Acoustic detection of machinery malfunction
First Claim
1. Sound variation indication apparatus, comprising:
- a comparison element that receives an audio signal, compares the audio signal to a check value, and provides a status signal based on an outcome of the comparison, wherein the status signal indicates a presence and absence of the sound input as corresponding to the check value, respectively indicating a presence value and an absence value;
an interval checker that receives the status signal and determines a value of the status signal at predetermined intervals, to provide an interval output that is a presence representation if a presence value is determined during an interval and an absence representation if no presence value is determined during an interval; and
an indication generator that receives the interval output and generates an indication if the interval output is an absence representation.
1 Assignment
0 Petitions
Accused Products
Abstract
A sound variation indication apparatus includes a comparison element, an interval checker, and an indication generator. The comparison element receives an audio signal and compares it to a check value to provide a status signal indicating a presence and absence of an expected sound input. The interval checker detects the status signal at predetermined intervals, to provide an interval output. The indication generator generates an indication if the interval output is an absence representation. A process of generating an indication on absence of a sound input includes providing an audio signal based on a sound input and comparing the audio signal to a check value, providing a status signal indicating a presence and absence of the sound input. A status signal value is determined at predetermined intervals, to provide an interval output. An indication is generated if the interval output is an absence representation.
12 Citations
82 Claims
-
1. Sound variation indication apparatus, comprising:
-
a comparison element that receives an audio signal, compares the audio signal to a check value, and provides a status signal based on an outcome of the comparison, wherein the status signal indicates a presence and absence of the sound input as corresponding to the check value, respectively indicating a presence value and an absence value; an interval checker that receives the status signal and determines a value of the status signal at predetermined intervals, to provide an interval output that is a presence representation if a presence value is determined during an interval and an absence representation if no presence value is determined during an interval; and an indication generator that receives the interval output and generates an indication if the interval output is an absence representation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 73, 74, 75, 76, 77)
-
-
35. Sound variation indication apparatus, comprising:
-
a plurality of comparison elements that each receives one of a plurality of audio signals from a respective one of the plurality of sound transducers, wherein each of the plurality of comparison elements compares the received audio signal to a corresponding check value, and provides a respective status signal based on an outcome of the comparison, wherein each said status signal indicates a presence and absence of the respective sound input as corresponding to the check value, respectively indicating a presence value and an absence value; a plurality of interval checkers that each receives the respective status signal and determines a value of the status signal at predetermined intervals, to provide a respective interval output that is a presence representation if a presence value is determined during an interval and an absence representation if no presence value is determined during an interval; a summary status checker that receives the interval outputs and provides a summary status that has a first value if a number of interval outputs that are presence representations is at least a predetermined number, and that has a second value if the number of interval outputs that are presence representations is less than the predetermined number; and an indication generator that receives the summary status and generates an indication if the summary status is the second value. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44)
-
-
45. A process of generating an indication on variation of a sound input, comprising:
-
providing an audio signal based on a received sound input; comparing the audio signal to a check value; providing a status signal based on an outcome of the comparison, wherein the status signal indicates a presence and absence of the sound input as corresponding to the check value, respectively indicating a presence value and an absence value; determining a value of the status signal at predetermined intervals, to provide an interval output that is a presence representation if a presence value is determined during an interval and an absence representation if no presence value is determined during an interval; and generating an indication if the interval output is an absence representation. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 78, 79, 80, 81, 82)
-
Specification