Personalized Heartbeat Simulation Using Photoelectric Pulse Sensor
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Solution Overview
Problem
Existing devices for simulating a mother's heartbeat for infants in resource-limited settings are either error-prone due to the use of stethoscope-like devices or require pre-recorded heartbeats, and artificially generated heartbeats lack individual variations in heart rate.
Innovation Solution
A personalized heartbeat simulation apparatus using a photoelectric pulse sensor to capture and record the mother's heartbeat, with an analog signal sampling module, logic and memory module, and sound replay module to play back a realistic audible heartbeat with varying intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a stethoscope-like device is used to capture the mother's heartbeat, then the heartbeat signal can be recorded and replayed, but the device becomes error-prone when used by untrained people
Solution Approach 1:
The patent replaces the mechanical stethoscope system with an optical photoelectric pulse sensor system. The sensor uses light absorption changes to detect heartbeat, eliminating the need for mechanical contact and expert operation. This substitution maintains measurement accuracy while dramatically improving ease of use for untrained caregivers.
Solution Approach 2:
The patent introduces a photoelectric sensor as an intermediary between the mother's body and the recording system. Instead of requiring direct stethoscope placement on the chest, the sensor can be placed on accessible areas like the finger or wrist, using blood flow-induced light absorption changes to indirectly detect heartbeat. This intermediary approach simplifies operation while preserving accuracy.
2Ease of manufacture
If artificial heartbeat generation is used, then a heartbeat simulation can be provided, but the heartbeats lack individual variations of the mother's heartbeat
Solution Approach 1:
The patent implements a copying mechanism that captures the mother's actual heartbeat pattern and stores it in memory. The system then replays this recorded pattern to generate realistic heartbeat simulations. This copying approach preserves all individual variations in the mother's heartbeat while eliminating the need for complex artificial generation algorithms.
Solution Approach 2:
The patent performs preliminary recording of the mother's heartbeat pattern before the actual soothing session. The system captures and stores the heartbeat intervals in advance, then uses this pre-recorded data during playback. This preliminary action ensures that all individual variations are captured and can be reproduced later without requiring real-time generation.
3Ease of operation
If a photoelectric pulse sensor is used to capture heartbeat, then the device becomes easy to use, but additional components (sampling module, logic module, sound module) are required
Solution Approach 1:
The patent merges multiple functions into integrated modules. The photoelectric sensor, signal sampling circuitry, heartbeat interval analysis logic, and sound playback system are combined into a single unified device. This integration maintains ease of use by providing a plug-and-play solution while managing component complexity through functional consolidation rather than separate devices.
Solution Approach 2:
The patent creates a multi-functional device that performs sensing, signal processing, data storage, and sound generation within a single system. The logic module serves multiple purposes: it analyzes the photoelectric signal to detect heartbeat intervals, stores these intervals in memory, and controls the timing of sound playback. This multi-functionality reduces the number of separate components needed while maintaining operational simplicity.
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
Provides a continuous, realistic simulation of a mother's heartbeat that is easy to use and resource-independent, effectively replicating the natural heart rate variations for comfort during parental absence.
Implementation Method 1
the chosen design for the heartbeat module uses an easy-to-use photoelectric pulse sensor, that can be wrapped around the finger of the mother, to capture a heartbeat signal
Data Source
AI summary
Existing infant warming solutions comprise a bedding element, a thermoregulation element and an element to produce sounds beneficial for the infant. The most beneficial among these sounds is the heartbeat of the infant's own mother. Capturing the heartbeat well enough to enable recording and accurate, realistic replay usually requires the use of a stethoscope-like instrument by a trained person and is an error-prone process for an untrained one, making it impractical for mass use. This invention improves the state-of-the-art by using an easy-to-capture but imperfect signal, for example, from a photoelectric sensor placed on the mother's finger, to still produce a realistic simulated heartbeat sound with the mother's heartrate. This makes the invention a suitable choice for infant warming solutions intended for mass use. The invention comprises an analog signal sampling module, a logic and memory module, and a sound replay module for the audible replay of electronically stored sounds.