Fluid Detection Device Using Magnetic Repulsion for Stable Pressure Sensing
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Solution Overview
Problem
Existing fluid detection devices are unstable due to temperature changes and attachment state variations, leading to unreliable pressure detection results.
Innovation Solution
A fluid detection device with a deformable partition wall and a slide tip system, where the slide tip is held by a slide holding part and moves within a fluid chamber and air chamber, using magnets to detect movement and maintain stability through elastic deformation of the container, with stoppers and a circulation mechanism to manage pressure changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure sensing part with piezoelectric element is used to detect fluid pressure, then pressure detection capability is achieved, but the device structure becomes complicated and detection stability deteriorates due to temperature changes and volume variations
Solution Approach 1:
The patent replaces the piezoelectric pressure sensing system with a magnetic field-based detection system. A magnet is attached to the slide tip, and a magnetic sensor detects the magnet's position to determine fluid movement. This substitution eliminates the need for piezoelectric elements and complex pressure sensing circuits, thereby improving reliability while maintaining detection capability.
Solution Approach 2:
The patent introduces a magnet as an intermediary element attached to the slide tip. The magnet interacts with the magnetic sensor to transmit information about fluid movement without requiring direct mechanical or electrical contact between the fluid and the sensing system. This intermediary approach simplifies the overall system structure and improves detection stability.
2Measurement precision
If a piezoelectric element is used to detect pressure changes, then pressure sensing function is achieved, but the device complexity increases due to additional circuit components
Solution Approach 1:
The patent replaces the piezoelectric pressure sensing system with a magnetic field-based detection system. A magnet is attached to the slide tip, and a magnetic sensor detects the magnet's position to determine fluid movement. This substitution eliminates the need for piezoelectric elements and complex pressure sensing circuits, thereby improving reliability while maintaining detection capability.
3Measurement precision
If the detection device uses piezoelectric elements and pressure sensing circuits, then pressure detection is enabled, but operation stability deteriorates due to temperature and attachment state variations
Solution Approach 1:
The patent replaces the piezoelectric pressure sensing system with a magnetic field-based detection system. A magnet is attached to the slide tip, and a magnetic sensor detects the magnet's position to determine fluid movement. This substitution eliminates the need for piezoelectric elements and complex pressure sensing circuits, thereby improving reliability while maintaining detection capability.
Solution Approach 2:
The patent changes the detection parameter from pressure (which is sensitive to temperature and attachment state) to magnetic field position (which is stable under various conditions). By detecting the position of the magnet attached to the slide tip through magnetic field changes, the system achieves stable operation regardless of temperature or attachment state variations.
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 device achieves stable fluid detection regardless of temperature changes or attachment states, maintaining high accuracy even with mixed fluids and reducing pressure changes, allowing for reliable operation and easy adjustment of detection sensitivity.
Implementation Method 1
a first magnet is disposed in the casing to be located at a position along the movement direction of the slide tip, wherein the slide tip includes a second magnet which is provided at a position facing the first magnet and repelling the first magnet
Implementation Method 2
a casing which is connectable to one end of an elastic container filled with a fluid and has a hollow inner part so that the fluid inside the elastic container is able to flow to the hollow inner part
Data Source
AI summary
Embodiments provide a fluid detection device including a casing connectable to a tube filled with water and allows the water to flow to a hollow inner part; a partition wall deformable so that the hollow inner part is divided into a fluid chamber filled with the water and an air chamber opened to the atmosphere; a slide tip disposed inside the fluid chamber; and a tip sensor disposed outside the casing. According to at least one embodiment, a slide holding part which holds the slide tip slidably forward and backward is formed inside the fluid chamber, an opening part is formed in the air chamber, a magnet is disposed in the casing, the slide tip includes a magnet provided at a position facing the magnet and repelling the magnet.