Enhanced detection through parsing records into signal components
First Claim
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1. A method to enhance detection of particles, comprising:
- a) receiving a time varying signal generated from a light scattered from one or more particles that forms an interference fringe pattern, wherein the time varying signal is a contiguous signal;
b) partitioning the time varying signal into a plurality of timing segments comprising a first timing segment and a second timing segment;
c) determining a plurality of parameters from the plurality of timing segments, wherein the plurality of parameters comprise at least one of a frequency and a phase;
d) determining a change in the at least one of the frequency and the phase between the first timing segment and the second timing segment;
e) identifying the first timing segment and the second timing segment as being associated with a single particle, when the change is not greater than a threshold;
f) identifying the first timing segment as a first individual particle signal component produced by a first particle and identifying the second timing segment as a second individual particle signal component produced by a second particle, when the change in the at least one of the frequency and the phase is greater than the threshold when a sample volume has a plurality of particles including the first particle and the second particle within a time duration to mitigate at least one of a particle size measurement error and a particle velocity measurement error and a false counting of particles under coincident events; and
g) adjusting the plurality of timing segments, wherein the partitioning and determining operations are repeated iteratively for the adjusted segments until at least the first individual particle signal component and the second individual particle signal component are identified, wherein operations a), b), c), d), e), f), and g) are performed by a processor.
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Abstract
Methods and apparatuses to detect particles in dense particle fields are described. A time varying signal is partitioned into a plurality of segments. Parameters are determined from the segments. The time varying signal is parsed into a plurality of individual particle signal components based on the plurality of parameters.
8 Citations
37 Claims
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1. A method to enhance detection of particles, comprising:
a) receiving a time varying signal generated from a light scattered from one or more particles that forms an interference fringe pattern, wherein the time varying signal is a contiguous signal; b) partitioning the time varying signal into a plurality of timing segments comprising a first timing segment and a second timing segment; c) determining a plurality of parameters from the plurality of timing segments, wherein the plurality of parameters comprise at least one of a frequency and a phase; d) determining a change in the at least one of the frequency and the phase between the first timing segment and the second timing segment; e) identifying the first timing segment and the second timing segment as being associated with a single particle, when the change is not greater than a threshold; f) identifying the first timing segment as a first individual particle signal component produced by a first particle and identifying the second timing segment as a second individual particle signal component produced by a second particle, when the change in the at least one of the frequency and the phase is greater than the threshold when a sample volume has a plurality of particles including the first particle and the second particle within a time duration to mitigate at least one of a particle size measurement error and a particle velocity measurement error and a false counting of particles under coincident events; and g) adjusting the plurality of timing segments, wherein the partitioning and determining operations are repeated iteratively for the adjusted segments until at least the first individual particle signal component and the second individual particle signal component are identified, wherein operations a), b), c), d), e), f), and g) are performed by a processor. - View Dependent Claims (2, 3, 4, 5)
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6. A method to mitigate particle measurement errors in a dense particle field, comprising:
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a) receiving a time varying signal generated from a light scattered from one or more particles that forms an interference fringe pattern, wherein the time varying signal is a contiguous signal; b) partitioning the time varying signal into a plurality of timing segments comprising a first timing segment and a second timing segment; c) locating peak amplitudes in the plurality of timing segments; d) determining a change in at least one of parameters comprising a frequency and a phase between the first timing segment and the second timing segment; e) identifying the first timing segment and the second timing segment as being associated with a single particle, when the change is not greater than a threshold; f) identifying the first timing segment as a first individual particle signal component produced by a first particle and identifying the second timing segment as a second individual particle signal component produced by a second particle, when the change in the at least one of the frequency and the phase is greater than the threshold when a sample volume has a plurality of particles including the first particle and the second particle within a time duration to mitigate at least one of a particle size measurement error and a particle velocity measurement error and a false counting of particles under coincident event; and g) determining an estimated particle transit time, wherein at least the first individual particle signal component and the second individual particle signal component are identified based on the estimated transit time wherein operations a, b, c, d, e, f, and g are performed by a processor. - View Dependent Claims (7, 8, 9)
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10. A method to mitigate particle measurement errors in a dense particle field, comprising:
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a) receiving a time varying signal generated from a light scattered from one or more particles that forms an interference fringe pattern, wherein the time varying signal is a continuous signal; b) partitioning the time varying signal into a plurality of timing segments comprising a first timing segment and a second timing segment; c) locating peak amplitudes in the plurality of timing segments; d) determining a change in at least one of parameters comprising a frequency and a phase between the first timing segment and the second timing segment; e) identifying the first timing segment and the second timing segment as being associated with a single particle, when the change is not greater than a threshold; f) identifying the first timing segment as a first individual particle signal component produced by a first particle and identifying the second timing segment as a second individual particle signal component produced by a second particle, when the change in the at least one of the frequency and the phase is greater than the threshold when a sample volume has a plurality of particles including the first particle and the second particle within a time duration to mitigate at least one of a particle size measurement error and a particle velocity measurement error and a false counting of particles under coincident events; and g) determining a duration of the time varying signal, wherein at least the first individual particle signal component and the second individual particle signal component are identified based on the duration wherein operations a, b, c, d, e, f, and g are performed by a processor.
