Nipple-Shield Thermal Microsensor for Real-Time Milk Volume Measurement
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Solution Overview
Problem
Existing breastfeeding volume measurement devices require bulky physical sensors and electronics, leading to separation from the mother's breast and inaccuracies in real-time milk volume measurement.
Innovation Solution
A flexible nipple shield with a flow sensor comprising thermally sensitive resistive elements, allowing accurate real-time milk volume measurement without physical separation, using a minimally sized sensor module and wireless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If bulky physical sensors and electronics are used for milk volume measurement, then measurement capability is achieved, but separation from the mother's breast is required and measurement accuracy deteriorates
Solution Approach 1:
The patent replaces bulky mechanical flow sensors with a microsensor that utilizes thermal principles. Instead of mechanical turbines or reciprocating pistons, the invention uses a thermal sensor that measures milk flow based on heat transfer characteristics, enabling direct integration into the nipple shield without requiring physical separation or complex mechanical components.
Solution Approach 2:
The patent changes the measurement parameter from mechanical flow detection to thermal property detection. By measuring temperature changes and heat transfer in the milk flow, the system achieves accurate volume measurement with a miniaturized sensor that can be directly integrated into the breastfeeding device without requiring separation from the breast.
2Measurement precision
If direct real-time milk flow measurement is implemented, then accurate volume information is provided, but physical bulk of sensor requires separation of baby from mother's breast
Solution Approach 1:
The patent replaces mechanical flow sensors with a thermal microsensor that can be directly integrated into the nipple shield. This substitution eliminates the need for physical separation during breastfeeding, as the thermal sensor has minimal bulk and can be positioned within the milk channel without interfering with the baby's ability to nurse naturally.
Solution Approach 2:
The patent transitions from mechanical dimension (physical bulk) to thermal dimension (heat transfer measurement). By measuring thermal properties rather than using mechanical sensors, the system achieves real-time measurement capability with minimal physical presence, allowing direct contact between baby and breast without separation.
3Device complexity
If indirect proxy measurements are used to derive milk volume, then device complexity is reduced, but measurement accuracy deteriorates
Solution Approach 1:
The patent replaces complex indirect measurement systems (acoustic swallow detection, Doppler flow, skin conductivity) with a simple thermal microsensor. This direct thermal measurement approach provides accurate real-time milk volume data while maintaining device simplicity, avoiding the inaccuracies and complexity of indirect proxy methods.
Solution Approach 2:
The thermal microsensor directly measures the thermal properties of the milk itself as it flows through the channel. The milk's own thermal characteristics are used for measurement, eliminating the need for complex intermediary systems or proxy measurements, thereby achieving both simplicity and accuracy.
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 real-time, accurate milk volume measurement directly from the breast to the baby, minimizing sensor size and channel length, and providing convenient data logging and display.
Implementation Method 1
a flow sensor provided within the flow-channel in the nipple shield and in contact with the milk flow
Implementation Method 2
the flow sensor comprises two members mounted in the flow channel and perpendicular to the direction of the milk flow, both members having thermally sensitive resistive elements mounted or integrated therein
Implementation Method 3
One member remains unheated and is thus capable of measuring ambient milk temperature, while the other is heated to a known temperature increase or delta above this ambient value
Data Source
Figure 1
Figure 2A~2D
Figure 2E
AI summary
A nipple-shield mounted sensor with associated electronic interface and interconnect for measurement and display of milk flow and volume during breastfeeding. The sensor is mounted in the tip of the nipple-shield in order to minimise intrusion between mother and child. The sensor can be mounted transverse or parallel to the milk flow in the channel depending on the selected sensing technology. The dimensions of the sensor and associated cabling are such that the device does not appear substantially different to a nipple-shield alone, thereby having minimal impact on the feeding session. Microlitre flow levels are measured directly by the sensor in order to relay accurate, real-time information on milk volume back to the feeding mother. The electronics unit amplifies the sensor input and digitally processes the data with software algorithms to determine the fluid volume, and can be directly integrated in the shield or can constitute an external module depending on the nature of the sensing technology integrated in the flow channel.