the esophagus, and the second pipeline is the esophagus. 3 tubes for the right bronchus and esophagus, V 左 is the intake volume of the left bronchus, V 右 is the intake volume of the right bronchus, V 食 is the intake volume of the esophagus; compare the intake volume of the three-way pipeline to determine whether the tracheal intubation operation is correct.

[0099] When calibrating the K value for tracheal intubation detection, if the hardware equipment required for calibration, such as multiple gas circuit devices...

technical field

[0001] The invention relates to a method and device for controlling gas volume accuracy by calibrating K value, especially applicable to the detection of tidal volume and vital capacity and the detection of tracheal intubation in the process of medical simulation teaching. Background technique

[0002] Tidal volume (TV) is the volume of air that is inhaled or exhaled per breath while breathing calmly. Vital capacity refers to the amount of gas that can be exhaled after one maximum inhalation and then the maximum capacity under the condition of unlimited time, which represents the maximum functional activity of the lungs at one time, and is one of the repeated functional indicators reflecting the growth and development level of the human body. Vital capacity can show a person's cardiopulmonary function, and a person with a large lung capacity has a stronger body's ability to supply oxygen. The tidal volume detection method on most medical education products i...

Examples

Embodiment 1

[0073] Embodiment one: refer to figure 2 , the tidal volume detection method according to the embodiment of the present invention comprises the following steps:

[0074] Step S101: The control module collects the sampling value P collected by the differential pressure sensor S Convert to instantaneous pressure value P V , where P S is the sampling value collected by the differential pressure sensor, the specific method is:

[0075] Step S1001: The differential pressure sensor collects real-time sampling values, denoted as P S , this data P S It is the complement code of 2 bytes, which is converted into the original code, which may be positive or negative;

[0076] Step S1002: multiple instantaneous sampled values ​​P S The final average value is obtained through the Kalman filter recursive algorithm or the average value algorithm, denoted as P t ;

[0077] Step S1003: The control module will obtain the average value P t Convert to instantaneous pressure value (floati...

Embodiment 2

[0098] Embodiment 2: The method disclosed in the present invention can also detect multiple channels at the same time. For example, the method can be used to determine the correctness of endotracheal intubation. ), the gas circuit device in the present invention includes an air intake hole connected to the air intake device, and three air intake holes are respectively connected to pipelines, the first pipeline is the left bronchus pipeline, the second pipeline is the esophagus, and the second pipeline is the esophagus. 3 tubes for the right bronchus and esophagus, V 左 is the intake volume of the left bronchus, V 右 is the intake volume of the right bronchus, V 食 is the intake volume of the esophagus; compare the intake volume of the three-way pipeline to determine whether the tracheal intubation operation is correct.

[0099] When calibrating the K value for tracheal intubation detection, if the hardware equipment required for calibration, such as multiple gas circuit devices...

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