%{ The function \"phaseFinder\" takes two inputs, a temperature and composisiton

Question

%{
The function "phaseFinder" takes two inputs, a temperature and
composisiton of a two part mixture and returns its corresponding location
on the provided phase diagram.

The input temperature is to be non-negative and measured in Celcius. The
input composition of the mixture is to be the percentage of Component B,
within the two part (A + B) mixture.
(e.g For a mixture of 25% material A and 75% material B, CompB = 75)

******DO NOT EDIT THE "phaseFinder" FUNCTION******

Your task is to complete two of the functions used within "phaseFinder".
Those Functions are:
"checkBetaLiquid(T,B)"
"checkBeta(T,B)"
%}

function result = phaseFinder(Temp, CompB)
%checks the inputs are valid
validInputs = testInputConditions(Temp, CompB);
  
if validInputs == 1
%Determine which regions the inputs correspond to.
a = checkAlpha(Temp, CompB);
b = checkBeta(Temp, CompB);
l = checkLiquid(Temp, CompB);
a_b = checkAlphaBeta(Temp,CompB);
a_l = checkAlphaLiquid(Temp,CompB);
b_l = checkBetaLiquid(Temp,CompB);
  
%Creates an array indicating correspondance of inputs to regions
testArray = [a b l a_b a_l b_l];
  
%Check if the mixture sits at the Eutectic Point
if isequal(testArray, [0 0 1 1 1 1])
fprintf('Mixture sits on the Eutectic Point ');
result = 1;
  
%Check if the mixture sits at the juntion of any three regions
elseif isequal(testArray, [1 0 0 1 1 0])
fprintf(['Mixture sits on the alpha/alpha_liquid/alpha_beta ' ...
'junction on the Eutectic Line ']);
result = 2;
elseif isequal(testArray, [0 1 0 1 0 1])
fprintf(['Mixture sits on the beta/beta_liquid/alpha_beta ' ...
'junction on the Eutectic Line ']);
result = 3;
elseif isequal(testArray, [1 0 1 0 1 0])
fprintf(['Mixture sits on the alpha/alpha_liquid/liquid' ...
'junction ']);
result = 4;
elseif isequal(testArray, [0 1 1 0 0 1])
fprintf(['Mixture sits on the beta/beta_liquid/liquid' ...
'junction ']);
result = 5;
  
%Check if the mixture sits at the border of any two regions
elseif isequal(testArray, [1 0 0 1 0 0])
fprintf('Mixture sits on the alpha/alpha_beta border ');
result = 6;
elseif isequal(testArray, [1 0 0 0 1 0])
fprintf('Mixture sits on the alpha/alpha_liquid border ');
result = 7;
elseif isequal(testArray, [0 0 0 1 1 0])
fprintf(['Mixture sits on the alpha_liquid/alpha_beta ' ...
'border on the Eutectic Line ']);
result = 8;
elseif isequal(testArray, [0 1 0 1 0 0])
fprintf('Mixture sits on the beta/alpha_beta border ');
result = 9;
elseif isequal(testArray, [0 0 0 1 0 1])
fprintf(['Mixture sits on the beta_liquid/alpha_beta ' ...
'border on the Eutectic Line ']);
result = 10;
  
elseif isequal(testArray, [0 1 0 0 0 1])
fprintf('Mixture sits on the beta/beta_liquid border ');
result = 11;
elseif isequal(testArray, [0 0 1 0 1 0])
fprintf('Mixture sits on the liquid/alpha_liquid border ');
result = 12;
elseif isequal(testArray, [0 0 1 0 0 1])
fprintf('Mixture sits on the liquid/beta_liquid border ');
result = 13;
  
%check if the mixture sits at within only one of the regions
elseif isequal(testArray, [1 0 0 0 0 0])
fprintf('Mixture belongs to the alpha region ');
result = 14;
elseif isequal(testArray, [0 1 0 0 0 0])
fprintf('Mixture belongs to the beta region ');
result = 15;
elseif isequal(testArray, [0 0 1 0 0 0])
fprintf('Mixture belongs to the liquid region ');
result = 16;
elseif isequal(testArray, [0 0 0 1 0 0])
fprintf('Mixture belongs to the alpha_beta region ');
result = 17;
elseif isequal(testArray, [0 0 0 0 1 0])
fprintf('Mixture belongs to the alpha_liquid region ');
result = 18;
elseif isequal(testArray, [0 0 0 0 0 1])
fprintf('Mixture belongs to the beta_liquid region ');
result = 19;
  
