US3781772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic detection apparatus
Assignee: Panasonic Electric Works Co Ltd
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Filing: 1972-02-25
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Granted: 1973-12-25
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Expires: 1992-02-25
Abstract
Abstract An ultrasonic detection apparatus wherein a receiving transducer for receiving ultrasonic waves transmitted from a transmitting transducer is disposed relatively in proximity to the transmitting transducer. A gate circuit is provided between the receiving transducer and a relay circuit so that only the wave reflected from an object to be detected and reached the receiving transducer will be selectively supplied to the relay circuit.
Inventors
- 👤 H Inoue
- 👤 S Okamoto
- 👤 H Mori
- 👤 H Ohasi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:58
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/18; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/10; G01S15/18; Y; Y10; Y10S; Y10S367/00; Y10S367/901
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
229 words
An ultrasonic detection apparatus comprising an ultrasonic oscillator for generating a pulse type output voltage, a transmitting transducer for generating an ultrasonic wave by the output of said ultrasonic oscillator, a receiving transducer for receiving said ultrasonic wave from said transmitting transducer and converting the ultrasonic wave into an electrical signal as an output, an amplifier for amplifying said output of said receiving transducer, a switching circuit synchronized with said pulse type output voltage from the oscillator and shortcircuiting AC power supplied to said ultrasonic oscillator for a predetermined time interval after said pulse type output voltage is generated, a gate signal generating circuit for generating a pulse having a width smaller than the oscillation interval of the pUlse type output voltage of the oscillator, a delay circuit for delaying said pulse from the gate signal generating circuit, a gate circuit for gating the output from said amplifier in response to the output from said gate circuit, a first integrating circuit for integrating the output from said shaping circuit, a second integrating circuit having a time constant smaller than that of said first integrating circuit and preliminarily charged, and a relay switch actuated when the output from said first integrating circuit reaches a predetermined value, so that when said relay switch is actuated the output from the detecting and shaping circuit will be applied to the second integrating circuit.
Claim 2
Dependent Claim
229 words
An ultrasonic detection apparatus comprising an ultrasonic oscillator for generating a pulse type output voltage, a transmitting transducer for generating an ultrasonic wave by the output of said ultrasonic oscillator, a receiving transducer for receiving said ultrasonic wave from said transmitting transducer and converting the ultrasonic wave into an electrical signal as an output, an amplifier for amplifying said output of said receiving transducer, a switching circuit synchronized with said pulse type output voltage from the oscillator and shortcircuiting AC power supplied to said ultrasonic oscillator for a predetermined time interval after said pulse type output voltage is generated, a gate signal generating circuit for generating a pulse having a width smaller than the oscillation interval of the pUlse type output voltage of the oscillator, a delay circuit for delaying said pulse from the gate signal generating circuit, a gate circuit for gating the output from said amplifier in response to the output from said gate circuit, a first integrating circuit for integrating the output from said shaping circuit, a second integrating circuit having a time constant smaller than that of said first integrating circuit and preliminarily charged, and a relay switch actuated when the output from said first integrating circuit reaches a predetermined value, so that when said relay switch is actuated the output from the detecting and shaping circuit will be applied to the second integrating circuit.
Claim 3
Dependent Claim
106 words
An ultrasonic detection apparatus as defined in claim 1, in which said ultrasonic oscillator comprises a thyristor to which an alternating source current is applied at both ends, a condenser and a primary winding of a transformer connected in a closed series circuit with said thyristor, an oscillation element connected to both ends of a secondary winding of said transformer, and a diode for short-circuiting negative half cycles of said alternating source current, said switching circuit comprising a monostable multivibrator for short-circuiting the alternating source current while an output voltage of said multivibrator is present, said multivibrator being driven by a trigger pulse from said oscillator.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |