Vital Sensor Power Supply with Shielded Capacitor for MRI Environments
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Solution Overview
Problem
Existing power supply devices for vital sensors lack enhanced convenience and electromagnetic wave shielding, particularly in environments with strong electromagnetic noise like MRI examinations.
Innovation Solution
A power supply device with a capacitor connected to a power supply circuit and a shield case that covers both components, providing electromagnetic wave shielding and allowing permanent accommodation within a sealed configuration, eliminating the need for battery replacement due to the capacitor's less degraded power storage performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rechargeable battery is used in the power supply device, then the device can be detached and replaced, but the electromagnetic wave shielding is compromised and the battery degrades with charging/discharging cycles
Solution Approach 1:
The power supply device is divided into separable components: a detachable battery unit and a sensor housing. This allows the battery to be replaced independently while maintaining the electromagnetic shielding integrity of the sensor housing, resolving the contradiction between ease of operation and electromagnetic wave protection.
Solution Approach 2:
A connector serves as an intermediary component between the battery and sensor housing, enabling electrical connection and detachment while preserving the electromagnetic shielding structure. The connector allows power transmission without compromising the shielding effectiveness.
2Ease of operation
If a rechargeable battery is used, then the device can be replaced, but frequent replacement is needed due to degradation from charging/discharging
Solution Approach 1:
The invention employs a disposable or replaceable battery unit that can be easily exchanged when depleted. This approach accepts the limited lifespan of the battery as a trade-off for maintaining high reliability of the overall system, as the battery is a low-cost component compared to the vital sensor.
Solution Approach 2:
The battery is designed to be discarded after use or when degraded, and can be recovered/recycled. This principle addresses the reliability issue by acknowledging that the battery will degrade and needs replacement, but the overall system reliability is maintained through easy replacement procedures.
3Adaptability or versatility
If electromagnetic wave shielding is enhanced for MRI environments, then the sensor can be used in noisy conditions, but the device complexity increases
Solution Approach 1:
The electromagnetic shielding function is merged with the sensor housing structure itself, rather than being a separate additive component. The housing is designed to provide shielding while maintaining a relatively simple overall device structure, balancing adaptability for MRI environments with structural 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
The solution enhances convenience by ensuring reliable operation in environments with strong electromagnetic noise and reduces the need for frequent replacements, as the capacitor's performance is less affected by charging and discharging, allowing for improved shielding and extended use in noisy conditions.
Implementation Method 1
a shield case covering at least the power supply circuit and the capacitor to shield an electromagnetic wave
Implementation Method 2
a capacitor electrically connected to the power supply circuit
Data Source
AI summary
A power supply device includes: a power supply circuit configured to supply power to a vital sensor; a capacitor electrically connected to the power supply circuit; a connector configured to supply power for charging the capacitor; and a shield case covering at least the power supply circuit and the capacitor to shield an electromagnetic wave.