[특허]Determining and indicating the quantity of a stored material

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Determining and indicating the quantity of a stored material

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01F-023/14
미국특허분류(USC)	073/290.B; 073/149
출원번호	US-0605500 (1984-04-30)
우선권정보	DE-0006130 (1982-02-20)
발명자 / 주소	Nicolai, Walter
대리인 / 주소	Beveridge, De Grandi & Weilacher
인용정보	피인용 횟수 : 21 인용 특허 : 1

초록
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This invention relates to a process for determining and indicating the quantity of a stored liquid or solid material, which is contained in a closed container of constant volume together with a gaseous filling medium introduced into the residual volume of the container interior, kept under a limitedly variable pressure (overpressure or underpressure) and varying from atmospheric pressure. The residual volume or a quantity constituting a measure thereof is measured and, calibrated in units of the stored product quantity, it being reproduced by means of an...

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1. Apparatus for determining and indicating the quantity of a stored liquid or solid product contained in a closed container of constant volume together with a gaseous or vaporous filling material filling the residual volume of the container interior and held under a limitedly variable pressure said residual volume serving as a measure of the quantity of the product stored in said container, said apparatus comprising: a pressure to voltage converter connected to said residual volume for generating a voltage signal indicative of the pressure in said residual volume; voltage responsive switching means connected to said converter and adapted to assume a first switching state when said converter voltage signal indicates the pressure within said residual volume is below a first preset value and to assume a second switching state when said converter voltage signal indicates the pressure within said residual volume is above a second preset value; pneumatic source means having an automatic switch-on and switch-off control; means defining a pressure compensation path between the residual volume and a reference pressure location; a controllable valve adapted to assume a first value state in which said pressure compensation path is blocked and to assume a second value state in which said pressure compensation path is open; control means for causing said valve to assume the first value state and switching on said pneumatic source means and for subsequently causing said valve to assume the second value state and switching off said pneumatic source means; and means responsive to operation of said control means for indicating the pressure within said residual volume. 2. Apparatus as claimed in claim 1 in which said reference pressure location is a location at ambient atmospheric pressure. 3. Apparatus as claimed in claim 1 in which said control means comprises a time dependent switch-on control and a pressure dependent switch-off control. 4. Apparatus as claimed in claim 1 in which said control means comprises a time dependent switch-on control and a time dependent switch-off control. 5. Apparatus as claimed in claim 3 in which said control means comprises means operable upon switching on of said pneumatic source means for operating said controllable valve to block the pressure compensation path and means operable upon the pressure in the residual volume reaching a preset value P 1 for operating said controllable valve to open the pressure compensation path. 6. Apparatus as claimed in claim 1 in which said pressure indicating means comprises a linear generator; means operable upon switching on of said pneumatic source means for activating said linear generator to generate a linearly increasing value; means operable upon the pressure in the residual volume reaching the preset value P 1 for sampling and storing the instantaneous value of the increasing value and then resetting said linear generator; and means for indicating the stored value as an indication of the quantity of stored product. 7. Apparatus as claimed in claim 6 in which said linear generator is a sweep generator which generates a linearly increasing voltage. 8. Apparatus as claimed in claim 6 in which said linear generator is a digital counting circuit which generates a linearly increasing count signal. 9. Apparatus as claimed in claim 4 in which said control means comprises a timer for providing turn-on signals to said switch on control and turn-off signals to said switch off control. 10. Apparatus as claimed in claim 9 in which said control means further comprises means operable upon switching on of said pneumatic means for operating said controllable valve to block the pressure compensation path and means operable upon switching off of said pneumatic means for operating said controllable valve to open the pressure compensation path. 11. Apparatus as claimed in claim 10 in which said pressure indicating means comprises a linear generator; means operable upon switching on of said pneumatic source means for activating said linear generator to generate a linearly increasing value; means operable upon switching off of said pneumatic source means for sampling and storing the instantaneous value of the increasing value and then resetting said linear generator; and means for indicating the stored value as an indication of the quantity of stored product. 12. Apparatus as claimed in claim 11 in which said linear generator is a sweep generator which generates a linearly increasing voltage. 13. Apparatus as claimed in claim 11 in which said linear generator is a digital counting circuit which generates a linearly increasing count signal. 14. Apparatus for determining and indicating the quantity of a stored liquid or solid product contained in a closed container of constant volume together with a gaseous or vaporous filling material filling the residual volume of the container interior and held under a limitedly variable pressure, said residual volume serving as a measure of the quantity of the product stored in said container, said apparatus comprising: a pneumatic source pump, having an automatic switch-on and switch-off control; means defining a pressure compensation path between the residual volume and a reference pressure location; a controllable valve for blocking and opening said pressure compensation path; means operable upon switching on of said pneumatic source pump for operating said controllable valve to block the pressure compensation path; means operable upon the pressure in the residual volume reaching a preset value P 1 for operating said controllable valve to open the pressure compensation path; a linear generator; means operable upon switching on of said pneumatic source pump for activating said linear generator to generate a linearly increasing value; means operable upon the pressure in the residual volume reaching the preset value P 1 for sampling and storing the instantaneous value of the increasing value and then resetting said linear generator; and means for indicating the stored value as an indication of the quantity of stored product. 15. Apparatus as claimed in claim 14 in which said linear generator is a sweep generator which generates a linearly increasing voltage. 16. Apparatus as claimed in claim 14 in which said linear generator is a digital counting circuit which generates a linearly increasing count signal. 17. Apparatus for determining and indicating the quantity of a stored liquid or solid product contained in a closed container of constant volume together with a gaseous or vaporous filling material filling the residual volume of the container interior and held under a limitedly variable pressure, said residual volume serving as a measure of the quantity of the product stored in said container, said apparatus comprising: a pneumatic source pump, having an automatic time dependent switch-on control and switch-off control; means defining a pressure compensation path between the residual volume and a reference pressure location; a controllable valve for blocking and opening said pressure compensation path; a timer for providing turn-on signals to said switch on control and turn-off signals to said switch off control; means operable upon switching on of said pneumatic pump for operating said controllable valve to block the pressure compensation path; means operable upon switching off of said pneumatic pump for operating said controllable valve to open the pressure compensation path; a linear generator; means operable upon switching on of said pneumatic source pump for activating said linear generator to generate a linearly increasing value; means operable upon switching off of said pneumatic source pump for sampling and storing the instantaneous value of the increasing value and then resetting said linear generator; and means for indicating the stored value as an indication of the quantity of stored product. 18. Apparatus as claimed in claim 17 in which said linear generator is a sweep generator which generates a linearly increasing voltage. 19. Apparatus as claimed in claim 17 in which said linear generator is a digital counting circuit which generates a linearly increasing count signal.

이 특허에 인용된 특허 (1)

Hrtel Gnter (Neuss DEX). Method of and device for measuring the amount of liquid fuel in a tank. USP1982104354383.

이 특허를 인용한 특허 피인용횟수: 21

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Determining and indicating the quantity of a stored material

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Determining and indicating the quantity of a stored material

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