Biological Sensor Power Cutoff via One-Shot Pulse Circuit
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Solution Overview
Problem
Conventional biological information measurement devices experience unintended power consumption when a blood glucose level sensor is left mounted after measurement, as the control unit remains in a sleep mode with continuous power supply, leading to high power consumption.
Innovation Solution
A one-shot pulse circuit is interposed between the sensor mounting unit and the power source switch drive circuit, which outputs a single pulse signal to turn on the power source switch, and a power source cutoff timer circuit turns off the power supply after a predetermined time, preventing continuous power delivery to the control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the control unit is set into the idle state (or sleep state) to suppress power consumption, then power consumption is reduced, but power is continuously supplied from the power source to the control unit, causing unintended power consumption
Solution Approach 1:
The power source switch is extracted from the continuous power supply path, allowing the power source to be completely disconnected from the control unit when not in use. This separates the power supply function from the control unit operation, enabling true power-off state rather than just sleep mode.
Solution Approach 2:
The power source switch acts as an intermediary between the power source and the control unit. It mediates the power flow by being controlled by the power source switch drive circuit, which is in turn controlled by the one-shot pulse circuit detecting sensor mounting status. This intermediary mechanism enables automated power management.
2Ease of operation
If a large liquid crystal or large-scale electric circuit is provided to enhance convenience, then functionality and user experience are improved, but power consumption increases significantly
Solution Approach 1:
The power supply system is made dynamic through the automated switching mechanism. The power source switch dynamically transitions between on and off states based on sensor mounting status, allowing the system to adapt its power consumption to actual usage conditions rather than maintaining constant power supply.
Solution Approach 2:
The power supply parameter (power flow to control unit) is changed from a constant state to a variable state controlled by the one-shot pulse circuit and power source switch drive circuit. This parameter change enables the system to optimize power consumption based on operational needs.
Data Source
AI summary
A biological information measurement device of the present invention includes: measurement unit (7) connected to sensor mounting unit (4); control unit (8) connected to measurement unit (7); power source switch (14) interposed between control unit (8) and power source (13); and power source switch drive circuit (11) connected to sensor mounting unit (4). One-shot pulse circuit (12) is interposed between sensor mounting unit (4) and power source switch drive circuit (11), and power source switch drive circuit (11), which is driven by an output of one-shot pulse circuit (12), opens and closes power source switch (14).