Flow Rate-Velocity Calculator Power Spectrum Correction
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Solution Overview
Problem
Existing flow rate-velocity sensor devices struggle to accurately differentiate between high and low flow rates using a reference frequency, leading to inaccurate flow rate determination.
Innovation Solution
A flow rate-velocity calculator with a receiver, correction unit, and arithmetic unit that receives and corrects a first power spectrum to calculate a second power spectrum, enabling accurate calculation of flow rate or velocity by extrapolating frequencies beyond the reference frequency, and a sensor device with a light emitter and receiver shielded by a transparent substrate to improve measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a reference frequency is used to measure flow rate, then the measurement process is simple, but the accuracy of differentiating between high and low flow rates deteriorates
Solution Approach 1:
The patent applies preliminary action by performing power spectrum correction before flow rate calculation. The correction unit pre-processes the power spectrum data to extrapolate frequencies beyond the reference frequency, preparing corrected data that enables accurate differentiation between high and low flow rates while maintaining the simplicity of the reference frequency measurement approach
Solution Approach 2:
The patent changes the parameter representation by transforming the power spectrum from uncorrected to corrected state. The correction unit modifies the frequency parameters through extrapolation, creating a corrected power spectrum that preserves the simplicity of reference frequency measurement while enabling accurate flow rate differentiation across different flow conditions
2Measurement precision
If the power spectrum is corrected to extrapolate frequencies beyond reference frequency, then the flow rate calculation accuracy is improved, but the computational complexity increases
Solution Approach 1:
The correction unit performs preliminary power spectrum correction by extrapolating frequencies beyond the reference frequency using the relationship between frequency and flow rate. This pre-processing step prepares the data for accurate flow rate calculation while maintaining a relatively simple computational approach based on established physical relationships
Solution Approach 2:
The correction unit uses feedback from the measured power spectrum at the reference frequency to extrapolate and correct the full power spectrum. By using the measured reference frequency data as feedback to generate corrected frequencies across the flow rate range, the system achieves high accuracy without requiring complex computational models
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 the accuracy of flow rate and velocity calculations by correcting the power spectrum, effectively distinguishing between high and low flow rates, thereby improving measurement precision.
Implementation Method 1
Measurement of blood flow uses, for example, the Doppler effect of light. When blood is illuminated with light, the light is scattered by blood cells, such as red blood cells. The frequency of the illuminating light and the frequency of the scattered light are used to calculate the traveling speed of the blood cells.
Data Source
AI summary
A flow rate-velocity sensor device includes a package including a light receiver and a light emitter, a transparent substrate including a light shield, and a flow rate-velocity calculator. The flow rate-velocity calculator includes a receiver, a correction unit, an arithmetic unit, and a transmitter. The receiver receives data on a first power spectrum. The correction unit corrects the data received by the receiver to calculate a second power spectrum. The arithmetic unit calculates at least one of a flow rate or a flow velocity from the second power spectrum calculated by the correction unit. The transmitter transmits, to an external unit, at least one of the flow rate or the flow velocity calculated by the arithmetic unit.