Methods, systems, and storage mediums for flow velocity detection

A system for flow velocity detection, comprising:

• at least one storage medium storing a set of instructions;
• at least one processor in communication with the at least one storage medium, when executing the stored set of instructions, the at least one processor causes the system to:
• obtain image data;
• determine, based on the image data, a parameter of at least one detection point, the parameter being related to a phase change, the parameter related to the phase change including a phase change rate, wherein the determining, based on the image data, a parameter of at least one detection point includes:
• determining, in the image data, at least two frames of image data segments that are adjacent with respect to time and received by each group of array elements of a scanning probe;
• and
• determining the phase change rate of the at least one detection point corresponding to the each group of array elements based on the at least two frames of image data segments that are adjacent with respect to time;
• and
• determine a first flow velocity of the at least one detection point based on the parameter related to the phase change and a location relationship among the at least one detection point, at least one transmission point, and a plurality of receiving points;
• wherein the method further comprises:
• grouping the array elements of the scanning probe to obtain a plurality of groups of array elements, wherein the each group of array elements of the plurality of groups of array elements includes one or more array elements;
• wherein
• the image data includes a plurality of groups of image data,
• each group of image data of the plurality of groups of image data corresponds to a group of array elements of the plurality of groups of array elements, and
• the each group of image data is obtained by performing demodulation and beam synthesis on reflected signals received by the corresponding group of array elements;
• wherein the determining a first flow velocity of the at least one detection point based on the parameter related to the phase change and a location relationship among the at least one detection point, at least one transmission point, and a plurality of receiving points includes:
• calculating a characteristic matrix for the each group of array elements of the plurality of groups of array elements, based on the parameter related to the phase change and the location relationship among the at least one detection point, the at least one transmission point, and the plurality of receiving points;
• and
• integrating calculation results of the plurality of groups of array elements to obtain the first flow velocity of the at least one detection point.

A non-transitory computer readable medium including executable instructions, the instructions, when executed by at least one processor, causing the at least one processor to effectuate a method comprising:

• obtaining image data;
• determining, based on the image data, a parameter of at least one detection point, the parameter being related to a phase change, the parameter related to the phase change including a phase change rate, wherein the determining, based on the image data, a parameter of at least one detection point includes:
• determining, in the image data, at least two frames of image data segments that are adjacent with respect to time and received by each group of array elements of a scanning probe;
• and
• determining the phase change rate of the at least one detection point corresponding to the each group of array elements based on the at least two frames of image data segments that are adjacent with respect to time;
• and
• determining a first flow velocity of the at least one detection point based on the parameter related to the phase change and a location relationship among the at least one detection point, at least one transmission point, and a plurality of receiving points;
• wherein the method further comprises:
• grouping the array elements of the scanning probe to obtain a plurality of groups of array elements, wherein the each group of array elements of the plurality of groups of array elements includes one or more array elements;
• wherein
• the image data includes a plurality of groups of image data,
• each group of image data of the plurality of groups of image data corresponds to a group of array elements of the plurality of groups of array elements, and
• the each group of image data is obtained by performing demodulation and beam synthesis on reflected signals received by the corresponding group of array elements
• wherein the determining a first flow velocity of the at least one detection point based on the parameter related to the phase change and a location relationship among the at least one detection point, at least one transmission point, and a plurality of receiving points includes:
• determining a resultant spatial displacement vector corresponding to the each group of array elements based on the location relationship among the at least one detection point, the at least one transmission point, and the plurality of receiving points;
• determining a first characteristic matrix corresponding to the each group of array elements based on the resultant spatial displacement vector corresponding to the each group of array elements;
• and
• determining the first flow velocity of the at least one detection point based on the phase change rate of the at least one detection point corresponding to the each group of array elements and the first characteristic matrix corresponding to the each group of array elements.