Electromagnetic Pulse Telemetry for Radial Velocity Deconvolution
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Solution Overview
Problem
Existing electromagnetic radiation pulse detection and telemetry systems face challenges in achieving high spatial resolution and accurate radial velocity measurements for fluid flows due to the continuous distribution and varying radial velocities of backscattering targets, leading to limited spatial resolution of C·τ/2 and C·τ, and requiring extensive calculations for radial velocity estimation.
Innovation Solution
A process and system that utilize electromagnetic radiation pulses to characterize radial velocity distribution by emitting pulses, detecting backscattered signals, and applying an impulse response to decompose the measurement signal into pairs of backscattering amplitude and radial velocity values, considering the system's emission, propagation, and detection features, allowing for simultaneous contributions from spatial slices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the laminated model method is used to calculate backscattered radiation intensity for each spatial slice, then the measurement process is simplified, but the spatial resolution is limited to C·τ/2
Solution Approach 1:
The patent applies segmentation by dividing the continuous measurement signal into discrete contributions from different spatial slices. Each spatial slice corresponds to a specific range gate in the pulse duration, allowing the total backscattered signal to be decomposed into spatially-resolved components. This enables spatial resolution finer than the traditional C·τ/2 limit by analyzing contributions from different time intervals within the pulse envelope.
2Ease of operation
If the time window duration is set equal to the emitted laser pulse duration to analyze backscattered radiation frequency, then the measurement is straightforward, but the spatial resolution is limited to C·τ
Solution Approach 1:
The patent applies partial action by using time windows that are shorter than the full pulse duration for spatial resolution measurements. Instead of analyzing the entire pulse, the method uses partial time intervals (range gates) to resolve spatial information, achieving C·δt resolution where δt < τ. This partial analysis of the pulse duration enables finer spatial resolution while maintaining operational simplicity.
3Measurement precision
If contributions from all spatial slices are considered for all measurements to achieve spatial resolution better than C·τ, then the spatial resolution improves, but the calculation complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the impulse response characteristics for each spatial slice before performing the actual measurement decomposition. The system prepares lookup tables or pre-computed response functions that describe how each spatial slice contributes to the total signal, which are then used during measurement to rapidly decompose the signal without performing complex real-time calculations. This pre-computation significantly reduces the computational burden during actual measurements.
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
This approach enhances spatial resolution and reduces calculation complexity by using an impulse response to deconvolve the measurement signal, providing accurate radial velocity and backscattering amplitude distributions for fluid flows, suitable for applications like meteorological measurements and anemometric measurements.
Implementation Method 1
detecting a portion of the at least one radiation pulse which was backscattered by at least one target present in the exploration zone
Implementation Method 2
the information on the radial velocity of each target corresponding to a frequency shift due to the Doppler effect which occurs when the radiation is backscattered by this target
Data Source
AI summary
A process and system for detection and telemetry using electromagnetic radiation pulses allows characterization of a radial velocity distribution as a function of a separation distance within an exploration zone. An impulse response from the system is used for decomposing a measurement signal which is collected for each acquisition sequence performed for a useful measurement. The result of the decomposition includes an estimate of the radial velocity distribution as a function of the separation distance.