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11. A method to mitigate particle measurement errors in a dense particle field, comprising:
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a) receiving a time varying signal generated from a light scattered from one or more particles that forms an interference fringe pattern, wherein the time varying signal is a contiguous signal; b) partitioning the time varying signal into a plurality of timing segments comprising a first timing segment and a second timing segment; c) locating peak amplitudes in the plurality of timing segments; d) determining a change in at least one of parameters comprising a frequency and a phase between the first timing segment and the second timing segment; e) identifying the first timing segment and the second timing segment as being associated with a single particle, when the change is not greater than a threshold; f) identifying the first timing segment as a first individual particle signal component produced by a first particle and identifying the second timing segment as a second individual particle signal component produced by a second particle, when the change in the at least one of the frequency and the phase is greater than the threshold when a sample volume has a plurality of particles including the first particle and the second particle within a time duration to mitigate at least one of a particle size measurement error and a particle velocity measurement error and a false counting of particles under coincident events; and g) adjusting a duration of the plurality of timing segments based on the peak amplitudes, wherein operations b, c and d are repeated iteratively for the adjusted timing segments until at least the first individual particle signal component and the second individual particle signal component are identified, wherein operations a, b, c, d, e, f, and g are performed by a processor.
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12. A non-transitory machine-readable medium storing data to cause a data processing system to perform a method to enhance detection of particles comprising:
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a) receiving a time varying signal generated from a light scattered from one or more particles that forms an interference fringe pattern, wherein the time varying signal is a contiguous signal; b) partitioning the time varying signal into a plurality of timing segments comprising a first timing segment and a second timing segment; c) determining a plurality of parameters from the plurality of timing segments, wherein the plurality of parameters comprise at least one of a frequency, and a phase; d) determining a change in the at least one of the frequency and the phase between the first timing segment and the second timing segment; e) identifying the first timing segment and the second timing segment as being associated with a single particle, when the change is not greater than a threshold; and f) identifying the first timing segment as a first individual particle signal component produced by a first particle and identifying the second timing segment as a second individual particle signal component produced by a second particle, when the change in the at least one of the frequency and the phase is greater than the threshold when a sample volume has a plurality of particles including the first particle and the second particle within a time duration to mitigate at least one of a particle size measurement error and a particle velocity measurement error and a false counting of particles under coincident events. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A non-transitory machine-readable medium storing data to cause a data processing system to perform a method to mitigate particle measurement errors in a dense particle field, comprising:
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a) receiving a time varying signal generated from a light scattered from one or more particles that forms an interference fringe pattern, wherein the time varying signal is a contiguous signal; b) partitioning the time varying signal into a plurality of timing segments comprising a first timing segment and a second timing segment; c) locating peak amplitudes in the plurality of timing segments; d) determining a change in at least one of parameters comprising a frequency and a phase between the first timing segment and the second timing segment; e) identifying the first timing segment and the second timing segment as being associated with a single particle, when the change is not greater than a threshold; and f) identifying the first timing segment as a first individual particle signal component produced by a first particle and identifying the second timing segment as a second individual particle signal component produced by a second particle, when the change in the at least one of the frequency and the phase is greater than the threshold when a sample volume has a plurality of particles including the first particle and the second particle within a time duration to mitigate at least one of a particle size measurement error and a particle velocity measurement error and a false counting of particles under coincident events, wherein operations a, b, c, d, e, and f are performed by a processor. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. An apparatus to enhance detection of particles, comprising:
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a memory, and a processor coupled to the memory, wherein the processor is to a) receive a time varying signal generated from a light scattered from one or more particles that forms an interference fringe pattern, wherein the time varying signal is a contiguous signal;
the processor is to b) partition the time varying signal into a plurality of timing segments comprising a first timing segment and a second timing segment, the processor is to c) determine a plurality of parameters from the plurality of timing segments, wherein the plurality of parameters comprise at least one of a frequency and a phase;
the processor is to d) determine a change in at least one of the frequency and the phase between the first timing segment and the second timing segment;
the processor is to e) identify the first timing segment and the second timing segment as being associated with a single particle, when the change is not greater than a threshold; and
the processor is to f) identifying the first timing segment as a first individual particle signal component produced by a first particle and identifying the second timing segment as a second individual particle signal component produced by a second particle, when the change in the at least one of the frequency and the phase is greater than the threshold when a sample volume has a plurality of particles including the first particle and the second particle within a time duration to mitigate at least one of a particle size measurement error and a particle velocity measurement error and a false counting of particles under coincident events. - View Dependent Claims (26, 27, 28, 29, 30)
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31. An apparatus to mitigate particle measurement errors in a dense particle field, comprising:
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a memory; and a processor coupled to the memory, wherein the processor is to a) receive a time varying signal generated from a light scattered from one or more particles that forms an interference fringe pattern, wherein the time varying signal is a contiguous signal, the processor is to b) partition the time varying signal into a plurality of timing segments comprising a first timing segment and a second timing segment;
wherein the processor is toc) locate peak amplitudes in the plurality of timing segments;
wherein the processor is tod) determine a change in at least one of parameters comprising a frequency and a phase between the first timing segment and the second timing segment;
wherein the processor is toe) identify the first timing segment and the second timing segment as being associated with a single particle, when the change is not greater than a threshold; and
wherein the processor is tof) identify the first timing segment as a first individual particle signal component produced by a first particle and identifying the second timing segment as a second individual particle signal component produced by a second particle, when the change in the at least one of the frequency and the phase is greater than the threshold when a sample volume has a plurality of particles including the first particle and the second particle within a time duration to mitigate at least one of a particle size measurement error and a particle velocity measurement error and a false counting of particles under coincident events. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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Specification