Multi-array-element ultrasonic sound source three-dimensional imaging method and system based on synthetic aperture
A synthetic aperture and three-dimensional imaging technology, which is applied to radio wave measurement systems, measurement devices, instruments, etc., can solve the problems of increasing the number of array elements, increasing economic costs, and increasing computational complexity, and achieves the effect of simple operation and low cost
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Embodiment 1
[0049] refer to figure 1 , figure 2 , image 3 As shown, this embodiment provides a method for three-dimensional imaging of multi-element ultrasonic sound sources based on synthetic aperture, including steps:
[0050] S1. Using the first preset distance as a step, calibrate a plurality of virtual planes parallel to the microphone array;
[0051] S2. Select one of the virtual planes, and the microphone array imager moves a second preset distance on the virtual plane according to a preset track;
[0052] S3. Forming multiple beams based on the sound source signals received by the microphone array imager at multiple positions during the movement;
[0053] S4. Perform sound source imaging based on the formed multiple beams, and record the maximum value of the imaginary plane imaging thermodynamic map;
[0054] S5. Steps S2-S4 are repeated until the maximum value records of all imaginary plane imaging thermodynamic maps are completed;
[0055] S6. Comparing the maximum values...
Embodiment 2
[0089] refer to Figure 7 As shown, this embodiment provides a synthetic aperture-based multi-element ultrasonic sound source three-dimensional imaging system. Based on the imaging method described in Embodiment 1, it includes a microphone array imager and a virtual plane calibration module. The microphone array imager includes sequentially connected A microphone array, a beamforming module, an imaging module, a comparison module and a display module, and the virtual plane calibration module is connected to the microphone array;
[0090] The virtual plane calibration module is used to construct a plurality of virtual planes parallel to the microphone array with the first preset distance as the step size;
[0091] The microphone array is used to move a second preset distance on each virtual plane according to a preset trajectory, and receive sound source signals during the movement process;
[0092] A beam forming module, configured to form multiple beams corresponding to each...
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