%Declares that the mixture is not within any of the defined regions
else
fprintf(['Mixture belongs to an immpossible combination of' ...
' regions ... that can''t be right ']);
result = 20;
end
else
%Inputs were not valid
result = -1;
end
end

%The Following function checks that;
%Input Temperature is non-negative
%Input Composition is between 0 and 100
%DO NOT EDIT THIS FUNCTION
function test = testInputConditions(T,B)
if (T >= 0) && (B >= 0) && (B <= 100)
test = 1;
else
test = 0;
if (T < 0)
fprintf('Input Error: Temp(Celcius) must be +ve integer ');
end
if (B < 0) || (B >100)
fprintf('Input Error: Comp(%%A) must be between 0 and 100 ');
end
end
end

%The Following function checks if input conditions indicate that the
%mixture is in the 'alpha' region.
%DO NOT EDIT THIS FUNCTION

function a = checkAlpha(T,B)
maxTemp = -(400/15)*B + 700;
minTemp = 20*B;
if (T <= maxTemp) && (T >= minTemp)
a = 1;
else
a = 0;
end
end

%The Following function checks if input conditions indicate that the
%mixture is in the 'alpha + beta' region.
%DO NOT EDIT THIS FUNCTION

function a_b = checkAlphaBeta(T,B)
minComp = 0.05*T;
maxComp = 100 - 0.05*T;
if (T <= 300) && (B >= minComp) && (B <= maxComp)
a_b = 1;
else
a_b = 0;
end
end

%The Following function checks if input conditions indicate that the
%mixture is in the 'alpha + liquid' region.
%Sets output to 1 if the mixtue is WITHIN the region, otherwise sets to 0.
%DO NOT EDIT THIS FUNCTION
function a_liquid = checkAlphaLiquid(T,B)
minComp = 26.25 - 0.0375*T;
maxComp = 87.5 - (T/8);
if (T>= 300) && (T <= 700) && (B >= minComp) && (B <= maxComp)
a_liquid = 1;
else
a_liquid = 0;
end
end

%The Following function checks if input conditions indicate that the
%mixture is in the 'beta + liquid' region.
%Sets output to 1 if the mixtue is WITHIN the region, otherwise sets to 0.

function b_liquid = checkBetaLiquid(T,B)
b_liquid = 1;%REMOVE THIS LINE AND COMPLETE THE FUNCTION
end

%The Following function checks if input conditions indicate that the
%mixture is in the 'liquid' region.
%Sets output to 1 if the mixtue is WITHIN the region, otherwise sets to 0.
%DO NOT EDIT THIS FUNCTION

function liquid = checkLiquid(T,B)
minAlphaTemp = 700 - 8*B;
minBetaTemp = 10*B - 200;
if (T >= minAlphaTemp) && (T >= minBetaTemp)
liquid = 1;
else
liquid = 0;
end
end

%The Following function checks if input conditions indicate that the
%mixture is in the 'beta' region.
%Sets output to 1 if the mixtue is WITHIN the region, otherwise sets to 0.

function b = checkBeta(T,B)
b = 0;%REMOVE THIS LINE AND COMPLETE THE FUNCTION
end

Explanation / Answer

This is the EPF PRO which is a dual function hazardous voltage and live phase finder and will detect if voltages greater than 40VAC are present in order to protect operatives from dangerous live circuits, direct contact or leakage situations at electrical cabinets, street lighting columns and wooden, concrete and metal poles that carry live overhead supplies.

The EPF PRO uses direct contact for measuring (using the safest method known -capacitive coupling), the identification of the Live Phase is more certain than using Non-Contact Voltage Indicators or similar devices. It is extremely safe to use as there is no need to operate touch pads or any other direct contact method to operate the unit correctly.

It should be checked on a known live source before and after each use. Personal Protective Equipment (insulated gloves and gauntlets, etc) can be worn without affecting its operation. You should place the tip of the EPF PRO firmly in contact with the pole or metal cabinet or exposed terminals/cables under test. Fault leakage voltage found or live phase conductors above 40V will be indicated by the front section flashing Red and an audible tone.

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.