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US4165458A
Expired / Lapsed
US
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Signal decision system
Assignee: Mitsubishi Electric Corp
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Filing: 1977-04-14
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Granted: 1979-08-21
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Expires: 1997-04-14
Abstract
Abstract An electrical signal originating from an abnormal sound is passed through a bandpass filter and compared with a reference signal by a comparator. When the electrical signal is not less than the reference signal, the comparator produces a pulse. A counter counts the pulses from the comparator and causes a display device to display the presence of the abnormal sound when its count exceeds a predetermined value within a predetermined time interval.
Inventors
- 👤 Takayuki Koizumi
- 👤 Teruo Usami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:38
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/001
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
125 words
A signal decision system comprising, in combination, a detector means for detecting a signal from an object to be measured, a filter means connected to said detector means for filtering the output signal from said detector means, a comparison means connected to said filter means for comparing the output signal from said filter means with a reference signal for producing a pulsed signal when said output signal from said filter means has a level not less than a predetermined level, and a decision generation means connected to said comparison means for counting said pulsed signals successively produced from said comparison means for producing a decision signal when the counted number of said pulsed signals equals at least a predetermined value within a predetermined time interval.
Claim 2
Dependent Claim
125 words
A signal decision system comprising, in combination, a detector means for detecting a signal from an object to be measured, a filter means connected to said detector means for filtering the output signal from said detector means, a comparison means connected to said filter means for comparing the output signal from said filter means with a reference signal for producing a pulsed signal when said output signal from said filter means has a level not less than a predetermined level, and a decision generation means connected to said comparison means for counting said pulsed signals successively produced from said comparison means for producing a decision signal when the counted number of said pulsed signals equals at least a predetermined value within a predetermined time interval.
Claim 3
Dependent Claim
18 words
A decision system as claimed in claim 1 wherein said decision signal is a signal indicating an abnormality.
Claim 4
Dependent Claim
22 words
A signal decision system as claimed in claim 1 wherein said signal from said object to be measured is an abnormal sound.
Claim 5
Dependent Claim
24 words
A signal decision system as claimed in claim 3 wherein said detector means includes means for converting said abnormal sound to an electrical signal.
Claim 6
Dependent Claim
25 words
A signal decision system as claimed in claim 4 wherein said means for converting said abnormal sound to said electrical signal comprises a sound collector.
Claim 7
Dependent Claim
25 words
A signal decision system as claimed in claim 3 wherein said means for converting said abnormal sound to said electrical signal comprises a sound collector.
Claim 8
Dependent Claim
23 words
A signal decision system as claimed in claim 1 wherein said signal from said object to be measured is an abnormal electrical signal.
Claim 9
Dependent Claim
17 words
A signal decision system as claimed in claim 1 wherein said filter means is a bandpass filter.
Claim 10
Dependent Claim
35 words
A signal decision system as claimed in claim 1 wherein said decision generation means comprises a counter, a time setter for setting said predetermined time interval, and a number setter for setting said predetermined value.
Claim 11
Dependent Claim
17 words
A signal decision system as claimed in claim 1 wherein said predetermined time interval is infinitely large.
Claim 12
Dependent Claim
24 words
A signal decision system as claimed in claim 1 wherein said decision generation means comprises a time setter for setting said predetermined time interval.
Claim 13
Dependent Claim
23 words
A signal decision system as claimed in claim 1 wherein said decision generation means comprises a number setter for setting said predetermined value.
Claim 14
Dependent Claim
171 words
A signal decision system comprising, in combination, a detector means for detecting a signal from an object to be measured, a plurality of filter means connected to said detector means, each of said plurality of filter means for filtering the output signal from said detector means, a plurality of comparison means each connected to a corresponding one of said plurality of filter means for comparing the output signal from said corresponding filter means with a reference signal to produce a pulsed signal when said output signal from said corresponding filter means has a level not less than a predetermined level, a plurality of decision generation means each connected to a corresponding one of said comparison means for counting said pulsed signals successively produced by said corresponding comparison means and for producing a decision signal when the counted number of said pulsed signals equals at least a predetermined value, and a single display means connected to all of said plurality of decision generation means to display the presence of said decision signal.
Claim 15
Dependent Claim
171 words
A signal decision system comprising, in combination, a detector means for detecting a signal from an object to be measured, a plurality of filter means connected to said detector means, each of said plurality of filter means for filtering the output signal from said detector means, a plurality of comparison means each connected to a corresponding one of said plurality of filter means for comparing the output signal from said corresponding filter means with a reference signal to produce a pulsed signal when said output signal from said corresponding filter means has a level not less than a predetermined level, a plurality of decision generation means each connected to a corresponding one of said comparison means for counting said pulsed signals successively produced by said corresponding comparison means and for producing a decision signal when the counted number of said pulsed signals equals at least a predetermined value, and a single display means connected to all of said plurality of decision generation means to display the presence of said decision signal.
Claim 16
Dependent Claim
45 words
A signal decision system as claimed in claim 13 wherein said system further comprises a logic circuit connected between all of said plurality of decision generation means and said display means for performing a logic conjunction of said decision signals from said decision generation means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-20 | 1983-02-19 | 1983-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-20 | 1987-02-19 | 1987-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-20 | 1991-02-19 | 1991-08-21 | $7700.00 | Window Closed / Lapsed |