Transducer Array Calculation (TAC) GUI
by
Benedikt Kohout
15 Mar 2012
(Updated
12 Sep 2012)
GUI to calculate and visualize the radiation pattern of ultrasound transducers.

T_A_C_global_variables_GUI(reset)

%% TRANSDUCER ARRAY CALCULATION (T_A_C)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% This program was developed to calculate and visualize the radiation pattern of
% ultrasound transducers, especially for 3D Ultrasound Computer Tomography (USCT).
%
% To run the program properly, it is necessary to include the following
% MATLAB files:
%  T_A_C_GUI.m [= creating GUI and administrating]
%  T_A_C_GUI.fig [= GUI figure]
%  calculate_pattern_acoustic_GUI.m [= calculation of 3D radiation pattern]
%  calculate_transducer_array_2D_acoustic.m [= calculation of 2D radiation pattern and 3 dB range]
%  T_A_C_global_variables_GUI.m [= init global variables]
%  visualize_transducer_array_GUI.m [= visualization of transducer surfaces]
%  Soundfield_without_approx.m [= calculation of Near Field]
%  calculate_half_power_Beamwidth.m [= calculation of half power beamwidth]
%
% The TAC Package also includes an "Icons" and "Examples" folder.
%
% Developed by Benedikt Kohout and Luciano.G. Palacios Folla, friendly supported by Robin Dapp
% at the Karlsruhe Institute of Technology, Institute for Data Processing and Electronics, Karlsruhe, Germany.
% benedikt.kohout@kit.edu
% 03/2012
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
function T_A_C_global_variables_GUI(reset)
if nargin == 0;
reset = 0;
end
%constants
global c f fs B lambda;
global n_x n_y d_arrspa_x d_arrspa_y Phas_0_x Phas_0_y;
global d_padim_x d_padim_y;
global res_2D;
% global theta_min theta_max;
global hwb_ref;
global pulse_width;
global cancel_button;
global impedance;
global u_0;
global var1;
global var2;
global z_end;
global y_end;
global x_end;
global x_trans_dist_steps;
global y_trans_dist_steps;
global fft_points;
global fft_rect_points;
global FREC TIME AMPL PHAS POW;
hwb_ref = true;
if reset == 1
c = 1500;
f = 3.0E6;
B = 1.5E6;
fs = 2.5E8;
%res=pi/50;%0.1
res_2D=pi/1000;
%res_2D=pi/10000;
% theta_min = 0;
% theta_max = 2*pi;
%substitutions
%omega = 2 .* pi .* f;
lambda = c / f;
%k = 2 .* pi ./ lambda;
%patch parameters
d_padim_x = 300E6; %zdirection [m] z
d_padim_y = 300E6; %ydirection [m] 0 y
%array parameters
n_x = 3;
d_arrspa_x = 500E6;% [m] Distance middle of element to middle of element (element/2 + distance + element/2)
Phas_0_x = 0; %[rad]
n_y = 3;
d_arrspa_y = 500E6;% [m] Distance middle of element to middle of element (element/2 + distance + element/2)
Phas_0_y = 0; %[rad]
fft_points = 200;
fft_rect_points = 400;
pulse_width = 200;
cancel_button = 0;
impedance = 1500000; % Ohm
u_0 = 1;
var1 = 100;
var2 = 100;
z_end = 0.015; % m
y_end = 0; % m
x_end = 0.005; % m
x_trans_dist_steps = 20;
y_trans_dist_steps = 20;
FREC = 1;
TIME = 1;
AMPL = 2;
PHAS = 3;
POW = 4;
end
end


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