Flow Velocity Measurement in Non-Spherical Solid-Liquid Mixtures
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Solution Overview
Problem
Existing laser blood flowmeters are complex in configuration and cannot effectively determine the flow velocity of liquid mixtures containing non-spherical solids and liquids.
Innovation Solution
A flow velocity determining apparatus that includes an irradiating unit, a detecting unit, and a determining unit, which uses reflected light to determine the flow velocity of a liquid mixture containing non-spherical solids and liquids by analyzing the light amount detected by the detecting unit, disposed on both sides of the optical axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a laser blood flowmeter sequentially calculates blood flow velocity in three orthogonal directions using multiple laser beams and photoelectric sensors, then the blood flow velocity and direction can be determined, but the device configuration becomes complex
Solution Approach 1:
The invention extracts only the essential function of measuring flow velocity by using a single laser beam and single photoelectric sensor, eliminating the need for multiple laser beams and complex sequential calculations in three orthogonal directions. The detecting unit is positioned to detect reflected light at a specific angle, simplifying the overall device configuration while maintaining measurement capability.
Solution Approach 2:
The single photoelectric sensor in the invention serves multiple functions: it detects the reflected light intensity, determines flow velocity magnitude, and can infer flow direction through the angular position of the sensor relative to the laser beam. This multi-functionality replaces the need for separate measurement systems for each directional component.
2Adaptability or versatility
If traditional laser blood flowmeters are used, then blood flow can be measured, but they cannot effectively determine flow velocity of liquid mixtures containing non-spherical solids
Solution Approach 1:
The invention changes the measurement parameter from directional velocity components (requiring multiple beams) to reflected light intensity at a specific angle. This parameter change allows the system to effectively measure flow velocity in liquid mixtures containing non-spherical solids, as the light scattering characteristics provide direct information about the flow state without requiring complex multi-directional analysis.
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 the determination of flow velocity with a simple configuration, capable of handling liquid mixtures with non-spherical solids, such as blood, by analyzing the light scattering patterns.
Implementation Method 1
a detecting unit that detects reflected light emitted by the irradiating unit and reflected by the liquid mixture flowing through the flow path
Implementation Method 2
analyzing the light scattering patterns
Data Source
AI summary
A flow velocity determining apparatus (10) includes an irradiating unit (20) that emits irradiation light (L1) toward a liquid mixture (BL) which contains a non-spherical solid (BC) and a liquid (BP) and flows through a flow path (TB), a detecting unit (30) that detects reflected light (L2) emitted by the irradiating unit (20) and reflected by the liquid mixture (BL) flowing through the flow path (TB), the detecting unit (32) being disposed on at least one side of an optical axis (L2A) of the reflected light (L2) when seen in a plan view of an imaginary plane including an optical axis (L1A) of the irradiation light (L1) and the optical axis (L2A) of the reflected light (L2), and a determining unit (40) that determines a flow velocity of the liquid mixture (BL) by using a light amount of the reflected light (L2) detected by the detecting unit (32).