US3713112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Registration of noise level in communication systems
Assignee: Wandel and Golterman GmbH and Co
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Filing: 1971-02-24
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Granted: 1973-01-23
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Expires: 1991-02-24
Abstract
Abstract A noise detector receiving the outputs of one or more message channels works into a quantizer which, in response to a predetermined rise in cumulative noise, delivers a stepping pulse to a binary counter whose several stage outputs control respective hole punchers of a tape perforator. The quantizer and the counter are periodically reset by a programmer which also actuates another puncher to mark the beginning of each new day. A 1-hour average of the minute-mean noise-power values may be ascertained by a summing circuit which simultaneously receives, every 6 minutes, the 1-minute-mean values registered on the tape in 10 preceding 6-minute intervals; the output current of the summing circuit is compared with a reference current whose magnitude is 10 times that of a reference current equivalent to the maximum allowable 1-hour average.
Inventors
- 👤 K Heidenreich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:35
CPC Classifications
H; H04; H04J; H04J1/00; H04J1/02; H04J1/16
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
246 words
A noise-level recorder for a communication system with n message channels to be simultaneously monitored, comprising: programmer means establishing a succession of predetermined cycles each subdivided into n subcycles respectively allocated to said message channels; a tape marker including a plurality of aligned marking elements for an advancing tape; a noise-level detector; selector means controlled by said programMer for connecting said detector during each subcycle to the respective message channel for reception of noise energy propagated thereover; quantizer means connected to said detector for integrating said noise energy over a subcycle and generating a stepping pulse upon the cumulative value thereof increasing by a predetermined amount; multistage binary counting means connected to said quantizer means for actuation by the stepping pulses emanating therefrom and for delivering the pulse count to said tape marker; circuitry controlled by said programmer means for actuating said tape marker to register said pulse count once per subcycle and for thereupon resetting said quantizer means and said counting means; reading means for said tape disposed downstream of said tape marker, said reading means including a plurality of reading stations spaced along the path of said tape for simultaneous alignment with nonconsecutive rows of markings all produced during corresponding subcycles of successive cycles, said stations generating in each subcycle a combined output representative of the noise level of a respective channel as averaged over an extended period; and indicator means for signaling a rise of said averaged noise level above a predetermined limit.
Claim 2
Dependent Claim
246 words
A noise-level recorder for a communication system with n message channels to be simultaneously monitored, comprising: programmer means establishing a succession of predetermined cycles each subdivided into n subcycles respectively allocated to said message channels; a tape marker including a plurality of aligned marking elements for an advancing tape; a noise-level detector; selector means controlled by said programMer for connecting said detector during each subcycle to the respective message channel for reception of noise energy propagated thereover; quantizer means connected to said detector for integrating said noise energy over a subcycle and generating a stepping pulse upon the cumulative value thereof increasing by a predetermined amount; multistage binary counting means connected to said quantizer means for actuation by the stepping pulses emanating therefrom and for delivering the pulse count to said tape marker; circuitry controlled by said programmer means for actuating said tape marker to register said pulse count once per subcycle and for thereupon resetting said quantizer means and said counting means; reading means for said tape disposed downstream of said tape marker, said reading means including a plurality of reading stations spaced along the path of said tape for simultaneous alignment with nonconsecutive rows of markings all produced during corresponding subcycles of successive cycles, said stations generating in each subcycle a combined output representative of the noise level of a respective channel as averaged over an extended period; and indicator means for signaling a rise of said averaged noise level above a predetermined limit.
Claim 3
Dependent Claim
35 words
A recorder as defined in claim 1, further comprising circuit-breaker means inserted between said quantizer means and said counting means for preventing further stepping of the latter upon the count thereof reaching a predetermined maximum.
Claim 4
Dependent Claim
35 words
A recorder as defined in claim 2 wherein said circuit-breaker means comprises a coincidence gate connected to respective stage outputs of said counting means and switch means controlled by an output of said coincidence gate.
