US3883799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for stabilizing conductance of conversion of mechanical displacements into electric signal of capacitance transducer and device for effecting same
Assignee: Individual
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Filing: 1973-12-28
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Granted: 1975-05-13
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Expires: 1993-12-28
Abstract
Abstract A method for stabilizing the conductance of conversion of mechanical displacements into an electric signal of a capacitance transducer incorporated into a bridge circuit consists, according to the invention, in controlling the supply voltage of the capacitance transducer and thus keeping constant the total current of two capacitors of the capacitance transducer, which is being measured continuously. A device for effecting the proposed method comprises two measuring current transformers whose primary windings, together with the series-connected capacitors of the capacitance transducer, make up two arms of a measuring bridge, the other two arms of that bridge being made up by resistors; a capacitor connected to the diagonal of the measuring bridge; a second capacitor connected to the circuit of series-connected secondary windings of the two measuring current transformers; an alternating voltage amplifier connected to the second capacitor; a demodulator connected to the alternating voltage amplifier; a stabilized direct-current voltage source and a comparator, the latter being connected to the demodulator and the stabilized direct-current voltage source and, via a direct-current voltage amplifier, to a servomotor which is mechanically coupled, via a reduction gear, to an output voltage regulator of a harmonic oscillator.
Inventors
- 👤 Lev Petrovich Ulyanov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:35
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/14; G01L1/142; G01L1/144; G01L9/00; G01L9/12; G01L9/125
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
A method for stabilizing the conductance of conversion of mechanical displacements into an electric signal of a capacitance transducer having two capacitors incorporated into a bridge circuit, consisting in shunting the output of said capacitance transducer, continuously measuring the total current of said two capacitors of said capacitance transducer, controlling the supply voltage of the capacitance transducer and stabilizing said total current, which is being measured, of said two capacitors of said capacitance transducer.
Claim 2
Independent Claim
74 words
A method for stabilizing the conductance of conversion of mechanical displacements into an electric signal of a capacitance transducer having two capacitors incorporated into a bridge circuit, consisting in shunting the output of said capacitance transducer, continuously measuring the total current of said two capacitors of said capacitance transducer, controlling the supply voltage of the capacitance transducer and stabilizing said total current, which is being measured, of said two capacitors of said capacitance transducer.
Claim 3
Independent Claim
466 words
A device for effecting the method for stabilizing the conductanCe of conversion of mechanical displacements into an electric signal of a capacitance transducer, comprising a harmonic oscillator; an input and an output of said harmonic oscillator; an output voltage regulator of said harmonic oscillator; an input and an output of said output voltage regulator; said input of said output voltage regulator being connected to said output of the harmonic oscillator; two terminals of said output voltage regulator; resistors; a measuring current transformer; a primary winding and a secondary winding of said measuring current transformer; two leads of said primary winding of said measuring current transformer; one said lead of said primary winding of said measuring current transformer being connected to one said terminal of said output voltage regulator; a second measuring current transformer; a primary winding and a secondary winding of said second measuring current transformer; two leads of said primary winding of said second measuring current transformer; one said lead of said primary winding of said second current transformer being connected to said other terminal of said output voltage regulator; a circuit made up by series-connected said secondary windings of said two measuring current transformers; two output terminals of the device; one of said output terminals of the device being connected to each of said second leads of said primary windings of said measuring current transformers; one of said capacitors of said capacitance transducer being connected in series to each of said two output terminals of the device; a measuring bridge; a diagonal of the measuring bridge; each of two arms of said measuring bridge being made up by one of said primary windings of said measuring current transformers together with one of said series-connected capacitors of said capacitance transducer; two other arms of said measuring bridge being made up by said resistors; a capacitor connected to said diagonal of said measuring bridge; two leads of said capacitor; one of said leads of said capacitor being a third output terminal of the device; a second capacitor connected to said circuit of said series-connected secondary windings of said two measuring current transformers; an alternating voltage amplifier; an input and an output of said alternating voltage amplifier; said input of said alternating voltage amplifier being connected to said second capacitor; a demodulator connected to said output of said alternating voltage amplifier; a stabilized direct-current voltage source; an input and an output of said stabilized direct-current voltage source; a comparator; an input and an output of said comparator; said comparator being connected to said demodulator and said output of said stabilized direct-current voltage source; a servomotor; a reduction gear; a direct-current voltage amplifier connected to said output of said comparator and to said servomotor; said servomotor being mechanically coupled via said reduction gear to said output voltage regulator.
Claim 4
Independent Claim
466 words
A device for effecting the method for stabilizing the conductanCe of conversion of mechanical displacements into an electric signal of a capacitance transducer, comprising a harmonic oscillator; an input and an output of said harmonic oscillator; an output voltage regulator of said harmonic oscillator; an input and an output of said output voltage regulator; said input of said output voltage regulator being connected to said output of the harmonic oscillator; two terminals of said output voltage regulator; resistors; a measuring current transformer; a primary winding and a secondary winding of said measuring current transformer; two leads of said primary winding of said measuring current transformer; one said lead of said primary winding of said measuring current transformer being connected to one said terminal of said output voltage regulator; a second measuring current transformer; a primary winding and a secondary winding of said second measuring current transformer; two leads of said primary winding of said second measuring current transformer; one said lead of said primary winding of said second current transformer being connected to said other terminal of said output voltage regulator; a circuit made up by series-connected said secondary windings of said two measuring current transformers; two output terminals of the device; one of said output terminals of the device being connected to each of said second leads of said primary windings of said measuring current transformers; one of said capacitors of said capacitance transducer being connected in series to each of said two output terminals of the device; a measuring bridge; a diagonal of the measuring bridge; each of two arms of said measuring bridge being made up by one of said primary windings of said measuring current transformers together with one of said series-connected capacitors of said capacitance transducer; two other arms of said measuring bridge being made up by said resistors; a capacitor connected to said diagonal of said measuring bridge; two leads of said capacitor; one of said leads of said capacitor being a third output terminal of the device; a second capacitor connected to said circuit of said series-connected secondary windings of said two measuring current transformers; an alternating voltage amplifier; an input and an output of said alternating voltage amplifier; said input of said alternating voltage amplifier being connected to said second capacitor; a demodulator connected to said output of said alternating voltage amplifier; a stabilized direct-current voltage source; an input and an output of said stabilized direct-current voltage source; a comparator; an input and an output of said comparator; said comparator being connected to said demodulator and said output of said stabilized direct-current voltage source; a servomotor; a reduction gear; a direct-current voltage amplifier connected to said output of said comparator and to said servomotor; said servomotor being mechanically coupled via said reduction gear to said output voltage regulator.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |