Material property estimation using non-orthogonal responsive databases

A method for performing estimation of properties of a test material, said method comprising:

• identifying at least two distinct properties of the test material to be estimated;
• generating a database of precomputed sensor responses using a model for a range of values for each property, where variations in the sensor responses to changes in one property are non-orthogonal to variations in the sensor response for at least one other distinct property within the range of values for the properties;
• providing a measurement value from the test material;
• and
• thereafter, estimating a property value of the test material to minimize the difference between the precomputed responses and the measurement value without generating new sensor responses.

A method for performing estimation of properties of a test material, said method comprising:

• identifying at least two properties of the test material to be estimated;
• generating a database of precomputed sensor responses for a range of values for each property;
• providing a measurement value from the test material, where the measurement value is obtained with an eddy current sensor proximate to the test material and at multiple excitation frequencies;
• and
• thereafter, estimating a property value of the test material to minimize the difference between the precomputed responses and the measurement value without generating new sensor responses.

A method for performing estimation of properties of a test material, said method comprising:

• identifying at least two properties of the test material to be estimated;
• generating a database of precomputed sensor responses for a range of values for each property;
• providing a measurement value from the test material, where the measurement value is obtained with an electromagnetic sensor proximate to the test material and at multiple spatial wavelengths;
• and
• thereafter, estimating a property value of the test material to minimize the difference between the precomputed responses and the measurement value without generating new sensor responses.

A method for performing estimation of properties of a test material, said method comprising:

• identifying at least two properties of the test material to be estimated;
• generating a database of precomputed sensor responses for a range of values for each property, where the database includes derivatives of the sensor responses with respect to each property;
• providing a measurement value from the test material;
• and
• thereafter, estimating a property value of the test material to minimize the difference between the precomputed responses and the measurement value without generating new sensor responses.