Reflective Cavity Sensor Emitter for Signal Strength
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Solution Overview
Problem
Current pulse oximetry systems face challenges in achieving high-fidelity measurements due to motion-induced noise and limited light penetration, which affects the accuracy of physiological parameter monitoring.
Innovation Solution
The introduction of a reflective cavity in the sensor emitter to redirect light towards the tissue site, increasing light penetration and improving signal strength, combined with protective measures for connection points to prevent flexing and enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reflective cavity is added to redirect light towards the tissue site, then light penetration and signal strength are improved, but device complexity increases
Solution Approach 1:
The reflective cavity is integrated into the sensor emitter housing, merging the light redirection function with the existing structural components. This combination allows the reflective cavity to enhance light penetration and signal strength without requiring separate additional components, thereby improving measurement precision while minimizing the increase in device complexity.
2Reliability
If connection points are protected by inhibiting flex at the connection points, then reliability is improved, but device complexity increases
Solution Approach 1:
The sensor component is designed with pre-formed connection points that protrude along the edges, positioning them in locations that naturally resist flexing during sensor application and removal. This preliminary structural design protects the wire connections from mechanical stress and potential disconnection, thereby improving reliability without requiring additional protective components or complex assembly steps.
3Ease of operation
If the sensor is designed as low-profile, then ease of operation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The sensor emitter is designed with a low-profile housing that incorporates thin-walled structures and flexible materials, allowing the sensor to maintain a compact form factor for ease of operation. The housing includes integrated features such as the reflective cavity and connection point structures that are formed through precision molding processes, ensuring consistent dimensional tolerances and proper light redirection while maintaining the low-profile design.
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
This approach results in stronger and cleaner signals for physiological parameter measurements, enhancing the accuracy and reliability of pulse oximetry readings while maintaining a low-profile sensor design.
Implementation Method 1
a sensor emitter including a reflective cavity for re-directing light to a tissue site. By reflecting light towards the tissue site, the amount of light reaching the tissue site is thereby increased.
Data Source
AI summary
Aspects of the present disclosure include a sensor emitter including a reflective cavity for re-directing light to a tissue site. By reflecting light towards the tissue site, the amount of light reaching the tissue site is increased. The increased light can improve parameter measurements taken by a non-invasive physiological sensor by producing a stronger and/or cleaner signal. In an embodiment, the reflective cavity is formed on one or more lead frames of the sensor emitter, wherein the lead frames are capable of transmitting electrical signals to emitting elements coupled to the lead frames. Aspects of the present disclosure also include a sensor component configured to protect connection points of wires to conductive leads on the sensor components by inhibiting flex or bending at the connection points. Connection points can protrude along edges of the sensor component. Aspects of the present disclosure also include techniques and processes for producing low-profile sensors.