Vibration Capsule Power Regulation for Longer Battery Life
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Solution Overview
Problem
Ingestible medical devices, such as vibration capsules, face limited battery life due to high power consumption by vibration motors, leading to premature battery depletion and inability to sustain long-term operation.
Innovation Solution
A vibration capsule with a power supply regulation unit that alternates power from two button cell batteries to the vibration source using MOSFETs and a DC-DC converter, reducing supply voltage and power consumption while ensuring safe and extended vibration time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a button cell battery is used to power the vibration motor, then the vibration motor can rotate fast and stably with strong vibration output, but the battery capacity is limited and power consumption is high, causing the battery to run out soon
Solution Approach 1:
The patent divides the battery system into multiple button cell batteries (typically 3-4 batteries) connected in series, segmenting the total power requirement across multiple smaller battery units. This segmentation allows the system to maintain high vibration output while extending operational duration, as the batteries can be arranged to provide both sufficient voltage for strong vibration and extended capacity through series connection configuration.
2Speed
If the battery outputs full voltage to the vibration motor, then the vibration motor rotates fast and stably, but the power consumption is large, causing premature battery depletion
Solution Approach 1:
The patent employs dynamic voltage regulation through a control circuit that can adjust the voltage output to the vibration motor based on operational requirements. The control circuit dynamically manages power delivery, providing full voltage when strong vibration is needed while reducing power consumption during normal operation, thereby extending battery life while maintaining motor performance when required.
Solution Approach 2:
The patent changes the electrical parameters (voltage and current) supplied to the vibration motor through a power management circuit. By regulating the voltage output from the battery pack and controlling the current flow to the motor, the system can optimize power consumption while maintaining adequate vibration output, thus resolving the contradiction between high speed performance and low power consumption.
3Quantity of substance
If multiple button cell batteries are connected in series to increase capacity, then the battery voltage increases, but the power consumption increases proportionally, still failing to meet long-term working requirements
Solution Approach 1:
The patent introduces a power management circuit as an intermediary between the battery pack and the vibration motor. This intermediary circuit includes voltage regulation and current control components that efficiently manage the power transfer from multiple series-connected batteries to the motor, minimizing energy losses and optimizing power consumption while utilizing the full capacity of the battery assembly.
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 power supply regulation unit effectively reduces power consumption, extending the vibration capsule's operational time while maintaining vibration safety by alternately powering the vibration source with two button cell batteries and regulating voltage through MOSFETs and a DC-DC converter.
Implementation Method 1
A vibration capsule with a power supply regulation unit that alternates power from two button cell batteries to the vibration source using MOSFETs
Implementation Method 2
regulating voltage through MOSFETs and a DC-DC converter
Data Source
AI summary
The present invention provides a vibration capsule and a power supply method thereof. The vibration capsule includes an enclosure, a vibration source disposed within the enclosure and a battery unit electrically connected to the vibration source. The battery unit includes a battery and a power supply regulation unit connected to the circuit of the battery and the vibration source. The vibration capsule regulates the supply voltage of the battery to the vibration source through the power supply regulation unit, so that the battery provides the supply voltage lower than the total voltage of the battery to the vibration source, which can reduce power consumption and provide longer vibration time while ensuring the vibration safety of the vibration capsule.