Patent US3693435A successfully refreshed from Google Patents.
US3693435A
Expired / Lapsed
US
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Time averaging method and apparatus for obtaining fluid measurements
Assignee: Individual
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Filing: 1970-08-19
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Granted: 1972-09-26
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Expires: 1990-08-19
Abstract
Abstract This specification discloses a method and apparatus for accumulating signals from a water-cut monitor and a flow meter in a form whereby the net oil and net water in an oil-water mixture may be determined. A flow meter signal in the form of constantamplitude, frequency-variable d-c pulses is applied to a capacitor to charge the same. A signal from the water-cut monitor is modulated in proportion to the meter signal in order to produce a modulated signal of d-c pulses in which pulse amplitude is proportional to water content and pulse frequency is proportional to flow rate. This modulated signal is stored on another capacitor. Both capacitors are interrogated at periodic time intervals in order to obtain read-out signals representative of the charges thereon and the capacitors are discharged. Also disclosed is a system for obtaining gas flow information. In this system a pressure signal is modulated in proportion to a Delta P signal to produce a modulated signal of d-c pulses which is applied to a capacitor. The capacitor is interrogated as described above.
Inventors
- 👤 John B Cox
- 👤 Jacque R Stoltz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:34
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/12; G01F1/125; G01F1/34; G01F1/36; G01F1/363; G01F1/74
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
135 words
In a method of characterizing a fluid flowing through a conduit, the steps comprising: a. generating a d-c signal representative of a characteristic of said fluid; b. generating a d-c signal of constant-amplitude pulses representative of the fluid flow through said conduit; c. modulating said characteristic signal in proportion to said fluid flow signal to produce a modulated signal of d-c pulses; d. applying said modulated signal to a first capacitor to charge said capacitor over a time interval; e. concomitantly with step (d) applying said fluid flow signal to a second capacitor to charge said capacitor over a time interval; f. producing a read-out sIgnal representative of the charge on each of said capacitors and discharging said capacitors; and g. charging said capacitors in accordance with steps (d) and (e) and repeating step (f).
Claim 2
Dependent Claim
135 words
In a method of characterizing a fluid flowing through a conduit, the steps comprising: a. generating a d-c signal representative of a characteristic of said fluid; b. generating a d-c signal of constant-amplitude pulses representative of the fluid flow through said conduit; c. modulating said characteristic signal in proportion to said fluid flow signal to produce a modulated signal of d-c pulses; d. applying said modulated signal to a first capacitor to charge said capacitor over a time interval; e. concomitantly with step (d) applying said fluid flow signal to a second capacitor to charge said capacitor over a time interval; f. producing a read-out sIgnal representative of the charge on each of said capacitors and discharging said capacitors; and g. charging said capacitors in accordance with steps (d) and (e) and repeating step (f).
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein said fluid comprises a plurality of components and said characteristic signal is representative of the concentration of one of said components in said fluid.
Claim 4
Dependent Claim
25 words
The method of claim 2 wherein said fluid is an oil-water mixture and said characteristic signal is representative of the water content of said mixture.
Claim 5
Dependent Claim
62 words
The method of claim 3 wherein said characteristic signal is an analog signal, said pulses comprising said fluid flow signal are frequency-variable and of constant duration, and said characteristic signal is gated in proportion to said fluid flow signal to produce a modulated signal of d-c pulses in which pulse-amplitude is proportional to water content and pulse-frequency is proportional to flow rate.
Claim 6
Dependent Claim
158 words
In a time averaging read-out system for a fluid flow meter and a fluid characteristic monitor, the combination comprising: first and second signal means for producing, respectively, a d-c signal representative of the fluid characteristic measured by said monitor and a d-c signal of constant-amplitude pulses representative of the fluid flow through said meter; first and second capacitors; first circuit means interconnecting said first signal means and said first capacitor; modulating means in said first circuit means for modulating said characteristic signal in proportion to said fluid flow signal to produce a modulated signal of d-c pulses for application to said first capacitor; second circuit means interconnecting said second signal means and said second capacitor for applying said fluid flow signal to said second capacitor concomitantly with the application of said modulated signal to said first capacitor; means for producing a read-out signal representative of the charge on each of said capacitors; and means for discharging said capacitors.
Claim 7
Dependent Claim
158 words
In a time averaging read-out system for a fluid flow meter and a fluid characteristic monitor, the combination comprising: first and second signal means for producing, respectively, a d-c signal representative of the fluid characteristic measured by said monitor and a d-c signal of constant-amplitude pulses representative of the fluid flow through said meter; first and second capacitors; first circuit means interconnecting said first signal means and said first capacitor; modulating means in said first circuit means for modulating said characteristic signal in proportion to said fluid flow signal to produce a modulated signal of d-c pulses for application to said first capacitor; second circuit means interconnecting said second signal means and said second capacitor for applying said fluid flow signal to said second capacitor concomitantly with the application of said modulated signal to said first capacitor; means for producing a read-out signal representative of the charge on each of said capacitors; and means for discharging said capacitors.
Claim 8
Dependent Claim
180 words
In a system for determining the net oil and net water in an oil-water mixture, the combination comprising: a water-cut monitor; first signal means associated with said monitor for producing an analog d-c signal representative of water content; a flow meter; second signal means associated with said meter for producing a d-c signal of constant-amplitude, frequency-variable pulses representative of fluid flow through said meter; first and second capacitors; first circuit means interconnecting said first signal means and said first capacitor; modulating means in said first circuit means for gating said water content signal in proportion to said fluid flow signal to produce a modulated signal of d-c pulses in which pulse amplitude is proportional to water content and pulse frequency is proportional to flow rate; second circuit means interconnecting said second signal means and said second capacitor for applying said fluid flow signal to said second capacitor concomitantly with the application of said modulated signal to said first capacitor; means for producing a read-out signal representative of the charge on each of said capacitors; and means for discharging said capacitors.
Claim 9
Dependent Claim
180 words
In a system for determining the net oil and net water in an oil-water mixture, the combination comprising: a water-cut monitor; first signal means associated with said monitor for producing an analog d-c signal representative of water content; a flow meter; second signal means associated with said meter for producing a d-c signal of constant-amplitude, frequency-variable pulses representative of fluid flow through said meter; first and second capacitors; first circuit means interconnecting said first signal means and said first capacitor; modulating means in said first circuit means for gating said water content signal in proportion to said fluid flow signal to produce a modulated signal of d-c pulses in which pulse amplitude is proportional to water content and pulse frequency is proportional to flow rate; second circuit means interconnecting said second signal means and said second capacitor for applying said fluid flow signal to said second capacitor concomitantly with the application of said modulated signal to said first capacitor; means for producing a read-out signal representative of the charge on each of said capacitors; and means for discharging said capacitors.
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |