Container screening system and method
A system and method are disclosed for interrogating a liquid in a container. In one embodiment, methods are provided to interrogate and identify a container material type and a liquid within a container.
1. A method for detecting metal in a sample in a screening system used to analyze contents of liquid-filled containers, the method comprising:
detecting a reflected signal waveform;
conducting a Fast Fourier Transformation (FFT) of the reflected signal waveform to generate a signal transform;
conducting a FFT of a baseline reflected signal to generate a baseline transform;
calculating ratios of the signal transform to the baseline transform at different frequencies; and
analyzing the reflected signal waveform to determine if the reflected signal waveform has a first peak saturation and a first minimum change that is greater than a preset voltage, and by applying a partial least squares algorithm to the ratios to determine if PLS<−0.05 and R8>0.75.
2. A method for detecting metal in a sample, the method comprising:
detecting a reflected signal waveform;
conducting a Fast Fourier Transformation (FFT) of the reflected signal waveform to generate a signal transform;
conducting a FFT of a baseline reflected signal to generate a baseline transform;
calculating ratios of the signal transform to the baseline transform at different frequencies; and
determining based on one or more results generated by a partial least square algorithm based on one or more o ratios whether the sample includes the metal.
3. The method of claim 2 , wherein the determining comprises analyzing the reflected signal waveform to determine if the reflected signal waveform has a first peak saturation and a first minimum change that is greater than a preset voltage.
4. The method of claim 3 , wherein the analyzing further comprises applying the partial least squares algorithm to the ratios to determine if PLS<−0.05 and R8>0.75 corresponding to determining that the sample includes the metal.