초록 ▼

A method that includes: (i) detecting an acoustic wave that is propagating through a body of water, as the body of water is being frozen on a structure, thus yielding a detected acoustic wave; (ii) extracting, from the detected acoustic wave, (a) a frequency component thereof, and (b) a magnitude of

A method that includes: (i) detecting an acoustic wave that is propagating through a body of water, as the body of water is being frozen on a structure, thus yielding a detected acoustic wave; (ii) extracting, from the detected acoustic wave, (a) a frequency component thereof, and (b) a magnitude of the frequency component; and (iii) removing the body of water from the structure when the magnitude exceeds a threshold value.

대표청구항 ▼

1. A method comprising: detecting an acoustic wave that is propagating through a body of water, as said body of water is being frozen on a structure, thus yielding a detected acoustic wave;extracting, from said detected acoustic wave, (a) a frequency component thereof, (b) a magnitude of said freque

1. A method comprising: detecting an acoustic wave that is propagating through a body of water, as said body of water is being frozen on a structure, thus yielding a detected acoustic wave;extracting, from said detected acoustic wave, (a) a frequency component thereof, (b) a magnitude of said frequency component, (c) a harmonic of said frequency component, and (d) a magnitude of said harmonic; andremoving said body of water from said structure when both of (i) said magnitude of said frequency component exceeds a first threshold value, and (ii) said magnitude of said harmonic exceeds a second threshold value. 2. The method of claim 1, wherein said detected acoustic wave is a time-domain signal, andwherein said extracting comprises: transforming said time-domain signal to a frequency-domain signal; andobtaining said frequency component, said magnitude of said frequency component, said harmonic, and said magnitude of said harmonic, from said frequency-domain signal. 3. A system comprising: a detector that detects an acoustic wave that is propagating through a body of water, as said body of water is being frozen on a structure, thus yielding a detected acoustic wave; anda processor that: extracts, from said detected acoustic wave, (a) a frequency component thereof, (b) a magnitude of said frequency component, (c) a harmonic of said frequency component, and (d) a magnitude of said harmonic; andissues a signal to remove said body of water from said structure when both of (i) said magnitude of said frequency component exceeds a first threshold value, and (ii) said magnitude of said harmonic exceeds a second threshold value. 4. The system of claim 3, wherein said detected acoustic wave is a time-domain signal, andwherein said processor, to extract said frequency component and said magnitude: transforms said time-domain signal to a frequency-domain signal; andobtains said frequency component, said magnitude of said frequency component, said harmonic, and said magnitude of said harmonic, from said frequency-domain signal. 5. The system of claim 3, wherein said detector comprises a microphone in a probe that is situated less than 0.5 inches from said structure. 6. The system of claim 3, wherein said detector comprises a microphone in a probe that is in contact with said structure. 7. The system of claim 3, wherein said detector comprises a microphone in a probe that is situated less than 0.5 inches from said body of water. 8. The system of claim 3, wherein said detector comprises a microphone in a probe that is in contact with said body of water. 9. A non-transitory computer-readable storage medium comprising instructions that are readable by a processor, and that when read by said processor cause said processor to: extract, from a detected acoustic wave, (a) a frequency component thereof, (b) a magnitude of said frequency component, wherein said detected acoustic wave represents an acoustic wave that is propagating through a body of water, as said body of water is being frozen on a structure, (c) a harmonic of said frequency component, and (d) a magnitude of said harmonic; andissue a signal to remove said body of water from said structure when both of (i) said magnitude exceeds a threshold value, and (ii) said magnitude of said harmonic exceeds a second threshold value. 10. The non-transitory computer-readable storage medium of claim 9, wherein said detected acoustic wave is a time-domain signal, and wherein said processor, to extract said frequency component and said magnitude: transforms said time-domain signal to a frequency-domain signal; andobtains said frequency component, said magnitude of said frequency component, said harmonic, and said magnitude of said harmonic, from said frequency-domain signal.