Acoustic Imaging with Electronic Circuits |
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Page 47
... input terminals 0 , ... , 15 with the voltages A , ... , P. The terminals 0 , 8 , 4 , 12 with the voltages A , I , E , M are connected to the amplifier on top left , and the sum − ( A + I + E + M ) is produced at the output terminal 16 ...
... input terminals 0 , ... , 15 with the voltages A , ... , P. The terminals 0 , 8 , 4 , 12 with the voltages A , I , E , M are connected to the amplifier on top left , and the sum − ( A + I + E + M ) is produced at the output terminal 16 ...
Page 49
... input voltages A , ... , F to the input terminals 0 , 1 , ... , 31. The respective summing circuits are shown on the left in Fig . 3.2-3 . Deviating from the presentation of the circuit in Fig . 3.1-3 , we do not show the voltages A , B ...
... input voltages A , ... , F to the input terminals 0 , 1 , ... , 31. The respective summing circuits are shown on the left in Fig . 3.2-3 . Deviating from the presentation of the circuit in Fig . 3.1-3 , we do not show the voltages A , B ...
Page 134
... input terminals denoted m = 0 , 1 , ... , 15 and the output terminals j = −8 , −7 , ... , +7 . This notation is also shown in Fig . 3.4-2 . The output voltages of the second stack of cards in Fig . 5.2-1 are denoted F ( 1 , j ) sin ...
... input terminals denoted m = 0 , 1 , ... , 15 and the output terminals j = −8 , −7 , ... , +7 . This notation is also shown in Fig . 3.4-2 . The output voltages of the second stack of cards in Fig . 5.2-1 are denoted F ( 1 , j ) sin ...
Contents
Introduction | 1 |
Image Generation by Linear Transformations | 18 |
Implementation of the Fourier Transform | 41 |
Copyright | |
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16 hydrophones A₁ according to Eq according to Fig acoustic imaging amplitude analog circuits analog-to-digital converter Ax₁ bandwidth beam forming cartesian coordinates circuit of Fig d₁₁ delay circuits denoted diffraction pattern digital circuits electronic circuits equal equipment fast Fourier transform filters four voltages Fourier series Fourier transform circuit Hence Hologr holography hydrophone array implementation input terminals input voltages insonification inverse transform light-emitting diode linear microphones multipliers object plane obtain operational amplifiers optical output terminals output voltages printed circuit cards processing produce projector pulse q 0 q radiation ratio reception plane resistors resolution resolvable points scattering points sensors shift register shown in Fig shows sidelobe signal signal-to-noise ratio sinusoidal function sinusoidal waves sonar sound waves spread spectrum ẞx switches synthetic aperture t₁ Table target two-dimensional ultrasonic values wavefront wavelength x₁ zero