Electronic Sphygmomanometer Dual Battery Switching Control
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Solution Overview
Problem
Conventional electronic sphygmomanometers face challenges in accurately indicating the remaining number of measurements due to varying battery consumption based on pressurization time, blood pressure, and ambient temperature, leading to inefficient battery use and potential measurement interruptions.
Innovation Solution
An electronic sphygmomanometer with a power supply unit comprising a primary battery and a secondary battery, along with a switching control unit that selects the appropriate battery source based on detected characteristic values and weather forecasts, ensuring continuous operation and efficient battery usage by switching between batteries during measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single battery (primary or secondary) is used, then the device structure is simple, but the measurement may be interrupted when battery capacity runs out
Solution Approach 1:
The power supply system is segmented into a primary battery unit and a secondary battery unit, each capable of independently powering the device. This segmentation allows the system to switch between battery types, ensuring continuous operation when one battery depletes while maintaining relatively simple individual battery structures.
2Duration of action of moving object
If battery replacement/charging is performed when voltage is sufficient, then battery life is extended, but measurement may be interrupted and user convenience is reduced
Solution Approach 1:
The system performs preliminary assessment of battery voltage and predicts remaining measurement capacity before actual depletion occurs. By proactively switching batteries based on predicted capacity rather than waiting for complete depletion, the system extends overall battery life while ensuring measurements are never interrupted, as the switch occurs before the current battery becomes insufficient.
Solution Approach 2:
The control unit continuously monitors battery voltage and provides feedback to determine optimal switching timing. This feedback mechanism allows the system to dynamically adjust battery usage based on real-time voltage levels, extending battery life while maintaining measurement availability by switching at the optimal moment rather than at fixed thresholds.
3Adaptability or versatility
If the rechargeable battery is charged by solar energy, then external charging equipment is eliminated, but charging speed is slow and may not meet usage demands
Solution Approach 1:
The power supply system is segmented into a primary battery unit and a secondary battery unit, each capable of independently powering the device. This segmentation allows the system to switch between battery types, ensuring continuous operation when one battery depletes while maintaining relatively simple individual battery structures.
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
The solution allows for reliable and efficient use of both batteries, preventing measurement interruptions and optimizing battery life by selecting the appropriate power source based on real-time conditions, ensuring uninterrupted blood pressure measurements.
Implementation Method 1
a solar battery for receiving sunlight and converting received light energy into electric energy
Data Source
AI summary
A power supply unit of an electronic sphygmomanometer includes a dry cell as a primary battery, a rechargeable battery as a secondary battery, and a power supply control circuit. A voltage detector detects a voltage (characteristic value) of the rechargeable battery, and a voltage detector detects the voltage of the dry cell. A switching control unit performs switching control of the dry cell and the rechargeable battery based on a detection result by the voltage detectors.