Atomizer control method and control system

Abstract

The invention provides an atomizer control method and system, and relates to the technical field of atomizers, according to the atomizer control method, the air injection speed is controlled to be gradually increased to the target speed from the preset minimum speed according to the preset acceleration curve, the discomfort in the starting stage is reduced, and the stability of the atomizer is improved. Atomizing airflow is dynamically adjusted through breathing frequency, acoustic characteristics or airflow intensity, it is ensured that the speed of spraying airflow fluctuates within a safety threshold value, and the purpose of personalized spraying is achieved. According to the atomizer control system, the gradual acceleration module controls the air injection speed to be gradually increased to the target speed from the preset minimum speed according to the preset acceleration curve, the discomfort in the starting stage is reduced, the feedback control module dynamically adjusts the atomization airflow through the breathing frequency, the acoustic characteristics or the airflow intensity, and the atomization effect is improved. The speed of the spraying airflow is ensured to fluctuate within a safety threshold value, and the purpose of personalized spraying is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of atomizers, and more particularly to an atomizer control method and a control system therefor. Background Art

[0002] An atomizer mainly converts a liquid medicine into a gas and enters the respiratory tract through the patient's mouth or nose in the form of a spray. Compared with traditional medication or injection treatment, atomizer inhalation treatment for patients with respiratory diseases such as asthma and chronic obstructive pulmonary disease has many advantages. Therefore, atomizers have been widely used and developed.

[0003] However, traditional atomizers generally adopt a direct full-speed start mode, resulting in discomfort caused by instantaneous airflow impact to patients, especially children who are prone to fear. In addition, the existing technology lacks the ability to respond in real time to abnormal breathing events and there is a risk of misoperation. Summary of the Invention

[0004] In view of this, one of the objectives of the present invention is to provide an atomizer control method to solve the technical problem that the atomizer in the existing technology does not have the ability to adjust the atomizer speed according to the patient's reaction to inhaled atomization.

[0005] Another objective of the present invention is to provide an atomizer control system.

[0006] To achieve the above objective, the present invention provides an atomizer control method, including the following steps:

[0007] Obtain the air injection speed;

[0008] Control the air injection speed to gradually increase from a preset minimum speed to a target speed according to a preset acceleration curve;

[0009] Real-time collect the breathing frequency, acoustic characteristics and airflow intensity;

[0010] Dynamically adjust the atomization airflow based on the breathing frequency, the acoustic characteristics or the airflow intensity to ensure that the speed of the spray airflow fluctuates within a safety threshold.

[0011] Optionally, it further includes determining whether the breathing frequency, the acoustic characteristics or the airflow intensity is abnormal, and if so, triggering an emergency response mechanism.

[0012] Optionally, the emergency response mechanism includes a three-level response mechanism, namely:

[0013] First-level response: reduce the spray speed;

[0014] Second-level response: pause the spray;

[0015] Level 3 response: Execute the adaptive recovery program.

[0016] Optionally, the reduced spray speed is that the single-cough trigger spray speed is reduced to 50%; the paused spray is that continuous coughing for 5 seconds triggers the spray to pause and gives an audible and visual alarm; the execution of the adaptive recovery program is that respiratory arrest triggers the system to shut down.

[0017] Optionally, the adaptive recovery program adopts an exponential approach algorithm:

[0018]

[0019] where v pause is the pause speed, v target is the target speed, and k is the recovery rate constant, which is dynamically adjusted according to the user's age and medical history.

[0020] Optionally, the acceleration curve is an S-shaped function, and the S-shaped function is a cubic spline interpolation algorithm, and its mathematical expression is:

[0021] v(t) = v min +(v target -v min )·(3t 2 -2t 3 )

[0022] where t ∈ [0, T], T is the total acceleration duration, v min is the initial speed, and v target is the target speed.

[0023] To achieve the second of the above purposes, the present invention provides a nebulizer control system, including:

[0024] An air flow control module for adjusting the air injection speed of the nebulizer;

[0025] A progressive acceleration module, when the nebulizer starts, controls the air flow control module to gradually increase from a preset minimum speed to a target speed according to a preset acceleration curve, where the acceleration curve is an S-shaped curve;

[0026] A breathing monitoring module, including a multi-modal sensor group, for real-time collection of the user's breathing frequency, airflow intensity, and acoustic characteristics;

[0027] An abnormal event processing module for detecting coughing or breathing, and when coughing or shortness of breath occurs, triggering an emergency response mechanism, and the emergency response mechanism includes reducing the spray speed, pausing the spray, or executing an adaptive recovery program;

[0028] A feedback control module for dynamically adjusting the spray flow rate based on the sensor data of the multimodal sensor group to ensure that the spray speed fluctuates within a safe threshold.

[0029] Optionally, the multimodal sensor group includes:

[0030] A MEMS microphone for capturing the sound pressure level and spectral characteristics of coughing sounds;

[0031] A thermal airflow sensor for measuring the volumetric flow rate of respiratory airflow;

[0032] A piezoelectric film sensor for detecting the acceleration of chest vibration;

[0033] The data from the MEMS microphone, the thermal airflow sensor, or the piezoelectric film sensor is input into an abnormal event classifier after being fused by Kalman filtering.

