Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (10): 2447-2455.doi: 10.13229/j.cnki.jdxbgxb20210263

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Local ultrasound array focusing method based on multiarray synthetic aperture

Jian CHEN1(),Fan YU1,Lin LIN1,Ming⁃hui SUN2   

  1. 1.College of Communication Engineering，Jilin University，Changchun 130022，China
    2.College of Computer Science and Technology，Jilin University，Changchun 130012，China
  • Received:2021-03-28 Online:2022-10-01 Published:2022-11-11

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Abstract:

Increasing the size of transducer array can improve the accuracy of focusing， but it also brings the increase of power consumption and focusing noise. To solve this problem， a local ultrasound array focusing method based on multi array synthetic aperture was proposed.The number of focused transducer was determined by proposed method according to the radiation angle of transducer， and power consumption and noise were reduced by reducing the number of transducer working at the same time. The focusing accuracy and power consumption of local array focusing method and full array focusing method are tested. The results show that， compared with the full array focusing method， the focusing accuracy of the proposed method is slightly improved， the focusing intensity is reduced by 5%， but the power consumption is reduced by 31%.

Key words: communication and information system, aerial tactile, ultrasound tactile, ultrasound transducer array

CLC Number: 

  • TN958

Fig.1

Coordinate system of the multi-array focusing"

Fig.2

Block diagram of an ultrasound tactile feedback system"

Fig.3

Schematic diagram of generating driving signal"

Fig.4

Diagram of setting length of shift register"

Fig.5

Structure diagram of mn channel shift register"

Fig.6

Diagram of multi-channel signal delay control"

Fig.7

Four-array ultrasound tactile feedback system"

Fig.8

Experimental settings"

Fig.9

Spatial distribution of the measured sound pressure"

Fig.10

Normalized sound pressure distribution near focus at different modulation frequencies and heights"

Fig.11

System work scene"

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