Breast Pump Optical Sensing for Automatic Milk Flow Switching
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Solution Overview
Problem
Existing breast pumps lack the ability to automatically detect the onset of milk expression for seamless transition from stimulation to expression mode, relying on time-based or manual methods that are not personalized to individual women's milk ejection reflexes.
Innovation Solution
A sensor system using optical emitters and detectors to detect the presence of the first milk droplets in the collection vessel, enabling automatic switching between stimulation and expression modes by altering the optical path based on the presence of milk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time-based switching or manual button pushing is used to transition from stimulation mode to expression mode, then the breast pump can operate with simple control logic, but the switching timing is not personalized and may be too early or too late for individual women's milk ejection reflexes
Solution Approach 1:
The patent replaces manual button pushing or simple time-based control with an optical sensing system that automatically detects milk flow. Optical emitters and detectors monitor the collection vessel to sense when milk drops appear, triggering automatic mode transition. This substitutes mechanical/user-initiated control with optical-field-based automatic detection, achieving personalized timing without proportional increases in system complexity.
Solution Approach 2:
The breast pump system performs self-monitoring through the optical sensor arrangement that automatically detects milk expression onset. The system serves itself by autonomously determining when to switch modes based on optical detection of milk drops, eliminating the need for user intervention or manual timing adjustments. The pump adapts to each user's unique milk ejection reflex timing through this self-service detection mechanism.
2Ease of operation
If manual button pushing is used to switch modes, then the control system remains simple, but the user must continuously monitor and check the bottle to determine when milk flow has started
Solution Approach 1:
The patent replaces manual visual monitoring and button pushing with an optical sensing system. Optical emitters directed at the collection vessel and detectors positioned to receive reflected or transmitted light automatically sense the presence of milk drops. This substitutes the mechanical action of user monitoring with optical field interactions, enabling automatic mode switching while maintaining manageable system complexity through established optical sensing techniques.
Solution Approach 2:
The optical sensor arrangement provides continuous feedback about milk flow status to the pump's control system. The detectors monitor light interactions with the collection vessel contents and signal when milk drops appear, creating a feedback loop that automatically triggers mode transition. This feedback mechanism eliminates the need for manual checking while keeping the system relatively simple by using direct optical detection rather than complex sensor arrays.
3Measurement precision
If optical sensors are used to detect milk drops, then automatic and personalized mode switching is achieved, but the device complexity increases due to additional sensor arrangements
Solution Approach 1:
The patent employs optical emitters and detectors to sense milk drop presence through light interaction with the collection vessel. This optical detection method achieves precise measurement of the first milk drop appearance, replacing any more complex mechanical or electronic sensing approaches. The optical system provides high measurement precision for detecting transparent liquid drops without requiring complex sensor arrangements.
Solution Approach 2:
The collection vessel serves as an intermediary element in the optical detection system. Optical emitters direct light through or toward the vessel, and detectors positioned to receive light that has interacted with the vessel contents detect milk drops. The vessel acts as a mediator that enables optical sensing of milk presence, achieving precise detection while keeping the sensor arrangement itself relatively simple by utilizing the existing vessel structure.
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
Enables precise and personalized automatic switching between modes, improving user experience by ensuring timely milk collection without manual intervention.
Implementation Method 1
an optical path between the optical emitter arrangement and the optical detector arrangement is changed by the presence of milk
Implementation Method 2
an optical path between the optical emitter arrangement and the optical detector arrangement is changed by the presence of milk
Data Source
AI summary
A sensor system is for sensing the start of milk expression into a collection vessel when using a breast pump device. An optical sensor is used to provide a signal indicating the presence of the first milk expressed, for use in controlling the breast pump to switch from a stimulation mode to an expression mode.