Claim 5
Dependent Claim
48 words
A recorder as defined in claim 1 wherein said reading means includes accumulator means for periodically summing the individual outputs of said stations to produce said combined output and comparison means for matching combined output against a reference magnitude, said indicator means being controlled by said comparison means.
Claim 6
Dependent Claim
47 words
A recorder as defined in claim 4 wherein each of said reading stations is provided with a digital-analog converter, said accumulator means being a current generator responsive to the combined outputs of said converters, said comparison means including a source of constant current constituting said reference magnitude.
Claim 7
Dependent Claim
31 words
A recorder as defined in claim 5 wherein said indicator means comprises n alarm devices enabled by said programmer during successive subcycles to signal an excessive noise power on respective channels.
Claim 8
Dependent Claim
21 words
A recorder as defined in claim 1 wherein said tape marker is a perforator and said marking elements are hole punchers.
Claim 9
Dependent Claim
34 words
A recorder as defined in claim 7 wherein said programmer means has an output lead for actuating another hole puncher of said perforator at the beginning and at the end of said extended period.
Claim 10
Dependent Claim
75 words
A recorder as defined in claim 7, further comprising integrating means connected to said quantizer means in parallel with said counting means for receiving said stepping pulses therefrom and converting same into a continuous voltage, said integrating means having a time constant substantially shorter than said subcycles, and output means connecting said integrating means to a further hole puncher of said perforator for marking said tape in response to said voltage exceeding a predetermined limit.
Claim 11
Dependent Claim
28 words
A recorder as defined in claim 9 wherein said output means includes a flip-flop periodically resettable by said programmer means and settable by said voltage exceeding said limit.
Claim 12
Independent Claim
151 words
A method of recording the noise level of a communication system with n message channels to be simultaneously monitored, comprising the steps of periodically sampling the noise level of each channel during a subcycle of a recurrent cycle divided into n subcycles respectively allocated to said channels, digitizing each sample, applying to an advancing tape during each subcycle a row of binaRy markings corresponding to a digitized sample, reading said markings at a location further downstream along the path of said tape at a plurality of stations spaced along said path for simultaneous alignment with nonconsecutive rows of markings all produced during corresponding subcycles of successive cycles, combining the individual readings of said stations into an output representative of the noise level of a respective channel as averaged over an extended period, comparing the combined output with a predetermined limit, and indicating a rise of said combined output above said limit.
Claim 13
Independent Claim
151 words
A method of recording the noise level of a communication system with n message channels to be simultaneously monitored, comprising the steps of periodically sampling the noise level of each channel during a subcycle of a recurrent cycle divided into n subcycles respectively allocated to said channels, digitizing each sample, applying to an advancing tape during each subcycle a row of binaRy markings corresponding to a digitized sample, reading said markings at a location further downstream along the path of said tape at a plurality of stations spaced along said path for simultaneous alignment with nonconsecutive rows of markings all produced during corresponding subcycles of successive cycles, combining the individual readings of said stations into an output representative of the noise level of a respective channel as averaged over an extended period, comparing the combined output with a predetermined limit, and indicating a rise of said combined output above said limit.
Claim 14
Dependent Claim
18 words
A method as defined in claim 11 wherein the sampled noise power is averaged over an entire subcycle.
Claim 15
Dependent Claim
21 words
A method as defined in claim 12 wherein each sampling period measures n minutes and said extended period equals 1 hour.
Claim 16
Dependent Claim
53 words
A method as defined in claim 11 wherein the sampled noise level is averaged over 1 minute and each cycle measures several minutes, comprising the further step of substantially continuously ascertaining the instantaneous noise level and registering on said tape any rise of said noise level above a predetermined threshold within each cycle.
Claim 17
Dependent Claim
32 words
A method as defined in claim 14 wherein said instantaneous noise level is ascertained by averaging, over a fraction of a second, the amount of noise energy propagated over the monitored channel.
References Cited (Backward Citations)
US2901739A
Cited
US3363067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |