Biomagnetism Sensor Array with Movable Rails
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Solution Overview
Problem
Conventional biomagnetism measuring devices using MR sensors face challenges in detecting biomagnetism due to reduced contact between sensors and the subject, especially when the subject's body shape differs from humans, requiring optimal sensor positioning that is difficult to achieve with fixed MR sensors.
Innovation Solution
A biomagnetism measuring device with removably or movably held magnetic sensors, arranged in an array of frames or rails, allowing for optimal positioning according to the subject, and made of nonmagnetic or flexible materials to minimize environmental magnetism interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If MR sensors are fixed in place in an array, then the device structure is simplified and easier to manufacture, but the sensors cannot be positioned optimally for different body shapes and measurement sites
Solution Approach 1:
The sensor array is divided into multiple independent sensor units that can be separately positioned and adjusted. Each sensor can be independently moved to optimal locations on the holding member, allowing customization for different body shapes and measurement sites while maintaining a relatively simple overall structure
Solution Approach 2:
The holding member incorporates movable structures such as rails, sliders, or adjustable mounting mechanisms that allow sensors to be dynamically repositioned. This dynamic positioning capability enables the same device to adapt to various body shapes and measurement requirements without requiring complete redesign
2Measurement precision
If SQUID sensors are used for high-precision biomagnetism detection, then measurement precision is improved, but the sensors require cooling with refrigerant in a dewar making them difficult to position close to the body
Solution Approach 1:
The patent uses MR sensors that operate at room temperature instead of expensive SQUID sensors requiring liquid helium cooling. While MR sensors have lower intrinsic sensitivity, their room-temperature operation eliminates the need for heavy dewars and complex cooling systems, making them easier to position close to the body and more practical for routine measurements
Solution Approach 2:
The invention changes the operating temperature parameter of the magnetic sensors from cryogenic (SQUID) to room temperature (MR sensors). This parameter change fundamentally alters the system's operational characteristics, eliminating cooling requirements and enabling closer positioning to the body despite slightly reduced sensitivity
3Measurement precision
If multiple SQUID sensors are arranged in a dewar, then high-precision measurement is achieved, but the sensors cannot be easily replaced or repositioned due to electromagnetic interference constraints
Solution Approach 1:
Each MR sensor is an independent, modular unit that can be individually removed and replaced without affecting other sensors. The holding member provides separate mounting positions for each sensor, allowing easy maintenance and reconfiguration without the electromagnetic interference constraints that limit SQUID sensor arrangements
Solution Approach 2:
The holding member is designed with universal mounting structures that can accommodate different sensor types and configurations. Sensors can be easily installed, removed, and repositioned according to different measurement requirements, providing versatility for various body shapes and measurement sites
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
Enables accurate biomagnetic information acquisition by allowing sensors to be positioned optimally, improving contact and reducing unnecessary sensor usage, thus enhancing measurement precision and cost-effectiveness.
Implementation Method 1
there is conventionally known a magneto resistive (MR) sensor which uses a magneto resistive element (MR element). DC resistance acting on the MR element fluctuates according to the strength of the magnetic field.
Implementation Method 2
A SQUID sensor is a magnetic sensor that uses the phenomenon of superconductivity and has a Josephson junction.
Data Source
AI summary
The objective of the present invention is to provide a biomagnetism measuring device with which it is possible for a magnetic sensor to be disposed in an optimal position in accordance with an object being measured. A biomagnetism measuring device (1) according to the present invention is provided with: a plurality of magnetic sensors (11) which detect biomagnetism; and a holding portion (12) in which are formed frames (13) which detachably hold the plurality of magnetic sensors (11) in such a way as to face a living body. Further, the biomagnetism measuring device (1) according to the present invention is provided with: a plurality of magnetic sensors (11) which detect biomagnetism; and a holding portion (12) in which are formed rails (16) which movably hold the plurality of magnetic sensors (11) in such a way as to face a living body.