[0034] The atomizer control method provided by the present invention has the following technical effects:

[0035] This atomizer control method starts by controlling the air injection speed from a preset minimum speed and gradually increases it to the target speed according to a preset acceleration curve, reducing the discomfort during the start-up phase. It dynamically adjusts the atomizing airflow based on the breathing frequency, acoustic characteristics, or airflow intensity to ensure that the speed of the spray airflow fluctuates within a safe threshold, achieving the purpose of personalized spraying.

[0036] The atomizer control system provided by the present invention has the following technical effects:

[0037] In this atomizer control system, the progressive acceleration module starts by controlling the air injection speed from a preset minimum speed and gradually increases it to the target speed according to a preset acceleration curve, reducing the discomfort during the start-up phase. The feedback control module dynamically adjusts the atomizing airflow based on the breathing frequency, acoustic characteristics, or airflow intensity to ensure that the speed of the spray airflow fluctuates within a safe threshold, achieving the purpose of personalized spraying. Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 It is a flowchart of the atomizer control method of the present invention. Detailed Embodiments

[0040] To make the objectives, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope protected by the present invention.

[0041] Based on the defects described in the background art, the atomizer control method and the atomizer control system of the present invention will be described in detail below with specific embodiments.

[0042] Embodiment 1:

[0043] As Figure 1 shown, it is a flowchart of the atomizer control method, including the following steps:

[0044] Obtain the air injection speed;

[0045] Control the air injection speed to start from the preset minimum speed and gradually increase to the target speed according to the preset acceleration curve;

[0046] Collect the breathing frequency, acoustic characteristics and airflow intensity in real time;

[0047] Dynamically adjust the atomizing airflow based on the breathing frequency, acoustic characteristics or airflow intensity to ensure that the speed of the spray airflow fluctuates within the safety threshold;

[0048] Judge whether the breathing frequency, acoustic characteristics or airflow intensity is abnormal. If it is abnormal, trigger the emergency response mechanism.

[0049] The emergency response mechanism includes a three-level response mechanism, which are respectively:

[0050] First-level response: Reduce the spray speed to 50% of the spray speed triggered by a single cough;

[0051] Second-level response: Pause the spray. When continuous coughing lasts for 5 seconds, trigger the spray pause and give an audible and visual alarm;

[0052] Third-level response: Execute the adaptive recovery program. When respiratory arrest occurs, trigger the system to shut down.

[0053] Embodiment 2:

[0054] As Figure 1 shown, it is a flowchart of the atomizer control method, including the following steps:

[0055] Obtain the air injection speed;

[0056] Control the air injection speed to start from the preset minimum speed and gradually increase to the target speed according to the preset acceleration curve;

[0057] Collect the respiratory rate, acoustic characteristics, and airflow intensity in real time;

[0058] Dynamically adjust the atomizing airflow based on the respiratory rate, acoustic characteristics, or airflow intensity to ensure that the speed of the spray airflow fluctuates within the safety threshold;

[0059] Determine whether the respiratory rate, acoustic characteristics, or airflow intensity is abnormal. If abnormal, trigger an emergency response mechanism.

[0060] The emergency response mechanism includes a three - level response mechanism, namely:

[0061] First - level response: Reduce the spray speed;

[0062] Second - level response: Pause the spray;

[0063] Third - level response: Execute an adaptive recovery program. Among them, the adaptive recovery program adopts an exponential approach algorithm:

[0064]

[0065] Among them, v pause is the pause speed, v target is the target speed, and k is the recovery rate constant, which is dynamically adjusted according to the user's age and medical history.

[0066] As a preferred implementation, the acceleration curve is an S - shaped function. The S - shaped function is a cubic spline interpolation algorithm, and its mathematical expression is:

[0067] v(t)=v min +(v target -v min )·(3t 2 -2t 3 )

[0068] Among them, t ∈ [0, T], T is the total acceleration duration, v min is the initial speed, and v target is the target speed.

[0069] Abnormal event test: Simulate a cough sound (sound pressure level 90 dB, duration 0.5 s), and the system reduces the spray speed from 20 L / min to 5 L / min within 480 ms.

[0070] Table 1 Comparison table of comfort levels in the startup stage

[0071] Test object Prior art (direct start) The present invention (S-type acceleration) Children's group (n = 30) Discomfort score 4.2 / 5 1.8 / 5 Adult group (n = 20) Discomfort score 3.5 / 5 1.2 / 5

[0072] According to the comparison table of comfort levels in the startup stage, it can be concluded that the acceleration curve of the S - shaped function adopted by the present invention has lower discomfort.

[0073] Table 2 Abnormal Response Time Test Table

[0074] Event type Prior art response time Response time of the present invention Single cough 2.8 seconds 0.48 seconds Continuous cough No response 0.5 seconds Respiratory arrest 10 seconds 3 seconds

[0075] According to the abnormal response time test table, it can be concluded that the exponential approach algorithm adopted by the present invention has a shorter response time.

[0076] Embodiment 2:

[0077] This embodiment provides an atomizer control system, including:

[0078] An air flow control module for adjusting the air injection speed of the atomizer;

[0079] A progressive acceleration module that, when the atomizer starts, controls the air flow control module to start from a preset minimum speed and gradually increase to the target speed according to a preset acceleration curve, where the acceleration curve is an S-shaped curve;

[0080] A breathing monitoring module including a multi-modal sensor group for real-time acquisition of the user's breathing frequency, airflow intensity, and acoustic characteristics;

[0081] An abnormal event handling module for detecting coughing or breathing, and triggering an emergency response mechanism when coughing or breathing is rapid. The emergency response mechanism includes reducing the spray speed, pausing the spray, or executing an adaptive recovery program;

[0082] A feedback control module for dynamically adjusting the spray flow based on the sensor data of the multi-modal sensor group to ensure that the spray speed fluctuates within a safe threshold.

[0083] As an alternative implementation, the multi-modal sensor group includes:

[0084] A MEMS microphone for capturing the sound pressure level and spectral characteristics of coughing sounds;

[0085] A thermal airflow sensor for measuring the volumetric flow rate of the breathing airflow;

[0086] A piezoelectric film sensor for detecting the acceleration of chest vibration;

[0087] The data from the MEMS microphone, thermal airflow sensor, or piezoelectric film sensor is input into the abnormal event classifier after Kalman filter fusion.

[0088] The hardware configuration of this embodiment is:

[0089] Main control chip: STM32F407VGT6 (Cortex-M4 core);

[0090] Driver circuit: DRV8305 three-phase full-bridge driver;

[0091] Power management: TP4056 lithium battery charging management module.

[0092] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for controlling an atomizer, characterized in that, It includes the following steps: Obtain the air injection speed; Control the air injection speed to start from a preset minimum speed and gradually increase to the target speed according to a preset acceleration curve; Collect the breathing frequency, acoustic characteristics and airflow intensity in real time; Dynamically adjust the atomizing airflow based on the breathing frequency, the acoustic characteristics or the airflow intensity to ensure that the speed of the spray airflow fluctuates within a safe threshold.

2. The atomizer control method according to claim 1, wherein It also includes judging whether the breathing frequency, the acoustic characteristics or the airflow intensity is abnormal. If it is abnormal, trigger an emergency response mechanism.

3. The atomizer control method according to claim 2, wherein The emergency response mechanism includes a three-level response mechanism, which are respectively: First-level response: Reduce the spray speed; Second-level response: Pause the spray; Third-level response: Execute an adaptive recovery program.

4. The atomizer control method according to claim 3, wherein The reduction of the spray speed means that the spray speed is reduced to 50% when a single cough is triggered; the pause of the spray means that the spray is paused and an audible and visual alarm is issued when continuous coughing lasts for 5 seconds; the execution of the adaptive recovery program means that the system shuts down when respiratory arrest occurs.

5. The atomizer control method according to claim 3, characterized in that, The adaptive recovery program adopts an exponential approach algorithm: where v pause is the pause speed, v target is the target speed, and k is the recovery rate constant, which is dynamically adjusted according to the user's age and medical history.

6. The atomizer control method according to claim 1, wherein The acceleration curve is an S-shaped function, and the S-shaped function is a cubic spline interpolation algorithm, and its mathematical expression is: v(t) = v min + (v target - v min )·(3t 2 - 2t 3 ) where \(t\in[0,T]\), \(T\) is the total duration of acceleration, \(v\) min is the initial velocity, and \(v\) target is the target velocity.

7. An atomizer control system, characterized in that, It includes: An air flow control module for adjusting the air injection speed of the atomizer; A progressive acceleration module, when the atomizer is started, controls the air flow control module to start from a preset minimum speed and gradually increase to the target speed according to a preset acceleration curve, wherein the acceleration curve is an S-shaped curve; A breathing monitoring module, including a multi-modal sensor group, for collecting the breathing frequency, airflow intensity and acoustic characteristics of the user in real time; An abnormal event processing module for detecting coughing or breathing. When coughing or rapid breathing occurs, trigger an emergency response mechanism, and the emergency response mechanism includes reducing the spray speed, pausing the spray or executing an adaptive recovery program; A feedback control module for dynamically adjusting the spray flow based on the sensor data of the multi-modal sensor group to ensure that the spray speed fluctuates within a safe threshold.

8. The atomizer control system according to claim 7, wherein The multi-modal sensor group includes: A MEMS microphone for capturing the sound pressure level and spectral characteristics of coughing sounds; A thermal airflow sensor for measuring the volume flow of breathing airflow; A piezoelectric film sensor for detecting the acceleration of chest vibration; The data of the MEMS microphone, the thermal airflow sensor or the piezoelectric film sensor are input into an abnormal event classifier after being fused by Kalman filtering.

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