Patent US1969379A successfully refreshed from Google Patents.
US3859846A
Expired / Lapsed
US
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Ultrasonic interface meter
Assignee: TOKYO KEIKIO (TOKYO KEIKI CO LTD) KK
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Filing: 1972-12-20
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Granted: 1975-01-14
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Expires: 1992-12-20
Abstract
Abstract An ultrasonic interface meter having ultrasonic wave transmitting and receiving elements mounted on a pipe through which liquids are transferred, and in which a signal transmitter circuit applies an electrical signal to the transmitting element, and an electric circuit for receiving the electrical signal from the receiving element to control the signal transmitter circuit so as to achieve a so-called sing-around operation, and an indicator means for indicating the sound velocity in said liquids. In this case, the ultrasonic wave is emitted into the liquid from the transmitting element in a direction oblique to the flow direction of the liquid in the pipe and is received by the receiving element after passing through said liquid.
Inventors
- 👤 Hidekazu Asada
- 👤 Kohzoh Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:01
CPC Classifications
G; G01; G01H; G01H5/00; G01N; G01N29/00; G01N29/02; G01N29/024
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
230 words
An ultrasonic interface meter for detecting a boundary between different liquids comprising, an ultrasonic wave transmitting element mounted on a pipe through which liquid is transferred, a signal transmitter circuit for periodically applying an electrical signal to said ultrasonic wave transmitting element which then produces a corresponding ultrasonic wave in a direction oblique to the flow direction of said liquid in said pipe, an ultrasonic wave receiving element mounted on said pipe at a position so as to receive the ultrasonic wave emitted from said ultrasonic wave transmitting element after it has passed through said liquid in said pipe and producing an electrical output signal, an output electrical circuit receiving the electrical output signal from said ultrasonic wave receiving element and controlling the period of said signal applied to said ultrasonic wave transmitting element and generating a sing-around frequency, an adjuster circuit connected to the output of said output electrical circuit and including an integrator circuit receiving an output of said output electrical circuit, a differential amplifier receiving an output of said output electrical circuit and the output of said integrator circuit, a pair of level detector circuits receiving the output of said differential amplifier, an inverter receiving the output of one of said level detector circuits, and an indicator receiving the output of said inverter circuit and the output of the other of said pair of level detector circuits.
Claim 2
Dependent Claim
230 words
An ultrasonic interface meter for detecting a boundary between different liquids comprising, an ultrasonic wave transmitting element mounted on a pipe through which liquid is transferred, a signal transmitter circuit for periodically applying an electrical signal to said ultrasonic wave transmitting element which then produces a corresponding ultrasonic wave in a direction oblique to the flow direction of said liquid in said pipe, an ultrasonic wave receiving element mounted on said pipe at a position so as to receive the ultrasonic wave emitted from said ultrasonic wave transmitting element after it has passed through said liquid in said pipe and producing an electrical output signal, an output electrical circuit receiving the electrical output signal from said ultrasonic wave receiving element and controlling the period of said signal applied to said ultrasonic wave transmitting element and generating a sing-around frequency, an adjuster circuit connected to the output of said output electrical circuit and including an integrator circuit receiving an output of said output electrical circuit, a differential amplifier receiving an output of said output electrical circuit and the output of said integrator circuit, a pair of level detector circuits receiving the output of said differential amplifier, an inverter receiving the output of one of said level detector circuits, and an indicator receiving the output of said inverter circuit and the output of the other of said pair of level detector circuits.
Claim 3
Dependent Claim
35 words
An ultrasonic interface meter as claimed in claim 1 in which said ultrasonic wave receiving element is mounted on said pipe in such a position that it receives the ultrasonic wave which is not reflected.
Claim 4
Dependent Claim
41 words
An ultrasonic interface meter as claimed in claim 1 in which said ultrasonic wave receiving element is mounted on said pipe in such a position that it receives the ultrasonic wave which is reflected on the inner surface of said pipe.
Claim 5
Dependent Claim
43 words
An ultrasonic interface meter according to claim 1 wherein said ultrasonic wave transmitting element and said ultrasonic wave receiving element include a pair of wedges, and said wedges being mounted on the outside of said pipe such that the ultrasonic wave passes therethrough.
Claim 6
Dependent Claim
52 words
An ultrasonic interface meter according to claim 1 including a thermo-sensitive element attached to said pipe to monitor the temperature of said liquid and producing an electrical output signal, and a correction voltage generator receiving the output signal from said thermo-sensitive element and supplying an output signal to said output electrical circuit.
Claim 7
Dependent Claim
240 words
An ultrasonic interface meter for detecting a boundary between different liquids comprising, an ultrasonic wave transmitting element mounted on a pipe through which liquid is transferred, a signal transmitter circuit for periodically applying an electrical signal to said ultrasonic wave transmitting element which then produces a corresponding ultrasonic wave in a direction oblique to the flow direction of said liquid in said pipe, an ultrasonic wave receiving element mounted on said pipe at a position so as to receive the ultrasonic wave emitted from said ultrasonic wave transmitting element after it has passed through said liquid in said pipe and producing an electrical output signal, an output electrical circuit receiving the electrical output signal from said ultrasonic wave receiving element and controlling the period of said signal applied to said ultrasonic wave transmitting element and generating a sing-around frequency, an adjuster circuit connected to the output of said output electrical circuit and including an integrator circuit receiving an output of said output electrical circuit, a differential amplifier receiving an output of said output electrical circuit and the output of said integrator circuit, a pair of level detector circuits receiving the output of said differential amplifier, an inverter receiving the output of one of said pair of level detectors, a stretcher circuit receiving the output of said inverter and the output of said other one of said pair of level detectors, and an indicator receiving the output of said stretcher circuit.
Claim 8
Dependent Claim
240 words
An ultrasonic interface meter for detecting a boundary between different liquids comprising, an ultrasonic wave transmitting element mounted on a pipe through which liquid is transferred, a signal transmitter circuit for periodically applying an electrical signal to said ultrasonic wave transmitting element which then produces a corresponding ultrasonic wave in a direction oblique to the flow direction of said liquid in said pipe, an ultrasonic wave receiving element mounted on said pipe at a position so as to receive the ultrasonic wave emitted from said ultrasonic wave transmitting element after it has passed through said liquid in said pipe and producing an electrical output signal, an output electrical circuit receiving the electrical output signal from said ultrasonic wave receiving element and controlling the period of said signal applied to said ultrasonic wave transmitting element and generating a sing-around frequency, an adjuster circuit connected to the output of said output electrical circuit and including an integrator circuit receiving an output of said output electrical circuit, a differential amplifier receiving an output of said output electrical circuit and the output of said integrator circuit, a pair of level detector circuits receiving the output of said differential amplifier, an inverter receiving the output of one of said pair of level detectors, a stretcher circuit receiving the output of said inverter and the output of said other one of said pair of level detectors, and an indicator receiving the output of said stretcher circuit.
Claim 9
Dependent Claim
69 words
An ultrasonic interface meter according to claim 6 including a thermosensitive element attached to said pipe to monitor the temperature of said liquid and producing an electrical output signal, a correction voltage generating circuit connected to said thermosensitive element and receiving the output signal therefrom and supplying an output signal to said output electrical circuit so as to compensate for temperature changes of said liquid flowing through said pipe.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |