Portable Nebulizer Foam Detection and Shutdown Control
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Solution Overview
Problem
Conventional portable nebulizers often misjudge the remaining medical fluid due to foam formation, leading to continuous vibration and potential damage when the fluid is depleted, reducing the device's service life.
Innovation Solution
A portable nebulizer with a sensing device and processing unit that calculates medical fluid volume indication information by analyzing sensing and driving signals, determining when to execute a shutdown procedure to prevent continuous vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional portable nebulizers use simple liquid level detection, then the device structure remains simple, but the detection precision deteriorates due to foam interference causing misjudgment of medical fluid volume
Solution Approach 1:
The patent implements a feedback mechanism where the sensing device continuously monitors the medical fluid volume and provides real-time feedback to the processing device. The processing device compares the detected volume with preset thresholds and automatically adjusts the nebulization operation accordingly, ensuring accurate detection despite foam interference and preventing continuous operation when fluid is depleted.
Solution Approach 2:
The patent introduces an intermediary processing device that acts as a mediator between the sensing device and the nebulization device. This processing device analyzes the sensing signals, distinguishes between foam and actual liquid levels, and makes intelligent decisions about when to shutdown the nebulization, thereby improving detection precision without requiring direct complex sensing mechanisms.
2Reliability
If the nebulization device continues to vibrate after medical fluid depletion, then the device maintains operational readiness, but the reliability deteriorates due to continuous vibration causing damage and reduced service life
Solution Approach 1:
The patent applies preliminary action by detecting the medical fluid volume in advance using the sensing device and processing device. When the fluid volume falls below the threshold, the system proactively shuts down the nebulization device before complete depletion occurs, preventing damage from continuous vibration and extending device service life.
Solution Approach 2:
The feedback mechanism continuously monitors medical fluid volume and automatically triggers shutdown when the threshold is reached, ensuring the nebulization device stops operation at the appropriate time to avoid damage from prolonged vibration after fluid depletion.
3Measurement precision
If the processing device uses complex algorithms to distinguish foam from liquid, then the measurement precision improves, but the ease of operation worsens due to increased system complexity
Solution Approach 1:
The processing device serves as an intermediary that implements complex foam-liquid distinction algorithms while shielding the user from this complexity. The device automatically analyzes sensing signals, distinguishes foam from actual liquid levels, and makes intelligent shutdown decisions, maintaining high measurement precision without burdening the user with system complexity.
Solution Approach 2:
The system performs self-service by automatically detecting and distinguishing foam from liquid, and autonomously making shutdown decisions without requiring user intervention or manual judgment. The processing device independently handles the complex analysis and control logic.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents the nebulizer from vibrating unnecessarily when the medical fluid is used up, thereby extending its service life and avoiding damage.
Implementation Method 1
the nebulization device is configured to nebulize the predetermined medical fluid and simultaneously transmit a sensing signal to the sensing device
Implementation Method 2
The nebulization methods currently used in medical-grade portable nebulizers can be generally divided into pneumatic or ultrasonic types, which can convert the medical liquid into aerosol particles
Data Source
AI summary
A portable nebulizer and a shutdown method of the portable nebulizer are provided. The portable nebulizer includes a medicine storage device, a sensing device, a nebulization device, a driving device and a processing device. The medicine storage device is configured to contain predetermined medical fluid. The sensing device is located in the medicine storage device. The nebulization device is configured to nebulize the predetermined medical fluid and simultaneously transmit a sensing signal to the sensing device. The driving device is electrically connected to the nebulization device and transmits a driving signal to the nebulization device. The processing device is electrically connected to the sensing device and the driving device, and collects electrical information of the sensing signal and electrical information of the driving signal to calculate medical fluid volume indication information.