[특허]Piezoelectric transducer sensor for use in a press

Piezoelectric transducer sensor for use in a press 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B30B-015/28
출원번호	US-0832542 (1969-05-12)
발명자 / 주소	Dybel Frank R. (Calumet City IL)
출원인 / 주소	International Measurement & Control Co. (Park Forest South IL 02)
인용정보	피인용 횟수 : 19 인용 특허 : 0

초록 ▼

A piezoelectric transducer is positioned on a member of a power press subject to stress under dynamic conditions. A ball joint bracket means fixes and maintains the transducer on the member parallel with the direction of force and with the faces of the piezoelectric ceramic plate perpendicular thereto. The high voltage signal generated by the transducer is transmitted to a signal conditioning circuit and impressed upon the grid of a grid-controlled vacuum tube. If the conditioned signal is sufficient to overcome the biasing grid voltage, it activates an electric circuit for the performance of one or more functions, including stopping the power press in the case of an overload, counting the number of times the press is overloaded or the number of times a workpiece is produced, and measuring the press load during a work cycle.

대표청구항 ▼

In a machine having two work members movable with respect to each other and subject to repetitive loading forces for transmission to a work piece between said members, at least one force carrying member carrying and transmitting said loading force to one of said work members, and an electrically responsive strain sensing device positioned on said force carrying member, the improvement in combination therewith wherein said sensing device is a piezoelectric transducer, said piezoelectric transducer comprising a piezoelectric element, a first terminal block positioned against one face of said element, a second terminal block positioned against the opposite side of said element, and means for shielding said piezoelectric element from electric and magnetic noise, a mounting means attached to and extending from the force carrying member, said mounting means comprising a first and a second bracket spaced from each other, one end of each bracket being attached to said force carrying member, the other ends of said brackets having contact means for engagement with said terminal blocks, at least one of said contact means being electrically nonconductive, said piezoelectric transducer being positionEd and clamped between the said other ends of the brackets with the contact means of said first bracket engaging said first terminal block and the contact means of said second bracket engaging said second terminal block so that the clamping force of the brackets is substantially parallel to and aligned with a line normal to the interfaces between said element and terminal blocks, and an energized electronic circuit electrically connected to the terminal blocks which circuit is predeterminedly activated by the output signal of the piezoelectric transducers when stressed during a work cycle of the machine to activate a machine monitoring means.

이 특허를 인용한 특허 (19)

McMaster Robert C. (Delaware OH), Apparatus for determining the fatigue condition of a structure.
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Wagner Rudolf (Stuttgart DEX), Apparatus, especially portable apparatus, for handling tubular- and/or rod-shaped workpieces or the like.
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Gloe Karl-Heinz (Reichelsheim DEX) Biehl Harald (Bensheim DEX), Crimped connector quality control method apparatus.
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Starkey, Glenn, Electronic cycle counter.
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Starkey, Glenn, Electronic cycle counter.
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Baltschun Horst (Rulzheim DEX), Hydraulic press tool protection arrangement.
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M채nner,Hans Peter, Injection mold with an electronic data storage including a counter.
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Fruin Harry J. (Barnsley GB2) Greenhough Paul (Cleckheaton GB2), Mining machine haulage transmission.
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Starkey, Glenn, Mold monitoring.
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Gold Phillip W. (Westminster CO) Moen Bruce A. (Golden CO), Monitor and control assembly for use with a can end press.
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Fleischman Thomas S. (North Canton OH), Multi-station piezoelectric load cycle counter.
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Haenni, Eduard; Frei, Theo, Plate bending apparatus.
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Lal, Amit; Tin, Steven, Self-powered, piezo-surface acoustic wave apparatus and method.
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Budraitis Tadas (Midlothian IL) Seliga Gerald W. (Frankfort IL), Sensor for reciprocating press.
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Budraitis Tadas (Midlothian IL) Seliga Gerald W. (Frankfort IL), Sensor for reciprocating press.
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Zahzah Mohamad ; Korkosz Gregory J. ; Bohr Gerald, Signal conditioning system.
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Dybel Frank R. (Olympia Fields IL) MacDonald Kenneth (Deerfield IL), Strain sensing device with magnetic mounting.
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Baltschun Horst (Rulzheim DEX), Tool protection arrangement for hydraulic presses.
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Donaldson Charles W. (Blanchester OH), Turbine blade measurement.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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연합인증

Piezoelectric transducer sensor for use in a press 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (19)

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Piezoelectric transducer sensor for use in a press 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허를 인용한 특허 (19)

관련 콘텐츠

특허 원문 보기

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